Battery state of charge compensation calibration method, device, equipment and medium

Abstract

The present invention discloses a battery state of charge compensation calibration method, device, equipment and medium, which judges whether a vehicle is in a high-voltage static state or a power-off static state, and performs compensation calibration on the battery state of charge according to the current state of the vehicle. The present invention considers the two situations of the battery being in a high-voltage static state and the power-off static state respectively, and performs different calibrations on the calculation of the battery state of charge, thereby improving the calculation accuracy of the battery state of charge.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery management, and in particular relates to a battery state of charge compensation calibration method, device, equipment and medium. Background Art

[0002] The battery state of charge, also known as the remaining capacity, represents the ratio of the remaining dischargeable capacity of the battery after it has been used for a period of time or has been left unused for a long time to the capacity of its fully charged state, usually expressed as a percentage. It is generally expressed in one byte, that is, two hexadecimal digits (the value range is 0 to 100), meaning that the remaining capacity is 0% to 100%. When SOC = 0, it means that the battery is fully discharged, and when SOC = 100, it means that the battery is fully charged.

[0003] The ampere-hour integration is a common method for calculating the battery SOC (battery state of charge). As the battery usage time increases, the error of the ampere-hour integration will become larger and larger, resulting in an increasing cumulative error in the SOC (battery state of charge) estimation, affecting the accuracy of the battery SOC (battery state of charge) estimation. When electric vehicles are stationary, there is a zero drift phenomenon when sampling current. The battery will also self-discharge when it is stationary for a long time. As the zero drift and self-discharge time increase, the calculation error of the battery SOC (battery state of charge) will continue to accumulate under uncalibrated conditions, resulting in an increasing deviation in the estimation of the battery SOC (battery state of charge). Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a battery state of charge compensation calibration method, device, equipment and medium, respectively considering the two situations of the battery in a high-voltage static state and a low-power static state, and calibrating the calculation of the battery state of charge in different ways to improve the calculation accuracy of the battery state of charge.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A battery state of charge compensation calibration method, wherein the battery is used in an energy storage system including a battery management system, and a calibration request is initiated when the energy storage system is started, the method comprising:

[0007] Determine whether the vehicle is in a high-voltage static state or a power-off static state, and perform compensation calibration on the battery state of charge according to the current state of the vehicle;

[0008] If the vehicle is in a high pressure static state, the compensation calibration includes:

[0009] Adding a compensation current to the bus current used by the battery management system to calculate the battery state of charge, and using the sum of the bus current and the compensation current as the total current value to calculate the battery state of charge;

[0010] If the vehicle is in a powered-off and stationary state, the compensation calibration includes:

[0011] Determine whether the battery state of charge has been calibrated, if so, reset the rest time to zero, if not, determine whether the rest time reaches a threshold;

[0012] If the accumulated time of the vehicle being in the power-off static state does not exceed the threshold, the power-off static time is reset to zero; if the power-off static time exceeds the threshold, the battery self-discharge loss is calculated based on the power-off static time;

[0013] The battery state of charge is calibrated based on the amount of self-discharge loss.

[0014] Furthermore, the calculation method of the compensation current specifically includes:

[0015] Statistics of the daily discharge of the vehicle in a high-voltage static state and the power consumption estimated by the battery management system;

[0016] The battery state of charge error value calculated by the battery management system is calculated according to the daily discharge amount and the power consumption amount, and the battery state of charge error value is converted into a corresponding compensation current value.

[0017] Furthermore, the determining whether the vehicle enters a high-pressure static state specifically includes:

[0018] Whether the vehicle enters the high-voltage static state is determined based on the bus current size and duration of the vehicle.

[0019] Furthermore, the calculation of the battery self-discharge loss according to the power-off standby time specifically includes:

[0020] Get the standard daily self-discharge model of the battery;

[0021] The battery self-discharge loss is calculated based on the standard daily self-discharge model, the current self-discharge days and the current temperature environment through linear interpolation.

[0022] Furthermore, the method for establishing the standard daily self-discharge model includes:

[0023] Obtain the discharge capacity of the battery at different temperatures and different rest times;

[0024] Through analysis, a standard daily self-discharge model of the battery at different temperatures and different standing times is established.

[0025] Furthermore, the method for obtaining the discharge capacity of the battery at different temperatures and different standing times includes:

[0026] The battery is subjected to a static test, and the discharge capacity of the battery at different temperatures and different static times is calculated.

[0027] Furthermore, the calibrating the battery state of charge according to the self-discharge loss specifically includes:

[0028] It is determined whether the self-discharge loss is greater than or equal to the current battery power. If so, the battery state of charge is calibrated to 0; if not, the battery state of charge is calibrated to the current battery power minus the self-discharge loss.

[0029] On the other hand, the present invention also provides a battery state of charge compensation calibration device, the device comprising:

[0030] A state judgment module, used to judge whether the vehicle is in a high-voltage static state or a power-off static state;

[0031] The high-voltage static compensation module is used to perform compensation calibration on the battery state of charge when the vehicle is in a high-voltage static state. The compensation calibration includes:

[0032] Adding a compensation current to the bus current used by the battery management system to calculate the battery state of charge, and using the sum of the bus current and the compensation current as the total current value to calculate the battery state of charge;

[0033] The power-off static compensation module is used to perform compensation calibration on the battery state of charge when the vehicle is in a power-off static state. The compensation calibration includes:

[0034] Determine whether the battery state of charge has been calibrated, if so, reset the rest time to zero, if not, determine whether the rest time reaches a threshold;

[0035] If the accumulated time of the vehicle being in the power-off static state does not exceed the threshold, the power-off static time is reset to zero; if the power-off static time exceeds the threshold, the battery self-discharge loss is calculated based on the power-off static time;

[0036] The battery state of charge is calibrated based on the amount of self-discharge loss.

[0037] Optionally, the high-voltage static compensation module calculates the compensation current in a manner that specifically includes:

[0038] Statistics of the daily discharge of the vehicle in a high-voltage static state and the power consumption estimated by the battery management system;

[0039] The battery state of charge error value calculated by the battery management system is calculated according to the daily discharge amount and the power consumption amount, and the battery state of charge error value is converted into a corresponding compensation current value.

[0040] Optionally, the high-pressure static compensation module determines whether the vehicle enters a high-pressure static state specifically including:

[0041] Whether the vehicle enters the high-voltage static state is determined based on the bus current size and duration of the vehicle.

[0042] Optionally, the power-off static compensation module calculates the battery self-discharge loss according to the power-off static time, specifically including:

[0043] Get the standard daily self-discharge model of the battery;

[0044] The battery self-discharge loss is calculated based on the standard daily self-discharge model, the current self-discharge days and the current temperature environment through linear interpolation.

[0045] Optionally, the method for the power-off static compensation module to establish a standard daily self-discharge model includes:

[0046] Obtain the discharge capacity of the battery at different temperatures and different rest times;

[0047] Through analysis, a standard daily self-discharge model of the battery at different temperatures and different standing times is established.

[0048] Optionally, the method for the power-off static compensation module to obtain the discharge amount of the battery at different temperatures and different static times includes:

[0049] The battery is subjected to a static test, and the discharge capacity of the battery at different temperatures and different static times is calculated.

[0050] Optionally, the power-off static compensation module calibrates the battery state of charge according to the self-discharge loss, specifically including:

[0051] It is determined whether the self-discharge loss is greater than or equal to the current battery power. If so, the battery state of charge is calibrated to 0; if not, the battery state of charge is calibrated to the current battery power minus the self-discharge loss.

[0052] On the other hand, the present invention further provides a computer device, comprising a processor and a memory, wherein the memory stores a computer program, and the computer program is loaded and executed by the processor to implement any one of the above-mentioned battery state of charge compensation calibration methods.

[0053] On the other hand, the present invention further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program is loaded and executed by a processor to implement any of the above-mentioned battery state of charge compensation calibration methods.

[0054] The beneficial effects of the present invention are:

[0055] (1) The present invention considers two situations, namely, the battery being in a high-voltage static state and the battery being in a low-power static state, and calibrates the calculation of the battery state of charge in different ways, thereby improving the calculation accuracy of the battery state of charge and reducing the collection error and zero drift of the current sensor when the battery management system calculates the battery state of charge.

[0056] (2) The present invention calculates the battery state of charge in a high-voltage static state by adding a compensation current to the bus current, thereby improving the calculation accuracy of the current battery state of charge.

[0057] (3) The present invention calibrates the state of charge of a battery in a power-off static state by using the self-discharge loss, thereby improving the calculation accuracy of the current battery state of charge. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a schematic diagram of the flow chart of the battery state of charge compensation calibration method provided by an embodiment of the present invention;

[0059] Figure 2 It is a flow chart of a compensation calibration method for a battery in a powered-off static state provided by an embodiment of the present invention;

[0060] Figure 3 It is a structural block diagram of a battery state of charge compensation calibration device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0061] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0062] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0063] When electric vehicles are stationary, there is a zero drift phenomenon when sampling current. The battery will also self-discharge when it is stationary for a long time. As the zero drift and self-discharge time increase, the calculation error of the battery SOC (battery state of charge) will continue to accumulate under uncalibrated conditions, resulting in an increasingly large estimation deviation of the battery SOC (battery state of charge).

[0064] In order to solve the above technical problems, various embodiments of the battery state of charge compensation calibration method, device, equipment and medium of the present invention are proposed.

[0065] Example 1

[0066] This embodiment takes an electric car as an example. When the vehicle is in a high-voltage static working condition, the current consumption of the vehicle is relatively small, and it is greatly affected by the acquisition error and zero drift of the current sensor. If it is in this working condition for a long time, the SOC (battery state of charge) calculation error becomes larger and larger. Therefore, under this working condition, it is necessary to perform compensation calibration estimation on the SOC estimation.

[0067] Reference Figure 1 ,like Figure 1 FIG. 1 is a flow chart of a battery state of charge compensation calibration method provided in this embodiment, and the method specifically comprises the following steps:

[0068] Step S100: determining whether the vehicle is in a high-voltage static state or a power-off static state, and performing compensation calibration on the battery state of charge according to the current state of the vehicle.

[0069] Among them, the BMS (battery management system) determines whether the vehicle enters the high-voltage static state according to the size of the vehicle bus current i and the maintenance time of i. The specific judgment steps are common knowledge of technicians and will not be repeated again.

[0070] If the vehicle is in a high-pressure static state, the specific steps of compensation calibration in this state include:

[0071] Step S201: adding a compensation current to the bus current used by the battery management system to calculate the battery state of charge, and using the sum of the bus current and the compensation current as the total current value to calculate the battery state of charge.

[0072] Specifically, the calculation method of the compensation current includes:

[0073] First, we conduct a real vehicle test and calculate the daily discharge Q1 of the vehicle under high-voltage static state and the power consumption Q2 estimated by the BMS;

[0074] Then, the SOC error value calculated by the BMS is calculated based on the values ​​of Q1 and Q2, and this value is converted into the corresponding compensation current value I0;

[0075] If it is in a high-voltage static state, the compensation current I0 is added to the bus current i of the BMS to estimate the battery SOC. At this time, I0+i is used as the current value for SOC estimation, and the power consumption is calculated as ΔSOC=∫(i+I0)dt;

[0076] Finally, the ΔSOC calculated above is subtracted from 100 to obtain the final SOC calibration result.

[0077] If the vehicle is in a powered-off and stationary state, refer to Figure 2 ,like Figure 2 FIG. 1 is a flow chart of a compensation calibration method provided by the present embodiment when the battery is in a powered-off static state. The specific steps of the compensation calibration in this state include:

[0078] Step S211: determine whether the battery state of charge has been calibrated. If so, reset the rest time to zero. If not, determine whether the rest time reaches a threshold.

[0079] It should be noted that whether the battery state of charge is calibrated includes but is not limited to the battery state of charge compensation calibration method provided in this embodiment. If the battery state of charge has been calibrated by other methods, the rest time is also reset to zero.

[0080] Step S212: If the accumulated time of the vehicle being in the power-off static state does not exceed the threshold value D0, the power-off static time is reset to zero; if the power-off static time exceeds the threshold value D0, the battery self-discharge loss is calculated according to the power-off static time.

[0081] It should be noted that the threshold D0 set in this step is generally a shorter time such as 0.5 days or 1 day. Its purpose is to determine whether the stability of the current electric vehicle has reached the conditions for compensation calibration, and to exclude the situation where the vehicle has been started in the middle, which would make accurate calibration impossible.

[0082] In addition, the threshold D0 cannot be set too large. If it is set too large, the power-off idle time cannot be correctly accumulated, resulting in inaccurate calibration results.

[0083] Specifically, calculating the battery self-discharge loss according to the power-off standby time specifically includes:

[0084] Obtain the standard daily self-discharge model of the battery. The standard daily self-discharge model can be directly imported from the outside or established by yourself;

[0085] Among them, the method for establishing the standard daily self-discharge model includes:

[0086] Obtain the discharge capacity of the battery at different temperatures and different rest times;

[0087] Through analysis, a standard daily self-discharge model of the battery at different temperatures and different standing times is established.

[0088] As an implementation method, a method for obtaining the discharge capacity of a battery at different temperatures and different standing times includes:

[0089] The battery is subjected to a static test, and the discharge capacity of the battery at different temperatures and different static times is calculated.

[0090] The battery self-discharge loss is calculated based on the standard daily self-discharge model, the current self-discharge days and the current temperature environment through linear interpolation.

[0091] Step S213: calibrating the battery state of charge according to the self-discharge loss.

[0092] As an implementation method, a static test is performed on the Pack (battery pack), and the discharge amount of the Pack at different temperature points (-10℃, 0℃, 10℃, 20℃, 30℃, 40℃) and different time periods (20 days, 40 days, 60 days, 90 days) are counted respectively. Based on these statistical data, the daily self-discharge amount Q of each interval under the corresponding number of days and gear conditions is calculated. i1 , Q i2 , Q i3 , Q i4 , and obtain the standard daily self-discharge model. In addition, in order to improve the accuracy of the standard daily self-discharge model, more different levels of temperature and standing time can be divided. The above method of conducting experiments and statistics based on different battery cell types to obtain the daily self-discharge capacity of each interval under the corresponding days and levels is common knowledge for technicians and will not be repeated here.

[0093] The clock system of the battery management system calculates the storage time t from the last SOC calibration of the vehicle to the present. When the storage time exceeds a certain number of days D0 and the BMS has not calibrated the SOC at this time, the battery self-discharge loss is calculated by linear interpolation based on the standard daily self-discharge model, the current self-discharge days and the current temperature environment.

[0094] Among them, the current temperature environment linear interpolation is a correlation coefficient of the current ambient temperature in the standard daily self-discharge model for calculating the self-discharge power loss. The self-discharge power loss and temperature are positively correlated with the standing time. Therefore, the current temperature environment linear interpolation can be obtained according to the current ambient temperature and the standard daily self-discharge model. Then, the daily self-discharge Q′ at different standing times under the current ambient temperature can be calculated according to the current temperature environment linear interpolation. i1 , Q′ i2 , Q′ i3 , Q′ i4 .

[0095] The self-discharge power loss is calculated as follows:

[0096]

[0097]

[0098]

[0099]

[0100] When the self-discharge loss is greater than or equal to the current battery power, the battery power is directly calibrated to 0. If the self-discharge loss is less than the current battery power, the current battery power minus the self-discharge loss is used to obtain the final SOC calibration result. At the same time, once the SOC is calibrated, the static time is reset to zero.

[0101] The battery state of charge compensation calibration method provided in this embodiment considers two situations, namely, the battery in a high-voltage static state and a low-power static state, and calibrates the calculation of the battery state of charge in different ways, thereby improving the calculation accuracy of the battery state of charge and reducing the collection error and zero drift of the current sensor when the battery management system calculates the battery state of charge.

[0102] Example 2

[0103] Reference Figure 3 ,like Figure 3 FIG. 1 is a structural block diagram of a battery state of charge compensation calibration device provided in this embodiment, and the device specifically includes:

[0104] A state determination module 10, for determining whether the vehicle is in a high-voltage static state or a power-off static state;

[0105] The high-voltage static compensation module 20 is used to perform compensation calibration on the battery state of charge when the vehicle is in a high-voltage static state. The compensation calibration includes:

[0106] The compensation current is added to the bus current used by the battery management system to calculate the battery state of charge, and the sum of the bus current and the compensation current is used as the total current value to calculate the battery state of charge;

[0107] The power-off static compensation module 30 is used to perform compensation calibration on the battery state of charge when the vehicle is in a power-off static state. The compensation calibration includes:

[0108] Determine whether the battery state of charge has been calibrated, if so, reset the rest time to zero, if not, determine whether the rest time reaches a threshold;

[0109] If the accumulated time of the vehicle being in the power-off static state does not exceed the threshold, the power-off static time is reset to zero; if the power-off static time exceeds the threshold, the battery self-discharge loss is calculated based on the power-off static time;

[0110] The battery state of charge is calibrated based on the amount of self-discharge loss.

[0111] As an implementation manner, the high voltage static compensation module 20 calculates the compensation current in the following manner:

[0112] Statistics of the daily discharge of the vehicle in a high-voltage static state and the power consumption estimated by the battery management system;

[0113] The battery state of charge error value calculated by the battery management system is calculated according to the daily discharge amount and the power consumption, and the battery state of charge error value is converted into a corresponding compensation current value.

[0114] As an implementation manner, the high-pressure static compensation module 20 determines whether the vehicle enters the high-pressure static state specifically including:

[0115] Whether the vehicle enters the high-voltage static state is determined based on the bus current size and duration of the vehicle.

[0116] As an implementation manner, the power-off static compensation module 30 calculates the battery self-discharge loss according to the power-off static time, specifically including:

[0117] Get the standard daily self-discharge model of the battery;

[0118] The battery self-discharge loss is calculated based on the standard daily self-discharge model, the current self-discharge days and the current temperature environment through linear interpolation.

[0119] As an implementation manner, the method for the power-off static compensation module 30 to establish a standard daily self-discharge model includes:

[0120] Obtain the discharge capacity of the battery at different temperatures and different rest times;

[0121] Through analysis, a standard daily self-discharge model of the battery at different temperatures and different standing times is established.

[0122] As an implementation manner, the method for the power-off static compensation module 30 to obtain the discharge amount of the battery at different temperatures and different static times includes:

[0123] The battery is subjected to a static test, and the discharge capacity of the battery at different temperatures and different static times is calculated.

[0124] As an implementation manner, the power-off static compensation module 30 calibrates the battery state of charge according to the self-discharge loss, specifically including:

[0125] It is determined whether the self-discharge loss is greater than or equal to the current battery power. If so, the battery state of charge is calibrated to 0; if not, the battery state of charge is calibrated to the current battery power minus the self-discharge loss.

[0126] The battery state of charge compensation calibration device provided in this embodiment considers two situations, namely, the battery in a high-voltage static state and the battery in a low-power static state, and calibrates the calculation of the battery state of charge in different ways, thereby improving the calculation accuracy of the battery state of charge and reducing the collection error and zero drift of the current sensor when the battery management system calculates the battery state of charge.

[0127] Example 3

[0128] This preferred embodiment provides a computer device, which can implement the steps in any embodiment of the battery state of charge compensation calibration method provided in the embodiments of the present application. Therefore, the beneficial effects of the battery state of charge compensation calibration method provided in the embodiments of the present application can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0129] Example 4

[0130] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments can be completed by instructions, or by controlling related hardware through instructions, and the instructions can be stored in a computer-readable storage medium and loaded and executed by a processor. To this end, an embodiment of the present invention provides a storage medium, which stores a plurality of instructions, and the instructions can be loaded by a processor to execute the steps of any embodiment of the battery state of charge compensation calibration method provided in the embodiment of the present invention.

[0131] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0132] Since the instructions stored in the storage medium can execute the steps in any battery state of charge compensation calibration method embodiment provided in the embodiments of the present invention, the beneficial effects that can be achieved by any battery state of charge compensation calibration method provided in the embodiments of the present invention can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0133] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery state of charge compensation calibration method, wherein the battery is used in an energy storage system including a battery management system, and a calibration request is initiated when the energy storage system is started, characterized in that: The method comprises: Determine whether the vehicle is in a high-voltage static state or a power-off static state, and perform compensation calibration on the battery state of charge according to the current state of the vehicle; If the vehicle is in a high pressure static state, the compensation calibration includes: Adding a compensation current to the bus current used by the battery management system to calculate the battery state of charge, and using the sum of the bus current and the compensation current as the total current value to calculate the battery state of charge; If the vehicle is in a powered-off and stationary state, the compensation calibration includes: Determine whether the battery state of charge has been calibrated, if so, reset the rest time to zero, if not, determine whether the rest time reaches a threshold; If the accumulated time of the vehicle being in the power-off static state does not exceed the threshold, the power-off static time is reset to zero; if the power-off static time exceeds the threshold, the battery self-discharge loss is calculated based on the power-off static time; The battery state of charge is calibrated based on the amount of self-discharge loss.

2. The battery state of charge compensation calibration method according to claim 1, characterized in that: The calculation method of the compensation current specifically includes: Statistics of the daily discharge of the vehicle in a high-voltage static state and the power consumption estimated by the battery management system; The battery state of charge error value calculated by the battery management system is calculated according to the daily discharge amount and the power consumption amount, and the battery state of charge error value is converted into a corresponding compensation current value.

3. The battery state of charge compensation calibration method according to claim 1, characterized in that: The determining whether the vehicle enters the high-pressure static state specifically includes: Whether the vehicle enters the high-voltage static state is determined based on the bus current size and duration of the vehicle.

4. The battery state of charge compensation calibration method according to claim 1, characterized in that: The calculation of the battery self-discharge loss according to the power-off standstill time specifically includes: Get the standard daily self-discharge model of the battery; The battery self-discharge loss is calculated based on the standard daily self-discharge model, the current self-discharge days and the current temperature environment through linear interpolation.

5. The battery state of charge compensation calibration method according to claim 4, characterized in that: The method for establishing the standard daily self-discharge model includes: Obtain the discharge capacity of the battery at different temperatures and different rest times; Through analysis, a standard daily self-discharge model of the battery under different temperatures and different standing times was established.

6. The battery state of charge compensation calibration method according to claim 5, characterized in that: The method for obtaining the discharge capacity of a battery at different temperatures and different standing times includes: The battery is subjected to a static test, and the discharge capacity of the battery at different temperatures and different static times is calculated.

7. The battery state of charge compensation calibration method according to claim 1, characterized in that: The calibrating the battery state of charge according to the self-discharge loss specifically includes: It is determined whether the self-discharge loss is greater than or equal to the current battery power. If so, the battery state of charge is calibrated to 0; if not, the battery state of charge is calibrated to the current battery power minus the self-discharge loss.

8. A battery state of charge compensation calibration device, characterized in that: The device comprises: A state judgment module, used to judge whether the vehicle is in a high-voltage static state or a power-off static state; The high-voltage static compensation module is used to perform compensation calibration on the battery state of charge when the vehicle is in a high-voltage static state. The compensation calibration includes: Adding a compensation current to the bus current used by the battery management system to calculate the battery state of charge, and using the sum of the bus current and the compensation current as the total current value to calculate the battery state of charge; The power-off static compensation module is used to perform compensation calibration on the battery state of charge when the vehicle is in a power-off static state. The compensation calibration includes: Determine whether the battery state of charge has been calibrated, if so, reset the rest time to zero, if not, determine whether the rest time reaches a threshold; If the accumulated time of the vehicle being in the power-off static state does not exceed the threshold, the power-off static time is reset to zero; if the power-off static time exceeds the threshold, the battery self-discharge loss is calculated based on the power-off static time; The battery state of charge is calibrated based on the amount of self-discharge loss.

9. A computer device, characterized in that: The computer device comprises a processor and a memory, wherein a computer program is stored in the memory, and the computer program is loaded and executed by the processor to implement the battery state of charge compensation calibration method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, which is loaded and executed by a processor to implement the battery state of charge compensation calibration method according to any one of claims 1 to 7.

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