Self-adaptive calibration method and device for state of charge of battery

Abstract

The invention relates to the technical field of state-of-charge calibration, and discloses a battery state-of-charge self-adaptive calibration method and device, and the method comprises the steps: judging whether a to-be-calibrated battery meets a charging and discharging mode confirmation condition or not according to a target cumulative capacity parameter of the to-be-calibrated battery, and if yes, carrying out the self-adaptive calibration of the battery state-of-charge according to the target cumulative capacity parameter; determining a current charging and discharging mode of the battery to be calibrated; and based on the current charging and discharging mode, performing target state-of-charge calibration operation on the to-be-calibrated battery to obtain a calibrated state-of-charge value of the to-be-calibrated battery. It can be seen that when it is judged that the to-be-calibrated battery meets the charging and discharging mode confirmation condition according to the target accumulated capacity parameter, the current charging and discharging mode of the to-be-calibrated battery is determined, and the state of charge calibration is performed on the to-be-calibrated battery according to the current charging and discharging mode, so that the calibration efficiency is improved. The reliability and the accuracy of determining the charge state value of the to-be-calibrated battery are improved, so that the judgment accuracy of the running state of the to-be-calibrated battery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of state of charge calibration, and in particular to a method and device for adaptively calibrating the state of charge of a battery. Background Art

[0002] SOC (State of Charge), the state of charge of a power battery, is a key indicator for measuring the remaining power of a battery. It has a direct impact on the range, battery efficiency and safety of electric vehicles. In order to ensure the accuracy of the SOC value, the open circuit voltage method is often used in engineering to estimate the SOC value of a power battery.

[0003] The open circuit voltage method measures the open circuit voltage of the battery after it has been stationary for a long time, and converts the battery's state of charge value based on the empirical relationship between the battery's open circuit voltage and SOC. However, it has been found through practice that this traditional SOC determination method has significant limitations: first, the open circuit voltage method requires the battery to be stationary for a long time, which is difficult to achieve in practical applications, especially when electric vehicles are frequently charged and discharged; second, the open circuit voltage method is greatly affected by the charging and discharging conditions, and for batteries with a long plateau period such as lithium iron phosphate cells, its accuracy will be affected, making it difficult to determine the battery's operating status. It can be seen that it is particularly important to provide a method that can improve the accuracy of determining the battery's state of charge. Summary of the invention

[0004] The present application provides a method and device for adaptively calibrating the state of charge of a battery, which improves the reliability and accuracy of determining the state of charge value of a battery to be calibrated, thereby facilitating improving the accuracy of determining the operating state of the battery to be calibrated.

[0005] In order to solve the above technical problems, the first aspect of the present application discloses a method for adaptively calibrating a battery state of charge, the method comprising:

[0006] Acquiring a target cumulative capacity parameter of the battery to be calibrated, and judging whether the battery to be calibrated meets a preset charge and discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated;

[0007] When it is determined that the battery to be calibrated meets the charge and discharge mode confirmation condition, determining a current charge and discharge mode of the battery to be calibrated according to a target cumulative capacity parameter of the battery to be calibrated;

[0008] Based on the current charge and discharge mode of the battery to be calibrated, determining a current value of an operating current of the battery to be calibrated in the current charge and discharge mode and a duration of the operating current;

[0009] Perform a target state of charge calibration operation on the battery to be calibrated based on the current value of the operating current of the battery to be calibrated and the duration of the operating current, and obtain the calibrated state of charge value of the battery to be calibrated.

[0010] As an alternative implementation, in the first aspect of the present application, the target cumulative capacity parameter of the battery to be calibrated includes the cumulative discharge capacity parameter and the cumulative charge capacity parameter of the battery to be calibrated;

[0011] Among them, the step of determining whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated includes:

[0012] Calculate the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter according to the cumulative discharge capacity parameter and the cumulative charge capacity parameter of the battery to be calibrated, and determine whether the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the first rated capacity parameter of the preset battery to be calibrated;

[0013] When it is determined that the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the target rated capacity parameter of the battery to be calibrated, determine the maximum cumulative capacity parameter of the battery to be calibrated from the cumulative discharge capacity parameter and the cumulative charge capacity parameter, and determine whether the maximum cumulative capacity parameter of the battery to be calibrated is greater than the second rated capacity parameter of the preset battery to be calibrated;

[0014] When the judgment result is yes, determine that the battery to be calibrated meets the preset charge-discharge mode confirmation condition;

[0015] When the judgment result is no, determine that the battery to be calibrated does not meet the charge-discharge mode confirmation condition.

[0016] As an alternative implementation, in the first aspect of the present application, the method further includes:

[0017] When it is determined that the battery to be calibrated does not meet the charge-discharge mode confirmation condition, perform a clearing operation on the target cumulative capacity parameter of the battery to be calibrated, and re-trigger the operation of obtaining the target cumulative capacity parameter of the battery to be calibrated and determining whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated.

[0018] As an alternative implementation, in the first aspect of the present application, the step of performing a target state of charge calibration operation on the battery to be calibrated based on the current value of the operating current of the battery to be calibrated and the duration of the operating current, and obtaining the calibrated state of charge value of the battery to be calibrated, includes:

[0019] Determine whether the current value of the working current of the battery to be calibrated is less than a preset current threshold;

[0020] When it is determined that the current value of the working current is greater than or equal to the current threshold, perform a state-of-charge calibration operation on the battery to be calibrated by ampere-hour integration to obtain the calibrated state-of-charge value of the battery to be calibrated;

[0021] When it is determined that the current value of the working current is less than the current threshold, determine whether the duration of the working current is greater than or equal to a preset duration threshold;

[0022] When it is determined that the duration of the working current is less than the duration threshold, perform a state-of-charge calibration operation on the battery to be calibrated by the ampere-hour integration method to obtain the calibrated state-of-charge value of the battery to be calibrated.

[0023] As an optional implementation manner, in the first aspect of the present application, the method further includes:

[0024] When it is determined that the duration of the working current is greater than or equal to the duration threshold, perform a calibration operation on the current open-circuit voltage of the battery to be calibrated to obtain the calibrated open-circuit voltage of the battery to be calibrated;

[0025] Perform a state-of-charge calibration operation on the battery to be calibrated according to the current charge-discharge mode of the battery to be calibrated and the calibrated open-circuit voltage of the battery to be calibrated to obtain the calibrated state-of-charge value of the battery to be calibrated.

[0026] As an optional implementation manner, in the first aspect of the present application, the performing a state-of-charge calibration operation on the battery to be calibrated according to the current charge-discharge mode of the battery to be calibrated and the calibrated open-circuit voltage of the battery to be calibrated to obtain the calibrated state-of-charge value of the battery to be calibrated includes:

[0027] Determine an open-circuit voltage-state-of-charge relationship table for the current charge-discharge mode according to the current charge-discharge mode of the battery to be calibrated;

[0028] Determine the current state-of-charge value of the battery to be calibrated according to the open-circuit voltage-state-of-charge relationship table for the current charge-discharge mode and the calibrated open-circuit voltage of the battery to be calibrated;

[0029] Determine the target slope parameter of the battery to be calibrated according to the current state-of-charge value of the battery to be calibrated and the calibrated open-circuit voltage of the battery to be calibrated, and use it as the calibration weight parameter of the battery to be calibrated;

[0030] Obtain the previous state of charge value corresponding to the battery to be calibrated at the previous moment, and perform a state of charge calibration operation on the battery to be calibrated according to the current state of charge value of the battery to be calibrated, the calibration weight parameter, and the previous state of charge value, so as to obtain the calibrated state of charge value of the battery to be calibrated.

[0031] As an alternative implementation, in the first aspect of the present application, the calibrated state of charge value of the battery to be calibrated is:

[0032] SOC cor =W*SOC present +(1 - W)*SOC previous ;

[0033] where W is the calibration weight parameter of the battery to be calibrated, SOC present is the current state of charge value of the battery to be calibrated, and SOC previous is the previous state of charge value of the battery to be calibrated.

[0034] As an alternative implementation, in the first aspect of the present application, when the previous state of charge value of the battery to be calibrated is the state of charge value corresponding to the battery to be calibrated at the initial moment, the previous state of charge value of the battery to be calibrated is determined based on the average voltage value of the battery to be calibrated.

[0035] The second aspect of the present application discloses an adaptive calibration device for the state of charge of a battery, and the device includes:

[0036] An acquisition module, configured to acquire the target cumulative capacity parameter of the battery to be calibrated;

[0037] A judgment module, configured to judge whether the battery to be calibrated meets a preset charge and discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated;

[0038] A determination module, configured to, when the judgment module determines that the battery to be calibrated meets the charge and discharge mode confirmation condition, determine the current charge and discharge mode of the battery to be calibrated according to the target cumulative capacity parameter of the battery to be calibrated; based on the current charge and discharge mode of the battery to be calibrated, determine the current value of the working current of the battery to be calibrated in the current charge and discharge mode and the duration of the working current;

[0039] A calibration module, configured to perform a target state of charge calibration operation on the battery to be calibrated through the current value of the working current of the battery to be calibrated and the duration of the working current, so as to obtain the calibrated state of charge value of the battery to be calibrated.

[0040] As an alternative implementation, in the second aspect of the present application, the target cumulative capacity parameter of the battery to be calibrated includes the cumulative discharge capacity parameter and the cumulative charge capacity parameter of the battery to be calibrated;

[0041] Among them, the manner in which the determination module determines whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated specifically includes:

[0042] According to the cumulative discharge capacity parameter and the cumulative charge capacity parameter of the battery to be calibrated, calculate the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter, and determine whether the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the first rated capacity parameter of the preset battery to be calibrated;

[0043] When it is determined that the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the target rated capacity parameter of the battery to be calibrated, determine the maximum cumulative capacity parameter of the battery to be calibrated from the cumulative discharge capacity parameter and the cumulative charge capacity parameter, and determine whether the maximum cumulative capacity parameter of the battery to be calibrated is greater than the second rated capacity parameter of the preset battery to be calibrated;

[0044] When the determination result is yes, determine that the battery to be calibrated meets the preset charge-discharge mode confirmation condition;

[0045] When the determination result is no, determine that the battery to be calibrated does not meet the charge-discharge mode confirmation condition.

[0046] As an alternative implementation, in the second aspect of the present application, the device further includes:

[0047] A clearing module, configured to, when the determination module determines that the battery to be calibrated does not meet the charge-discharge mode confirmation condition, perform a clearing operation on the target cumulative capacity parameter of the battery to be calibrated, and re-trigger the acquisition module to execute the operation of acquiring the target cumulative capacity parameter of the battery to be calibrated and determining whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated.

[0048] As an alternative implementation, in the second aspect of the present application, the manner in which the calibration module performs a target state of charge calibration operation on the battery to be calibrated through the current value of the working current of the battery to be calibrated and the duration of the working current to obtain the calibrated state of charge value of the battery to be calibrated specifically includes:

[0049] Determine whether the current value of the working current of the battery to be calibrated is less than a preset current threshold;

[0050] When it is determined that the current value of the working current is greater than or equal to the current threshold, a state-of-charge calibration operation is performed on the battery to be calibrated by ampere-hour integration to obtain the calibrated state-of-charge value of the battery to be calibrated;

[0051] When it is determined that the current value of the working current is less than the current threshold, it is determined whether the duration of the working current is greater than or equal to a preset duration threshold;

[0052] When it is determined that the duration of the working current is less than the duration threshold, a state-of-charge calibration operation is performed on the battery to be calibrated by the ampere-hour integration to obtain the calibrated state-of-charge value of the battery to be calibrated.

[0053] As an optional implementation manner, in the second aspect of the present application, the manner in which the calibration module performs a target state-of-charge calibration operation on the battery to be calibrated based on the current charge and discharge mode of the battery to be calibrated to obtain the calibrated state-of-charge value of the battery to be calibrated further specifically includes:

[0054] When it is determined that the duration of the working current is greater than or equal to the duration threshold, a calibration operation is performed on the current open-circuit voltage of the battery to be calibrated to obtain the calibrated open-circuit voltage of the battery to be calibrated;

[0055] According to the current charge and discharge mode of the battery to be calibrated and the calibrated open-circuit voltage of the battery to be calibrated, a state-of-charge calibration operation is performed on the battery to be calibrated to obtain the calibrated state-of-charge value of the battery to be calibrated.

[0056] As an optional implementation manner, in the second aspect of the present application, the manner in which the calibration module performs a state-of-charge calibration operation on the battery to be calibrated according to the current charge and discharge mode of the battery to be calibrated and the calibrated open-circuit voltage of the battery to be calibrated to obtain the calibrated state-of-charge value of the battery to be calibrated specifically includes:

[0057] According to the current charge and discharge mode of the battery to be calibrated, an open-circuit voltage-state-of-charge relationship table for the current charge and discharge mode is determined;

[0058] According to the open-circuit voltage-state-of-charge relationship table for the current charge and discharge mode and the calibrated open-circuit voltage of the battery to be calibrated, the current state-of-charge value of the battery to be calibrated is determined;

[0059] According to the current state-of-charge value of the battery to be calibrated and the calibrated open-circuit voltage of the battery to be calibrated, the target slope parameter of the battery to be calibrated is determined as the calibration weight parameter of the battery to be calibrated;

[0060] Obtain the previous state of charge value corresponding to the battery to be calibrated at the previous moment, and perform a state of charge calibration operation on the battery to be calibrated according to the current state of charge value of the battery to be calibrated, the calibration weight parameter, and the previous state of charge value, so as to obtain the calibrated state of charge value of the battery to be calibrated.

[0061] As an optional implementation manner, in the second aspect of the present application, the calibrated state of charge value of the battery to be calibrated is:

[0062] SOC cor =W*SOC present +(1-W)*SOC previous ;

[0063] wherein, W is the calibration weight parameter of the battery to be calibrated, SOC present is the current state of charge value of the battery to be calibrated, and SOC previous is the previous state of charge value of the battery to be calibrated.

[0064] As an optional implementation manner, in the second aspect of the present application, when the previous state of charge value of the battery to be calibrated is the state of charge value corresponding to the battery to be calibrated at the initial moment, the previous state of charge value of the battery to be calibrated is determined based on the average voltage value of the battery to be calibrated.

[0065] The third aspect of the present application discloses another adaptive calibration device for the state of charge of a battery, and the device includes:

[0066] A memory storing executable program code;

[0067] A processor coupled to the memory;

[0068] The processor calls the executable program code stored in the memory and executes the adaptive calibration method for the state of charge of the battery disclosed in the first aspect of the present application.

[0069] The fourth aspect of the present application discloses a computer storage medium, and the computer storage medium stores computer instructions, which are used to execute the adaptive calibration method for the state of charge of the battery disclosed in the first aspect of the present application when called.

[0070] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0071] In the embodiments of the present application, according to the target cumulative capacity parameter of the battery to be calibrated, it is determined whether the battery to be calibrated meets the charge and discharge mode confirmation condition. If so, according to the target cumulative capacity parameter, the current charge and discharge mode of the battery to be calibrated is determined; based on the current charge and discharge mode, a target state of charge calibration operation is performed on the battery to be calibrated to obtain the calibrated state of charge value of the battery to be calibrated. It can be seen that implementing the present application can determine the current charge and discharge mode of the battery to be calibrated when it is determined that the battery to be calibrated meets the charge and discharge mode confirmation condition according to the target cumulative capacity parameter, and perform state of charge calibration on the battery to be calibrated according to the current charge and discharge mode. In this way, the reliability and accuracy of determining the state of charge value of the battery to be calibrated are improved, which is beneficial to improving the accuracy of determining the operating state of the battery to be calibrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0073] Figure 1 is a schematic flowchart of an adaptive calibration method for the state of charge of a battery disclosed in an embodiment of the present application;

[0074] Figure 2 is a schematic flowchart of another adaptive calibration method for the state of charge of a battery disclosed in an embodiment of the present application;

[0075] Figure 3 is a schematic structural diagram of an adaptive calibration device for the state of charge of a battery disclosed in an embodiment of the present application;

[0076] Figure 4 is a schematic structural diagram of another adaptive calibration device for the state of charge of a battery disclosed in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0077] In order to enable those skilled in the art to better understand the solution of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0078] In the description, claims and the above-mentioned drawings of the present application, terms such as "first", "second", etc. are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or terminal that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or terminals.

[0079] Reference to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the description and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0080] The present application discloses an adaptive calibration method and device for the state of charge of a battery, which improves the reliability and accuracy of determining the state of charge value of the battery to be calibrated, thereby facilitating the improvement of the accuracy of determining the operating state of the battery to be calibrated.

[0081] Embodiment 1

[0082] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of an adaptive calibration method for the state of charge of a battery disclosed in an embodiment of the present application. Among them, Figure 1 the described adaptive calibration method for the state of charge of a battery can be applied to calibrate the state of charge of various types of batteries, such as lithium iron phosphate batteries, lithium manganese iron phosphate batteries, ternary batteries, lithium cobalt oxide batteries, lithium manganese oxide batteries, etc., and the embodiments of the present application do not make limitations. Optionally, this method can be implemented by a state of charge calibration device, which can be integrated in a battery management system, or can be a local server or a cloud server for processing the state of charge calibration process of the battery, etc., and the embodiments of the present application do not make limitations. As Figure 1 shown, the adaptive calibration method for the state of charge of the battery may include the following operations:

[0083] 101. Obtain the target cumulative capacity parameter of the battery to be calibrated, and determine whether the battery to be calibrated meets the preset charge and discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated.

[0084] In an embodiment of the present application, the charging capacity and the discharging capacity of the battery to be calibrated are respectively accumulated, and then the target cumulative capacity parameter of the battery to be calibrated is obtained, so as to determine whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition. Among them, the target cumulative capacity parameter of the battery to be calibrated includes the cumulative discharging capacity parameter and the cumulative charging capacity parameter of the battery to be calibrated.

[0085] 102. When it is determined that the battery to be calibrated meets the charge-discharge mode confirmation condition, the current charge-discharge mode of the battery to be calibrated is determined according to the target cumulative capacity parameter of the battery to be calibrated.

[0086] In an embodiment of the present application, after it is determined that the battery to be calibrated meets the preset charge-discharge mode confirmation condition, it can be determined whether the battery to be calibrated is in the charging mode or the discharging mode.

[0087] 103. Based on the current charge-discharge mode of the battery to be calibrated, determine the current value of the working current and the duration of the working current for the battery to be calibrated in the current charge-discharge mode; through the current value of the working current and the duration of the working current of the battery to be calibrated, perform a target state of charge calibration operation on the battery to be calibrated to obtain the calibrated state of charge value of the battery to be calibrated.

[0088] In an embodiment of the present application, where performing a target state of charge calibration operation on the battery to be calibrated may include performing a state of charge calibration on the battery to be calibrated based on the ampere-hour integration method, or may include performing a state of charge calibration on the battery to be calibrated based on the calibration weight parameter.

[0089] 104. When it is determined that the battery to be calibrated does not meet the charge-discharge mode confirmation condition, clear the target cumulative capacity parameter of the battery to be calibrated, and re-trigger the operation of obtaining the target cumulative capacity parameter of the battery to be calibrated in step 101 above, and determine whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated.

[0090] It can be seen that implementing the embodiment of the present application can determine the current charge-discharge mode of the battery to be calibrated when it is determined that the battery to be calibrated meets the charge-discharge mode confirmation condition according to the target cumulative capacity parameter, and perform a state of charge calibration on the battery to be calibrated based on the current charge-discharge mode, the ampere-hour integration method or the calibration weight parameter. In this way, the flexibility, reliability and accuracy of determining the state of charge value of the battery to be calibrated are improved, which is conducive to improving the accuracy of determining the operating state of the battery to be calibrated.

[0091] In an alternative embodiment, the determining whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated in step 101 above includes:

[0092] According to the cumulative discharge capacity parameter and the cumulative charge capacity parameter of the battery to be calibrated, calculate the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter, and determine whether the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the first rated capacity parameter of the preset battery to be calibrated;

[0093] When it is determined that the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the target rated capacity parameter of the battery to be calibrated, determine the maximum cumulative capacity parameter of the battery to be calibrated from the cumulative discharge capacity parameter and the cumulative charge capacity parameter, and determine whether the maximum cumulative capacity parameter of the battery to be calibrated is greater than the second rated capacity parameter of the preset battery to be calibrated;

[0094] When the judgment result is yes, determine that the battery to be calibrated meets the preset charge-discharge mode confirmation condition;

[0095] When the judgment result is no, determine that the battery to be calibrated does not meet the charge-discharge mode confirmation condition.

[0096] In this optional embodiment, for example, when it is determined that the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the n% rated capacity of the battery to be calibrated (that is, the first rated capacity parameter of the preset battery to be calibrated, that is, n% of the total capacity of the battery to be calibrated when fully charged), then determine the maximum value from the cumulative discharge capacity parameter and the cumulative charge capacity parameter, and determine whether this value is greater than the m% rated capacity of the battery to be calibrated (that is, the second rated capacity parameter of the preset battery to be calibrated, that is, m% of the total capacity of the battery to be calibrated when fully charged, where n>m); if so, determine the discharge mode or charge mode of the battery to be calibrated according to the maximum value; if not, that is, this judgment cannot be used as the confirmation of the charge-discharge mode, clear the cumulative charge-discharge capacity, and wait again for the next condition greater than the n% rated capacity of the battery to be calibrated.

[0097] In this optional embodiment, optionally, both the foregoing first rated capacity parameter and the second rated capacity parameter can be determined based on one or more of the type parameter of the battery to be calibrated, historical usage conditions, charge-discharge setting parameters, historical charge-discharge conditions, current charge-discharge environment parameters, and the like.

[0098] It can be seen that this optional embodiment can intelligently judge whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition through the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter and the maximum value among the cumulative discharge capacity parameter and the cumulative charge capacity parameter. In this way, the determination reliability and accuracy of whether the battery to be calibrated meets the charge-discharge mode confirmation condition are improved, and further, the reliability and accuracy of the subsequent state-of-charge calibration of the battery to be calibrated are improved, thereby improving the accuracy of the analysis of the operating state of the battery to be calibrated and the use safety.

[0099] Example 2

[0100] Please refer to Figure 2 , Figure 2 , which is a schematic flow chart of another adaptive calibration method for the state of charge of a battery disclosed in an embodiment of the present application. Among them, Figure 2 The described adaptive calibration method for the state of charge of a battery can be applied to calibrate the state of charge of various types of batteries, such as lithium iron phosphate batteries, lithium manganese iron phosphate batteries, ternary batteries, lithium cobalt oxide batteries, lithium manganese oxide batteries, etc., and the embodiments of the present application do not make limitations. Optionally, this method can be implemented by a state of charge calibration device, which can be integrated in a battery management system, or can be a local server or a cloud server for processing the state of charge calibration process of the battery, etc., and the embodiments of the present application do not make limitations. As Figure 2 shown, the adaptive calibration method for the state of charge of this battery can include the following operations:

[0101] 201. Obtain the target cumulative capacity parameter of the battery to be calibrated, and determine whether the battery to be calibrated meets the preset charge and discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated.

[0102] 202. When it is determined that the battery to be calibrated meets the charge and discharge mode confirmation condition, determine the current charge and discharge mode of the battery to be calibrated according to the target cumulative capacity parameter of the battery to be calibrated.

[0103] 203. Based on the current charge and discharge mode of the battery to be calibrated, determine the current value of the working current and the duration of the working current for the battery to be calibrated in the current charge and discharge mode.

[0104] In the embodiment of the present application, if it is determined that the working current value of the battery to be calibrated in the charging mode is 0.08C and lasts for 10 minutes.

[0105] 204. Determine whether the current value of the working current of the battery to be calibrated is less than the preset current threshold.

[0106] 205. When it is determined that the current value of the working current is greater than or equal to the current threshold, perform a state of charge calibration operation on the battery to be calibrated by the ampere-hour integration method to obtain the calibrated state of charge value of the battery to be calibrated.

[0107] In an embodiment of the present application, the state of charge (SOC) calibration operation of the battery to be calibrated is performed by ampere-hour integration, that is, within a preset time period, the charge / discharge current of the battery to be calibrated is integrated to obtain the changed charge of the battery to be calibrated, and then the ratio relationship between the changed charge of the battery to be calibrated and the rated capacity of the battery to be calibrated is determined. Based on this ratio relationship and the previous SOC value corresponding to the battery to be calibrated at the previous moment, the calibrated SOC value of the battery to be calibrated is determined.

[0108] 206. When it is determined that the current value of the working current is less than the current threshold, it is determined whether the duration of the working current is greater than or equal to a preset duration threshold.

[0109] 207. When it is determined that the duration of the working current is less than the duration threshold, the SOC calibration operation of the battery to be calibrated is performed by ampere-hour integration to obtain the calibrated SOC value of the battery to be calibrated.

[0110] 208. When it is determined that the duration of the working current is greater than or equal to the duration threshold, the calibration operation is performed on the current open-circuit voltage of the battery to be calibrated to obtain the calibrated open-circuit voltage of the battery to be calibrated.

[0111] In an embodiment of the present application, that is, when it is determined that the current value of the working current of the battery to be calibrated is less than the current threshold and the duration of the working current is greater than or equal to the duration threshold (for example, the working current value of the battery to be calibrated is less than 0.1C and lasts for more than 5 minutes), the dynamic small-current OCV calibration condition of the battery to be calibrated can be triggered.

[0112] 209. According to the current charge / discharge mode of the battery to be calibrated and the calibrated open-circuit voltage of the battery to be calibrated, the SOC calibration operation of the battery to be calibrated is performed to obtain the calibrated SOC value of the battery to be calibrated.

[0113] In an embodiment of the present application, according to the current charge / discharge mode of the battery to be calibrated and the calibrated open-circuit voltage of the battery to be calibrated, it can be determined whether the open-circuit voltage - SOC relationship table for the current charging mode of the battery to be calibrated or the open-circuit voltage - SOC relationship table for the current discharging mode of the battery to be calibrated needs to be searched, so as to perform the SOC calibration operation on the battery to be calibrated.

[0114] In an embodiment of the present application, for other descriptions of steps 201 - 202, please refer to the detailed descriptions of steps 101 - 102 in Embodiment 1, which will not be repeated in this embodiment of the present application.

[0115] It can be seen that implementing the embodiments of the present application can determine whether the battery to be calibrated meets the trigger conditions for the dynamic small - current OCV calibration working condition according to the current charge - discharge mode of the battery to be calibrated, the current value of the working current, and the duration of the working current. Subsequently, when the judgment result is yes, a state - of - charge calibration operation is performed on the battery to be calibrated based on the current charge - discharge mode of the battery to be calibrated and the calibrated open - circuit voltage. In this way, the calibration requirements of the battery under different working conditions can be effectively addressed, thereby improving the calibration flexibility and accuracy for the battery to be calibrated, and providing strong technical support for the health management and performance optimization of the battery to be calibrated.

[0116] In an alternative embodiment, the operation of performing a state - of - charge calibration operation on the battery to be calibrated according to the current charge - discharge mode of the battery to be calibrated and the calibrated open - circuit voltage of the battery to be calibrated in step 209 above, to obtain the calibrated state - of - charge value of the battery to be calibrated, includes:

[0117] Determine the open - circuit voltage - state - of - charge relationship table for the current charge - discharge mode according to the current charge - discharge mode of the battery to be calibrated;

[0118] Determine the current state - of - charge value of the battery to be calibrated according to the open - circuit voltage - state - of - charge relationship table for the current charge - discharge mode and the calibrated open - circuit voltage of the battery to be calibrated;

[0119] Determine the target slope parameter of the battery to be calibrated according to the current state - of - charge value of the battery to be calibrated and the calibrated open - circuit voltage of the battery to be calibrated, and use it as the calibration weight parameter of the battery to be calibrated;

[0120] Obtain the previous state - of - charge value corresponding to the battery to be calibrated at the previous moment, and perform a state - of - charge calibration operation on the battery to be calibrated according to the current state - of - charge value of the battery to be calibrated, the calibration weight parameter, and the previous state - of - charge value, to obtain the calibrated state - of - charge value of the battery to be calibrated.

[0121] In this alternative embodiment, when the previous state - of - charge value of the battery to be calibrated is the state - of - charge value corresponding to the battery to be calibrated at the initial moment, the previous state - of - charge value of the battery to be calibrated is determined based on the average voltage value of the battery to be calibrated.

[0122] Furthermore, the calibrated state - of - charge value of the battery to be calibrated is:

[0123] SOC cor =W*SOC present +(1 - W)*SOC previous ;

[0124] Where, W is the calibration weight parameter of the battery to be calibrated, SOC present is the current state - of - charge value of the battery to be calibrated, SOCprevious is the previous state of charge value of the battery to be calibrated.

[0125] It should be noted that the calibration weight parameter W of the battery to be calibrated, that is, in the open-circuit voltage-state of charge relationship table under the current charge and discharge mode when triggering weight calibration, SOC present corresponding SOC-OCV slope (that is, the slope parameter between SOC present and the open-circuit voltage after calibration), where the larger W is, it indicates that the OCV-SOC curve corresponding to when triggering weight calibration is in the non-platform period, and the corresponding SOC present has a higher credibility.

[0126] It can be seen that this optional embodiment can determine the corresponding open-circuit voltage-state of charge relationship table through the current charge and discharge mode of the battery to be calibrated and the open-circuit voltage after calibration, and then obtain the current state of charge value of the battery to be calibrated, and calibrate the current state of charge value of the battery to be calibrated based on the calibration weight parameter of the battery to be calibrated. In this way, the influence of the current and previous state of charge values of the battery to be calibrated is balanced by the calibration weight parameter, improving the calibration flexibility and accuracy of the battery to be calibrated, and further improving the calibration applicability of the battery to be calibrated under different working conditions, thereby improving the calibration convenience and practicality of the battery to be calibrated.

[0127] Embodiment Three

[0128] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of an adaptive calibration device for the state of charge of a battery disclosed in an embodiment of the present application. As Figure 3 shown, the adaptive calibration device for the state of charge of the battery may include:

[0129] An acquisition module 301, configured to acquire the target cumulative capacity parameter of the battery to be calibrated;

[0130] A judgment module 302, configured to judge whether the battery to be calibrated meets a preset charge and discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated;

[0131] A determination module 303, configured to, when the judgment module 302 determines that the battery to be calibrated meets the charge and discharge mode confirmation condition, determine the current charge and discharge mode of the battery to be calibrated according to the target cumulative capacity parameter of the battery to be calibrated; based on the current charge and discharge mode of the battery to be calibrated, determine the current value of the working current and the duration of the working current for the battery to be calibrated under the current charge and discharge mode;

[0132] A calibration module 304, configured to perform a target state of charge calibration operation on a battery to be calibrated based on the current value of the working current of the battery to be calibrated and the duration of the working current, so as to obtain a calibrated state of charge value of the battery to be calibrated.

[0133] A clearing module 305, configured to, when the determination module 302 determines that the battery to be calibrated does not meet the charge-discharge mode confirmation condition, clear the target cumulative capacity parameter of the battery to be calibrated, and re-trigger the acquisition module 301 to execute the operation of acquiring the target cumulative capacity parameter of the battery to be calibrated, and determining whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition based on the target cumulative capacity parameter of the battery to be calibrated.

[0134] It can be seen that implementing Figure 3 the described adaptive calibration device for the state of charge of the battery can, when it is determined that the battery to be calibrated meets the charge-discharge mode confirmation condition based on the target cumulative capacity parameter, determine the current charge-discharge mode of the battery to be calibrated, and perform state of charge calibration on the battery to be calibrated according to the current charge-discharge mode, based on the ampere-hour integration method or the calibration weight parameter. In this way, the flexibility, reliability, and accuracy of determining the state of charge value of the battery to be calibrated are improved, which is conducive to improving the accuracy of determining the operating state of the battery to be calibrated.

[0135] In an optional embodiment, the target cumulative capacity parameter of the battery to be calibrated includes the cumulative discharge capacity parameter and the cumulative charge capacity parameter of the battery to be calibrated;

[0136] Among them, the manner in which the determination module 302 determines whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition based on the target cumulative capacity parameter of the battery to be calibrated specifically includes:

[0137] Calculate the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter based on the cumulative discharge capacity parameter and the cumulative charge capacity parameter of the battery to be calibrated, and determine whether the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the first rated capacity parameter of the preset battery to be calibrated;

[0138] When it is determined that the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the target rated capacity parameter of the battery to be calibrated, determine the maximum cumulative capacity parameter of the battery to be calibrated from the cumulative discharge capacity parameter and the cumulative charge capacity parameter, and determine whether the maximum cumulative capacity parameter of the battery to be calibrated is greater than the second rated capacity parameter of the preset battery to be calibrated;

[0139] When the determination result is yes, determine that the battery to be calibrated meets the preset charge-discharge mode confirmation condition;

[0140] When the determination result is no, determine that the battery to be calibrated does not meet the charge-discharge mode confirmation condition.

[0141] It can be seen that implementing Figure 3 the described adaptive calibration device for the state of charge of the battery can intelligently determine whether the battery to be calibrated meets the preset charge-discharge mode confirmation condition by using the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter, and the maximum value of the cumulative discharge capacity parameter and the cumulative charge capacity parameter. In this way, the determination reliability and accuracy of whether the battery to be calibrated meets the charge-discharge mode confirmation condition are improved. Furthermore, the calibration reliability and precision of the state of charge of the battery to be calibrated in the subsequent process are improved, thereby improving the analysis accuracy and use safety of the operating state of the battery to be calibrated.

[0142] In another optional embodiment, the calibration module 304 performs a target state of charge calibration operation on the battery to be calibrated through the current value of the working current of the battery to be calibrated and the duration of the working current. The specific method for obtaining the calibrated state of charge value of the battery to be calibrated includes:

[0143] Judge whether the current value of the working current of the battery to be calibrated is less than a preset current threshold;

[0144] When it is judged that the current value of the working current is greater than or equal to the current threshold, perform a state of charge calibration operation on the battery to be calibrated by the ampere-hour integration method to obtain the calibrated state of charge value of the battery to be calibrated;

[0145] When it is judged that the current value of the working current is less than the current threshold, judge whether the duration of the working current is greater than or equal to a preset duration threshold;

[0146] When it is judged that the duration of the working current is less than the duration threshold, perform a state of charge calibration operation on the battery to be calibrated by the ampere-hour integration method to obtain the calibrated state of charge value of the battery to be calibrated;

[0147] When it is judged that the duration of the working current is greater than or equal to the duration threshold, perform a calibration operation on the current open-circuit voltage of the battery to be calibrated to obtain the calibrated open-circuit voltage of the battery to be calibrated;

[0148] Perform a state of charge calibration operation on the battery to be calibrated according to the current charge-discharge mode of the battery to be calibrated and the calibrated open-circuit voltage of the battery to be calibrated to obtain the calibrated state of charge value of the battery to be calibrated.

[0149] It can be seen that implementing Figure 3The described adaptive calibration device for the state of charge of a battery can determine whether the battery to be calibrated meets the triggering conditions for the dynamic small - current OCV calibration working condition according to the current charge - discharge mode of the battery to be calibrated, the current value of the working current, and the duration of the working current. Then, when the judgment result is yes, based on the current charge - discharge mode of the battery to be calibrated and the calibrated open - circuit voltage, a state - of - charge calibration operation is performed on the battery to be calibrated. In this way, it can effectively meet the battery calibration requirements under different working conditions, and further improve the calibration flexibility and accuracy for the battery to be calibrated, thus providing strong technical support for the health management and performance optimization of the battery to be calibrated.

[0150] In another optional embodiment, the calibration module 304 performs a state - of - charge calibration operation on the battery to be calibrated according to the current charge - discharge mode of the battery to be calibrated and the calibrated open - circuit voltage of the battery to be calibrated, and the specific method for obtaining the calibrated state - of - charge value of the battery to be calibrated includes:

[0151] Determine the open - circuit voltage - state - of - charge relationship table for the current charge - discharge mode according to the current charge - discharge mode of the battery to be calibrated;

[0152] Determine the current state - of - charge value of the battery to be calibrated according to the open - circuit voltage - state - of - charge relationship table for the current charge - discharge mode and the calibrated open - circuit voltage of the battery to be calibrated;

[0153] Determine the target slope parameter of the battery to be calibrated as the calibration weight parameter of the battery to be calibrated according to the current state - of - charge value of the battery to be calibrated and the calibrated open - circuit voltage of the battery to be calibrated;

[0154] Obtain the previous state - of - charge value corresponding to the battery to be calibrated at the previous moment, and perform a state - of - charge calibration operation on the battery to be calibrated according to the current state - of - charge value of the battery to be calibrated, the calibration weight parameter, and the previous state - of - charge value, so as to obtain the calibrated state - of - charge value of the battery to be calibrated.

[0155] In this optional embodiment, when the previous state - of - charge value of the battery to be calibrated is the state - of - charge value corresponding to the battery to be calibrated at the initial moment, the previous state - of - charge value of the battery to be calibrated is determined based on the average voltage value of the battery to be calibrated.

[0156] Furthermore, the calibrated state - of - charge value of the battery to be calibrated is:

[0157] SOC cor =W*SOC present +(1 - W)*SOC previous ;

[0158] Where, W is the calibration weight parameter of the battery to be calibrated, SOC presentis the current state of charge value of the battery to be calibrated, SOC previous is the previous state of charge value of the battery to be calibrated.

[0159] It can be seen that implementing Figure 3 the described adaptive calibration device for the state of charge of the battery can determine the corresponding open circuit voltage - state of charge relationship table through the current charge - discharge mode and the calibrated open circuit voltage of the battery to be calibrated, and then obtain the current state of charge value of the battery to be calibrated. Based on the calibration weight parameter of the battery to be calibrated, the current state of charge value of the battery to be calibrated is calibrated. In this way, the influence of the current and previous state of charge values of the battery to be calibrated is balanced by the calibration weight parameter, improving the calibration flexibility and accuracy of the battery to be calibrated, and further improving the calibration applicability of the battery to be calibrated under different working conditions, thereby improving the calibration convenience and practicality of the battery to be calibrated.

[0160] Embodiment 4

[0161] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of another adaptive calibration device for the state of charge of the battery disclosed in the embodiments of the present application. As Figure 4 shown, the adaptive calibration device for the state of charge of the battery may include:

[0162] a memory 401 storing executable program code;

[0163] a processor 402 coupled to the memory 401;

[0164] The processor 402 calls the executable program code stored in the memory 401 and executes the steps in the adaptive calibration method for the state of charge of the battery described in Embodiment 1 or Embodiment 2 of the present application.

[0165] Embodiment 5

[0166] The embodiments of the present application disclose a computer storage medium. The computer storage medium stores computer instructions, which are used to execute the steps in the adaptive calibration method for the state of charge of the battery described in Embodiment 1 or Embodiment 2 of the present application when the computer instructions are called.

[0167] Embodiment 6

[0168] The embodiments of the present application disclose a computer program product. The computer program product includes a non - transitory computer - readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the steps in the adaptive calibration method for the state of charge of the battery described in Embodiment 1 or Embodiment 2.

[0169] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative work.

[0170] Through the above specific description of the embodiments, those skilled in the art can clearly understand that each implementation manner can be realized by means of software plus a necessary general hardware platform, and of course, it can also be realized by hardware. Based on this understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, and the storage medium includes read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc memories, magnetic disk memories, tape memories, or any other computer-readable medium capable of carrying or storing data.

[0171] Finally, it should be noted that: what is disclosed in an adaptive calibration method and device for the state of charge of a battery according to an embodiment of the present application is only a preferred embodiment of the present application, and is only used to illustrate the technical solution of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for adaptively calibrating a battery state of charge, characterized in that: The method comprises: Acquiring a target cumulative capacity parameter of the battery to be calibrated, and judging whether the battery to be calibrated meets a preset charge and discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated; When it is determined that the battery to be calibrated meets the charge and discharge mode confirmation condition, determining a current charge and discharge mode of the battery to be calibrated according to a target cumulative capacity parameter of the battery to be calibrated; Based on the current charge and discharge mode of the battery to be calibrated, determining a current value of an operating current of the battery to be calibrated in the current charge and discharge mode and a duration of the operating current; A target state of charge calibration operation is performed on the battery to be calibrated according to the current value of the working current of the battery to be calibrated and the duration of the working current to obtain a calibrated state of charge value of the battery to be calibrated.

2. The method for adaptively calibrating the battery state of charge according to claim 1, characterized in that: The target cumulative capacity parameter of the battery to be calibrated includes a cumulative discharge capacity parameter and a cumulative charge capacity parameter of the battery to be calibrated; The step of judging whether the battery to be calibrated satisfies a preset charge and discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated includes: Calculating the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter according to the cumulative discharge capacity parameter and the cumulative charge capacity parameter of the battery to be calibrated, and determining whether the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than a preset first rated capacity parameter of the battery to be calibrated; When it is determined that the sum of the cumulative discharge capacity parameter and the cumulative charge capacity parameter is greater than the target rated capacity parameter of the battery to be calibrated, determining the maximum cumulative capacity parameter of the battery to be calibrated from the cumulative discharge capacity parameter and the cumulative charge capacity parameter, and determining whether the maximum cumulative capacity parameter of the battery to be calibrated is greater than a preset second rated capacity parameter of the battery to be calibrated; When the judgment result is yes, determining that the battery to be calibrated meets a preset charge and discharge mode confirmation condition; When the judgment result is no, it is determined that the battery to be calibrated does not meet the charge and discharge mode confirmation condition.

3. The method for adaptively calibrating the battery state of charge according to claim 2, characterized in that: The method further comprises: When it is determined that the battery to be calibrated does not meet the charge and discharge mode confirmation condition, the target cumulative capacity parameter of the battery to be calibrated is cleared, and the operation of obtaining the target cumulative capacity parameter of the battery to be calibrated is re-triggered, and judging whether the battery to be calibrated meets the preset charge and discharge mode confirmation condition according to the target cumulative capacity parameter of the battery to be calibrated is determined.

4. The method for adaptively calibrating the battery state of charge according to any one of claims 1 to 3, characterized in that: The step of performing a target state of charge calibration operation on the battery to be calibrated based on the current value of the working current of the battery to be calibrated and the duration of the working current to obtain a calibrated state of charge value of the battery to be calibrated includes: Determining whether a current value of the working current of the battery to be calibrated is less than a preset current threshold; When it is determined that the current value of the working current is greater than or equal to the current threshold, a state of charge calibration operation is performed on the battery to be calibrated by an ampere-hour integration method to obtain a calibrated state of charge value of the battery to be calibrated; When it is determined that the current value of the working current is less than the current threshold, determining whether the duration of the working current is greater than or equal to a preset duration threshold; When it is determined that the duration of the working current is less than the duration threshold, a state of charge calibration operation is performed on the battery to be calibrated by the ampere-hour integration method to obtain a calibrated state of charge value of the battery to be calibrated.

5. The method for adaptively calibrating the battery state of charge according to claim 4, characterized in that: The method further comprises: When it is determined that the duration of the working current is greater than or equal to the duration threshold, a calibration operation is performed on the current open circuit voltage of the battery to be calibrated to obtain a calibrated open circuit voltage of the battery to be calibrated; According to the current charge and discharge mode of the battery to be calibrated and the calibrated open circuit voltage of the battery to be calibrated, a state of charge calibration operation is performed on the battery to be calibrated to obtain a calibrated state of charge value of the battery to be calibrated.

6. The method for adaptively calibrating the battery state of charge according to claim 5, characterized in that: The step of performing a state of charge calibration operation on the battery to be calibrated according to the current charge and discharge mode of the battery to be calibrated and the open circuit voltage of the battery to be calibrated after calibration to obtain the state of charge value of the battery to be calibrated after calibration includes: Determine, according to the current charge and discharge mode of the battery to be calibrated, an open circuit voltage-state of charge relationship table under the current charge and discharge mode; Determine the current state of charge value of the battery to be calibrated according to the open circuit voltage-state of charge relationship table under the current charge and discharge mode and the calibrated open circuit voltage of the battery to be calibrated; Determining a target slope parameter of the battery to be calibrated as a calibration weight parameter of the battery to be calibrated according to a current state of charge value of the battery to be calibrated and a calibrated open circuit voltage of the battery to be calibrated; A previous state of charge value corresponding to the battery to be calibrated at a previous moment is obtained, and a state of charge calibration operation is performed on the battery to be calibrated according to the current state of charge value of the battery to be calibrated, the calibration weight parameter, and the previous state of charge value to obtain a calibrated state of charge value of the battery to be calibrated.

7. The method for adaptively calibrating the battery state of charge according to any one of claim 6, characterized in that: The state of charge value of the battery to be calibrated after calibration is: SOC cor =W*SOC present +(1-W)*SOC previous ; Wherein, W is the calibration weight parameter of the battery to be calibrated, SOC present is the current state of charge value of the battery to be calibrated, SOC previous is the previous state of charge value of the battery to be calibrated.

8. The method for adaptively calibrating the battery state of charge according to claim 7, characterized in that: When the previous state of charge value of the battery to be calibrated is the state of charge value corresponding to the battery to be calibrated at an initial moment, the previous state of charge value of the battery to be calibrated is determined based on an average voltage value of the battery to be calibrated.

9. An adaptive calibration device for battery state of charge, characterized in that: The device comprises: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the adaptive calibration method for the battery state of charge as described in any one of claims 1-8.

10. A computer storage medium, characterized in that: The computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the adaptive calibration method of the battery state of charge as described in any one of claims 1-8.

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