Power battery capacity correction method, storage medium and electronic equipment

Abstract

The invention discloses a power battery capacity correction method, a storage medium and electronic equipment, and the method comprises the steps: responding to the starting of a battery meter display charging correction function, and obtaining vehicle charging data and / or battery energy and driving data; determining a battery meter display charging SOC upper limit according to the vehicle charging data and / or the battery energy consumption data, and controlling the charging upper limit of the battery to be the battery meter display charging SOC upper limit; and if the upper limit of the charging SOC displayed by the battery meter is less than 100%, judging whether the time from the last full charging time of the battery to the current time exceeds a preset time threshold value, and if yes, controlling the upper limit of the charging to be that the battery meter is fully charged. The battery meter display charging SOC upper limit conforming to the battery use condition can be determined, when the battery meter display charging SOC upper limit is smaller than 100%, the battery charging upper limit is controlled to be the battery meter display full electricity at the interval of the preset time threshold value, the battery can be prevented from being fully charged and discharged frequently based on the use habit of a user, the attenuation rate of the battery is delayed, and the service life of the battery is prolonged. And the SOC precision of the battery is corrected while the service life of the battery is prolonged.

Description

Technical Field

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

[0002] The safety of power battery use and life attenuation have always been the core issues in the industry. It is important to set the usage limit of battery cells more reasonably to prevent abuse of battery cells. The current battery capacity management plan sets a fixed real charging upper limit SOC, but as the number of charge and discharge cycles and service life of the battery cells increase, the degradation of the battery cells will become more serious; if the battery continues to be used according to the real charging upper limit SOC set at the beginning of the battery cell after deterioration, the probability of side reactions such as lithium deposition in the battery cell will increase, which may seriously lead to thermal runaway of the battery cell;

[0003] Normally, the optimal upper limit of charging for the life of a battery cell is ≤80% SOC. However, in order to fully utilize the battery's endurance, the industry currently sets the upper limit of charging SOC displayed on the power battery of all electric vehicle users to 100% without distinction. However, frequent full charging and discharging of the battery during use or continuous storage of the battery SOC at a high state is not conducive to the battery life, and this treatment method deteriorates the service life of the battery cell. Summary of the invention

[0004] The purpose of the present application is to overcome the deficiency in the prior art that the upper charging limit SOC displayed by the power battery is fixedly set to 100%, which leads to the deterioration of the service life of the battery cell, and to provide a power battery capacity correction method, storage medium and electronic device that are beneficial to delaying the degradation of the battery cell and extending the battery life.

[0005] The technical solution of the present application provides a method for correcting the capacity of a power battery, comprising:

[0006] In response to the battery meter display charging correction function being activated, obtaining vehicle charging data and / or battery energy and driving data;

[0007] Determine the upper limit of the battery display charging SOC according to the vehicle charging data and / or the battery energy consumption data;

[0008] If the battery meter shows a charging SOC upper limit of less than 100%, in response to the battery charging operation, obtaining the last battery full charging time;

[0009] If the time between the last full charge of the battery and the current time exceeds the preset time threshold, the upper limit of this charge is controlled to be the full charge indicated by the battery meter; otherwise, the upper limit of this charge is controlled to be the charging SOC upper limit indicated by the battery meter.

[0010] Further, the vehicle charging data includes a reference charging number within a recently set time period and a reference deep charging number within a recently set time period;

[0011] The determining of the upper limit of the battery display charging SOC according to the vehicle charging data and / or the battery energy consumption data specifically includes:

[0012] If the reference charging times is greater than or equal to a preset charging times threshold, determining a first correction parameter according to the reference depth charging times divided by the reference charging times;

[0013] The corresponding upper limit of the battery displayed charging SOC is determined according to the interval in which the first correction parameter is located. The larger the first correction parameter is, the larger the corresponding upper limit of the battery displayed charging SOC is.

[0014] Furthermore, the battery energy and driving data include the average power consumption of pure electric driving, the total energy that can be discharged after a full charge, and the accumulated pure electric driving mileage in the most recent set time period;

[0015] The determining of the upper limit of the battery display charging SOC according to the vehicle charging data and / or the battery energy consumption data specifically includes:

[0016] If the reference charging number is less than the preset charging number threshold, a second correction parameter is determined according to the product of the accumulated pure electric driving mileage and the average pure electric driving power consumption divided by the product of the reference charging number and the total energy that can be discharged after full charge;

[0017] The corresponding upper limit of the battery displayed charging SOC is determined according to the interval where the second correction parameter is located. The larger the second correction parameter is, the larger the corresponding upper limit of the battery displayed charging SOC is.

[0018] Furthermore, after determining the upper limit of the battery display charging SOC, the method further includes:

[0019] Determine a charging reminder SOC according to the upper limit of the charging SOC displayed on the battery meter, the larger the upper limit of the charging SOC displayed on the battery meter is, the smaller the charging reminder SOC is;

[0020] When the real-time battery meter displayed SOC is the charging reminder SOC, a charging reminder message is issued.

[0021] Furthermore, the power battery capacity correction method further includes:

[0022] In response to the battery meter display charging correction function being started, a battery meter display charging gear selection window pops up;

[0023] In response to a target battery meter displayed charging gear position input by a user, a battery meter displayed charging SOC upper limit is determined according to the target battery meter displayed charging gear position.

[0024] Furthermore, before the charging correction function is started in response to the battery meter display, the method further includes:

[0025] In response to the battery capacity correction function being started, obtaining a preset battery real SOC lower limit and battery attenuation influence parameters;

[0026] Determine the actual SOC upper limit of the battery according to the battery attenuation influencing parameter;

[0027] The real-time battery displayed SOC is corrected according to the preset battery real SOC lower limit and the battery real SOC upper limit.

[0028] Furthermore, the battery attenuation influencing parameters include vehicle mileage, battery life, battery cell internal resistance growth rate, battery energy loss rate, and battery cell capacity attenuation rate;

[0029] Determining the actual SOC upper limit of the battery according to the battery attenuation influence parameter specifically includes:

[0030] Determining a first SOC upper limit corresponding to the vehicle mileage interval;

[0031] Determine a corresponding second SOC upper limit according to the battery service life interval;

[0032] Determine a corresponding third SOC upper limit according to the interval of the cell internal resistance growth rate;

[0033] Determining a fourth SOC upper limit corresponding to the battery energy loss rate interval;

[0034] Determine a fifth SOC upper limit corresponding to the cell capacity attenuation rate interval;

[0035] A smaller value is selected from the first SOC upper limit, the second SOC upper limit, the third SOC upper limit, the fourth SOC upper limit and the fifth SOC upper limit as the actual SOC upper limit of the battery.

[0036] Furthermore, the correcting of the real-time battery displayed SOC according to the preset battery real SOC lower limit and the battery real SOC upper limit specifically includes:

[0037] Correct the real-time battery meter displayed SOC according to the following formula:

[0038]

[0039] Among them, SOC 表显 Display SOC and SOC for real-time battery 实时 The real SOC of the battery is SOC real上限is the actual SOC upper limit of the battery, SOC real下限 It is the preset lower limit of the actual SOC of the battery.

[0040] The technical solution of the present application also provides a storage medium, which stores computer instructions. When a computer executes the computer instructions, it is used to execute the power battery capacity correction method as described above.

[0041] The technical solution of the present application also provides an electronic device, comprising at least one processor; and

[0042] a memory communicatively connected to the at least one processor; wherein,

[0043] The memory stores instructions that can be executed 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 power battery capacity correction method as described above.

[0044] After adopting the above technical solution, the following beneficial effects are achieved:

[0045] In the present application, the vehicle charging data and / or battery energy and driving data can analyze the battery usage, so as to determine the battery meter displayed charging SOC upper limit that is consistent with the battery usage, control the battery charging upper limit to the battery meter displayed charging SOC upper limit, and when the battery meter displayed charging SOC upper limit is less than 100%, control the battery charging upper limit to the battery meter displayed full charge at each preset time threshold, thereby preventing users from frequently charging and discharging the battery, thereby slowing down the battery degradation rate and extending the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The disclosure of the present application will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In the drawings:

[0047] Figure 1 is a flow chart of a method for correcting power battery capacity in one embodiment of the present application;

[0048] Figure 2 This is a sample table of real-time battery meter SOC corresponding to the same preset battery real SOC lower limit and different battery real charging SOC upper limits;

[0049] Figure 3 This is a flow chart of a method for correcting the capacity of a power battery in a preferred embodiment of the present application;

[0050] Figure 4 This is a flow chart of a method for correcting the capacity of a power battery in another preferred embodiment of the present application;

[0051] Figure 5It is a schematic diagram of the hardware structure of an electronic device in one embodiment of the present application. DETAILED DESCRIPTION

[0052] The specific implementation of the present application is further described below with reference to the accompanying drawings.

[0053] It is easy to understand that according to the technical solution of the present application, without changing the essential spirit of the present application, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the entirety of the present application or as a limitation or restriction on the technical solution of the application.

[0054] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above-mentioned in this application can be understood according to the specific circumstances.

[0056] Power battery capacity correction method:

[0057] The power battery capacity correction method in the embodiment of the present application is as follows: Figure 1 As shown, including:

[0058] Step S101: In response to the battery meter charging correction function being activated, vehicle charging data and / or battery energy and driving data are acquired.

[0059] Step S102: Determine the upper limit of the battery's displayed charging SOC according to the vehicle charging data and / or the battery energy consumption data.

[0060] Step S103: If the upper limit of the charging SOC displayed on the battery meter is less than 100%, in response to the battery charging operation, the last time the battery was fully charged is obtained.

[0061] Step S104: If the time between the last full charge of the battery and the current time exceeds a preset time threshold, the upper limit of this charge is controlled to be the full charge displayed on the battery meter; otherwise, the upper limit of this charge is controlled to be the upper limit of the charging SOC displayed on the battery meter.

[0062] In the embodiment of the present application, the battery meter display charging correction function can be activated by the user. When this function is activated, the current vehicle charging data and / or battery energy and driving data of the vehicle are obtained. Based on the vehicle charging data and / or battery energy and driving data, it is possible to analyze the user's use of the battery, whether it tends to be fully charged and discharged, etc., so as to determine the upper limit of the battery meter display charging SOC according to the vehicle charging data and / or battery energy consumption data. Generally speaking, the more the battery tends to be fully charged and discharged, the larger the upper limit of the battery meter display charging SOC is set to meet the user's usage needs and reduce battery attenuation.

[0063] The upper limit of the SOC displayed on the battery meter is used to limit the upper limit of the battery charging operation. In daily charging operation, the upper limit of the battery charging is controlled to be the upper limit of the SOC displayed on the battery meter. As an example, if the upper limit of the SOC displayed on the battery meter is 95%, in daily charging operation, the charging operation is stopped when the battery meter displays the SOC of 95%.

[0064] Specifically, if the upper limit of the battery meter charging SOC is 100%, the upper limit of each charging operation is the battery meter showing the full charge state. If the upper limit of the battery meter charging SOC is less than 100%, before each battery charging operation, first obtain the time of the last full battery charge, and determine whether the time period from the last full battery charge time to the current time exceeds the preset time threshold. The preset time threshold can be set according to actual conditions, such as one month or two months. If it exceeds, the upper limit of this charging is controlled to be the battery meter showing the full charge state. If it does not exceed, the upper limit of this charging is controlled to be the battery meter showing the charging SOC upper limit.

[0065] As an example, if the preset time threshold is 10 days and the battery meter displayed charging SOC upper limit is 95%, then each time the battery is charged, if the last full charge time of the battery is more than 10 days ago, the charging operation will be stopped when the charging power reaches the battery meter displayed SOC of 100%; if the last full charge time of the battery is no more than 10 days ago, the charging upper limit of this time will be controlled to 95%.

[0066] The embodiment of the present application can analyze the battery usage according to the vehicle charging data and / or the battery energy and driving data, so as to determine the upper limit of the battery meter display charging SOC that meets the battery usage, and control the upper limit of the battery charging to the upper limit of the battery meter display charging SOC, so as to avoid frequent full charging and discharging of the battery. In addition, when the upper limit of the battery meter display charging SOC is less than 100%, the upper limit of the battery charging is controlled to be fully charged at each preset time interval threshold, which can also avoid the battery not being fully charged under the above strategy. The combination of the two strategies plays a role in slowing down the battery attenuation rate and extending the battery life.

[0067] In one embodiment, the vehicle charging data includes a reference charging number within a recent set time period and a reference deep charging number within a recent set time period;

[0068] The upper limit of the battery meter-displayed charging SOC is determined based on the vehicle charging data and / or the battery energy consumption data, including:

[0069] If the reference charging number is greater than or equal to the preset charging number threshold, determining a first correction parameter according to the reference depth charging number divided by the reference charging number;

[0070] The corresponding upper limit of the battery displayed charging SOC is determined according to the interval where the first correction parameter is located. The larger the first correction parameter is, the larger the corresponding upper limit of the battery displayed charging SOC is.

[0071] Specifically, the most recent set time period can be set according to actual conditions, and can be set to the most recent month or two months, etc. The reference charging times are the number of times the battery is charged within the most recent set time period, and the reference depth charging times are the number of times the SOC increase during the battery charging process within the most recent set time period reaches the set increase, and the set increase can be 50% or more.

[0072] When determining the upper limit of the battery-displayed charging SOC, if the reference charging times are greater than or equal to the preset charging times threshold, it is considered that the charging times in the most recent set time period are sufficient to analyze the user's charging habits, and the reference deep charging times are divided by the reference charging times to determine the first correction parameter. The larger the first correction parameter is, the more the user's battery usage habits tend to be fully charged and discharged.

[0073] The first correction parameter is a value of 0-1, which can be divided into at least three intervals, for example, 0-b1, b1-b2, and b2-1, where b1 is less than b2, and each interval is preset with a corresponding battery meter display charging SOC upper limit. As the interval value increases, the corresponding battery meter display charging SOC upper limit also gradually increases. The battery meter display charging SOC upper limit corresponding to the interval where the first correction parameter is located is selected as the current battery meter display charging SOC upper limit.

[0074] In the embodiment of the present application, when the reference charging times are sufficient, the first correction parameter is determined according to the ratio of the reference depth charging times to the reference charging times to reflect the user's battery usage, thereby determining the upper limit of the battery display charging SOC.

[0075] In one embodiment, the battery energy and driving data include the average power consumption of pure electric driving, the total energy that can be discharged after a full charge, and the cumulative pure electric driving mileage in the most recent set time period;

[0076] The upper limit of the battery meter-displayed charging SOC is determined based on the vehicle charging data and / or the battery energy consumption data, including:

[0077] If the reference charging number is less than the preset charging number threshold, the second correction parameter is determined according to the product of the accumulated pure electric driving mileage and the average power consumption of pure electric driving divided by the product of the reference charging number and the total energy that can be discharged after full charge;

[0078] The corresponding upper limit of the battery displayed charging SOC is determined according to the interval in which the second correction parameter is located. The larger the second correction parameter is, the larger the corresponding upper limit of the battery displayed charging SOC is.

[0079] Specifically, the average pure electric driving power consumption is calculated by the vehicle's cumulative pure electric driving power consumption and cumulative pure electric driving mileage, and the total energy that can be released after a full charge is the total energy that can be released after the battery is fully charged based on the current battery status.

[0080] If the reference charging times are less than the preset charging times threshold, it means that the reference charging times in the most recent set time period are insufficient to analyze the user's charging habits, and the user's battery usage habits are analyzed in combination with the average pure electric driving power consumption, the total energy that can be discharged after a full charge, and the cumulative pure electric driving mileage in the most recent set time period. Specifically, the second correction parameter is determined based on the product of the cumulative pure electric driving mileage and the average pure electric driving power consumption divided by the product of the reference charging times and the total energy that can be discharged after a full charge. The larger the second correction parameter, the more inclined the user's battery usage habits are to fully charge and discharge.

[0081] The second correction parameter is a value of 0-1, which can be divided into at least three intervals, such as 0-c1, c1-c2, and c2-1, where c1 is less than c2, and each interval is preset with a corresponding battery meter display charging SOC upper limit. As the interval value increases, the corresponding battery meter display charging SOC upper limit also gradually increases. The battery meter display charging SOC upper limit corresponding to the interval where the second correction parameter is located is selected as the current battery meter display charging SOC upper limit.

[0082] When the reference charging times within the most recent set time period are insufficient to analyze the user's charging habits, the embodiment of the present application analyzes the user's battery usage habits in combination with the average power consumption of pure electric driving, the total energy that can be discharged when fully charged, and the cumulative pure electric driving mileage within the most recent set time period to determine the upper limit of the battery's displayed charging SOC, thereby improving the rationality of setting the upper limit of the battery's displayed charging SOC.

[0083] In one embodiment, after determining the upper limit of the battery display charging SOC, the method further includes:

[0084] The charging reminder SOC is determined according to the upper limit of the charging SOC displayed on the battery meter. The larger the upper limit of the charging SOC displayed on the battery meter is, the smaller the charging reminder SOC is;

[0085] When the real-time battery meter displays the SOC as the charging reminder SOC, a charging reminder message is issued.

[0086] Specifically, for different upper limits of the battery meter-displayed charging SOC, there are corresponding different charging reminder SOCs. When the real-time battery meter-displayed SOC is the charging reminder SOC, the vehicle is controlled to send a charging reminder message to remind the user to charge in time. Each battery meter-displayed charging SOC upper limit is preset with a corresponding charging reminder SOC. The larger the battery meter-displayed charging SOC upper limit, the smaller the corresponding charging reminder SOC. For example, the battery meter-displayed charging SOC upper limits are 90%, 95%, and 100% respectively, then the charging reminder SOC corresponding to 90% is greater than the charging reminder SOC corresponding to 95%, and the charging reminder SOC corresponding to 95% is greater than the charging reminder SOC corresponding to 100%.

[0087] The embodiment of the present application sets a charging reminder SOC corresponding to the upper limit of the charging SOC displayed on the battery meter. The larger the upper limit of the charging SOC displayed on the battery meter, the more the user tends to fully charge and discharge. In order to increase the actual available power of the user, the corresponding charging reminder SOC is set to a smaller value to avoid causing trouble to the user. In this way, the user can be reminded to charge at a reasonable SOC according to the battery charging and discharging habits, thereby improving the battery charging habits and delaying battery degradation.

[0088] In one embodiment, the power battery capacity correction method further includes:

[0089] In response to the battery meter display charging correction function being started, a battery meter display charging gear selection window pops up;

[0090] In response to a target battery meter displayed charging gear position input by a user, a battery meter displayed charging SOC upper limit is determined according to the target battery meter displayed charging gear position.

[0091] In the embodiment of the present application, the upper limit of the battery meter display charging SOC can be manually selected by the user. When the battery meter display charging correction function is activated, a window can be popped up first for the user to select the automatic mode and the manual mode. If the manual mode is selected, a battery meter display charging gear selection window will pop up. The battery meter display charging gear is set to at least three gears, and each gear corresponds to a battery meter display charging SOC upper limit. The battery meter display charging SOC upper limit can be directly determined according to the target battery meter display charging gear input by the user. Preferably, the battery usage habits corresponding to each battery meter display charging gear can be displayed in the battery meter display charging gear selection window so that the user can select the appropriate gear.

[0092] In one embodiment, in response to the battery meter charging correction function being started, the method further includes:

[0093] In response to the battery capacity correction function being started, obtaining a preset battery real SOC lower limit and battery attenuation influence parameters;

[0094] Determine the actual SOC upper limit of the battery based on the battery attenuation influencing parameters;

[0095] The real-time battery displayed SOC is corrected according to the preset battery actual SOC lower limit and battery actual SOC upper limit.

[0096] In the embodiment of the present application, before the battery meter display charge correction, the battery capacity correction function is first started, wherein the lower limit of the battery's actual SOC is a preset value, and the upper limit of the battery's actual SOC will change with the battery's usage time and usage habits, so the current upper limit of the battery's actual SOC is determined by obtaining the battery attenuation influencing parameters, and then the real-time battery meter display SOC is corrected according to the preset battery actual SOC lower limit and battery actual SOC upper limit, so that the battery meter display SOC can more accurately reflect the current battery capacity status.

[0097] Specifically, the parameters affecting battery degradation include vehicle mileage, battery age, battery cell internal resistance growth rate, battery energy loss rate, and battery cell capacity degradation rate;

[0098] The actual SOC upper limit of the battery is determined based on the battery attenuation influencing parameters, including:

[0099] Determine a first SOC upper limit corresponding to the vehicle mileage interval;

[0100] Determine the corresponding second SOC upper limit according to the battery service life interval;

[0101] Determine the corresponding third SOC upper limit according to the range of the cell internal resistance growth rate;

[0102] Determine a fourth SOC upper limit corresponding to the battery energy loss rate interval;

[0103] Determine the corresponding fifth SOC upper limit according to the range of the battery cell capacity attenuation rate;

[0104] A smaller value is selected from the first SOC upper limit, the second SOC upper limit, the third SOC upper limit, the fourth SOC upper limit and the fifth SOC upper limit as the actual SOC upper limit of the battery.

[0105] For vehicle power batteries, vehicle mileage, battery age, cell internal resistance growth rate, battery energy loss rate, and cell capacity attenuation rate will affect battery capacity. Based on the above five battery attenuation influencing parameters, a corresponding SOC upper limit is determined for each parameter, and the smaller value is selected as the current battery real SOC upper limit. The following is an example of determining the first SOC upper limit based on vehicle mileage:

[0106] The vehicle mileage is divided into multiple intervals according to demand, and a corresponding SOC upper limit is preset for each interval. According to the interval where the vehicle mileage is located, the SOC upper limit corresponding to the interval is determined as the first SOC upper limit. Generally speaking, the greater the vehicle mileage, the smaller the corresponding first SOC upper limit.

[0107] The method for determining the SOC upper limit corresponding to the other four battery attenuation influencing parameters is the same as the vehicle mileage. Generally speaking, the greater the battery service life, the battery cell internal resistance growth rate, the battery energy loss rate, and the battery cell capacity attenuation rate, the smaller the corresponding SOC upper limit.

[0108] The embodiment of the present application can correct the current upper limit of the actual SOC of the battery by combining multiple battery attenuation influencing parameters, so that the corrected upper limit of the actual SOC of the battery is more accurate.

[0109] In one embodiment, the real-time battery displayed SOC is corrected according to a preset battery real SOC lower limit and a battery real SOC upper limit, specifically including:

[0110] Correct the real-time battery meter displayed SOC according to the following formula:

[0111]

[0112] Among them, SOC 表显 Display SOC and SOC for real-time battery 实时 The real SOC of the battery, SOC real上限 is the actual SOC upper limit of the battery, SOC real下限 It is the preset lower limit of the actual SOC of the battery.

[0113] In the embodiment of the present application, the preset lower limit of the actual battery SOC is used as 0% of the displayed SOC, the upper limit of the actual battery SOC is used as 100% of the displayed SOC, and the real-time battery displayed SOC is corrected according to the percentile of the real-time battery real SOC between the preset lower limit of the actual battery SOC and the upper limit of the actual battery SOC. Figure 2 A comparison table showing the real-time battery displayed SOC corresponding to some real-time battery actual SOCs when the preset battery actual SOC lower limit and the battery actual SOC upper limit are different values. Taking the data marked in red in the figure as an example, when the preset battery actual SOC lower limit is 5% and the battery actual SOC upper limit is 99%, the real-time battery actual SOC is 97%, and the real-time battery displayed SOC corresponding to the real-time battery actual SOC is 97.9%.

[0114] Figure 3 A flow chart of a power battery capacity correction method in a preferred embodiment of the present application is shown, which specifically includes:

[0115] Step S301: In response to the battery capacity correction function being activated, the preset battery real SOC lower limit and battery attenuation influencing parameters are obtained, and the battery attenuation influencing parameters include vehicle mileage, battery service life, battery cell internal resistance growth rate, battery energy loss rate, and battery cell capacity attenuation rate.

[0116] Step S302: determining the upper limit of the actual SOC of the battery according to the battery attenuation influencing parameter, specifically including:

[0117] Determine a first SOC upper limit corresponding to the vehicle mileage interval;

[0118] Determine the corresponding second SOC upper limit according to the battery service life interval;

[0119] Determine the corresponding third SOC upper limit according to the range of the cell internal resistance growth rate;

[0120] Determine a fourth SOC upper limit corresponding to the battery energy loss rate interval;

[0121] Determine the corresponding fifth SOC upper limit according to the range of the battery cell capacity attenuation rate;

[0122] A smaller value is selected from the first SOC upper limit, the second SOC upper limit, the third SOC upper limit, the fourth SOC upper limit and the fifth SOC upper limit as the actual SOC upper limit of the battery.

[0123] Step S303: Correcting the real-time battery SOC according to the preset battery real SOC lower limit and battery real SOC upper limit, specifically including:

[0124] Correct the real-time battery meter displayed SOC according to the following formula:

[0125]

[0126] Among them, SOC 表显 Display SOC and SOC for real-time battery 实时 The real SOC of the battery is SOC real上限 is the actual SOC upper limit of the battery, SOC real下限 It is the preset lower limit of the actual SOC of the battery.

[0127] Step S304: In response to the battery meter charging correction function being activated, obtaining vehicle charging data and / or battery energy and driving data.

[0128] Step S305: If the reference charging times is greater than or equal to the preset charging times threshold, execute step S306; otherwise, execute step S308.

[0129] Step S306: Determine a first correction parameter according to the reference depth charging times divided by the reference charging times.

[0130] Step S307: Determine the corresponding upper limit of the battery's displayed charging SOC according to the interval in which the first correction parameter is located. The larger the first correction parameter is, the larger the corresponding upper limit of the battery's displayed charging SOC is.

[0131] Step S308: Determine the second correction parameter according to the product of the accumulated pure electric driving mileage and the average pure electric driving power consumption divided by the product of the reference charging times and the total energy that can be discharged after a full charge.

[0132] Step S309: Determine the corresponding upper limit of the battery's displayed charging SOC according to the interval of the second correction parameter. The larger the second correction parameter is, the larger the corresponding upper limit of the battery's displayed charging SOC is.

[0133] Step S310: If the upper limit of the charging SOC displayed by the battery meter is less than 100%, then execute step S311, otherwise execute step S312.

[0134] Step S311: In response to the battery charging operation, the last time the battery was fully charged is obtained. If the time from the last time the battery was fully charged to the current time exceeds a preset time threshold, the upper limit of this charging is controlled to be full charge as indicated by the battery meter.

[0135] Step S312: In response to the battery charging operation, the current charging upper limit is controlled to be the battery meter displayed charging SOC upper limit.

[0136] Step S313: Determine the charging reminder SOC according to the upper limit of the charging SOC displayed on the battery meter. When the real-time SOC displayed on the battery meter is the charging reminder SOC, send a charging reminder message. The larger the upper limit of the charging SOC displayed on the battery meter, the smaller the charging reminder SOC.

[0137] Figure 4A flow chart of a method for correcting the capacity of a power battery in another preferred embodiment of the present application is shown, which specifically includes:

[0138] Step S401: In response to the battery capacity correction function being activated, the preset battery real SOC lower limit and battery attenuation influencing parameters are obtained, and the battery attenuation influencing parameters include vehicle mileage, battery service life, battery cell internal resistance growth rate, battery energy loss rate, and battery cell capacity attenuation rate.

[0139] Step S402: determining the upper limit of the actual SOC of the battery according to the battery attenuation influence parameter, specifically including:

[0140] Determine a first SOC upper limit corresponding to the vehicle mileage interval;

[0141] Determine the corresponding second SOC upper limit according to the battery service life interval;

[0142] Determine the corresponding third SOC upper limit according to the range of the cell internal resistance growth rate;

[0143] Determine a fourth SOC upper limit corresponding to the battery energy loss rate interval;

[0144] Determine the corresponding fifth SOC upper limit according to the range of the battery cell capacity attenuation rate;

[0145] A smaller value is selected from the first SOC upper limit, the second SOC upper limit, the third SOC upper limit, the fourth SOC upper limit and the fifth SOC upper limit as the actual SOC upper limit of the battery.

[0146] Step S403: Correcting the real-time battery SOC according to the preset battery real SOC lower limit and battery real SOC upper limit, specifically including:

[0147] Correct the real-time battery meter displayed SOC according to the following formula:

[0148]

[0149] Among them, SOC 表显 Display SOC and SOC for real-time battery 实时 The real SOC of the battery, SOC real上限 is the actual SOC upper limit of the battery, SOC real下限 It is the preset lower limit of the actual SOC of the battery.

[0150] Step S404: In response to the battery meter display charging correction function being activated, a battery meter display charging gear selection window pops up.

[0151] Step S405: In response to the target battery meter displayed charging gear input by the user, the battery meter displayed charging SOC upper limit is determined according to the target battery meter displayed charging gear.

[0152] Step S406: If the upper limit of the charging SOC displayed by the battery meter is less than 100%, then execute step S407; otherwise, execute step S408.

[0153] Step S407: In response to the battery charging operation, the last time the battery was fully charged is obtained. If the time from the last time the battery was fully charged to the current time exceeds a preset time threshold, the upper limit of this charging is controlled to be full charge as indicated by the battery meter.

[0154] Step S408: In response to the battery charging operation, the current charging upper limit is controlled to be the battery meter displayed charging SOC upper limit.

[0155] Step S409: Determine the charging reminder SOC according to the upper limit of the charging SOC displayed on the battery meter. When the real-time SOC displayed on the battery meter is the charging reminder SOC, send a charging reminder message. The larger the upper limit of the charging SOC displayed on the battery meter, the smaller the charging reminder SOC.

[0156] The technical solution of the present application also provides a storage medium, which stores computer instructions. When a computer executes the computer instructions, it is used to execute the power battery capacity correction method in any of the aforementioned embodiments.

[0157] Figure 5 An electronic device of the present application is shown, comprising:

[0158] at least one processor 501; and,

[0159] A memory 502 is communicatively connected to the at least one processor 501; wherein,

[0160] The memory 502 stores instructions that can be executed by the at least one processor 501, and the instructions are executed by the at least one processor 501 so that the at least one processor 501 can execute all steps of the power battery capacity correction method in any of the aforementioned method embodiments.

[0161] The electronic device is preferably an on-board electronic control unit (ECU), and further a microcontroller unit (MCU) in the on-board electronic control unit.

[0162] Figure 5 Take a processor 501 as an example:

[0163] The electronic device may further include: an input device 503 and an output device 504 .

[0164] The processor 501, the memory 502, the input device 503 and the output device 504 may be connected via a bus or other means, and the figure takes the connection via a bus as an example.

[0165] The memory 502 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the power battery capacity correction method in the embodiment of the present application, for example, Figure 1 , 3 4. The processor 501 executes various functional applications and data processing by running the non-volatile software programs, instructions and modules stored in the memory 502, that is, the power battery capacity correction method in the above embodiment is implemented.

[0166] The memory 502 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and applications required by at least one function; the data storage area may store data created according to the use of the power battery capacity correction method, etc. In addition, the memory 502 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 502 may optionally include a memory remotely arranged relative to the processor 501, and these remote memories may be connected to a device for executing the power battery capacity correction method via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0167] The input device 503 can receive user clicks and generate signal inputs related to user settings and function control of the power battery capacity correction method. The output device 504 can include display devices such as display screens.

[0168] The one or more modules are stored in the memory 502 , and when executed by the one or more processors 501 , the power battery capacity correction method in any of the above method embodiments is executed.

[0169] The above description is only the principle and preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this field, the implementation methods obtained by appropriately combining the technical solutions disclosed in different embodiments are also included in the technical scope of the present invention. On the basis of the principle of the present application, several other variations can be made, which should also be regarded as the protection scope of the present application.

Claims

1. A method for correcting the capacity of a power battery, characterized in that: include: In response to the battery meter display charging correction function being activated, obtaining vehicle charging data and / or battery energy and driving data; Determine the upper limit of the battery display charging SOC according to the vehicle charging data and / or the battery energy consumption data; If the battery meter shows a charging SOC upper limit of less than 100%, in response to the battery charging operation, obtaining the last battery full charging time; If the time between the last full charge of the battery and the current time exceeds the preset time threshold, the upper limit of this charge is controlled to be the full charge indicated by the battery meter; otherwise, the upper limit of this charge is controlled to be the charging SOC upper limit indicated by the battery meter.

2. The power battery capacity correction method according to claim 1, characterized in that: The vehicle charging data includes a reference charging number within a recently set time period and a reference deep charging number within a recently set time period; The determining of the upper limit of the battery display charging SOC according to the vehicle charging data and / or the battery energy consumption data specifically includes: If the reference charging times is greater than or equal to a preset charging times threshold, determining a first correction parameter according to the reference depth charging times divided by the reference charging times; The corresponding upper limit of the battery displayed charging SOC is determined according to the interval in which the first correction parameter is located. The larger the first correction parameter is, the larger the corresponding upper limit of the battery displayed charging SOC is.

3. The power battery capacity correction method according to claim 2, characterized in that: The battery energy and driving data include the average power consumption of pure electric driving, the total energy that can be discharged after a full charge, and the cumulative pure electric driving mileage in the most recent set time period; The determining of the upper limit of the battery display charging SOC according to the vehicle charging data and / or the battery energy consumption data specifically includes: If the reference charging number is less than the preset charging number threshold, a second correction parameter is determined according to the product of the accumulated pure electric driving mileage and the average pure electric driving power consumption divided by the product of the reference charging number and the total energy that can be discharged after full charge; The corresponding upper limit of the battery displayed charging SOC is determined according to the interval where the second correction parameter is located. The larger the second correction parameter is, the larger the corresponding upper limit of the battery displayed charging SOC is.

4. The power battery capacity correction method according to claim 1, characterized in that: After determining the upper limit of the battery display charging SOC, the method further includes: Determine a charging reminder SOC according to the upper limit of the charging SOC displayed on the battery meter, the larger the upper limit of the charging SOC displayed on the battery meter is, the smaller the charging reminder SOC is; When the real-time battery meter displayed SOC is the charging reminder SOC, a charging reminder message is issued.

5. The power battery capacity correction method according to claim 1, characterized in that: Also includes: In response to the battery meter display charging correction function being started, a battery meter display charging gear selection window pops up; In response to a target battery meter displayed charging gear position input by a user, a battery meter displayed charging SOC upper limit is determined according to the target battery meter displayed charging gear position.

6. The power battery capacity correction method according to any one of claims 1 to 5, characterized in that: Before the charging correction function is started in response to the battery meter, the method further includes: In response to the battery capacity correction function being started, obtaining a preset battery real SOC lower limit and battery attenuation influence parameters; Determine the actual SOC upper limit of the battery according to the battery attenuation influencing parameter; The real-time battery displayed SOC is corrected according to the preset battery real SOC lower limit and the battery real SOC upper limit.

7. The power battery capacity correction method according to claim 6, characterized in that: The battery attenuation influencing parameters include vehicle mileage, battery life, battery cell internal resistance growth rate, battery energy loss rate, and battery cell capacity attenuation rate; Determining the actual SOC upper limit of the battery according to the battery attenuation influence parameter specifically includes: Determining a first SOC upper limit corresponding to the vehicle mileage interval; Determine a corresponding second SOC upper limit according to the battery service life interval; Determine a corresponding third SOC upper limit according to the interval of the cell internal resistance growth rate; Determining a fourth SOC upper limit corresponding to the battery energy loss rate interval; Determine a fifth SOC upper limit corresponding to the cell capacity attenuation rate interval; A smaller value is selected from the first SOC upper limit, the second SOC upper limit, the third SOC upper limit, the fourth SOC upper limit and the fifth SOC upper limit as the actual SOC upper limit of the battery.

8. The power battery capacity correction method according to claim 6, characterized in that: The correcting the real-time battery displayed SOC according to the preset battery real SOC lower limit and the battery real SOC upper limit specifically includes: Correct the real-time battery meter displayed SOC according to the following formula: Among them, SOC 表显 Display SOC and SOC for real-time battery 实时 The real SOC of the battery is SOC real上限 is the actual SOC upper limit of the battery, SOC real下限 It is the preset lower limit of the actual SOC of the battery.

9. A storage medium, characterized in that: The storage medium stores computer instructions, and when a computer executes the computer instructions, it is used to execute the power battery capacity correction method according to any one of claims 1 to 8.

10. An electronic device, characterized in that: comprising at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed 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 power battery capacity correction method as described in any one of claims 1-8.

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