Battery SOC full correction method and related device

Abstract

The present application provides a full charge correction method and related device for the SOC of a battery. The method includes: monitoring the full charge of all single cells in the battery; if it is monitored that any single cell in the battery is in a full charge state, then subtracting the voltage value of the single cell in an unfull charge state from the full charge cut-off voltage to obtain the voltage difference corresponding to each single cell in an unfull charge state; for each single cell in an unfull charge state, if the voltage difference corresponding to the single cell is less than the voltage sensor acquisition error, then correcting the SOC value of the single cell to the full scale value. Through the above scheme, the present application can not only avoid the problem of over-discharge during discharge of the cell due to forcibly correcting the SOC of the single cell to 100% due to excessive pressure difference, but also avoid the problem of inaccurate SOC of the cell due to failure to perform full charge correction on the cell.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery SOC full charge correction method and related devices. Background Art

[0002] In the battery management system, the battery state of charge (SOC) is a very important battery parameter. SOC represents the percentage of the remaining charge of the battery pack and is used to measure the remaining available capacity of the battery pack. Accurate SOC estimation can ensure the relevant strategies of the entire vehicle, the safety of the battery, and the experience of the driver and passengers.

[0003] In the SOC estimation algorithm, the full charge correction algorithm is the main algorithm for the battery charging terminal. Its advantages are simple calculation method, reliable data, and can return the SOC estimation to an error-free state. In the prior art, due to the voltage difference between the individual cells of the battery pack at the charging end, when the full charge correction is used, if any single cell meets the full charge condition, the SOC of all the single cells in the battery pack is set to 100; however, the disadvantage of this method is that if the low-voltage cell is forcibly set to 100, it will cause the cell to be over-discharged during the later discharge. Summary of the invention

[0004] The present application provides a battery SOC full charge correction method and related devices to solve the problem of inaccurate battery full charge correction.

[0005] In a first aspect, the present application provides a method for fully correcting a battery SOC, comprising:

[0006] Fully monitor all the cells in the battery;

[0007] If it is monitored that any single cell in the battery is in a full state, the voltage value of the single cell in an unfull state is subtracted from the full cut-off voltage to obtain the voltage difference value corresponding to each single cell in an unfull state;

[0008] For each single cell in an incomplete state, if the voltage difference corresponding to the single cell is less than the voltage sensor acquisition error, the SOC value of the single cell is corrected to the full-scale value.

[0009] In a possible embodiment, the full charge monitoring of all single cells in the battery includes:

[0010] Obtaining the voltage value of each single cell in the battery;

[0011] For each single cell, if the voltage value of the single cell reaches the full charge cut-off voltage, it is determined that the single cell is in a full charge state; otherwise, it is determined that the single cell is in an unfull charge state.

[0012] In a possible embodiment, the full charge monitoring of all single cells in the battery includes:

[0013] Obtaining the SOC value of each single cell in the battery;

[0014] For each single cell, if the SOC value of the single cell is equal to the full-scale value, it is determined that the single cell is in a fully charged state; otherwise, it is determined that the single cell is in an undercharged state.

[0015] In a possible embodiment, the method further includes:

[0016] For each single cell in an under-charged state, if the voltage difference corresponding to the single cell is greater than the voltage sensor acquisition error, the SOC value of the single cell is kept unchanged.

[0017] In a second aspect, the present application provides a battery SOC full correction device, comprising:

[0018] Full charge monitoring module, used to monitor the full charge of all single cells in the battery;

[0019] A voltage difference calculation module is used to calculate the voltage difference corresponding to each monomer cell in the not-full state by subtracting the voltage value of the monomer cell in the not-full state from the full cut-off voltage if it is detected that any monomer cell in the battery is in the full state;

[0020] The full charge correction module is used to correct the SOC value of each single cell in an unfull state to the full scale value if the voltage difference corresponding to the single cell is less than the voltage sensor acquisition error.

[0021] In a possible embodiment, the fullness monitoring module specifically includes:

[0022] Obtaining the voltage value of each single cell in the battery;

[0023] For each single cell, if the voltage value of the single cell reaches the full charge cut-off voltage, it is determined that the single cell is in a full charge state; otherwise, it is determined that the single cell is in an unfull charge state.

[0024] In a possible embodiment, the fullness monitoring module specifically includes:

[0025] Obtaining the SOC value of each single cell in the battery;

[0026] For each single cell, if the SOC value of the single cell is equal to the full-scale value, it is determined that the single cell is in a fully charged state; otherwise, it is determined that the single cell is in an undercharged state.

[0027] In a possible embodiment, the battery SOC full correction device further includes:

[0028] The SOC maintaining module is used for maintaining the SOC value of each single cell in an uncharged state unchanged if the voltage difference corresponding to the single cell is greater than the voltage sensor acquisition error.

[0029] In a third aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the processor implements the steps of the method described in any possible implementation of the first aspect above.

[0030] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described in any possible implementation of the first aspect above are implemented.

[0031] In a fifth aspect, an embodiment of the present application provides a car, comprising the electronic device as described in the third aspect above.

[0032] The embodiment of the present application provides a method for full charge correction of the SOC of a battery, which first monitors the full charge of all the single cells in the battery; if it is monitored that any single cell in the battery is in a full charge state, the voltage value of the single cell in an unfull charge state is subtracted from the full charge cut-off voltage to obtain the voltage difference corresponding to each single cell in an unfull charge state; for each single cell in an unfull charge state, if the voltage difference corresponding to the single cell is less than the voltage sensor acquisition error, the SOC value of the single cell is corrected to the full scale value. Through the above scheme, the embodiment of the present application can not only avoid the problem of over-discharge when the single cell is discharged due to the excessive pressure difference forcibly correcting the SOC of the single cell to 100%, but also avoid the problem of inaccurate SOC of the cell due to failure to perform full charge correction on the cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1is a flow chart of the implementation of the battery SOC full correction method provided in the embodiment of the present application;

[0035] Figure 2 is a schematic structural diagram of a battery SOC full correction device provided in an embodiment of the present application;

[0036] Figure 3 It is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0038] In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0039] See also Figure 1 , which shows a flow chart of the implementation of the battery SOC full correction method provided by the embodiment of the present application, which is described in detail as follows:

[0040] S101: Fully monitor all the single cells in the battery.

[0041] The execution subject (electronic device) of this embodiment may be a battery management system.

[0042] Specifically, during the battery charging process, the battery management system can monitor the voltage value and current value of each single cell in the battery in real time, and monitor the full charge of the corresponding single cell through the voltage value and / or current value.

[0043] S102: If it is detected that any single cell in the battery is in a fully charged state, the voltage value of the single cell in an incomplete state is subtracted from the full charge cut-off voltage to obtain the voltage difference value corresponding to each single cell in an incomplete state.

[0044] In this embodiment, after the single cell with the highest charge in the battery is fully charged, the battery management system collects the voltage value of each single cell in the battery through a voltage sensor, and then subtracts the voltage value of each single cell from the full charge cut-off voltage (which can be the voltage value of the single cell with the highest charge) to obtain the voltage difference between each single cell and the single cell with the highest charge.

[0045] S103: For each battery cell that is not fully charged, if the voltage difference corresponding to the battery cell is less than the voltage sensor acquisition error, the SOC value of the battery cell is corrected to the full-scale value.

[0046] In this embodiment, the voltage sensor acquisition error is a preset hardware parameter of the voltage sensor. Since the voltage sensor will have an acquisition error when acquiring the voltage value of a single cell, this error is inevitable. Therefore, if the difference between the voltage value of the single cell and the charging cut-off voltage is small, then the difference is likely to be caused by the voltage sensor acquisition error. In order to avoid the voltage difference caused by the acquisition error, this embodiment corrects the SOC value of the single cell whose voltage difference is less than the voltage sensor acquisition error to the full-scale value of 100%.

[0047] As can be seen from the above embodiments, the embodiments of the present application provide a method for full correction of the SOC of a battery, which first monitors the fullness of all the single cells in the battery; if it is monitored that any single cell in the battery is in a full state, the voltage value of the single cell in an unfull state is subtracted from the full cut-off voltage to obtain the voltage difference corresponding to each single cell in an unfull state; for each unfull single cell, if the voltage difference corresponding to the single cell is less than the voltage sensor acquisition error, the SOC value of the single cell is corrected to the full scale value. This embodiment determines whether to correct the SOC value of the single cell by using the voltage sensor acquisition error as a voltage difference judgment standard, which can not only avoid the problem of over-discharge when the cell is discharged due to the excessive pressure difference forcibly correcting the SOC of the single cell to 100%, but also avoid the problem of inaccurate SOC of the cell due to failure to fully calibrate the cell.

[0048] In a possible embodiment, the specific implementation process of S101 includes:

[0049] Get the voltage value of each single cell in the battery;

[0050] For each single cell, if the voltage value of the single cell reaches the full charge cut-off voltage, it is determined that the single cell is in a full charge state; otherwise, it is determined that the single cell is in an unfull charge state.

[0051] In this embodiment, each type of battery is preset with its corresponding full charge cut-off voltage. When the voltage value of the battery reaches the full charge cut-off voltage, it indicates that the battery is fully charged.

[0052] In a possible embodiment, another possible implementation process of S101 may include:

[0053] Get the SOC value of each single cell in the battery;

[0054] For each single cell, if the SOC value of the single cell is equal to the full-scale value, it is determined that the single cell is in a fully charged state; otherwise, it is determined that the single cell is in an undercharged state.

[0055] In this embodiment, the SOC value of each single battery cell can be calculated based on a conventional SOC estimation method such as an ampere-hour integration algorithm, a Kalman filter method, or a neural network method.

[0056] In this embodiment, if the voltage value of a single cell reaches the full charge cut-off voltage, the battery management system will set the SOC value of the single cell to the full-scale value of 100%. Therefore, this embodiment can also determine whether the single cell is full by monitoring whether the SOC value of the single cell reaches the full-scale value. If a single cell is full, the voltage difference between the voltage value of each unfull single cell and the full charge cut-off voltage is calculated to determine whether the cell SOC needs to be corrected.

[0057] In a possible embodiment, the battery SOC full correction method provided in this embodiment further includes:

[0058] For each single cell in an incomplete state, if the voltage difference corresponding to the single cell is greater than the voltage sensor acquisition error, the SOC value of the single cell is kept unchanged.

[0059] In one embodiment of the present application, in order to improve the accuracy of full charge correction, the present embodiment can obtain the open circuit voltage of each single cell in the static stage after the battery is fully charged, and then determine the real SOC value of each single cell by searching the OCV (Open circuit voltage)-SOC curve, and compare the full charge corrected SOC value of each single cell with the real SOC value, and judge whether the difference between the corrected SOC value of each single cell at the end of charging and the real SOC is less than the first preset difference. If it is less than, it means that the correction is correct. If the difference between the corrected SOC value and the real SOC is not less than the first preset difference, it means that the correction is wrong. If there is a single cell whose SOC value is greater than the first preset difference due to full charge correction in multiple charging cycles and the real SOC value calculated by the OCV-SOC curve after full charge, then the method of S101 to S103 will not be used for full charge correction in the next charging cycle.

[0060] Specifically, the first preset threshold is smaller than the voltage sensor acquisition error.

[0061] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0062] The following is an embodiment of the device of the present application. For details not described in detail, please refer to the corresponding method embodiment described above.

[0063] Figure 2 The structure diagram of the battery SOC full correction device 100 provided in the embodiment of the present application is shown. For the convenience of description, only the part related to the embodiment of the present application is shown, which is described in detail as follows:

[0064] like Figure 2 As shown, the battery SOC full correction device 100 includes:

[0065] A full charge monitoring module 110 is used to monitor the full charge of all single cells in the battery;

[0066] The voltage difference calculation module 120 is used to obtain the voltage difference corresponding to each monomer cell in the not-full state by subtracting the voltage value of the monomer cell in the not-full state from the full cut-off voltage if it is detected that any monomer cell in the battery is in the full state;

[0067] The full charge correction module 130 is used to correct the SOC value of each single cell in an incomplete state to a full-scale value if the voltage difference corresponding to the single cell is less than the voltage sensor acquisition error.

[0068] In a possible embodiment, the fullness monitoring module 110 specifically includes:

[0069] Get the voltage value of each single cell in the battery;

[0070] For each single cell, if the voltage value of the single cell reaches the full charge cut-off voltage, it is determined that the single cell is in a full charge state; otherwise, it is determined that the single cell is in an unfull charge state.

[0071] In a possible embodiment, the fullness monitoring module 110 specifically includes:

[0072] Get the SOC value of each single cell in the battery;

[0073] For each single cell, if the SOC value of the single cell is equal to the full-scale value, it is determined that the single cell is in a fully charged state; otherwise, it is determined that the single cell is in an undercharged state.

[0074] In a possible embodiment, the battery SOC full correction device 100 further includes:

[0075] The SOC maintaining module is used to maintain the SOC value of each single cell in an uncharged state unchanged if the voltage difference corresponding to the single cell is greater than the voltage sensor acquisition error.

[0076] From the above embodiments, it can be known that the embodiments of the present application first monitor the full charge of all the single cells in the battery; if it is monitored that any single cell in the battery is in a full state, the voltage value of the single cell in an unfull state is subtracted from the full charge cut-off voltage to obtain the voltage difference corresponding to each single cell in an unfull state; for each unfull single cell, if the voltage difference corresponding to the single cell is less than the voltage sensor acquisition error, the SOC value of the single cell is corrected to the full scale value. Through the above scheme, the embodiments of the present application can not only avoid the problem of over-discharge when the single cell is discharged due to the excessive pressure difference forcibly correcting the SOC of the single cell to 100%, but also avoid the problem of inaccurate SOC of the cell due to failure to fully calibrate the cell.

[0077] The present application also provides a computer program product having a program code, which executes the steps of any of the above-mentioned battery SOC full correction method embodiments when the program code is executed in a corresponding processor, controller, computing device or electronic device, such as Figure 1 Steps 101 to 103 shown. It will be appreciated by those skilled in the art that the method and the device proposed in the embodiment of the present application can be implemented in various forms of hardware, software, firmware, a dedicated processor or a combination thereof. The dedicated processor may include an application specific integrated circuit (ASIC), a reduced instruction set computer (RISC) and / or a field programmable gate array (FPGA). The proposed method and device are preferably implemented as a combination of hardware and software. The software is preferably installed on a program storage device as an application. It is typically based on a machine with a computer platform having hardware, such as one or more central processing units (CPUs), random access memories (RAMs) and one or more input / output (I / O) interfaces. An operating system is also typically installed on a computer platform. The various processes and functions described herein may be part of an application, or a part thereof may be executed by an operating system.

[0078] Figure 3 Schematic diagram of an electronic device provided in an embodiment of the present application. Figure 3 As shown, the electronic device 3 of this embodiment includes: a processor 30, a memory 31, and a computer program 32 stored in the memory 31 and executable on the processor 30. When the processor 30 executes the computer program 32, the steps in the above-mentioned various battery SOC full correction method embodiments are implemented, such as Figure 1 Alternatively, when the processor 30 executes the computer program 32, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 2 Functionality of modules / units 110 to 130 is shown.

[0079] Exemplarily, the computer program 32 may be divided into one or more modules / units, one or more modules / units are stored in the memory 31, and are executed by the processor 30 to complete / implement the solution provided by the present application. One or more modules / units may be a series of computer program instruction segments that can complete specific functions, and the instruction segments are used to describe the execution process of the computer program 32 in the electronic device 3. For example, the computer program 32 may be divided into Figure 2 Modules 110 to 130 are shown.

[0080] The electronic device 3 may include, but is not limited to, a processor 30 and a memory 31. Those skilled in the art will appreciate that Figure 3 It is only an example of the electronic device 3 and does not constitute a limitation of the electronic device 3. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0081] The processor 30 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0082] The memory 31 may be an internal storage unit of the electronic device 3, such as a hard disk or memory of the electronic device 3. The memory 31 may also be an external storage device of the electronic device 3, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device 3. Further, the memory 31 may also include both an internal storage unit of the electronic device 3 and an external storage device. The memory 31 is used to store computer programs and other programs and data required by the electronic device. The memory 31 may also be used to temporarily store data that has been output or is to be output.

[0083] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0084] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0085] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0086] In the embodiments provided in the present application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0087] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0088] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0089] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can be executed by the processor to implement the steps of the above-mentioned various battery SOC full correction method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0090] In addition, the embodiments shown in the drawings of the present application or the features of the various embodiments mentioned in this specification are not necessarily understood as independent embodiments. Instead, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the drawings.

[0091] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for fully correcting a battery SOC, characterized in that: include: Fully monitor all the cells in the battery; If it is monitored that any single cell in the battery is in a full state, the voltage value of the single cell in an unfull state is subtracted from the full cut-off voltage to obtain the voltage difference value corresponding to each single cell in an unfull state; For each single cell in an incomplete state, if the voltage difference corresponding to the single cell is less than the voltage sensor acquisition error, the SOC value of the single cell is corrected to the full-scale value; The method further comprises: For each single cell in an under-charged state, if the voltage difference corresponding to the single cell is greater than the voltage sensor acquisition error, the SOC value of the single cell is kept unchanged.

2. The method for fully correcting the battery SOC according to claim 1, characterized in that: The full charge monitoring of all single cells in the battery includes: Obtaining the voltage value of each single cell in the battery; For each single cell, if the voltage value of the single cell reaches the full charge cut-off voltage, it is determined that the single cell is in a full charge state; otherwise, it is determined that the single cell is in an unfull charge state.

3. The method for fully correcting the battery SOC according to claim 1, characterized in that: The full charge monitoring of all single cells in the battery includes: Obtaining the SOC value of each single cell in the battery; For each single cell, if the SOC value of the single cell is equal to the full-scale value, it is determined that the single cell is in a fully charged state; otherwise, it is determined that the single cell is in an undercharged state.

4. A battery SOC full correction device, characterized in that: include: Full charge monitoring module, used to monitor the full charge of all single cells in the battery; A voltage difference calculation module is used to, if it is detected that any single cell in the battery is in a full state, subtract the voltage value of the single cell in an incomplete state from the full cut-off voltage to obtain the voltage difference corresponding to each single cell in an incomplete state; A full charge correction module is used to correct the SOC value of each uncharged single cell to the full scale value if the voltage difference corresponding to the single cell is less than the voltage sensor acquisition error; The battery SOC full correction device also includes: The SOC maintaining module is used for maintaining the SOC value of each single cell in an uncharged state unchanged if the voltage difference corresponding to the single cell is greater than the voltage sensor acquisition error.

5. The battery SOC full charge correction device according to claim 4, characterized in that: The full monitoring module specifically includes: Obtaining the voltage value of each single cell in the battery; For each single cell, if the voltage value of the single cell reaches the full charge cut-off voltage, it is determined that the single cell is in a full charge state; otherwise, it is determined that the single cell is in an unfull charge state.

6. The battery SOC full charge correction device according to claim 4, characterized in that: The full monitoring module specifically includes: Obtaining the SOC value of each single cell in the battery; For each single cell, if the SOC value of the single cell is equal to the full-scale value, it is determined that the single cell is in a fully charged state; otherwise, it is determined that the single cell is in an undercharged state.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the processor implements the steps of the battery SOC full charge correction method as described in any one of claims 1 to 3.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the full charge correction method of the battery SOC as described in any one of claims 1 to 3 are implemented.

9. A car, characterized in that: Comprising the electronic device as claimed in claim 7.

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