SOC correction method and device of battery, and computer storage medium

Abstract

The invention relates to the technical field of batteries, and discloses a battery SOC correction method and device, and a computer storage medium, and the method comprises the steps: obtaining an operation condition segment of a battery under a preset condition and a table display SOC of a corresponding moment from a battery database according to the battery information, determining an SOC correction point of the operation condition segment, determining a fitting formula, and obtaining the SOC correction point of the battery according to the fitting formula; the current SOH of the SOC correction point is obtained from the SOH database, the first mark SOC of the SOC correction point is calculated according to the fitting formula and the current SOH, the SOC consistency difference of the battery is obtained from the SOC consistency database, the real SOC of the battery is calculated according to the first mark SOC and the SOC consistency difference, and the table display SOC is corrected according to the real SOC. Therefore, by implementing the method, the SOC estimation precision of the battery can be improved, the SOC of the battery can be corrected in complex scenes such as slow charging or discharging, the situation that the battery has a safety problem due to inaccurate SOC estimation of the battery is reduced, the use safety of the battery is improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery SOC correction method and device, and a computer storage medium. Background Art

[0002] With the rapid development of battery technology, batteries are gradually widely used in automobiles, electronic mobile devices and other fields. However, due to the continuous recycling of batteries, irreversible physical or chemical changes will occur inside the batteries, causing battery aging. The state of charge (SOC) of the battery can reflect the degree of battery aging, but due to the complex chemical reactions inside the battery, it is difficult to effectively establish an effective estimation model for the battery SOC through electrochemical modeling.

[0003] At present, the industry usually collects battery current, voltage, temperature and other data based on the Internet of Things technology, and then uses the open circuit voltage method and ampere-hour integration method to estimate and correct the battery SOC based on these data. However, the voltage curve of some batteries (such as lithium iron phosphate batteries) has a voltage platform segment. There is no good linear mapping relationship between the battery voltage, OVC (Open Circuit Voltage) and SOC in the voltage platform segment, resulting in a large SOC estimation error during the voltage platform period, and it is also impossible to correct the SOC. Therefore, it is particularly important to propose a technical solution that can improve the SOC estimation accuracy of the battery and can correct the battery SOC in complex scenarios. Summary of the invention

[0004] The present invention provides a battery SOC correction method and device, and a computer storage medium, which can help improve the SOC estimation accuracy of the battery and can correct the battery SOC in complex scenarios.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses a battery SOC correction method, the method comprising:

[0006] According to the battery information of the battery, an operating condition segment of the battery under preset conditions and a displayed SOC at a corresponding moment are obtained from a preset battery database, wherein the operating condition segment includes a slow charging segment or a discharging segment;

[0007] Determining an SOC correction point corresponding to the operating condition segment, and determining a fitting formula corresponding to the SOC correction point;

[0008] Acquire a current SOH corresponding to the SOC correction point in a preset SOH database, and calculate a first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH;

[0009] Acquire the SOC consistency difference corresponding to the battery in a preset SOC consistency database, and calculate the real SOC of the battery according to the first marked SOC and the SOC consistency difference;

[0010] The displayed SOC is corrected according to the actual SOC.

[0011] As an optional implementation manner, in the first aspect of the present invention, calculating the true SOC of the battery according to the first marked SOC and the SOC consistency difference includes:

[0012] Determine a second marked SOC calculation formula corresponding to the operating condition segment;

[0013] Calculating a second marked SOC corresponding to the SOC correction point according to the first marked SOC, the SOC consistency difference and the second marked SOC calculation formula;

[0014] The real SOC of the battery is calculated according to the first marked SOC and the second marked SOC.

[0015] As an optional implementation, in the first aspect of the present invention, the first marked SOC includes the minimum marked SOC corresponding to the operating condition segment, and the second marked SOC includes the maximum marked SOC corresponding to the operating condition segment;

[0016] The second marking SOC calculation formula includes:

[0017] max_SOC=min_SOC+ΔSOC

[0018] Wherein, min_SOC represents the minimum marked SOC, max_SOC represents the maximum marked SOC, and ΔSOC represents the SOC consistency difference.

[0019] As an optional implementation, in the first aspect of the present invention, calculating the real SOC of the battery according to the first marked SOC and the second marked SOC includes:

[0020] Calculating the real SOC of the battery according to the first marked SOC, the second marked SOC and a preset real SOC calculation formula;

[0021] The actual SOC calculation formula includes:

[0022]

[0023] Among them, real_SOC represents the real SOC, min_SOC represents the first marked SOC, and max_SOC represents the second marked SOC.

[0024] As an optional implementation manner, in the first aspect of the present invention, determining the SOC correction point corresponding to the operating condition segment includes:

[0025] Acquire a target curve set corresponding to the operating condition segment in the battery database, the target curve set comprising an ampere-hour integrated capacity-voltage curve set and a pressure difference change curve;

[0026] When the operating condition segment includes the slow charging segment, the set of ampere-hour integrated capacity-voltage curves is analyzed to obtain at least one voltage platform, and a target voltage platform is determined in each of the voltage platforms, or the pressure difference change curve is analyzed to obtain a first pressure difference feature;

[0027] Determine the starting point of the target voltage platform as the SOC correction point corresponding to the operating condition segment, or determine the SOC correction point corresponding to the operating condition segment according to the first pressure difference characteristic;

[0028] When the operating condition segment includes the discharging segment, the pressure difference variation curve is analyzed to obtain a second pressure difference characteristic, and the SOC correction point corresponding to the operating condition segment is determined according to the second pressure difference characteristic.

[0029] As an optional implementation, in the first aspect of the present invention, the ampere-hour integrated capacity-voltage curve set includes at least one ampere-hour integrated capacity-voltage curve;

[0030] The determining of the fitting formula corresponding to the SOC correction point includes:

[0031] For each of the ampere-hour integrated capacity-voltage curves, determining a target starting point of a target voltage platform corresponding to the ampere-hour integrated capacity-voltage curve;

[0032] The target starting point of each of the ampere-hour integrated capacity-voltage curves is fitted to obtain a fitting formula corresponding to the SOC correction point.

[0033] As an optional implementation, in the first aspect of the present invention, the correcting the displayed SOC according to the real SOC includes:

[0034] Determine whether the real SOC is equal to the displayed SOC, and obtain a determination result;

[0035] When the judgment result indicates that the real SOC is equal to the displayed SOC, the displayed SOC is not corrected;

[0036] When the judgment result indicates that the real SOC is not equal to the displayed SOC, the displayed SOC is corrected by a preset correction method.

[0037] As an optional implementation, in the first aspect of the present invention, when the judgment result indicates that the real SOC is not equal to the displayed SOC, the preset correction method includes an SOC following correction method.

[0038] A second aspect of the present invention discloses a battery SOC correction device, the device comprising:

[0039] An acquisition module, configured to acquire, from a preset battery database, an operating condition segment of the battery under preset conditions and a displayed SOC at a corresponding moment according to battery information of the battery, wherein the operating condition segment includes a slow charging segment or a discharging segment;

[0040] A determination module, used to determine the SOC correction point corresponding to the operating condition segment, and determine a fitting formula corresponding to the SOC correction point;

[0041] The acquisition module is further used to acquire the current SOH corresponding to the SOC correction point in a preset SOH database, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH;

[0042] The acquisition module is further used to acquire the SOC consistency difference corresponding to the battery in a preset SOC consistency database;

[0043] a calculation module, configured to calculate a real SOC of the battery according to the first marked SOC and the SOC consistency difference;

[0044] A correction module is used to correct the displayed SOC according to the real SOC.

[0045] As an optional implementation, in the second aspect of the present invention, the calculation module calculates the actual SOC of the battery according to the first marked SOC and the SOC consistency difference, specifically including:

[0046] Determine a second marked SOC calculation formula corresponding to the operating condition segment;

[0047] Calculating a second marked SOC corresponding to the SOC correction point according to the first marked SOC, the SOC consistency difference and the second marked SOC calculation formula;

[0048] The real SOC of the battery is calculated according to the first marked SOC and the second marked SOC.

[0049] As an optional implementation, in the second aspect of the present invention, the first marked SOC includes the minimum marked SOC corresponding to the operating condition segment, and the second marked SOC includes the maximum marked SOC corresponding to the operating condition segment;

[0050] The second marking SOC calculation formula includes:

[0051] max_SOC=min_SOC+ΔSOC

[0052] Wherein, min_SOC represents the minimum marked SOC, max_SOC represents the maximum marked SOC, and ΔSOC represents the SOC consistency difference.

[0053] As an optional implementation, in the second aspect of the present invention, the calculation module calculates the actual SOC of the battery according to the first marked SOC and the second marked SOC, specifically including:

[0054] Calculating the real SOC of the battery according to the first marked SOC, the second marked SOC and a preset real SOC calculation formula;

[0055] The actual SOC calculation formula includes:

[0056]

[0057] Among them, real_SOC represents the real SOC, min_SOC represents the first marked SOC, and max_SOC represents the second marked SOC.

[0058] As an optional implementation, in the second aspect of the present invention, the manner in which the determination module determines the SOC correction point corresponding to the operating condition segment specifically includes:

[0059] Acquire a target curve set corresponding to the operating condition segment in the battery database, the target curve set comprising an ampere-hour integrated capacity-voltage curve set and a pressure difference change curve;

[0060] When the operating condition segment includes the slow charging segment, the set of ampere-hour integrated capacity-voltage curves is analyzed to obtain at least one voltage platform, and a target voltage platform is determined in each of the voltage platforms, or the pressure difference change curve is analyzed to obtain a first pressure difference feature;

[0061] Determine the starting point of the target voltage platform as the SOC correction point corresponding to the operating condition segment, or determine the SOC correction point corresponding to the operating condition segment according to the first pressure difference characteristic;

[0062] When the operating condition segment includes the discharging segment, the pressure difference variation curve is analyzed to obtain a second pressure difference characteristic, and the SOC correction point corresponding to the operating condition segment is determined according to the second pressure difference characteristic.

[0063] As an optional implementation, in the second aspect of the present invention, the ampere-hour integrated capacity-voltage curve set includes at least one ampere-hour integrated capacity-voltage curve;

[0064] The manner in which the determination module determines the fitting formula corresponding to the SOC correction point specifically includes:

[0065] For each of the ampere-hour integrated capacity-voltage curves, determining a target starting point of a target voltage platform corresponding to the ampere-hour integrated capacity-voltage curve;

[0066] The target starting point of each of the ampere-hour integrated capacity-voltage curves is fitted to obtain a fitting formula corresponding to the SOC correction point.

[0067] As an optional implementation, in the second aspect of the present invention, the correction module corrects the displayed SOC according to the real SOC in a manner that specifically includes:

[0068] Determine whether the real SOC is equal to the displayed SOC, and obtain a determination result;

[0069] When the judgment result indicates that the real SOC is equal to the displayed SOC, the displayed SOC is not corrected;

[0070] When the judgment result indicates that the real SOC is not equal to the displayed SOC, the displayed SOC is corrected by a preset correction method.

[0071] As an optional implementation, in the second aspect of the present invention, when the judgment result indicates that the real SOC is not equal to the displayed SOC, the preset correction method includes an SOC following correction method.

[0072] The third aspect of the present invention discloses another SOC correction device for a battery, the device comprising:

[0073] A memory storing executable program code;

[0074] a processor coupled to the memory;

[0075] The processor calls the executable program code stored in the memory to execute the battery SOC correction method disclosed in the first aspect of the present invention.

[0076] A fourth aspect of the present invention discloses a computer storage medium, wherein the computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the battery SOC correction method disclosed in the first aspect of the present invention.

[0077] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0078] In an embodiment of the present invention, based on the battery information of the battery, the operating condition fragment of the battery under preset conditions and the displayed SOC at the corresponding moment are obtained from a preset battery database, the SOC correction point corresponding to the operating condition fragment is determined, and the fitting formula corresponding to the SOC correction point is determined, the current SOH corresponding to the SOC correction point is obtained in the preset SOH database, and the first marked SOC corresponding to the SOC correction point is calculated according to the fitting formula and the current SOH, the SOC consistency difference corresponding to the battery is obtained in the preset SOC consistency database, and the real SOC of the battery is calculated according to the first marked SOC and the SOC consistency difference, and the displayed SOC is corrected according to the real SOC. It can be seen that the implementation of the present invention can improve the SOC estimation accuracy of the battery, and can correct the battery SOC in complex scenarios such as slow charging or discharging, reduce the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improve battery safety and extend battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0080] Figure 1 It is a flow chart of a battery SOC correction method disclosed in an embodiment of the present invention;

[0081] Figure 2 It is a schematic diagram of a set of SOC-voltage curves of a slow charging segment of a lithium iron phosphate battery under different SOH states disclosed in an embodiment of the present invention;

[0082] Figure 3 is a schematic diagram of a target curve set of a lithium iron phosphate battery disclosed in an embodiment of the present invention;

[0083] Figure 4It is a schematic diagram of a fitting curve of a slow charging segment of a lithium iron phosphate battery disclosed in an embodiment of the present invention;

[0084] Figure 5 It is a flow chart of another battery SOC correction method disclosed in an embodiment of the present invention;

[0085] Figure 6 It is a structural schematic diagram of a battery SOC correction device disclosed in an embodiment of the present invention;

[0086] Figure 7 It is a structural schematic diagram of another battery SOC correction device disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0087] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0088] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0089] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0090] The present invention discloses a battery SOC correction method and device, and a computer storage medium, which can improve the SOC estimation accuracy of the battery, and can correct the battery SOC in complex scenarios such as slow charging or discharging, reduce the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improve battery safety and extend battery life. The following are detailed descriptions.

[0091] Embodiment 1

[0092] See also Figure 1 , Figure 1 : is a flow chart of a battery SOC correction method disclosed in an embodiment of the present invention. Figure 1 The battery SOC correction method described above can be applied to a battery SOC correction device, wherein the battery SOC correction device may include an intelligent server or an intelligent platform, and the intelligent server includes a local server or a cloud server, which is not limited in the embodiment of the present invention. Figure 1 As shown, the battery SOC correction method may include the following operations:

[0093] 101. According to the battery information of the battery, obtain the operating condition fragment of the battery under preset conditions and the displayed SOC at the corresponding time from a preset battery database.

[0094] In an embodiment of the present invention, optionally, the battery may include a lithium-ion battery or a lithium iron phosphate battery. The battery may be a power battery of the vehicle or a storage battery. The battery information of the battery may include a battery identification. The battery identification may include an identification of the battery itself or an identification of the battery system, such as a battery system ID. The battery information may also include a current evaluation date, which is not limited by the present invention.

[0095] In an embodiment of the present invention, optionally, a preset battery database stores operation record information of the battery under all operating conditions, and an operating condition segment of the battery under preset conditions can be obtained from the preset battery database. The preset conditions may include the displayed SOC range conditions of the battery system, for example, an operating condition segment of the battery system with an displayed SOC in the range of 40%-90% is obtained, and the operating condition segment may include a slow charging segment or a discharging segment. Specifically, data in the battery database can be obtained and sliced ​​to obtain a charging segment and a discharging segment of the battery. The charging segment may include one or more combinations of a fast charging segment, a slow charging segment, and a super charging segment, and a slow charging segment or a discharging segment is screened from these segments, wherein the rate of the slow charging segment is less than 0.3C, and the slow charging segment can meet the constant current or constant power conditions, which is not limited by the present invention.

[0096] 102. Determine the SOC correction point corresponding to the operating condition segment, and determine the fitting formula corresponding to the SOC correction point.

[0097] In an embodiment of the present invention, optionally, the difference between the maximum voltage and the minimum voltage at each moment can be calculated in the operating condition segment, and a pressure difference curve can be constructed by the difference between the maximum voltage and the minimum voltage at each moment, and the SOC correction point can be found based on the pressure difference characteristics in the pressure difference curve, which is not limited by the present invention.

[0098] 103. Obtain a current SOH corresponding to the SOC correction point in a preset SOH database, and calculate a first marked SOC corresponding to the SOC correction point according to a fitting formula and the current SOH.

[0099] In an embodiment of the present invention, optionally, the SOH database stores the SOH under all operating conditions of the battery. Optionally, the SOH database may be a sub-database under the battery database or a database independent of the battery database, which is not limited in the present invention.

[0100] In an embodiment of the present invention, optionally, the first marked SOC corresponds to the SOC correction point, indicating the minimum marked SOC of the operating condition segment. The minimum marked SOC corresponding to the SOC correction point can be calculated according to the fitting formula corresponding to the SOC correction point and the current SOH. The fitting formula may include: min_SOC = f(SOH).

[0101] 104. Obtain the SOC consistency difference corresponding to the battery in a preset SOC consistency database, and calculate the real SOC of the battery according to the first marked SOC and the SOC consistency difference.

[0102] In an embodiment of the present invention, optionally, a preset SOC consistency database stores SOC consistency difference information of the battery. The preset SOC consistency database may be a sub-database under the battery database or a database independent of the battery database, which is not limited by the present invention.

[0103] 105. Correct the displayed SOC according to the actual SOC.

[0104] It can be seen that implementation Figure 1 The described battery SOC correction method can obtain, according to the battery information of the battery, the operating condition fragment of the battery under preset conditions and the displayed SOC at the corresponding moment from a preset battery database, determine the SOC correction point corresponding to the operating condition fragment, and determine the fitting formula corresponding to the SOC correction point, obtain the current SOH corresponding to the SOC correction point in the preset SOH database, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH, obtain the SOC consistency difference corresponding to the battery in the preset SOC consistency database, and calculate the real SOC of the battery according to the first marked SOC and the SOC consistency difference, and correct the displayed SOC according to the real SOC, so as to improve the SOC estimation accuracy of the battery, and can correct the battery SOC in complex scenarios such as slow charging or discharging, reduce the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improve battery safety and extend battery service life.

[0105] In an optional embodiment, determining the SOC correction point corresponding to the operating condition segment includes:

[0106] Obtaining a target curve set corresponding to the operating condition segment in the battery database, the target curve set including an ampere-hour integrated capacity-voltage curve set and a pressure difference change curve;

[0107] When the operating condition segment includes a slow charging segment, the ampere-hour integrated capacity-voltage curve set is analyzed to obtain at least one voltage platform, and a target voltage platform is determined in each voltage platform, or the pressure difference change curve is analyzed to obtain a first pressure difference feature;

[0108] Determine the starting point of the target voltage platform as the SOC correction point corresponding to the operating condition segment, or determine the SOC correction point corresponding to the operating condition segment according to the first pressure difference characteristic;

[0109] When the operating condition segment includes a discharge segment, the pressure difference variation curve is analyzed to obtain a second pressure difference characteristic, and the SOC correction point corresponding to the operating condition segment is determined according to the second pressure difference characteristic.

[0110] In this optional embodiment, optionally, a target curve set corresponding to the operating condition segment can be obtained in the battery database, and the target curve set can include an ampere-hour integral capacity-voltage curve set and a pressure difference change curve, wherein the ampere-hour integral capacity-voltage curve set can include multiple ampere-hour integral capacity-voltage curves under different SOHs. Taking lithium iron phosphate batteries as an example, Figure 2 As shown, Figure 2 is a schematic diagram of a set of SOC-voltage curves of a slow-charge segment of a lithium iron phosphate battery under different SOH states disclosed in an embodiment of the present invention, such as Figure 2 As shown in the figure, the figure includes multiple ampere-hour integrated capacity-voltage curves (SOC-voltage curves), each of which represents the ampere-hour integrated capacity-voltage curve under a specific SOH; the pressure difference change curve represents the difference change curve between the maximum voltage and the minimum voltage at each moment in the operating condition segment. Taking lithium iron phosphate battery as an example, Figure 3 As shown, Figure 3 is a schematic diagram of a target curve set of a lithium iron phosphate battery disclosed in an embodiment of the present invention, specifically, Figure 3 As shown, Figure 3 The upper part is a schematic diagram of the ampere-hour integrated capacity-voltage curve set, with the horizontal axis being the ampere-hour integrated capacity. Figure 3 The lower part is a schematic diagram of a voltage variation curve, and the horizontal axis is time, which is not limited in this embodiment.

[0111] In this optional embodiment, optionally, as Figure 2As shown, when the operating condition segment includes a slow charging segment, the ampere-hour integrated capacity-voltage curve set can be analyzed to obtain at least one voltage platform, and a target voltage platform is determined in each voltage platform. Specifically, Figure 2 or Figure 3 The general trend of each ampere-hour integrated capacity-voltage curve in the upper part is similar. As the voltage increases, three voltage platforms appear in sequence, namely the first platform, the second platform and the third platform. In this embodiment, the third platform can be determined as the target voltage platform, and the starting point of the third platform can be determined as the SOC correction point corresponding to the operating condition segment. Specifically, it can be determined Figure 2 Point A or Figure 3 Point C in is the SOC correction point corresponding to the slow charging segment; or, Figure 3 As shown, the voltage change curve can be analyzed to obtain a first pressure difference characteristic. Specifically, the first pressure difference characteristic can be Figure 3 The pressure difference arch area characteristics of the slow charging segment shown in the lower part, according to the first pressure difference characteristics, determine the SOC correction point corresponding to the target operating condition segment. Specifically, it can be determined Figure 3 Point D in is the SOC correction point corresponding to the slow charging segment, which is not limited in this embodiment.

[0112] In this optional embodiment, optionally, as Figure 3 As shown, when the target operating condition segment includes a discharge segment, the pressure difference change curve can be analyzed to obtain a second pressure difference characteristic, and the SOC correction point corresponding to the operating condition segment can be determined according to the second pressure difference characteristic. Specifically, Figure 3 Point E in FIG. 1 is the SOC correction point corresponding to the slow charging segment, which is not limited in this embodiment.

[0113] It can be seen that implementing this optional embodiment can obtain a target curve set corresponding to an operating condition segment in a battery database. When the operating condition segment includes a slow charging segment, the ampere-hour integrated capacity-voltage curve set is analyzed to obtain at least one voltage platform, and a target voltage platform is determined in each voltage platform. Alternatively, the pressure difference change curve is analyzed to obtain a first pressure difference characteristic, and a starting point of the target voltage platform is determined as the SOC correction point corresponding to the operating condition segment. Alternatively, the SOC correction point corresponding to the operating condition segment is determined according to the first pressure difference characteristic. When the operating condition segment includes a discharge segment, the pressure difference change curve is analyzed to obtain a second pressure difference characteristic, and the SOC correction point corresponding to the operating condition segment is determined according to the second pressure difference characteristic, thereby improving the accuracy of determining the SOC correction point of the battery under the operating condition segment, and thereby improving the accuracy of determining the true SOC of the battery.

[0114] In another optional embodiment, the ampere-hour integrated capacity-voltage curve set includes at least one ampere-hour integrated capacity-voltage curve;

[0115] Determine the fitting formula corresponding to the SOC correction point, including:

[0116] For each ampere-hour integrated capacity-voltage curve, determining a target starting point of a target voltage platform corresponding to the ampere-hour integrated capacity-voltage curve;

[0117] The target starting point of each ampere-hour integrated capacity-voltage curve is fitted to obtain the fitting formula corresponding to the SOC correction point.

[0118] In this optional embodiment, optionally, a target starting point of a target voltage platform corresponding to each ampere-hour integrated capacity-voltage curve may be determined, specifically, Figure 2 As shown, Figure 2 Point A and point B in the graph represent the target starting points of the target voltage platform corresponding to two different ampere-hour integrated capacity-voltage curves, where SOH=103.3% at point A, SOC=62.6% at the SOC correction point, and SOH=90.7% at point B, SOC=71.8% at the SOC correction point. That is, the target starting point of each ampere-hour integrated capacity-voltage curve can be fitted to obtain the fitting formula corresponding to the SOC correction point, such as Figure 4 As shown, Figure 4 It is a schematic diagram of a fitting curve of a slow charging segment of a lithium iron phosphate battery disclosed in an embodiment of the present invention. The corresponding fitting formula in the figure is y=-0.7252x+1.3752, which is not limited in this embodiment.

[0119] It can be seen that the implementation of this optional embodiment can determine the target starting point of the target voltage platform corresponding to each ampere-hour integrated capacity-voltage curve, fit the target starting point of each ampere-hour integrated capacity-voltage curve, and obtain the fitting formula corresponding to the SOC correction point, thereby improving the accuracy of calculating the marked SOC of the battery through the fitting formula, and further improving the accuracy of determining the true SOC of the battery.

[0120] In yet another optional embodiment, the displayed SOC is corrected according to the actual SOC, including:

[0121] Determine whether the real SOC is equal to the displayed SOC and obtain the determination result;

[0122] When the judgment result indicates that the real SOC is equal to the displayed SOC, the displayed SOC is not corrected;

[0123] When the judgment result indicates that the actual SOC is not equal to the displayed SOC, the displayed SOC is corrected by a preset correction method.

[0124] In this optional embodiment, it is optional to determine whether the real SOC is equal to the displayed SOC. When the determination result indicates that the real SOC is equal to the displayed SOC, the displayed SOC is not corrected. When the determination result indicates that the real SOC is not equal to the displayed SOC, the displayed SOC is corrected by a preset correction method, which is not limited in this embodiment.

[0125] In this optional embodiment, optionally, when the judgment result indicates that the actual SOC is not equal to the displayed SOC, the preset correction method includes an SOC following correction method; specifically, the SOC following correction method can be used to adjust or follow the SOC value of the battery according to the real-time status of the battery. For example, in the slow charging segment, if the displayed SOC value is higher than the actual value, a deceleration correction may be performed (i.e., reducing the value of the correction coefficient k), otherwise an acceleration correction may be performed (i.e., increasing the value of k). Similarly, in the discharge segment, corresponding corrections will be made based on the comparison between the displayed value and the actual value, which is not limited in this embodiment.

[0126] It can be seen that the implementation of this optional embodiment can correct the battery SOC based on the difference between the actual SOC and the displayed SOC, and correct the battery SOC by SOC following, thereby improving the accuracy and reliability of the battery SOC correction, and can correct the battery SOC in complex scenarios such as slow charging or discharging, thereby reducing the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improving battery safety and extending battery life.

[0127] Embodiment 2

[0128] See also Figure 5 , Figure 5 : is a flow chart of a battery SOC correction method disclosed in an embodiment of the present invention. Figure 5 The battery SOC correction method described above can be applied to a battery SOC correction device, wherein the battery SOC correction device may include an intelligent server or an intelligent platform, and the intelligent server includes a local server or a cloud server, which is not limited in the embodiment of the present invention. Figure 5 As shown, the battery SOC correction method may include the following operations:

[0129] 201. According to the battery information of the battery, obtain the operating condition fragment of the battery under preset conditions and the displayed SOC at the corresponding time from a preset battery database.

[0130] 202. Determine an SOC correction point corresponding to the operating condition segment, and determine a fitting formula corresponding to the SOC correction point.

[0131] 203. Obtain a current SOH corresponding to the SOC correction point in a preset SOH database, and calculate a first marked SOC corresponding to the SOC correction point according to a fitting formula and the current SOH.

[0132] 204. Obtain the SOC consistency difference corresponding to the battery in a preset SOC consistency database.

[0133] 205. Determine a second marked SOC calculation formula corresponding to the operating condition segment.

[0134] 206. Calculate a second marked SOC corresponding to the SOC correction point according to the first marked SOC, the SOC consistency difference, and a second marked SOC calculation formula.

[0135] In the embodiment of the present invention, optionally, the second marked SOC corresponding to the SOC correction point may include the maximum marked SOC corresponding to the operating condition segment, which is not limited in the present invention.

[0136] 207. Calculate the actual SOC of the battery according to the first marked SOC and the second marked SOC.

[0137] 208. Correct the displayed SOC according to the actual SOC.

[0138] In the embodiment of the present invention, for other descriptions of step 201 to step 204 and step 208, please refer to the detailed description of step 101 to step 104 in the first embodiment of the present invention, and the embodiment of the present invention will not be repeated.

[0139] It can be seen that the implementation Figure 5The described battery SOC correction method can obtain, according to the battery information of the battery, an operating condition segment of the battery under preset conditions and the displayed SOC at the corresponding moment from a preset battery database, determine the SOC correction point corresponding to the operating condition segment, and determine the fitting formula corresponding to the SOC correction point, obtain the current SOH corresponding to the SOC correction point in a preset SOH database, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH, obtain the SOC consistency difference corresponding to the battery in a preset SOC consistency database, determine the second marked SOC calculation formula corresponding to the operating condition segment, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH, obtain the SOC consistency difference corresponding to the battery in a preset SOC consistency database, determine the second marked SOC calculation formula corresponding to the operating condition segment, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH. The first-marked SOC, SOC consistency difference and the second-marked SOC calculation formula are used to calculate the second-marked SOC corresponding to the SOC correction point. According to the first-marked SOC and the second-marked SOC, the real SOC of the battery is calculated to improve the accuracy of calculating the real SOC of the battery, thereby improving the accuracy of correcting the battery SOC. The displayed SOC is corrected according to the real SOC, which can improve the SOC estimation accuracy of the battery, and can correct the battery SOC in complex scenarios such as slow charging or discharging, reduce the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improve battery safety and extend battery life.

[0140] In an optional embodiment, the first marked SOC includes a minimum marked SOC corresponding to the operating condition segment, and the second marked SOC includes a maximum marked SOC corresponding to the operating condition segment;

[0141] The second marker SOC calculation formula includes:

[0142] max_SOC=min_SOC+ΔSOC

[0143] Among them, min_SOC represents the minimum labeled SOC, max_SOC represents the maximum labeled SOC, and ΔSOC represents the SOC consistency difference.

[0144] In this optional embodiment, optionally, the first marked SOC may include a minimum marked SOC corresponding to the operating condition segment, and the second marked SOC may include a maximum marked SOC corresponding to the operating condition segment. The maximum marked SOC corresponding to the SOC correction point may be calculated according to the minimum marked SOC and the SOC consistency difference and the second marked SOC calculation formula, and the second marked SOC calculation formula includes:

[0145] max_SOC=min_SOC+ΔSOC

[0146] Wherein, min_SOC represents the minimum marked SOC, max_SOC represents the maximum marked SOC, and ΔSOC represents the SOC consistency difference, which is not limited in this embodiment.

[0147] It can be seen that the implementation of this optional embodiment can calculate the second marked SOC of the battery SOC correction point in the battery slow charging segment or discharge segment, improve the accuracy and reliability of calculating the second marked SOC, and can correct the battery SOC in complex scenarios such as slow charging or discharging, reduce the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improve battery safety and extend battery life.

[0148] In another optional embodiment, calculating the real SOC of the battery according to the first marked SOC and the second marked SOC includes:

[0149] Calculate the real SOC of the battery according to the first marked SOC, the second marked SOC and a preset real SOC calculation formula;

[0150] Among them, the real SOC calculation formula includes:

[0151]

[0152] Among them, real_SOC represents the real SOC, min_SOC represents the first marked SOC, and max_SOC represents the second marked SOC.

[0153] In this optional embodiment, optionally, the real SOC of the battery can be calculated according to the first marked SOC, the second marked SOC and a preset real SOC calculation formula, wherein the real SOC calculation formula includes:

[0154]

[0155] Specifically, min_SOC represents the first marked SOC, and max_SOC represents the second marked SOC, that is, the minimum marked SOC of the battery's operating condition segment is first calculated by the first fitting formula min_SOC=f(SOH), and then the maximum marked SOC under the slow charging segment is calculated, which is not limited in this embodiment.

[0156] It can be seen that implementing this optional embodiment can calculate the real SOC of the battery according to the first marked SOC, the second marked SOC and the preset real SOC calculation formula, thereby improving the accuracy of calculating the real SOC of the battery, and then improving the correction accuracy of the battery SOC, improving the safety of battery use and extending the battery life.

[0157] Embodiment 3

[0158] See also Figure 6 , Figure 6 1 is a schematic diagram of the structure of a battery SOC correction device disclosed in an embodiment of the present invention. Figure 6The described battery SOC correction device may include an intelligent server or an intelligent platform, and the intelligent server includes a local server or a cloud server, which is not limited in the embodiment of the present invention.

[0159] like Figure 6 As shown, the SOC correction device of the battery may include:

[0160] The acquisition module 301 is used to acquire, from a preset battery database, an operating condition segment of the battery under preset conditions and a displayed SOC at a corresponding moment according to the battery information of the battery, wherein the operating condition segment includes a slow charging segment or a discharging segment;

[0161] A determination module 302 is used to determine the SOC correction point corresponding to the operating condition segment and determine the fitting formula corresponding to the SOC correction point;

[0162] The acquisition module 301 is further used to acquire the current SOH corresponding to the SOC correction point in a preset SOH database, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH;

[0163] The acquisition module 301 is further used to acquire the SOC consistency difference corresponding to the battery in a preset SOC consistency database;

[0164] A calculation module 303, configured to calculate a real SOC of the battery according to the first marked SOC and the SOC consistency difference;

[0165] The correction module 304 is used to correct the displayed SOC according to the actual SOC.

[0166] It can be seen that implementation Figure 6 The described battery SOC correction device can obtain, according to the battery information of the battery, the operating condition fragment of the battery under preset conditions and the displayed SOC at the corresponding moment from a preset battery database, determine the SOC correction point corresponding to the operating condition fragment, and determine the fitting formula corresponding to the SOC correction point, obtain the current SOH corresponding to the SOC correction point in the preset SOH database, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH, obtain the SOC consistency difference corresponding to the battery in the preset SOC consistency database, and calculate the real SOC of the battery according to the first marked SOC and the SOC consistency difference, and correct the displayed SOC according to the real SOC, so as to improve the SOC estimation accuracy of the battery, and can correct the battery SOC in complex scenarios such as slow charging or discharging, reduce the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improve battery safety and extend battery service life.

[0167] In an optional embodiment, if Figure 6 As shown, the specific manner in which the calculation module 303 calculates the actual SOC of the battery according to the first marked SOC and the SOC consistency difference includes:

[0168] Determine a second marked SOC calculation formula corresponding to the operating condition segment;

[0169] Calculate the second marked SOC corresponding to the SOC correction point according to the first marked SOC, the SOC consistency difference and the second marked SOC calculation formula;

[0170] The real SOC of the battery is calculated according to the first marker SOC and the second marker SOC.

[0171] It can be seen that implementation Figure 6 The described battery SOC correction device can obtain, according to the battery information of the battery, an operating condition segment of the battery under preset conditions and the displayed SOC at the corresponding moment from a preset battery database, determine the SOC correction point corresponding to the operating condition segment, and determine the fitting formula corresponding to the SOC correction point, obtain the current SOH corresponding to the SOC correction point in a preset SOH database, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH, obtain the SOC consistency difference corresponding to the battery in a preset SOC consistency database, determine the second marked SOC calculation formula corresponding to the operating condition segment, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH, obtain the SOC consistency difference corresponding to the battery in a preset SOC consistency database, determine the second marked SOC calculation formula corresponding to the operating condition segment, and calculate the first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH. The first-marked SOC, SOC consistency difference and the second-marked SOC calculation formula are used to calculate the second-marked SOC corresponding to the SOC correction point. According to the first-marked SOC and the second-marked SOC, the real SOC of the battery is calculated to improve the accuracy of calculating the real SOC of the battery, thereby improving the accuracy of correcting the battery SOC. The displayed SOC is corrected according to the real SOC, which can improve the SOC estimation accuracy of the battery, and can correct the battery SOC in complex scenarios such as slow charging or discharging, reduce the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improve battery safety and extend battery life.

[0172] In another optional embodiment, Figure 6 As shown, the first marked SOC includes the minimum marked SOC corresponding to the operating condition segment, and the second marked SOC includes the maximum marked SOC corresponding to the operating condition segment;

[0173] The second marker SOC calculation formula includes:

[0174] max_SOC=min_SOC+ΔSOC

[0175] Among them, min_SOC represents the minimum labeled SOC, max_SOC represents the maximum labeled SOC, and ΔSOC represents the SOC consistency difference.

[0176] It can be seen that the implementation Figure 6 The described battery SOC correction device can calculate the second marked SOC of the battery SOC correction point in the battery slow charging segment or discharge segment, improve the accuracy and reliability of calculating the second marked SOC, and can correct the battery SOC in complex scenarios such as slow charging or discharging, reduce the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improve battery safety and extend battery life.

[0177] In yet another optional embodiment, Figure 6 As shown, the specific method in which the calculation module 303 calculates the actual SOC of the battery according to the first marked SOC and the second marked SOC includes:

[0178] Calculate the real SOC of the battery according to the first marked SOC, the second marked SOC and a preset real SOC calculation formula;

[0179] Among them, the real SOC calculation formula includes:

[0180]

[0181] Among them, real_SOC represents the real SOC, min_SOC represents the first marked SOC, and max_SOC represents the second marked SOC.

[0182] It can be seen that the implementation Figure 6 The described battery SOC correction device can calculate the real SOC of the battery according to the first marked SOC, the second marked SOC and the preset real SOC calculation formula, thereby improving the accuracy of calculating the real SOC of the battery, thereby improving the correction accuracy of the battery SOC, improving the battery safety and extending the battery life.

[0183] In yet another optional embodiment, Figure 6 As shown, the method in which the determination module 302 determines the SOC correction point corresponding to the operating condition segment specifically includes:

[0184] Obtaining a target curve set corresponding to the operating condition segment in the battery database, the target curve set including an ampere-hour integrated capacity-voltage curve set and a pressure difference change curve;

[0185] When the operating condition segment includes a slow charging segment, the ampere-hour integrated capacity-voltage curve set is analyzed to obtain at least one voltage platform, and a target voltage platform is determined in each voltage platform, or the pressure difference change curve is analyzed to obtain a first pressure difference feature;

[0186] Determine the starting point of the target voltage platform as the SOC correction point corresponding to the operating condition segment, or determine the SOC correction point corresponding to the operating condition segment according to the first pressure difference characteristic;

[0187] When the operating condition segment includes a discharge segment, the pressure difference variation curve is analyzed to obtain a second pressure difference characteristic, and the SOC correction point corresponding to the operating condition segment is determined according to the second pressure difference characteristic.

[0188] It can be seen that implementation Figure 6 The described battery SOC correction device can obtain a target curve set corresponding to an operating condition segment in a battery database. When the operating condition segment includes a slow charging segment, the ampere-hour integrated capacity-voltage curve set is analyzed to obtain at least one voltage platform, and a target voltage platform is determined in each voltage platform, or the pressure difference change curve is analyzed to obtain a first pressure difference characteristic, and a starting point of the target voltage platform is determined as the SOC correction point corresponding to the operating condition segment, or the SOC correction point corresponding to the operating condition segment is determined according to the first pressure difference characteristic. When the operating condition segment includes a discharge segment, the pressure difference change curve is analyzed to obtain a second pressure difference characteristic, and the SOC correction point corresponding to the operating condition segment is determined according to the second pressure difference characteristic, thereby improving the accuracy of determining the SOC correction point of the battery under the operating condition segment, and thereby improving the accuracy of determining the true SOC of the battery.

[0189] In yet another optional embodiment, Figure 6 As shown, the ampere-hour integrated capacity-voltage curve set includes at least one ampere-hour integrated capacity-voltage curve;

[0190] The specific manner in which the determination module 302 determines the fitting formula corresponding to the SOC correction point includes:

[0191] For each ampere-hour integrated capacity-voltage curve, determining a target starting point of a target voltage platform corresponding to the ampere-hour integrated capacity-voltage curve;

[0192] The target starting point of each ampere-hour integrated capacity-voltage curve is fitted to obtain the fitting formula corresponding to the SOC correction point.

[0193] It can be seen that implementation Figure 6 The described battery SOC correction device can determine, for each ampere-hour integrated capacity-voltage curve, a target starting point of a target voltage platform corresponding to the ampere-hour integrated capacity-voltage curve, fit the target starting point of each ampere-hour integrated capacity-voltage curve, and obtain a fitting formula corresponding to the SOC correction point, thereby improving the accuracy of calculating the marked SOC of the battery through the fitting formula, and further improving the accuracy of determining the true SOC of the battery.

[0194] In yet another optional embodiment, Figure 6 As shown, the specific manner in which the correction module 304 corrects the displayed SOC according to the actual SOC includes:

[0195] Determine whether the real SOC is equal to the displayed SOC and obtain the determination result;

[0196] When the judgment result indicates that the real SOC is equal to the displayed SOC, the displayed SOC is not corrected;

[0197] When the judgment result indicates that the actual SOC is not equal to the displayed SOC, the displayed SOC is corrected by a preset correction method;

[0198] And, when the determination result indicates that the real SOC is not equal to the displayed SOC, the preset correction method includes an SOC following correction method.

[0199] It can be seen that implementation Figure 6 The described battery SOC correction device can correct the battery SOC based on the difference between the actual SOC and the displayed SOC, and correct the battery SOC by SOC following, thereby improving the accuracy and reliability of the battery SOC correction, and can correct the battery SOC in complex scenarios such as slow charging or discharging, thereby reducing the occurrence of battery safety problems caused by inaccurate battery SOC estimation, improving battery safety and extending battery life.

[0200] Embodiment 4

[0201] See also Figure 7 , Figure 7 FIG. 1 is a schematic diagram of the structure of another battery SOC correction device disclosed in an embodiment of the present invention. Figure 7 As shown, the SOC correction device of the battery may include:

[0202] A memory 401 storing executable program codes;

[0203] a processor 402 coupled to the memory 401;

[0204] The processor 402 calls the executable program code stored in the memory 401 to execute the steps of the battery SOC correction method described in the first embodiment of the present invention or the second embodiment of the present invention.

[0205] Embodiment 5

[0206] An embodiment of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute the steps in the battery SOC correction method described in the first embodiment of the present invention or the second embodiment of the present invention.

[0207] Embodiment 6

[0208] An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a computer to execute the steps in the battery SOC correction method described in Embodiment 1 or Embodiment 2.

[0209] The device embodiments described above are only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0210] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or partly contributed to the prior art in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0211] Finally, it should be noted that the SOC correction method and device for a battery, and the computer storage medium disclosed in the embodiments of the present invention are only preferred embodiments of the present invention, and are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery SOC correction method, characterized in that: The method comprises: According to the battery information of the battery, an operating condition segment of the battery under preset conditions and a displayed SOC at a corresponding moment are obtained from a preset battery database, wherein the operating condition segment includes a slow charging segment or a discharging segment; Determining an SOC correction point corresponding to the operating condition segment, and determining a fitting formula corresponding to the SOC correction point; Acquire a current SOH corresponding to the SOC correction point in a preset SOH database, and calculate a first marked SOC corresponding to the SOC correction point according to the fitting formula and the current SOH; Acquire the SOC consistency difference corresponding to the battery in a preset SOC consistency database, and calculate the real SOC of the battery according to the first marked SOC and the SOC consistency difference; The displayed SOC is corrected according to the actual SOC.

2. The battery SOC correction method according to claim 1, characterized in that: The calculating the real SOC of the battery according to the first marked SOC and the SOC consistency difference comprises: Determine a second marked SOC calculation formula corresponding to the operating condition segment; Calculating a second marked SOC corresponding to the SOC correction point according to the first marked SOC, the SOC consistency difference and the second marked SOC calculation formula; The real SOC of the battery is calculated according to the first marked SOC and the second marked SOC.

3. The battery SOC correction method according to claim 2, characterized in that: The first marked SOC includes the minimum marked SOC corresponding to the operating condition segment, and the second marked SOC includes the maximum marked SOC corresponding to the operating condition segment; The second marking SOC calculation formula includes: max_SOC=min_SOC+ΔSOC Wherein, min_SOC represents the minimum marked SOC, max_SOC represents the maximum marked SOC, and ΔSOC represents the SOC consistency difference.

4. The battery SOC correction method according to claim 2 or 3, characterized in that: The calculating the real SOC of the battery according to the first marked SOC and the second marked SOC includes: Calculating the real SOC of the battery according to the first marked SOC, the second marked SOC and a preset real SOC calculation formula; Wherein, the real SOC calculation formula includes: Among them, real_SOC represents the real SOC, min_SOC represents the first marked SOC, and max_SOC represents the second marked SOC.

5. The battery SOC correction method according to any one of claims 1 to 3, characterized in that: The determining of the SOC correction point corresponding to the operating condition segment includes: Acquire a target curve set corresponding to the operating condition segment in the battery database, the target curve set comprising an ampere-hour integrated capacity-voltage curve set and a pressure difference change curve; When the operating condition segment includes the slow charging segment, the set of ampere-hour integrated capacity-voltage curves is analyzed to obtain at least one voltage platform, and a target voltage platform is determined in each of the voltage platforms, or the pressure difference change curve is analyzed to obtain a first pressure difference feature; Determine the starting point of the target voltage platform as the SOC correction point corresponding to the operating condition segment, or determine the SOC correction point corresponding to the operating condition segment according to the first pressure difference characteristic; When the operating condition segment includes the discharging segment, the pressure difference variation curve is analyzed to obtain a second pressure difference characteristic, and the SOC correction point corresponding to the operating condition segment is determined according to the second pressure difference characteristic.

6. The battery SOC correction method according to claim 5, characterized in that: The ampere-hour integrated capacity-voltage curve set includes at least one ampere-hour integrated capacity-voltage curve; The determining of the fitting formula corresponding to the SOC correction point includes: For each of the ampere-hour integrated capacity-voltage curves, determining a target starting point of a target voltage platform corresponding to the ampere-hour integrated capacity-voltage curve; The target starting point of each of the ampere-hour integrated capacity-voltage curves is fitted to obtain a fitting formula corresponding to the SOC correction point.

7. The battery SOC correction method according to any one of claims 1 to 3, characterized in that: The correcting the displayed SOC according to the real SOC includes: Determine whether the real SOC is equal to the displayed SOC, and obtain a determination result; When the judgment result indicates that the real SOC is equal to the displayed SOC, the displayed SOC is not corrected; When the judgment result indicates that the real SOC is not equal to the displayed SOC, the displayed SOC is corrected by a preset correction method.

8. The battery SOC correction method according to claim 7, characterized in that: When the judgment result indicates that the real SOC is not equal to the displayed SOC, the preset correction method includes an SOC following correction method.

9. A battery SOC correction device, 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 battery SOC correction method 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 SOC correction method of the battery as described in any one of claims 1-8.

Images