SOC correction method, device, vehicle, server and storage medium

Abstract

The present invention relates to the field of vehicle technology, and in particular to a SOC correction method, device, vehicle, server and storage medium, wherein the method comprises: obtaining battery data of a power battery; uploading the battery data to a server, wherein the server calculates the first state of charge SOC of the power battery at a target time according to the battery data, and calculates the SOC difference according to the first SOC and the second SOC of the power battery at the target time in the battery data; shielding one or more SOC correction strategies of the power battery, calculating the target SOC according to the SOC difference and the SOC of the power battery at the current time, and correcting the SOC of the power battery to the target SOC. Thus, the problems in the related art that the deviation of SOC may cause power interruption and low driving safety; and the delay in the information interaction between the vehicle and the server, which may cause the SOC correction strategy to have deviations and the accuracy of the correction result to be low, are solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a SOC (state of charge) correction method, device, vehicle, server and storage medium. Background Art

[0002] Lithium batteries play an important role in the application of battery energy storage systems due to their high energy density and long life. They are crucial energy storage units in new energy vehicles. Since lithium batteries are a complex electrochemical system with extremely strong nonlinear characteristics, the SOC estimation methods that can be used include the ampere-hour integration method, the equivalent model method, and the machine learning method.

[0003] Application No. 201911214263.1 (Intelligent Battery SOC Management System and Method Based on Cloud Platform) discloses an intelligent battery SOC management system and method based on cloud platform, which includes: BMS (Battery Management System) system, cloud server, cloud server readjusts the correction coefficient according to the operating parameters of the battery module and its historical operating parameter information, obtains a new correction coefficient, and sends it to the BMS system. The patent discloses a battery management system based on cloud platform, which provides a large framework for collaboration between vehicle and cloud.

[0004] Application No. 202111528176.0 (Battery SOC correction system, control method thereof, storage medium and electric vehicle) provides a battery SOC correction system for an electric vehicle, a control method thereof, a storage medium and an electric vehicle. The battery SOC correction system includes: a data acquisition module, a data transmission module, and a cloud server. The initial value of the state of charge of the electric vehicle at this startup is fed back to the battery management system of the electric vehicle or the Internet of Vehicles user terminal based on the state of charge history value and the state of charge wake-up value uploaded by the data transmission module, which can reduce the errors that may occur in the battery SOC estimation process and improve the estimation accuracy.

[0005] However, among the methods in the related art, the former does not provide an effective solution to the problems in practical applications such as how the vehicle and the cloud can exchange information, the time difference caused by delays in the information interaction process, and how to adjust the SOC on the vehicle side; the latter method only corrects the initial SOC value at the power-on time, and does not consider the delay in information transmission from the cloud to the vehicle side. In summary, in actual engineering applications, due to the limitations of the vehicle-side hardware conditions, the complex algorithm strategies in the related technology are difficult to implement, and the SOC is prone to deviations, which may lead to serious problems such as power interruption; although the use of cloud computing can reduce computing pressure, there is a delay in data interaction between the vehicle and the cloud server, and information transmission may not be timely. Summary of the invention

[0006] One of the purposes of the present invention is to provide a SOC correction method to solve the problems in the related art that SOC deviation may cause power interruption and low driving safety; and there is a delay in the information exchange between the vehicle and the server, which may cause the SOC correction strategy to deviate and the correction result to have low accuracy; the second purpose is to provide another SOC correction method; the third purpose is to provide an SOC correction device; the fourth purpose is to provide another SOC correction device; the fifth purpose is to provide a vehicle; the sixth purpose is to provide a server; and the seventh purpose is to provide a computer storage medium.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A SOC correction method, the method is applied to a vehicle, comprising: obtaining battery data of a power battery; uploading the battery data to a server, wherein the server calculates a first state of charge (SOC) of the power battery at a target time according to the battery data, and calculates an SOC difference according to the first SOC and a second SOC of the power battery at the target time in the battery data; shielding one or more SOC correction strategies of the power battery, calculating a target SOC according to the SOC difference and the SOC of the power battery at the current time, and correcting the SOC of the power battery to the target SOC.

[0009] According to the above-mentioned technical means, the embodiment of the present invention can calculate the SOC difference when a deviation occurs in the power battery, that is, the relative deviation value that needs to be corrected for the power battery, through the server. Since the relative deviation value estimation of the SOC is completed through the server, the estimation efficiency can be improved and the computing resources for correcting the SOC of the vehicle can be saved; at the same time, since the SOC correction strategy on the vehicle side is shielded, the relative deviation value of the SOC can remain basically unchanged from the target time and is not affected by the communication delay. Therefore, by shielding the SOC correction strategy on the vehicle side, the correction deviation caused by the delay in information interaction between the vehicle and the server can be effectively avoided, and the accuracy of the SOC correction can be improved, thereby reducing the possibility of power interruption caused by SOC deviation, ensuring the safe and stable operation of the vehicle, and meeting the actual use needs.

[0010] Further, shielding one or more SOC correction strategies of the power battery includes: obtaining the priority of each SOC correction strategy of the power battery; and shielding one or more SOC correction strategies whose priority is less than or equal to a preset priority.

[0011] According to the above-mentioned technical means, the embodiment of the present invention can determine to block the SOC correction strategy with a lower priority by comparing the priority of each SOC correction strategy with the preset priority. Since the correction strategy with a higher priority can correct the vehicle SOC more accurately, the accuracy of the SOC correction can be improved, thereby improving the safety and stability of the vehicle operation and meeting the actual use needs.

[0012] Furthermore, correcting the SOC of the power battery to the target SOC includes: detecting whether a SOC correction strategy with a priority greater than a preset priority is triggered during the current SOC correction process; if a SOC correction strategy with a priority greater than the preset priority is detected, stopping the current SOC correction process, and correcting the SOC of the power battery based on the SOC correction strategy with a priority greater than the preset priority.

[0013] According to the above-mentioned technical means, the embodiment of the present invention can detect and determine whether there is a SOC correction strategy with a higher priority in the current SOC correction process. When it is detected that there is, the execution of the current SOC correction strategy is stopped, and the SOC of the power battery is corrected with the SOC value of the high-priority strategy. Since the correction of a correction strategy with a higher priority is more accurate, the SOC correction strategy with a lower priority is shielded in time, which can avoid the problem of inaccurate correction results caused by untimely response to the correction strategy with a higher priority, thereby improving the accuracy of the correction results and meeting actual use needs.

[0014] Furthermore, the correcting the SOC of the power battery to the target SOC also includes: detecting a current scene of the vehicle; determining a target correction rate of the power battery according to the current scene; and correcting the SOC of the power battery according to the target correction rate.

[0015] According to the above-mentioned technical means, the embodiment of the present invention can confirm the target correction rate of the power battery correction according to the scenario, so as to use different approximation rates to complete the correction of the vehicle SOC in different actual scenarios, prevent the vehicle SOC from jumping and affecting other functions and user experience, ensure the safe and stable operation of the battery system, meet actual use needs, and improve user experience.

[0016] Furthermore, the correcting the SOC of the power battery to the target SOC further includes: integrating the power battery from the current moment to obtain a third SOC in real time; and updating the target SOC according to the third SOC until the SOC of the power battery is corrected to the target SOC.

[0017] According to the above technical means, the embodiment of the present invention can use an integral method to update the target SOC in real time, so that the target SOC is more compatible with the current vehicle state, the accuracy of the SOC correction strategy is improved, the safe and stable operation of the battery system is ensured, and actual use needs are met.

[0018] Furthermore, after the SOC of the power battery is corrected to the target SOC, the method further includes: restoring one or more SOC correction strategies of the power battery.

[0019] Furthermore, before correcting the SOC of the power battery to the target SOC, it also includes: determining whether the vehicle satisfies a first correction condition based on the battery data; if the vehicle satisfies the first correction condition, correcting the SOC of the power battery to the target SOC, otherwise no correction is performed.

[0020] According to the above technical means, since the SOC relative deviation value of the embodiment of the present invention remains basically unchanged from the target moment, the embodiment of the present invention can determine whether the vehicle meets the SOC correction conditions based on the vehicle battery data. When the correction conditions are not met, the SOC correction of the power battery is not performed, which improves the accuracy and applicability of the SOC correction strategy and meets actual use needs.

[0021] Further, determining whether the vehicle satisfies a first correction condition based on the battery data includes: obtaining an interval duration from the last correction time of the power battery and a cumulative throughput capacity of the battery; if the interval duration is greater than a first preset duration, and / or the cumulative throughput capacity of the battery is greater than a first preset capacity, determining that the vehicle satisfies the first correction condition.

[0022] According to the above technical means, since the SOC relative deviation value of the embodiment of the present invention remains basically unchanged from the target moment, the embodiment of the present invention can use the correction interval time and the battery cumulative throughput capacity to determine whether the vehicle meets the correction conditions. When the correction conditions are not met, no SOC correction is performed, thereby saving correction resources and meeting actual use needs.

[0023] A SOC correction method, the method is applied to a server, comprising: obtaining battery data of a power battery uploaded by a vehicle; calculating a first state of charge SOC of the power battery at a target time according to the battery data, and calculating a SOC difference according to the first SOC and a second SOC of the power battery at the target time in the battery data; sending the SOC difference to the vehicle, wherein the vehicle shields one or more SOC correction strategies of the power battery, calculates a target SOC according to the SOC difference and the SOC of the power battery at the current time, and corrects the SOC of the power battery to the target SOC.

[0024] Furthermore, before sending the SOC difference to the vehicle, it also includes: determining whether the vehicle meets a second correction condition based on the battery data; if the vehicle meets the second correction condition, sending the SOC difference to the vehicle.

[0025] Furthermore, determining whether the vehicle satisfies the second correction condition based on the battery data includes: identifying the last correction time of the power battery and the battery cumulative throughput capacity in the battery data; calculating a deviation threshold based on the interval from the last correction time to the current time and the battery cumulative throughput capacity, and if the SOC difference is less than the deviation threshold, determining whether the vehicle satisfies the second correction condition.

[0026] Further, determining whether the vehicle satisfies a second correction condition based on the battery data also includes: if the interval duration is greater than a second preset duration, and / or the battery cumulative throughput capacity is greater than a second preset capacity, determining whether the vehicle satisfies a second correction condition.

[0027] A SOC correction device, the device application server, includes: a first acquisition module, used to obtain battery data of a power battery; an upload module, used to upload the battery data to the server, wherein the server calculates a first state of charge SOC of the power battery at a target time according to the battery data, and calculates an SOC difference according to the first SOC and a second SOC of the power battery at the target time in the battery data; a correction module, used to shield one or more SOC correction strategies of the power battery, calculate a target SOC according to the SOC difference and the SOC of the power battery at the current time, and correct the SOC of the power battery to the target SOC.

[0028] Furthermore, the correction module is further used to: obtain the priority of each SOC correction strategy of the power battery; and shield one or more SOC correction strategies whose priority is less than or equal to a preset priority.

[0029] Furthermore, the correction module is further used to: detect whether a SOC correction strategy with a priority greater than a preset priority is triggered during the current SOC correction process; if a SOC correction strategy with a priority greater than the preset priority is detected, stop the current SOC correction process, and correct the SOC of the power battery based on the SOC correction strategy with a priority greater than the preset priority.

[0030] Furthermore, the correction module is further used to: detect the current scene of the vehicle; determine the target correction rate of the power battery according to the current scene; and correct the SOC of the power battery according to the target correction rate.

[0031] Furthermore, the correction module is further used to: integrate the power battery from the current moment to obtain a third SOC in real time; and update the target SOC according to the third SOC until the SOC of the power battery is corrected to the target SOC.

[0032] Furthermore, the correction module is further used to: restore one or more SOC correction strategies of the power battery.

[0033] Furthermore, the correction module is further used to: determine whether the vehicle meets a first correction condition based on the battery data; if the vehicle meets the first correction condition, correct the SOC of the power battery to the target SOC, otherwise no correction is performed.

[0034] Furthermore, the correction module is further used to: obtain the interval time from the power battery to the last correction time and the battery cumulative throughput capacity; if the interval time is greater than a first preset time, and / or the battery cumulative throughput capacity is greater than a first preset capacity, it is determined that the vehicle meets the first correction condition.

[0035] A SOC correction device, which is applied to a server, comprises: a second acquisition module, used to obtain battery data of a power battery uploaded by a vehicle; a calculation module, used to calculate a first state of charge SOC of the power battery at a target time according to the battery data, and calculate an SOC difference according to the first SOC and a second SOC of the power battery at the target time in the battery data; and a sending module, used to send the SOC difference to the vehicle, wherein the vehicle shields one or more SOC correction strategies of the power battery, calculates a target SOC according to the SOC difference and the SOC of the power battery at the current time, and corrects the SOC of the power battery to the target SOC.

[0036] Furthermore, the sending module is further used to: determine whether the vehicle meets a second correction condition based on the battery data; if the vehicle meets the second correction condition, send the SOC difference to the vehicle.

[0037] Furthermore, the sending module is further used to: identify the last correction time of the power battery and the battery cumulative throughput capacity in the battery data; calculate the deviation threshold according to the interval from the last correction time to the current time and the battery cumulative throughput capacity, and if the SOC difference is less than the deviation threshold, determine whether the vehicle meets the second correction condition.

[0038] Furthermore, the sending module is further used to: if the interval duration is greater than a second preset duration, and / or the battery cumulative throughput capacity is greater than a second preset capacity, determine whether the vehicle meets a second correction condition.

[0039] A vehicle comprises the SOC correction device as described in the above embodiment.

[0040] A server includes the SOC correction device according to the above embodiment.

[0041] A computer-readable storage medium stores a computer program, which is executed by a processor to implement the SOC correction method as described in the above embodiment.

[0042] Beneficial effects of the present invention:

[0043] (1) The embodiment of the present invention can calculate the SOC difference when the power battery has a deviation, that is, the relative deviation value that the power battery needs to correct, through the server. Since the relative deviation value of SOC is estimated through the server, the estimation efficiency can be improved, and the computing resources for correcting the SOC of the vehicle can be saved; at the same time, since the SOC correction strategy on the vehicle side is shielded, the relative deviation value of SOC can remain basically unchanged from the target time, and is not affected by the communication delay. Therefore, by shielding the SOC correction strategy on the vehicle side, the correction deviation caused by the information interaction delay between the vehicle and the server can be effectively avoided, and the accuracy of SOC correction can be improved, thereby reducing the possibility of power interruption caused by SOC deviation, ensuring the safe and stable operation of the vehicle, and meeting the actual use needs;

[0044] (2) The embodiment of the present invention can compare the priority of each SOC correction strategy with the preset priority to determine whether to block the SOC correction strategy with a lower priority. Since the correction strategy with a higher priority can correct the vehicle SOC more accurately, the accuracy of SOC correction can be improved, thereby improving the safety and stability of vehicle operation and meeting actual use needs.

[0045] (3) The embodiment of the present invention can detect and determine whether there is a SOC correction strategy with a higher priority in the current SOC correction process. When it is detected that there is, the execution of the current SOC correction strategy is stopped, and the SOC of the power battery is corrected with the SOC value of the high-priority strategy. Since the correction of the correction strategy with a higher priority is more accurate, the SOC correction strategy with a lower priority is shielded in time, which can avoid the problem of inaccurate correction results caused by untimely response to the correction strategy with a higher priority, thereby improving the accuracy of the correction results and meeting the actual use needs.

[0046] (4) The embodiment of the present invention can confirm the target correction rate of the power battery correction according to the scenario, so as to use different approximation rates to complete the correction of the vehicle SOC in different actual scenarios, prevent the vehicle SOC from jumping and affecting other functions and user experience, ensure the safe and stable operation of the battery system, meet the actual use needs, and improve the user experience;

[0047] (5) The embodiment of the present invention can use an integral method to update the target SOC in real time, so that the target SOC is more compatible with the current vehicle state, the accuracy of the SOC correction strategy is improved, and the safe and stable operation of the battery system is ensured to meet the actual use needs;

[0048] (6) Since the SOC relative deviation value of the embodiment of the present invention remains substantially unchanged from the target time, the embodiment of the present invention can determine whether the vehicle meets the SOC correction condition based on the vehicle battery data. When the correction condition is not met, the SOC of the power battery is not corrected, thereby improving the accuracy and applicability of the SOC correction strategy and meeting the actual use needs;

[0049] (7) Since the SOC relative deviation value of the embodiment of the present invention remains basically unchanged from the target time, the embodiment of the present invention can use the correction interval time and the battery cumulative throughput capacity to determine whether the vehicle meets the correction conditions. If the correction conditions are not met, no SOC correction is performed, thereby saving correction resources and meeting actual use needs.

[0050] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a flow chart of a SOC correction method according to the present invention;

[0052] Figure 2 Schematic diagram of the flow of the SOC estimation method of the present invention;

[0053] Figure 3 A flowchart showing that the cloud-vehicle interaction of the present invention normally completes the vehicle-cloud fusion correction;

[0054] Figure 4 Car-cloud fusion correction diagram for the discharge phase of the present invention;

[0055] Figure 5 A flowchart of the termination of the cloud-vehicle interaction of the present invention;

[0056] Figure 6 is a flow chart of another SOC correction method according to the present invention;

[0057] Figure 7 is an exemplary diagram of the SOC correction device according to the present invention;

[0058] Figure 8 FIG. 4 is an exemplary diagram of another SOC correction device according to the present invention. DETAILED DESCRIPTION

[0059] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0060] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0061] In related technologies, lithium batteries play an important role in the application of battery energy storage systems due to their high energy density and long life. They are vital energy storage units in new energy vehicles. Lithium batteries are a complex electrochemical system with extremely strong nonlinear characteristics.

[0062] Among them, SOC represents the battery's state of charge and is an important basis and foundation for battery status monitoring and vehicle control. SOC estimation is one of the core functions of BMS; SOC estimation methods in related technologies mainly include: ampere-hour integration method, equivalent model method and machine learning method.

[0063] However, in actual engineering applications, due to the hardware conditions on the vehicle side, it is difficult to implement complex algorithm strategies, and SOC is prone to deviations, which may lead to serious problems such as power interruption. The cloud platform has stronger computing power than the vehicle side, can run more complex algorithms, and has a large amount of vehicle historical data as support. With the continuous development of current technology, the electrification, intelligence, and networking of automobiles have become an inevitable trend. However, in related technologies, there is a delay in the information transmission between vehicles and cloud platform servers, and the accuracy of SOC estimation is low.

[0064] The embodiments of the present invention can propose a SOC correction method, device, vehicle, server and storage medium to solve the problems in the related art that SOC deviation may cause power interruption and low driving safety; and there is a delay in the information exchange between the vehicle and the server, which may cause the SOC correction strategy to deviate and the correction result to be less accurate.

[0065] Specifically, Figure 1 A flow chart of a SOC correction method provided by an embodiment of the present invention.

[0066] like Figure 1 As shown, the SOC correction method is applied to a vehicle, comprising the following steps:

[0067] In step S101 , battery data of a power battery is acquired.

[0068] Among them, Figure 2 As shown, the battery data of the embodiment of the present invention may include battery current, voltage, temperature, etc.; the vehicle of the embodiment of the present invention can use at least one method to obtain the battery data of the power battery, such as using BMS to obtain and upload to a big data cloud platform as a server, etc., without specific limitation.

[0069] It can be understood that the embodiment of the present invention can first acquire the battery data of the power battery in real time, so as to facilitate the subsequent steps of applying the battery data and correcting the battery SOC; the vehicle of the embodiment of the present invention can include a BMS vehicle-side battery management system, and the BMS system includes an SOC estimation function. The vehicle can upload the current, voltage, temperature, etc. collected by the BMS to the server, and can receive the signal sent by the server; in the following embodiments, it will be explained based on a new energy vehicle with a power battery and a big data cloud platform as a server; among them, the server side will be explained in detail in the following embodiments and will not be repeated here.

[0070] In step S102, the battery data is uploaded to the server, wherein the server calculates a first state of charge SOC of the power battery at the target time according to the battery data, and calculates an SOC difference according to the first SOC and a second SOC of the power battery at the target time in the battery data.

[0071] The target time can be set according to actual conditions and is not specifically limited thereto.

[0072] It is understandable that the vehicle of the embodiment of the present invention can upload the battery data obtained in the above step S101 to the server, and then the server calculates the obtained battery data to obtain the difference between the calculated SOC value at a certain moment and the SOC value of the vehicle at the corresponding moment.

[0073] In step S103, one or more SOC correction strategies of the power battery are shielded, a target SOC is calculated according to the SOC difference and the SOC of the power battery at the current moment, and the SOC of the power battery is corrected to the target SOC.

[0074] Among them, the SOC correction strategy of the embodiment of the present invention may include effective OCV-SOC (Open Circuit Voltage, open circuit voltage) table correction, full charge correction, vehicle-cloud SOC fusion and other correction strategies, which are not specifically limited; the target SOC can be used to correct the SOC of the power battery at the current moment, and can be set according to the actual situation and obtained by calculation, and its calculation formula can be as follows:

[0075] Target SOC(t) = target SOC(t-1)-i(t)*Δt / 3600Q 额定 ,

[0076] Among them, Q 额定 is the rated capacity, Δt is the time interval, i(t) is the real-time current, the discharge current sign is positive, the charging current sign is negative, the target SOC(t-1) is the target SOC at the previous moment, and the target SOC(t) is the target SOC at the current moment. The embodiment of the present invention can use the target SOC(t) as the target value according to the current vehicle SOC, and use a gradual approach to achieve SOC correction to prevent the vehicle SOC from jumping and affecting other functions and user experience.

[0077] It is understandable that the embodiment of the present invention can shield the vehicle SOC correction strategy and perform SOC calculation based on the SOC difference obtained in the above step S102 and the SOC value of the vehicle at the current moment, so that the vehicle can correct the current SOC to the calculated target SOC based on the calculation result.

[0078] In an embodiment of the present invention, shielding one or more SOC correction strategies of the power battery also includes: obtaining the priority of each SOC correction strategy of the power battery; and shielding one or more SOC correction strategies whose priority is less than or equal to a preset priority.

[0079] Among them, the priority and preset priority of each correction strategy can be set according to actual conditions. For example, the embodiment of the present invention can consider full charge correction, effective OCV-SOC correction, etc. as correction strategies with higher priority, which is greater than the preset priority, etc., and no specific limitation is made to this.

[0080] It is understandable that the embodiment of the present invention can first obtain the priority of each SOC correction strategy, so as to screen out SOC correction strategies that do not meet the requirements based on the comparison of the priority of each SOC correction strategy with the preset priority, and then shield the strategies with priorities lower than the preset priority.

[0081] It should be noted that, before the SOC of the power battery is corrected, the embodiment of the present invention may also prepare for the SOC correction of the power battery and further restrict the correction conditions. The specific steps may be as shown in the following embodiment:

[0082] (1) Determine whether the vehicle meets the vehicle-cloud SOC fusion correction conditions:

[0083] In an embodiment of the present invention, before the SOC of the power battery is corrected to the target SOC, it also includes: determining whether the vehicle meets the first correction condition based on the battery data; if the vehicle meets the first correction condition, the SOC of the power battery is corrected to the target SOC, otherwise no correction is performed.

[0084] Among them, the first correction condition can be set according to actual conditions and is not specifically limited.

[0085] It is understandable that the embodiment of the present invention may set a first correction condition, and judge whether the vehicle meets the correction condition of SOC according to the comparison between the actual vehicle condition and the preset first correction condition; if the correction condition is met, the embodiment of the present invention may correct the SOC of the power battery to the target SOC, and if the correction condition is not met, no correction is performed; wherein, the first correction condition of the embodiment of the present invention may be specifically as follows:

[0086] In an embodiment of the present invention, determining whether the vehicle meets the first correction condition based on the battery data includes: obtaining the interval time from the power battery to the last correction time and the battery cumulative throughput capacity; if the interval time is greater than the first preset time, and / or the battery cumulative throughput capacity is greater than the first preset capacity, then determining that the vehicle meets the first correction condition.

[0087] The first preset duration and the first preset capacity can be specifically set according to actual conditions, and no specific limitation is made thereto. The calculation formula for the cumulative throughput capacity in the embodiment of the present invention can be as follows:

[0088]

[0089] It is understandable that if Figure 3 As shown, the embodiment of the present invention can further use the server to determine whether to perform vehicle-cloud SOC fusion: the server can obtain the time when the vehicle last performed an effective SOC correction, calculate the interval time to the current moment, and obtain the battery's cumulative throughput capacity at the same time; when the interval time is greater than a preset first preset time, or the battery's cumulative throughput capacity is greater than the preset first preset capacity, or both are met, then the embodiment of the present invention can determine that the vehicle meets the vehicle-cloud SOC fusion conditions and perform vehicle-cloud SOC fusion; otherwise, it is determined that the fusion conditions are not met and the vehicle-cloud SOC fusion is not performed.

[0090] Specifically, the server determines the conditions for the vehicle-side and server-side SOC fusion: the absolute value of the difference between the SOC calculated by the vehicle-side last time on the server and the vehicle SOC does not exceed the threshold value f(t,Q). Where t and Q are the time from the last effective vehicle SOC correction to the current moment and the battery cumulative throughput capacity, respectively, and f(t,Q) is the maximum possible SOC deviation calibrated according to t and Q; when the above conditions are not met, the server will not send the vehicle-cloud SOC fusion information.

[0091] It should be noted that if the embodiment of the present invention performs vehicle-cloud SOC fusion correction, then Figure 3 As shown, the vehicle-cloud SOC fusion steps of the embodiment of the present invention can be specifically as follows: the first step, the cloud server sends a correction request; the second step, the vehicle-side performs a preparation operation, shields the low-priority SOC correction strategy, and feeds back a preparation completion signal; the third step, the server sends a vehicle-cloud fusion SOC correction instruction; the fourth step, that is, the vehicle-side makes a decision on whether to perform vehicle-cloud SOC fusion correction in the above embodiment; the fifth step, the vehicle-side performs a vehicle-cloud fusion SOC correction operation; the sixth step, feeds back a correction success signal. Among them, in the fifth step of the above embodiment, when the vehicle-side of the embodiment of the present invention performs vehicle-cloud SOC fusion correction, it can calculate the target SOC according to the received SOC correction instruction and the vehicle SOC as in the calculation formula in the above embodiment, and then perform ampere-hour integration to update the target SOC in real time:

[0092] Specifically, correcting the SOC of the power battery to the target SOC further includes: integrating the power battery from the current moment to obtain a third SOC in real time; and updating the target SOC according to the third SOC until the SOC of the power battery is corrected to the target SOC.

[0093] It can be understood that the embodiment of the present invention can integrate the power battery in real time and update the target SOC in real time with the integrated SOC value. The embodiment of the present invention can adopt a gradual approximation method to achieve SOC correction to prevent the vehicle SOC from jumping and affecting other functions and user experience.

[0094] It should be noted that when the vehicle SOC of the embodiment of the present invention is corrected to the target SOC, the vehicle-cloud fusion process can be ended, and the effect after fusion can be as follows: Figure 4 As shown; during the vehicle-cloud fusion process, if a SOC correction strategy with a higher priority appears, the embodiment of the present invention will immediately terminate the vehicle-cloud fusion process, as follows:

[0095] Specifically, the SOC of the power battery is corrected to the target SOC, including: detecting whether a SOC correction strategy with a priority greater than a preset priority is triggered during the current SOC correction process; if a SOC correction strategy with a priority greater than the preset priority is detected, the current SOC correction process is stopped, and the SOC of the power battery is corrected based on the SOC correction strategy with a priority greater than the preset priority.

[0096] It is understandable that if Figure 5 As shown, the embodiment of the present invention can determine whether there is a strategy with a priority greater than the preset priority in the current SOC correction process, and determine whether it is triggered; when a SOC correction strategy with a higher priority is detected, the embodiment of the present invention can immediately terminate the current vehicle-cloud fusion SOC correction strategy, change the SOC correction strategy, and use the SOC correction strategy with a higher priority as the current correction strategy to meet actual usage needs.

[0097] (2) Determine the correction rate of the power battery:

[0098] In an embodiment of the present invention, before correcting the SOC of the power battery to the target SOC, it also includes: detecting the current scene of the vehicle; determining the target correction rate of the power battery according to the current scene; and correcting the SOC of the power battery according to the target correction rate.

[0099] It is understandable that, when in different actual scenarios, the present invention can be implemented using different approximation rates to complete the correction, thereby ensuring the safety of the battery system and the stable operation of the system.

[0100] In the embodiment of the present invention, after the SOC of the power battery is corrected to the target SOC, the method further includes: restoring one or more SOC correction strategies of the power battery.

[0101] It can be understood that after the correction of the power battery SOC is completed, the embodiment of the present invention can also restore the previously blocked SOC correction strategy; wherein, if the embodiment of the present invention does not perform the vehicle-cloud SOC fusion in the above embodiment, it can feedback a rejection signal of the vehicle-cloud SOC fusion to the server and restore the blocked SOC correction strategy.

[0102] The SOC correction method proposed in the embodiment of the present invention has at least the following advantages:

[0103] (1) The embodiment of the present invention can calculate the SOC difference when the power battery has a deviation, that is, the relative deviation value that the power battery needs to correct, through the server. Since the relative deviation value of SOC is estimated through the server, the estimation efficiency can be improved, and the computing resources for correcting the SOC of the vehicle can be saved; at the same time, since the SOC correction strategy on the vehicle side is shielded, the relative deviation value of SOC can remain basically unchanged from the target time, and is not affected by the communication delay. Therefore, by shielding the SOC correction strategy on the vehicle side, the correction deviation caused by the information interaction delay between the vehicle and the server can be effectively avoided, and the accuracy of SOC correction can be improved, thereby reducing the possibility of power interruption caused by SOC deviation, ensuring the safe and stable operation of the vehicle, and meeting the actual use needs;

[0104] (2) The embodiment of the present invention can compare the priority of each SOC correction strategy with the preset priority to determine whether to block the SOC correction strategy with a lower priority. Since the correction strategy with a higher priority can correct the vehicle SOC more accurately, the accuracy of SOC correction can be improved, thereby improving the safety and stability of vehicle operation and meeting actual use needs.

[0105] (3) The embodiment of the present invention can detect and determine whether there is a SOC correction strategy with a higher priority in the current SOC correction process. When it is detected that there is, the execution of the current SOC correction strategy is stopped, and the SOC of the power battery is corrected with the SOC value of the high-priority strategy. Since the correction of the correction strategy with a higher priority is more accurate, the SOC correction strategy with a lower priority is shielded in time, which can avoid the problem of inaccurate correction results caused by untimely response to the correction strategy with a higher priority, thereby improving the accuracy of the correction results and meeting the actual use needs.

[0106] (4) The embodiment of the present invention can confirm the target correction rate of the power battery correction according to the scenario, so as to use different approximation rates to complete the correction of the vehicle SOC in different actual scenarios, prevent the vehicle SOC from jumping and affecting other functions and user experience, ensure the safe and stable operation of the battery system, meet the actual use needs, and improve the user experience;

[0107] (5) The embodiment of the present invention can use an integral method to update the target SOC in real time, so that the target SOC is more compatible with the current vehicle state, the accuracy of the SOC correction strategy is improved, and the safe and stable operation of the battery system is ensured to meet the actual use needs;

[0108] (6) Since the SOC relative deviation value of the embodiment of the present invention remains substantially unchanged from the target time, the embodiment of the present invention can determine whether the vehicle meets the SOC correction condition based on the vehicle battery data. When the correction condition is not met, the SOC of the power battery is not corrected, thereby improving the accuracy and applicability of the SOC correction strategy and meeting the actual use needs;

[0109] (7) Since the SOC relative deviation value of the embodiment of the present invention remains basically unchanged from the target time, the embodiment of the present invention can use the correction interval time and the battery cumulative throughput capacity to determine whether the vehicle meets the correction conditions. If the correction conditions are not met, no SOC correction is performed, thereby saving correction resources and meeting actual use needs.

[0110] Based on the SOC correction of the previous embodiment, the embodiment of the present invention provides another SOC correction method. The present embodiment and the previous embodiment have different focuses in the description content, and the embodiments can refer to each other for the steps not described in detail. The SOC correction method proposed according to the embodiment of the present invention is described below with reference to the accompanying drawings.

[0111] Figure 6 A flowchart of another SOC correction method provided by an embodiment of the present invention.

[0112] like Figure 6 As shown, the SOC correction method is applied to the server, comprising the following steps:

[0113] In step S201, battery data of the power battery uploaded by the vehicle is obtained.

[0114] It can be understood that the server of the embodiment of the present invention can obtain the battery data of the power battery uploaded by the vehicle in the above step S101, so as to facilitate the application in the subsequent steps; wherein, the server of the embodiment of the present invention can be deployed with intelligent algorithms including but not limited to neural networks, decision trees, etc., and can perform accurate SOC estimation in certain specific scenarios or all scenarios based on the historical data and real-time data related to the battery in the cloud platform.

[0115] In step S202, a first state of charge SOC of the power battery at the target time is calculated according to the battery data, and an SOC difference is calculated according to the first SOC and a second SOC of the power battery at the target time in the battery data.

[0116] The target time can be set according to actual conditions and is not specifically limited thereto.

[0117] It is understandable that the embodiment of the present invention can use the battery data received by the server in the above step S201 to calculate the SOC difference of the power battery; wherein the calculation of the target SOC can be as follows:

[0118] Target SOC(t) = target SOC(t-1)-i(t)*Δt / 3600Q 额定 ,

[0119] Among them, Q 额定 is the rated capacity, Δt is the time interval, i(t) is the real-time current, the discharge current sign is positive, the charge current sign is negative, the target SOC(t-1) is the target SOC at the previous moment, and the target SOC(t) is the target SOC at the current moment. The embodiment of the present invention can smoothly implement SOC correction in a gradual approach based on the current vehicle SOC and with the target SOC(t) as the target value, to prevent the vehicle SOC from jumping and affecting other functions and user experience.

[0120] In step S203, the SOC difference is sent to the vehicle, wherein the vehicle shields one or more SOC correction strategies of the power battery, calculates the target SOC according to the SOC difference and the SOC of the power battery at the current moment, and corrects the SOC of the power battery to the target SOC.

[0121] It is understandable that the server of the embodiment of the present invention sends the SOC value obtained by the calculation in the above step S202 to the vehicle, so that the vehicle can execute control after receiving the SOC correction instruction to correct the current SOC towards the target SOC.

[0122] In the embodiment of the present invention, before sending the SOC difference to the vehicle, it also includes: determining whether the vehicle meets the second correction condition according to the battery data; if the vehicle meets the second correction condition, sending the SOC difference to the vehicle.

[0123] It can be understood that the server of the implementation embodiment of the present invention can first perform an inspection to determine whether the vehicle meets the correction conditions before sending the SOC difference to the vehicle. If the correction conditions are not met, no information exchange will be performed and the relevant SOC difference will not be sent; if the correction conditions are met, the SOC difference will be sent to facilitate subsequent calculations and applications.

[0124] In an embodiment of the present invention, determining whether the vehicle meets the second correction condition is based on the battery data, including: identifying the last correction time of the power battery and the battery's cumulative throughput capacity in the battery data; calculating a deviation threshold based on the interval from the last correction time to the current time and the battery's cumulative throughput capacity, and if the SOC difference is less than the deviation threshold, determining whether the vehicle meets the second correction condition.

[0125] It can be understood that the embodiment of the present invention can calculate the deviation threshold of the SOC difference based on the interval duration and the cumulative throughput capacity of the battery. When the SOC difference is less than the deviation threshold, the present invention can consider that the current vehicle power battery needs to perform SOC correction; if the difference is greater than the threshold, the embodiment of the present invention can consider that the current vehicle power battery does not meet the correction conditions.

[0126] In an embodiment of the present invention, determining whether the vehicle satisfies the second correction condition based on the battery data also includes: if the interval duration is greater than the second preset duration, and / or the battery cumulative throughput capacity is greater than the second preset capacity, determining whether the vehicle satisfies the second correction condition.

[0127] Among them, the second preset duration can be set according to actual conditions and is not specifically limited.

[0128] It can be understood that the embodiment of the present invention can use the correction interval time and the battery's cumulative throughput capacity to determine whether the vehicle meets the correction conditions, and will not perform SOC correction when the correction conditions are not met; thus, the embodiment of the present invention can determine whether the vehicle performs a fused SOC correction and control the server to send SOC fusion information.

[0129] According to the SOC correction method proposed in the embodiment of the present invention, the SOC difference when a deviation occurs in the power battery, that is, the relative deviation value that needs to be corrected for the power battery, can be calculated by the server. Since the relative deviation value estimation of the SOC is completed through the server, the estimation efficiency can be improved and the computing resources for correcting the SOC of the vehicle can be saved; at the same time, since the SOC correction strategy on the vehicle side is shielded, the relative deviation value of the SOC can remain basically unchanged from the target moment and is not affected by the communication delay. Therefore, by shielding the SOC correction strategy on the vehicle side, the correction deviation caused by the delay in information interaction between the vehicle and the server can be effectively avoided, the accuracy of the SOC correction can be improved, and the possibility of power interruption caused by SOC deviation can be reduced, thereby ensuring the safe and stable operation of the vehicle and meeting the actual use needs.

[0130] The following describes an SOC correction device according to an embodiment of the present invention with reference to the accompanying drawings.

[0131] Figure 7 4 is a block diagram of an SOC correction device according to an embodiment of the present invention.

[0132] like Figure 7 As shown, the SOC correction device 10 is applied to a server, and includes: a first acquisition module 110 , an upload module 120 and a correction module 130 .

[0133] Among them, the first acquisition module 110 is used to acquire the battery data of the power battery; the upload module 120 is used to upload the battery data to the server, wherein the server calculates the first state of charge SOC of the power battery at the target time according to the battery data, and calculates the SOC difference according to the first SOC and the second SOC of the power battery at the target time in the battery data; the correction module 130 is used to shield one or more SOC correction strategies of the power battery, calculate the target SOC according to the SOC difference and the SOC of the power battery at the current moment, and correct the SOC of the power battery to the target SOC.

[0134] In the embodiment of the present invention, the correction module 130 is further used to: obtain the priority of each SOC correction strategy of the power battery; and shield one or more SOC correction strategies whose priority is less than or equal to a preset priority.

[0135] In an embodiment of the present invention, the correction module 130 is further used to: detect whether a SOC correction strategy with a priority greater than a preset priority is triggered during the current SOC correction process; if a SOC correction strategy with a priority greater than the preset priority is detected, stop the current SOC correction process, and correct the SOC of the power battery based on the SOC correction strategy with a priority greater than the preset priority.

[0136] In the embodiment of the present invention, the correction module 130 is further used to: detect the current scene of the vehicle; determine the target correction rate of the power battery according to the current scene; and correct the SOC of the power battery according to the target correction rate.

[0137] In the embodiment of the present invention, the correction module 130 is further used to: integrate the power battery from the current moment to obtain a third SOC in real time; and update the target SOC according to the third SOC until the SOC of the power battery is corrected to the target SOC.

[0138] In the embodiment of the present invention, the correction module 130 is further used to: restore one or more SOC correction strategies of the power battery.

[0139] In the embodiment of the present invention, the correction module 130 is further used to: determine whether the vehicle meets the first correction condition according to the battery data; if the vehicle meets the first correction condition, correct the SOC of the power battery to the target SOC, otherwise no correction is performed.

[0140] In an embodiment of the present invention, the correction module 130 is further used to: obtain the interval time from the power battery to the last correction time and the battery cumulative throughput capacity; if the interval time is greater than the first preset time, and / or the battery cumulative throughput capacity is greater than the first preset capacity, it is determined that the vehicle meets the first correction condition.

[0141] It should be noted that the aforementioned explanation of the SOC correction method embodiment is also applicable to the SOC correction device of this embodiment, and will not be repeated here.

[0142] According to the SOC correction device proposed in the embodiment of the present invention, the SOC difference when a deviation occurs in the power battery, that is, the relative deviation value that needs to be corrected for the power battery, can be calculated through the server. Since the relative deviation value estimation of the SOC is completed through the server, the estimation efficiency can be improved and the computing resources for correcting the SOC of the vehicle can be saved; at the same time, since the SOC correction strategy on the vehicle side is shielded, the relative deviation value of the SOC can remain basically unchanged from the target moment and is not affected by the communication delay. Therefore, by shielding the SOC correction strategy on the vehicle side, the correction deviation caused by the delay in information interaction between the vehicle and the server can be effectively avoided, the accuracy of the SOC correction can be improved, and the possibility of power interruption caused by SOC deviation can be reduced, thereby ensuring the safe and stable operation of the vehicle, meeting the actual use needs, and improving the user experience.

[0143] Another SOC correction device according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0144] Figure 8 4 is a block diagram of another SOC correction device according to an embodiment of the present invention.

[0145] like Figure 8 As shown, the SOC correction device 20 is applied to a vehicle, and includes: a second acquisition module 210 , a calculation module 220 and a sending module 230 .

[0146] Among them, the second acquisition module 210 is used to acquire the battery data of the power battery uploaded by the vehicle; the calculation module 220 is used to calculate the first state of charge SOC of the power battery at the target time according to the battery data, and calculate the SOC difference according to the first SOC and the second SOC of the power battery at the target time in the battery data; the sending module 230 is used to send the SOC difference to the vehicle, wherein the vehicle shields one or more SOC correction strategies of the power battery, calculates the target SOC according to the SOC difference and the SOC of the power battery at the current moment, and corrects the SOC of the power battery to the target SOC.

[0147] In the embodiment of the present invention, the sending module 230 is further used to: shield one or more SOC correction strategies of the power battery according to the correction request.

[0148] In the embodiment of the present invention, the sending module 230 is further used to: determine whether the vehicle meets the second correction condition according to the battery data; if the vehicle meets the second correction condition, send the SOC difference to the vehicle.

[0149] In an embodiment of the present invention, the sending module 230 is further used to: identify the last correction time of the power battery and the battery's cumulative throughput capacity in the battery data; calculate the deviation threshold based on the interval from the last correction time to the current time and the battery's cumulative throughput capacity, and if the SOC difference is less than the deviation threshold, determine whether the vehicle meets the second correction condition.

[0150] In the embodiment of the present invention, the sending module 230 is further used to: if the interval duration is greater than the second preset duration, and / or the battery cumulative throughput capacity is greater than the second preset capacity, determine whether the vehicle meets the second correction condition.

[0151] It should be noted that the aforementioned explanation of the SOC correction method embodiment is also applicable to the SOC correction device of this embodiment, and will not be repeated here.

[0152] According to the SOC correction device proposed in the embodiment of the present invention, the SOC difference when a deviation occurs in the power battery, that is, the relative deviation value that needs to be corrected for the power battery, can be calculated through the server. Since the relative deviation value estimation of the SOC is completed through the server, the estimation efficiency can be improved and the computing resources for correcting the SOC of the vehicle can be saved; at the same time, since the SOC correction strategy on the vehicle side is shielded, the relative deviation value of the SOC can remain basically unchanged from the target moment and is not affected by the communication delay. Therefore, by shielding the SOC correction strategy on the vehicle side, the correction deviation caused by the delay in information interaction between the vehicle and the server can be effectively avoided, the accuracy of the SOC correction can be improved, and the possibility of power interruption caused by SOC deviation can be reduced, thereby ensuring the safe and stable operation of the vehicle and meeting the actual use needs.

[0153] An embodiment of the present invention further provides a vehicle, comprising the SOC correction device as described in the above embodiment.

[0154] An embodiment of the present invention further provides a server, comprising the SOC correction device as described in the above embodiment.

[0155] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above SOC correction method is implemented.

[0156] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0157] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0158] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0159] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0160] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0161] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A SOC correction method, characterized in that: The method is applied to a vehicle, wherein the method comprises the following steps: Obtain battery data of the power battery; Uploading the battery data to a server, wherein the server calculates a first state of charge SOC of the power battery at a target time according to the battery data, and calculates an SOC difference according to the first SOC and a second SOC of the power battery at the target time in the battery data; shielding one or more SOC correction strategies of the power battery, calculating a target SOC according to the SOC difference and the SOC of the power battery at a current moment, and correcting the SOC of the power battery to the target SOC; After the SOC of the power battery is corrected to the target SOC, the method further includes: Restoring one or more SOC correction strategies of the power battery.

2. The SOC correction method according to claim 1, characterized in that: The shielding of one or more SOC correction strategies of the power battery includes: Obtaining the priority of each SOC correction strategy of the power battery; One or more SOC correction strategies whose priority is less than or equal to a preset priority are shielded.

3. The SOC correction method according to claim 1 or 2, characterized in that: The correcting the SOC of the power battery to the target SOC includes: Detect whether a SOC correction strategy with a priority greater than a preset priority is triggered during the current SOC correction process; If the SOC correction strategy with a priority higher than the preset priority is detected, the current SOC correction process is stopped, and the SOC of the power battery is corrected based on the SOC correction strategy with a priority higher than the preset priority.

4. The SOC correction method according to claim 1, characterized in that: The correcting the SOC of the power battery to the target SOC further includes: Detecting a current scene of the vehicle; Determining a target correction rate of the power battery according to the current scene; The SOC of the power battery is corrected according to the target correction rate.

5. The SOC correction method according to claim 1 or 4, characterized in that: The correcting the SOC of the power battery to the target SOC further includes: Integrate the power battery from the current moment to obtain a third SOC in real time; The target SOC is updated according to the third SOC until the SOC of the power battery is corrected to the target SOC.

6. The SOC correction method according to claim 1, characterized in that: Before correcting the SOC of the power battery to the target SOC, the method further includes: determining whether the vehicle satisfies a first correction condition according to the battery data; If the vehicle meets the first correction condition, the SOC of the power battery is corrected to the target SOC; otherwise, no correction is performed.

7. The SOC correction method according to claim 6, characterized in that: The determining, based on the battery data, whether the vehicle satisfies a first correction condition comprises: Obtaining the time interval between the power battery and the last correction time and the battery cumulative throughput capacity; If the interval duration is greater than a first preset duration, and / or the battery cumulative throughput capacity is greater than a first preset capacity, it is determined that the vehicle meets the first correction condition.

8. A SOC correction method, characterized in that: The method is applied to a server, wherein the method comprises the following steps: Get the battery data of the power battery uploaded by the vehicle; Calculating a first state of charge SOC of the power battery at the target time according to the battery data, and calculating an SOC difference according to the first SOC and a second SOC of the power battery at the target time in the battery data; Sending the SOC difference to the vehicle, wherein the vehicle shields one or more SOC correction strategies of the power battery, calculates a target SOC according to the SOC difference and the SOC of the power battery at a current moment, and corrects the SOC of the power battery to the target SOC; After the SOC of the power battery is corrected to the target SOC, the method further includes: Restoring one or more SOC correction strategies of the power battery.

9. The SOC correction method according to claim 8, characterized in that: Before sending the SOC difference to the vehicle, the method further includes: determining whether the vehicle satisfies a second correction condition based on the battery data; If the vehicle satisfies the second correction condition, the SOC difference is sent to the vehicle.

10. The SOC correction method according to claim 9, characterized in that: The determining, based on the battery data, whether the vehicle satisfies a second correction condition comprises: Identify the last correction time of the power battery and the accumulated throughput capacity of the battery in the battery data; A deviation threshold is calculated according to the interval time from the last correction time to the current time and the accumulated throughput capacity of the battery. If the SOC difference is less than the deviation threshold, it is determined whether the vehicle meets the second correction condition.

11. The SOC correction method according to claim 10, characterized in that: The determining whether the vehicle satisfies a second correction condition according to the battery data further includes: If the interval duration is greater than a second preset duration, and / or the battery cumulative throughput capacity is greater than a second preset capacity, it is determined whether the vehicle satisfies a second correction condition.

12. A SOC correction device, characterized in that: The device is applied to a vehicle, wherein the device comprises: A first acquisition module, used to acquire battery data of a power battery; an uploading module, configured to upload the battery data to a server, wherein the server calculates a first state of charge SOC of the power battery at a target time according to the battery data, and calculates an SOC difference according to the first SOC and a second SOC of the power battery at the target time in the battery data; a correction module, configured to shield one or more SOC correction strategies of the power battery, calculate a target SOC according to the SOC difference and the SOC of the power battery at a current moment, and correct the SOC of the power battery to the target SOC; After the SOC of the power battery is corrected to the target SOC, the method further includes: Restoring one or more SOC correction strategies of the power battery.

13. A SOC correction device, characterized in that: The device is applied to a server, wherein the device comprises: The second acquisition module is used to acquire the battery data of the power battery uploaded by the vehicle; a calculation module, configured to calculate a first state of charge SOC of the power battery at a target time according to the battery data, and calculate an SOC difference according to the first SOC and a second SOC of the power battery at the target time in the battery data; a sending module, configured to send the SOC difference to the vehicle, wherein the vehicle shields one or more SOC correction strategies of the power battery, calculates a target SOC according to the SOC difference and the SOC of the power battery at a current moment, and corrects the SOC of the power battery to the target SOC; After the SOC of the power battery is corrected to the target SOC, the method further includes: Restoring one or more SOC correction strategies of the power battery.

14. A vehicle, characterized in that: Includes the SOC correction device as claimed in claim 12.

15. A server, characterized in that: Includes the SOC correction device as claimed in claim 13.

16. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the SOC correction method as described in any one of claims 1-11.

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