DESC:CROSS-REFERENCE TO RELATED APPLICATIONS

[001] The present application is based on and claims priority from an Indian Provisional Application Number 202341053931 filed on 11-08-2023, the disclosure of which is hereby incorporated by reference herein.
BACKGROUND
Technical Field
[002] The present disclosure relates to a plurality of battery packs, and more specifically relates to a system and method to manage usage of the plurality of battery packs.
Description of the Related Art
[003] In general, a battery pack includes a plurality of cells. The plurality of cells may be connected in series, parallel, or a combination of both (series, and parallel) to deliver the desired voltage, capacity, or power density.
[004] In conventional methods, maximizing the efficiency of the battery pack, and extending the driving range of the electric vehicle with a single battery pack is difficult. So, the automobile manufacturers come up with a plurality of battery packs same capacity.
[005] In conventional methods, the automobile manufacturers come up with a switching process due to the usage of the plurality of battery packs. A State of Charge (SOC) of the battery pack is discharged to a predetermined level. After discharging to the predetermined level, power distribution from one battery pack is switched to another battery pack. At that time of the switching process, the inrush current may flow to one or more peripheral devices of the vehicle due to the various capacities of the plurality of battery packs. The inrush current flow may damage one or more peripheral devices of the vehicle.
[006] In other conventional methods, the automobile manufacturers use a simple switching circuit to switch power distribution from one battery pack to another battery pack. While using the simple switching circuit, at a period no battery pack will be connected to the one or more peripheral devices of the vehicle which will affect the operation of the vehicle.
[007] In other conventional methods, the automobile manufacturers use a simultaneous switching circuit to avoid a time gap (a period that no battery pack will be connected to the one or more peripheral devices of the vehicle). While using the simultaneous switching circuit, both the battery packs will be connected to the vehicle for a period, which will help the system to switch between battery packs without affecting the operation of the vehicle. At the same time, the simultaneous switching circuit may cause short-circuit issues between both battery packs. In addition, the simultaneous switching circuit may cause an energy drain/loss.
[008] The conventional methods do not have any course of action to avoid inrush current flow to the one or more peripheral devices of the vehicle, short-circuit issues, and the time gap between switching from one battery pack to another battery pack.
[009] So, the conventional method is not efficient for solving the above-mentioned problems efficiently. Hence is desirable to address the above-mentioned problem and disadvantages or at least provide a useful alternative.
SUMMARY
[0010] In view of the foregoing, an embodiment herein provides a system to manage usage of the plurality of battery packs. The system includes a plurality of battery packs, a control unit, a first state, and a second state. The plurality of battery packs includes a first battery pack with a first predetermined capacity and a second battery pack with a second predetermined capacity. The first battery pack distributes power to the vehicle till a first predetermined SOC level. The first battery pack includes a first Battery Management System (BMS). The first BMS includes a first pre-charge circuit, a second pre-charge circuit, a first discharge switch, and a first charge switch. The second battery pack distributes power to the vehicle till a second predetermined SOC level. The second battery pack includes a second BMS. The second BMS includes a third pre-charge circuit, a fourth pre-charge circuit, a second discharge switch, and a second charge switch. The first state turns the vehicle on from idle to run using the first battery pack. The first state switches power distribution from the first battery pack to the second battery pack when the SOC of the first battery pack is discharged to the first predetermined SOC level by sending a first set of control signals to the first BMS and the second BMS from the control unit. The second state turns the vehicle on from idle to run using the second battery pack. The second state switches power distribution from the second battery pack to the first battery pack when the SOC of the second battery pack is discharged to the second predetermined SOC level by sending a second set of control signals to the first BMS and the second BMS from the control unit.
[0011] In some embodiments, the first state includes a first regulation path, a first supply path, a first switch path, a second regulation path, and a second supply path.
[0012] In some embodiments, the control unit regulates current level of the first battery pack to a first predetermined current level and allows the first predetermined current level of the first battery pack via the first regulation path. The first regulation path includes a first set of a plurality of cells, the first pre-charge circuit, the first charge switch, and the load/the subsystem. The control unit allows a second predetermined current level of the first battery pack to the load/the subsystem via the first supply path. The first supply path includes the first set of the plurality of cells, the first discharge switch, the first charge switch, and the load/the subsystem.
[0013] In some embodiments, the control unit allows the second battery pack to discharge to the load/the subsystem via the first switch path. The first switch path includes the control unit, the first battery pack, the first BMS, the second battery pack, the second BMS, and the load/the subsystem. the control unit regulates current level of the second battery pack to a third predetermined current level via the second regulation path. The second regulation path includes a second set of a plurality of cells, the fourth pre-charge circuit, the second charge switch, and the load/the subsystem. The control unit allows the second battery pack to discharge power in a fourth predetermined current level to the load/the subsystem via the second supply path. The second supply path includes the second set of the plurality of cells, the second discharge switch, the second charge switch, and the load/the subsystem.

[0014] In some embodiments, the second state includes a third regulation path, a third supply path, a second switch path, a fourth regulation path, and a fourth supply path.
[0015] In some embodiments, the control unit regulates current level of the second battery pack to a fifth predetermined current level and allows the fifth predetermined current level to the load/the subsystem via the third regulation path. The third regulation path includes the second set of the plurality of cells, the third pre-charge circuit, the second charge switch, and the load/the subsystem. The control unit allows a sixth predetermined current level of the second battery pack to the load/the subsystem via the third supply path. The third supply path includes the second set of the plurality of cells, the second discharge switch, the second charge switch, and the load/the subsystem.
[0016] In some embodiments, the control unit allows the first battery pack to discharge to the load/the subsystem via the second switch path. The second switch path includes the control unit, the first battery pack, the first BMS, the second battery pack, the second BMS, and the load/the subsystem. The control unit regulates current level of the first battery pack to a seventh predetermined current level via the fourth regulation path. The fourth regulation path includes the first set of the plurality of cells, the second pre-charge circuit, the first charge switch, and the load/the subsystem. The control unit allows the first battery pack to discharge power in an eighth predetermined current level to the load/the subsystem via the fourth supply path. The fourth supply path includes the first set of the plurality of cells, the first discharge switch, the first charge switch, and the load/the subsystem.
[0017] In some embodiments, the first charge switch, and the second charge switch are configured to avoid short-circuiting issues between the first battery pack, and the second battery pack by passing current in unidirectional.
[0018] In some embodiments, the first predetermined current level, the third predetermined current level, the fifth predetermined current level, and the seventh predetermined current level are lower than the second predetermined current level, the fourth predetermined current level, the sixth predetermined current level, and the eighth predetermined current level.
[0019] In some embodiments, the first predetermined current level, the second predetermined current level, the third predetermined current level, the fourth predetermined current level, the fifth predetermined current level, the sixth predetermined current level, the seventh predetermined current level, and the eighth predetermined current level varies based on the load/the sub-system requirements.
[0020] In some embodiments, the first pre-charge circuit, the second pre-charge circuit, the first discharge switch, and the first charge switch are controlled and operated by the first BMS and the control unit. The third pre-charge circuit, the fourth pre-charge circuit, the second discharge switch, and the second charge switch are controlled and operated by the second BMS and the control unit.
[0021] In some embodiments, the SOC of the first battery pack and the SOC of the second battery pack vary based on the first predetermined capacity and the second predetermined capacity of the first battery pack, and the second battery pack.
[0022] In some embodiments, the first pre-charge circuit, and the third pre-charge circuit are functionally identical and commonized. The second pre-charge circuit and the fourth pre-charge circuit are functionally identical and commonized.
[0023] In some embodiments, the system further includes a regulative pre-charge circuit to avoid inrush in a broad range. The regulative pre-charge circuit includes one or more the first pre-charge circuit or the third pre-charge circuit and the second pre-charge circuit, and the fourth pre-charge circuit.
[0024] In another aspect, a method for managing usage of a plurality of battery packs in a vehicle is provided. The method includes distributing, by a first battery pack with a first predetermined capacity, power to the vehicle till a first predetermined SOC level. The first battery pack includes a first BMS. The first BMS includes includes a first pre-charge circuit, a second pre-charge circuit, a first discharge switch, and a first charge switch.
[0025] The method includes distributing, by a second battery pack with a second predetermined capacity, power to the vehicle till a second predetermined SOC level. The second battery pack includes a second BMS. The second BMS includes a third pre-charge circuit, a fourth pre-charge circuit, a second discharge switch, and a second charge switch.
[0026] The method includes turning, by a first state, the vehicle from idle to running using the first battery pack. The first state includes a first regulation path, a first supply path, a first switch path, a second regulation path, and a second supply path.
[0027] The method includes switching, by a control unit, power distribution of the vehicle from the first battery pack to the second battery pack when the SOC of the first battery pack is discharged to the first predetermined SOC level by sending a first set of control signals to the first BMS and the second BMS from the control unit.
[0028] The method includes turning, by a second state, the vehicle from idle to running using the second battery pack. The second state includes a third regulation path, a third supply path, a second switch path, a fourth regulation path, and a fourth supply path.
[0029] The method includes switching, by the controller unit, power distribution of the vehicle from the second battery pack to the first battery pack when the SOC of the second battery pack is discharged to the second predetermined SOC level by sending a second set of control signals to the first BMS and the second BMS from the control unit.
[0030] In some embodiments, the method further includes regulating, by the control unit, current level of the first battery pack to a first predetermined current level. The method includes allowing, by the control unit, the first predetermined current level of the first battery pack to the load/the subsystem via the first regulation path. The first regulation path includes a first set of a plurality of cells, the first pre-charge circuit, the first charge switch, and the load/the subsystem.
[0031] The method includes allowing, by the control unit, a second predetermined current level of the first battery pack to the load/the subsystem via the first supply path. The first supply path includes the first set of the plurality of cells, the first discharge switch, the first charge switch, and the load/the subsystem.
[0032] The method includes allowing, by the control unit, the second battery pack to discharge to the load/the subsystem by the control unit via the first switch path. The first switch path includes the control unit, the first battery pack, the first BMS, the second battery pack, the second BMS, and the load/the subsystem.
[0033] The method includes regulating, by the control unit, current level of the second battery pack to a third predetermined current level via the second regulation path. The second regulation path includes a second set of a plurality of cells, the fourth pre-charge circuit, the second charge switch, and the load/the subsystem. The method includes allowing, by the control unit, the second battery pack to discharge power in a fourth predetermined current level to the load/the subsystem via the second supply path. The second supply path includes the second set of the plurality of cells, the second discharge switch, the second charge switch, and the load/the subsystem.
[0034] In some embodiments, the method further includes regulating, by the control unit, current level of the second battery pack to a fifth predetermined current level. The method includes allowing, by the control unit, the fifth predetermined current level to the load/the subsystem via the third regulation path. The third regulation path includes the second set of the plurality of cells, the third pre-charge circuit, the second charge switch, and the load/the subsystem. The method includes allowing, by the third supply path, a sixth predetermined current level of the second battery pack to the load/the subsystem via the third supply path. The third supply path includes the second set of the plurality of cells, the second discharge switch, the second charge switch, and the load/the subsystem. The method includes allowing, by the control unit, the first battery pack to discharge to the load/the subsystem via the second switch path. The second switch path includes the control unit, the first battery pack, the first BMS, the second battery pack, the second BMS, and the load/the subsystem. The method includes regulating, by the control unit, current level of the first battery pack to a seventh predetermined current level via the fourth regulation path. The fourth regulation path includes the first set of the plurality of cells, the second pre-charge circuit, the first charge switch, and the load/the subsystem. The method includes allowing, by the control unit, the first battery pack to discharge power in an eighth predetermined current level to the load/the subsystem via the fourth supply path. The fourth supply path includes the first set of the plurality of cells, the first discharge switch, the first charge switch, and the load/the subsystem.
[0035] In some embodiments, the method further includes passing, using the first charge switch, and the second charge switch, current in unidirectional to avoid short-circuit issues between the first battery pack and the second battery pack.
[0036] In some embodiments, the first predetermined current level, the third predetermined current level, the fifth predetermined current level, and the seventh predetermined current level are lower than the second predetermined current level, the fourth predetermined current level, the sixth predetermined current level, and the eighth predetermined current level.
[0037] In some embodiments, the first predetermined current level, the second predetermined current level, the third predetermined current level, the fourth predetermined current level, the fifth predetermined current level, the sixth predetermined current level, the seventh predetermined current level, and the eighth predetermined current level varies based on the load/the sub-system requirements.
[0038] In some embodiments, the first pre-charge circuit, the second pre-charge circuit, the first discharge switch, and the first charge switch are controlled and operated by the first BMS and the control unit. The third pre-charge circuit, the fourth pre-charge circuit, the second discharge switch, and the second charge switch are controlled and operated by the second BMS and the control unit.
[0039] In some embodiments, the SOC of the first battery pack and the SOC of the second battery pack varies based on the first predetermined capacity and the second predetermined capacity of the first battery pack, and the second battery pack.
[0040] In some embodiments, the first pre-charge circuit, and the third pre-charge circuit are functionally identical and commonized. The second pre-charge circuit, and the fourth pre-charge circuit are functionally identical and commonized.
[0041] In some embodiments, the method further includes a regulative pre-charge circuit to avoid inrush in a broad range. The regulative pre-charge circuit includes one or more the first pre-charge circuit or the third pre-charge circuit and the second pre-charge circuit, and the fourth pre-charge circuit.
[0042] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating preferred embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein, and the embodiments herein include all such modifications.
BRIEF DESCRIPTION OF FIGURES
[0043] The embodiments herein will be better understood from the following detailed description with reference to the drawings, in which:
[0044]
[0045] FIG. 1 illustrates high level block diagram of a system to manage usage of a plurality of battery packs, according to the embodiments as disclosed herein
[0046] FIG. 2 illustrates the system to manage usage of the plurality of battery packs, according to the embodiments as disclosed herein;
[0047] FIG. 3 illustrates the system to manage usage of the plurality of battery packs with an initial state pre-charge circuit, and a transition state pre-charge circuit, according to the embodiments as disclosed herein;
[0048] FIG. 4 illustrates the system to manage usage of the plurality of battery packs with a regulative pre-charge circuit, according to the embodiments as disclosed herein; and
[0049] FIG. 5 illustrates a method for managing usage of the plurality of battery packs, according to the embodiments as disclosed herein.
[0050] It may be noted that to the extent possible, like reference numerals have been used to represent like elements in the drawing. Further, those of ordinary skill in the art will appreciate that elements in the drawing are illustrated for simplicity and may not have been necessarily drawn to scale. For example, the dimension of some of the elements in the drawing may be exaggerated relative to other elements to help to improve the understanding of aspects of the invention. Furthermore, the elements may have been represented in the drawing by conventional symbols, and the drawings may show only those specific details that are pertinent to the understanding of the embodiments of the invention so as not to obscure the drawing with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.
DETAILED DESCRIPTION OF INVENTION
[0051] In the following description, for the purposes of explanation, various specific details are set forth in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent, however, that embodiments of the present disclosure may be practiced without these specific details. Several features described hereafter can each be used independently of one another or with any combination of other features. An individual feature may not address all of the problems discussed above or might address only some of the problems discussed above. Some of the problems discussed above might not be fully addressed by any of the features described herein.
[0052] The ensuing description provides exemplary embodiments only and is not intended to limit the scope, applicability, or configuration of the disclosure. Rather, the ensuing description of the exemplary embodiments will provide those skilled in the art with an enabling description for implementing an exemplary embodiment. It should be understood that various changes may be made in the function and arrangement of elements without departing from the spirit and scope of the disclosure as set forth.
[0053] The word “exemplary” and/or “demonstrative” is used herein to mean serving as an example, instance, or illustration. For the avoidance of doubt, the subject matter disclosed herein is not limited by such examples. In addition, any aspect or design described herein as “exemplary” and/or “demonstrative” is not necessarily to be construed as preferred or advantageous over other aspects or designs, nor is it meant to preclude equivalent exemplary structures and techniques known to those of ordinary skill in the art. Furthermore, to the extent that the terms “includes,” “has,” “contains,” and other similar words are used in either the detailed description or the claims, such terms are intended to be inclusive—in a manner similar to the term “comprising” as an open transition word—without precluding any additional or other elements.
[0054] Reference throughout this specification to “one embodiment” or “an embodiment” or “an instance” or “one instance” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0055] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
[0056] The accompanying drawings are used to help easily understand various technical features and it should be understood that the embodiments presented herein are not limited by the accompanying drawings. As such, the present disclosure should be construed to extend to any alterations, equivalents, and substitutes in addition to those which are particularly set out in the accompanying drawings. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are generally only used to distinguish one element from another.
[0057] Accordingly, embodiments herein disclose a system and a method for managing the usage of the plurality of battery packs. The system includes a plurality of battery packs, a control unit, a first state, and a second state. The plurality of battery packs includes a first battery pack with a first predetermined capacity and a second battery pack with a second predetermined capacity. first battery pack distributes power to the vehicle till a first predetermined SOC level. The first battery pack includes a first Battery Management System (BMS). The first BMS includes a first pre-charge circuit, a second pre-charge circuit, a first discharge switch, and a first charge switch. The second battery pack distributes power to the vehicle till a second predetermined SOC level. The second battery pack includes a second BMS. The second BMS includes a third pre-charge circuit, a fourth pre-charge circuit, a second discharge switch, and a second charge switch. The first state turns the vehicle on from idle to run using the first battery pack. The first state switches power distribution from the first battery pack to the second battery pack when the SOC of the first battery pack is discharged to the first predetermined SOC level by sending a first set of control signals to the first BMS and the second BMS from the control unit. The second state turns the vehicle on from idle to run using the second battery pack. The second state switches power distribution from the second battery pack to the first battery pack when the SOC of the second battery pack is discharged to the second predetermined SOC level by sending a second set of control signals to the first BMS and the second BMS from the control unit.
[0058] Referring now to the drawings, and more particularly to FIGS. 1 to 5 where similar reference characters denote corresponding features consistently throughout the figures, there are shown preferred embodiments.
[0059] FIG. 1 illustrates a high-level architecture of a system 100 for managing usage of a plurality of battery packs 102, according to embodiments as disclosed herein. Referring to FIG.1, the system 100 includes the plurality of battery packs 102, a control unit 106, a Direct Current-Direct Current (DC-DC) converter 108, a load/a subsystem 110, a load control unit 112, and a display unit 114. In an embodiment, the system 100 includes one or more loads/ one or more subsystems 110.
[0060] The plurality of battery packs 102 may include, but not limited to, a first battery pack 102A with a first predetermined capacity and a second battery pack 102B with a second predetermined capacity. In one embodiment, the first predetermined capacity and the second predetermined capacity may be varied based on the capacity of the plurality of battery packs 102. In another embodiment, the capacity of the plurality of battery packs 102 may be varied based on the application in which the system will be used. The plurality of battery packs 102 includes a plurality of Battery Management System (BMS) 104. The first battery pack 102A includes a first BMS 104A (as shown in figure 2). The second battery pack 102A includes a second BMS 104B. In yet another embodiment, the first battery pack 102A includes the first BMS 104A. The second battery pack 102B includes the second BMS 104B (as shown in figure 2).
[0061] In yet another embodiment, the first battery pack 102A may be a fixed battery pack. In yet another embodiment, the first battery pack 102A may be a portable battery pack. In yet another embodiment, the second battery pack 102B may be the portable battery pack. In yet another embodiment, the second battery pack 102B may be the fixed battery pack. In yet another embodiment, the first battery pack 102A and the second battery pack 102B both may be portable battery packs. In yet another embodiment, the first battery pack 102A and the second battery pack 102B both may be fixed battery packs. In yet another embodiment, the first battery pack 102A may have a bigger capacity than the second battery pack 102B. In yet another embodiment, the first battery pack 102A may have lesser capacity than the second battery pack 102B.
[0062] The first battery pack 102A distributes power to a vehicle till a first predetermined SOC level. The second battery pack 102B distributes the power to the vehicle till a second predetermined SOC level. In another embodiment, the vehicle may include, but not limited to, a Battery Electric Vehicle (BEV), a Hybrid Electric vehicle (HEV), a Plug-In Hybrid Electric Vehicle (PHEV), and a Fuel Cell Electric Vehicle (FCEV).
[0063] The power distribution of the vehicle is switched from the first battery pack 102A to the second battery pack 102B when the first battery pack 102A is discharged to the first predetermined SOC level. The first BMS 104A is configured to measure a first set of parameters of the first battery pack 102A. In one embodiment, the first set of parameters of the first battery pack 102A may include, but not limited to, a temperature level of the first battery pack 102A, a pressure level of the first battery pack 102A, one or more operational modes of the first battery pack 102A, and the SOC level of the first battery pack 102A.
[0064] The power distribution of the vehicle is switched from the second battery pack 102B to the first battery pack 102A when the second battery pack 102B is discharged to the second predetermined SOC level. The second BMS 104B is configured to measure a second set of parameters of the second battery pack 102B. In one embodiment, the second set of parameters of the second battery pack 102B may include, but not limited to, a temperature level of the second battery pack 102B, a pressure level of the second battery pack 102B, one or more operational modes of the second battery pack 102B and the SOC level of the second battery pack 102B.
[0065] The control unit 106 is configured to receive the first set of parameters of the first battery pack 102A, and the second set of parameters of the second battery pack 102B from the first BMS 104A, and the second BMS 104B to perform a switching process. As used herein, the control unit 106 is defined as a unit/system that is responsible for monitoring and controlling one or more electronic accessories in the vehicle’s body. In an embodiment, the control unit 106 may include, but not limited to, a Body Control Module (BCM), and a Body Control Unit) BCU.
[0066] In the switching process, the power distribution of the vehicle is switched from the first battery pack 102A to the second battery pack 102B when the first battery pack 102A is discharged to the first predetermined SOC level. In another embodiment, the power distribution of the vehicle is switched from the second battery pack 102B to the first battery pack 102A when the second battery pack 102A is discharged to the second predetermined SOC level. In one embodiment, the control unit 106 is configured to process the first set of parameters from the first BMS 104A, and the second set of parameters from the second BMS 104B.
[0067] The control unit 106 is configured to transmit one or more signals to the first battery pack 102A and the second battery pack 102B through a Controller Area Network (CAN) communication. In one embodiment, the control unit 106 is configured to transmit one or more signals to the first battery pack 102A and the second battery pack 102B through wireless CAN, MOST, FlexRay, and Automotive Ethernet. In another embodiment, the control unit 106 is configured to transmit one or more signals to the first BMS 104A of the first battery pack 102A and the second BMS 104B of the second battery pack 102B through a Controller Area Network (CAN) communication. In yet another embodiment, the one or more signals may include, but not limited to, a command that is related to the switching operation. As used herein, the CAN is defined as a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other.
[0068] The DC-DC converter 108 is configured to convert input DC voltage to desired output DC voltage for powering one or more peripheral devices, and the load 110. In an embodiment, the one or more peripheral devices may include, but not limited to an LED, a charger, the control unit 106, the display unit 114, and the load control unit 112. As used herein, the DC-DC converter 108 is an electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another.
[0069] The display unit 114 is configured to display one or more statuses of the vehicle to a user. In an embodiment, the one or more statuses may include, but not limited to a fully charged state of the plurality of battery packs 102, the SOC of the plurality of battery packs 102, and a State of Health (SOH) of the plurality of battery packs 102, an increased temperature level of the plurality of battery packs 102, an increased pressure level of the plurality of battery packs 102 and an increased voltage and current levels of the plurality of battery packs 102.
[0070] The load/ subsystem 110 is configured to convert electrical energy into mechanical energy to propel the vehicle by using the load control unit 112. In an embodiment, the load/the subsystem 110 may include, but not limited to a motor. The load control unit 112 is configured to control and manage one or more operational modes of the load/the subsystem 110 by varying one or more parameters. In one embodiment, the one or more parameters include, but not limited to, voltage, current, or, a combination of both. In one embodiment, the load control unit 112 acts as an interface between the load/the subsystem 110 and the plurality of battery packs 102. As used herein, the motor is defined as a device that generates the rotational force required to drive one or more wheels and move the vehicle forward.
[0071] FIG. 2 illustrates a system 200 to manage usage of the plurality of battery packs 102, according to the embodiments as disclosed herein. The system 200 includes the plurality of battery packs 102. The plurality of battery packs 102 may include, but not limited to the first battery pack 102A with a first predetermined capacity, and the second battery pack 102B with a second predetermined capacity. In one embodiment, the first predetermined capacity and the second predetermined capacity may be varied based on the capacity of the first battery pack 102A, and the second battery pack 102B. In one embodiment, the capacity of the first battery pack 102A, and the second battery pack 102B may be varied based on the application in which the system 200 will be used.
[0072] In one embodiment, the first battery pack 102A may be the fixed battery pack. In another embodiment, the first battery pack 102A may be a portable battery pack. In one embodiment, the second battery pack 102B may be the portable battery pack. The second battery pack 102B may be the fixed battery pack. In yet another embodiment, the first battery pack 102A and the second battery pack 102B both may be fixed battery packs. In yet another embodiment, the first battery pack 102A may have a bigger capacity than the second battery pack 102B. In yet another embodiment, the first battery pack 102A may have lesser capacity than the second battery pack 102B.
[0073] The first battery pack 102A includes the first Battery Management System (BMS) 104A, a first set of a plurality of cells 202, a first positive terminal 21a, and a first negative terminal 212B. The first BMS 104A includes a first pre-charge circuit 204, a second pre-charge circuit 206, a first discharge switch 208, and a first charge switch 210. In one embodiment, the first pre-charge circuit 204 and the second pre-charge circuit 206 may include but not limited to, one or more switches, and one or more limiting elements. In another embodiment, the limiting element may include, but not limited to, a resistor. In yet another embodiment, the one or more switches of the first pre-charge circuit 204, & the second pre-charge circuit 206, the first discharge switch 208, and the first charge switch 210 may include, but not limited to, electronic switches may be MOSFETs, FETs, or any voltage control devices.
[0074] The second battery pack 102B includes the second Battery Management System (BMS) 104B, a second set of a plurality of cells 214, a second positive terminal 224A, and a second negative terminal 224B. The second BMS 104B includes a third pre-charge circuit 216, a fourth pre-charge circuit 218, a second discharge switch 220, and a second charge switch 222. In one embodiment, the third pre-charge circuit 216, and the fourth pre-charge circuit 218 may include but not limited to, one or more switches, and one or more limiting elements. In another embodiment, the limiting element may include, but not limited to, a resistor. In yet another embodiment, the one or more switches of the third pre-charge circuit 216 & fourth pre-charge circuit 218, the second discharge switch 220, and the second charge switch 222 may include, but not limited to, electronic switches may be MOSFETs, FETs, or any voltage control devices.
[0075] The system further includes a first state and a second state. The first state of the system 100 turns the vehicle on from idle to run using the first battery pack 102A. The first state switches power distribution from the first battery pack 102A to the second battery pack 102B when the SOC of the first battery pack 102A is discharged to the first predetermined SOC level by sending a first set of control signals to first BMS 104A and the second BMS 104B from the control unit 106.
[0076] The second state turns the vehicle on from idle to run using the second battery pack 102B. The second state switches the power distribution from the second battery pack 102B to the first battery pack 102A when the SOC of the second battery pack 102B is discharged to the second predetermined SOC level by sending a second set of control signals to first BMS 104A and the second BMS 104B from the control unit 106.
[0077] The first state includes a first regulation path, a first supply path, a first switch path, a second regulation path, and a second supply path. The control unit 106 regulates current level of the first battery pack 102A to a first predetermined current level and allows the first predetermined current level of the first battery pack 102A via the first regulation path. The first regulation path includes the first set of a plurality of cells 202, the first pre-charge circuit 204, the first charge switch 210, and the load/the subsystem 110. The control unit 106 allows a second predetermined current level of the first battery pack 102A to the load/the subsystem 110 via the first supply path. The first supply path includes the first set of the plurality of cells 202, the first discharge switch 208, the first charge switch 210, and the load/the subsystem 110.
[0078] The control unit 106 allows the second battery pack 102B to discharge to the load/the subsystem 110 via the first switch path. The first switch path includes the control unit 106, the first battery pack 102A, the first BMS 104A, the second battery pack 102B, the second BMS 104B, and the load/the subsystem 110. The control unit 106 regulates current level of the second battery pack 102B to a third predetermined current level via the second regulation path. The second regulation path includes a second set of a plurality of cells 214, the fourth pre-charge circuit 218, the second charge switch 222, and the load/the subsystem 110. The control unit 106 allows the second battery pack 102B to discharge power in a fourth predetermined current level to the load/the subsystem 110 via the second supply path. The second supply path comprises the second set of the plurality of cells 214, the second discharge switch 220, the second charge switch 222, and the load/the subsystem 110.
[0079] The second state includes a third regulation path, a third supply path, a second switch path, a fourth regulation path, and a fourth supply path. The control unit 106 regulates current level of the second battery pack 102B to a fifth predetermined current level and allows the fifth predetermined current level to the load/the subsystem 110 via the third regulation path. The third regulation path includes the second set of the plurality of cells 214, the third pre-charge circuit 216, the second charge switch 222, and the load/the subsystem 110. The control unit 106 allows a sixth predetermined current level of the second battery pack 102A to the load/the subsystem 110 via the third supply path. The third supply path includes the second set of the plurality of cells 214, the second discharge switch 220, the second charge switch 222, and the load/the subsystem 110.
[0080] The control unit 106 allows the first battery pack 102A to discharge to the load/the subsystem 110 via the second switch path. The second switch path includes the control unit 106, the first battery pack 102A, the first BMS 104A, the second battery pack 102B, the second BMS 104B, and the load/the subsystem 110. The control unit 106 regulates current level of the first battery pack 102A to a seventh predetermined current level via the fourth regulation path. The fourth regulation path includes the first set of the plurality of cells 202, the second pre-charge circuit 206, the first charge switch 210, and the load/the subsystem 110. The control unit 106 allows the first battery pack 102A to discharge power in an eighth predetermined current level to the load/the subsystem 110 via the fourth supply path. The fourth supply path includes the first set of the plurality of cells 202, the first discharge switch 208, the first charge switch 210, and the load/the subsystem 110.
[0081] The first charge switch 210, and the second charge switch 222 are configured to avoid short-circuiting issues between the first battery pack 102A, and the second battery pack 102B by passing current in unidirectional. In one embodiment, the control unit 106 allows the unidirectional current flow to avoid short-circuiting issues between the first battery pack 102A, and the second battery pack 102B using a unidirectional device. The unidirectional device is positioned inside the first charge switch 210, and the second charge switch 222. In one embodiment the unidirectional device may include, but not limited to, a diode, or Thyristor.
[0082] In one embodiment, the first predetermined current level, the third predetermined current level, the fifth predetermined current level, and the seventh predetermined current level are lower than the second predetermined current level, the fourth predetermined current level, the sixth predetermined current level, and the eighth predetermined current level. In another embodiment, the first predetermined current level, the third predetermined current level, the fifth predetermined current level, and the seventh predetermined current level are lower than the second predetermined current level, the fourth predetermined current level, the sixth predetermined current level, and the eighth predetermined current level may vary based on the application in which the system 200 is used.
[0083] In one embodiment, the first predetermined current level, the second predetermined current level, the third predetermined current level, the fourth predetermined current level, the fifth predetermined current level, the sixth predetermined current level, the seventh predetermined current level, and the eighth predetermined current level varies based on the load/the sub-system requirements.
[0084] In one embodiment, the first pre-charge circuit 204, the second pre-charge circuit 206, the first discharge switch 208, and first charge switch 210 are controlled and operated by the first BMS 104A, and the control unit 106. The third pre-charge circuit 216, the fourth pre-charge circuit 218, the second discharge switch 220, and the second charge switch 222 are controlled and operated by the second BMS 104B and the control unit 106.
[0085] In one embodiment, the SOC of the first battery pack 102A and the SOC of the second battery pack 102B varies based on the first predetermined capacity and the second predetermined capacity of the first battery pack 102A, and the second battery pack 102B.
[0086] FIG. 3 illustrates the system 100, 200 to manage usage of the plurality of battery packs 102 with an initial state pre-charge circuit 302, and a transition state pre-charge circuit 304, according to the embodiments as disclosed herein. The initial state pre-charge circuit 302, and transition state pre-charge circuit 304. The initial state pre-charge circuit 302 to limit inrush current when the vehicle turns on from the idle to run. The initial state pre-charge circuit 302 includes at least one of the first pre-charge circuit 204, and the third pre-charge circuit 216. In addition to that, the system 100 includes a transition state pre-charge circuit 304 to limit inrush current when the control unit 106 switches power distribution from the first battery pack 102A to the second battery pack 102B. The transition state pre-charge circuit 304 includes at least one of the second pre-charge circuit 206, and the fourth pre-charge circuit 218.
[0087] FIG. 4 illustrates the system 100, 200 to manage usage of the plurality of battery packs 102 with a regulative pre-charge circuit 402, according to the embodiments as disclosed herein. The system 100, 200 include a regulative pre-charge circuit 402 to limit the inrush current when the vehicle turns on from the idle to run, and when the control unit 106 switches power distribution from the first battery pack 102A to the second battery pack 102B. The regulative pre-charge circuit 402 includes the initial state pre-charge circuit 302, and the transition state pre-charge circuit 304 to limit inrush current.
[0088] FIG. 5 illustrates a method 500 for managing usage of the plurality of battery packs 102, according to the embodiments as disclosed herein.
[0089] At step 502, distributing, by a first battery pack 102A with a first predetermined capacity, power to the vehicle till a first predetermined SOC level. In one embodiment, the first battery pack 102A includes a first predetermined capacity, and the second battery pack 102B includes a second predetermined capacity. In one embodiment, the first predetermined capacity and the second predetermined capacity may be varied based on the capacity of the first battery pack 102A, and the second battery pack 102B. In one embodiment, the capacity of the first battery pack 102A, and the second battery pack 102B may be varied based on the application in which the system 200 will be used.
[0090] In one embodiment, the first battery pack 102A may be the fixed battery pack. In another embodiment, the first battery pack 102A may be a portable battery pack. In one embodiment, the second battery pack 102B may be the portable battery pack. The second battery pack 102B may be the fixed battery pack. In yet another embodiment, the first battery pack 102A and the second battery pack 102B both may be fixed battery packs. In yet another embodiment, the first battery pack 102A may have a bigger capacity than the second battery pack 102B. In yet another embodiment, the first battery pack 102A may have lesser capacity than the second battery pack 102B.
[0091] The first battery pack 102A includes the first Battery Management System (BMS) 104A, a first set of a plurality of cells 202, a first positive terminal 212A, and a first negative terminal 212B. The first BMS 104A includes the first pre-charge circuit 204, the second pre-charge circuit 206, the first discharge switch 208, and the first charge switch 210. In one embodiment, the first pre-charge circuit 204 and the second pre-charge circuit 206 may include but not limited to, one or more switches, and one or more limiting elements. In another embodiment, the limiting element may include, but not limited to, a resistor. In yet another embodiment, the one or more switches of the first pre-charge circuit 204, & the second pre-charge circuit 206, the first discharge switch 208, and the first charge switch 210 may include, but not limited to, electronic switches may be MOSFETs, FETs, or any voltage control devices.
[0092] The second battery pack 102B includes the second Battery Management System (BMS) 104B, a second set of a plurality of cells 214, a second positive terminal 224A, and a second negative terminal 224B. The second BMS 104B includes a third pre-charge circuit 216, a fourth pre-charge circuit 218, a second discharge switch 220, and a second charge switch 222. In one embodiment, the third pre-charge circuit 216, and the fourth pre-charge circuit 218 may include but not limited to, one or more switches, and one or more limiting elements. In another embodiment, the limiting element may include, but not limited to, a resistor. In yet another embodiment, the one or more switches of the third pre-charge circuit 216 & fourth pre-charge circuit 218, the second discharge switch 220, and the second charge switch 222 may include, but not limited to, electronic switches may be MOSFETs, FETs, or any voltage control devices.
[0093] At step 504, distributing, by a second battery pack 102B with a second predetermined capacity, power to the vehicle till a second predetermined SOC level. The second battery pack 102B includes a second BMS. The second BMS 104B includes a third pre-charge circuit 216, a fourth pre-charge circuit 218, a second discharge switch 220, and a second charge switch 222.
[0094] At step 506, turning, by a first state, the vehicle on from an idle-to-run using the first battery pack 102A, wherein the first state comprises a first regulation path, a first supply path, a first switch path, a second regulation path, and a second supply path.
[0095] At step 508, switching, by a control unit 106, power distribution of the vehicle from the first battery pack 102A to the second battery pack 102B when the SOC of the first battery pack 102A is discharged to the first predetermined SOC level by sending a first set of control signals to the first BMS 104A and the second BMS 104B from the control unit 106.
[0096] At step 510, turning, by a second state, the vehicle on from an idle-to-run using the second battery pack 102B, wherein the second state comprises a third regulation path, a third supply path, a second switch path, a fourth regulation path, and a fourth supply path.
[0097] At step 512, switching, by the controller unit, the power distribution of the vehicle from the second battery pack 102B to the first battery pack 102A when the SOC of the second battery pack 102B is discharged to the second predetermined SOC level by sending a second set of control signals to the first BMS 104A and the second BMS 104B from the control unit 106.
[0098] In one embodiment, the method 500 further includes regulating, by the control unit 106, current level of the first battery pack 102A to a first predetermined current level. The method 500 includes allowing, by the control unit 106, the first predetermined current level of the first battery pack 102A to the load/the subsystem 110 via the first regulation path. The first regulation path includes the first set of a plurality of cells 202, the first pre-charge circuit 204 the first charge switch 210, and the load/the subsystem 110. The method includes allowing, by the control unit 106, a second predetermined current level of the first battery pack 102A to the load/the subsystem 110 via the first supply path. The first supply path comprises the first set of the plurality of cells 202, the first discharge switch 208, the first charge switch 210, and the load/the subsystem 110. The method includes allowing, by the control unit 106, the second battery pack to discharge to the load/the subsystem 110 by the control unit 106 via the first switch path. The first switch path includes the control unit 106, the first battery pack 102A, the first BMS 104A, the second battery pack 102B, the second BMS 104B, and the load/the subsystem 110.
[0099] The method includes regulating, by the control unit 106, current level of the second battery pack 102B to a third predetermined current level via the second regulation path. The second regulation path includes a second set of a plurality of cells 214, the fourth pre-charge circuit 218, the second charge switch 222, and the load/the subsystem 110.
[00100] The method includes allowing, by the control unit 106, the second battery pack 102B to discharge power in a fourth predetermined current level to the load/the subsystem 110 via the second supply path. The second supply path includes the second set of the plurality of cells 214, the second discharge switch 220, the second charge switch 222, and the load/the subsystem 110.
[00101] In another embodiment, the method further includes regulating, by the control unit 106, current level of the second battery pack 102B to a fifth predetermined current level. The method includes allowing, by the control unit 106, the fifth predetermined current level to the load/the subsystem 110 via the third regulation path. The third regulation path includes the second set of the plurality of cells 214, the third pre-charge circuit 216, the second charge switch 222, and the load/the subsystem 110.
[00102] The method includes allowing, by the third supply path, a sixth predetermined current level of the second battery pack 102A to the load/the subsystem 110 via the third supply path. The third supply path includes the second set of the plurality of cells 214, the second discharge switch 220, the second charge switch 222, and the load/the subsystem 110.
[00103] The method includes allowing, by the control unit 106, the first battery pack 102A to discharge to the load/the subsystem 110 via the second switch path. The second switch path include the control unit 106, the first battery pack 102A, the first BMS 104A, the second battery pack 102B, the second BMS 104B, and the load/the subsystem 110.
[00104] The method includes allowing, regulating, by the control unit 106, current level of the first battery pack 102A to a seventh predetermined current level via the fourth regulation path. The fourth regulation path includes the first set of the plurality of cells 202, the second pre-charge circuit 206, the first charge switch 210, and the load/the subsystem 110.
[00105] The method includes allowing, by the control unit 106, the first battery pack 102A to discharge power in an eighth predetermined current level to the load/the subsystem 110 via the fourth supply path. The fourth supply path includes the first set of the plurality of cells 202, the first discharge switch 208, the first charge switch 210, and the load/the subsystem 110.
[00106] In yet another embodiment, the method 500 further comprises passing, using the first charge switch 210, and the second charge switch 222, current in unidirectional to avoid short-circuit issues between the first battery pack 102A, and the second battery pack 102B. In one embodiment, the control unit 106 allows the unidirectional current flow to avoid short-circuiting issues between the first battery pack 102A, and the second battery pack 102B using a unidirectional device. The unidirectional device is positioned inside the first charge switch 210, and the second charge switch 222. In one embodiment the unidirectional device may include, but not limited to, a diode, or Thyristor.
[00107] In yet another embodiment, the first predetermined current level, the third predetermined current level, the fifth predetermined current level, and the seventh predetermined current level are lower than the second predetermined current level, the fourth predetermined current level, the sixth predetermined current level, and the eighth predetermined current level. In another embodiment, the first predetermined current level, the third predetermined current level, the fifth predetermined current level, and the seventh predetermined current level are lower than the second predetermined current level, the fourth predetermined current level, the sixth predetermined current level, and the eighth predetermined current level may vary based on the application in which the system 200 is used.
[00108] In yet another embodiment, the first predetermined current level, the second predetermined current level, the third predetermined current level, the fourth predetermined current level, the fifth predetermined current level, the sixth predetermined current level, the seventh predetermined current level, and the eighth predetermined current level varies based on the load/the sub-system requirements.
[00109] In yet another embodiment, the first pre-charge circuit 204, the second pre-charge circuit 206, the first discharge switch 208, and the first charge switch 210 are controlled, and operated by the first BMS 104A, and the control unit 106. The third pre-charge circuit 216, the fourth pre-charge circuit 218, the second discharge switch 220, and the second charge switch 222 are controlled and operated by the second BMS 104B and the control unit 106.
[00110] In yet another embodiment, the SOC of the first battery pack 102A and the SOC of the second battery pack 102B varies based on the first predetermined capacity and the second predetermined capacity of the first battery pack 102A, and the second battery pack 102B.
[00111] In yet another embodiment, the method 500 includes an initial state pre-charge circuit 302 to limit inrush current when the vehicle turns on from the idle to run. The initial state pre-charge circuit 302 includes at least one of the first pre-charge circuit 204, and the third pre-charge circuit 216. The method 500 further includes a transition state pre-charge circuit 304 to limit inrush current when the control unit 106 switches power distribution from the first battery pack 102A to the second battery pack 102B. The transition state pre-charge circuit 304 includes at least one of the second pre-charge circuit 206, and the fourth pre-charge circuit 218.
[00112] In yet another embodiment, the method 500 further includes a regulative pre-charge circuit 402 to limit inrush. The regulative pre-charge circuit 402 includes the initial state pre-charge circuit 302, and the transition state pre-charge circuit 304 to limit inrush current.
[00113] The proposed system 100 provides smooth switching technique to switch power distribution from the first battery pack 102A to the second battery pack 102B, or the second battery pack 102B to the first battery pack 102A.
[00114] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the appended claims. Improvements and modifications may be incorporated herein without deviating from the scope of the invention.

LIST OF REFERENCE NUMERALS
High-level architecture of a system - 100.
Plurality of battery packs - 102.
First battery pack -102A.
Second battery pack - 102B.
First BMS - 104A.
Second BMS - 104B.
Control unit - 106.
DC - DC converter - 108.
Load/subsystem - 110.
Load control unit - 112.
Display unit - 114.
Block diagram of the system - 200.
First set of a plurality of cells - 202.
First pre-charge circuit - 204.
Second pre-charge circuit - 206.
First discharge switch - 208.
First charge switch - 210.
First positive terminal - 212A.
First negative terminal - 212B.
Second set of a plurality of cells - 214.
Third pre-charge circuit - 216.
Fourth pre-charge circuit - 218.
Second discharge switch - 220.
Second charge switch - 222.
Second positive terminal - 224A
Second negative terminal - 224B.

,CLAIMS:CLAIMS
I/We claim:
1. A system (200) for managing usage of a plurality of battery packs (102) in a vehicle, comprising:
the plurality of battery packs (102) comprises:
a first battery pack (102A) with a first predetermined capacity is configured to distribute power to the vehicle till a first predetermined SOC level, wherein the first battery pack (102A) comprises a first Battery Management System (BMS) (104A), wherein the first BMS (104A) comprises a first pre-charge circuit (204), a second pre-charge circuit (206), a first discharge switch (208), and a first charge switch (210); and
a second battery pack (102B) with a second predetermined capacity is configured to distribute power to the vehicle till a second predetermined SOC level, wherein the second battery pack (102B) comprises a second BMS (104B), wherein the second BMS (104B) comprises a third pre-charge circuit (216), a fourth pre-charge circuit (218), a second discharge switch (220), and a second charge switch (222);
a first state turns the vehicle on from an idle-to-run using the first battery pack (102A), wherein the first state switches power distribution from the first battery pack (102A) to the second battery pack (102B) when the SOC of the first battery pack (102A) is discharged to the first predetermined SOC level by sending a first set of control signals to the first BMS (104A) and the second BMS (104B) from a control unit (106); and
a second state turns the vehicle on from an idle-to-run using the second battery pack (102B), wherein the second state switches the power distribution from the second battery pack (102B) to the first battery pack (102A) when the SOC of the second battery pack (102B) is discharged to the second predetermined SOC level by sending a second set of control signals to the first BMS (104A) and the second BMS (104B) ) from the control unit (106).

2. The system (200) as claimed in claim 1, wherein the first state comprises a first regulation path, a first supply path, a first switch path, a second regulation path, and a second supply path.
3. The system (200) as claimed in claims 1 & 2, wherein the control unit (106) regulates current level of the first battery pack (102A) to a first predetermined current level and allows the first predetermined current level of the first battery pack (102A) via the first regulation path, wherein the first regulation path comprises a first set of a plurality of cells (202), the first pre-charge circuit (204), the first charge switch (210), and the load/the subsystem (110), wherein the control unit (106) allows a second predetermined current level of the first battery pack (102A) to the load/the subsystem (110) via the first supply path, wherein the first supply path comprises the first set of the plurality of cells (202), the first discharge switch (208), the first charge switch (210), and the load/the subsystem (110).
4. The system (200) as claimed in claim 1 & 2, wherein the control unit (106) allows the second battery pack 102B to discharge to the load/the subsystem (110) via the first switch path, wherein the first switch path comprises the control unit (106), the first battery pack (102A), the first BMS (104A), the second battery pack (102B), the second BMS (104B), and the load/the subsystem (110), wherein the control unit (106) regulates current level of the second battery pack (102B) to a third predetermined current level via the second regulation path, wherein the second regulation path comprises a second set of a plurality of cells (214), the fourth pre-charge circuit (218), the second charge switch (222), and the load/the subsystem (110), wherein the control unit (106) allows the second battery pack (102B) to discharge power in a fourth predetermined current level to the load/the subsystem (110) via the second supply path, wherein the second supply path comprises the second set of the plurality of cells (214), the second discharge switch (220), the second charge switch (222), and the load/the subsystem (110).

5. The system (200) as claimed in claim 1, wherein the second state comprises a third regulation path, a third supply path, a second switch path, a fourth regulation path, and a fourth supply path.
6. The system (200) as claimed in claims 1 & 5, wherein the control unit (106) regulates current level of the second battery pack (102B) to a fifth predetermined current level and allows the fifth predetermined current level to the load/the subsystem (110) via the third regulation path, wherein the third regulation path comprises the second set of the plurality of cells (214), the third pre-charge circuit (216), the second charge switch (222), and the load/the subsystem (110), wherein the control unit (106) allows a sixth predetermined current level of the second battery pack (102B) to the load/the subsystem (110) via the third supply path, wherein the third supply path comprises the second set of the plurality of cells (214), the second discharge switch (220), the second charge switch (222), and the load/the subsystem (110).
7. The system (200) as claimed in claim 1 & 5, wherein the control unit (106) allows the first battery pack (102A) to discharge to the load/the subsystem (110) via the second switch path, wherein the second switch path comprises the control unit 106, the first battery pack 102A, the first BMS 104A, the second battery pack 102B, the second BMS 104B, and the load/the subsystem (110), wherein the control unit (106), regulates current level of the first battery pack (102A) to a seventh predetermined current level via the fourth regulation path, wherein the fourth regulation path comprises the first set of the plurality of cells (202), the second pre-charge circuit (206), the first charge switch (210), and the load/the subsystem (110), wherein the control unit (106) allows the first battery pack (102A) to discharge power in an eighth predetermined current level to the load/the subsystem (110) via the fourth supply path, wherein the fourth supply path comprises the first set of the plurality of cells (202), the first discharge switch (208), the first charge switch (210), and the load/the subsystem (110).
8. The system (200) as claimed in claim 1, wherein the first charge switch (210), and the second charge switch (222) are configured to avoid short-circuiting issues between the first battery pack (102A), and the second battery pack (102B) by passing current in unidirectional.
9. The system (200) as claimed in claim 1, wherein the first predetermined current level, the third predetermined current level, the fifth predetermined current level, and the seventh predetermined current level are lower than the second predetermined current level, the fourth predetermined current level, the sixth predetermined current level, and the eighth predetermined current level.
10. The system (200) as claimed in claim 1, wherein the first predetermined current level, the second predetermined current level, the third predetermined current level, the fourth predetermined current level, the fifth predetermined current level, the sixth predetermined current level, the seventh predetermined current level, and the eighth predetermined current level varies based on the load/the sub-system requirements.
11. The system (200) as claimed in claim 1, wherein the first pre-charge circuit (204), the second pre-charge circuit (206), the first discharge switch (208), and first charge switch (210) are controlled and operated by the first BMS (104A), and the control unit 106, wherein the third pre-charge circuit (216), the fourth pre-charge circuit (218), the second discharge switch (220), and the second charge switch (222) are controlled and operated by the second BMS (104B) and the control unit (106).
12. The system (200) as claimed in claim 1, wherein the SOC of the first battery pack (102A) and the SOC of the second battery pack (102B) varies based on the first predetermined capacity and the second predetermined capacity of the first battery pack (102A), and the second battery pack (102B).
13. The system (200) as claimed in above claims, wherein the system comprises an initial state pre-charge circuit (302) to limit inrush current when the vehicle turns on from the idle to run, wherein the initial state pre-charge circuit 302 comprises at least one of the first pre-charge circuit (204), and the third pre-charge circuit (216), wherein the system (100) comprises a transition state pre-charge circuit (304) to limit inrush current when the control unit (106) switches power distribution from the first battery pack (102A) to the second battery pack (102B), wherein the transition state pre-charge circuit (304) comprises at least one of the second pre-charge circuit (206), and the fourth pre-charge circuit (218).
14. The system (200) as claimed in above claims, wherein the system (200) further comprises a regulative pre-charge circuit (402) to limit inrush, wherein the regulative pre-charge circuit (402) comprises the initial state pre-charge circuit (302), and the transition state pre-charge circuit (304) to limit inrush current.
15. A method (500) for managing usage of a plurality of battery packs (102) in a vehicle, comprising:
distributing, by a first battery pack (102A) with a first predetermined capacity, power to the vehicle till a first predetermined SOC level, wherein the first battery pack (102A) comprises a first BMS (104A), wherein the first BMS (104A) comprises a first pre-charge circuit (204), a second pre-charge circuit (206), a first discharge switch (208), and a first charge switch (210);
distributing, by a second battery pack (102B) with a second predetermined capacity, power to the vehicle till a second predetermined SOC level, wherein the second battery pack (102B) comprises a second BMS (104B), wherein the second BMS (104B) comprises a third pre-charge circuit (216), a fourth pre-charge circuit (218), a second discharge switch (220), and a second charge switch (222);
turning, by a first state, the vehicle on from an idle-to-run using the first battery pack (102A), wherein the first state comprises a first regulation path, a first supply path, a first switch path, a second regulation path, and a second supply path;
switching, by a control unit (106), power distribution of the vehicle from the first battery pack (102A) to the second battery pack (102B) when the SOC of the first battery pack (102A) is discharged to the first predetermined SOC level by sending a first set of control signals to the first BMS (104A) and the second BMS (104B) from the control unit (106);
turning, by a second state, the vehicle on from an idle-to-run using the second battery pack (102B), wherein the second state comprises a third regulation path, a third supply path, a second switch path, a fourth regulation path, and a fourth supply path; and
switching, by the controller unit, the power distribution of the vehicle from the second battery pack (102B) to the first battery pack (102A) when the SOC of the second battery pack (102B) is discharged to the second predetermined SOC level by sending a second set of control signals to the first BMS (104A) and the second BMS (104B) from the control unit (106).
16. The method (500) as claimed in claim 15, wherein the method (500) further comprising:
regulating, by the control unit (106), current level of the first battery pack (102A) to a first predetermined current level;
allowing, by the control unit (106), the first predetermined current level of the first battery pack (102A) to the load/the subsystem (110) via the first regulation path, wherein the first regulation path comprises a first set of a plurality of cells (202), the first pre-charge circuit (204), the first charge switch (210), and the load/the subsystem (110);
allowing, by the control unit (106), a second predetermined current level of the first battery pack (102A) to the load/the subsystem (110) via the first supply path, wherein the first supply path comprises the first set of the plurality of cells (202), the first discharge switch (208), the first charge switch (210), and the load/the subsystem (110);
allowing, by the control unit (106), the second battery pack to discharge to the load/the subsystem (110) by the control unit (106) via the first switch path, wherein the first switch path comprises the control unit (106), the first battery pack (102A), the first BMS (104A), the second battery pack (102B), the second BMS (104B), and the load/the subsystem (110);
regulating, by the control unit (106), current level of the second battery pack (102B) to a third predetermined current level via the second regulation path, wherein the second regulation path comprises a second set of a plurality of cells (214), the fourth pre-charge circuit (218), the second charge switch (222), and the load/the subsystem (110); and
allowing, by the control unit (106), the second battery pack (102B) to discharge power in a fourth predetermined current level to the load/the subsystem (110) via the second supply path, wherein the second supply path comprises the second set of the plurality of cells (214), the second discharge switch (220), the second charge switch (222), and the load/the subsystem (110).
17. The method (500) as claimed in claim 15, wherein the method (500) further comprising:
regulating, by the control unit (106), current level of the second battery pack (102B) to a fifth predetermined current level;
allowing, by the control unit (106), the fifth predetermined current level to the load/the subsystem (110) via the third regulation path, wherein the third regulation path comprises the second set of the plurality of cells (214), the third pre-charge circuit (216), the second charge switch (222), and the load/the subsystem (110);
allowing, by the third supply path, a sixth predetermined current level of the second battery pack (102B) to the load/the subsystem (110) via the third supply path, wherein the third supply path comprises the second set of the plurality of cells (214), the second discharge switch (220), the second charge switch (222), and the load/the subsystem (110);
allowing, by the control unit (106), the first battery pack (102A) to discharge to the load/the subsystem (110) via the second switch path, wherein the second switch path comprises the control unit (106), the first battery pack (102A), the first BMS (104A), the second battery pack (102B), the second BMS (104B), and the load/the subsystem (110);
regulating, by the control unit (106), current level of the first battery pack (102A) to a seventh predetermined current level via the fourth regulation path, wherein the fourth regulation path comprises the first set of the plurality of cells (202), the second pre-charge circuit (206), the first charge switch (210), and the load/the subsystem (110); and
allowing, by the control unit (106), the first battery pack (102A) to discharge power in an eighth predetermined current level to the load/the subsystem (110) via the fourth supply path, wherein the fourth supply path comprises the first set of the plurality of cells (202), the first discharge switch (208), the first charge switch (210), and the load/the subsystem (110).
18. The method (500) as claimed in claim 15, wherein the method (500) further comprising:
passing, using the first charge switch (210), and the second charge switch (222), current in unidirectional to avoid short-circuit issues between the first battery pack (102A), and the second battery pack (102B).
19. The method (500) as claimed in claim 15, wherein the first predetermined current level, the third predetermined current level, the fifth predetermined current level, and the seventh predetermined current level are lower than the second predetermined current level, the fourth predetermined current level, the sixth predetermined current level, and the eighth predetermined current level.
20. The method (500) as claimed in claim 15, wherein the first predetermined current level, the second predetermined current level, the third predetermined current level, the fourth predetermined current level, the fifth predetermined current level, the sixth predetermined current level, the seventh predetermined current level, and the eighth predetermined current level varies based on the load/the sub-system requirements.
21. The method (500) as claimed in claim 15, wherein the first pre-charge circuit (204), the second pre-charge circuit (206), the first discharge switch (208), and the first charge switch (210) are controlled, and operated by the first BMS (104A), and the control unit 106, wherein the third pre-charge circuit (216), the fourth pre-charge circuit (218), the second discharge switch (220), and the second charge switch (222) are controlled and operated by the second BMS (104B) and the control unit (106).
22. The method (500) as claimed in claim 15, wherein the SOC of the first battery pack (102A) and the SOC of the second battery pack (102B) varies based on the first predetermined capacity and the second predetermined capacity of the first battery pack (102A), and the second battery pack (102B).
23. The method (500) as claimed in above claims, wherein the method (500) comprises an initial state pre-charge circuit (302) to limit inrush current when the vehicle turns on from the idle to run, wherein the initial state pre-charge circuit 302 comprises at least one of the first pre-charge circuit (204), and the third pre-charge circuit (216), wherein the method (500) comprises a transition state pre-charge circuit (304) to limit inrush current when the control unit (106) switches power distribution from the first battery pack (102A) to the second battery pack (102B), wherein the transition state pre-charge circuit (304) comprises at least one of the second pre-charge circuit (206), and the fourth pre-charge circuit (218).
24. The method (500) as claimed in above claims, wherein the method (500) further comprises a regulative pre-charge circuit (402) to limit inrush, wherein the regulative pre-charge circuit (402) comprises the initial state pre-charge circuit (302), and the transition state pre-charge circuit (304) to limit inrush current.