Vehicle SOC correction method and device, equipment and storage medium

Abstract

The invention discloses a vehicle SOC correction method and device, equipment and a storage medium, and relates to the technical field of vehicle data processing, and the method comprises the steps: obtaining a timer state and a historical SOC of a target vehicle, and obtaining a vehicle power-off state according to the timer state; when the vehicle power-off state is abnormal power-off and the target vehicle meets the static correction condition, the static voltage of the target vehicle is obtained, and a static SOC is obtained according to the static voltage; correcting the historical SOC based on the static SOC to obtain a target SOC; according to the method, whether the vehicle is powered off abnormally or not is judged according to the state of a timer when the vehicle is started, the more accurate static SOC is obtained according to the static voltage for the situation that the vehicle is powered off abnormally and the static correction condition is met, the historical SOC in the last power-off process is corrected based on the static SOC, the displayed SOC value of the battery is corrected as much as possible after the vehicle is powered off abnormally, and the battery SOC correction efficiency is improved. And by matching with the actual electric quantity of the battery, the safety risk in the vehicle use process is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle data processing technology, and in particular to a vehicle SOC correction method, device, equipment and storage medium. Background Art

[0002] At present, the popularity of electric vehicles is increasing, which is not only an important measure for my country to achieve green development and low-carbon economy, but also an important way to promote national scientific and technological innovation and enhance international competitiveness. In order to prevent the static correction from being triggered when the polarization reaction of the battery cell has not stopped after charging and discharging, causing the soc to be corrected to a value that does not match the actual power, thereby causing the power limit and charging rate limit to deviate from the actual situation.

[0003] There are many limitations in the SOC static correction process, such as: battery aging, temperature correction, different chemical systems, and abnormal power-off (loss of low-voltage power supply) cannot be statically corrected. In practical applications, if the vehicle is stored for a long time and not used, the low-voltage power supply of the entire vehicle is usually disconnected to prevent power loss. When the vehicle is used again, SOC static correction is required due to self-discharge and other reasons. Through SOC static correction, the electric vehicle does not store the power-off SOC when it is abnormally powered off. When the vehicle is restarted after a long time, the displayed SOC does not match the actual SOC, resulting in malfunctions during vehicle charging and discharging, and even affecting safety.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of this application is to provide a vehicle SOC correction method, device, equipment and storage medium, aiming to solve the technical problem that when the electric vehicle is abnormally powered off, the power-off SOC is not stored, and the vehicle displayed SOC and the actual SOC do not match when it is restarted after a long time, resulting in failures during vehicle charging and discharging that affect safety.

[0006] To achieve the above objectives, the present application proposes a vehicle SOC correction method, the vehicle SOC correction method comprising: Obtaining a timer status and a historical SOC of a target vehicle, and obtaining a vehicle power-off status according to the timer status; When the power-off state of the vehicle is abnormal power-off and the target vehicle meets the static correction condition, obtaining a static voltage of the target vehicle, and obtaining a static SOC according to the static voltage; The historical SOC is corrected based on the static SOC to obtain a target SOC.

[0007] In one embodiment, when the power-off state of the vehicle is abnormal power-off and the target vehicle meets the static correction condition, obtaining the static voltage of the target vehicle, and obtaining the static SOC according to the static voltage includes: When the power-off state of the vehicle is abnormal, obtaining the current power-on stage; When the current power-on stage is the initial power-on stage, obtaining the current voltage state; When the current voltage state is a preset state, obtaining an SOC calibration condition; When the target vehicle satisfies the SOC calibration condition, determining that the target vehicle satisfies a static correction condition; The static voltage of the target vehicle is obtained, and the static SOC is obtained according to the static voltage.

[0008] In one embodiment, when the target vehicle satisfies the SOC calibration condition, determining that the target vehicle satisfies the static correction condition includes: Acquire a power-on time interval, a time threshold, a historical low-voltage time interval, and a number of starts of the target vehicle based on the SOC calibration condition; When any one of the following conditions is met: the timer state is invalid, the power-on time interval is greater than the time threshold, the historical low-voltage time interval is greater than the time threshold, and the number of target vehicle startups is a preset number, it is determined that the target vehicle meets the SOC calibration condition.

[0009] In one embodiment, the correcting the historical SOC based on the static SOC to obtain the target SOC includes: Comparing the static SOC and the historical SOC to obtain a comparison result; The historical SOC is corrected based on the comparison result to obtain a target SOC.

[0010] In one embodiment, the correcting the historical SOC based on the comparison result to obtain the target SOC includes: When the comparison result is that the historical SOC is greater than the static SOC, taking the static SOC as the target SOC; When the comparison result is that the historical SOC is less than or equal to the static SOC, the historical SOC is used as the target SOC.

[0011] In one embodiment, the acquiring of the timer status and the historical SOC of the target vehicle, and obtaining the vehicle power-off status according to the timer status, includes: Get the timer status and historical SOC of the target vehicle; When the timer state is the first flag, the abnormal power-off is regarded as the vehicle power-off state; When the timer state is a zero flag, normal power-off is regarded as the vehicle power-off state.

[0012] In one embodiment, the step of obtaining the timer status and the historical SOC of the target vehicle, and obtaining the vehicle power-off status according to the timer status, further includes: Acquire a vehicle start signal of a target vehicle, activate a timer of the target vehicle based on the vehicle start signal, and obtain a first flag; When a power-off instruction is detected, the flag bit of the timer is controlled to switch from a first flag bit to a zero flag bit based on the power-off instruction.

[0013] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle SOC correction device, the vehicle SOC correction device comprising: An acquisition module, used to acquire a timer state and a historical SOC of a target vehicle, and obtain a vehicle power-off state according to the timer state; The acquisition module is further used to acquire the static voltage of the target vehicle when the power-off state of the vehicle is abnormal and the target vehicle meets the static correction condition, and obtain the static SOC according to the static voltage; The SOC correction module is used to correct the historical SOC based on the static SOC to obtain a target SOC.

[0014] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle SOC correction device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the vehicle SOC correction method as described above.

[0015] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the vehicle SOC correction method described above are implemented.

[0016] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the vehicle SOC correction method described above are implemented.

[0017] One or more technical solutions proposed in this application have at least the following technical effects: The timer status when the vehicle is started is used to determine whether the vehicle is powered off abnormally. When the power is off abnormally and the static correction conditions are met, a more accurate static SOC is obtained based on the static voltage. The historical SOC at the time of the last power-off is corrected based on the static SOC, so that the SOC value after the abnormal power-off can correct the displayed battery SOC value as much as possible to match the actual battery power. This avoids the electric vehicle not having the power-off SOC stored when it is powered off abnormally, and the mismatch between the displayed SOC and the actual SOC when the vehicle is started again after a long time, which leads to malfunctions during vehicle charging and discharging, and even affects safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A flow chart of the first embodiment of the vehicle SOC correction method of the present application; Figure 2 A complete step diagram for correcting the vehicle SOC according to the static voltage provided in an embodiment of the vehicle SOC correction method of the present application; Figure 3 A flow chart of the second embodiment of the vehicle SOC correction method of the present application; Figure 4 This is a schematic diagram of the module structure of the vehicle SOC correction device according to an embodiment of the present application; Figure 5 Schematic diagram of the device structure of the hardware operating environment involved in the vehicle SOC correction method in the embodiment of the present application. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0022] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The main solution of the embodiment of the present application is: obtaining the timer status and historical SOC of the target vehicle, and obtaining the vehicle power-off status according to the timer status; when the vehicle power-off status is abnormal and the target vehicle meets the static correction condition, obtaining the static voltage of the target vehicle, and obtaining the static SOC according to the static voltage; correcting the historical SOC based on the static SOC to obtain the target SOC.

[0024] In this embodiment, for the convenience of description, the following description is made by taking the identification of the vehicle SOC correction device as the execution subject.

[0025] Due to the existing technology, the current popularization of electric vehicles is increasing. Increasing the popularization of electric vehicles is not only an important measure for my country to achieve green development and low-carbon economy, but also an important way to promote national scientific and technological innovation and enhance international competitiveness. In order to prevent the static correction from being triggered when the polarization reaction of the battery cell does not stop after charging and discharging, causing the soc to be corrected to a value that does not match the actual power, thereby causing the power limit and charging rate limit to deviate from the actual situation.

[0026] There are many limitations in the SOC static correction process, such as: battery aging, temperature correction, different chemical systems, and abnormal power-off (loss of low-voltage power supply) cannot be statically corrected. In practical applications, if the vehicle is stored for a long time and not used, the low-voltage power supply of the entire vehicle is usually disconnected to prevent power loss. When the vehicle is used again, SOC static correction is required due to self-discharge and other reasons. Through SOC static correction, the electric vehicle does not store the power-off SOC when it is abnormally powered off. When the vehicle is restarted after a long time, the displayed SOC does not match the actual SOC, resulting in malfunctions during vehicle charging and discharging, and even affecting safety.

[0027] The present application provides a solution to correct the displayed battery SOC value as much as possible after abnormal power-off, so that it can match the actual battery power.

[0028] It can be seen from the above embodiments that the present application discloses a vehicle SOC correction method, device, equipment and storage medium, which relates to the field of vehicle data processing technology, and discloses: obtaining a timer state and a historical SOC of a target vehicle, and obtaining a vehicle power-off state according to the timer state; when the vehicle power-off state is abnormal power-off and the target vehicle meets a static correction condition, obtaining a static voltage of the target vehicle, and obtaining a static SOC according to the static voltage; correcting the historical SOC based on the static SOC to obtain a target SOC; the method determines whether the vehicle is abnormally powered off by the timer state when the vehicle is started, and for abnormal power-off and meeting the static correction condition, obtains a more accurate static SOC according to the static voltage, and corrects the historical SOC at the last power-off based on the static SOC, so that the SOC value after the abnormal power-off corrects the displayed battery SOC value as much as possible to match the actual battery power, thereby reducing safety risks during vehicle use.

[0029] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a vehicle SOC correction device, etc. The following takes the vehicle SOC correction device as an example to illustrate this embodiment and the following embodiments.

[0030] Based on this, the embodiment of the present application provides a vehicle SOC correction method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the vehicle SOC calibration method of the present application.

[0031] In this embodiment, the vehicle SOC correction method includes steps S10 to S40: Step S10, obtaining the timer status and historical SOC of the target vehicle, and obtaining the vehicle power-off status according to the timer status.

[0032] It is understandable that the timer of the target vehicle may be a timing clock set inside the vehicle, or may be other timing tools.

[0033] It should be understood that the historical SOC may be the SOC of the target vehicle last recorded before starting.

[0034] It should be noted that the timer state may include state 1 and state 0; the vehicle power-off state may include normal power-off and abnormal power-off.

[0035] In a feasible implementation, step S10 may include steps A11 to A13: Step A11, obtaining the timer status and historical SOC of the target vehicle.

[0036] It should be noted that this embodiment can be the first time the target vehicle is started or the vehicle is started after normal use. If the vehicle is started for the first time, there may be no historical SOC, and the historical SOC may be regarded as 0; if the vehicle is started after normal use, the historical SOC can be understood as the SOC last updated when the target vehicle was stopped last time.

[0037] Step A12: when the timer state is the first flag, the abnormal power-off is regarded as the vehicle power-off state.

[0038] It is understandable that the first flag bit of the timer can be understood as an output signal. When the timer output signal is the first flag bit signal, the last time the vehicle was powered off was an abnormal power off.

[0039] It should be understood that for electric vehicles, there may be many reasons for abnormal power loss of the vehicle, such as battery aging, damaged lines resulting in poor contact, charging system failure, controller failure, and excessive motor load.

[0040] Step A13, when the timer state is at the zero flag, normal power-off is regarded as the vehicle power-off state.

[0041] It is understandable that normal power-off can be understood as the user actively or the vehicle automatically shuts down the target vehicle after the user has finished using the target vehicle.

[0042] It should be noted that when the vehicle is powered on, the timer of the electric vehicle automatically maintains the timer state when the vehicle is turned off. At the same time, when the vehicle is turned off normally, the vehicle is controlled to be in the marking position.

[0043] In this embodiment, it is determined whether the vehicle is abnormally powered off by checking the state of the timer when the vehicle is started, so that the SOC of the target vehicle can be further corrected according to the abnormal power off situation.

[0044] The above are only feasible implementations of step S10 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S10.

[0045] It should be emphasized that the step of obtaining the timer status and the historical SOC of the target vehicle and obtaining the vehicle power-off status according to the timer status also includes: A vehicle start signal of the target vehicle is obtained, and a timer of the target vehicle is activated based on the vehicle start signal to obtain a first flag; when a power-off instruction is detected, the flag of the timer is controlled to switch from the first flag to the zero flag based on the power-off instruction.

[0046] Among them, it can be understood that the vehicle start signal can be a signal generated when the user starts the vehicle, or it can be a vehicle start signal generated when the vehicle starts itself based on a pre-set scenario. The pre-set self-start scenario can be customized according to the manufacturer or user's usage requirements, and this embodiment does not limit this.

[0047] Among them, in a specific implementation, when the vehicle is started, the timer of the target vehicle is activated based on the vehicle start signal, and the status of the timer is obtained. It can be understood that the status of the timer at this time is the status when the power is off. If the power is off normally, the timer status is zero flag bit, and if the power is off abnormally, the timer status is the first flag bit; this is because each time the vehicle is started and the timer is activated, the timer status is adjusted to the first flag bit, and when the power is off normally, the timer status is adjusted to the zero flag bit.

[0048] It should be understood that if the power is off abnormally, the timer state will not be adjusted, and the timer state will remain as the first flag bit in the start state. When the vehicle is started again, it can be known from the timer state whether the vehicle was powered off abnormally last time.

[0049] It should be further explained that the SOC change value of the target vehicle is obtained, and when the SOC change value is greater than or equal to a change threshold, the historical SOC is obtained based on the SOC change value.

[0050] The SOC change value can be understood as how much the vehicle SOC decreases or increases when the vehicle is started and used.

[0051] It should be understood that the change threshold may be 1%, 2%, 3%, 5%, etc. of the total power of the electric vehicle, and may be adjusted according to actual conditions.

[0052] It should be noted that when the SOC change of the target vehicle is greater than or equal to the change threshold, the current SOC of the target vehicle recorded by the target vehicle is updated. It is emphasized here that the SOC last updated before power-off is the historical SOC when the target vehicle is started again.

[0053] Step S20, when the power-off state of the vehicle is abnormal power-off and the target vehicle meets the static correction condition, the static voltage of the target vehicle is obtained, and the static SOC is obtained according to the static voltage.

[0054] It should be understood that the static voltage of the target vehicle can be the battery voltage directly measured by a multimeter or other measuring tool when the vehicle is turned off and all electrical loads are turned off. This voltage reflects the charge storage level of the battery under no-load conditions and is a basic indicator for evaluating the health of the battery.

[0055] It should be noted that the static SOC (State of Charge) of an electric vehicle refers to the percentage of the remaining power in the battery relative to the full state of the battery when the vehicle is not charging or discharging, that is, under static conditions. This is an important indicator for evaluating the current state of stored energy in the battery. Although SOC cannot be measured directly, it can be estimated based on the static voltage of the battery. Static voltage refers to the voltage measurement value when there is no external load, the vehicle is not running, and the battery is in an open circuit state. Since the voltage of a battery is related to its state of charge, the voltage of the battery usually changes with changes in SOC.

[0056] It should be emphasized that the static correction of SOC of electric vehicles is generally triggered after the conditions are met during the BMS initialization stage. In order to prevent the static correction from being triggered when the polarization reaction of the battery cell has not stopped after charging and discharging, causing the SOC to be corrected to a value that does not match the actual power, thereby causing the power limit and charging rate limit to deviate from the actual situation, specific conditions may be added to the static correction of SOC, such as: BMS initialization and power-off time of the previous cycle> 1H; invalid reading of SOC storage value during BMS initialization, etc.

[0057] It should be noted that the vehicle's SOC will be updated at intervals. The specific interval can be set according to the interval time or the amount of SOC decrease. For example, the SOC can be updated every 10 minutes, or the SOC can be detected in real time. The SOC displayed on the vehicle will be updated every time the SOC decreases by 5%.

[0058] Step S30: Correct the historical SOC based on the static SOC to obtain a target SOC.

[0059] It can be understood that the target SOC is the value closest to the actual SOC of the target vehicle after correction.

[0060] In a feasible implementation, step S30 may include steps A31-A32: Step A11, comparing the static SOC and the historical SOC to obtain a comparison result.

[0061] It is understandable that the comparison result may include the static SOC being greater than the historical SOC, the static SOC being less than the historical SOC, and the static SOC being equal to the historical SOC.

[0062] Step A12: Correct the historical SOC based on the comparison result to obtain a target SOC.

[0063] It should be noted that the correcting the historical SOC based on the comparison result to obtain the target SOC includes: when the comparison result is that the historical SOC is greater than the static SOC, taking the static SOC as the target SOC; when the comparison result is that the historical SOC is less than or equal to the static SOC, taking the historical SOC as the target SOC.

[0064] In the specific implementation, the complete steps of correcting the vehicle SOC according to the static voltage can be referred to Figure 2 , Figure 2 First, KL15 is controlled to close (i.e., start the vehicle), and then the vehicle controller is used to wake up the vehicle, and the timer is initialized (which can be simply understood as adjusting the timer state to the first flag bit). After the vehicle is started, the internal timer starts timing and stores the vehicle SOC in real time. The vehicle SOC is stored once every 5% change in the vehicle SOC as Asoc (i.e., historical SOC); if the vehicle is not powered by KL30, the vehicle is abnormally powered off at this time; after the vehicle is restarted, KL30 is powered again, and the vehicle controller is initialized. At this time, the controller reads the internal timer of the vehicle. The timer storage value is not 0, and the vehicle is in the abnormal power-off flag bit 1, then the vehicle Asoc is read to determine whether the current vehicle meets the conditions for static correction of the power. If not, Asoc is directly used as the current SOC (i.e., target SOC). If the static correction conditions are met, Csoc is obtained through the static voltage, and Asoc and Csoc are compared. When Asoc is greater than Csoc, Csoc is used as the target SOC; when Asoc is not greater than Csoc, Asoc is used as the target SOC; In this embodiment, through real-time comparison, the SOC estimation deviation caused by various factors (such as temperature change, battery aging, measurement error, etc.) can be discovered and corrected in time, so that the target SOC is closer to the actual state of the battery, thereby improving the accuracy of the entire battery management system.

[0065] The above are only feasible implementations of step S30 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S30.

[0066] The present embodiment provides a vehicle SOC correction method, which determines whether the vehicle is abnormally powered off by the timer status when the vehicle is started, and quickly obtains a more accurate static SOC according to the static voltage when the abnormal power off is met. The historical SOC at the time of the last power off is corrected based on the static SOC, so that the SOC value after the abnormal power off can correct the displayed battery SOC value as much as possible, and can match the actual battery power, so as to avoid the electric vehicle not storing the power-off SOC when it is abnormally powered off, and the vehicle display SOC and the actual SOC not matching when it is started again after a long time, which may cause malfunctions during vehicle charging and discharging, and even affect safety.

[0067] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 2 , step S20, the vehicle SOC correction method further includes steps S21 to S25: Step S21, when the power-off state of the vehicle is abnormal power-off, obtaining the current power-on stage.

[0068] It is understandable that after the vehicle is started, the timer status will be switched to the first flag position. In order to determine the power-off status of the vehicle, this presents a problem. If the timer status has automatically switched to the first flag position after the vehicle starts driving, there is no way to identify whether the target vehicle was at the zero flag position or the first flag position when it was last powered off.

[0069] It should be understood that the current power-on stage can be simply divided into the power-on initial stage and the power-on driving stage, wherein the power-on initial stage can be understood as the first time after the vehicle is powered on, and the timer status judgment is performed based on this time point; the power-on driving stage can be understood as the control stage in which the timer has automatically switched to the first flag position after the vehicle is powered on.

[0070] Step S22, when the current power-on stage is the initial power-on stage, obtaining the current voltage state.

[0071] It is understandable that when the current power-on stage of the target vehicle is the initial power-on stage, the current voltage state needs to be determined.

[0072] It should be understood that the current voltage state may include a plateau region and a non-plateau region.

[0073] It should be noted that the non-platform area usually refers to the area on the battery's voltage-capacity characteristic curve where the change is more obvious. The battery voltage does not change linearly with its state of charge (SOC), but rather presents a specific curve feature.

[0074] It should be emphasized that in the platform area, the battery voltage is relatively stable, and even if the SOC changes, the voltage change is not large. This usually occurs when the battery is close to full charge or close to full discharge. In the platform area, it is difficult to accurately judge the slight change of SOC by voltage alone.

[0075] It should be further emphasized that the non-platform area is the interval where the voltage is more sensitive to changes in SOC. Usually at the beginning of battery charging or the end of battery discharging, the battery voltage reacts significantly to changes in SOC, and the voltage rises or falls faster as SOC increases or decreases.

[0076] Step S23, when the current voltage state is a preset state, obtaining an SOC calibration condition.

[0077] It should be emphasized that static correction of the SOC of electric vehicles should be performed when the voltage is in the non-platform area. This is because the correction is performed at the time point when the battery voltage is sensitive to SOC changes, because the voltage change at this time can more accurately reflect the actual change of SOC. Correction in the non-platform area can obtain a more direct and accurate SOC estimate, thereby improving the overall SOC estimation accuracy. This method uses the rapid change characteristics of the battery voltage, combined with other measurement parameters (such as current, temperature, etc.), to calculate a more accurate battery state of charge through an algorithm.

[0078] It is understandable that the preset state is a non-platform area state.

[0079] It should be noted that the SOC calibration conditions include whether the time interval between power-off and power-on is long enough, whether the historical SOC is valid, whether the historical low voltage duration is long enough, and whether the timer flag is abnormal.

[0080] Step S24, when the target vehicle satisfies the SOC calibration condition, determining that the target vehicle satisfies the static correction condition.

[0081] In a feasible implementation, step S24 may include steps A241-A242: Step A241, based on the SOC calibration condition, obtain the power-on time interval, time threshold, historical low-voltage time interval and number of starts of the target vehicle.

[0082] It is understandable that the power-on time interval may be the time interval between the time point of the last normal power-off / abnormal power-off and the current power-on time point.

[0083] It is understandable that the time threshold may be set as the shortest time value required to update the SOC. The time threshold may be set according to the shortest time for the SOC to change, or may be set according to actual conditions, and this embodiment does not limit this.

[0084] It should be noted that the low-voltage state of an electric vehicle usually refers to the voltage of the electric vehicle's power system (especially the low-voltage auxiliary power supply, such as a 12V lead-acid battery) being lower than the normal operating range, affecting the normal operation of certain functions of the vehicle.

[0085] It should be emphasized that the causes of the low voltage state may include battery aging, insufficient charging, internal battery failure, line connection problems (such as poor contact, short circuit), insufficient charging of the low voltage system by the high voltage system (in a hybrid system with high voltage and low voltage batteries), etc.

[0086] It is understandable that the time interval between the time point when the low-pressure state occurs and the time point when the vehicle is currently started is the historical low-pressure time interval.

[0087] It should be understood that the target vehicle startup number can be used to determine whether the target vehicle is started for the first time. If it is the first time, there is no historical SOC, and the static SOC corresponding to the static voltage is directly used as the target SOC.

[0088] It may also include determining whether the timer flag is valid. If not valid, directly determining the size of the historical SOC and the static SOC, and determining the target SOC based on the comparison result.

[0089] Step A242, when any one of the following conditions is met: the timer state is invalid, the power-on time interval is greater than the time threshold, the historical low-voltage time interval is greater than the time threshold, and the number of target vehicle starts is a preset number, it is determined that the target vehicle meets the SOC calibration condition.

[0090] It is understandable that if any one of the conditions is met, it is considered that the target vehicle meets the SOC calibration condition.

[0091] It should be understood that the preset number of times may be 0, that is, the SOC calibration condition is satisfied if the target vehicle has not been started.

[0092] In this implementation, by setting specific conditions (such as power-on time interval, time threshold, historical low-voltage time interval, and number of starts), the system can selectively perform SOC calibration at the most appropriate time, set precise condition settings and logical judgments, and ensure the timeliness and effectiveness of SOC calibration, thereby improving the overall performance of the electric vehicle.

[0093] The above are only feasible implementations of step S24 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S24.

[0094] Step S25, obtaining the static voltage of the target vehicle, and obtaining the static SOC according to the static voltage.

[0095] It should be noted that the calculation of static SOC can be to construct an OCV-SOC mapping table or model: First, the battery manufacturer experimentally determines the static voltage of the battery at different SOCs to generate an OCV-SOC curve or mapping table. This table or model reflects the relationship between the voltage and the remaining power of the battery when there is no load (i.e., open circuit conditions). Each battery type and batch may be different, so this step is critical to accuracy. When the vehicle is stationary and there is no charging or discharging activity, use a battery management system (BMS) or other measurement tool to accurately measure the open circuit voltage of the battery. Compare the measured static voltage value with the pre-established OCV-SOC mapping table or model. According to the mapping table or model, find the SOC value closest to the measured voltage, or calculate the corresponding SOC through a mathematical model.

[0096] This embodiment provides a vehicle SOC correction method, which can accurately identify the scenarios that really need static correction through multi-level condition screening of abnormal power-off, initial stage of power-on, preset voltage state, etc., and perform targeted calibration, thereby improving the effectiveness and accuracy of calibration.

[0097] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the vehicle SOC correction method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0098] This application also provides a vehicle SOC correction device, please refer to Figure 4 , the vehicle SOC correction device comprises: An acquisition module 10 is used to acquire a timer state and a historical SOC of a target vehicle, and obtain a vehicle power-off state according to the timer state; The acquisition module 10 is further configured to acquire a static voltage of the target vehicle when the vehicle power-off state is abnormal power-off and the target vehicle meets a static correction condition, and obtain a static SOC according to the static voltage; The SOC correction module 20 is used to correct the historical SOC based on the static SOC to obtain a target SOC.

[0099] The vehicle SOC correction device provided by the present application adopts the vehicle SOC correction method in the above embodiment, which can solve the technical problem that the electric vehicle does not store the power-off SOC when it is abnormally powered off, and the vehicle's displayed SOC does not match the actual SOC when it is restarted after a long time, resulting in a malfunction during vehicle charging and discharging that affects safety. Compared with the prior art, the beneficial effects of the vehicle SOC correction device provided by the present application are the same as the beneficial effects of the vehicle SOC correction method provided by the above embodiment, and the other technical features of the vehicle SOC correction device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0100] The present application provides a vehicle SOC correction device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle SOC correction method in the above-mentioned embodiment one.

[0101] Reference below Figure 5 , which shows a schematic diagram of the structure of a vehicle SOC correction device suitable for implementing an embodiment of the present application. The vehicle SOC correction device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The vehicle SOC correction device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0102] like Figure 5As shown, the vehicle SOC correction device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the vehicle SOC correction device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle SOC correction device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a vehicle SOC correction device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or provided instead.

[0103] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0104] The vehicle SOC correction device provided by the present application adopts the vehicle SOC correction method in the above embodiment, which can solve the technical problem that when the electric vehicle is abnormally powered off, the power-off SOC is not stored, and when it is restarted after a long time, the vehicle's displayed SOC does not match the actual SOC, resulting in a malfunction during vehicle charging and discharging that affects safety. Compared with the prior art, the beneficial effects of the vehicle SOC correction device provided by the present application are the same as the beneficial effects of the vehicle SOC correction method provided by the above embodiment, and the other technical features of the vehicle SOC correction device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0105] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0106] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0107] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, the computer-readable program instructions being used to execute the vehicle SOC correction method in the above-mentioned embodiment.

[0108] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM: Random Access Memory), a read-only memory (ROM: Read Only Memory), an erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: Radio Frequency), etc., or any suitable combination of the above.

[0109] The computer-readable storage medium may be included in the vehicle SOC correction device; or may exist independently without being assembled into the vehicle SOC correction device.

[0110] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the vehicle SOC correction device, the vehicle SOC correction device: obtains the timer status and historical SOC of the target vehicle, and obtains the vehicle power-off status according to the timer status; when the vehicle power-off status is abnormal power-off and the target vehicle meets the static correction condition, obtains the static voltage of the target vehicle, and obtains the static SOC according to the static voltage; corrects the historical SOC based on the static SOC to obtain the target SOC.

[0111] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0112] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0113] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0114] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned vehicle SOC correction method, and can solve the technical problem that the electric vehicle does not store the power-off SOC when it is abnormally powered off, and the vehicle's displayed SOC does not match the actual SOC when it is restarted after a long time, resulting in a malfunction during vehicle charging and discharging that affects safety. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the vehicle SOC correction method provided in the above-mentioned embodiment, which will not be repeated here.

[0115] The present application also provides a computer program product, including a computer program, which implements the steps of the vehicle SOC correction method as described above when executed by a processor.

[0116] The computer program product provided by the present application can solve the technical problem that when an electric vehicle is abnormally powered off, the power-off SOC is not stored, and when it is restarted after a long time, the vehicle's displayed SOC does not match the actual SOC, resulting in a malfunction during vehicle charging and discharging that affects safety. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the vehicle SOC correction method provided by the above embodiment, which will not be elaborated here.

[0117] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A vehicle SOC correction method, characterized in that: The vehicle SOC correction method comprises: Obtaining a timer status and a historical SOC of a target vehicle, and obtaining a vehicle power-off status according to the timer status; When the power-off state of the vehicle is abnormal power-off and the target vehicle meets the static correction condition, obtaining a static voltage of the target vehicle, and obtaining a static SOC according to the static voltage; The historical SOC is corrected based on the static SOC to obtain a target SOC.

2. The vehicle SOC correction method according to claim 1, characterized in that: When the vehicle power-off state is abnormal power-off and the target vehicle meets the static correction condition, obtaining the static voltage of the target vehicle, and obtaining the static SOC according to the static voltage, includes: When the power-off state of the vehicle is abnormal, obtaining the current power-on stage; When the current power-on stage is the initial power-on stage, obtaining the current voltage state; When the current voltage state is a preset state, obtaining an SOC calibration condition; When the target vehicle satisfies the SOC calibration condition, determining that the target vehicle satisfies a static correction condition; The static voltage of the target vehicle is obtained, and the static SOC is obtained according to the static voltage.

3. The vehicle SOC correction method according to claim 2, characterized in that: When the target vehicle satisfies the SOC calibration condition, determining that the target vehicle satisfies the static correction condition includes: Acquire a power-on time interval, a time threshold, a historical low-voltage time interval, and a number of starts of the target vehicle based on the SOC calibration condition; When any one of the following conditions is met: the timer state is invalid, the power-on time interval is greater than the time threshold, the historical low-voltage time interval is greater than the time threshold, and the number of target vehicle startups is a preset number, it is determined that the target vehicle meets the SOC calibration condition.

4. The vehicle SOC correction method according to claim 1, characterized in that: The correcting the historical SOC based on the static SOC to obtain a target SOC includes: Comparing the static SOC and the historical SOC to obtain a comparison result; The historical SOC is corrected based on the comparison result to obtain a target SOC.

5. The vehicle SOC correction method according to claim 4, characterized in that: The correcting the historical SOC based on the comparison result to obtain the target SOC includes: When the comparison result is that the historical SOC is greater than the static SOC, taking the static SOC as the target SOC; When the comparison result is that the historical SOC is less than or equal to the static SOC, the historical SOC is used as the target SOC.

6. The vehicle SOC correction method according to claim 1, characterized in that: The step of acquiring a timer state and a historical SOC of the target vehicle and obtaining a vehicle power-off state according to the timer state includes: Get the timer status and historical SOC of the target vehicle; When the timer state is the first flag, the abnormal power-off is regarded as the vehicle power-off state; When the timer state is a zero flag, normal power-off is regarded as the vehicle power-off state.

7. The vehicle SOC correction method according to claim 6, characterized in that: The step of obtaining the timer state and the historical SOC of the target vehicle and obtaining the vehicle power-off state according to the timer state further includes: Acquire a vehicle start signal of a target vehicle, activate a timer of the target vehicle based on the vehicle start signal, and obtain a first flag; When a power-off instruction is detected, the flag bit of the timer is controlled to switch from a first flag bit to a zero flag bit based on the power-off instruction.

8. A vehicle SOC correction device, characterized in that: The vehicle SOC correction device comprises: An acquisition module, used to acquire a timer state and a historical SOC of a target vehicle, and obtain a vehicle power-off state according to the timer state; The acquisition module is further used to acquire the static voltage of the target vehicle when the power-off state of the vehicle is abnormal and the target vehicle meets the static correction condition, and obtain the static SOC according to the static voltage; The SOC correction module is used to correct the historical SOC based on the static SOC to obtain a target SOC.

9. A vehicle SOC correction device, characterized in that: The device comprises: a memory, a processor, and a vehicle SOC correction program stored in the memory and executable on the processor, wherein the vehicle SOC correction program is configured to implement the vehicle SOC correction method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a vehicle SOC correction program, and when the vehicle SOC correction program is executed by the processor, the vehicle SOC correction method according to any one of claims 1 to 7 is implemented.

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