Description:TECHNICAL FIELD
[0001] The present disclosure relates, in general, to a battery management system in a vehicle. Particularly, the present disclosure relates to a method of determining State of Health (SOH) of a battery in a vehicle.
BACKGROUND
[0002] In Electric Vehicles (EVs) and Hybrid Vehicles (HVs) estimation of State of Charge (SOC) of a battery and a State of Health (SOH) is essential for safe and reliable range estimation of EVs and HVs. However, in the conventional system it is not possible to perform a direct measurement of these states by any electrical gauge or by any other means. Instead, the SOC and SOH is estimated from the measured battery variables, such as the time-varying voltage and the charging/discharging current. Therefore, there is a need to estimate accurate SOC value and SOH of the battery.
[0003] The information disclosed in this background of the disclosure section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
SUMMARY
[0004] Disclosed herein is a method of determining State of Health (SOH) of a battery in a vehicle. The method comprises obtaining, by a battery management unit, one or more battery parameters of the battery during charging of the battery. Further, the method comprises determining a State of Charge (SOC) value based on the one or more battery parameters. Thereafter, the method comprises calculating an accumulated Ampere Hours (AH) when the SOC value is within a first predefined SOC value and a second predefined SOC value. Finally, the method comprises calculating a SOH of the battery based on the accumulated AH.
[0005] Further, the present disclosure relates to a battery management unit for determining State of Health (SOH) of a battery in a vehicle. The battery management unit comprises a microcontroller and a memory. The memory is communicatively coupled to the microcontroller and stores microcontroller-executable instructions, which on execution, cause the microcontroller to obtain one or more battery parameters of the battery during charging of the battery. Further, the instructions cause the microcontroller to determine a State of Charge (SOC) value based on the one or more battery parameters. Thereafter, the instructions cause the microcontroller to calculate an accumulated Ampere Hours (AH) when the SOC value is within a first predefined SOC value and a second predefined SOC value. Finally, the instructions cause the microcontroller to calculate a SOH of the battery based on the accumulated AH.
[0006] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0007] The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate exemplary embodiments and, together with the description, explain the disclosed principles. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system and/or methods in accordance with embodiments of the present subject matter are now described, by way of example only, and regarding the accompanying figures, in which:
[0008] FIG. 1A shows an overview of functioning of the proposed battery management unit, in accordance with some embodiments of the present disclosure.
[0009] FIG. 1B shows an exemplary graph of current and voltage during charging of a battery, in accordance with some embodiments of the present disclosure.
[0010] FIG. 2 shows a detailed block diagram of the proposed battery management unit, in accordance with some embodiments of the present disclosure.
[0011] FIG. 3A shows a flowchart illustrating a method of determining State of Health (SOH) of a battery in a vehicle, in accordance with some embodiments of the present disclosure.
[0012] FIG. 3B shows a flowchart illustrating a method of determining a State of Charge (SOC) value of the battery, in accordance with some embodiments of the present disclosure.
[0013] FIG. 4 shows a system level architecture of the vehicle, in accordance with some embodiments of the present disclosure.
[0014] It should be appreciated by those skilled in the art that any block diagrams herein represent conceptual views of illustrative systems embodying the principles of the present subject matter. Similarly, it will be appreciated that any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in computer readable medium and executed by a computer or processor, whether such computer or processor is explicitly shown.
DETAILED DESCRIPTION
[0015] In the present document, the word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment or implementation of the present subject matter described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
[0016] While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however that it is not intended to limit the disclosure to the specific forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
[0017] The terms “comprises”, “comprising”, “includes”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, device, or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a system or apparatus proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
[0018] In an embodiment, the present disclosure proposes a method and a battery management unit for determining State of Health (SOH) of a battery in a vehicle. In an embodiment, the present disclosure obtains one or more battery parameters of the battery during charging of the battery. The one or more battery parameters comprises at least one of a current value, a charging voltage value, and a temperature value of the battery. The present disclosure determines a State of Charge (SOC) value based on the one or more battery parameters. Further, the present disclosure comprises calculating an accumulated Ampere Hours (AH) when the SOC value is within a first predefined SOC value and a second predefined SOC value. Finally, the present disclosure comprises calculating a SOH of the battery based on the accumulated AH.
[0019] In other words, the present disclosure aims to determine State of Health (SOH) of a battery in a vehicle by calculating the AH when the SOC value is within a first predefined SOC value and a second predefined SOC value. That is, the proposed disclosure determines accurate SOH using the determined SOC value.
[0020] In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
[0021] FIG. 1A shows an overview of functioning of the proposed battery management unit in accordance with some embodiments of the present disclosure.
[0022] In an embodiment, a vehicle may be configured with a battery management unit 101 and the battery management unit 101 may be configured for determining State of Health 107 (SOH) of a battery in a vehicle. As an example, the vehicle may be a passenger vehicle such as a car, a van, a bus and/or a commercial vehicle such as pick-up trucks. In an embodiment, the battery management unit 101 may be a computing unit dedicated for determining SOH 107 of a battery in a vehicle. In an embodiment, an existing Battery Management System (BMS) of the vehicles may be upgraded to perform functionalities of the batter management unit 101, in accordance with the embodiments of the present disclosure. Alternatively, the battery management unit 101 may be configured on a remote system, such that the battery management unit 101 is communicatively connected to the vehicle (for example, via a wireless network and/or over Internet) for calculating the SOH 107 of the battery.
[0023] In an embodiment, the battery management unit 101 may be configured to obtain one or more battery parameters 105 of the battery during charging of the battery. In an embodiment, the one or more battery parameters 105 may comprise, without limiting to, at least one of a current value, a charging voltage value, and a temperature value of the battery. In an embodiment, the vehicle may be in charging mode.
[0024] In an embodiment, after obtaining the one or more parameters of the battery, the battery management unit 101 determines a State of Charge (SOC) value based on the one or more battery parameters 105. In an embodiment, the battery management system compares the charging voltage value with a predefined tipping point voltage value. The battery management system checks if the charging voltage value is greater than the predefined tipping point voltage value. As an example, the predefined tipping point voltage value may be 3.4V at cell level for a Lithium-ion phosphate cell chemistry. Further, the battery management system compares the current value with a predefined C- rate value and also compares the charging time of the battery with a predefined time. The battery management system checks if the current value is less than the predefined C-rate value or the charging time is equivalent to a predefined time. As an example, the predefined C-rate value may be C/40. In an embodiment, the battery management unit 101 obtains the SOC value using a reference voltage value when the above-mentioned conditions are met. The charging voltage value is used as the reference voltage. In an embodiment, the SOC value may be used for early transition from a Constant Current (CC) charging mode to a Constant Voltage (CV) charging mode. The SOC may be displayed to a user of the vehicle on a display of the infotainment system.
[0025] In an embodiment, after determining the SOC value, the battery management unit 101 calculates an accumulated Ampere Hours (AH) when the SOC value is found to be within a first predefined SOC value and a second predefined SOC value. In an embodiment, when the first predefined SOC value is reached, the battery management unit 101 determines if the temperature value of the battery is within a predefined temperature range and the charging voltage value is less than the predefined tipping point voltage value to consider calculation of accumulated AH. As an example, the predefined temperature range may be 25° Celsius (C) to 30°C. In an embodiment, when the second predefined SOC value is reached, the battery management unit 101 determines if the temperature value of the battery is within a predefined temperature range to consider calculation of accumulated AH.
[0026] In an embodiment, after calculating the accumulated AH, the battery management unit 101 calculates a SOH 107 of the battery based on the accumulated AH. In an embodiment, if the SOC value is less than the second predefined SOC value, the battery management unit 101, the SOH 107 of the battery remains same as the previous value. In an embodiment, when the SOC value is greater than the second predefined SOC value, the battery management unit 101 may calculate the SOH 107 of the battery. In an embodiment, if the new SOH 107 is updated and may be used for calculating the SOH 107 after a predefined duration. The SOH 107 may be displayed to a user of the vehicle on a display of the infotainment system.
[0027] FIG. 1B shows an exemplary graph of current, time and voltage during charging of a battery, in accordance with some embodiments of the present disclosure.
[0028] In an embodiment, a State of Charge (SOC) value may be used for early transition from a Constant Current (CC) charging mode to a Constant Voltage (CV) charging mode. As depicted in an exemplary graph, when the battery SOC is very low and a user of a vehicle plugs in the charger, the battery management unit 101 starts charging in CC charging mode. In an embodiment, at a predefined transition point voltage, the charging mode switches from CC mode to CV mode. In an embodiment, an accurate SOC value helps in an early transition. In an embodiment, during the early CV mode at end of charge, a plurality of cells in the battery may be charged voluntarily based on an individual current accepting capabilities of each cell in the plurality of cells. In an embodiment, as the SOC value of the battery increases, the resistance of each of the plurality of cells may also increase. In an embodiment, the cells with the lower resistance may charge at a faster rate than the cells with higher resistance in the CV mode.
[0029] FIG. 2 shows a detailed block diagram of a battery management unit 101, in accordance with some embodiments of the present disclosure.
[0030] In an embodiment, the battery management unit 101 may include an I/O Interface 201, a microcontroller 103 and a memory 203. The microcontroller 103 may be configured to perform one or more functions of the battery management unit 101 for determining State of Health 107 (SOH) of a battery in a vehicle, using the data 205 and the one or more modules 207 in stored in a memory 203 of the battery management unit 101. The I/O interface 201 may be coupled with the battery management unit 101 for receiving and transmitting an input signal or/and an output signal related to one or more operations of the battery management unit 101. In an embodiment, the memory 203 may store data 205 and one or more modules 207.
[0031] In an embodiment, the data 205 stored in the memory 203 may include, without limitation, values/texts related to one or more battery parameters 105, a State of Health 107 (SOH) 107, a State of Charge (SOC) value 209, an accumulated Ampere Hours (AH) 211, a first predefined SOC value 213, a second predefined SOC value 215 and other data 217. In some implementations, the data 205 may be stored within the memory 203 in the form of various data structures. Additionally, the data 205 may be organized using data models, such as relational or hierarchical data models. The other data 217 may include various temporary data and files generated by the different components of the battery management unit 101.
[0032] In an embodiment, the one or more battery parameters 105 may be parameters associated with a battery of a vehicle. In an embodiment, the one or more parameters may comprise, without limiting to, at least one of a current value, a charging voltage value, and a temperature value of the battery.
[0033] In an embodiment, the State of Health 107 (SOH) 107 is a value indicating the condition of a battery compared to its ideal conditions. In an embodiment, the battery management unit 101 calculates the SOH 107 using an accumulated Ampere Hours (AH 211) calculated when the State of Charge (SOC) value is within a first predefined SOC value 213 and a second predefined SOC value 215. In an embodiment, the SOH 107 may be displayed to a user of a vehicle in units of AH 211 and/or percentage (%).
[0034] In an embodiment, the SOC value 209 is a measurement of an amount of energy available in the battery at a specific point in time.. In an embodiment, the SOC value 209 may be displayed to a user of a vehicle in units percentage (%). In an embodiment, the SOC value 209 may be used to calculate an accumulated Ampere Hours 211 (AH) when the SOC value 209 is within a first predefined SOC value 213 and a second predefined SOC value 215.
[0035] In an embodiment, the accumulated AH 211 is a value of charge accumulated during charging in a battery of the vehicle. In an embodiment, the accumulated AH 211 may be used to calculate the SOH 107 of the battery.
[0036] In an embodiment, the first predefined SOC value 213 is a value associated with SOH 107 estimation. In an embodiment, when the SOC value 209 is above the first predefined SOC value 213, then the battery management system starts calculating the accumulated AH 211 for SOH 107 calculation. As an example, the first predefined SOC value 213 may be 20% SOC.
[0037] In an embodiment, the second predefined SOC value 215 is a value associated with SOH 107 estimation. In an embodiment, when the SOC value 209 is reaches the second predefined SOC value 215, then the battery management system calculates the SOH 107 of the battery based on the accumulated AH 211. As an example, the second predefined SOC value 215 may be 80% SOC.
[0038] In an embodiment, the data 205 may be processed by the one or more modules 207 of the battery management unit 101. In some implementations, the one or more modules 207 may be communicatively coupled to the microcontroller 103 for performing one or more functions of the battery management unit 101. In an implementation, the one or more modules 207 may include, without limiting to, an obtaining module 219, a determining module 221, a calculating module 223 and other modules 225. In an embodiment, the other modules 225 may be used to perform various miscellaneous functionalities of the battery management unit 101. It will be appreciated that such one or more modules 207 may be represented as a single module or a combination of different modules.
[0039] In an embodiment, the obtaining module 219 may be configured for obtaining one or more battery parameters 105 of the battery during charging of the battery. In an embodiment, the one or more parameters may be obtained using a Battery Management System (BMS) slave using a predefined wiring scheme. As an example, the predefined wiring scheme may be, without limiting to, a Daisy chain wiring scheme and the like.
[0040] In an embodiment, the determining module 221 may be configured for determining a State of Charge (SOC) value 209 based on the one or more battery parameters 105. The determining module 221 checks if the charging voltage value is greater than the predefined tipping point voltage value. In an embodiment, the determining module 221 further checks if the current value is less than the predefined C-rate value or the charging time of the battery is equivalent to a predefined time. In an embodiment, the determining module 221 obtains the SOC value 209 using a reference voltage value when one or more of the above-mentioned conditions are met.
[0041] In an embodiment, the calculating module 223 may be configured for calculating an accumulated Ampere Hours 211 (AH) when the SOC value 209 is within a first predefined SOC value 213 and a second predefined SOC value 215. Further, the calculating module 223 may be configured for calculating a SOH 107 of the battery based on the accumulated AH 211.
[0042] FIG. 3A shows a flowchart illustrating a method of determining State of Health 107 (SOH) of a battery in a vehicle, in accordance with some embodiments of the present disclosure.
[0043] As illustrated in FIG. 3A, the method 300 may include one or more blocks illustrating a method of determining State of Health 107 (SOH) of a battery in a vehicle. The method 300 may be described in the general context of computer executable instructions. Generally, computer executable instructions can include routines, programs, objects, components, data structures, procedures, modules, and functions, which perform specific functions or implement specific abstract data types.
[0044] The order in which the method 300 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. Additionally, individual blocks may be deleted from the methods without departing from the scope of the subject matter described herein. Furthermore, the method can be implemented in any suitable hardware, software, firmware, or combination thereof.
[0045] At block 301, the method 300 includes obtaining, by a battery management unit 101, one or more battery parameters 105 of the battery during charging of the battery. In an embodiment, the one or more battery parameters 105 comprises at least one of a current value, a charging voltage value and a temperature value of the battery.
[0046] At block 303, the method 300 includes determining, by the battery management unit 101, a State of Charge (SOC) value based on the one or more battery parameters 105. In an embodiment, determining the SOC value 209 may also comprise, obtaining the one or more battery parameters 105. Further, determining the SOC value 209 may also comprise, comparing the charging voltage with the predefined tipping point voltage value. Furthermore, determining the SOC value 209 may also comprise, comparing a current value with a predefined C- rate value and comparing charging time with a predefined time. Finally, obtaining the SOC value 209 using a reference voltage, wherein the charging voltage value is used as the reference voltage when charging voltage cross the tipping voltage and at least one of current value is less than the predefined C-rate value and the charging time is same as the predefined time. In an embodiment, the SOC value 209 may be used for early transition from a Constant Current (CC) charging mode to a Constant Voltage (CV) charging mode.
[0047] At block 305, the method 300 includes calculating, by the battery management unit 101, an accumulated Ampere Hours 211 (AH) when the SOC value 209 is within a first predefined SOC value 213 and a second predefined SOC value 215. In an embodiment, to calculate accumulated AH, when the first predefined SOC value 213 is reached, determining if the temperature value of the battery is within a predefined temperature range and the charging voltage value is less than a tipping point voltage value. In an embodiment, to calculate accumulated AH, when the second predefined SOC value 215 is reached, determining if the temperature value of the battery is within a predefined temperature range.
[0048] At block 307, the method 300 includes calculating, by the battery management unit 101, a SOH 107 of the battery based on the accumulated AH 211. In an embodiment, calculating the SOH 107 may comprise comparing the AH 211 accumulated with at least one of a Beginning of Life (BOL) capacity or a previously determined AH 211.
[0049] FIG. 3B shows a flowchart illustrating a method of determining the SOC value 209, in accordance with some embodiments of the present disclosure.
[0050] In an embodiment, at step 321, one or more battery parameters 105 are obtained. In an embodiment, the one or more battery parameters 105 may comprise, without limiting to, at least one of a current value, a charging voltage value, and a temperature value of the battery. Further, the battery management system may also obtain a fully charged voltage at an end of a tapered charging current. At step 323, the battery management system compares the one or more parameters with the predefined values. In an embodiment, the battery management system checks whether the charging voltage value is greater than the tipping point voltage value and the current value is less than the predefined C-rate or charging time is equals a predefined time. As an example, the predefined C-rate may be, without limiting to, C/40. In an embodiment, if the conditions are not met, a State of Charge 209 (SOC) value is not calibrated (step 325). Alternatively, if the conditions are satisfied, the SOC value 209 is obtained using a reference voltage value (step 327). In an embodiment, the charging voltage value may be used as the reference voltage to obtain the SOC value 209.
[0051] FIG. 4 shows a system level architecture of the vehicle, in accordance with some embodiments of the present disclosure.
[0052] In an embodiment, an existing Batter Management System (BMS) master 401 may comprise the proposed battery management unit 101. Also, the BMS master 401 may comprise a current measurement unit. In an embodiment, the current measurement unit may be used to measure current and provide current values. In an embodiment, a BMS slave 405 may be used to provide one or more battery parameters 105 of the battery to the BMS master 401 using a a predefined wiring scheme. As an example, the predefined wiring scheme may be, without limiting to, a Daisy chain wiring scheme and the like. In an embodiment, the battery management unit 101 may determine the State of Charge (SOC) value 209 of the battery using the one or more battery parameters 105. Further, the battery management unit 101 may calculate an accumulated Ampere Hours 211 (AH) when the SOC value 209 is within a first predefined SOC value 213 and a second predefined SOC value 215. In an embodiment, a SOH 107 of the battery may be calculated based on the accumulated AH 211. The BMS master 401 may communicate with a Vehicle Control Unit (VCU) 411 using a Controller Area Network (CAN) communication 413. In an embodiment, the VCU 411 may display the SOH 107 of the High Voltage (HV) battery 407 and SOC of the HV battery 407 on a display of an infotainment system in a vehicle. In an embodiment, the VCU 411 may also provide torque coordination, operation and gearshift strategies, high-voltage coordination, charging control, on board diagnosis, monitoring, thermal management and the like.
[0053] In an embodiment, a HV battery 407 may be used to provide electricity to power at least one of an Electric Vehicle (EV) or a Hybrid Vehicle (HV). As an example, the vehicle may be, without limiting to, a passenger vehicle such as a car, a van, a bus and/or a commercial vehicle such as pick-up trucks. In an embodiment, an auxiliary battery 409 may be used to provide electricity to power one or more vehicle accessories. As an example, the one or more vehicle accessories may comprise, without limiting to, the BMS master 401 and the like. In an embodiment, a power distribution unit 415 distributes the battery power to the high-voltage components of the vehicle. As an example, the high-voltage components of the vehicle may be, without limiting to, the motor controller unit, accessory motor controller and the like. The power distribution unit may also supply power to the loads 417. In an embodiment, the charge port 419 allows the vehicle to connect to an external power supply to charge the battery in the vehicle.
Advantages of the embodiments of the present disclosure are illustrated herein.
[0054] In an embodiment, the present disclosure determines State of Charge (SOC) of the battery. This helps in early transition from a Constant Current (CC) charging mode to a Constant Voltage (CV) charging mode. Further, this helps in improving cell balancing.
[0055] In an embodiment, the present disclosure calculates State of Health (SOH) using SOC value. This helps in calculating accurate SOH. Further, the SOH calculation is compatible with any SOC estimation approach.
[0056] In light of the technical advancements provided by the disclosed method and the battery management unit, the claimed steps, as discussed above, are not routine, conventional, or well-known aspects in the art, as the claimed steps provide the aforesaid solutions to the technical problems existing in the conventional technologies. Further, the claimed steps clearly bring an improvement in the functioning of the system itself, as the claimed steps provide a technical solution to a technical problem.
[0057] The terms "an embodiment", "embodiment", "embodiments", "the embodiment", "the embodiments", "one or more embodiments", "some embodiments", and "one embodiment" mean "one or more (but not all) embodiments of the invention(s)" unless expressly specified otherwise.
[0058] The terms "including", "comprising", “having” and variations thereof mean "including but not limited to", unless expressly specified otherwise.
[0059] The enumerated listing of items does not imply that any or all the items are mutually exclusive, unless expressly specified otherwise. The terms "a", "an" and "the" mean "one or more", unless expressly specified otherwise.
[0060] A description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the invention.
[0061] When a single device or article is described herein, it will be clear that more than one device/article (whether they cooperate) may be used in place of a single device/article. Similarly, where more than one device/article is described herein (whether they cooperate), it will be clear that a single device/article may be used in place of the more than one device/article or a different number of devices/articles may be used instead of the shown number of devices or programs. The functionality and/or features of a device may be alternatively embodied by one or more other devices which are not explicitly described as having such functionality/features. Thus, other embodiments of invention need not include the device itself.
[0062] Finally, the language used in the specification has been principally selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter. It is therefore intended that the scope of the invention be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present invention are intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims.
[0063] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Referral Numerals:
Reference Number Description
101 Battery management unit
103 Microcontroller
105 Battery parameters
107 State of Health (SOH)
201 I/O Interface
203 Memory
205 Data
207 Modules
209 State of Charge (SOC)
211 Ampere Hours (AH)
213 First predefined SOC value
215 Second predefined SOC value
217 Other data
219 Obtaining module
221 Determining module
223 Calculating module
225 Other modules
400 Vehicle level system architecture
401 Battery Management System (BMS) Master
403 Current measurement
405 BMS slave
407 High Voltage (HV) battery
409 Auxiliary battery
411 Vehicle Control Unit (VCU)
413 Controller Area Network (CAN) communication
415 Power distribution unit
417 Loads
419 Charge port
, Claims:WE CLAIM:

1. A method of determining State of Health (SOH) of a battery in a vehicle, the method comprising:
obtaining, by a battery management unit, one or more battery parameters of the battery during charging of the battery;
determining, by the battery management unit, a State of Charge (SOC) value based on the one or more battery parameters;
calculating, by the battery management unit, an accumulated Ampere Hours (AH) when the SOC value is within a first predefined SOC value and a second predefined SOC value; and
calculating, by the battery management unit, a SOH of the battery based on the accumulated AH.

2. The method as claimed in claim 1, wherein the one or more battery parameters comprises at least one of a current value, a charging voltage value, and a temperature value of the battery.

3. The method as claimed in claim 1, wherein determining the SOC value comprises:
obtaining the one or more battery parameters;
comparing the charging voltage value with a predefined tipping point voltage value;
comparing the current value with a predefined C- rate value;
comparing charging time with a predefined time; and
obtaining the SOC value using a reference voltage value, wherein the charging voltage value is used as the reference voltage when charging voltage cross the tipping voltage and at least one of current value is less than predefined C-rate value and charging time is same as predefined time.

4. The method as claimed in claim 1, wherein when the first predefined SOC value is reached, determining if the temperature value of the battery is within a predefined temperature range and the charging voltage value is less than a predefined tipping point voltage value.

5. The method as claimed in claim 1, wherein when the second predefined SOC value is reached, determining if the temperature value of the battery is within a predefined temperature range.

6. The method as claimed in claim 1, wherein calculating the SOH comprises:
comparing the AH accumulated with at least one of a Beginning of Life (BOL) capacity or a previously determined AH.
7. A battery management unit to estimate State of Health (SOH) of a battery in a vehicle, the battery management unit comprising:
a microcontroller; and
a memory, communicatively coupled to the microcontroller, wherein the memory stores processor-executable instructions, which, on execution, causes the microcontroller to:
obtain one or more battery parameters of the battery during charging of the battery;
determine a State of Charge (SOC) value based on the one or more battery parameters;
calculate an accumulated Ampere Hours (AH) when the SOC value is within a first predefined SOC value and a second predefined SOC value; and
calculate a SOH of the battery based on the accumulated AH.

8. The battery management unit as claimed in claim 8, wherein the one or more battery parameters comprises at least one of a current value, a charging voltage value and a temperature value of the battery.

9. The battery management unit as claimed in claim 8, wherein determining the SOC value by the microcontroller comprises:
Obtaining the one or more battery parameters;
comparing the charging voltage value with a predefined tipping point voltage value;
comparing the current value with a predefined C- rate value;
comparing charging time with a predefined time; and
obtaining the SOC value using a reference voltage value, wherein the charging voltage value is used as the reference voltage when charging voltage cross the tipping voltage and at least one of current value is less than predefined c-rate value and charging time is same as predefined time.

10. The battery management unit as claimed in claim 8, wherein when the first predefined SOC value is reached, the microcontroller determines if the temperature value of the battery is within a predefined temperature range and the charging voltage value is less than a tipping point voltage value.

11. The battery management unit as claimed in claim 8, wherein when the second predefined SOC value is reached, the microcontroller determines if the temperature value of the battery is within a predefined temperature range.

12. The battery management unit as claimed in claim 8, wherein calculating the SOH by the microcontroller comprises:
comparing the AH accumulated with at least one of a Beginning of Life (BOL) capacity or a previously determined AH.