Description:TECHNICAL FIELD
[001] The present subject matter relates to a charging control system, more particularly, method for charging an auxiliary battery by the charging control system.
BACKGROUND
[002] In general, a battery is determined based on a power rating which classifies 5 the battery as a high capacity battery having a higher voltage and power rating, and a low capacity battery having a low voltage and power rating.
[003] In general, the battery is further sub divided based on the chemical composition of the battery, such as a lead acid battery and a lithium ion battery. In general, a lead acid battery is used in vehicles, however due to low power rating of 10 the lead acid batteries, it is now being replaced by the lithium ion battery.
[004] In general, the high capacity lead acid battery is charged in a vehicle from a power source. However, a low capacity lead acid battery is charged from the high capacity battery at all times. This enables constant charging of the low capacity battery, but also causes problem of wastage of power supply once the lead acid 15 battery is charged. However, the overcharging of the lead acid battery is not a problem as the additional power does not disrupt the chemical composition of the lead acid batteries.
[005] In general, in the present vehicles, which uses lithium ion battery, the high voltage battery and the auxiliary battery (low voltage battery) have been replaced 20 from lead acid to lithium ion composition due to longer life span of the lithium ion battery. Conventionally, the auxiliary battery is charged by the high voltage battery in the vehicles.
[006] However, in the above configuration, the power capacity of the auxiliary battery is lower than the power capacity of the high voltage battery. This in turn, 25 causes overcharging of the auxiliary battery and in turn leads to wastage of power supply from the high voltage battery.
[007] Additionally, due to overcharging of the auxiliary battery, the chemical composition of the lithium ion battery degrades due to high ionization of the lithium ions. This high ionization occurs because the Lithium ions are always in high 30 excitation state due to continuous charging of the auxiliary battery. This in turn
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degrades the chemical composition of the auxiliary battery and also reduces the life span of the battery. [008] Furthermore, due to the reduced lifespan of the auxiliary battery, the rapidity of replacement of the auxiliary battery increases which in turn increases the overall cost of the vehicle. 5
[009] Hence, it is preferred to have a charging control system for the auxiliary battery to increase life span of the auxiliary battery and also to prevent overcharging of the auxiliary battery.
SUMMARY
[010] The present subject matter provides a charging control system and a 10 method for charging of an auxiliary battery by the charging control system based on one or more predetermined conditions in order to regulate the charging and discharging of the auxiliary battery and also to prevent depletion of the auxiliary battery due to overcharging.
[011] As per an aspect of the present invention, a charging control system 15 comprising a vehicle control unit, a high voltage battery, an auxiliary battery, and a converter. The vehicle control unit is configured to regulate the turning on and off of a high voltage load and a low voltage load connected to the high voltage battery and the auxiliary battery respectively. Further one of the converter and the high voltage battery is configured to supply a predetermined voltage and current to the 20 auxiliary battery for charging the auxiliary battery based on one or more predetermined conditions.
[012] As per an embodiment, the one or more predetermined conditions being one of a vehicle running condition and a vehicle stand still condition. The auxiliary battery is charged by the converter at the vehicle stand still condition and the 25 auxiliary battery is charged by the high voltage battery at the vehicle running condition.
[013] As per another embodiment, the vehicle control unit comprising a motor control unit, a CAN controller and a transceiver unit, a communication gateway unit, an input output unit, a LIN controller and a transceiver unit, and an ethernet and a 30 transceiver unit.
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[014] As per another embodiment, the converter is a DC-DC converter, and the converter comprising an input output unit, one or more power switches, a pulse width modulator, and a filter. Further, the high voltage battery comprising one or more high voltage terminals, and a battery management system. Further the high voltage battery comprising of a plurality of Li-ion cells. 5
[015] As per another embodiment, the vehicle control unit is configured to determine a current state of charge value of the high voltage battery and the auxiliary battery, and the vehicle control unit is configured to provide the current state of charge value of the auxiliary battery to the converter.
[016] As per another embodiment, the converter is configured to regulate a 10 current and a voltage value to be supplied to the auxiliary battery through the pulse width modulator. The converter is configured to receive input from a sensor. Further the pulse width modulator is configured to decrease the current and the voltage value being supplied to the auxiliary battery.
[017] As per another embodiment, the sensor is configured to detect a keyless 15 starting of the vehicle, and the sensor is connected to the auxiliary battery. The sensor is configured to enable starting and stopping of the vehicle irrespective of charging condition of the auxiliary battery.
[018] As per another embodiment, the vehicle control unit charges the auxiliary battery at the vehicle stand still condition through the converter comprising the 20 following steps. Firstly, determining, by the vehicle control unit, a vehicle speed being equal to zero and a vehicle side stand switch being ON. Secondly, the vehicle control unit waiting for a predefined time for the vehicle speed to be equal to zero. Thirdly, turning off one or more auxiliary loads by the vehicle control unit. Fourthly, setting a charging voltage and current of the auxiliary battery by the vehicle control 25 unit. Fifthly, enabling a pulse width modulation of the converter through a pulse width modulator by the vehicle control unit. Finally, enabling charging of the auxiliary battery by the converter.
[019] As per another embodiment, the vehicle control unit charges the auxiliary battery at the vehicle running condition through the high voltage battery comprising 30 the following steps.. Firstly, determining, by the vehicle control unit, a vehicle
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ignition being ON and a senor being ON. Secondly, determining availability of power from the high voltage battery by the vehicle control unit. Thirdly, determining the high voltage battery is not charging by the vehicle control unit. Fourthly, switching off the auxiliary loads by the vehicle control unit. Finally, enabling charging of the auxiliary battery using the power of the high voltage battery by the 5 vehicle control unit, until the vehicle ignition is turned off. [020] As per another aspect of the present invention, a method for charging an auxiliary battery by a charging control system comprising the following steps. Firstly, checking by the vehicle control unit a current state of charge value of the auxiliary battery. Secondly, determining by the vehicle control unit the current state 10 of charge value of the auxiliary battery is less than a threshold voltage. Thirdly, determining, by the vehicle control unit, one or more predetermined conditions being satisfied, and the one or more predetermined conditions being one of a vehicle running condition and a vehicle stand still condition. Fourthly, enabling charging, by the vehicle control unit, of the auxiliary battery by one of a high voltage battery 15 and a converter based on the one or more predetermined conditions. Fifthly, determining, by the vehicle control unit, the auxiliary battery voltage being greater than a predefined voltage. Finally, stopping charging by the vehicle control unit of the auxiliary battery.
[021] As per another embodiment, the method for charging the auxiliary battery 20 at the vehicle stand still condition comprising the following steps. Firstly, determining, by the vehicle control unit, a vehicle speed being equal to zero and a vehicle side stand switch being ON. Secondly, the vehicle control unit waiting for a predefined time for the vehicle speed to be equal to zero. Thirdly, turning off one or more auxiliary loads by the vehicle control unit. Fourthly, setting a charging voltage 25 and current of the auxiliary battery by the vehicle control unit. Fifthly, enabling a pulse width modulation of the converter through a pulse width modulator by the vehicle control unit. Finally, enabling charging of the auxiliary battery by the converter.
[022] As per another embodiment, the method for charging the auxiliary battery 30 at the vehicle running condition comprising the following steps. Firstly, determining,
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by the vehicle control unit, a vehicle ignition being ON and a senor being ON. Secondly, determining availability of power from the high voltage battery by the vehicle control unit. Thirdly, determining the high voltage battery is not charging by the vehicle control unit. Fourthly, switching off the auxiliary loads by the vehicle control unit. Finally, enabling charging of the auxiliary battery using the power of 5 the high voltage battery by the vehicle control unit, until the vehicle ignition is turned off. [023] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed. 10
BRIEF DESCRIPT ION OF THE DRAWINGS
[024] The present invention is described with reference to figures. This invention is implementable in two-wheeled, three wheeled and four wheeled vehicles. The same numbers are used throughout the drawings to reference like 15 features and components. Further, the inventive features of the invention are outlined in the appended claims.
[025] Figure 1 illustrates a block diagram of a charging control system, in accordance with an embodiment of the present subject matter.
[026] Figure 2 illustrates a block diagram of components provided in the 20 charging control system, in accordance with an embodiment of the present subject matter.
[027] Figure 3 illustrates a block diagram of charging of an auxiliary battery by the charging control system, in accordance with an embodiment of the present subject matter. 25
[028] Figure 4 illustrates a flowchart showing a method for charging the auxiliary battery during a vehicle stand still condition, in accordance with an embodiment of the present subject matter.
[029] Figure 5 illustrates a flowchart showing a method for charging the auxiliary battery during a vehicle running condition, in accordance with an 30 embodiment of the present subject matter.
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DETAILED DESCRIPTION OF THE DRAWINGS
[030] Exemplary embodiments are described with reference to the accompanying drawings. Wherever convenient, the same reference numbers are 5 used throughout the drawings to refer to the same or like parts. While examples and features of disclosed principles are described herein, modifications, adaptations, and other implementations are possible without departing from the scope of the disclosed embodiments. It is intended that the following detailed description be considered as exemplary only, with the true scope being indicated by the following claims. 10
[031] The present subject matter is further described with reference to accompanying figures. It should be noted that the description and figures merely illustrate the principles of the present subject matter. Various arrangements may be devised that, although not explicitly described or shown herein, encompass the principles of the present subject matter. Moreover, all statements herein reciting 15 principles, aspects, and examples of the present subject matter, as well as specific examples thereof, are intended to encompass equivalents thereof.
[032] The foregoing disclosure is not intended to limit the present disclosure to the precise forms or particular fields of use disclosed. As such, it is contemplated that various alternate embodiments and/or modifications to the present disclosure, 20 whether explicitly described or implied herein, are possible in light of the disclosure. Having thus described embodiments of the present disclosure, a person of ordinary skill in the art will recognize that changes may be made in form and detail without departing from the scope of the present disclosure. Thus, the present disclosure is limited only by the claims. 25
[033] Additionally, all numerical terms, such as, but not limited to, “first”, “second”, “third”, “primary”, “secondary”, “main” or any other ordinary and/or numerical terms, should also be taken only as identifiers, to assist the reader's understanding of the various elements, embodiments, variations and/or modifications of the present disclosure, and may not create any limitations, 30 particularly as to the order, or preference, of any element, embodiment, variation
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and/or modification relative to, or over, another element, embodiment, variation and/or modification. [034] Hence it is an object of the present invention to provide a charging control system and a method to charge a lithium ion auxiliary battery at predetermined conditions without depleting the battery and also to overcome other related problems 5 known in the art as explained in the background problem.
[035] It is also an object of the present invention to reduce wastage of power in unnecessary charging of the auxiliary battery beyond the charging condition of the auxiliary battery.
[036] It is also an object of the present invention to charge the auxiliary battery 10 without depleting the chemicals and without wastage of Li ions in the auxiliary battery due to overcharging.
[037] It is also an object of the present invention to optimize power supply being supplied to the auxiliary battery on various vehicle conditions to reduce power wastage. 15
[038] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[039] Figure 1 illustrates a block diagram of a charging control system (100), in accordance with an embodiment of the present subject matter. In one embodiment, a charging control system (100) is disposed inside an exemplary electric vehicle. The 20 charging control system (100) comprising a vehicle control unit (104) (VCU). The vehicle control unit (104) being disposed in the vehicle. The vehicle control unit (104) is connected to a converter (106). In one embodiment, the converter (106) is a DC-DC converter and the VCU (106) gives a command to the converter (106) to enable DC-DC conversion of a power supply. The power supply is provided to the 25 VCU (104) and the converter (106) from a high voltage battery (110) which provides high voltage AC (alternating current) power supply. The high voltage battery (110) is further configured to supply power to high voltage loads (112) of the vehicle. The high voltage loads (112) including but not restricting a speedometer, a brake system and an ignition system of the vehicle in one embodiment. 30
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[040] The VCU (104) is further connected electrically to an auxiliary battery (108) and the auxiliary battery (108) is configured to provide power supply to auxiliary battery loads (102). In one embodiment, the auxiliary battery is a 12 V battery and the auxiliary battery loads (102) are turn signal lamps and indicators which are given power supply from the auxiliary battery (108). The VCU (104) 5 further senses the auxiliary battery current state of charge value in order to determine the amount of power supply to be given to the auxiliary battery (108). The VCU (104) also enables and disables control of a auxiliary load relay in order to regulate power supply to be given to the auxiliary loads (102). In one embodiment, the VCU (104) determines the power supply to be given to the auxiliary battery (108) from 10 the converter (106) during a vehicle stand still condition for charging the auxiliary battery (108), and the power supply provided is a DC power supply. In another embodiment, the VCU (104) determines the power supply to be supplied to the auxiliary battery (108) from the high voltage battery (110) during a running condition of the vehicle for charging the auxiliary battery (108), and the power 15 supply supplied in this condition is an AC power supply. In one embodiment, the VCU (104) deactivates the auxiliary load relay and cuts off power supply to auxiliary loads (102) during the charging condition of the auxiliary battery (108) and hence increases the rate of charging of the auxiliary battery (108).
[041] Figure 2 illustrates a block diagram of components provided in the 20 charging control system (100), in accordance with an embodiment of the present subject matter. The charging control system (100) comprising the VCU (104), the converter (106) and the high voltage battery (110) further includes various electronic components. The VCU (104) comprising a motor control unit (200) which is configured to regulate the efficiency and torque of an electric motor of the electric 25 vehicle. The VCU (104) also comprising a CAN controller and transceiver unit (202) for communicating and throughout the vehicle components using CAN communication. In one embodiment, the vehicle components include a speedometer, a braking system etc. The VCU (104) also comprising an input and output unit (206), a communication getaway unit (204), a LIN controller and transceiver unit (208) and 30 an ethernet controller and transceiver unit (210). The input and output unit (206) is
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configured to receive inputs from the high voltage battery (110), the auxiliary battery (108), and also provide output from the VCU (104) to the high voltage loads (112), the auxiliary loads (102) and the converter (106). The communication getaway unit (204) enables communication of the VCU (104) through a wireless module to an external electronic or smart gadget which enables keyless entry to the vehicle. The 5 LIN (Local Interconnect Network) controller and transceiver unit (208) for providing control of the VCU (104) over the auxiliary loads (102). The ethernet controller and transceiver unit (210) gives the VCU (104) control over the infotainment system including GPS communication of the vehicle in one embodiment. 10 [042] The converter (106) comprising an input output unit (212), one or more power switches (216), a pulse width modulation unit (214) and one or more filters (218). The input output unit (212) is configured to receive and provide power supply signals from the converter (106) to the auxiliary battery (108) and the VCU (104). The pulse width modulation unit (214) modulates the pulse width of a current value 15 and a voltage value of the power supply which is being supplied to the auxiliary battery (108). The pulse width modulation unit (214) decreases the power rating and reduces the pulse bandwidth of the current value and the voltage value being supplied to the auxiliary battery (108). The one or more power switches (216) enables an ON and OFF condition of the converter (106). The one or more filters 20 (218) reduces the noise and vibrations received from the surrounding of the vehicle and thereby reduces translational and signal losses. In one embodiment, the one or more filters are EMI (electromagnetic interference) filter and EMC (electromagnetic compatibility) filters.
[043] The high voltage battery (110) comprising one or more high voltage (HV) 25 terminals (220) and a battery management system (222). The high voltage battery (110) is made up of plurality of Li-ion cells (224) in one embodiment. The one or more HV terminals (220) supplies power from the high voltage battery (110) to various electrical components of the vehicle. The battery management system (222) regulates the health and life of the high voltage battery (110) and attempts to mitigate 30 thermal runaway of the high voltage battery (110).
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[044] Figure 3 illustrates a block diagram of charging of an auxiliary battery (108) by the charging control system (100), in accordance with an embodiment of the present subject matter. The VCU (104) of the charging control system (100) receives a battery charging voltage and current from the high voltage battery (110). The VCU (104) then provide input to enable the pulse width modulation of the 5 charging voltage and current in the converter (106). The converter (106) steps down the charging current and voltage to a low voltage and low current value. In one embodiment, the low voltage is 12V. The converter (106) then supplies this low charging current and voltage to the auxiliary battery (108) and the low charging voltage is further supplied by the auxiliary battery (108) to the auxiliary loads (102). 10 The low voltage current and voltage output from the converter (106) is also provided to a sensor (300) to determine the current state of charge of the auxiliary battery (108) for initiating keyless entry to the vehicle. The output from the sensor (300) is further provided to the high voltage battery (110) for initiating other vehicle functions, such switching ON ignition system etc, when such keyless entry has been 15 detected.
[045] Figure 4 illustrates a flowchart showing a method for charging the auxiliary battery (108) during a vehicle stand still condition, in accordance with an embodiment of the present subject matter. Firstly, the VCU (104) checks whether the auxiliary battery (108) is present or not as shown in step (404). If the presence 20 of the auxiliary battery (108) is detected, the VCU (104) determines if the auxiliary battery voltage is less than or equal to a threshold voltage as shown in step (406), and the threshold voltage being between 0-5V. If the VCU (104) determines that the auxiliary battery voltage is not equal to the threshold voltage, then the VCU (104) again check for the same condition, until the condition of auxiliary battery voltage 25 is less than or equal to the threshold voltage is satisfied. If the previous condition as shown in step (406) is satisfied, then the VCU (104) determines if the vehicle speed is equal to zero and the side stand switch is ON, which means that the vehicle is in a stand still or stop condition as shown in step (408). If the vehicle is not in a stand still condition, then the VCU (104) enables the output current and voltage from the 30
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converter (106) as per the auxiliary loads (102) and battery charging requirements to give supply to the auxiliary loads (102) as shown in step (422). [046] If the vehicle is determined to be in a stand still condition, then the VCU (104) waits for a predefined time to confirm that the vehicle remains in the stand still condition, as shown in step (410). In one embodiment, the predefined time is 10-20 5 secs. If the VCU (104) confirms that the vehicle remains in the stand still condition, then the VCU (104) turns off the power supply to the auxiliary loads (102) and thereby turns off the auxiliary loads (102), as shown in step (412). After switching off the auxiliary loads (102), the VCU (104) sets the charging voltage and current in the converter (106) as shown in step (414). Thereafter, the pulse width modulation 10 unit (214) of the converter (416) enables the pulse width modulation and steps down the charging current and voltage value as shown in step (416). This low charging current and voltage is fed to the auxiliary battery (108) by the converter (106) to charge the auxiliary battery (108) as shown in step (418). Thereafter, the VCU (104) determines if the voltage of the auxiliary battery (108) is greater than a predefined 15 voltage as shown in step (420), and the predefined voltage being 12V. The VCU (104) thereafter stops charging of the auxiliary battery (108) and resumes the operation of the auxiliary loads (102). If the VCU (104) determines that the voltage of the auxiliary battery (108) is not greater than the predefined voltage, then the VCU (104) enables the converter (106) to continue charging the auxiliary battery (108). 20
[047] Figure 5 illustrates a flowchart showing a method for charging the auxiliary battery (108) during a vehicle running condition, in accordance with an embodiment of the present subject matter. Firstly, the VCU (104) checks whether the auxiliary battery (108) is present or not as shown in step (504). If the presence of the auxiliary battery (108) is detected, the VCU (104) determines if the auxiliary 25 battery voltage is less than or equal to a threshold voltage as shown in step (506), and the threshold voltage being between 0-5V. If the VCU (104) determines that the auxiliary battery voltage is not equal to the threshold voltage, then the VCU (104) again check for the same condition, until the condition of auxiliary battery voltage is less than or equal to the threshold voltage is satisfied. If the previous condition as 30 shown in step (506) is satisfied, then the VCU (104) checks whether the vehicle
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ignition is ON or not as shown in step (508) in order to determine the vehicle running condition. If the VCU (104) determines that the vehicle ignition is ON, then the VCU (104) checks whether power supply is available from the high voltage battery (110) as shown in step (510). If the VCU (104) determines that the high voltage battery (110) power supply is available, then the VCU (104) turns off all the auxiliary loads 5 relay to switch off the auxiliary loads (102) as shown in step (514) in order to charge the auxiliary battery (108). If the VCU (104) determines that the high voltage battery (110) power supply is not available, then the VCU (104) turns off the ignition and put the vehicle into stand still condition to charge the auxiliary battery (108). [048] If the VCU (104) determines that the vehicle ignition is not ON in step 10 (508), and also the high voltage battery (110) is charging at that time, then the VCU (104) lets the high voltage battery (110) to get charged as shown in step (512). If the VCU (104) determines that the high voltage battery (110) is not charging, then the VCU (104) turns off the auxiliary load relay and switches off the auxiliary loads (102) as shown in steps (512) and (514) and the VCU (104) commands the high 15 voltage battery (110) to charge the auxiliary battery (108). Thereafter, the VCU (104) determines if the voltage of the auxiliary battery (108) is greater than a predefined voltage as shown in step (516), and the predefined voltage being 12V. The VCU (104) then waits until the vehicle ignition is turned off as shown in step (518) and then stops charging of the auxiliary battery (108) as shown in step (520). 20 If the VCU (104) determines that the voltage of the auxiliary battery (108) is not greater than the predefined voltage, then the VCU (104) enables the high voltage battery (110) to continue charging the auxiliary battery (108).
[049] Various embodiments of the invention provides a charging control system and a method for charging of an auxiliary battery by the charging control system 25 based on one or more predetermined conditions in order to regulate the charging and discharging of the auxiliary battery and also to prevent depletion of the auxiliary battery due to overcharging.
[050] The present invention is a charging control system comprising a vehicle control unit, a high voltage battery, an auxiliary battery, and a converter. The vehicle 30 control unit is configured to regulate the turning on and off of a high voltage load
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and a low voltage load connected to the high voltage battery and the auxiliary battery respectively. Further one of the converter and the high voltage battery is configured to supply a predetermined voltage and current to the auxiliary battery for charging the auxiliary battery based on one or more predetermined conditions. [051] The present claimed invention solves the technical problem of prevention 5 of overcharging of a lithium ion battery and thereby preventing depletion of the chemicals of the lithium ion auxiliary battery.
[052] Specifically, the claimed charging control system and the method for charging the auxiliary battery charges the auxiliary battery in two different conditions by stepping down the battery voltage of the high voltage battery and 10 thereby prevents wastage of power supply from the high voltage battery.
[053] Additionally, in the charging control method, the VCU switches off all the auxiliary loads during charging of the auxiliary battery which reduces the load acting on the auxiliary battery and in turn increases the speed of charging of the auxiliary battery. 15
[054] Furthermore, the use of a pulse width modulation unit of the converter to reduce the voltage and current being supplied to the auxiliary battery replenishes the auxiliary battery without causing unwanted ionization of the lithium ion cells and thereby prevent chemical depletion of the auxiliary battery.
[055] The present invention also provides advantages of ease of charging and 20 increased longevity of the auxiliary battery and also reduces the need for constant replacement of the auxiliary battery. The present invention also increases the life of the auxiliary battery.
[056] In light of the above-mentioned advantages and the technical advancements provided by the disclosed charging control system and the charging 25 control method of the auxiliary battery by through reduced power supply from the converter prevents overcharging of the auxiliary battery, the claimed invention as discussed above is not routine, conventional, or well understood in the art, as the claimed invention enable the following solutions to the existing problems in conventional technologies. Further, the claimed invention clearly bring an 30 improvement in the configuration and method for charging the auxiliary battery
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without depleting the lithium ion cells and also by increasing the life span of the battery by preventing cell depletion of the lithium ions of the auxiliary battery as the claimed invention provide a technical solution to a technical problem. [057] While the present invention has been shown and described with reference to the foregoing preferred embodiments, it will be apparent to those skilled in the art 5 that changes in form, connection, and detail may be made therein without departing from the spirit and scope of the invention.
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Reference Numerals:
100 charging control system
102 auxiliary loads 5
104 vehicle control unit
106 converter
108 auxiliary battery
110 high voltage battery
112 high voltage loads 10
200 motor control unit
202 CAN controller and transceiver unit
204 communication getaway unit
206 input output unit of vehicle control unit
208 LIN controller and transceiver unit 15
210 Ethernet controller and transceiver unit
212 input output unit of converter
214 pulse width modulation unit
216 one or more power switches
218 one or more filters 20
220 high voltage terminals
222 battery management system of high voltage battery
224 lithium ion cells
300 sensor , Claims:I/We claim:
1. A charging control system (100), said charging control system (100) comprising:
a vehicle control unit (104);
a high voltage battery (110); 5
an auxiliary battery (108); and
a converter (106);
wherein said vehicle control unit (104) being configured to regulate turning on and off of a high voltage load (112) and an auxiliary load (102); 10
wherein one of said converter (106) and said high voltage battery (110) being configured to supply a predetermined voltage and current to said auxiliary battery (108) for charging said auxiliary battery (108) at one or more predetermined conditions.
2. The charging control system (100) as claimed in claim 1, wherein said one 15 or more predetermined conditions being one of a vehicle running condition and a vehicle stand still condition.
3. The charging control system (100) as claimed in claim 2, wherein said auxiliary battery (108) being charged by said converter (106) at said vehicle stand still condition, and wherein said auxiliary battery (108) being charged 20 by said high voltage battery (110) at said vehicle running condition.
4. The charging control system (100) as claimed in claim 1, wherein said vehicle control unit (104) comprising a motor control unit (200), a CAN controller and a transceiver unit (202), a communication gateway unit (204), an input output unit (206), a LIN controller and a transceiver unit (208), and 25 an ethernet and a transceiver unit (210).
5. The charging control system (100) as claimed in claim 1, wherein said converter (106) being a DC-DC converter, and wherein said converter (106) comprising an input output unit (212), one or more power switches (216), a pulse width modulator (214), and a filter (218). 30
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6. The charging control system (100) as claimed in claim 1, wherein said high voltage battery (110) comprising one or more high voltage terminals (220), and a battery management system (222), and wherein said high voltage battery (110) comprising of a plurality of Li-ion cells (224).
7. The charging control system (100) as claimed in claim 1, wherein said 5 vehicle control unit (104) being configured to determine a current state of charge value of said high voltage battery (110) and said auxiliary battery (108), and wherein said vehicle control unit (108) being configured to provide said current state of charge value of said auxiliary battery (108) to said converter (106). 10
8. The charging control system (100) as claimed in claim 5, wherein said converter (106) being configured to regulate a current and a voltage value to be supplied to said auxiliary battery (108) through said pulse width modulator (214), and wherein said converter (106) being configured to receive input from a sensor (300), and wherein said pulse width modulator 15 (214) being configured to decrease said current and said voltage value being supplied to said auxiliary battery (108).
9. The charging control system (100) as claimed in claim 6, wherein said sensor (300) being configured to detect a keyless starting of said vehicle (100), and wherein said sensor (300) being connected to said auxiliary 20 battery (108), and wherein said sensor (300) being configured to enable starting and stopping of said vehicle (100) irrespective of charging condition of said auxiliary battery (108).
10. The charging control system (100) as claimed in claim 2, wherein said vehicle control unit (104) being configured perform charging of said 25 auxiliary battery (108) in said vehicle stand still condition, through following steps:
determining (408), by said vehicle control unit (104), a vehicle speed being equal to zero and a vehicle side stand switch being ON;
waiting (410), said vehicle control unit (104) for a predefined time; 30
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turning off (412), by said vehicle control unit (104), said auxiliary loads (102);
setting (414), by said vehicle control unit (104), a charging voltage and current of said auxiliary battery (108);
enabling (416), by said vehicle control unit (104), said pulse width 5 modulation of said converter (106) through said pulse width modulator (214);
enabling (418), by said converter (106), charging of said auxiliary battery (108).
11. The charging control system (100) as claimed in claim 2, wherein said 10 vehicle control unit (104) being configured perform charging of said auxiliary battery (108) in said vehicle running condition, through following steps:
determining (508), by said vehicle control unit (104), a vehicle ignition being ON and said sensor (300) being ON; 15
determining (510), by said vehicle control unit (104) availability of power from said high voltage battery (110);
determining (512), by said vehicle control unit (104), when said high voltage battery (110) being not charging;
switching off (514), by said vehicle control unit (104), said auxiliary loads 20 (102);
12. enabling (518), by said vehicle control unit (104), charging of said auxiliary battery (108) using the power of the high voltage battery (110) until said vehicle ignition being OFF.A method for charging an auxiliary battery (108) by a charging control system (100) comprising steps of: 25
checking (404), by a vehicle control unit (104), a current state of charge value of said auxiliary battery (108);
determining (406), by said vehicle control unit (104), said current state of charge being less than a threshold voltage;
determining (408), by said vehicle control unit (104), one or more 30 predetermined conditions being satisfied, said one or more predetermined
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conditions being one of a vehicle running condition and a vehicle stand still condition;
enabling charging, by said vehicle control unit (104), of said auxiliary battery (108) by one of a high voltage battery (110) and a converter (106) based on said one or more predetermined conditions; 5
determining (420), by said vehicle control unit (104), said auxiliary battery voltage being greater than a predefined voltage (420);
stopping (424), by said vehicle control unit (104), charging of said auxiliary battery (108).
13. The method as claimed in claim 10, wherein charging of said auxiliary 10 battery (108) at said vehicle stand still condition comprising the steps of:
determining (408), by said vehicle control unit (104), a vehicle speed being equal to zero and a vehicle side stand switch being ON;
waiting (410), said vehicle control unit (104) for a predefined time;
turning off (412), by said vehicle control unit (104), auxiliary 15 loads (102);
setting (414), by said vehicle control unit (104), a charging voltage and current of said auxiliary battery (108);
enabling (416), by said vehicle control unit (104), a pulse width modulation of said converter (106) through said pulse width modulator 20 (214);
enabling (418), by said converter (106), charging of said auxiliary battery (108).
14. The method as claimed in claim 10, wherein charging of said auxiliary battery (108) at said vehicle running condition comprising the steps of: 25
determining (508), by said vehicle control unit (104), a vehicle ignition being ON and a sensor (300) being ON;
determining (510), by said vehicle control unit (104) availability of power from said high voltage battery (110);
determining (512), by said vehicle control unit (104), when said high 30 voltage battery (110) being not charging;
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switching off (514), by said vehicle control unit (104), said auxiliary loads (102);
enabling (518), by said vehicle control unit (104), charging of said auxiliary battery (108) using the power of the high voltage battery (110) until said vehicle ignition being OFF. 5
Dated 27th day of July 2023