Claims:
1. A thermal management system (100) for a battery, wherein the thermal management system comprises:
a container (102), wherein the container (102) is hermetically sealed;
a coolant liquid (104) filled in the container (102), wherein the coolant liquid (104) is a single-phased liquid;
a battery assembly (106) placed within the container (102), wherein the battery assembly (106) is immersed in the coolant liquid (104), and wherein the battery assembly (106) comprises a plurality of battery (108) connected in at least a series combination and a parallel combination; and
a pump (110) operatively connected to the container (102), wherein the pump (110) is configured to circulate the coolant liquid (104) inside the container (102) thereby dissipating heat from the battery assembly (106).
2. The thermal management system (100) as claimed in Claim 1, wherein the pump (110) is operatively connected either inside the container (102) or externally to the container (102), and wherein the pump (110) is capable to function as a chiller (109) and a heater (111)

3. The thermal management system (100) as claimed in Claim 1, further comprises:
a temperature sensor (112) fitted in the container (102) to monitor an internal temperature (TI);
an analyzer (122) fitted in the container (102) to analyze composition of gases generated, and introduced in the coolant liquid (104);
a moisture sensor (114) fitted in the container (102) to monitor a water content inside the container (102); and
a plurality of racks (116) placed in the container (102) to mount the battery assembly (106) inside the container (102).
4. The thermal management system (100) as claimed in Claim 1, further comprises a reservoir (118) connected to the container (102), wherein the reservoir (118) comprises the coolant liquid (104), and wherein the reservoir (118) is connected to the pump (110) for drawing the coolant liquid (104) inside the container (102), and wherein the reservoir (118) receives the coolant liquid (104) from the container (102) upon cooling the battery assembly (106).

5. The thermal management system (100) as claimed in Claim 1, 3, and 4, further comprises a Battery Management System (BMS) (120) for maintaining the internal temperature (TI), and an amount of the coolant liquid (104) inside the container (102), and wherein the BMS (120) controls operation of the battery assembly (106), the temperature sensor (112), the moisture sensor (114), the pump (110), and the reservoir (118).

6. The thermal management system (100) as claimed in Claim 1, wherein the battery assembly (106) comprises a plurality of a Lithium-ion battery or a Lithium-ion cell.

7. The thermal management system (100) as claimed in Claim 1, wherein the plurality of battery (108) is either a new battery, a partially used battery, a new cell, and a partially used cell.

8. The thermal management system (100) as claimed in Claim 1, wherein the container (102) is corrugated to form fins-like shape internally, wherein the corrugation is to increase surface area of the container (102) thereby assisting heat dissipation.

9. A method (200) for creating a thermal management system (100) for a battery, the method (200) comprises:
receiving a container (102), wherein the container (102) is hermetically sealed;
filling a coolant liquid (104) in the container (102), wherein the coolant liquid (104) is a single-phased liquid;
placing a battery assembly (106) within the container (102), wherein the battery assembly (106) is immersed in the coolant liquid (104), and wherein the battery assembly (106) comprises a plurality of battery (108) connected in at least a series combination and a parallel combination; and
operatively connecting a pump (110) to the container (102), wherein the pump (110) is configured to circulate the coolant liquid (104) inside the container (102) thereby dissipating heat from the battery assembly (106).
10. The method (200) as claimed in Claim 9, the method (200) comprises:
fitting a temperature sensor (112) in the container (102) to monitor an internal temperature (TI);
fitting an analyzer (122) in the container (102) to analyze composition of gases generated in the coolant liquid (104);
fitting a moisture sensor (114) in the container (102) to monitor a water content inside the container (102); and
placing a plurality of racks (116) in the container (102) to mount the battery assembly (106) inside the container (102).
, Description:
FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
THERMAL MANAGEMENT OF BATTERY

Applicant:
AMPEREHOUR SOLAR TECHNOLOGY PRIVATE LIMITED
An Indian company having address as:
403, Ekaika Society, Kharadi Bypass Road, Kharadi,
Pune- 411014, Maharashtra, India

The following specification describes the invention and the manner in which it is to be performed.
PRIORITY INFORMATION
[001] The present application does not claim a priority from any other application.
TECHNICAL FIELD
[002] The present subject matter described herein, in general, relates to a thermal management and more particularly to a thermal management of a battery.
BACKGROUND
[003] Conventionally, batteries and dry cells are used to power electrical appliances. It is generally known that batteries convert stored chemical energy to electrical energy while in use and for charging another object. Such conversion of energy from stored chemical energy to electrical energy also involves creation of heat energy which is known to increase temperature of the batteries or cells. The increase in temperature of the batteries or cells is common and unavoidable. Depending on the constituents of battery, different levels of hazards and risk associated with the increase in temperature may be predicted. In some cases, the increase in temperature of batteries is typically known to cause accidental fire. On the other hand, the increase in temperature also reduces the service life of the battery. Therefore, the proper maintenance and usage of batteries while preventing accidental fires, and short circuits may become challenging.
SUMMARY
[004] Before the present system(s) and method(s), are described, it is to be understood that this application is not limited to the particular system(s), and methodologies described, as there can be multiple possible embodiments which are not expressly illustrated in the present disclosure. It is also to be understood that the terminology used in the description is for the purpose of describing the particular implementations or versions or embodiments only and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to a system and a method for thermal management of a battery. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.
[005] In one implementation, a thermal management system for a battery is disclosed. The thermal management system for a battery may comprise a container. It may be understood that the container may be hermetically sealed. Further, the thermal management system may comprise a coolant liquid filled in the container. Furthermore, the coolant liquid may be a single-phased liquid. The thermal management system may also comprise a battery assembly placed within the container, wherein the battery assembly may be immersed in the coolant liquid. It may be noted that the battery assembly may comprise a plurality of battery cells connected in at least a series combination and a parallel combination. Finally, the thermal management system may comprise a pump operatively connected to the container, wherein the pump may be configured to circulate the coolant liquid inside the container, thereby thermally managing the battery.
[006] In another implementation, a method for producing a thermal management system for a battery is disclosed. In order to create the thermal management system for a battery, initially, a container may be received, and the container may be a hermetically sealed container. Further, a coolant liquid may be filled in the container. It may be noted that the coolant liquid may be a single-phased liquid. Furthermore, a battery assembly may be placed within the container. It may be understood that the battery assembly may be immersed in the coolant liquid and may comprise a plurality of batteries connected in at least a series combination and a parallel combination. Finally, a pump may be operatively connected to the container. It may be noted that the pump may be configured to circulate the coolant liquid insider the container thereby thermally managing the battery.
BRIEF DESCRIPTION OF THE DRAWINGS
[007] The foregoing detailed description of embodiments is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the present subject matter, an example of a construction of the present subject matter is provided as figures, however, the invention is not limited to the specific method and system for thermal management, disclosed in the document and the figures.
[008] The present subject matter is described in detail with reference to the accompanying figures. In the figures, the leftmost digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to refer to various features of the present subject matter.

[009] Figure 1 illustrates a side view of the thermal management system for a battery, in accordance with an embodiment of the present subject matter.

[0010] Figure 2 illustrates a method for producing the thermal management system for a battery, in accordance with an embodiment of the present subject matter.

[0011] The figures depict an embodiment of the present disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION

[0012] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "receiving," "filling," "placing," "operatively connecting”, “fitting”, and “installing”, and other forms thereof, are intended to be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although any system and methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary system and methods are now described. The disclosed embodiments are merely examples of the disclosure, which may be embodied in various forms.

[0013] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. However, one of ordinary skill in the art will readily recognize that the present disclosure is not intended to be limited to the embodiments described but is to be accorded the widest scope consistent with the principles and features described herein.
[0014] The present invention describes a method and a system for producing a thermal management system for a battery. Generally, when a battery is used for a long stretch of time, and is charged or discharged at high rate, the temperature of the battery increases. In some instances, the extent of increase in temperature may increase with the time accumulation during charging and discharging processes of the battery. If the battery performance deteriorates further, accidental fire incidents may also follow. This makes using batteries quite difficult. Depending on the composition of the battery, some batteries such as Lithium-ion batteries may require additional precautionary measures. In order to overcome these difficulties, the thermal management system for the battery may be created.
[0015] In order to create the thermal management system for the battery, initially, a container may be received, and the container may be a hermetically sealed or air-tight container. Post receiving the hermetically sealed container, a coolant liquid may be filled in the container. It may be noted that the coolant liquid may be a single-phased liquid immersed cooling system component and a dielectric liquid. Furthermore, a battery assembly may be placed within the container.
[0016] It may be understood that the battery assembly may be immersed in the coolant liquid and may comprise a plurality of batteries connected in at least a series combination and a parallel combination. The battery assembly may comprise a plurality of battery. Further, a pump may be operatively connected to the container. It may be pertinent to note that the plurality of battery used may be a first life battery, a new cell, a partially used battery, and even a second life battery. Thus, the present invention may make use of second life batteries by combining the plurality of batteries to form the battery assembly. It may be understood that reusing the second life batteries may lead to thermal runaway of batteries. The heat generated by the battery assembly may be dissipated by the present invention.
[0017] While aspects of the described system and method for creating the thermal management system for the battery may be implemented in any number of different computing systems, environments, and/or configurations, the embodiments are described in the context of the following exemplary system.
[0018] Referring now to Figure 1, a side view of a thermal management system 100 for thermal management is disclosed. The thermal management system may be used for a battery. It may be understood that the positions of components of the thermal management system 100 may be changed as per requirement and may be referred for illustrative purposes. Initially, a container 102 may be received. In one embodiment, the container 102 may be hermetically sealed during operation. It may be understood that the hermetic sealing may also be referred to as an air-tight sealing capable of preventing unwanted transmission of gases, particulates and liquids in and out from the container 102. Further, the hermetic sealing may also prevent air from entering and occupying any hollow space inside the container 102. Particularly, preventing entry of Oxygen within the container 102 may assist in preventing sparks, and accidental fire incidents.
[0019] Further, the hermetic sealing may protect the thermal management system 100 from the external environment and keep the thermal management system 100 sealed thereby adding stability to the internal environment. In an example, the hermetic sealing may be done with help of resins. In another example, the hermetic sealing may be done using metals. Alternatively, plastic, and other gas impermeable materials may be used to hermetically seal the container 102.

[0020] In one example, the container 102 may be corrugated internally. The internal corrugation may be understood as an outcome of a shaping process, wherein the container 102 may be shaped in a desired manner. In one example, the corrugation may be used to bring about structural formations of parallel ridges and grooves. In another example, the corrugation may be used to facilitate formation of fins-like shape internally into the container 102. It may be pertinent to note that corrugation may increase surface area of the container 102.

[0021] It may be understood that the fins-like shape may comprise larger surface area as compared to plain or non-corrugated shape of the container 102. Further, the increased surface area may be understood to assist in the heat dissipation by providing more surface area for a coolant liquid 104 to cover a battery assembly 106. Therefore, the corrugation of the container 102 may be understood to assist in the thermal management.
[0022] In another embodiment, the thermal management system 100 may comprise a transformer tank design which may save the production cost and specific machinery required for producing the container 102.
[0023] Further, the thermal management system 100 may comprise the coolant liquid 104 filled in the container 102. In one embodiment, the coolant liquid 104 may be a single-phased liquid immersed cooling system component and a dielectric liquid. It may be noted that the choice of coolant may be critical for the operation of the thermal management system 100.

[0024] Further, the desired properties of the coolant liquid 104 may include high thermal conductivity, high boiling point, and low viscosity. Further, the coolant liquid 104 may demonstrate high dielectric breakdown voltage and be biodegradable in nature. In one example, the coolant liquid 104 may preferably have boiling point up to 400° C. Further, compatibility tests may be run for determining optimal conditions for working of the coolant liquid 104 in the disclosed thermal management system 100 for the battery. It may be understood that combination of the coolant liquid 104 and the battery assembly 106 may be tested over variable operating range to identify the optimal working conditions.

[0025] Further the thermal management system 100 comprises a battery assembly 106 placed within the container 102. It may be noted that the battery assembly 106 may be immersed in the coolant liquid 104. The battery assembly 106 may be understood to comprise a plurality of battery 108. Further, the plurality of battery 108 may be connected in at least a series combination, and a parallel combination to form the battery assembly 106. In one example, the battery assembly 106 may comprise a plurality of a Lithium-ion battery or a Lithium-ion cell. It may be understood that the battery assembly 106 may comprise the plurality of battery 108, wherein the plurality of battery 108 may either be a new battery, a partially used battery, a new cell, and a partially used cell. In one example, the plurality of battery 108 may be referred to as a string of battery cell packs.

[0026] In one example, the plurality of battery 108 may be connected in the series combination. In another example, the plurality of battery 108 may be connected in the parallel combination. In one example, the thermal management system 100 may be implemented for the battery assembly 106 to provide a battery pack voltage from 2 V to 1500 Vdc. It may be noted that the battery assembly 106 may comprise at least a partially used battery, a discarded battery, and a second life battery. The system 102 facilitates reusability of the discarded battery for attaining voltage range of 2V to 1500Vdc.

[0027] Further, the thermal management system 100 for the battery may comprise a pump 110 operatively connected to the container 102. It may be understood that the pump 110 may be configured to uniformly circulate the coolant liquid 104 inside the container 102 through a coolant liquid circulation circuit 105. The coolant liquid circulation circuit 105 may be understood to connect the container 102, the pump 110 and a reservoir 118. In one example, the coolant liquid circulation circuit 105 may be made up of pipes.
[0028] Further, the pump 110 may be operatively connected either inside the container 102, or externally to the container 102. In one example, the pump 110 may also include functions of a chiller 109 The chiller 109 may also be referred to as a cooler with an array of external fans and a radiator for chilling purpose.

[0029] In another example, the pump 110 may also include functions of a heater 111.The heater 111 may also be understood to heat the coolant liquid 104 passing through the coolant liquid circulation circuit 105.

[0030] During operation, the ambient temperature may directly affect the temperature of the container 102. In one example, the ambient temperature may be higher than the maximum working temperature of the thermal management system 100. Further, the internal temperature (TI) may be affected due to the high ambient temperature. In such conditions, the thermal management system 100 may comprise the pump 110 that may act as the chiller 109 for the container 102. The chiller 109 may decrease the temperature inside the container 102 to maintain the optimum working temperature condition. Therefore, the internal temperature (TI) may be thermally managed by the system 100 in high temperature conditions.

[0031] In another example, the thermal management system the system 100 may be placed in an area of high altitude. It may be noted that the in the area of high altitude the ambient temperature may be lower than the minimum working temperature of the thermal management system 100. In such conditions, the thermal management system 100 may comprise the pump 110 that may act as the heater 111 for the container 102. The heater 111 may increase the temperature inside the container 102 to maintain the minimum working temperature condition. Thus, the internal temperature (TI) may be thermally managed by the thermal management system 100 in low temperature conditions.

[0032] Further, the thermal management system 100 for the battery may comprise a temperature sensor 112 fitted in the container 102 to monitor an internal temperature. In one example, the temperature sensor 112 may monitor the internal temperature (TI).

[0033] In one example the thermal management system 100 for the battery may also comprise an external temperature sensor 124 to monitor an ambient temperature (TA). In one example, the external temperature sensor 124 may monitor the ambient temperature (TA). It may be understood that the external temperature sensor 124 may be fitted outside the container 102.

[0034] Furthermore, the thermal management system 100 for the battery may comprise a moisture sensor 114 fitted in the container 102 to monitor a water content inside the container 102.

[0035] In one example, the thermal management system 100 for the battery may comprise more than one sensor. In other example, the thermal management system 100 may comprise a chemical analyzer 115 to monitor the chemical composition of the coolant liquid 104.

[0036] Further, the thermal management system 100 for the battery may comprise a humidity sensor 126 to monitor an ambient Humidity (HA). In one example, the humidity sensor 126 may be fitted outside the container 102.

[0037] Furthermore, the thermal management system 100 for the battery may comprise an insulation monitoring sensor 128 for maintaining an insulation value inside the container 102. In one example, the insulation monitoring sensor 128 may maintain the insulation value inside the container 102 above 5kV.

[0038] Further, the thermal management system 100 may comprise a plurality of racks 116 placed in the container 102 to mount the battery assembly 106 inside the container 102. The plurality of racks 116 may be understood as supporting structures placed and fixed in the container 102. Further, the shape and number of the plurality of racks 116 may vary as per requirement. In one example, the battery assembly 106 size and quantity may be used to decide the size and number of the plurality of racks. In one example, the plurality of racks may be made of metal. In another example the plurality of racks may be made of and thermally stable plastic materials.

[0039] Further, the thermal management system 100 may comprise the reservoir 118 connected to the container 102. It may be understood that the reservoir 118 may store the coolant liquid 104 and the reservoir 118 may be connected through the coolant liquid circulation circuit 105 to the pump 110 for drawing the coolant liquid 104 inside the container 102 and for receiving the coolant liquid 104 from the container 102 upon cooling the battery assembly 106. In one example, the reservoir 118 may also be referred to as a coolant tank, a coolant reservoir, and a conservator.

[0040] In one embodiment, the coolant liquid 104 may be stored in the reservoir 118. Further, the reservoir 118 may be connected to the pump 110 through the coolant liquid circulation circuit 105. In one example, the coolant reservoir may be connected to the pump 110 through a tube. Furthermore, the reservoir 118 may comprise two openings connected to the coolant liquid circulation circuit 105 on either side of the reservoir 118.

[0041] It may be noted that one of the opening may be considered as an outlet for drawing the coolant liquid 104 to the container 102 for dissipating heat during operation. Further, the second opening may be considered as an inlet for receiving the coolant liquid 104 from the container 102 in the reservoir 118. Further, during operation the battery assembly 106 may generate heat. The heat generated by the battery assembly 106 may be dissipated by the coolant liquid 104 surrounding the battery assembly 106, thereby preventing thermal run away of the battery assembly 106.

[0042] During operation, the coolant liquid 104 may dissipate heat until the temperature sensor 112 senses the internal temperature TI up to the minimum operating temperature. In one example, the minimum operating temperature of the system 100 may be 15 ° C. Further, the temperature of the coolant liquid 104 may rise eventually during operation. It may be understood that the coolant liquid 104 may be recirculated in the container 102 to avoid the internal temperature TI from changing. Therefore, to bring about the recirculation, the coolant liquid 104 circulated in the container 102 may be sent to the reservoir 118.

[0043] Further, post entering the reservoir 118, the coolant liquid 104 may cool down in due course. It may be understood that during the cool down process, heat may be radiated from the reservoir and conducted to ambient air. Further, the heat may also be transferred within the ambient medium through convection. Meanwhile, the coolant liquid 104 previously stored in the reservoir 118 may be circulated from the outlet into the container 102 through the tube. In order to continue with the thermal management during operation, the coolant liquid 104 may be kept circulating between the reservoir 118 and the container 102 through the tube connecting the outlet and the inlet of the reservoir 118.

[0044] Furthermore, the thermal management system 100 may comprise a Battery Management System (BMS) 120. It may be understood that the BMS 120 may maintain a plurality of parameters comprising but not limited to the internal temperature (TI), water content, chemical composition of the coolant liquid 104 and an amount of the coolant liquid 104 (VI) inside the container 102. The BMS 120 may comprise a control strategy for efficient thermal management and prevention of fire. It may be understood that the BMS 120 may control the operations of the battery assembly 106, the temperature sensor 112, the moisture sensor 114, the pump 110 and the reservoir 118. It may be understood that the BMS 120 may continuously monitor and maintain the internal temperature (TI) by regulating the amount of the coolant liquid 104 (VI) inside the container 102. In one example, the BMS 120 may maintain the chemical composition inside the container 102. In another example, the BMS 120 may maintain amount of flow rate and temperature of the coolant liquid 104 inside the container 102.

[0045] In one example, the BMS 120, may maintain the internal temperature (TI) of the container 102 for the thermal management system 100. In other example, the minimum working temperature for the thermal management system 100 may be 15 °C. Further, if the internal temperature (TI) approaches 25°C the BMS 120 may increase the flow of the coolant liquid 104 from the reservoir 118 into the container 102, by removing the coolant liquid 104 used in the container 102 and recirculating the coolant liquid 104 from the reservoir 118 into the container 102 while maintaining the amount of the coolant liquid 104 (VI) inside the container 102. In one example, the thermal management system 100 may also comprise a radiator and a plurality of fan attached to the radiator for radiating the heat from the container 102 to ambient environment. Further, the thermal management system 100 may also comprise control switches to turn on and turn off the plurality of fan.

[0046] It may be noted that the BMS 120 may be an active balancing BMS, and a passive balancing BMS. Further, the active balancing BMS may be understood to redistribute charge during the charging and discharging cycle of the battery. On the contrary, the passive balancing BMS may be understood to simply dissipate heat during a charge cycle of the battery. Further, the active and passive balancing BMS may be understood to contribute towards cell balancing in order to improve battery stack performance. In one example, the thermal management system 100 may comprise an inverter, and an electric power converter. Further, the electric power converter may be a direct current converter.
[0047] Consider an example of a Lithium-ion battery. The Lithium-ion batteries are prone to catch fire being highly unstable. Therefore, transportation of a pack of Lithium-ion batteries has always been risky. It may be understood that transportation of Lithium-ion batteries may require special transportation approvals due to the risk involved. Typically, Lithium-ion batteries are transported in parts at lower charge conditions to avoid fire and assembled on site to avoid such issues. Further, several first life batteries are rejected due to minor faults.

[0048] In an example, a plurality of Lithium-ion second life batteries are connected to each other in a series or parallel combination to form a battery assembly 106. The battery assembly 106 may be placed in a container 102 which can be hermetically sealed. In other example, the battery assembly 106 may also be referred to as a battery cell pack.

[0049] Further, a coolant liquid 104 may be used to fill the container 102 such that the battery assembly 106 comprising the plurality of Lithium-ion second life batteries 108 is completely immersed in the coolant liquid 104. In order to make the battery assembly 106 more stable and compact, a plurality of racks 116 may also be fixed inside the container 102. In one example, the plurality of racks may also be referred to as a supporting structure for stacking the plurality of battery 108.

[0050] The battery assembly 106 may be mounted on the plurality of racks 116. Further a reservoir 118 may be created for storing the coolant liquid 104. The reservoir may be a can-like object filled with the coolant liquid 104. In next step, a pump 110 may be connected to the container 102 and to the reservoir 118. In one example, the reservoir 118 may be a tank like object.

[0051] The pump 110 may be connected internally or externally to the container 102. Further, the pump 110 may circulate the coolant liquid 104 from the reservoir 118 to the container 102 and redirect the coolant liquid 104 from the container 102 into the reservoir 118.
[0052] Further, a temperature sensor 112, an analyzer 122 and a moisture sensor 114 may be fitted to monitor the internal temperature (TI), to analyze composition of gases dissolved and generated in the coolant liquid 104, and the water content within the container 102. In one example, the analyzer 122 may also be referred to as a sensor for dissolved gas analysis. Also, a Battery management system 120 may be installed to monitor the internal temperature (TI), the water content and the amount of coolant liquid inside the container (VI).

[0053] It may be understood that the present exemplary design of the thermal management system 100 may be suitable for a Battery Pack voltage from 2 V to 1500 Vdc. During operation, when the battery assembly 106 starts working, heat will be generated from the battery assembly. Since the battery assembly 106 is immersed in the coolant liquid 104, the coolant liquid 104 may dissipate the heat generated by the battery assembly 106. Thus, overheating of the battery assembly 106 may be avoided.

[0054] Further, the coolant liquid 104 may be constantly circulated between the container 102 and the reservoir 118 to continuously replenish the coolant liquid in the container thereby maintaining the internal temperature (TI) of the container as desired. Making use of the thermal management system 100 may avoid thermal runaway of the battery assembly 106, prevent any accidental fire due to overheating or short circuits of battery. Hence, the exemplary embodiment demonstrates ideal usage of second life Lithium-ion batteries in the most secure and hazard free environment.

[0055] Referring now to figure 2, a method 200 for producing a thermal management system 100 for a battery is shown, in accordance with an embodiment of the present subject matter. The order in which the method 200 is described is not intended to be construed as a limitation, and any number of the described method blocks can be combined in any order to implement the method 200 or alternate methods for producing a thermal management system 100 for a battery.

[0056] Additionally, individual blocks may be deleted from the method 200 without departing from the scope of the subject matter described herein. Furthermore, the method 200 producing a thermal management system 100 can be implemented in any suitable hardware, software, firmware, or combination thereof. However, for ease of explanation, in the embodiments described below the method 200 may be considered to be implemented as described in the thermal management system 100 for the battery.
[0057] At block 202, a container 102 may be received. In one aspect, the container 102 may be hermetically sealed during operation.
[0058] At block 204, a coolant liquid 104 may be filled in the container 102. In one aspect, the coolant liquid 104 may be a single-phased liquid. It may be understood that the coolant liquid may be the single-phased liquid immersed cooling system component.
[0059] At block 206, a battery assembly 106 may be placed within the container 102. It may be understood that the battery assembly 106 may be immersed in the coolant liquid 104. Further, the battery assembly 106 may be understood to comprise a plurality of battery 108 connected in a series combination, and a parallel combination.
[0060] At block 208, a pump 110 may be operatively connected to the container 102. In one aspect, the pump 110 may be configured to uniformly circulate the coolant liquid 104 inside the container 102 thereby dissipating heat from the battery assembly 106.
[0061] Further, the method 200 may also comprise fitting a temperature sensor 112 in the container 102 to monitor an internal temperature (TI).
[0062] Further, the method 200 may comprise fitting an analyzer 122 in the container 102 to analyze composition of gases generated in the coolant liquid 104 inside the container 102.
[0063] Furthermore, the method 200 may comprise fitting a moisture sensor 114 in the container 102 to monitor a water content inside the container 102.
[0064] Further, the method 200 may also comprise placing a plurality of racks 116 in the container 102. It may be understood that the battery assembly 106 may be mounted on the plurality of racks 116 inside the container 102.
[0065] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
[0066] Some embodiments of the system and the method provide a secure and convenient battery cooling option in the form of the thermal management system.
[0067] Some embodiments of the system and the method provide an efficient and economical option to reuse partially used batteries, and second life batteries by combining such batteries together.
[0068] Some embodiments of the system and method prevent battery heating as the battery is completely immersed in the coolant liquid and also prevent fire due to thermal runaway or short circuits of battery.
[0069] Some embodiments of the system and method promote safe and secure use of Lithium-ion batteries in the commercial and industrial sector.
[0070] Some embodiments of the system and method provide fire proof device for battery usable at any location without any external active fire suppression system.
[0071] Some embodiments of the system and method enable electrical and thermodynamic management of batteries.
[0072] Some embodiments of the system and method may reduce auxiliary consumption of batteries.
[0073] Although implementations for methods and system for thermal management of a battery have been described in language specific to structural features and/or methods, it is to be understood that the appended claims are not necessarily limited to the specific features or methods described. Rather, the specific features and methods are disclosed as examples of implementations for producing a thermal management system for a battery.