Power battery life maintenance method and device, vehicle, medium and program product

Abstract

The invention discloses a service life maintenance method and device of a power battery, a vehicle medium and a program product. The method comprises the following steps: acquiring an internal pressure difference of the power battery at a first temperature and charging data of the power battery; a first maintenance prompt is output based on the size relation between the internal pressure difference and a first preset pressure difference threshold value corresponding to the first temperature; judging whether the power battery meets a first charging condition or not based on the charging data, and outputting a second maintenance prompt of the power battery according to a judgment result; and determining a life maintenance strategy of the power battery based on the first maintenance prompt and the second maintenance prompt. According to the technical scheme, the reliability and accuracy of service life maintenance of the power battery can be improved in the service life maintenance process of the power battery, and then the service life maintenance effect of the power battery is effectively improved.

Description

Technical Field

[0001] This application relates to the field of vehicle battery technology, specifically to a method, device, vehicle, medium, and program product for maintaining the life of a power battery. Background Technology

[0002] As society places greater emphasis on issues such as the ecological environment and energy utilization, more and more users are opting for new energy vehicles for their daily use. Consequently, the lifespan of the power batteries in new energy vehicles has become a major concern for users.

[0003] Currently, to extend the lifespan of power batteries in new energy vehicles, the vehicle's BMS (Battery Management System) typically monitors parameters such as SOC (State of Charge), voltage, and temperature during the charging process. This allows for control of voltage and temperature at different SOC states, thus maintaining the battery's lifespan. However, this method cannot accurately determine whether battery maintenance is needed, and its effectiveness is limited. Summary of the Invention

[0004] In view of the above problems, this application provides a method, device, vehicle, medium and program product for life maintenance of power batteries, which can improve the reliability and accuracy of life maintenance of power batteries during the life maintenance process, thereby effectively improving the life maintenance effect of power batteries.

[0005] According to one aspect of the embodiments of this application, a method for maintaining the life of a power battery is provided, the method comprising: Acquire the internal pressure difference of the power battery and the charging data of the power battery at a first temperature; Based on the relationship between the internal pressure difference and the first preset pressure difference threshold corresponding to the first temperature, a first maintenance prompt is output. Based on the charging data, determine whether the power battery meets the first charging condition, and output the second maintenance prompt for the power battery according to the determination result; The life maintenance strategy for the power battery is determined based on the first maintenance prompt and the second maintenance prompt.

[0006] According to another aspect of the embodiments of this application, a life maintenance device for a power battery is provided, the device comprising: The acquisition module is used to acquire the internal pressure difference of the power battery at a first temperature and the charging data of the power battery; The output module is used to output a first maintenance prompt based on the relationship between the internal pressure difference and the first preset pressure difference threshold corresponding to the first temperature; The output module is also used to determine whether the power battery meets the first charging condition based on the charging data, and to output a second maintenance prompt for the power battery based on the determination result. The determination module is used to determine the life maintenance strategy of the power battery based on the first maintenance prompt and the second maintenance prompt.

[0007] According to another aspect of the embodiments of this application, a vehicle is provided, comprising: Controller; The memory is used to store one or more programs, which, when executed by the controller, enable the controller to implement the power battery life maintenance method described above.

[0008] According to another aspect of the embodiments of this application, a computer-readable storage medium is provided, wherein a computer program is stored in the computer program, which, when run on a power battery life maintenance device / vehicle, causes the power battery life maintenance device / vehicle to perform the steps of the power battery life maintenance method as described above.

[0009] According to another aspect of the embodiments of this application, a computer program product is provided, the computer program product including a computer program or executable instructions, which, when executed by a processor, implements the power battery life maintenance method as described above.

[0010] In the power battery life maintenance method provided in this application embodiment, a power battery life maintenance strategy is determined based on the output of a first maintenance prompt and a second maintenance prompt. The first maintenance prompt considers the relationship between the internal pressure difference of the power battery at different temperatures and the magnitude of a first preset pressure difference threshold at the corresponding temperature. This allows for a more accurate determination of whether the internal pressure difference of the power battery is normal, avoiding misjudgments of internal pressure difference caused by the limitation of a fixed pressure difference threshold at a single temperature. Simultaneously, it considers whether the power battery's charging data meets a first charging condition. Charging data reflects the user's usual charging habits. Determining whether the first charging condition is met based on the charging data essentially means determining whether the power battery is in an unreasonable charging condition, or whether the user has poor charging habits, based on the user's charging habits. Then, a second maintenance prompt is output based on the determination result. Therefore, the power battery life maintenance strategy determined by combining the first and second maintenance prompts comprehensively considers both battery temperature and user charging habits to determine whether the power battery needs maintenance and to select an appropriate maintenance strategy. This improves the reliability and accuracy of power battery life maintenance, thereby effectively enhancing the power battery life maintenance effect.

[0011] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0012] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0013] Figure 1 This paper illustrates a flowchart of an embodiment of the life maintenance method for a power battery of a remote terminal device according to this application.

[0014] Figure 2 The diagram illustrates a flowchart of an embodiment of the method for determining user charging habits in the life maintenance of the power battery of this application.

[0015] Figure 3 This paper illustrates a flowchart of an embodiment of the method for maintaining the lifespan of a power battery in this application, specifically for determining the internal pressure difference of the power battery.

[0016] Figure 4A schematic diagram of an embodiment of the life maintenance device for a vehicle's power battery, as described in this application, is shown.

[0017] Figure 5 A schematic diagram of the structure of an embodiment of the vehicle provided in this application is shown. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0019] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0020] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0021] In this application, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0022] In related technologies, to extend the lifespan of power batteries in new energy vehicles, the vehicle's Battery Management System (BMS) typically monitors parameters such as State of Charge (SOC), voltage, and temperature of the power battery during charging. This allows for control of voltage and temperature at different SOC states, thus maintaining the battery's lifespan. However, controlling voltage and temperature at different SOC states cannot accurately determine whether battery lifespan maintenance is needed. Performing maintenance when it is not required results in limited effectiveness and may not improve the battery's lifespan or safety.

[0023] In view of this, in order to improve or solve the above problems, this application proposes a method for maintaining the lifespan of a power battery, which addresses the problem of inaccurate determination of whether a power battery needs lifespan maintenance and the limited effectiveness of such maintenance. This improves the reliability of lifespan maintenance and effectively enhances the maintenance effect. The execution entity of the power battery lifespan maintenance method can be a terminal device, server, vehicle domain controller, cockpit domain controller, or other processing device. The terminal device can be a user equipment (UE), computer, mobile device, user terminal, terminal, cellular phone, personal digital assistant (PDA), handheld device, computing device, in-vehicle device, wearable device, etc. In some possible implementations, the power battery lifespan maintenance method can be implemented by a processor calling computer-readable instructions stored in memory.

[0024] Specifically, please refer to, for example Figure 1 As shown, the life maintenance method for a power battery in this embodiment includes the following steps: Step S100: Obtain the internal pressure difference of the power battery and the charging data of the power battery at the first temperature.

[0025] Since the performance and lifespan of the power battery in a vehicle are affected by the power battery temperature and the user's charging habits, in order to avoid the power battery's performance being reduced and its lifespan being shortened due to the power battery temperature and the user's charging habits, this application embodiment uses a vehicle dynamics control (VDC) to collect the internal pressure difference data of the power battery at a first temperature, so as to facilitate subsequent judgment of the internal voltage consistency of the power battery through the internal pressure difference data; and collects charging data reflecting the user's usual charging habits during the vehicle charging process, so as to facilitate subsequent judgment of whether the power battery is in an unreasonable charging condition or whether the user has bad charging habits through the collected charging data.

[0026] The first temperature of the aforementioned power battery refers to a preset temperature of the power battery, which can be the temperature at any time. For example, it could be the vehicle temperature when responding to a maintenance condition judgment command, or the vehicle temperature when detecting vehicle maintenance conditions. This application embodiment does not limit the specific time of the first temperature; it can be the vehicle temperature at a time selected according to the application scenario. The first temperature can be collected by a temperature sensor installed on the power battery. The collected first temperature can be -30℃, 0℃, 25℃, 50℃, etc., which is only an example and not a specific limitation.

[0027] By using the above method, based on the internal pressure difference of the power battery under the first temperature state collected by VDC, as well as the charging data of the power battery, the internal pressure difference of the power battery and the user's charging habits can be determined more accurately.

[0028] Step S200: Based on the relationship between the internal pressure difference and the first preset pressure difference threshold corresponding to the first temperature, output a first maintenance prompt.

[0029] Because the internal pressure difference of a power battery is affected by different temperatures, it is not constant at different temperatures. Therefore, to determine whether there is a fault in the internal pressure difference of the power battery, it is necessary to comprehensively consider the allowable pressure difference at different temperatures. Therefore, based on historical simulation data and empirical judgment of the allowable pressure difference of vehicles at different temperatures, this application sets a correspondence between temperature and preset pressure difference thresholds. This correspondence can be recorded by the preset pressure difference threshold calibration table as shown in Table 1 below. The preset pressure difference threshold corresponding to each temperature represents the maximum pressure difference that the vehicle power battery can withstand without maintenance at that temperature.

[0030] This application embodiment determines the relationship between the internal pressure difference at a first temperature and a first preset pressure difference threshold at the corresponding temperature. When the internal pressure difference is greater than or equal to the first preset pressure difference threshold, it indicates that the internal pressure difference of the power battery is too large, and a first maintenance prompt for the power battery is output to determine that the power battery needs life maintenance at the first temperature. When the internal pressure difference is less than the first preset pressure difference threshold, it indicates that the internal pressure difference of the power battery is too small and no maintenance is required.

[0031] Referring to the preset differential pressure threshold calibration table in Table 1 below, the aforementioned first preset differential pressure threshold is obtained by looking up the preset differential pressure threshold calibration table based on the first temperature. The preset differential pressure threshold calibration table is a mapping table of multiple temperatures of the power battery and their corresponding first preset differential pressure thresholds. The first preset differential pressure thresholds corresponding to different temperatures of the power battery are calibrated according to actual application conditions. This is only an example and is not specifically limited. Through this pre-calibrated mapping table, the first preset differential pressure thresholds corresponding to the power battery at different temperatures can be determined. That is, the first preset differential pressure threshold corresponding to the power battery at the first temperature can be obtained and compared with the internal pressure difference at the first temperature. The influence of temperature on the internal pressure difference of the power battery is taken into account, thereby enabling a more accurate judgment on whether the internal pressure difference of the power battery is normal, avoiding the limitations of a fixed differential pressure threshold at a single temperature that leads to misjudgment of the internal pressure difference.

[0032] Table 1: Preset Differential Pressure Threshold Calibration Table For example, if the first temperature of the power battery is 25°C, then the first preset differential pressure threshold obtained based on the preset differential pressure threshold calibration table in Table 1 is 100mV. If the internal differential pressure of the power battery at 25°C is 120mV at the current moment, it indicates that the internal differential pressure of the power battery is too large, and it is determined that the power battery needs life maintenance, thereby outputting the first maintenance prompt of the power battery; if the internal differential pressure of the power battery at 25°C is 70mV at the current moment, it indicates that the internal differential pressure of the power battery is too small, and no maintenance is required.

[0033] The above method takes into account the influence of temperature on the internal pressure difference of the power battery, thus enabling a more accurate judgment on whether the internal pressure difference of the power battery is normal, and identifying potential risks of the power battery earlier. This allows for proactive maintenance and prevention of the power battery, avoiding the misjudgment of internal pressure difference caused by the limitations of a fixed pressure difference threshold at a single temperature.

[0034] Step S300: Based on the charging data, determine whether the power battery meets the first charging condition, and output the second maintenance prompt for the power battery according to the determination result.

[0035] Charging data can be used to reflect a user's charging habits, specifically the charging speed and whether the battery is fully charged during normal charging. Determining whether the first charging condition is met based on the charging data essentially means judging whether the battery is under unreasonable charging conditions or whether the user has bad charging habits. Based on these bad or unreasonable charging habits, it is determined whether they are affecting the battery. If the charging data affects the battery's charging and discharging performance, lifespan, etc., a second maintenance reminder is output, indicating that the battery needs lifespan maintenance.

[0036] By using the above method, it is considered whether the charging data of the power battery meets the first charging condition, and then it is determined whether the user's bad charging habits or unreasonable charging conditions represented by the charging data have an impact on the life of the power battery. Based on the analysis of the power battery charging data in this embodiment, it is possible to more accurately judge the user's charging habits, identify potential risks of the power battery earlier, realize proactive maintenance and prevention of the power battery, and avoid the problem of uneven internal pressure difference of the power battery caused by the user using fast charging or not fully charging.

[0037] Step S400: Determine the life maintenance strategy of the power battery based on the first maintenance prompt and the second maintenance prompt.

[0038] Since the first maintenance prompt is related to the internal pressure difference of the power battery at the corresponding temperature, and the second maintenance prompt is related to poor user charging habits in the charging data, the power battery life maintenance strategy determined by combining the first and second maintenance prompts is a power battery life maintenance strategy that comprehensively considers the internal pressure difference of the power battery at the preset first temperature and the user charging habits represented by the charging data. This achieves the goal of comprehensively considering both the power battery temperature and user charging habits to determine whether the power battery needs maintenance and to select an appropriate maintenance strategy. It can more accurately identify the potential risks of the power battery, thereby improving the reliability and accuracy of power battery life maintenance and effectively enhancing the life maintenance effect of the power battery.

[0039] In an optional exemplary embodiment, the charging data includes the charging mode and charging status for each charge within a first time period. Based on this charging data, the user's charging habits are determined, thereby determining whether each charge is fast or slow, and whether it is fully charged or not fully charged. It is then determined whether the charging data of the power battery meets the first charging condition. (See example...) Figure 2 As shown, the method of this application also includes at least: If, based on the charging modes and charging states of multiple charging cycles, it is determined that the charging mode of the power battery is fast charging for a preset number of consecutive cycles within the first time period, or the charging mode is slow charging for a preset number of consecutive cycles and the charging state is not fully charged, or there are situations of fast charging and full charging, fast charging and not fully charging, and slow charging and not fully charging within a preset number of consecutive cycles, then it is determined that the power battery meets the first charging condition.

[0040] The first time period is any period in the past, representing a statistical period for the charging status of the power battery. The first time period can be, but is not limited to, the past 30 days, the past 60 days, the past 90 days, etc. The charging data within the first time period includes the charging status of the power battery when the user charges it multiple times. The charging data within the first time period can be 20 charging times, 30 charging times, 40 charging times, etc. The first time period and the multiple charging statuses within the charging data are only illustrative examples and are not specifically limited.

[0041] In this embodiment, the multiple charging scenarios in the charging data are analyzed to determine the fast charging or slow charging status, and the full charging or incomplete charging status for each charging data point. This allows for the determination of the number of times the charging mode is fast charging (including both fast charging and full charging status, and fast charging and incomplete charging status) and the number of times the charging mode is slow charging and incomplete charging status within a first time period. This directly reflects each charging data point performed by the user on the power battery, facilitating the determination of the number of consecutive fast-to-full charging cycles, the number of consecutive fast-to-incomplete charging cycles, the number of consecutive slow-to-incomplete charging cycles, and the number of slow-to-full charging cycles based on the multiple charging scenarios included in the charging data within a preset time period.

[0042] In the above method, the charging mode refers to the charging speed of each charge during the charging process of the power battery. It is a parameter that measures how fast the vehicle's power battery is charged, and its unit is kilowatt (kW). Charging speed is generally divided into fast charging and slow charging. The distinction between fast charging and slow charging is set according to the actual application. For example, fast charging is generally higher than 30kW, such as 35kW, 60kW, 120kW, 200kW, etc., while slow charging is generally lower than 12kW, such as 3.5kW, 6.6kW, 7kW, etc. The fast charging speed and slow charging speed mentioned here are only for illustrative purposes and are not specifically limited.

[0043] The state of charge (SOC) refers to the state of charge of the power battery after each charge cycle, representing the ratio of the remaining charge to the total capacity of the power battery when charging is complete. It is generally expressed as a percentage (%). For example, in this application embodiment, a fully charged state refers to a SOC of 100%, meaning that the ratio of the remaining charge to the total capacity of the power battery is 100% when charging is complete. A partially charged state refers to a SOC that can be 30%, 50%, 70%, etc., meaning that charging stops before the ratio of the remaining charge to the total capacity of the power battery reaches 100% when charging is complete.

[0044] By using the above method, the number of consecutive fast-charging cycles, the number of consecutive fast-charging cycles with partial charging, the number of consecutive slow-charging cycles with partial charging, and the number of slow-charging cycles are considered in the charging data. Based on the analysis of user charging habits in this embodiment, user charging habits can be more accurately determined, potential risks to the power battery can be more accurately identified, and proactive maintenance and prevention of the power battery can be achieved, avoiding the problem of uneven internal pressure difference in the power battery caused by users using fast charging or not fully charging.

[0045] In conjunction with the above embodiments, the charging data obtained within the first time period includes the number of consecutive fast-charging cycles, the number of consecutive fast-charging cycles that are not fully charged, the number of consecutive slow-charging cycles that are not fully charged, or the number of slow-charging cycles that are fully charged. Therefore, if the charging data within the first time period satisfies the following conditions: a preset number of consecutive fast-charging cycles with a fully charged state, a preset number of consecutive fast-charging cycles with a partially charged state, a preset number of consecutive slow-charging cycles with a partially charged state, or a preset number of consecutive fast-charging cycles with a fully charged state, a preset number of consecutive fast-charging cycles with a partially charged state, or a preset number of consecutive fast-charging cycles with a fully charged state, a preset number of consecutive fast-charging cycles with a partially charged state, or a preset number of consecutive slow-charging cycles with a partially charged state, then the charging data within the first time period is determined to meet the first charging condition. This means that the charging data within the first time period contains unreasonable charging conditions or indicates that the user has poor charging habits that could damage the lifespan of the power battery. In this case, a second maintenance reminder for the power battery needs to be output to determine that the power battery requires lifespan maintenance.

[0046] If the charging data within the first time period satisfies any slow full charge within a preset number of consecutive cycles, it indicates that the user has good charging habits. The user's charging habits have little impact on the lifespan of the power battery, and therefore maintenance is not required.

[0047] For example, if the acquired charging data is from the past 30 days, and within this statistical data, if the power battery shows 20 consecutive charging cycles within those 30 days that are in a fast-to-full charge state, it is determined that the power battery meets the first charging condition, indicating a poor charging habit; or if the power battery shows 20 consecutive charging cycles within those 30 days that are in a fast-to-incomplete charge state, it is determined that the power battery meets the first charging condition, indicating a poor charging habit; or if the power battery shows 20 consecutive charging cycles within those 30 days that are in a slow-to-incomplete charge state, it is determined that the power battery meets the first charging condition, indicating a poor charging habit; or if the 20 consecutive charging cycles within those 30 days only include fast-to-full charge, fast-to-incomplete charge, and slow-to-incomplete charge states, it is determined that the power battery meets the first charging condition, indicating a poor charging habit; in these cases, the user's charging habits are detrimental to the lifespan protection of the power battery. In such cases, a second maintenance prompt needs to be output to determine that the power battery requires lifespan maintenance. If the power battery has experienced any slow-to-full charge state in the past 30 days, then it can be determined that the user has good charging habits, and the user's charging habits have little impact on the life of the power battery, so no maintenance is required.

[0048] The above-mentioned number of consecutive preset times is set according to the actual application situation. For example, the number of consecutive preset times can be 15 times, 20 times, 30 times, etc. This is only an example and is not specifically limited.

[0049] By taking into account the number of consecutive fast-charging times, the number of consecutive fast-charging times that were not fully charged, the number of consecutive slow-charging times that were not fully charged, and the number of slow-charging times that were fully charged within a preset first time period, the analysis of user charging habits based on this embodiment can more accurately determine user charging habits, more accurately identify potential risks in the power battery, achieve proactive maintenance and prevention of the power battery, and avoid problems such as uneven internal pressure difference in the power battery caused by users using fast charging or not fully charging.

[0050] In an exemplary embodiment, when counting the number of consecutive times of fast charging to full charge, fast charging to incomplete charge, and slow charging to incomplete charge within a preset first time period, if any of the obtained charging data shows a slow charging to full charge state, it will lead to a deviation in the judgment of the user's charging habits. In this embodiment, the charging data of the power battery undergoing slow charging to full charge is obtained within a preset number of consecutive times. Whenever any of the obtained charging data shows a slow charging to full charge state, the consecutive count of the number of times the user's charging habits are determined based on the number of times fast charging to full charge, fast charging to incomplete charge, and slow charging to incomplete charge is reset to zero and the count is restarted.

[0051] For example, if the charging data obtained is the charging data of the past 30 days, and in the statistical data of these 30 days, if each of the 15 consecutive charging data is in the fast charging state, and the 16th charging data is in the slow charging state, then the judgment of the user's charging habits needs to reset the consecutive count to zero and start counting again.

[0052] The above method takes into account the impact of slow charging on the judgment of user charging habits within the consecutive counting of charging data, which may lead to deviations in the judgment of user charging habits, thereby improving the accuracy of the judgment of user charging habits.

[0053] In one exemplary embodiment, to more accurately determine the internal pressure difference of the power battery at the first temperature, please refer to... Figure 2 As shown, this application also includes at least steps S110 to S130, as detailed below: Step S110: Under the first temperature condition, acquire multiple voltage values ​​in the power battery and calculate the voltage difference between each pair of voltage values; Step S120: Determine the maximum voltage difference of the power battery based on multiple voltage differences; Step S130: Determine the internal pressure difference of the power battery at the first temperature based on the maximum voltage difference and the second preset pressure difference threshold.

[0054] Since the internal voltage difference of a power battery at a corresponding temperature can reflect the balance of the internal voltage of the power battery, thereby determining the voltage consistency inside the power battery, this application embodiment obtains the current first temperature of the power battery, and then obtains multiple voltage values ​​inside the power battery under the current first temperature state, thereby determining the maximum voltage difference of the power battery based on the multiple voltage values. After determining the maximum voltage difference at the current first temperature, the internal voltage difference of the power battery is determined in combination with the second preset voltage difference threshold.

[0055] In the above embodiments, the internal differential pressure data of the power battery is obtained by voltage sensors collecting voltage values ​​at multiple locations, and then the vehicle's BMS calculates and feeds back to the VDC based on the voltage values ​​at multiple locations. The multiple voltage sensors installed inside the power battery can be based on the number of battery cells, meaning each battery cell has a corresponding voltage sensor. Alternatively, depending on the actual application, multiple sensors can be installed at different locations within the power battery, such as 100, 500, 1000, or 5000. This is merely an illustrative example and not a specific limitation.

[0056] The second preset differential pressure threshold is set according to the actual application. For example, the second preset differential pressure threshold can be 400mV, 450mV, 500mV, etc. This is only an example and is not specifically limited.

[0057] For example, if 100 voltage sensors are installed inside the power battery, the voltage values ​​collected by the multiple voltage sensors at multiple locations inside the power battery can be BMS_CellVolt1, BMS_CellVolt2, BMS_CellVolt3, BMS_CellVolt4, ... BMS_CellVolt98, BMS_CellVolt99, BMS_CellVolt100. The vehicle's BMS calculates the voltage difference between each pair of voltage values ​​based on the collected multiple voltage values, resulting in multiple voltage differences as follows: ΔV1=| BMS_CellVolt1- BMS_CellVolt2|; ΔV2=| BMS_CellVolt1- BMS_CellVolt3|; ΔV3=| BMS_CellVolt1- BMS_CellVolt4|; ΔV4=| BMS_CellVolt2- BMS_CellVolt4|; ... ΔV n-2 =| BMS_CellVolt99- BMS_CellVolt98|; ΔV n-1 =| BMS_CellVolt2- BMS_CellVolt99|; ΔV n =| BMS_CellVolt99- BMS_CellVolt100|.

[0058] In the process of BMS calculating the voltage difference between any two voltage values ​​from multiple collected voltage values, the voltage difference is between any two voltage values, resulting in multiple voltage differences ΔV1, ΔV2, ΔV3, ΔV4, ..., ΔV n-2 ΔV n-1 ΔV n Then, multiple voltage differences are compared to obtain the maximum voltage difference ΔV among them. max After determining the maximum voltage difference ΔV at the current first temperature max Then, the internal pressure difference of the power battery is determined by combining the second preset pressure difference threshold.

[0059] Furthermore, the maximum voltage difference ΔV of the power battery at the current first temperature is... max Compare with the second preset voltage difference threshold; at the maximum voltage difference ΔV max When the voltage difference is greater than or equal to the second preset differential voltage threshold, a fault status indication for the power battery is output; at the maximum voltage difference ΔV max When the voltage difference is less than the second preset differential voltage threshold, the maximum voltage difference is taken as the internal differential voltage of the power battery at the first temperature.

[0060] For example, if the second preset differential voltage threshold is 500mV, the maximum voltage difference ΔV is calculated by the BMS and fed back to the VDC. max If the voltage is 600mV, then the maximum voltage difference ΔV of the power battery under the current first condition is... max If the voltage difference exceeds the second preset threshold, it indicates an abnormality in the internal voltage consistency of the power battery, indicating a fault. In this case, a fault status prompt should be output to facilitate timely handling by the user based on the fault status prompt.

[0061] If the second preset differential voltage threshold is 500mV, the maximum voltage difference ΔV calculated by the BMS and fed back to the VDC is... max If the voltage is 300mV, then the maximum voltage difference ΔV of the power battery at the current first temperature is... max When the voltage difference is less than the second preset voltage difference threshold, the maximum voltage difference ΔV will be... max As the internal pressure difference of the power battery at the current first temperature, it provides a basis for determining whether the power battery needs life maintenance based on the first preset pressure difference threshold corresponding to the first temperature.

[0062] In an optional exemplary embodiment, to illustrate how to determine a specific lifespan maintenance strategy based on the output of a first maintenance prompt and a second maintenance prompt, including outputting a charging prompt for slow charging of the power battery, the level of the strategy prompt, and outputting the location information of available slow charging piles within the current preset area, this application further includes at least the following steps S410 to S440: Step S410: If both the first maintenance prompt and the second maintenance prompt indicate that no maintenance is required, it is determined that the power battery does not require life maintenance. Step S420: When the first maintenance prompt indicates that maintenance is required and the second maintenance prompt indicates that maintenance is not required, the life maintenance strategy of the power battery is determined to output a charging prompt to slowly charge the power battery and output the location information of the slow charging piles available in the current preset area, and the level of the strategy prompt is the second level. Step S430: When the first maintenance prompt indicates that no maintenance is required and the second maintenance prompt indicates that maintenance is required, the life maintenance strategy of the power battery is determined to output a charging prompt to slowly charge the power battery, and the level of the strategy prompt is the first level. Step S440: When both the first maintenance prompt and the second maintenance prompt indicate that maintenance is required, the life maintenance strategy of the power battery is determined to be to output a charging prompt for slow charging of the power battery and output the location information of available slow charging piles within the current preset area, and the level of the strategy prompt is the third level.

[0063] In conjunction with the above embodiments, the first maintenance prompt related to the internal pressure difference of the power battery at the first temperature, and the second maintenance prompt related to user charging habits such as fast charging and incomplete charging in the charging data; this application embodiment divides the life maintenance strategy based on the first and second maintenance prompts obtained by VDC. If both the first and second maintenance prompts obtained by VDC indicate that no maintenance is required, it means that the internal pressure difference of the power battery at the first temperature is normal, and the user has recently used slow charging to charge the vehicle's power battery, that is, the vehicle's power battery is in good condition and the user's charging habits are good. At this time, it is determined that the power battery does not need life maintenance.

[0064] If the first maintenance prompt obtained from VDC indicates that no maintenance is needed, and the second maintenance prompt indicates that maintenance is needed, it means that the internal pressure difference of the power battery is normal at the first temperature, but the user has not used slow full charge to charge the vehicle's power battery within a recent preset number of consecutive times. In other words, the vehicle's power battery is in good condition, but the user's charging habits are poor. At this time, a charging prompt to perform slow full charge on the power battery is output, and the strategy prompt level is the first level.

[0065] If the VDC receives a first maintenance prompt indicating that maintenance is required and a second maintenance prompt indicating that maintenance is not required, it means that the user has used slow charging to charge the vehicle's power battery within a recent preset number of consecutive cycles. However, the internal pressure difference of the power battery is abnormal at the first temperature, which means that the user's charging habits are good but the vehicle's power battery is in poor condition. At this time, a charging prompt to slow charge the power battery is output, as well as the location information of available slow charging stations within the current preset area of ​​the vehicle, and the strategy prompt level is the second level.

[0066] If both the first and second maintenance prompts obtained from VDC indicate that maintenance is required, it means that the internal pressure difference of the power battery is abnormal at the first temperature, and the user has not used slow charging to charge the vehicle's power battery within a recent preset number of consecutive times. In other words, the vehicle's power battery is in poor condition and the user has poor charging habits. At this time, a charging prompt to slow charge the power battery is output, as well as the location information of available slow charging stations within the current preset area of ​​the vehicle, and the strategy prompt level is the third level.

[0067] In the above embodiments, the charging prompts for slow and full charging of the power battery can be provided through at least one of the following: the vehicle's central control battery management interface, the vehicle's central control main interface, the vehicle's instrument panel interface, the vehicle's HUD (Head-Up Display), and the vehicle's remote control terminal APP (Application). This is only an illustrative example and is not intended to be specific.

[0068] The charging prompts for slow charging and full charging may include phrases such as "Poor charging habits, we recommend that you use slow charging to fully charge the battery", "Battery condition is poor, we recommend that you use slow charging to fully charge the battery", or "Poor charging habits and battery condition, we recommend that you use slow charging to fully charge the battery". These charging prompts are for illustrative purposes only and are not intended to be specific.

[0069] The level of strategy prompts can be divided by the color of the charging prompt content. The first level to the third level represent the level of strategy prompts from low to high. For example, the first level of strategy prompts can be blue, the second level can be yellow, and the third level can be red. The division of prompt levels by color here is only an example and is not a specific limitation.

[0070] The lifespan maintenance strategy includes outputting the location information of available slow-charging stations within a preset area of ​​the vehicle. This can be achieved by obtaining the vehicle's current location through its navigation system and then identifying available slow-charging stations within that preset area. The strategy recommends these stations to the user for slow charging. When the user needs to charge the vehicle's battery at a recommended station, they can manually or verbally confirm the trip to the desired location to maintain the battery's lifespan. The user can also manually or verbally exit the process if they decide not to charge the battery. It should be understood that the preset area is defined based on the specific application. For example, the preset area could be a 1km radius area centered on the vehicle's location, a 2km radius area, or a 5km radius area; this is merely an example and not a specific limitation.

[0071] Through the above embodiments, the life maintenance strategy for the power battery determined by combining the first and second maintenance prompts is a life maintenance strategy for the power battery that comprehensively considers the abnormal internal pressure difference of the power battery at the corresponding temperature and the user's poor charging habits such as fast charging and incomplete charging in the charging data. This strategy provides users with effective life maintenance prompts, which can solve the problem that the current power battery lacks effective life maintenance prompts and users may ignore the maintenance of the power battery during use. It provides corresponding life maintenance suggestions based on the state of the power battery and the user's charging habits. At the same time, it can more accurately identify the potential risks of the power battery, realize proactive maintenance and prevention of the power battery, improve the reliability and accuracy of life maintenance of the power battery, and thus effectively improve the life maintenance effect of the power battery.

[0072] In an exemplary embodiment, in order to enable users to perform timely life maintenance on the power battery, this application further includes at least the following methods: If both the first and second maintenance prompts within the preset time period indicate that maintenance is required, and if the vehicle is in a high-voltage state or charging state, then the life maintenance strategy of the power battery is output.

[0073] The preset duration can be set according to the actual application. For example, the preset duration can be 20 days, 30 days, 50 days, 60 days, etc. This is only an example and is not a specific limitation.

[0074] In conjunction with the above embodiments, a life maintenance strategy for the power battery is determined based on the first maintenance prompt and the second maintenance prompt. If the power battery of the vehicle needs life maintenance within a preset time period, the vehicle's VDC will continuously acquire information about whether the power battery has undergone life maintenance. That is, the VDC will detect whether the user has performed a slow full charge operation on the vehicle's power battery. If no life maintenance is acquired, the VDC will control and output the life maintenance strategy for the power battery once the vehicle is in a high voltage state or charging state.

[0075] For example, if both the first and second maintenance reminders within 30 days indicate that the power battery needs life maintenance, when the user needs to use the vehicle in the morning and starts the vehicle to put it into a high-voltage state, the vehicle's central control interface, instrument panel, and HUD will display policy prompts to remind the user to proactively perform life maintenance on the power battery. This frequent reminder encourages the user to take proactive preventative measures to maintain the power battery, thereby addressing the current lack of effective life maintenance reminders for power batteries, which may lead users to neglect power battery maintenance during use.

[0076] Figure 4 A schematic diagram of an embodiment of the life maintenance device for a vehicle's power battery, as described in this application, is shown. Please refer to... Figure 4 As shown, the power battery life maintenance device 500 includes an acquisition module 510, an output module 520, and a determination module 530. The acquisition module 510 is used to acquire the internal pressure difference of the power battery at the first temperature and the charging data of the power battery; Output module 520 outputs a first maintenance prompt based on the relationship between the internal pressure difference and the first preset pressure difference threshold corresponding to the first temperature. The output module 520 is also used to determine whether the power battery meets the first charging condition based on the charging data, and output the second maintenance prompt of the power battery according to the determination result; The determination module 530 is used to determine the life maintenance strategy of the power battery based on the first maintenance prompt and the second maintenance prompt.

[0077] It should be noted that the power battery life maintenance device 500 provided in the above embodiments and the power battery life maintenance method provided in the aforementioned embodiments belong to the same concept. The specific way in which each module and unit performs operations has been described in detail in the method embodiments, and will not be repeated here.

[0078] Figure 5The diagram illustrates the structure of an embodiment of the vehicle described in this application, and also shows the structure of a computer system suitable for implementing the vehicle in this application. The specific embodiments of this application do not limit the specific implementation of the vehicle.

[0079] Please see Figure 5 As shown, the vehicle includes: a controller; and a memory for storing one or more programs, which, when executed by the controller, perform the aforementioned method for maintaining the lifespan of the power battery.

[0080] Please continue reading. Figure 5 As shown, the vehicle's computer system 600 includes a Central Processing Unit (CPU) 601, which can perform various appropriate actions and processes, such as executing the methods described in the above embodiments, based on programs stored in Read-Only Memory (ROM) 602 or programs loaded from storage portion 608 into Random Access Memory (RAM) 603. The RAM 603 also stores various programs and data required for system operation. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An Input / Output (I / O) interface 605 is also connected to the bus 604.

[0081] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed into storage section 608 as needed.

[0082] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611. When the computer program is executed by central processing unit (CPU) 601, it performs various functions defined in the system of this application.

[0083] Another aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the power battery life maintenance method described above. This computer-readable storage medium may be included in the vehicle described in the above embodiments, or it may exist independently and not installed in the vehicle.

[0084] Another aspect of this application provides a computer program product or computer program comprising at least one executable instruction that, when executed on a power battery life maintenance device / vehicle, causes the power battery life maintenance device / vehicle to perform the power battery life maintenance method as described below: Acquire the internal pressure difference of the power battery and the charging data of the power battery at a first temperature; Based on the relationship between the internal pressure difference and the first preset pressure difference threshold corresponding to the first temperature, a first maintenance prompt is output. Based on the charging data, determine whether the power battery meets the first charging condition, and output the second maintenance prompt for the power battery according to the determination result; The life maintenance strategy for the power battery is determined based on the first maintenance prompt and the second maintenance prompt.

[0085] In one optional approach, the charging data includes the charging mode and charging status of the power battery for each charge within a first time period, wherein the charging mode includes fast charging and slow charging, and the charging status includes fully charged and not fully charged. Specifically, the executable instructions can also be used to cause the power battery life maintenance device / vehicle to perform the following operations: If, based on the charging modes and charging states of multiple charging cycles, it is determined that the charging mode of the power battery is fast charging for a preset number of consecutive cycles within the first time period, or the charging mode is slow charging for a preset number of consecutive cycles and the charging state is not fully charged, or there are situations of fast charging and full charging, fast charging and not fully charging, and slow charging and not fully charging within a preset number of consecutive cycles, then it is determined that the power battery meets the first charging condition.

[0086] In one alternative approach, the lifespan maintenance strategy includes at least one of the following: outputting a charging prompt for slow charging of the power battery, a strategy prompt level, and outputting the location information of available slow charging stations within a currently preset area. Specifically, the executable instructions can also be used to cause the power battery life maintenance device / vehicle to perform the following operations: If both the first maintenance prompt and the second maintenance prompt indicate that no maintenance is required, it is determined that the power battery does not require life maintenance. When the first maintenance prompt indicates that maintenance is required and the second maintenance prompt indicates that maintenance is not required, the life maintenance strategy of the power battery is determined to be to output a charging prompt for slow charging of the power battery and output the location information of available slow charging piles within the current preset area, and the level of the strategy prompt is the second level. When the first maintenance prompt indicates that no maintenance is required and the second maintenance prompt indicates that maintenance is required, the life maintenance strategy of the power battery is determined to be to output a charging prompt to slowly charge the power battery, and the prompt level of the strategy is the first level. When both the first maintenance prompt and the second maintenance prompt indicate that maintenance is required, the life maintenance strategy for the power battery is determined to be to output a charging prompt for slow charging of the power battery and output the location information of available slow charging piles within the current preset area, and the level of the strategy prompt is the third level.

[0087] In an alternative approach, the executable instructions can also be used to cause the battery life maintenance device / vehicle to perform the following operations: Under the first temperature condition, multiple voltage values ​​in the power battery are acquired and the voltage difference between each pair of voltage values ​​is calculated; The maximum voltage difference of the power battery is determined based on multiple voltage differences; The internal pressure difference of the power battery at the first temperature is determined based on the maximum voltage difference and the second preset pressure difference threshold.

[0088] In an alternative approach, the executable instructions can also be used to cause the battery life maintenance device / vehicle to perform the following operations: When the maximum voltage difference is less than the second preset voltage difference threshold, the maximum voltage difference is taken as the internal voltage difference of the power battery at the first temperature.

[0089] In an alternative approach, the executable instructions can also be used to cause the battery life maintenance device / vehicle to perform the following operations: If both the first and second maintenance prompts within the preset time period indicate that maintenance is required, and if the vehicle is in a high-voltage state or charging state, then the life maintenance strategy of the power battery is output.

[0090] In the power battery life maintenance method provided in this application embodiment, a power battery life maintenance strategy is determined based on the output of a first maintenance prompt and a second maintenance prompt. The first maintenance prompt considers the relationship between the internal pressure difference of the power battery at different temperatures and the magnitude of a first preset pressure difference threshold at the corresponding temperature. This allows for a more accurate determination of whether the internal pressure difference of the power battery is normal, avoiding misjudgments of internal pressure difference caused by the limitation of a fixed pressure difference threshold at a single temperature. Simultaneously, it considers whether the power battery's charging data meets a first charging condition. Charging data reflects the user's usual charging habits. Determining whether the first charging condition is met based on the charging data essentially means determining whether the power battery is in an unreasonable charging condition, or whether the user has poor charging habits, based on the user's charging habits. Then, a second maintenance prompt is output based on the determination result. Therefore, the power battery life maintenance strategy determined by combining the first and second maintenance prompts comprehensively considers both battery temperature and user charging habits to determine whether the power battery needs maintenance and to select an appropriate maintenance strategy. This improves the reliability and accuracy of power battery life maintenance, thereby effectively enhancing the power battery life maintenance effect.

[0091] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. The transmitted data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0092] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0093] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0094] According to one aspect of the embodiments of this application, a computer system is also provided, including a Central Processing Unit (CPU), which can perform various appropriate actions and processes based on a program stored in read-only memory (ROM) or a program loaded from storage into random access memory (RAM), such as performing the methods described above. Various programs and data required for system operation are also stored in the RAM. The CPU, ROM, and RAM are interconnected via a bus. Input / output (I / O) interfaces are also connected to the bus.

[0095] The following components are connected to the I / O interface: input components including keyboards, mice, etc.; output components including cathode ray tubes (CRTs), liquid crystal displays (LCDs), and speakers; storage components including hard drives; and communication components including network interface cards such as LAN (Local Area Network) cards and modems. The communication components perform communication processing via networks such as the Internet. Drives are also connected to the I / O interface as needed. Removable media, such as disks, optical discs, magneto-optical discs, semiconductor memories, etc., are installed on the drive as needed so that computer programs read from them can be installed into the storage components as required.

[0096] The above description is merely a preferred exemplary embodiment of this application and is not intended to limit the implementation of this application. Those skilled in the art can easily make corresponding modifications or alterations based on the main concept and spirit of this application. Therefore, the scope of protection of this application should be determined by the scope of protection claimed in the claims.

[0097] In practice, the collection and processing of data in this application should strictly comply with the requirements of relevant national laws and regulations, obtain the informed consent or separate consent of the data subject, and carry out subsequent data use and processing within the scope of laws and regulations and the authorization of the data subject.

Claims

1. A method for maintaining the lifespan of a power battery, characterized in that, The method includes: Acquire the internal pressure difference of the power battery and the charging data of the power battery at a first temperature; Based on the relationship between the internal pressure difference and the first preset pressure difference threshold corresponding to the first temperature, a first maintenance prompt is output. Based on the charging data, determine whether the power battery meets the first charging condition, and output the second maintenance prompt for the power battery according to the determination result; The life maintenance strategy for the power battery is determined based on the first maintenance prompt and the second maintenance prompt.

2. The method for maintaining the lifespan of a power battery according to claim 1, characterized in that, The charging data includes the charging mode and charging status of the power battery for each charge within the first time period. The charging mode includes fast charging and slow charging, and the charging status includes fully charged and not fully charged. The step of determining whether the power battery meets the first charging condition based on the charging data includes: If, based on the charging modes and charging states of multiple charging cycles, it is determined that the charging mode of the power battery is fast charging for a preset number of consecutive cycles within the first time period, or the charging mode is slow charging for a preset number of consecutive cycles and the charging state is not fully charged, or there are situations of fast charging and full charging, fast charging and not fully charging, and slow charging and not fully charging within a preset number of consecutive cycles, then it is determined that the power battery meets the first charging condition.

3. The method for maintaining the lifespan of a power battery according to claim 1, characterized in that, The life maintenance strategy includes at least one of the following: outputting a charging prompt for slow charging of the power battery, the level of the strategy prompt, and outputting the location information of available slow charging piles within the current preset area. The step of determining the life maintenance strategy for the power battery based on the first maintenance prompt and the second maintenance prompt includes: If both the first maintenance prompt and the second maintenance prompt indicate that no maintenance is required, it is determined that the power battery does not require life maintenance. When the first maintenance prompt indicates that maintenance is required and the second maintenance prompt indicates that maintenance is not required, the life maintenance strategy of the power battery is determined to be to output a charging prompt for slow charging of the power battery and output the location information of available slow charging piles within the current preset area, and the level of the strategy prompt is the second level. When the first maintenance prompt indicates that no maintenance is required and the second maintenance prompt indicates that maintenance is required, the life maintenance strategy of the power battery is determined to be to output a charging prompt to slowly charge the power battery, and the prompt level of the strategy is the first level. When both the first maintenance prompt and the second maintenance prompt indicate that maintenance is required, the life maintenance strategy for the power battery is determined to be to output a charging prompt for slow charging of the power battery and output the location information of available slow charging piles within the current preset area, and the level of the strategy prompt is the third level.

4. The method for maintaining the lifespan of a power battery according to claim 1, characterized in that, The step of obtaining the internal pressure difference of the power battery at the first temperature includes: Under the first temperature condition, multiple voltage values ​​in the power battery are obtained and the voltage difference between each pair of voltage values ​​is calculated; The maximum voltage difference of the power battery is determined based on multiple voltage differences; The internal pressure difference of the power battery at the first temperature is determined based on the maximum voltage difference and the second preset pressure difference threshold.

5. The method for maintaining the lifespan of a power battery according to claim 4, characterized in that, Determining the internal pressure difference of the power battery at the first temperature based on the maximum voltage difference and the second preset pressure difference threshold includes: When the maximum voltage difference is less than the second preset voltage difference threshold, the maximum voltage difference is taken as the internal voltage difference of the power battery at the first temperature.

6. The method for maintaining the lifespan of a power battery according to any one of claims 1 to 5, characterized in that, The method further includes: If both the first and second maintenance prompts within the preset time period indicate that maintenance is required, and if the vehicle is in a high-voltage state or charging state, then the life maintenance strategy of the power battery is output.

7. A life maintenance device for a power battery, characterized in that, The device includes: The acquisition module is used to acquire the internal pressure difference of the power battery at a first temperature and the charging data of the power battery; The output module is used to output a first maintenance prompt based on the relationship between the internal pressure difference and the first preset pressure difference threshold corresponding to the first temperature; The output module is also used to determine whether the power battery meets the first charging condition based on the charging data, and to output a second maintenance prompt for the power battery based on the determination result. The determination module is used to determine the life maintenance strategy of the power battery based on the first maintenance prompt and the second maintenance prompt.

8. A vehicle, characterized in that, include: Controller; A memory for storing one or more programs, which, when executed by a controller, cause the controller to implement the life maintenance method for the power battery as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when run on the power battery life maintenance device / vehicle, causes the power battery life maintenance device / vehicle to perform the steps of the power battery life maintenance method as described in any one of claims 1 to 6.

10. A computer program product, characterized in that, The computer program product includes a computer program or executable instructions, which, when executed by a processor, implement the life maintenance method for the power battery as described in any one of claims 1 to 6.

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