Power battery charging control method, device and equipment, storage medium and vehicle

Abstract

The application relates to a power battery charging control method, device, equipment, storage medium and vehicle. The method comprises the following steps: obtaining a target SOC difference value, the target SOC difference value being used for indicating the difference between the SOC value of a battery cell with the maximum SOC value and the SOC value of a battery cell with the minimum SOC value in a full power state; determining a charging cut-off SOC value of a target power battery based on the relationship between a redundant charging SOC value and a battery cell SOC threshold value, the redundant charging SOC value being the sum of the target SOC difference value and a basic charging SOC value, the basic charging SOC value being the sum of a target SOC variation and a discharging cut-off SOC value; the charging cut-off SOC value is greater than the basic charging SOC value and less than or equal to the smaller value in the battery cell SOC threshold value and the redundant charging SOC value; and in the case that the SOC value of a first battery cell in the target power battery is equal to the charging cut-off SOC value, the charging of the target power battery is stopped.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a power battery charging control method, device, electronic device, storage medium and vehicle. Background Art

[0002] In the power batteries equipped with new energy vehicles, the remaining power (State of Charge (SOC)) is mainly estimated by the cumulative ampere-hour method, that is, the current is integrated in the time dimension and divided by the rated capacity to obtain the SOC change at this moment - the ΔSOC value, and then the SOC value at this moment is subtracted from the ΔSOC value at this moment from the SOC value at the previous moment to obtain the SOC value at this moment.

[0003] Power batteries typically consist of several cells, which can present cell consistency issues. This is especially true when the SOC values ​​of different cells vary when the power battery is fully charged. Furthermore, charging is typically stopped when the SOC value of the cell with the highest SOC value reaches the cutoff condition. Consequently, when the power battery is fully charged, the actual charge capacity may be lower than the target charge capacity due to differences in SOC values ​​between cells. Summary of the Invention

[0004] The present application provides a power battery charging control method, device, electronic device, storage medium and vehicle, which can increase the actual discharge amount of the power battery from a fully charged state to a discharge cut-off state, and improve the vehicle's cruising range in the fully charged state.

[0005] In a first aspect, the present application provides a power battery charging control method, comprising: obtaining a target SOC difference value, the target SOC difference value being used to indicate the difference between the SOC value of a first battery cell and the SOC value of a second battery cell of a power battery in a fully charged state, the first battery cell being the battery cell with the largest SOC value in the power battery in a fully charged state, and the second battery cell being the battery cell with the smallest SOC value in the power battery in a fully charged state; determining a target charging cutoff SOC value of the power battery based on a relationship between a redundant charging SOC value and a battery cell SOC threshold, wherein the redundant charging SOC value is the sum of the target SOC difference value and a basic charging SOC value, and the basic charging SOC value is the sum of the target SOC difference value and the basic charging SOC value. The OC value is the sum of the target SOC change and the discharge cut-off SOC value. The target SOC change is the SOC change corresponding to the target discharge amount of the target power battery from the fully charged state to the discharge cut-off state. The cell SOC threshold is the maximum SOC value allowed for the cell in the target power battery while ensuring the charging safety of the target power battery. The charge cut-off SOC value is greater than the basic charge SOC value and is less than or equal to the smaller value of the cell SOC threshold and the redundant charge SOC value. When the SOC value of the first cell in the target power battery is equal to the charge cut-off SOC value, charging of the target power battery is stopped.

[0006] In some embodiments of the present application, when the SOC value of the first battery cell in the target power battery is equal to the charge cut-off SOC value, before stopping charging the target power battery, the method also includes: judging whether the SOC value of the first battery cell in the target power battery is equal to the charge cut-off SOC value, and whether the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value; when the SOC value of the first battery cell in the target power battery is equal to the charge cut-off SOC value, stopping charging the target power battery, including: when the SOC value of the first battery cell in the target power battery is equal to the charge cut-off SOC value, and the SOC value of the second battery cell in the target power battery is less than or equal to the basic charging SOC value, stopping charging the target power battery.

[0007] In some embodiments of the present application, after determining whether the SOC value of the first battery cell in the target power battery is equal to the charging cutoff SOC value, and whether the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value, the method further includes: stopping charging the target power battery when the SOC value of the first battery cell in the target power battery is less than the charging cutoff SOC value, and the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value.

[0008] In some embodiments of the present application, after determining the charging cutoff SOC value of the target power battery based on the relationship between the redundant charging SOC value and the battery cell SOC threshold, the method also includes: determining the charging cutoff voltage value according to multiple full-charge voltage values ​​corresponding to the charging cutoff SOC value, the charging cutoff voltage value being greater than or equal to the minimum value of the multiple full-charge voltage values ​​and less than or equal to the maximum value of the multiple full-charge voltage values, and the multiple full-charge voltage values ​​being voltage values ​​when the SOC values ​​of different battery cells are equal to the charging cutoff SOC value; when the SOC value of the first battery cell in the target power battery is equal to the charging cutoff SOC value, stopping charging the target power battery, including: when the voltage value of the first battery cell in the target power battery is equal to the charging cutoff voltage value, stopping charging the target power battery.

[0009] In some embodiments of the present application, the method further includes: determining a full-charge cutoff voltage value based on multiple target full-charge voltage values ​​corresponding to the basic charging SOC value, the full-charge cutoff voltage value being greater than or equal to the minimum value of the multiple target full-charge voltage values ​​and less than or equal to the maximum value of the multiple target full-charge voltage values, and the multiple target full-charge voltage values ​​being voltage values ​​when the SOC values ​​of different battery cells are equal to the basic charging SOC value; when the voltage value of the first battery cell in the target power battery is equal to the charge cutoff voltage value, before stopping charging the target power battery, the method further includes: determining whether the voltage value of the first battery cell in the target power battery is equal to the charge cutoff voltage value, and whether the voltage value of the second battery cell in the target power battery is equal to the full-charge cutoff voltage value; when the voltage value of the first battery cell in the target power battery is equal to the charge cutoff voltage value, stopping charging the target power battery, including: stopping charging the target power battery when the voltage value of the first battery cell in the target power battery is equal to the charge cutoff voltage value, and the voltage value of the second battery cell in the target power battery is less than or equal to the full-charge cutoff voltage value.

[0010] In some embodiments of the present application, after determining whether the voltage value of the first battery cell in the target power battery is equal to the charge cut-off voltage value, and whether the voltage value of the second battery cell in the target power battery is equal to the full-charge cut-off voltage value, the method further includes: stopping charging the target power battery when the voltage value of the first battery cell in the target power battery is less than the charge cut-off voltage value, and the voltage value of the second battery cell in the target power battery is equal to the full-charge cut-off voltage value.

[0011] In some embodiments of the present application, the method further includes: when the SOC value corresponding to the real-time power level of the target power battery is less than or equal to the target display SOC value, determining the SOC value corresponding to the real-time power level as the display SOC value; when the SOC value corresponding to the real-time power level is greater than the target display SOC value, determining the display SOC value based on the voltage value of the first battery cell in the target power battery or the voltage value of the second battery cell in the target power battery, so that when charging of the target power battery is stopped, the display SOC value is the display SOC threshold, and the display SOC value is greater than the target display SOC value and less than or equal to the display SOC threshold.

[0012] In some embodiments of the present application, the displayed SOC value is determined based on the voltage value of the first battery cell in the target power battery or the voltage value of the second battery cell in the target power battery, including: when the first difference is greater than or equal to the second difference, the displayed SOC value is determined based on the voltage value of the first battery cell in the target power battery; when the first difference is less than the second difference, the displayed SOC value is determined based on the voltage value of the second battery cell in the target power battery; wherein the first difference is the difference between the voltage value of the first battery cell in the target power battery and the charging cut-off voltage value, and the second difference is the difference between the voltage value of the second battery cell in the target power battery and the full-charge cut-off voltage value.

[0013] In some embodiments of the present application, obtaining a target SOC difference value includes: obtaining multiple SOC difference values ​​corresponding to multiple power batteries, each SOC difference value being an SOC difference value of a different power battery; determining a target SOC difference value based on the multiple SOC difference values, the target SOC difference value being greater than or equal to a minimum value among the multiple SOC difference values, and less than or equal to a maximum value among the multiple SOC difference values.

[0014] In some embodiments of the present application, a target SOC difference value is determined based on multiple SOC difference values, including: counting the number of full-charge times of the power battery corresponding to each SOC difference value to obtain multiple full-charge times; determining the target SOC difference value based on the multiple SOC difference values ​​and the multiple full-charge times, the target SOC difference value is greater than or equal to the minimum value of the multiple first SOC difference values, and is less than or equal to the maximum value of the multiple first SOC difference values, and the multiple first SOC difference values ​​are each SOC difference value whose corresponding full-charge times are greater than or equal to the times threshold.

[0015] In some embodiments of the present application, obtaining multiple SOC difference values ​​includes: obtaining multiple mapping relationships, each mapping relationship is used to indicate the correspondence between the SOC and OCV of different battery cells of different power batteries; obtaining the voltage of each battery cell of each power battery in a fully charged state; determining the SOC value of each battery cell of each power battery in a fully charged state based on the voltage of each battery cell of each power battery in a fully charged state and the corresponding mapping relationship; calculating the SOC difference value of each power battery in a fully charged state according to the SOC value of each battery cell of each power battery in a fully charged state, to obtain multiple SOC difference values.

[0016] In a second aspect, the present application provides a power battery charging control device, comprising: an acquisition module, a determination module and a charging stop module; the acquisition module is used to acquire a target SOC difference value, the target SOC difference value is used to indicate the difference between the SOC value of the first battery cell and the SOC value of the second battery cell of the power battery in a fully charged state, the first battery cell is the battery cell with the largest SOC value in the power battery in a fully charged state, and the second battery cell is the battery cell with the smallest SOC value in the power battery in a fully charged state; the determination module is used to determine the charging cut-off SOC value of the target power battery based on the relationship between the redundant charging SOC value and the battery cell SOC threshold, wherein the redundant charging SOC value is the target SOC difference value and the basic charging SOC value. The basic charging SOC value is the sum of the target SOC change and the discharge cut-off SOC value, and the target SOC change is the SOC change corresponding to the target discharge amount of the target power battery from the fully charged state to the discharge cut-off state; the cell SOC threshold is the maximum SOC value allowed for the cell in the target power battery while ensuring the charging safety of the target power battery; the charge cut-off SOC value is greater than the basic charging SOC value and is less than or equal to the smaller value of the cell SOC threshold and the redundant charging SOC value; a charging stop module is used to stop charging the target power battery when the SOC value of the first cell in the target power battery is equal to the charge cut-off SOC value.

[0017] In some embodiments of the present application, the device also includes: a judgment module, used to judge whether the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value, and whether the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value before stopping charging the target power battery when the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value; and a charging stop module, specifically used to stop charging the target power battery when the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value, and the SOC value of the second battery cell in the target power battery is less than or equal to the basic charging SOC value.

[0018] In some embodiments of the present application, the charging stop module is further used to, after determining whether the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value and whether the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value, stop charging the target power battery if the SOC value of the first battery cell in the target power battery is less than the charging cut-off SOC value and the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value.

[0019] In some embodiments of the present application, the determination module is further used to determine the charging cutoff voltage value according to multiple full-charge voltage values ​​corresponding to the charging cutoff SOC value after determining the charging cutoff SOC value of the target power battery based on the relationship between the redundant charging SOC value and the battery cell SOC threshold, the charging cutoff voltage value being greater than or equal to the minimum value of the multiple full-charge voltage values ​​and less than or equal to the maximum value of the multiple full-charge voltage values, and the multiple full-charge voltage values ​​being voltage values ​​when the SOC values ​​of different battery cells are equal to the charging cutoff SOC value; the charging stop module is specifically used to stop charging the target power battery when the voltage value of the first battery cell in the target power battery is equal to the charging cutoff voltage value.

[0020] In some embodiments of the present application, the determination module is further used to determine a full-charge cutoff voltage value based on multiple target full-charge voltage values ​​corresponding to the basic charging SOC value, where the full-charge cutoff voltage value is greater than or equal to the minimum value of the multiple target full-charge voltage values ​​and less than or equal to the maximum value of the multiple target full-charge voltage values, and the multiple target full-charge voltage values ​​are voltage values ​​when the SOC values ​​of different battery cells are equal to the basic charging SOC value; the device also includes: a judgment module, used to judge whether the voltage value of the first battery cell in the target power battery is equal to the charging cutoff voltage value and whether the voltage value of the second battery cell in the target power battery is equal to the full-charge cutoff voltage value before stopping charging the target power battery when the voltage value of the first battery cell in the target power battery is equal to the charging cutoff voltage value; and a charging stop module, specifically used to stop charging the target power battery when the voltage value of the first battery cell in the target power battery is equal to the charging cutoff voltage value and the voltage value of the second battery cell in the target power battery is less than or equal to the full-charge cutoff voltage value.

[0021] In some embodiments of the present application, the charging stop module is further used to, after determining whether the voltage value of the first battery cell in the target power battery is equal to the charging cut-off voltage value and whether the voltage value of the second battery cell in the target power battery is equal to the full-charge cut-off voltage value, stop charging the target power battery if the voltage value of the first battery cell in the target power battery is less than the charging cut-off voltage value and the voltage value of the second battery cell in the target power battery is equal to the full-charge cut-off voltage value.

[0022] In some embodiments of the present application, the determination module is further used to determine the SOC value corresponding to the real-time power of the target power battery as the display SOC value when the SOC value corresponding to the real-time power of the target power battery is less than or equal to the target display SOC value; when the SOC value corresponding to the real-time power is greater than the target display SOC value, determine the display SOC value according to the voltage value of the first battery cell in the target power battery or the voltage value of the second battery cell in the target power battery, so that when charging of the target power battery is stopped, the display SOC value is the display SOC threshold, and the display SOC value is greater than the target display SOC value and less than or equal to the display SOC threshold.

[0023] In some embodiments of the present application, the determination module is specifically used to determine and display the SOC value based on the voltage value of the first battery cell in the target power battery when the first difference is greater than or equal to the second difference; and to determine and display the SOC value based on the voltage value of the second battery cell in the target power battery when the first difference is less than the second difference; wherein the first difference is the difference between the voltage value of the first battery cell in the target power battery and the charging cut-off voltage value, and the second difference is the difference between the voltage value of the second battery cell in the target power battery and the full-charge cut-off voltage value.

[0024] In some embodiments of the present application, the acquisition module is specifically used to obtain multiple SOC difference values ​​corresponding to multiple power batteries, each SOC difference value is the SOC difference value of a different power battery; based on the multiple SOC difference values, a target SOC difference value is determined, and the target SOC difference value is greater than or equal to the minimum value among the multiple SOC difference values, and less than or equal to the maximum value among the multiple SOC difference values.

[0025] In some embodiments of the present application, the acquisition module is specifically used to count the number of full-charge times of the power battery corresponding to each SOC difference value to obtain multiple full-charge times; determine the target SOC difference value based on the multiple SOC difference values ​​and the multiple full-charge times, the target SOC difference value is greater than or equal to the minimum value of the multiple first SOC difference values, and is less than or equal to the maximum value of the multiple first SOC difference values, and the multiple first SOC difference values ​​are the respective SOC difference values ​​whose corresponding full-charge times are greater than or equal to the times threshold.

[0026] In some embodiments of the present application, an acquisition module is specifically used to obtain multiple mapping relationships, each mapping relationship is used to indicate the correspondence between the SOC and OCV of different battery cells of different power batteries; obtain the voltage of each battery cell of each power battery in a fully charged state; based on the voltage of each battery cell of each power battery in a fully charged state and the corresponding mapping relationship, determine the SOC value of each battery cell of each power battery in a fully charged state; according to the SOC value of each battery cell of each power battery in a fully charged state, calculate the SOC difference value of each power battery in a fully charged state to obtain multiple SOC difference values.

[0027] In a third aspect, the present application provides an electronic device comprising: a processor, the processor being configured to execute a computer program stored in a memory, wherein when the computer program is executed by the processor, the steps of any one of the power battery charging control methods provided in the first aspect are implemented.

[0028] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the power battery charging control methods provided in the first aspect.

[0029] In a fifth aspect, an embodiment of the present application provides a vehicle, comprising: a power battery charging control device as described in the second aspect, or an electronic device as described in the third aspect, or a computer-readable storage medium as described in the fourth aspect.

[0030] In a sixth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a computer program or instructions. When the computer program product runs on a processor, the processor executes the computer program or instructions to implement the steps of the power battery charging control method as described in the first aspect.

[0031] In the seventh aspect, an embodiment of the present application provides a chip, which includes a processor, a memory and a communication interface, the communication interface is coupled to the processor, the memory is used to store programs or instructions that can be run on the processor, and the processor is used to execute the program or instructions to implement the steps of the power battery charging control method as described in the first aspect.

[0032] The technical solution provided by the embodiment of the present application has the following advantages over the prior art: In the embodiment of the present application, a target SOC difference value is obtained, and the target SOC difference value is used to indicate the difference between the SOC value of the first battery cell and the SOC value of the second battery cell of the power battery in a fully charged state, the first battery cell is the battery cell with the largest SOC value in the power battery in a fully charged state, and the second battery cell is the battery cell with the smallest SOC value in the power battery in a fully charged state; based on the relationship between the redundant charging SOC value and the battery cell SOC threshold, the target charging cut-off SOC value of the power battery is determined, wherein the redundant charging SOC value is the sum of the target SOC difference value and the basic charging SOC value, and the basic charging SOC value is the sum of the target SOC difference value and the basic charging SOC value. The basic charging SOC value is the sum of the target SOC change and the discharge cut-off SOC value. The target SOC change is the SOC change corresponding to the target discharge amount of the target power battery from a fully charged state to a discharge cut-off state. The cell SOC threshold is the maximum SOC value allowed for the cell in the target power battery while ensuring the charging safety of the target power battery. The charge cut-off SOC value is greater than the basic charging SOC value and is less than or equal to the smaller value of the cell SOC threshold and the redundant charging SOC value. When the SOC value of the first cell in the target power battery is equal to the charge cut-off SOC value, charging of the target power battery is stopped. In this way, during the charging process, by setting the charge cut-off SOC value of the battery cell (the first battery cell) with the largest SOC value in the target power battery in the charging state to be greater than the basic charge SOC value (the sum of the target SOC change and the discharge cut-off SOC value), the difference between the charge cut-off SOC value and the discharge cut-off SOC value is made greater than the target SOC change. In this way, compared with setting the difference between the charge cut-off SOC value and the discharge cut-off SOC value to be equal to the target SOC change, the SOC value of each battery cell in the target power battery in the fully charged state can be increased, thereby improving the actual charging amount of the power battery to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 A flow chart of a power battery charging control method provided in this application;

[0036] Figure 2 A flow chart of another power battery charging control method provided in this application;

[0037] Figure 3 A flow chart of another power battery charging control method provided in this application;

[0038] Figure 4 A flowchart of another power battery charging control method provided in this application;

[0039] Figure 5 A flowchart of another power battery charging control method provided in this application;

[0040] Figure 6 This is a schematic diagram of the structure of a power battery charging control device provided in this application;

[0041] Figure 7 A schematic diagram of the hardware structure of an electronic device provided in this application. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0044] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "first," "second," and the like generally distinguish objects of a class and do not limit the number of objects. For example, the first object may be one or more.

[0045] Because power batteries typically consist of multiple cells, there are cell consistency issues. This is especially true when the power battery is fully charged, as the SOC values ​​of different cells vary. The largest difference is between the cell with the highest SOC value and the cell with the lowest SOC value. In related art, during the power battery charging process, charging is stopped when the SOC value of the cell with the highest SOC value reaches the charging cutoff condition. At this time, the SOC value of the cell with the lowest SOC value cannot reach the charging cutoff condition, resulting in the actual charge capacity of the power battery being less than the target charge capacity when fully charged.

[0046] At the same time, after the battery is fully charged, the SOC value of each cell during the discharge process is calculated according to the cumulative ampere-hour method. The SOC value of each cell will gradually decrease. Among them, the cell with the smallest SOC value in the fully charged state will first reach the discharge cut-off SOC value during the discharge process. At this time, the power battery will stop discharging, which results in the actual discharge amount of the power battery being the difference between the SOC value of the cell with the smallest SOC value in the fully charged state and the discharge cut-off SOC value. However, when the SOC value of the cell with the smallest SOC value in the fully charged state is less than the sum of the target SOC change (i.e., the SOC change corresponding to the target discharge amount of the power battery from the fully charged state to the discharge cut-off state) and the discharge cut-off SOC value, the actual discharge amount of the power battery from the fully charged state to the discharge cut-off state will be less than the target discharge amount. In this way, the vehicle's cruising range in the fully charged state will not reach the designed target cruising range, affecting the user's driving experience.

[0047] The electronic device in the embodiment of the present application can be a vehicle-mounted terminal, or a mobile phone, notebook, computer, etc. that is connected to the vehicle for communication. The specific method can be determined based on actual conditions and is not limited here.

[0048] The technical solution of this application is explained in detail below through several specific embodiments.

[0049] Figure 1 A flow chart of a power battery charging control method provided in this application is shown as follows: Figure 1 As shown, the power battery charging control method may include the following steps 101 to 104:

[0050] 101. Obtain a target SOC difference value.

[0051] Among them, the target SOC difference value is used to indicate the difference between the SOC value of the first battery cell and the SOC value of the second battery cell of the power battery in a fully charged state. The first battery cell is the battery cell with the largest SOC value in the power battery in a fully charged state, and the second battery cell is the battery cell with the smallest SOC value in the power battery in a fully charged state.

[0052] In some embodiments of the present application, the above step 101 can be specifically implemented through the following steps 101a and 101b.

[0053] 101a. Obtain multiple SOC difference values ​​corresponding to multiple power batteries.

[0054] Each SOC difference value is an SOC difference value of different power batteries.

[0055] In some embodiments of the present application, each SOC difference value can be the SOC difference value of different power batteries at different temperatures, or the SOC difference value of different power batteries under different charging paths, or the SOC difference value of different power batteries under different temperatures and different charging paths, or the SOC difference value of different power batteries under other different conditions. The specific SOC difference value can be determined based on actual conditions and is not limited here.

[0056] 101b. Determine a target SOC difference value based on the multiple SOC difference values.

[0057] The target SOC difference value is greater than or equal to a minimum value among the multiple SOC difference values, and less than or equal to a maximum value among the multiple SOC difference values.

[0058] It is understandable that the target SOC difference value can be determined based on the difference between the SOC value of the first cell and the SOC value of the second cell of the multiple power batteries in a fully charged state (hereinafter referred to as the multiple SOC differences corresponding to the multiple power batteries). For example, it can be the average value of the multiple SOC differences, or the average value of the SOC difference interval with the highest proportion among the multiple SOC differences (the multiple SOC differences are divided into multiple SOC difference intervals of the same interval length according to their size, and the proportion of the number of SOC differences in each SOC difference interval to the total number of the multiple SOC differences is counted, and the average value of the SOC differences included in the SOC difference interval with the highest proportion among the multiple SOC difference intervals is determined as the target SOC difference value). It can also be the maximum value among the multiple SOC difference values, or the minimum value among the multiple SOC difference values. The target SOC difference value can also be determined based on the multiple SOC differences by other methods, which are not limited here.

[0059] In some embodiments of the present application, the multiple power batteries may be power batteries of the same or similar type as the target power battery (for example, power batteries with the same or similar charging cutoff conditions and the same or similar discharging cutoff conditions, not limited here).

[0060] In the embodiment of the present application, by obtaining multiple SOC difference values ​​and then determining a target SOC difference value that better meets the requirements based on the multiple SOC difference values, the charging amount of the target power battery can be increased while ensuring the safety of the target power battery, thereby increasing the discharge amount of the target power battery and improving the actual cruising range of the vehicle in a fully charged state.

[0061] Among them, each SOC difference value can be the difference between the measured SOC value of the first battery cell and the SOC value of the second battery cell of each power battery in a fully charged state, or it can be obtained by combining the battery balancing function principle, the battery cell consistency control target, the battery usage information and other predictive analysis; it can also be calculated based on the corresponding relationship between the SOC and OCV of the battery cells of the power battery, and the OCV value of each battery cell in a fully charged state (for example, the SOC value of each battery cell in a fully charged state is first calculated based on the corresponding relationship between the SOC and OCV of the battery cells and the OCV value of each battery cell in a fully charged state, and then the difference between the SOC value of the first battery cell and the SOC value of the second battery cell of each power battery in a fully charged state is calculated to obtain an SOC difference value). The specific SOC difference value can be determined according to actual conditions and is not limited here.

[0062] Among them, the battery usage information may include at least one of the following: the charging frequency of the power battery, the ambient temperature during vehicle driving, the battery temperature during vehicle driving, the vehicle's daily mileage, the vehicle locking time, etc.

[0063] In some embodiments of the present application, the above step 101a can be specifically implemented through the following steps 101a1 to 101a4.

[0064] 101a1. Acquire multiple mapping relationships.

[0065] Each mapping relationship is used to indicate the corresponding relationship between the SOC and the open circuit voltage (OCV) of different cells of different power batteries.

[0066] The corresponding relationship between SOC and OCV may be a functional relationship or a tabular relationship, which is not limited here.

[0067] In some embodiments of the present application, each mapping relationship may be a corresponding relationship between the SOC and OCV of different batteries at different temperatures and different rest times.

[0068] Each power battery is of the same or similar type as the target power battery and meets the temperature and rest time requirements.

[0069] 101a2. Obtain the voltage of each cell of each power battery in a fully charged state among the multiple power batteries.

[0070] 101a3. Determine the SOC value of each cell of each power battery in a fully charged state based on the voltage of each cell of each power battery in a fully charged state and the corresponding mapping relationship.

[0071] 101a4. Calculate the SOC difference value of each power battery in a fully charged state based on the SOC value of each cell in each power battery in a fully charged state to obtain a plurality of SOC difference values.

[0072] In the embodiment of the present application, since there is a certain error in detecting the SOC value of the power battery cell during the charging process and the measurement is inaccurate, the correspondence between the SOC and OCV of each cell of each power battery is first obtained, and then the voltage of each cell of each power battery in a fully charged state is determined. Then, based on the voltage of each cell of each power battery in a fully charged state and the corresponding correspondence between SOC and OCV, the SOC value of each cell of each power battery in a fully charged state is calculated, and then the SOC difference value corresponding to each power battery (the difference between the SOC value of the first cell and the SOC value of the second cell of each power battery) is calculated. In this way, a relatively accurate SOC difference value can be obtained.

[0073] In some embodiments of the present application, the above step 101b can be specifically implemented through the following steps 101b1 and 101b2.

[0074] 101b1. Count the number of full-charge times of the power battery corresponding to each SOC difference value to obtain a plurality of full-charge times.

[0075] 101b2. Determine a target SOC difference value according to the multiple SOC difference values ​​and the multiple full charge times.

[0076] Among them, the target SOC difference value is greater than or equal to the minimum value of multiple first SOC difference values, and less than or equal to the maximum value of multiple first SOC difference values. The multiple first SOC difference values ​​are each SOC difference value whose corresponding number of full-charge times is greater than or equal to the number threshold.

[0077] The number of full charge times refers to the number of times the power battery has been charged to a fully charged state during the historical charging process.

[0078] The number threshold can be determined according to actual conditions and is not limited here.

[0079] Among them, the target SOC difference value can be greater than or equal to a predetermined proportion (which can be determined here according to actual conditions) of the SOC difference values ​​among the multiple first SOC difference values. For example, the target SOC difference value can be the maximum value among the multiple first SOC difference values ​​(the predetermined proportion is 100%), or the minimum value among the multiple first SOC difference values ​​(the predetermined proportion is the ratio of 1 to the number of the multiple first SOC difference values), or the average value among the multiple first SOC difference values ​​(the predetermined proportion is 50%). The specific value can be determined according to actual conditions and is not limited here.

[0080] In the embodiment of the present application, since the principle of this solution is to increase the discharge capacity of the power battery by increasing the charge capacity of the power battery, the larger the target SOC difference value is, the greater the damage to the power battery that has been fully charged more times. Therefore, the target SOC difference value is determined in combination with the number of full charges of the power battery. Specifically, the target SOC difference value is determined in combination with multiple first SOC difference values ​​of the power batteries that have been fully charged more than or equal to the number threshold. This can better ensure the charging safety of each power battery and improve the life of the power battery.

[0081] 102. Determine a charging cutoff SOC value of the target power battery based on a relationship between the redundant charging SOC value and the battery cell SOC threshold.

[0082] Among them, the redundant charging SOC value is the sum of the target SOC difference value and the basic charging SOC value, the basic charging SOC value is the sum of the target SOC change and the discharge cut-off SOC value, the target SOC change is the SOC change corresponding to the target discharge amount of the target power battery from the fully charged state to the discharge cut-off state, the cell SOC threshold is the maximum SOC value allowed for the cell in the target power battery while ensuring the charging safety of the target power battery, and the charging cut-off SOC value is greater than the basic charging SOC value and is less than or equal to the smaller value of the cell SOC threshold and the redundant charging SOC value.

[0083] The target discharge capacity is the product of the rated capacity of the power battery and the preset discharge ratio. The preset discharge ratio can be determined based on actual conditions and is not limited here.

[0084] The discharge cut-off SOC value is the condition for controlling the power battery to stop discharging.

[0085] The base charge SOC value is the SOC value of the first cell of the target power battery in the background art when fully charged. In this case, if the SOC value of the second cell of the target power battery when fully charged is less than the base charge SOC value, then during discharge, when the SOC value of the second cell reaches the charge cutoff SOC value, the SOC change value of the second cell is less than the target SOC change, and therefore the actual discharge capacity of the target power battery is less than the target discharge capacity. Therefore, by setting the charge cutoff SOC value to be greater than the base charge SOC value, the SOC value of each cell in the target power battery when fully charged can be increased, thereby increasing the charge capacity of the target power battery and, in turn, the discharge capacity of the target battery.

[0086] Among them, the battery cell SOC threshold can be the maximum SOC value allowed for the battery cell, or the SOC safety value of the battery cell. It can be determined specifically according to actual conditions. For example, if the SOC value is measured in percentage, the maximum SOC value allowed for the battery cell corresponds to 100%, then the battery cell SOC threshold can be 100%, or it can be 98%, 99%, 97%, etc., which is not limited here.

[0087] For example, the cell SOC threshold is 98%, the target SOC change is 75%, and the discharge cut-off SOC value is 20%. If the target SOC difference value is 2%, the redundant charging SOC value is 97%, the cell SOC value is greater than the redundant charging SOC value, and the charging cut-off SOC value is 97%; if the target SOC difference value is 4%, the redundant charging SOC value is 99%, the cell SOC value is less than the redundant charging SOC value, and the charging cut-off SOC value is 98%.

[0088] In some embodiments of the present application, when the battery cell SOC threshold is less than the redundant charging SOC value, the charging cut-off SOC value is the battery cell SOC threshold or the product of the battery cell SOC threshold and a first ratio (the preset ratio is greater than the ratio of the basic charging SOC value to the battery cell SOC threshold, which is not limited here); when the battery cell SOC threshold is greater than the redundant charging SOC value, the charging cut-off SOC value is the redundant charging SOC value (that is, the sum of the target SOC difference value and the basic charging SOC value, and the basic charging SOC value is the sum of the target SOC change and the discharge cut-off SOC value) or the product of the first SOC threshold and a second ratio (the second ratio is greater than the ratio of the basic charging SOC value to the redundant charging SOC value, which is not limited here); the specific value can be determined according to actual conditions and is not limited here.

[0089] In the embodiment of the present application, the charge cut-off SOC value is greater than the basic charge SOC value (the sum of the target SOC change and the discharge cut-off SOC value), that is, it can ensure that the charge capacity of the first battery cell (SOC value in a fully charged state) is improved compared with the existing technology. At the same time, it can also ensure that the charge capacity of each battery cell in the target power battery (SOC value in a fully charged state) is improved, and then the charge capacity of the second battery cell (SOC value in a fully charged state) is improved, so that during the discharge process of the target power battery, when the SOC value of the second battery cell is equal to the discharge cut-off SOC value as the discharge stopping condition, the target power battery can discharge more electricity.

[0090] In the embodiment of the present application, the charging cut-off SOC value is less than or equal to the smaller value between the battery cell SOC threshold and the redundant charging SOC value. This ensures that the SOC value of the first battery cell in a fully charged state does not exceed the battery cell SOC threshold. In this way, the degree of charging damage to the first battery cell and other battery cells can be reduced, and the charging safety of the target power battery can be ensured and the life of the target power battery can be improved.

[0091] 103. When the SOC value of the first cell in the target power battery is equal to the charging cutoff SOC value, stop charging the target power battery.

[0092] In the embodiment of the present application, during the charging process, by setting the charge-cutoff SOC value of the cell (the first cell) with the largest SOC value in the target power battery under the charging state to be greater than the sum of the target SOC change and the discharge-cutoff SOC value, the difference between the charge-cutoff SOC value and the discharge-cutoff SOC value is greater than the target SOC change. In this way, compared with setting the difference between the charge-cutoff SOC value and the discharge-cutoff SOC value to be equal to the target SOC change, the SOC value of each cell in the target power battery under the fully charged state can be increased, thereby increasing the SOC value of the cell (the second cell) with the smallest SOC value in the target power battery under the fully charged state, thereby improving the actual charge capacity of the power battery to a certain extent. At the same time, during the discharge process of the target power battery, when the SOC value of the second cell is equal to the discharge-cutoff SOC value as the discharge stopping condition, the target power battery can discharge more electricity, which can improve the actual cruising range of the vehicle under the fully charged state, so that the actual cruising range can be closer to the designed target cruising range or equal to or greater than the designed target cruising range, thereby improving the user's driving experience.

[0093] In an embodiment of the present application, whether to stop charging the target power battery can be determined only based on whether the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value, that is, charging the target power battery is stopped when the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value, and charging the target power battery continues when the SOC value of the first battery cell in the target power battery is less than the charging cut-off SOC value.

[0094] In an embodiment of the present application, whether to stop charging the target power battery can also be determined in combination with whether the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value and other conditions. Other conditions may, for example, be whether the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value. For details, please refer to the following description.

[0095] In some embodiments of the present application, Figure 1 ,like Figure 2 As shown, before the above-mentioned step 103, the power battery charging control method provided by the embodiment of the present application may further include the following step 1041; the above-mentioned step 103 can be specifically implemented by the following step 103a, and the power battery charging control method provided by the embodiment of the present application may further include the following step 1042.

[0096] 1041. Determine whether the SOC value of the first cell in the target power battery is equal to the charge cutoff SOC value, and whether the SOC value of the second cell in the target power battery is equal to the basic charge SOC value.

[0097] 103a. When the SOC value of the first cell in the target power battery is equal to the charging cutoff SOC value, and the SOC value of the second cell in the target power battery is less than or equal to the basic charging SOC value, stop charging the target power battery.

[0098] 1042. When the SOC value of the first cell in the target power battery is less than the charging cutoff SOC value and the SOC value of the second cell in the target power battery is equal to the basic charging SOC value, stop charging the target power battery.

[0099] In the embodiment of the present application, when the SOC value of the first cell in the target power battery is equal to the charge cut-off SOC value, and the SOC value of the second cell in the target power battery is less than or equal to the basic charge SOC value, charging of the target power battery is stopped. Under the premise of ensuring the safety of the target power battery, the fully charged SOC value of the second cell in the target power battery can be increased as much as possible. In this way, when the SOC value of the second cell is equal to the discharge cut-off SOC value as the stop discharge condition, the target power battery can discharge more electricity; when the SOC value of the first cell in the target power battery is less than the charge cut-off SOC value, and the target power battery When the SOC value of the second battery cell in the battery is equal to the basic charging SOC value, charging of the target power battery is stopped. Since the SOC value of the second battery cell in the fully charged state is equal to the basic charging SOC value (the sum of the target SOC change and the discharge cut-off SOC value), when the SOC value of the second battery cell is equal to the discharge cut-off SOC value as the condition for stopping discharge, the actual SOC change of the second battery cell is the target SOC change, then the actual discharge amount of the target power battery is equal to the target discharge amount, and the SOC value of the first battery cell in the target power battery is less than the charging cut-off SOC value, which can better ensure the charging safety of the target power battery.

[0100] In some embodiments of the present application, Figure 1 ,like Figure 3 As shown, after the above step 102, the power battery charging control method provided in the embodiment of the present application may further include the following step 105, and the above step 103 may be specifically implemented through the following step 103b.

[0101] 105. Determine a charge cutoff voltage value according to a plurality of full-charge voltage values ​​corresponding to the charge cutoff SOC value.

[0102] Among them, the charging cut-off voltage value is greater than or equal to the minimum value of multiple full-charge voltage values, and less than or equal to the maximum value of multiple full-charge voltage values. The multiple full-charge voltage values ​​are voltage values ​​when the SOC values ​​of different battery cells are equal to the charging cut-off SOC value.

[0103] In some embodiments of the present application, multiple full-charge voltage values ​​are voltage values ​​when the SOC values ​​of different battery cells at different temperatures and different charging paths are equal to the charging cut-off SOC values. The specific values ​​can be determined based on actual conditions and are not limited here.

[0104] In some embodiments of the present application, the charge cutoff voltage value may be greater than or equal to a certain proportion (the specific proportion can be determined based on actual conditions and is not limited here) of the full-charge voltage values ​​among multiple full-charge voltage values. For example, the charge cutoff voltage value may be the maximum value among the multiple full-charge voltage values, or the minimum value among the multiple full-charge voltage values, or the average value among the multiple full-charge voltage values. The specific proportion can be determined based on actual conditions and is not limited here.

[0105] It should be noted that the charging cut-off voltage value is less than or equal to the voltage threshold of each cell of the target power battery.

[0106] 103b. When the voltage value of the first cell in the target power battery is equal to the charging cut-off voltage value, stop charging the target power battery.

[0107] Correspondingly, the first battery cell is the battery cell with the largest voltage in the target power battery.

[0108] In some embodiments of the present disclosure, since there is a certain error in the detection of the SOC value of the target power battery during the charging process, the target power battery is controlled to stop charging by using the charging cut-off voltage value corresponding to the charging cut-off SOC value, thereby ensuring the charging safety of the target power battery and accurately detecting whether the target power battery has reached the condition for stopping charging.

[0109] In an embodiment of the present application, whether to stop charging the target power battery can be determined only based on whether the voltage value of the first battery cell in the target power battery is equal to the charging cut-off voltage value, that is, when the voltage value of the first battery cell in the target power battery is equal to the charging cut-off voltage value, the target power battery is stopped from being charged, and when the voltage value of the first battery cell in the target power battery is less than the charging cut-off voltage value, the target power battery is continued to be charged.

[0110] In the embodiment of the present application, whether to stop charging the target power battery can also be determined in combination with whether the voltage value of the first battery cell in the target power battery is equal to the charging cut-off voltage value and other conditions. Other conditions may, for example, be whether the voltage value of the second battery cell in the target power battery is equal to the full-charge cut-off voltage value. For details, please refer to the following description.

[0111] In some embodiments of the present application, Figure 3 ,like Figure 4 As shown, after the above step 102, the power battery charging control method provided in the embodiment of the present application may further include the following steps 106, 1071 and 1072, and the above step 103b may be specifically implemented through the following step 103b1.

[0112] 106. Determine a full-charge cutoff voltage value based on multiple target full-charge voltage values ​​corresponding to the basic charging SOC value.

[0113] Among them, the full-charge cut-off voltage value is greater than or equal to the minimum value of multiple target full-charge voltage values, and less than or equal to the maximum value of multiple target full-charge voltage values. The multiple target full-charge voltage values ​​are voltage values ​​when the SOC values ​​of different battery cells are equal to the basic charging SOC value.

[0114] In some embodiments of the present application, multiple target full-charge voltage values ​​are voltage values ​​when the SOC values ​​of different battery cells are equal to the basic charging SOC values ​​at different temperatures and different charging paths. The specific values ​​can be determined based on actual conditions and are not limited here.

[0115] In some embodiments of the present application, the full-charge cutoff voltage value may be greater than or equal to a certain proportion (which may be determined based on actual conditions and is not limited herein) of multiple target full-charge voltage values. For example, the full-charge cutoff voltage value may be the maximum value of the multiple target full-charge voltage values, the minimum value of the multiple target full-charge voltage values, or the average value of the multiple target full-charge voltage values. The specific proportion may be determined based on actual conditions and is not limited herein.

[0116] It should be noted that the full-charge cut-off voltage value is less than or equal to the voltage threshold of each cell of the target power battery, and the full-charge cut-off voltage value is less than the charge cut-off voltage value.

[0117] 1071. Determine whether the voltage value of the first cell in the target power battery is equal to the charge cut-off voltage value, and whether the voltage value of the second cell in the target power battery is equal to the full-charge cut-off voltage value.

[0118] 103b1. When the voltage value of the first cell in the target power battery is equal to the charge cut-off voltage value, and the voltage value of the second cell in the target power battery is less than or equal to the full-charge cut-off voltage value, stop charging the target power battery.

[0119] 1072. When the voltage value of the first cell in the target power battery is less than the charge cut-off voltage value and the voltage value of the second cell in the target power battery is equal to the full-charge cut-off voltage value, stop charging the target power battery.

[0120] It can be understood that in the embodiment of the present application, it is simultaneously detected whether the voltage value of the first battery cell has reached the charge cut-off voltage value, and whether the voltage value of the second battery cell has reached the full charge cut-off voltage value. When the voltage value of the first battery cell is equal to the charge cut-off voltage value, and the voltage value of the second battery cell is less than or equal to the full charge cut-off voltage value, the voltage value of the first battery cell being equal to the charge cut-off voltage value is used as the judgment condition for stopping charging, and charging of the target power battery is stopped. Although the problem that the actual discharge amount of the target power battery from a fully charged state to a discharge cut-off state is less than the target discharge amount is not completely solved in this case, under the premise of ensuring the charging safety of the target power battery, the capacity of the target power battery in a fully charged state is improved to a certain extent, which also improves the actual discharge amount of the target power battery from a fully charged state to a discharge cut-off state to a certain extent; when the voltage value of the first battery cell is less than the charge cut-off voltage value However, when the voltage value of the second cell is equal to the full-charge cut-off voltage value, the voltage value of the second cell being equal to the full-charge cut-off voltage value is used as the judgment condition for stopping charging, and charging of the target power battery is stopped. In this case, although the capacity of the target power battery in the fully charged state has not reached the capacity corresponding to the charging cut-off voltage, the voltage value of the second cell has reached the full-charge cut-off voltage, that is, the SOC value of the second cell in the fully charged state has reached the basic charging SOC value (the sum of the target SOC change and the discharge cut-off SOC value). Therefore, the actual discharge amount of the target power battery from the fully charged state to the discharge cut-off state can reach the target discharge amount, thereby improving the actual discharge amount of the target power battery from the fully charged state to the discharge cut-off state and better ensuring the charging safety of the target power battery (it can prevent the charge state of the first cell from being too high when reaching the charging cut-off voltage, which may endanger the battery safety).

[0121] In some embodiments of the present application, Figure 4 ,like Figure 5 As shown, after the above step 106, the power battery charging control method provided in the embodiment of the present application may further include the following steps 108 and 109, and the above step 103b may be specifically implemented through the following step 103b1.

[0122] 108. When the SOC value corresponding to the real-time power level of the target power battery is less than or equal to the target display SOC value, the SOC value corresponding to the real-time power level is determined as the display SOC value.

[0123] 109. When the SOC value corresponding to the real-time power level is greater than the target display SOC value, the display SOC value is determined according to the voltage value of the first battery cell in the target power battery or the voltage value of the second battery cell in the target power battery, so that when charging of the target power battery is stopped, the display SOC value is the display SOC threshold.

[0124] The displayed SOC value is greater than the target displayed SOC value and less than or equal to the displayed SOC threshold value.

[0125] The displayed SOC value is the current SOC value of the target power battery displayed to the user in real time. The displayed SOC threshold is the displayed SOC value when the target power battery is fully charged. The target displayed SOC value can be determined based on actual conditions and is not limited here.

[0126] It can be understood that the SOC value corresponding to the real-time power of the target power battery is usually calculated based on the SOC value of each cell in the target power battery. However, since the present application solution increases the charging capacity of the target power battery, when the target power battery is fully charged, the displayed SOC value calculated based on the SOC value of each cell in the target power battery may exceed the displayed SOC threshold. Therefore, when the target power battery is fully charged, the displayed SOC value is inconsistent with the user's cognition (exceeds the displayed SOC threshold), and the user experience is poor. Therefore, it is necessary to control the displayed SOC value at the charging stop time according to the actual stop charging condition of the target power battery. The displayed SOC value is the displayed SOC threshold. Among them, if the voltage value of the first cell is equal to the charging cut-off voltage value as the stop charging condition, the displayed SOC value is determined according to the voltage value of the first cell, and the displayed SOC value is the displayed SOC threshold when the voltage value of the first cell is equal to the charging cut-off voltage value; if the voltage value of the second cell is equal to the full charge cut-off voltage value as the stop charging condition, the displayed SOC value is determined according to the voltage value of the second cell, and the displayed SOC value is the displayed SOC threshold when the voltage value of the second cell is equal to the full charge cut-off voltage value.

[0127] In the embodiment of the present application, a target display SOC value is set. When the SOC value corresponding to the real-time power level of the target power battery is less than or equal to the target display SOC value, the SOC value corresponding to the real-time power level is determined as the display SOC value, that is, it is displayed according to the actual situation. When the SOC value corresponding to the real-time power level is greater than the target display SOC value, the display SOC value is determined based on the voltage value of the first battery cell in the target power battery or the voltage value of the second battery cell in the target power battery, so that when charging of the target power battery is stopped, the display SOC value is the display SOC threshold. In this way, the display SOC value can be controlled to be the display SOC threshold when the target power battery stops charging, which does not exceed the user's cognition and can avoid a poor user experience.

[0128] In some embodiments of the present application, the above step 109 can be specifically implemented through the following step 109a or step 109b.

[0129] 109a. When the first difference is greater than or equal to the second difference, determine and display an SOC value according to the voltage value of the first battery cell in the target power battery.

[0130] 109b. When the first difference is less than the second difference, determine and display the SOC value according to the voltage value of the second battery cell in the target power battery.

[0131] The first difference is the difference between the voltage of the first cell in the target power battery and the charge cut-off voltage, and the second difference is the difference between the voltage of the second cell in the target power battery and the full charge cut-off voltage.

[0132] In an embodiment of the present application, based on the relationship between the difference between the voltage value of the first battery cell and the charge cut-off voltage value, and the difference between the voltage value of the second battery cell and the full-charge cut-off voltage value, the charging stop condition is determined to be whether the voltage value of the first battery cell is equal to the charge cut-off voltage value or the voltage value of the second battery cell is equal to the full-charge cut-off voltage value, so that the displayed SOC value can be better determined.

[0133] In some embodiments of the present application, interpolation processing can also be performed between the target displayed SOC value and the displayed SOC threshold based on the voltage value of the first battery cell in the target power battery or the voltage value of the second battery cell in the target power battery, so that the displayed SOC value can change smoothly before charging is stopped without sudden changes, which can further improve the user experience. The interpolation processing can be linear interpolation, staircase interpolation, cubic spline interpolation, etc., which can be determined according to the time situation and is not limited here.

[0134] In some embodiments of the present application, for the above-mentioned steps 103, 103a and 104, when the SOC value corresponding to the real-time power is greater than the target display SOC value, the display SOC value is determined according to the SOC value of the first battery cell or the SOC value of the second battery cell. For details, please refer to the relevant descriptions of the above-mentioned steps 109, 109a and 109b, which will not be repeated here.

[0135] This application also provides a power battery charging control device, Figure 6 This is a schematic diagram of the structure of a power battery charging control device provided in this application, such as Figure 6 As shown, the power battery charging control device includes: an acquisition module 601, a determination module 602 and a charging stop module 603; wherein:

[0136] The acquisition module 601 is used to obtain a target SOC difference value, which is used to indicate the difference between the SOC value of the first cell and the SOC value of the second cell of the power battery in a fully charged state. The first cell is the cell with the largest SOC value in the power battery in a fully charged state, and the second cell is the cell with the smallest SOC value in the power battery in a fully charged state. The determination module 602 is used to determine the charging cut-off SOC value of the target power battery based on the relationship between the redundant charging SOC value and the cell SOC threshold value, wherein the redundant charging SOC value is the sum of the target SOC difference value and the basic charging SOC value, and the basic charging SOC value is the target SOC difference value. The target SOC change is the sum of the basic charging SOC value and the discharge cut-off SOC value, the target SOC change is the SOC change corresponding to the target discharge amount of the target power battery from the fully charged state to the discharge cut-off state, the cell SOC threshold is the maximum SOC value allowed for the cell in the target power battery while ensuring the charging safety of the target power battery, the charge cut-off SOC value is greater than the basic charging SOC value, and is less than or equal to the smaller value of the cell SOC threshold and the redundant charging SOC value; a charging stop module 603 is used to stop charging the target power battery when the SOC value of the first cell in the target power battery is equal to the charge cut-off SOC value.

[0137] In some embodiments of the present application, the device also includes: a judgment module, which is used to judge whether the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value and whether the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value before stopping charging the target power battery when the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value; and a charging stop module 603, which is specifically used to stop charging the target power battery when the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value and the SOC value of the second battery cell in the target power battery is less than or equal to the basic charging SOC value.

[0138] In some embodiments of the present application, the charging stop module 603 is further used to, after determining whether the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value and whether the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value, stop charging the target power battery if the SOC value of the first battery cell in the target power battery is less than the charging cut-off SOC value and the SOC value of the second battery cell in the target power battery is equal to the basic charging SOC value.

[0139] In some embodiments of the present application, the determination module 602 is further used to determine the charging cutoff voltage value according to multiple full-charge voltage values ​​corresponding to the charging cutoff SOC value after determining the charging cutoff SOC value of the target power battery based on the relationship between the redundant charging SOC value and the battery cell SOC threshold, where the charging cutoff voltage value is greater than or equal to the minimum value of the multiple full-charge voltage values ​​and less than or equal to the maximum value of the multiple full-charge voltage values, and the multiple full-charge voltage values ​​are voltage values ​​when the SOC values ​​of different battery cells are equal to the charging cutoff SOC value; the charging stop module 603 is specifically used to stop charging the target power battery when the voltage value of the first battery cell in the target power battery is equal to the charging cutoff voltage value.

[0140] In some embodiments of the present application, the determination module 602 is further used to determine a full-charge cutoff voltage value based on multiple target full-charge voltage values ​​corresponding to the basic charging SOC value, where the full-charge cutoff voltage value is greater than or equal to the minimum value of the multiple target full-charge voltage values ​​and less than or equal to the maximum value of the multiple target full-charge voltage values, and the multiple target full-charge voltage values ​​are voltage values ​​when the SOC values ​​of different battery cells are equal to the basic charging SOC value; the device also includes: a judgment module, used to determine whether the voltage value of the first battery cell in the target power battery is equal to the charging cutoff voltage value and whether the voltage value of the second battery cell in the target power battery is equal to the full-charge cutoff voltage value before stopping charging the target power battery when the voltage value of the first battery cell in the target power battery is equal to the charging cutoff voltage value; the charging stop module 603 is specifically used to stop charging the target power battery when the voltage value of the first battery cell in the target power battery is equal to the charging cutoff voltage value and the voltage value of the second battery cell in the target power battery is less than or equal to the full-charge cutoff voltage value.

[0141] In some embodiments of the present application, the charging stop module 603 is further used to, after determining whether the voltage value of the first battery cell in the target power battery is equal to the charging cut-off voltage value and whether the voltage value of the second battery cell in the target power battery is equal to the full-charge cut-off voltage value, stop charging the target power battery if the voltage value of the first battery cell in the target power battery is less than the charging cut-off voltage value and the voltage value of the second battery cell in the target power battery is equal to the full-charge cut-off voltage value.

[0142] In some embodiments of the present application, the determination module 602 is further used to determine the SOC value corresponding to the real-time power level of the target power battery as the display SOC value when the SOC value corresponding to the real-time power level of the target power battery is less than or equal to the target display SOC value; when the SOC value corresponding to the real-time power level is greater than the target display SOC value, determine the display SOC value according to the voltage value of the first battery cell in the target power battery or the voltage value of the second battery cell in the target power battery, so that when charging of the target power battery is stopped, the display SOC value is the display SOC threshold, and the display SOC value is greater than the target display SOC value and less than or equal to the display SOC threshold.

[0143] In some embodiments of the present application, the determination module 602 is specifically used to determine the displayed SOC value based on the voltage value of the first battery cell in the target power battery when the first difference is greater than or equal to the second difference; and to determine the displayed SOC value based on the voltage value of the second battery cell in the target power battery when the first difference is less than the second difference; wherein the first difference is the difference between the voltage value of the first battery cell in the target power battery and the charging cut-off voltage value, and the second difference is the difference between the voltage value of the second battery cell in the target power battery and the full-charge cut-off voltage value.

[0144] In some embodiments of the present application, the acquisition module 601 is specifically used to obtain multiple SOC difference values ​​corresponding to multiple power batteries, each SOC difference value is the SOC difference value of a different power battery; based on the multiple SOC difference values, a target SOC difference value is determined, and the target SOC difference value is greater than or equal to the minimum value of the multiple SOC difference values ​​and less than or equal to the maximum value of the multiple SOC difference values.

[0145] In some embodiments of the present application, the acquisition module 601 is specifically used to count the number of full-charge times of the power battery corresponding to each SOC difference value to obtain multiple full-charge times; determine the target SOC difference value based on the multiple SOC difference values ​​and the multiple full-charge times, the target SOC difference value is greater than or equal to the minimum value of the multiple first SOC difference values, and is less than or equal to the maximum value of the multiple first SOC difference values, and the multiple first SOC difference values ​​are the respective SOC difference values ​​whose corresponding full-charge times are greater than or equal to the times threshold.

[0146] In some embodiments of the present application, the acquisition module 601 is specifically used to obtain multiple mapping relationships, each mapping relationship is used to indicate the correspondence between the SOC and OCV of different battery cells of different power batteries; obtain the voltage of each battery cell of each power battery in a fully charged state; determine the SOC value of each battery cell of each power battery in a fully charged state based on the voltage of each battery cell of each power battery in a fully charged state and the corresponding mapping relationship; calculate the SOC difference value of each power battery in a fully charged state according to the SOC value of each battery cell of each power battery in a fully charged state, and obtain multiple SOC difference values.

[0147] It should be noted that the above-mentioned power battery charging control device can be the electronic device in the above-mentioned method embodiment of this application, or it can be a functional module and / or functional entity in the electronic device that can realize the functions of the device embodiment, and the embodiment of this application is not limited.

[0148] In the embodiment of the present application, each module can implement the power battery charging control method provided by the above method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0149] Figure 7 The structural diagram of an electronic device provided in the embodiment of the present application is used to exemplify the electronic device that implements any power battery charging control method in the embodiment of the present application, and should not be understood as a specific limitation on the embodiment of the present application.

[0150] like Figure 7 As shown, the electronic device 700 may include a processor (e.g., a central processing unit, a graphics processing unit, etc.) 701, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 702 or a program loaded from a storage device 708 into a random access memory (RAM) 703. Various programs and data required for the operation of the electronic device 700 are also stored in the RAM 703. The processor 701, the ROM 702, and the RAM 703 are connected to each other via a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0151] Typically, the following devices may be connected to the I / O interface 705: an input device 706 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 707 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 708 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 709. The communication device 709 may allow the electronic device 700 to communicate with other devices wirelessly or by wire to exchange data. Although the electronic device 700 is shown as having various devices, it should be understood that it is not required to implement or have all of the devices shown. More or fewer devices may be implemented or have alternatively.

[0152] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program comprising a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network via the communication device 709, or installed from the storage device 708, or installed from the ROM 702. When the computer program is executed by the processor 701, the functions defined in any power battery charging control method provided in the embodiment of the present application can be executed.

[0153] It should be noted that the computer-readable medium mentioned above in this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. Computer-readable storage media can be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or devices, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this application, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, device, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. This propagated data signal can take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to wires, optical cables, RF (radio frequency), etc., or any suitable combination thereof.

[0154] In some embodiments, the client and server can communicate using any currently known or future developed network protocol, such as HTTP (HyperText Transfer Protocol), and can be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or future developed network.

[0155] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0156] The computer-readable medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device: obtains a target SOC difference value, where the target SOC difference value indicates the difference between the SOC value of a first cell and the SOC value of a second cell of the power battery in a fully charged state, where the first cell is the cell with the largest SOC value in the power battery in a fully charged state, and the second cell is the cell with the smallest SOC value in the power battery in a fully charged state; determines a target charging cutoff SOC value of the power battery based on a relationship between a redundant charging SOC value and a cell SOC threshold, where the redundant charging SOC value is the sum of the target SOC difference value and the basic charging SOC value. The basic charging SOC value is the sum of the target SOC change and the discharge cut-off SOC value. The target SOC change is the SOC change corresponding to the target discharge amount of the target power battery from the fully charged state to the discharge cut-off state. The cell SOC threshold is the maximum SOC value allowed for the cell in the target power battery while ensuring the charging safety of the target power battery. The charge cut-off SOC value is greater than the basic charging SOC value and is less than or equal to the smaller value of the cell SOC threshold and the redundant charging SOC value. When the SOC value of the first cell in the target power battery is equal to the charge cut-off SOC value, charging of the target power battery is stopped.

[0157] In an embodiment of the present application, a computer program code for performing the operations of the present application can be written in one or more programming languages ​​or a combination thereof, and the above-mentioned programming languages ​​include but are not limited to object-oriented programming languages, such as Java, Smalltalk, C++, and also include conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the computer, partially on the computer, as an independent software package, partially on the computer and partially on a remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0158] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0159] The units involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of a unit does not, in some cases, constitute a limitation on the unit itself.

[0160] The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, and without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chip (SOCs), complex programmable logic devices (CPLDs), and the like.

[0161] In the context of the present application, computer-readable medium can be a tangible medium that can contain or store a program for use by an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. Computer-readable medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. More specific examples of computer-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0162] An embodiment of the present application further provides a vehicle, comprising: the above-mentioned power battery charging control device, or the above-mentioned electronic device, or the above-mentioned computer-readable storage medium.

[0163] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the above-mentioned disclosed concepts. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0164] In addition, although adopting specific order to describe each operation, this should not be interpreted as requiring these operations to be executed in the specific order shown or in sequential order.Under certain environment, multitasking and parallel processing may be advantageous.Similarly, although comprising some specific implementation details in the above discussion, these should not be interpreted as limiting the scope of the application.Some features described in the context of separate embodiment can also be implemented in a single embodiment in combination.On the contrary, the various features described in the context of a single embodiment also can be implemented in multiple embodiments individually or in the mode of any suitable subcombination.

[0165] Although the subject matter has been described in language specific to structural features and / or methodological logical acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

Claims

1. A power battery charging control method, characterized in that: The method comprises: Obtaining a target SOC difference value, where the target SOC difference value indicates a difference between an SOC value of a first battery cell and an SOC value of a second battery cell of a power battery in a fully charged state, where the first battery cell is a battery cell with a maximum SOC value in the power battery in a fully charged state, and the second battery cell is a battery cell with a minimum SOC value in the power battery in a fully charged state; Determine a charge cutoff SOC value of the target power battery based on a relationship between a redundant charge SOC value and a cell SOC threshold, wherein the redundant charge SOC value is the sum of the target SOC difference value and the basic charge SOC value, the basic charge SOC value is the sum of the target SOC change and the discharge cutoff SOC value, and the target SOC change is the SOC change corresponding to the target discharge amount of the target power battery from a fully charged state to a discharge cutoff state; the cell SOC threshold is the maximum SOC value allowed for the cells in the target power battery while ensuring charging safety of the target power battery; the charge cutoff SOC value is greater than the basic charge SOC value and less than or equal to the smaller value of the cell SOC threshold and the redundant charge SOC value; When the SOC value of the first battery cell in the target power battery is equal to the charge cut-off SOC value, charging of the target power battery is stopped.

2. The method according to claim 1, characterized in that When the SOC value of the first cell in the target power battery is equal to the charge cut-off SOC value, before stopping charging the target power battery, the method further includes: Determining whether the SOC value of the first battery cell in the target power battery is equal to the charge cutoff SOC value, and whether the SOC value of the second battery cell in the target power battery is equal to the basic charge SOC value; When the SOC value of the first battery cell in the target power battery is equal to the charge cut-off SOC value, stopping charging the target power battery includes: When the SOC value of the first battery cell in the target power battery is equal to the charge cutoff SOC value and the SOC value of the second battery cell in the target power battery is less than or equal to the basic charge SOC value, charging of the target power battery is stopped.

3. The method according to claim 2, characterized in that After determining whether the SOC value of the first battery cell in the target power battery is equal to the charge cutoff SOC value and whether the SOC value of the second battery cell in the target power battery is equal to the basic charge SOC value, the method further includes: When the SOC value of the first battery cell in the target power battery is less than the charge cutoff SOC value and the SOC value of the second battery cell in the target power battery is equal to the basic charge SOC value, charging of the target power battery is stopped.

4. The method according to claim 1, wherein After determining the charging cutoff SOC value of the target power battery based on the relationship between the redundant charging SOC value and the battery cell SOC threshold, the method further includes: Determining a charge cutoff voltage value according to a plurality of full-charge voltage values ​​corresponding to the charge cutoff SOC value, wherein the charge cutoff voltage value is greater than or equal to a minimum value among the plurality of full-charge voltage values ​​and less than or equal to a maximum value among the plurality of full-charge voltage values, and the plurality of full-charge voltage values ​​are voltage values ​​when the SOC values ​​of different battery cells are equal to the charge cutoff SOC value; When the SOC value of the first battery cell in the target power battery is equal to the charge cut-off SOC value, stopping charging the target power battery includes: When the voltage value of the first battery cell in the target power battery is equal to the charging cut-off voltage value, charging of the target power battery is stopped.

5. The method according to claim 4, characterized in that The method further comprises: Determining a full-charge cutoff voltage value according to multiple target full-charge voltage values ​​corresponding to the basic charging SOC value, wherein the full-charge cutoff voltage value is greater than or equal to a minimum value among the multiple target full-charge voltage values ​​and less than or equal to a maximum value among the multiple target full-charge voltage values, and the multiple target full-charge voltage values ​​are voltage values ​​when the SOC values ​​of different battery cells are equal to the basic charging SOC value; When the voltage value of the first cell in the target power battery is equal to the charging cut-off voltage value, before stopping charging the target power battery, the method further includes: determining whether a voltage value of the first battery cell in the target power battery is equal to the charge cut-off voltage value, and whether a voltage value of the second battery cell in the target power battery is equal to the full-charge cut-off voltage value; When the voltage value of the first battery cell in the target power battery is equal to the charging cut-off voltage value, stopping charging the target power battery includes: When the voltage of the first cell in the target power battery is equal to the charge cut-off voltage, and the voltage of the second cell in the target power battery is less than or equal to the full-charge cut-off voltage, charging of the target power battery is stopped.

6. The method according to claim 5, characterized in that After determining whether the voltage value of the first cell in the target power battery is equal to the charge cut-off voltage value and whether the voltage value of the second cell in the target power battery is equal to the full-charge cut-off voltage value, the method further includes: When the voltage of the first cell in the target power battery is less than the charge cut-off voltage and the voltage of the second cell in the target power battery is equal to the full-charge cut-off voltage, charging of the target power battery is stopped.

7. The method according to claim 6, characterized in that The method further comprises: When the SOC value corresponding to the real-time power level of the target power battery is less than or equal to the target display SOC value, determining the SOC value corresponding to the real-time power level as the display SOC value; When the SOC value corresponding to the real-time power level is greater than the target display SOC value, the display SOC value is determined according to the voltage value of the first battery cell in the target power battery or the voltage value of the second battery cell in the target power battery, so that when charging of the target power battery is stopped, the display SOC value is a display SOC threshold, and the display SOC value is greater than the target display SOC value and less than or equal to the display SOC threshold.

8. The method according to claim 7, characterized in that The determining the displayed SOC value according to the voltage value of the first battery cell in the target power battery or the voltage value of the second battery cell in the target power battery includes: When the first difference is greater than or equal to the second difference, determining the displayed SOC value according to the voltage value of the first battery cell in the target power battery; When the first difference is less than the second difference, determining the displayed SOC value according to the voltage value of the second battery cell in the target power battery; The first difference is the difference between the voltage of the first cell in the target power battery and the charge cut-off voltage, and the second difference is the difference between the voltage of the second cell in the target power battery and the full-charge cut-off voltage.

9. The method according to any one of claims 1 to 8, characterized in that The obtaining of the target SOC difference value includes: Obtain multiple SOC difference values ​​corresponding to multiple power batteries, each SOC difference value being an SOC difference value of a different power battery; The target SOC difference value is determined according to the plurality of SOC difference values, wherein the target SOC difference value is greater than or equal to a minimum value among the plurality of SOC difference values ​​and less than or equal to a maximum value among the plurality of SOC difference values.

10. The method according to claim 9, characterized in that The determining the target SOC difference value according to the multiple SOC difference values ​​includes: Counting the number of full-charge times of the power battery corresponding to each SOC difference value to obtain a plurality of full-charge times; The target SOC difference value is determined based on the multiple SOC difference values ​​and the multiple full-charge times. The target SOC difference value is greater than or equal to a minimum value among the multiple first SOC difference values ​​and less than or equal to a maximum value among the multiple first SOC difference values. The multiple first SOC difference values ​​are the respective SOC difference values ​​whose corresponding full-charge times are greater than or equal to a times threshold.

11. The method according to claim 9, characterized in that The obtaining of multiple SOC difference values ​​includes: Acquire multiple mapping relationships, each mapping relationship is used to indicate a corresponding relationship between the SOC and the open circuit voltage (OCV) of different cells of different power batteries; Obtaining the voltage of each cell of each power battery in a fully charged state; Determining an SOC value of each cell of each power battery in a fully charged state based on the voltage of each cell of each power battery in a fully charged state and the corresponding mapping relationship; According to the SOC value of each cell of each power battery in a fully charged state, the SOC difference value of each power battery in a fully charged state is calculated to obtain the multiple SOC difference values.

12. A power battery charging control device, characterized in that: include: Acquisition module, determination module and stop charging module; The acquisition module is configured to acquire a target SOC difference value, wherein the target SOC difference value is used to indicate a difference between an SOC value of a first battery cell and an SOC value of a second battery cell of a power battery in a fully charged state, wherein the first battery cell is a battery cell having a maximum SOC value in the power battery in a fully charged state, and the second battery cell is a battery cell having a minimum SOC value in the power battery in a fully charged state; The determination module is configured to determine a charge cutoff SOC value of a target power battery based on a relationship between a redundant charge SOC value and a cell SOC threshold, wherein the redundant charge SOC value is the sum of the target SOC difference value and a basic charge SOC value, the basic charge SOC value is the sum of a target SOC variation and a discharge cutoff SOC value, and the target SOC variation is an SOC variation corresponding to a target discharge amount of the target power battery from a fully charged state to a discharge cutoff state; the cell SOC threshold is a maximum SOC value allowed for cells in the target power battery while ensuring charging safety of the target power battery; the charge cutoff SOC value is greater than the basic charge SOC value and is less than or equal to the smaller of the cell SOC threshold and the redundant charge SOC value; The charging stop module is configured to stop charging the target power battery when the SOC value of the first battery cell in the target power battery is equal to the charging cut-off SOC value.

13. An electronic device, characterized in that: include: A processor, the processor being configured to execute a computer program stored in a memory, wherein the computer program, when executed by the processor, implements the steps of the power battery charging control method according to any one of claims 1 to 11.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the power battery charging control method according to any one of claims 1 to 11 are implemented.

15. A vehicle, characterized in that: include: The power battery charging control device according to claim 12, or the electronic device according to claim 13, or including the computer-readable storage medium according to claim 14.

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