Power battery capacity correction method, storage medium and electronic device

Abstract

The application discloses a power battery capacity correction method, a storage medium and an electronic device. The method comprises the following steps: in response to the starting of a battery apparent charging correction function, acquiring vehicle charging data and / or battery energy and driving data; determining a battery apparent charging SOC upper limit according to the vehicle charging data and / or battery energy consumption data, and controlling the charging upper limit of the battery to be the battery apparent charging SOC upper limit; if the battery apparent charging SOC upper limit is less than 100%, judging whether the last battery full charging time is more than a preset time threshold from the current time, and if yes, controlling the current charging upper limit to be the battery apparent full charge. In the application, the battery apparent charging SOC upper limit conforming to the battery use condition can be determined, and when the battery apparent charging SOC upper limit is less than 100%, the battery charging upper limit is controlled to be the battery apparent full charge every interval of the preset time threshold, so that the battery can be prevented from being frequently fully charged and discharged based on the user use habit, the rate of battery attenuation is delayed, the battery life is prolonged, and the battery SOC precision is corrected.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a power battery capacity correction method, storage medium, and electronic device. Background Technology

[0002] The safety and lifespan degradation of power batteries have always been the most critical issues in the industry. Setting more reasonable usage boundaries for battery cells to prevent abuse is a crucial step. Current battery capacity management schemes set a fixed upper limit for true charging (SOC). However, as the number of charge-discharge cycles and the years of use increase, cell degradation becomes more severe. Continuing to use a degraded battery at its initial SOC will increase the probability of side reactions such as lithium plating, potentially leading to thermal runaway.

[0003] Typically, the optimal charging limit for battery cell lifespan is ≤80% of the State of Charge (SOC). However, in order to fully utilize the battery's range, the industry indiscriminately sets the indicated SOC of all electric vehicle users' power batteries to 100%. But frequent full charging and discharging or maintaining the battery's SOC at a high level during use is detrimental to battery life, and this approach worsens the lifespan of the battery cells. Summary of the Invention

[0004] The purpose of this application is to overcome the shortcomings of the prior art in which the displayed charging upper limit SOC of the power battery is fixed at 100%, which leads to the deterioration of the cell life. It provides a power battery capacity correction method, storage medium and electronic device that can help delay cell degradation and extend battery life.

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

[0006] In response to the activation of the battery display charging correction function, vehicle charging data and / or battery energy and driving data are acquired.

[0007] The upper limit of the battery's displayed SOC is determined based on the vehicle charging data and / or the battery energy consumption data.

[0008] If the battery's displayed SOC limit is less than 100%, then in response to the battery charging operation, the last time the battery was fully charged is obtained.

[0009] If the time since the last full charge exceeds a preset time threshold, the maximum charge limit for this charge will be set to the battery's displayed full charge; otherwise, the maximum charge limit will be set to the battery's displayed SOC limit.

[0010] Furthermore, the vehicle charging data includes the reference number of charging times within the most recent set time period and the reference deep charging times within the most recent set time period;

[0011] The step of determining the upper limit of the battery's displayed state of charge (SOC) based on the vehicle charging data and / or the battery energy consumption data specifically includes:

[0012] If the reference charging count is greater than or equal to the preset charging count threshold, then the first correction parameter is determined by dividing the reference depth charging count by the reference charging count.

[0013] Based on the range in which the first correction parameter is located, the corresponding upper limit of the battery's displayed charging SOC is determined. The larger the first correction parameter is, the larger the corresponding upper limit of the battery's displayed charging SOC is.

[0014] Furthermore, the battery energy and driving data include the average energy consumption during pure electric driving, the total energy that can be discharged when fully charged, and the cumulative pure electric driving mileage within the most recently set time period;

[0015] The step of determining the upper limit of the battery's displayed state of charge (SOC) based on the vehicle charging data and / or the battery energy consumption data specifically includes:

[0016] If the reference number of charging times is less than the preset charging number threshold, then the second correction parameter is determined by dividing the product of the cumulative pure electric driving mileage and the average pure electric driving power consumption by the product of the reference number of charging times and the total energy that can be discharged when fully charged.

[0017] Based on the range of the second correction parameter, the corresponding upper limit of the battery's displayed charging SOC is determined. The larger the second correction parameter is, the larger the corresponding upper limit of the battery's displayed charging SOC is.

[0018] Furthermore, after determining the upper limit of the battery's displayed state of charge (SOC), the process also includes:

[0019] The charging reminder SOC is determined based on the upper limit of the battery's displayed charging SOC. The larger the upper limit of the battery's displayed charging SOC, the smaller the charging reminder SOC.

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

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

[0022] In response to the activation of the battery display charging correction function, a window for selecting the battery display charging level pops up.

[0023] In response to the user's input of the target battery charging level, the upper limit of the battery's displayed SOC is determined based on the target battery charging level.

[0024] Furthermore, the response prior to the activation of the battery display charging correction function also includes:

[0025] In response to the activation of the battery capacity correction function, the preset lower limit of the actual SOC of the battery and parameters affecting battery degradation are obtained;

[0026] The upper limit of the battery's true SOC is determined based on the battery degradation impact parameters.

[0027] The real-time battery SOC is corrected based on the preset lower limit of the actual battery SOC and the upper limit of the actual battery SOC.

[0028] Furthermore, the parameters affecting battery degradation include vehicle mileage, battery life, cell internal resistance growth rate, battery energy loss rate, and cell capacity degradation rate.

[0029] The step of determining the upper limit of the battery's true SOC based on the battery degradation impact parameters specifically includes:

[0030] The corresponding first SOC upper limit is determined based on the range in which the vehicle travels;

[0031] The corresponding second SOC upper limit is determined based on the range of battery service life;

[0032] The corresponding third SOC upper limit is determined based on the range in which the cell internal resistance growth rate falls.

[0033] The corresponding fourth SOC upper limit is determined based on the range of the battery energy loss rate.

[0034] The corresponding fifth SOC upper limit is determined based on the range of the cell capacity decay rate.

[0035] The smaller value among 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 is selected as the actual SOC upper limit of the battery.

[0036] Furthermore, the step of correcting the real-time battery SOC display based on the preset lower limit of the actual battery SOC and the upper limit of the actual battery SOC specifically includes:

[0037] The real-time battery SOC display should be corrected according to the following formula:

[0038]

[0039] Among them, SOC 表显 For real-time battery display SOC, SOC 实时 For real-time battery true SOC, SOC real上限This represents the actual upper limit of the battery's SOC (State of Charge). real下限 This is a preset lower limit for the actual state of charge (SOC) of the battery.

[0040] The technical solution of this application also provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform the power battery capacity correction method as described above.

[0041] The technical solution of this application also provides an electronic device, including 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, which enables the at least one processor to perform the power battery capacity correction method as described above.

[0044] The above technical solution has the following beneficial effects:

[0045] In this application, vehicle charging data and / or battery energy and driving data can be analyzed to determine the battery's displayed SOC upper limit that matches the battery's usage. The upper limit of battery charging is controlled to be the upper limit of the displayed SOC. When the upper limit of the displayed SOC is less than 100%, a preset time threshold is used to control the upper limit of battery charging to be the battery's displayed full charge. This can prevent users from frequently charging and discharging the battery, thereby slowing down the rate of battery degradation and extending battery life. Attached Figure Description

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

[0047] Figure 1 This is a flowchart of a power battery capacity correction method in one embodiment of this application;

[0048] Figure 2 This is a table of real-time battery SOC display examples corresponding to the same preset lower limit of actual SOC and different upper limits of actual charging SOC of actual batteries.

[0049] Figure 3 This is a flowchart of a preferred embodiment of the power battery capacity correction method in this application;

[0050] Figure 4 This is a flowchart of a power battery capacity correction method in another preferred embodiment of this application;

[0051] Figure 5This is a schematic diagram of the hardware structure of an electronic device in one embodiment of this application. Detailed Implementation

[0052] The specific embodiments of this application will be further described below with reference to the accompanying drawings.

[0053] It is readily understood that, based on the technical solution of this application, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this application. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this application and should not be considered as the entirety of this application or as limitations or restrictions on the technical solution of the application.

[0054] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meanings of the above in this application according to the specific circumstances.

[0056] Methods for correcting the capacity of power batteries:

[0057] The power battery capacity correction method in the embodiments of this application, such as Figure 1 As shown, it includes:

[0058] Step S101: In response to the activation of the battery display charging correction function, acquire vehicle charging data and / or battery energy and driving data.

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

[0060] Step S103: If the battery's displayed SOC limit is less than 100%, then in response to the battery charging operation, obtain the last time the battery was fully charged.

[0061] Step S104: If the time since the last full charge of the battery exceeds a preset time threshold, then the upper limit of this charge is controlled to be the battery display showing a full charge; otherwise, the upper limit of this charge is controlled to be the battery display showing a SOC upper limit.

[0062] In this embodiment, the battery charging correction function can be activated by the user. When activated, it acquires the vehicle's current charging data and / or battery energy and driving data. Based on the vehicle charging data and / or battery energy and driving data, the user's battery usage patterns can be analyzed, such as whether the battery tends to be fully charged and discharged. Therefore, the upper limit of the battery's displayed State of Charge (SOC) is determined based on the vehicle charging data and / or battery energy consumption data. Generally, the more the battery tends to be fully charged and discharged, the higher the upper limit of the battery's displayed SOC is set, in order to meet user needs and reduce battery degradation.

[0063] The battery's displayed SOC (State of Charge) limit is used to restrict the maximum charging capacity during battery charging operations. In daily charging, this limit is maintained at the battery's displayed SOC. For example, if the battery's displayed SOC is 95%, then during daily charging, charging will stop when the battery reaches 95% of its displayed SOC.

[0064] Specifically, if the battery's displayed SOC (State of Charge) is 100%, then the maximum charging limit for each charging operation is the battery's displayed full charge state. If the battery's displayed SOC is less than 100%, then before each charging operation, the last full charge time is retrieved, and it is determined whether the time interval between the last full charge time and the current time exceeds a 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 threshold, the maximum charging limit for this operation is controlled to be the battery's displayed full charge state; if it does not exceed the threshold, the maximum charging limit for this operation is controlled to be the battery's displayed SOC.

[0065] As an example, if the preset time threshold is 10 days and the battery's displayed SOC is 95%, then each time the battery is charged, if the last time the battery was fully charged was more than 10 days ago, the charging operation will stop when the battery's displayed SOC reaches 100%; if the last time the battery was fully charged was less than 10 days ago, the charging limit for this charge will be controlled to 95%.

[0066] This application embodiment can analyze battery usage based on vehicle charging data and / or battery energy and driving data to determine the upper limit of the battery's displayed state of charge (SOC) that matches the battery's usage. The upper limit of battery charging is controlled to be the upper limit of the displayed SOC, avoiding frequent full-charge and discharge cycles. Furthermore, when the upper limit of the displayed SOC is less than 100%, a preset time threshold is used to control the upper limit of battery charging to the displayed full charge. This also prevents the battery from never being fully charged under the above strategy. The combination of these two strategies slows down the battery degradation rate and extends battery life.

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

[0068] The upper limit of the battery's displayed state of charge (SOC) is determined based on vehicle charging data and / or battery energy consumption data, specifically including:

[0069] If the reference number of charging times is greater than or equal to the preset charging time threshold, the first correction parameter is determined by dividing the reference depth charging time by the reference charging time.

[0070] Based on the range in which the first correction parameter is located, the corresponding upper limit of the battery's displayed charging SOC is determined. The larger the first correction parameter is, the larger the corresponding upper limit of the battery's displayed charging SOC is.

[0071] Specifically, the recent set time period can be set according to actual conditions, such as the last month or two months. The reference charging count is the number of times the battery has been charged within the recent set time period, and the reference deep charging count is the number of times the battery's SOC increase reaches the set increase amount during charging within the recent set time period. The set increase amount can be 50% or more.

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

[0073] The first correction parameter is a value between 0 and 1, which can be divided into at least three intervals, such as 0-b1, b1-b2, and b2-1, where b1 is less than b2. Each interval has a preset upper limit for the battery's displayed charging SOC. As the interval value increases, the corresponding upper limit for the battery's displayed charging SOC also gradually increases. The upper limit for the battery's displayed charging SOC corresponding to the interval containing the first correction parameter is selected as the current upper limit for the battery's displayed charging SOC.

[0074] In this embodiment of the application, when there are a sufficient number of reference charging cycles, a first correction parameter is determined based on the ratio of the number of reference deep charging cycles to the total number of reference charging cycles, so as to reflect the user's battery usage and thus determine the upper limit of the battery's displayed SOC.

[0075] In one embodiment, battery energy and driving data include average energy consumption during pure electric driving, total energy that can be discharged when fully charged, and cumulative pure electric driving mileage within the most recent set time period;

[0076] The upper limit of the battery's displayed state of charge (SOC) is determined based on vehicle charging data and / or battery energy consumption data, specifically including:

[0077] If the reference number of charging times is less than the preset charging time threshold, the second correction parameter is determined by dividing the product of the cumulative pure electric driving mileage and the average pure electric driving energy consumption by the product of the reference number of charging times and the total energy that can be discharged when fully charged.

[0078] Based on the range of the second correction parameter, the corresponding upper limit of the battery's displayed charging SOC is determined. The larger the second correction parameter is, the larger the corresponding upper limit of the battery's displayed charging SOC is.

[0079] Specifically, the average energy consumption for pure electric driving is calculated from the vehicle's cumulative pure electric driving energy consumption and cumulative pure electric driving mileage, and the total energy that can be released after a full charge is the total energy that the battery can release after a full charge based on the current battery state.

[0080] If the number of reference charging cycles is less than the preset charging cycle threshold, it means that the number of reference charging cycles in the most recent set time period is insufficient to analyze the user's charging habits. In this case, the user's battery usage habits are analyzed by combining the average pure electric driving energy consumption, the total energy that can be discharged at full charge, and the cumulative pure electric driving mileage in the most recent set time period. Specifically, the second correction parameter is determined by dividing the product of the cumulative pure electric driving mileage and the average pure electric driving energy consumption by the product of the number of reference charging cycles and the total energy that can be discharged at full charge. The larger the second correction parameter, the more the user's battery usage habits tend to be full charge and discharge.

[0081] The second correction parameter is a value between 0 and 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. Each interval has a preset upper limit for the battery's displayed charging SOC. As the interval value increases, the corresponding upper limit for the battery's displayed charging SOC also gradually increases. The upper limit for the battery's displayed charging SOC corresponding to the interval containing the second correction parameter is selected as the current upper limit for the battery's displayed charging SOC.

[0082] In this embodiment of the application, when the number of reference charging times within the most recently set time period is insufficient to analyze the user's charging habits, the user's battery usage habits are analyzed by combining the average pure electric driving power consumption, the total energy that can be discharged when fully charged, and the cumulative pure electric driving mileage within the most recently set time period, so as to determine the upper limit of the battery's displayed charging SOC, thereby improving the rationality of the battery's displayed charging SOC upper limit setting.

[0083] In one embodiment, after determining the upper limit of the battery's displayed state of charge (SOC), the method further includes:

[0084] The charging reminder SOC is determined based on the upper limit of the battery's displayed charging SOC. The higher the upper limit of the battery's displayed charging SOC, the lower the charging reminder SOC.

[0085] When the real-time battery display shows a SOC of "charging reminder SOC", a charging reminder message will be sent.

[0086] Specifically, different battery indicator SOC (State of Charge) limits correspond to different charging reminder SOCs. When the real-time battery indicator SOC is at the charging reminder SOC, the vehicle sends a charging reminder message to remind the user to charge in time. Each battery indicator SOC limit has a preset corresponding charging reminder SOC; the higher the battery indicator SOC limit, the lower the corresponding charging reminder SOC. For example, if the battery indicator SOC limits are 90%, 95%, and 100%, then the charging reminder SOC for 90% is greater than that for 95%, and the charging reminder SOC for 95% is greater than that for 100%.

[0087] In this embodiment, a charging reminder SOC is set for each battery's displayed charging SOC upper limit. The higher the displayed charging SOC upper limit, the more the user tends to fully charge and discharge the battery. In order to increase the actual usable power of the user, the corresponding charging reminder SOC is set to be smaller to avoid causing trouble for the user. This allows the user to be reminded to charge at a reasonable SOC based on the battery's charging and discharging habits, thereby improving battery charging habits and delaying battery degradation.

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

[0089] In response to the activation of the battery display charging correction function, a window for selecting the battery display charging level pops up.

[0090] In response to the user's input of the target battery charging level, determine the upper limit of the battery's displayed SOC based on the target battery charging level.

[0091] In this embodiment, the upper limit of the battery's displayed charging SOC can be manually selected by the user. When the battery's displayed charging correction function is activated, a pop-up window allows the user to select between automatic and manual modes. If manual mode is selected, a battery display charging level selection window pops up. At least three battery display charging levels are set, each corresponding to a battery display charging SOC upper limit. The upper limit of the battery display charging SOC can be directly determined based on the user's input target battery display charging level. Preferably, the battery usage habits corresponding to each battery display charging level can be displayed in the battery display charging level selection window to facilitate the user's selection of the appropriate level.

[0092] In one embodiment, prior to the activation of the battery display charging correction function, the method further includes:

[0093] In response to the activation of the battery capacity correction function, the preset lower limit of the actual SOC of the battery and parameters affecting battery degradation are obtained;

[0094] Determine the upper limit of the battery's true SOC based on parameters affecting battery degradation;

[0095] The real-time battery SOC is adjusted based on the preset lower limit and upper limit of the actual battery SOC.

[0096] In this embodiment, before correcting the battery display charging, the battery capacity correction function is activated first. The lower limit of the battery's true SOC is a preset value, and the upper limit of the battery's true SOC will change with the battery's usage time and usage habits. Therefore, the current upper limit of the battery's true SOC is determined by obtaining the battery degradation impact parameters. Then, the real-time battery display SOC is corrected according to the preset lower limit and upper limit of the battery's true SOC, so that the battery display SOC can more accurately reflect the current battery capacity status.

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

[0098] The actual SOC upper limit of the battery is determined based on parameters affecting battery degradation, specifically including:

[0099] The first SOC upper limit is determined based on the range in which the vehicle travels;

[0100] The corresponding second SOC upper limit is determined based on the range of battery lifespan.

[0101] The corresponding third SOC upper limit is determined based on the range in which the cell internal resistance growth rate falls.

[0102] The corresponding fourth SOC upper limit is determined based on the range of battery energy loss rate.

[0103] The corresponding fifth SOC upper limit is determined based on the range of cell capacity decay rate.

[0104] The smaller value among 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 is selected as the actual SOC upper limit of the battery.

[0105] For vehicle power batteries, vehicle mileage, battery life, cell internal resistance growth rate, battery energy loss rate, and cell capacity degradation rate all affect battery capacity. Based on these five parameters affecting battery degradation, a corresponding SOC upper limit is determined for each parameter, and the smaller value is selected as the current true SOC upper limit of the battery. The following explanation uses the method of determining the first SOC upper limit based on vehicle mileage as an example:

[0106] Based on requirements, the vehicle's mileage is divided into multiple intervals, each with a pre-defined SOC (State of Charge) upper limit. The SOC upper limit for each interval is determined based on the vehicle's mileage, serving as the first SOC upper limit. Generally, the larger the vehicle's mileage, the smaller the corresponding first SOC upper limit.

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

[0108] The embodiments of this application can combine multiple battery degradation influence parameters to correct the current battery true SOC upper limit, making the corrected battery true SOC upper limit more accurate.

[0109] In one embodiment, the real-time battery SOC is corrected based on a preset lower limit and an upper limit of the actual battery SOC, specifically including:

[0110] The real-time battery SOC display should be corrected according to the following formula:

[0111]

[0112] Among them, SOC 表显 For real-time battery display SOC, SOC 实时 For real-time battery true SOC, SOC real上限 This represents the actual upper limit of the battery's SOC (State of Charge). real下限 This is a preset lower limit for the actual state of charge (SOC) of the battery.

[0113] In this embodiment, the lower limit of the preset real battery SOC is taken as 0% of the displayed SOC, and the upper limit of the real battery SOC is taken as 100% of the displayed SOC. The real-time battery displayed SOC is corrected by the percentile of the real-time battery SOC between the preset lower limit and the upper limit of the real battery SOC. Figure 2 This table shows the comparison between the real-time battery SOC and the real-time battery display SOC when the preset lower limit and upper limit of the real battery SOC are different. Taking the data highlighted in red in the figure as an example, when the preset lower limit of the real battery SOC is 5% and the upper limit of the real battery SOC is 99%, the real-time battery display SOC corresponding to the real-time battery SOC of 97% is 97.9%.

[0114] Figure 3 A flowchart of a power battery capacity correction method according to a preferred embodiment of this application is shown, which specifically includes:

[0115] Step S301: In response to the activation of the battery capacity correction function, obtain the preset battery true SOC lower limit and battery degradation impact parameters. The battery degradation impact parameters include vehicle mileage, battery service life, cell internal resistance growth rate, battery energy loss rate, and cell capacity degradation rate.

[0116] Step S302: Determine the upper limit of the battery's true SOC based on the battery degradation impact parameters, specifically including:

[0117] The first SOC upper limit is determined based on the range in which the vehicle travels;

[0118] The corresponding second SOC upper limit is determined based on the range of battery lifespan.

[0119] The corresponding third SOC upper limit is determined based on the range in which the cell internal resistance growth rate falls.

[0120] The corresponding fourth SOC upper limit is determined based on the range of battery energy loss rate.

[0121] The corresponding fifth SOC upper limit is determined based on the range of cell capacity decay rate.

[0122] The smaller value among 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 is selected as the actual SOC upper limit of the battery.

[0123] Step S303: Correct the real-time battery SOC display based on the preset lower limit and upper limit of the actual battery SOC, specifically including:

[0124] The real-time battery SOC display should be corrected according to the following formula:

[0125]

[0126] Among them, SOC 表显 For real-time battery display SOC, SOC 实时 For real-time battery true SOC, SOC real上限 This represents the actual upper limit of the battery's SOC (State of Charge). real下限 This is a preset lower limit for the actual state of charge (SOC) of the battery.

[0127] Step S304: In response to the activation of the battery display charging correction function, acquire vehicle charging data and / or battery energy and driving data.

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

[0129] Step S306: Determine the first correction parameter by dividing the number of times the reference depth is charged by the number of times the reference is charged.

[0130] Step S307: Determine the upper limit of the battery's displayed charging SOC based on the range in which the first correction parameter is located. The larger the first correction parameter is, the larger the upper limit of the battery's displayed charging SOC will be.

[0131] Step S308: Determine the second correction parameter by dividing the product of the cumulative pure electric driving mileage and the average pure electric driving energy consumption by the product of the reference charging number and the total energy that can be discharged when fully charged.

[0132] Step S309: Determine the upper limit of the battery's displayed charging SOC based on the range of the second correction parameter. The larger the second correction parameter is, the larger the upper limit of the battery's displayed charging SOC will be.

[0133] Step S310: If the battery display shows a charging SOC limit of less than 100%, proceed to step S311; otherwise, proceed to step S312.

[0134] Step S311: In response to the battery charging operation, obtain the last full charge time of the battery. If the time between the last full charge time and the current time exceeds a preset time threshold, then control the upper limit of this charging to the battery display full charge.

[0135] Step S312: In response to the battery charging operation, control the upper limit of this charging to the upper limit of the battery's displayed SOC.

[0136] Step S313: Determine the charging reminder SOC based on the upper limit of the battery's displayed charging SOC. When the real-time battery displayed SOC is the charging reminder SOC, issue a charging reminder message. The higher the upper limit of the battery's displayed charging SOC, the lower the charging reminder SOC.

[0137] Figure 4A flowchart of a power battery capacity correction method according to another preferred embodiment of this application is shown, which specifically includes:

[0138] Step S401: In response to the activation of the battery capacity correction function, obtain the preset battery true SOC lower limit and battery degradation impact parameters. The battery degradation impact parameters include vehicle mileage, battery service life, cell internal resistance growth rate, battery energy loss rate, and cell capacity degradation rate.

[0139] Step S402: Determine the upper limit of the battery's true SOC based on the battery degradation impact parameters, specifically including:

[0140] The first SOC upper limit is determined based on the range in which the vehicle travels;

[0141] The corresponding second SOC upper limit is determined based on the range of battery lifespan.

[0142] The corresponding third SOC upper limit is determined based on the range in which the cell internal resistance growth rate falls.

[0143] The corresponding fourth SOC upper limit is determined based on the range of battery energy loss rate.

[0144] The corresponding fifth SOC upper limit is determined based on the range of cell capacity decay rate.

[0145] The smaller value among 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 is selected as the actual SOC upper limit of the battery.

[0146] Step S403: Correct the real-time battery SOC display based on the preset lower limit and upper limit of the actual battery SOC, specifically including:

[0147] The real-time battery SOC display should be corrected according to the following formula:

[0148]

[0149] Among them, SOC 表显 For real-time battery display SOC, SOC 实时 For real-time battery true SOC, SOC real上限 This represents the actual upper limit of the battery's SOC (State of Charge). real下限 This is a preset lower limit for the actual state of charge (SOC) of the battery.

[0150] Step S404: In response to the activation of the battery display charging correction function, a battery display charging level selection window pops up.

[0151] Step S405: In response to the target battery charging level input by the user, determine the upper limit of the battery charging SOC based on the target battery charging level.

[0152] Step S406: If the battery display shows a charging SOC limit of less than 100%, proceed to step S407; otherwise, proceed to step S408.

[0153] Step S407: In response to the battery charging operation, obtain the last full charge time of the battery. If the time between the last full charge time and the current time exceeds a preset time threshold, then control the upper limit of this charging to the battery display full charge.

[0154] Step S408: In response to the battery charging operation, control the upper limit of this charging operation to the upper limit of the battery's displayed SOC.

[0155] Step S409: Determine the charging reminder SOC based on the upper limit of the battery's displayed charging SOC. When the real-time battery displayed SOC is the charging reminder SOC, issue a charging reminder message. The higher the upper limit of the battery's displayed charging SOC, the lower the charging reminder SOC.

[0156] The technical solution of this application also provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform the power battery capacity correction method in any of the foregoing embodiments.

[0157] Figure 5 An electronic device according to this application is shown, comprising:

[0158] At least one processor 501; and,

[0159] The 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, which, when executed by the at least one processor 501, enables the at least one processor 501 to perform all the steps of the power battery capacity correction method in any of the foregoing method embodiments.

[0161] The electronic device is preferably an in-vehicle electronic control unit (ECU), and more specifically a microcontroller unit (MCU) within the in-vehicle electronic control unit.

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

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

[0164] The processor 501, memory 502, input device 503 and output device 504 can be connected by a bus or other means. The figure shows an example of connection by bus.

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

[0166] The memory 502 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the power battery capacity correction method. Furthermore, the memory 502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 502 may optionally include memory remotely located relative to the processor 501, and these remote memories may be connected via a network to the apparatus performing the power battery capacity correction method. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, 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 may include a display device such as a display screen.

[0168] When one or more modules are stored in the memory 502, and are run by 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 merely the principle and preferred embodiment of this application. It should be noted that for those skilled in the art, implementation methods obtained by appropriately combining the technical solutions disclosed in different embodiments are also included within the technical scope of this invention. Based on the principle of this application, several other modifications can also be made, which should also be considered within the protection scope of this application.

Claims

1. A method for correcting the capacity of a power battery, characterized in that, The method comprises the following steps: In response to the starting of the battery apparent charging correction function, vehicle charging data and / or battery energy and driving data are acquired, the vehicle charging data comprising a reference charging frequency in a latest set time period and a reference deep charging frequency in the latest set time period, the battery energy and driving data comprising a pure electric driving average power consumption, a total energy that can be discharged after full charging, and a cumulative pure electric driving distance in the latest set time period, the reference charging frequency being the charging frequency of the battery in the latest set time period, and the reference deep charging frequency being the number of times that the SOC increases by a set amount during the charging of the battery in the latest set time period; A battery apparent charging SOC upper limit is determined according to the vehicle charging data and / or the battery energy and driving data; If the battery apparent charging SOC upper limit is less than 100%, the last battery full charging time is acquired in response to a battery charging operation; If the last battery full charging time is more than a preset time threshold from the current time, the upper limit of the current charging is controlled to be the battery apparent full charge, otherwise, the upper limit of the current charging is controlled to be the battery apparent charging SOC upper limit, the battery apparent full charge being that the battery charging capacity reaches full charging.

2. The method according to claim 1, wherein the battery apparent charging SOC upper limit is determined according to the vehicle charging data and / or the battery energy and driving data, specifically comprising: If the reference charging frequency is greater than or equal to a preset charging frequency threshold, a first correction parameter is determined according to the reference deep charging frequency divided by the reference charging frequency; According to the interval in which the first correction parameter is located, a corresponding battery apparent charging SOC upper limit is determined, and the larger the first correction parameter is, the larger the corresponding battery apparent charging SOC upper limit is.

3. The method according to claim 2, wherein the battery apparent charging SOC upper limit is determined according to the vehicle charging data and / or the battery energy and driving data, specifically comprising: If the reference charging frequency is less than a preset charging frequency threshold, a second correction parameter is determined according to the product of the cumulative pure electric driving distance and the pure electric driving average power consumption divided by the product of the reference charging frequency and the total energy that can be discharged after full charging; According to the interval in which the second correction parameter is located, a corresponding battery apparent charging SOC upper limit is determined, and the larger the second correction parameter is, the larger the corresponding battery apparent charging SOC upper limit is. After the battery apparent charging SOC upper limit is determined, the method further comprises: A charging reminder SOC is determined according to the battery apparent charging SOC upper limit, and the larger the battery apparent charging SOC upper limit is, the smaller the charging reminder SOC is; 4. The power cell capacity correction method of claim 1, wherein, When the real-time battery apparent SOC is the charging reminder SOC, a charging reminder information is sent. The method further comprises: In response to the starting of the battery apparent charging correction function, a battery apparent charging gear selection window is popped up; 5. The power cell capacity correction method of claim 1, wherein, In response to a target battery apparent charging gear input by a user, a battery apparent charging SOC upper limit is determined according to the target battery apparent charging gear. Before the response to the starting of the battery apparent charging correction function, the method further comprises: ​ 6. The power cell capacity correction method according to any one of claims 1 to 5, characterized in that, ​ In response to the battery capacity correction function being started, a preset lower limit of a real SOC of the battery and a battery attenuation influence parameter are obtained; An upper limit of the real SOC of the battery is determined according to the battery attenuation influence parameter; The real-time apparent SOC of the battery is corrected according to the preset lower limit of the real SOC of the battery and the upper limit of the real SOC of the battery.

7. The power cell capacity correction method of claim 6, wherein, The battery attenuation influence parameter includes a vehicle driving mileage, a battery service life, a growth rate of an internal resistance of a battery cell, a battery energy loss rate, and a capacity attenuation rate of the battery cell. The upper limit of the real SOC of the battery is determined according to the battery attenuation influence parameter, and specifically includes: A first upper limit of the SOC is determined according to a range in which the vehicle driving mileage is located; A second upper limit of the SOC is determined according to a range in which the battery service life is located; A third upper limit of the SOC is determined according to a range in which the growth rate of the internal resistance of the battery cell is located; A fourth upper limit of the SOC is determined according to a range in which the battery energy loss rate is located; A fifth upper limit of the SOC is determined according to a range in which the capacity attenuation rate of the battery cell is located; A smaller value is selected from the first upper limit of the SOC, the second upper limit of the SOC, the third upper limit of the SOC, the fourth upper limit of the SOC, and the fifth upper limit of the SOC as the upper limit of the real SOC of the battery.

8. The power cell capacity revision method of claim 6, wherein, The real-time apparent SOC of the battery is corrected according to the preset lower limit of the real SOC of the battery and the upper limit of the real SOC of the battery, and specifically includes: The real-time apparent SOC of the battery is corrected according to the following formula: Wherein, SOC 表显 is the real-time battery indicated SOC, SOC 实时 is the real-time battery true SOC, SOC real上限 is the upper limit of the battery true SOC, SOC real下限 is the lower limit of the preset battery true SOC.

9. A storage medium, characterized by The storage medium stores computer instructions, and when the computer executes the computer instructions, the power battery capacity correction method according to any one of claims 1-8 is executed.

10. An electronic device, comprising: The power battery capacity correction device includes at least one processor; and The memory is in communication connection with 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 to enable the at least one processor to execute the power battery capacity correction method according to any one of claims 1-8.

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