Battery management method, vehicle and storage medium

Abstract

The invention relates to the technical field of vehicles, and provides a battery management method, a vehicle and a storage medium. The method comprises the steps that based on multiple power parameters of the battery pack in the charging process, the predicted temperature of the battery pack in the charging process is determined, and the predicted temperature comprises the highest predicted temperature and the lowest predicted temperature; if the highest predicted temperature is larger than the temperature upper limit value of the battery pack or the lowest predicted temperature is smaller than the temperature lower limit value of the battery pack, preset thermal management parameters are adjusted; and performing thermal management on the battery pack according to the adjusted thermal management parameters. According to the method, the charging speed of the battery pack can be ensured, and energy waste caused by excessive cooling or heating of the battery pack can be avoided.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a battery management method, a vehicle and a storage medium. Background Art

[0002] With the development of new energy technologies, more and more new energy vehicles (such as hybrid vehicles) have appeared on the market, and new energy vehicles have the problem of long charging time. In order to solve this problem, low-temperature heating and high-temperature cooling methods can usually be used to charge new energy vehicles. However, if a fixed temperature threshold is used to determine whether the vehicle battery has a battery temperature that is too high or too low, it will not be possible to accurately and effectively manage the thermal performance of the vehicle battery, which will lead to low charging efficiency of the vehicle battery and waste of energy. Excessive charging time will also affect the user experience. Summary of the invention

[0003] The present application provides a battery management method, a vehicle and a storage medium to solve the technical problems of low charging efficiency and energy waste.

[0004] A first aspect of an embodiment of the present application provides a battery management method, the method comprising: determining a predicted temperature of the battery pack during the charging process based on multiple power parameters of the battery pack during the charging process, the predicted temperature comprising a maximum predicted temperature and a minimum predicted temperature; if the maximum predicted temperature is greater than an upper temperature limit value of the battery pack, or the minimum predicted temperature is less than a lower temperature limit value of the battery pack, adjusting preset thermal management parameters; and performing thermal management on the battery pack according to the adjusted thermal management parameters.

[0005] According to an embodiment of the present application, the method also includes: determining the charging current of the battery pack based on the ambient temperature of the battery pack and the charge state of the battery pack; determining the heating power of the battery pack based on the charging current, the battery internal resistance of the battery pack, the ambient temperature and the battery temperature of the battery pack when charging starts.

[0006] According to an embodiment of the present application, the battery temperature includes a maximum temperature and a minimum temperature, and the heating power of the battery pack is determined according to the charging current, the battery internal resistance, the ambient temperature and the battery temperature of the battery pack when charging starts, including: if the sum of the maximum temperature and the minimum temperature is greater than or equal to a preset multiple of the ambient temperature, or the average temperature of the battery pack is greater than or equal to a preset multiple of the ambient temperature, the heating power is calculated based on the charging current and the battery internal resistance, and the average temperature is determined based on the battery temperature; if the sum of the maximum temperature and the minimum temperature is less than the preset multiple of the ambient temperature, or the average temperature is less than the preset multiple of the ambient temperature, the heating power is calculated based on the charging current, the battery internal resistance, the battery temperature, the ambient temperature, the specific heat capacity of the battery pack, the battery mass of the battery pack and a preset time.

[0007] According to an embodiment of the present application, the battery temperature of the battery pack when charging starts includes a maximum temperature and a minimum temperature, and the method further includes: if the sum of the maximum temperature and the minimum temperature is greater than a preset multiple of the ambient temperature of the battery pack, or the average temperature of the battery pack is greater than a preset multiple of the ambient temperature, based on the battery temperature, the ambient temperature, the specific heat capacity of the battery pack, the battery mass of the battery pack and a preset time, the heat dissipation power of the battery pack is calculated, and the average temperature is determined based on the battery temperature; if the sum of the maximum temperature and the minimum temperature is less than or equal to a preset multiple of the ambient temperature, or the average temperature is less than or equal to a preset multiple of the ambient temperature, the heat dissipation power is determined as the preset power.

[0008] According to an embodiment of the present application, the method also includes: calculating the battery cooling power of the battery pack based on the thermal conductivity of the battery pack, the system cooling power of the cooling system in the thermal management system, and the thermal conductivity of the cooling system; and / or calculating the battery heating power of the battery pack based on the thermal conductivity of the battery pack, the system heating power of the heating system in the thermal management system, and the thermal conductivity of the heating system.

[0009] According to an embodiment of the present application, the predicted temperature of the battery pack during the charging process is determined based on multiple power parameters of the battery pack during the charging process, including: calculating the predicted temperature of the battery pack at a second moment based on the predicted temperature of the battery pack at a first moment, the heat generation power, heat dissipation power, battery cooling power, battery heating power, a preset duration, the specific heat capacity of the battery pack and the battery pack mass of the battery pack, the first moment being earlier than the second moment.

[0010] According to an embodiment of the present application, the adjustment of the preset thermal management parameters includes: if the highest predicted temperature is greater than the upper temperature limit of the battery pack, lowering the first temperature threshold in the thermal management parameters; if the lowest predicted temperature is less than the lower temperature limit of the battery pack, increasing the second temperature threshold in the thermal management parameters.

[0011] According to an embodiment of the present application, the thermal management of the battery pack according to the adjusted thermal management parameters includes: if the highest predicted temperature is greater than a first temperature threshold in the adjusted thermal management parameters, cooling the battery pack; if the lowest predicted temperature is less than a second temperature threshold in the adjusted thermal management parameters, heating the battery pack.

[0012] A second aspect of an embodiment of the present application provides a battery management device, the device comprising: a determination unit, for determining a predicted temperature of the battery pack during the charging process based on multiple power parameters of the battery pack during the charging process, the predicted temperature comprising a maximum predicted temperature and a minimum predicted temperature; an adjustment unit, for adjusting preset thermal management parameters if the maximum predicted temperature is greater than an upper temperature limit value of the battery pack, or the minimum predicted temperature is less than a lower temperature limit value of the battery pack; and a control unit, for performing thermal management on the battery pack according to the adjusted thermal management parameters.

[0013] A third aspect of an embodiment of the present application provides a vehicle, comprising: a memory storing a computer program; and a processor executing the computer program stored in the memory to implement the battery management method.

[0014] A fourth aspect of an embodiment of the present application provides a computer-readable storage medium, in which computer-readable instructions are stored. When the computer-readable instructions are executed by a processor, the battery management method is implemented.

[0015] In multiple embodiments of the present application, by combining multiple power parameters of the battery pack during the charging process, the predicted temperature of the battery pack during the charging process can be accurately determined. When the highest predicted temperature is greater than the upper temperature limit of the battery pack, or the lowest predicted temperature is less than the lower temperature limit of the battery pack, the thermal management parameters are dynamically adjusted so that the battery pack can be maintained in the temperature range from the lower temperature limit to the upper temperature limit during the charging process, thereby reducing the temperature fluctuation of the battery and ensuring the charging speed of the battery pack. In addition, by thermally managing the battery pack through the adjusted thermal management parameters, energy waste caused by overcooling or overheating of the battery pack can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an application scenario diagram of the battery management method provided in an embodiment of the present application.

[0017] Figure 2 It is a flow chart of the battery management method provided in an embodiment of the present application.

[0018] Figure 3 This is an example diagram of the charging current spectrum provided in the embodiment of the present application.

[0019] Figure 4 This is a flow chart of a battery management method provided by another embodiment of the present application.

[0020] Figure 5 It is a functional module diagram of the battery management device provided in an embodiment of the present application.

[0021] Figure 6 It is a structural schematic diagram of a vehicle for implementing a battery management method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] It should be noted that in this application, "at least one" means one or more, and "more than one" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0024] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way. The following embodiments and features in the embodiments may be combined with each other without conflict.

[0025] With the development of new energy technologies, more and more new energy vehicles have appeared on the market, such as electric vehicles and hybrid vehicles. The temperature of the power battery of new energy vehicles during charging usually affects the charging efficiency and life of the power battery, which in turn affects the overall performance and reliability of new energy vehicles.

[0026] At present, during the charging process of the power battery, the battery temperature is generally collected and compared with the temperature threshold preset in the thermal management system. If the power battery temperature is too high or too low, the power battery is heated or cooled.

[0027] However, this method only considers the impact of the current temperature of the power battery on the charging performance, and does not comprehensively consider other factors (for example, the charging capacity of the charging pile, the capabilities of the thermal management system). As a result, it is impossible to accurately and effectively manage the thermal performance of the power battery, which in turn leads to low charging efficiency of the vehicle battery. Overheating or overcooling the power battery will result in energy waste, and excessive charging time will also affect the user experience.

[0028] Based on the above problems, an embodiment of the present application provides a battery management method, which can accurately determine the predicted temperature of the battery pack during the charging process by combining multiple power parameters of the battery pack during the charging process. By comparing the predicted temperature of the battery pack during the charging process with the upper temperature limit of the battery pack and the lower temperature limit of the battery pack, the thermal management parameters can be dynamically adjusted so that the battery pack can be maintained in the temperature range from the lower temperature limit to the upper temperature limit during the charging process, thereby reducing the temperature fluctuation of the battery and ensuring the charging speed of the battery pack. In addition, by performing thermal management on the battery pack through the adjusted thermal management parameters, energy waste caused by excessive cooling or heating of the battery pack can be avoided.

[0029] like Figure 1 The figure shows an application scenario diagram of the battery management method provided in an embodiment of the present application.

[0030] In an embodiment of the present application, the battery management method can be applied to a vehicle 100. The vehicle 100 may include a battery pack 11, a battery management system (BMS) 12, and a thermal management system (TMS) 13. The battery pack 11, the battery management system 12, and the thermal management system 13 may all interact with each other through a communication network, and the vehicle 100 and the charging device 200 may also interact with each other through a communication network, wherein the communication mode adopted by the communication network may include: wireless communication mode and wired communication mode. Exemplarily, the charging device 200 may access the network through cellular mobile communication technology to communicate with the battery management system 12 and the thermal management system 13 in the vehicle 100, wherein the cellular mobile communication technology may include the fifth generation (5G) mobile communication technology or the next generation mobile communication technology. Optionally, the charging device 200 may also access the network through a short-range wireless communication mode to communicate with the battery management system 12 and the thermal management system 13 in the vehicle 100, wherein the short-range wireless communication mode includes wireless fidelity (Wi-Fi) technology.

[0031] In at least one embodiment of the present application, the user can send a charging instruction to the charging device 200 through the battery management system 12, and the charging device 200 inputs a charging current to the battery pack 11 and the thermal management system 13 according to the charging instruction output by the battery management system 12 and the current supply capability of the charging device 200 itself. The battery management system 12 can also send a thermal management request to the thermal management system 13 according to the predicted temperature of the battery pack 11 during the charging process and the thermal management parameters in the thermal management system 13. After receiving the thermal management request output by the battery management system 12, the thermal management system 13 can perform heating, cooling and other processing on the battery pack 11. Exemplarily, the thermal management system 13 can affect the temperature of the battery pack 11 by controlling thermal management components such as an electric compressor (ECP) or a positive temperature coefficient thermistor (PTC) or a water pump, thereby changing the sustainable charging current of the battery pack 11, and controlling the temperature of the battery pack 11 to be in a temperature range from a lower temperature limit to an upper temperature limit.

[0032] It should be noted that the battery pack 11 can directly or indirectly provide power for the vehicle 100, and is a general term for rechargeable chemical energy storage devices such as lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, lithium batteries, and supercapacitors. In particular, the battery pack 11 may include a single electrochemical battery cell, may include multiple electrochemical battery cells, may include a battery pack, etc., and is configured according to actual application conditions, and this application does not make specific limitations on this.

[0033] The charging device 200 may be a charger, a charging pile or a vehicle charger, for example Figure 1 The charging device 200 is a charging pile, which is configured according to actual application conditions, and the embodiment of the present application does not make any specific limitation on this.

[0034] The following describes the thermal management control method of the power battery provided by the exemplary embodiment of the present application in combination with the above-mentioned system architecture and with reference to the accompanying drawings. It should be noted that the above-mentioned system architecture is only shown to facilitate understanding of the spirit and principles of the present application, and the implementation of the present application is not limited in this respect.

[0035] like Figure 2 , which is a flow chart of a battery management method provided by an embodiment of the present application. The battery management method is applied in a vehicle, for example, Figure 1 The vehicle 100. According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted.

[0036] S201, determining a predicted temperature of the battery pack during the charging process based on a plurality of power parameters of the battery pack during the charging process, wherein the predicted temperature includes a maximum predicted temperature and a minimum predicted temperature.

[0037] In at least one embodiment of the present application, the ambient temperature of the battery pack can be collected by a temperature sensor in the vehicle or battery management system, and the ambient temperature of the battery pack can also be obtained through a weather forecast system, which is not specifically limited here. The state of charge (SOC) of the battery pack can indicate the remaining power of the battery pack, and the state of charge of the battery pack can be determined by the ratio of the remaining power of the battery pack to the battery capacity. The value range of the state of charge of the battery pack is 0% to 100%, where when SOC = 0%, it means that the remaining power of the battery pack is 0, and when SOC = 100%, it means that the battery pack is in a fully charged state, for example, the remaining power of the battery pack is equal to the battery capacity.

[0038] Figure 3 An example diagram of the charging current spectrum provided in the embodiment of the present application is shown in FIG. Figure 3 As shown, Figure 3The figure shows the relationship between the ambient temperature of the battery pack, the state of charge of the battery pack and the charging current of the battery pack. When the ambient temperature of the battery pack is -25℃ and the state of charge of the battery pack is 0%-95%, the charging current of the battery pack is 0A; when the ambient temperature of the battery pack is 50℃ and the state of charge of the battery pack is 0%-90%, the charging current of the battery pack is 7.2A; when the ambient temperature of the battery pack is 50℃ and the state of charge of the battery pack is 92%, the charging current of the battery pack is 5.4A; when the state of charge of the battery pack is 95%, the charging current of the battery pack is 0A regardless of the ambient temperature of the battery pack.

[0039] In at least one embodiment of the present application, the charging current of the battery pack is determined according to the ambient temperature of the battery pack and the state of charge of the battery pack. In one example, the charging current of the battery pack can be obtained from the charging current spectrum according to the ambient temperature of the battery pack and the state of charge of the battery pack. In another example, the power supply current of the charging device is determined according to the cable current carrying capacity and power supply capacity of the charging device, and the corresponding charging current is obtained from the charging current spectrum according to the ambient temperature of the battery pack and the state of charge of the battery pack. The smaller value of the corresponding charging current in the charging current spectrum and the power supply current of the charging device is used as the charging current of the battery pack. For example, the charging current corresponding to the ambient temperature and the state of charge obtained from the charging current spectrum is 5A, and the power supply current of the charging device is 4A, then the charging current of the battery pack is 4A. The embodiment of the present application can quickly determine the charging current of the battery pack from the charging current spectrum by combining the ambient temperature of the battery pack and the state of charge of the battery pack. In addition, by further combining the power supply capacity of the charging device to determine the charging current of the battery pack, the accuracy of the charging current can be improved.

[0040] In at least one embodiment of the present application, the heating power of the battery pack is determined according to the charging current, the battery internal resistance of the battery pack, the ambient temperature, and the battery temperature of the battery pack when the battery pack starts charging. Among them, the battery pack can be built-in with multiple battery cells, and the battery temperature of the battery pack when the battery pack starts charging can include the temperature of each battery cell. The temperature of different battery cells is different. The battery temperature of the battery pack when the battery pack starts charging can be acquired by the temperature sensor in the battery management system. The battery temperature of the battery pack when the battery pack starts charging can include a maximum temperature and a minimum temperature. The maximum temperature is the maximum value of the temperatures of multiple battery cells, and the minimum temperature is the minimum value of the temperatures of multiple battery cells. The average temperature of the battery pack can be determined according to the average value of the temperatures of multiple battery cells. For example, the battery pack includes 8 battery cells, and the battery temperatures of 8 battery cells when the battery pack starts charging can be collected. The average temperature of the battery pack can be obtained by calculating the average value of the battery temperatures of the 8 battery cells. The embodiment of the present application combines the charging current, the battery internal resistance of the battery pack, the ambient temperature, and the battery temperature of the battery pack when the battery pack starts charging. Since the influence of temperature on the heating power is taken into account, the accuracy of the heating power can be improved.

[0041] In one example, the process of determining the heating power of the battery pack includes: if the sum of the maximum temperature and the minimum temperature is greater than or equal to a preset multiple of the ambient temperature, or the average temperature of the battery pack is greater than or equal to a preset multiple of the ambient temperature, the heating power of the battery pack is calculated based on the charging current and the internal resistance of the battery. The preset multiple can be set according to actual needs. Usually, the preset multiple can be set to 2, which is not limited in this application. For example, if the preset multiple is 2, Indicates the maximum temperature, Indicates the minimum temperature, Indicates the ambient temperature. When the heat generation power of the battery pack is , the formula can be expressed as: ,in, It can indicate the heating power of the battery pack. It can represent the charging current of the battery pack. It can represent the battery internal resistance of the battery pack. In the embodiment of the present application, when the sum of the maximum temperature and the minimum temperature is greater than or equal to the preset multiple of the ambient temperature, or the average temperature of the battery pack is greater than or equal to the preset multiple of the ambient temperature, it can be said that the heat exchange between the battery pack and the environment is in a relatively balanced state. At this time, the influence of heat transfer caused by temperature difference on the temperature of the battery pack can be ignored. Therefore, the heating power of the battery pack can be quickly determined by the charging current of the battery pack and the battery internal resistance of the battery pack. In another example, if the sum of the maximum temperature and the minimum temperature is less than the preset multiple of the ambient temperature, or the average temperature of the battery pack is less than the preset multiple of the ambient temperature, the heating power is calculated based on the charging current, battery internal resistance, battery temperature, ambient temperature, specific heat capacity of the battery pack, battery mass of the battery pack and preset time. Among them, the preset time can be set according to user needs. For example, the preset time can be set to 10ms or 100ms. For example, if the preset multiple is 2, in When the heat generation power of the battery pack is , the formula can be expressed as: ,in, It can indicate the heating power of the battery pack. It can represent the charging current of the battery pack. It can represent the battery internal resistance of the battery pack. Can indicate ambient temperature, Can represent the maximum temperature, Can represent the minimum temperature, It can represent the specific heat capacity of the battery pack. It can indicate the battery quality of the battery pack. It can represent a preset duration. In the embodiment of the present application, when the sum of the maximum temperature and the minimum temperature is less than a preset multiple of the ambient temperature, or the average temperature of the battery pack is less than a preset multiple of the ambient temperature, it can indicate that heat exchange occurs between the battery pack and the environment. Therefore, by combining the ambient temperature, the battery temperature, the specific heat capacity of the battery pack and the battery mass, the heat generation power of the battery pack can be accurately determined. In at least one embodiment of the present application, the heat dissipation power of the battery pack can be determined based on the ambient temperature, the battery temperature of the battery pack when charging starts, and the preset power.

[0042] In one example, if the sum of the maximum temperature and the minimum temperature is greater than a preset multiple of the ambient temperature of the battery pack, or the average temperature of the battery pack is greater than a preset multiple of the ambient temperature, the heat dissipation power of the battery pack is calculated based on the battery temperature, ambient temperature, specific heat capacity of the battery pack, battery mass of the battery pack, and preset duration. For example, if the preset multiple is 2, When the heat dissipation power of the battery pack is , the calculation formula can be expressed as: ,in, It can represent the heat dissipation power of the battery pack. Can indicate ambient temperature, Can indicate the maximum temperature, Can represent the minimum temperature, It can represent the specific heat capacity of the battery pack. It can indicate the battery quality of the battery pack. In the embodiment of the present application, when the sum of the maximum temperature and the minimum temperature is greater than a preset multiple of the ambient temperature of the battery pack, or the average temperature of the battery pack is greater than a preset multiple of the ambient temperature, it can indicate that heat exchange occurs between the battery pack and the environment. Therefore, by combining the ambient temperature, battery temperature, specific heat capacity of the battery pack and battery mass, the heat dissipation power of the battery pack can be accurately determined.

[0043] In another example, if the sum of the maximum temperature and the minimum temperature is less than or equal to a preset multiple of the ambient temperature, or the average temperature of the battery pack is less than or equal to a preset multiple of the ambient temperature, the heat dissipation power is determined as the preset power. The preset power can be set according to actual needs, for example, the preset power can be set to 0. In the embodiment of the present application, when the sum of the maximum temperature and the minimum temperature is less than or equal to a preset multiple of the ambient temperature, or the average temperature of the battery pack is less than or equal to a preset multiple of the ambient temperature, it can be indicated that the heat exchange between the battery pack and the environment is in a relatively balanced state. At this time, the influence of heat transfer caused by temperature difference on the battery pack temperature can be ignored. Therefore, by determining the preset power as the heat dissipation power, the efficiency of determining the heat dissipation power can be improved.

[0044] In at least one embodiment of the present application, the thermal management system includes a cooling system, which can be used to cool the battery pack. The battery cooling power of the battery pack is calculated based on the thermal conductivity of the battery pack, the system cooling power of the cooling system, and the thermal conductivity of the cooling system. Among them, the system cooling power can be determined based on the cooling capacity of the cooling system, and the thermal conductivity of the cooling system can be determined based on the material of the cooling system. In one example, when the cooling system cools the battery pack, the battery cooling power can be determined by multiplying the thermal conductivity of the battery pack, the system cooling power, and the thermal conductivity of the cooling system. In another example, when the cooling system does not start the cooling function, the battery cooling power is 0. The embodiment of the present application can accurately determine the battery cooling power of the battery pack when the cooling system cools the battery pack through the thermal conductivity of the battery pack, the system cooling power of the cooling system, and the thermal conductivity; in addition, when the cooling system does not start the cooling function, it indicates that the cooling system is not running, so the battery cooling power is determined to be 0, which improves the accuracy of the battery cooling power.

[0045] In at least one embodiment of the present application, the thermal management system further includes a heating system, which can be used to heat the battery pack. Based on the thermal conductivity of the battery pack, the system heating power of the heating system and the thermal conductivity of the heating system, the battery heating power of the battery pack is calculated. Among them, the system heating power can be determined based on the heating capacity of the heating system, and the thermal conductivity of the heating system can be determined based on the material of the heating system. In one example, when the heating system heats the battery pack, the battery heating power can be determined by multiplying the thermal conductivity of the battery pack, the system heating power and the thermal conductivity of the heating system. In another example, when the heating system does not start the heating function, the battery heating power is 0. The embodiment of the present application can accurately determine the battery heating power of the battery pack when the heating system heats the battery pack through the thermal conductivity of the battery pack, the system heating power and the thermal conductivity of the heating system; in addition, when the heating system does not start the heating function, it indicates that the heating system is not running, so the battery heating power is determined to be 0, which improves the accuracy of the battery heating power.

[0046] In at least one embodiment of the present application, the multiple power parameters may include, but are not limited to: heat generation power, heat dissipation power, battery cooling power, and battery heating power of the battery pack.

[0047] In at least one embodiment of the present application, based on multiple power parameters of the battery pack during the charging process, the predicted temperature of the battery pack during the charging process is determined, including: based on the predicted temperature of the battery pack at the first moment, the heating power of the battery pack, the heat dissipation power, the battery cooling power, the battery heating power, the preset time, the specific heat capacity of the battery pack and the battery pack mass of the battery pack, the predicted temperature of the battery pack at the second moment is calculated, and the first moment is earlier than the second moment. Among them, the calculation formula of the predicted temperature of the battery pack during the charging process can be expressed as: ,in, It can be said that the battery pack is The predicted temperature at the time, It can be said that the battery pack is The predicted temperature at the time, , is the battery temperature of the battery pack when charging starts. It can indicate the heating power of the battery pack. It can represent the heat dissipation power of the battery pack. It can represent the battery heating power of the battery pack. It can represent the battery cooling power of the battery pack. It can represent the specific heat capacity of the battery pack. It can indicate the battery quality of the battery pack. The embodiment of the present application combines multiple power parameters of the battery pack during the charging process, and can comprehensively consider the influence of multiple factors on the predicted temperature of the battery pack, thereby improving the accuracy of the predicted temperature.

[0048] S202: If the highest predicted temperature is greater than the upper temperature limit of the battery pack, or the lowest predicted temperature is less than the lower temperature limit of the battery pack, adjust the preset thermal management parameters.

[0049] In at least one embodiment of the present application, the maximum predicted temperature and the minimum predicted temperature are determined based on the predicted temperatures of the battery pack at multiple times during the charging process. The upper temperature limit of the battery pack indicates the maximum temperature that the battery pack can withstand during the charging process and still maintain a relatively stable charging speed. If the predicted temperature of the battery pack during the charging process is greater than the upper temperature limit, the charging speed of the battery pack will be limited. The lower temperature limit of the battery pack indicates the lowest temperature that the battery pack can withstand during the charging process and still maintain a relatively stable charging speed. If the predicted temperature of the battery pack during the charging process is less than the lower temperature limit, the charging speed of the battery pack will be limited.

[0050] In at least one embodiment of the present application, the preset thermal management parameters can be pre-set according to actual needs, and the preset thermal management parameters may include a first temperature threshold and a second temperature threshold. The first temperature threshold can be used to control the cooling of the battery pack, and the second temperature threshold can be used to control the heating of the battery pack.

[0051] In at least one embodiment of the present application, the preset thermal management parameters are adjusted, including: if the highest predicted temperature is greater than the upper temperature limit of the battery pack, lowering the first temperature threshold in the thermal management parameters; if the lowest predicted temperature is less than the lower temperature limit of the battery pack, increasing the second temperature threshold in the thermal management parameters.

[0052] In one example, the thermal management parameters may be adjusted according to a preset step size, wherein the preset step size may be set and adjusted according to actual needs, for example, the preset step size may be set to 1°C.

[0053] In the embodiment of the present application, when the highest predicted temperature is greater than the upper temperature limit of the battery pack, by lowering the first temperature threshold, the standard for enabling the cooling function can be lowered, further avoiding the highest predicted temperature of the battery pack during the charging process being greater than the upper temperature limit of the battery pack; when the lowest predicted temperature is less than the lower temperature limit of the battery pack, by increasing the second temperature threshold, the standard for enabling the heating function can be lowered, further avoiding the lowest predicted temperature of the battery pack during the charging process being less than the lower temperature limit of the battery pack, so that the predicted temperature of the battery pack during the charging process can be stabilized in the temperature range from the lower temperature limit to the upper temperature limit, thereby ensuring the charging speed of the battery pack. In addition, the embodiment of the present application can reasonably adjust the thermal management parameters through the lower temperature limit and the upper temperature limit, avoiding excessive heating or excessive cooling of the battery pack caused by unreasonable adjusted thermal management parameters, thereby avoiding energy waste.

[0054] S203, performing thermal management on the battery pack according to the adjusted thermal management parameters.

[0055] In at least one embodiment of the present application, the battery pack is thermally managed according to the adjusted thermal management parameters, including: if the highest predicted temperature is greater than the first temperature threshold in the adjusted thermal management parameters, the battery pack is cooled; if the lowest predicted temperature is less than the second temperature threshold in the adjusted thermal management parameters, the battery pack is heated.

[0056] In one example, if the highest predicted temperature is greater than the first temperature threshold in the adjusted thermal management parameters, the battery management system sends a cooling request to the thermal management system, and the thermal management system cools the battery pack by controlling thermal management components such as an electric compressor (ECP) or a positive temperature coefficient thermistor (PTC) or a water pump. In the embodiment of the present application, when the highest predicted temperature is greater than the first temperature threshold in the adjusted thermal management parameters, the battery pack is cooled so that the battery temperature can be maintained in a temperature range from the lower temperature limit to the upper temperature limit, thereby improving the charge and discharge efficiency of the battery pack; in addition, by controlling the battery temperature in a temperature range from the lower temperature limit to the upper temperature limit, the aging process of the battery pack can be slowed down, the number of charge and discharge times of the battery pack can be increased, and the overall service life of the battery pack can be extended. In another example, if the lowest predicted temperature is less than the second temperature threshold in the adjusted thermal management parameters, the battery management system sends a heating request to the thermal management system, and the thermal management system heats the battery pack by controlling thermal management components such as an electric compressor (ECP) or a positive temperature coefficient thermistor (PTC) or a water pump. In the embodiment of the present application, when the lowest predicted temperature is less than the second temperature threshold in the adjusted thermal management parameters, by heating the battery pack, the activity inside the battery pack can be increased, so that the battery pack can be normally charged and discharged in a low temperature environment, and the performance of the battery pack in low temperature conditions can be improved; in addition, by heating the battery pack, the degree of polarization can be reduced, the charging efficiency of the battery pack can be improved, and the charging time can be shortened, so that the battery pack can be quickly and efficiently fully charged in a low temperature environment.

[0057] In at least one embodiment of the present application, after thermal management of the battery pack is performed according to the adjusted thermal management parameters, step S201 can be executed so that the predicted temperature of the battery pack during charging is within a temperature range from a lower temperature value to an upper temperature value, thereby ensuring the charging speed of the battery pack.

[0058] In multiple embodiments of the present application, by combining multiple power parameters of the battery pack during the charging process, the predicted temperature of the battery pack during the charging process can be accurately determined. When the highest predicted temperature is greater than the upper temperature limit of the battery pack, or the lowest predicted temperature is less than the lower temperature limit of the battery pack, the thermal management parameters are dynamically adjusted so that the battery pack can be maintained in the temperature range from the lower temperature limit to the upper temperature limit during the charging process, thereby reducing the temperature fluctuation of the battery and ensuring the charging speed of the battery pack. In addition, by thermally managing the battery pack through the adjusted thermal management parameters, energy waste caused by overcooling or overheating of the battery pack can be avoided.

[0059] like Figure 4 FIG. 1 is a flow chart of a battery management method provided by another embodiment of the present application. The battery management method is applied to a vehicle, for example, Figure 1 The vehicle 100. According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted.

[0060] S401, when the battery pack has no charging fault and is not in a fully charged state, determine the predicted temperature of the battery pack during the charging process based on multiple power parameters of the battery pack during the charging process, the predicted temperature including the maximum predicted temperature and the minimum predicted temperature.

[0061] In at least one embodiment of the present application, if the battery management system and / or the battery pack fails, it is determined that the battery pack has a charging failure. If the battery management system and the battery pack do not fail, it is determined that the battery pack does not have a charging failure.

[0062] In at least one embodiment of the present application, if the state of charge of the battery pack is 100%, it is determined that the battery pack is in a fully charged state. If the state of charge of the battery pack is not 100%, it is determined that the battery pack is not in a fully charged state.

[0063] In at least one embodiment of the present application, based on multiple power parameters of the battery pack during the charging process, the method for determining the predicted temperature of the battery pack during the charging process can refer to the details of step S201, and the present application will not repeat it.

[0064] S402, determining whether the highest predicted temperature is greater than the upper temperature limit of the battery pack, and determining whether the lowest predicted temperature is less than the lower temperature limit of the battery pack.

[0065] In at least one embodiment of the present application, the upper temperature limit of the battery pack represents the maximum temperature that the battery pack can withstand during the charging process and still maintain a relatively stable charging speed, and the lower temperature limit of the battery pack represents the minimum temperature that the battery pack can withstand during the charging process and still maintain a relatively stable charging speed.

[0066] In at least one embodiment of the present application, if the highest predicted temperature is less than or equal to the upper temperature limit of the battery pack, and the lowest predicted temperature is greater than or equal to the lower temperature limit of the battery pack, execute step S403; if the highest predicted temperature is greater than the upper temperature limit of the battery pack, or the lowest predicted temperature is less than the lower temperature limit of the battery pack, execute step S404.

[0067] S403, continue charging the battery pack.

[0068] In at least one embodiment of the present application, if the highest predicted temperature is less than or equal to the upper temperature limit of the battery pack, and the lowest predicted temperature is greater than or equal to the lower temperature limit of the battery pack, it may indicate that the temperature of the battery pack during the charging process is always in the temperature range from the lower temperature limit to the upper temperature limit, thereby ensuring the charging speed of the battery pack.

[0069] S404, adjusting preset thermal management parameters.

[0070] S405, performing thermal management on the battery pack according to the adjusted thermal management parameters.

[0071] In at least one embodiment of the present application, after thermal management of the battery pack is performed according to the adjusted thermal management parameters, step S401 is performed.

[0072] For details of steps S404-S405, please refer to the above Figure 2 The detailed description of steps S202-S203 is not repeated here.

[0073] In multiple embodiments of the present application, when the battery pack does not have a charging fault and is not in a fully charged state, the predicted temperature of the battery pack during the charging process is determined, which can ensure that the predicted temperature of the battery pack is determined when the charging conditions are met, thereby improving the effectiveness of determining the predicted temperature; at the same time, by integrating multiple power parameters of the battery pack during the charging process, the predicted temperature of the battery pack during the charging process can be accurately determined. When the highest predicted temperature is greater than the upper temperature limit of the battery pack, or the lowest predicted temperature is less than the lower temperature limit of the battery pack, the thermal management parameters are dynamically adjusted so that the temperature of the battery pack during the charging process can be maintained in the temperature range from the lower temperature limit to the upper temperature limit, thereby reducing the temperature fluctuation of the battery and ensuring the charging speed of the battery pack. In addition, by thermally managing the battery pack through the adjusted thermal management parameters, energy waste caused by overcooling or overheating of the battery pack can be avoided.

[0074] like Figure 5 , which is a functional module diagram of a battery management device provided in an embodiment of the present application. The battery management device 51 is operated in a vehicle. The battery management device 51 includes a determination unit 510, an adjustment unit 511, a control unit 512, and a calculation unit 513. The module / unit referred to in the present application refers to a type of device that can be controlled by a processor (e.g. Figure 6 A series of computer program segments that can perform fixed functions and are stored in a memory (e.g., Figure 6 The memory 62 is shown.

[0075] A determination unit 510 is used to determine a predicted temperature of the battery pack during the charging process based on multiple power parameters of the battery pack during the charging process, wherein the predicted temperature includes a maximum predicted temperature and a minimum predicted temperature; an adjustment unit 511 is used to adjust preset thermal management parameters if the maximum predicted temperature is greater than an upper temperature limit of the battery pack, or the minimum predicted temperature is less than a lower temperature limit of the battery pack; and a control unit 512 is used to perform thermal management on the battery pack according to the adjusted thermal management parameters.

[0076] In one embodiment, the determination unit 510 is further used to determine the charging current of the battery pack based on the ambient temperature of the battery pack and the charge state of the battery pack; the determination unit 510 is further used to determine the heating power of the battery pack based on the charging current, the battery internal resistance of the battery pack, the ambient temperature and the battery temperature of the battery pack when charging starts.

[0077] In one embodiment, the battery temperature includes a maximum temperature and a minimum temperature, and the determination unit 510 is specifically used to: if the sum of the maximum temperature and the minimum temperature is greater than or equal to a preset multiple of the ambient temperature, or the average temperature of the battery pack is greater than or equal to a preset multiple of the ambient temperature, calculate the heating power based on the charging current and the internal resistance of the battery, and the average temperature is determined based on the battery temperature; if the sum of the maximum temperature and the minimum temperature is less than the preset multiple of the ambient temperature, or the average temperature is less than the preset multiple of the ambient temperature, calculate the heating power based on the charging current, the internal resistance of the battery, the battery temperature, the ambient temperature, the specific heat capacity of the battery pack, the battery mass of the battery pack and the preset duration.

[0078] In one embodiment, the battery temperature of the battery pack when charging starts includes a maximum temperature and a minimum temperature. The calculation unit 513 is used to calculate the heat dissipation power of the battery pack based on the battery temperature, the ambient temperature, the specific heat capacity of the battery pack, the battery mass of the battery pack and the preset time if the sum of the maximum temperature and the minimum temperature is greater than a preset multiple of the ambient temperature of the battery pack, or the average temperature of the battery pack is greater than the preset multiple of the ambient temperature, and the average temperature is determined based on the battery temperature. The determination unit 510 is also used to determine the heat dissipation power as the preset power if the sum of the maximum temperature and the minimum temperature is less than or equal to the preset multiple of the ambient temperature, or the average temperature is less than or equal to the preset multiple of the ambient temperature.

[0079] In one embodiment, the calculation unit 513 is further used to calculate the battery cooling power of the battery pack based on the thermal conductivity of the battery pack, the system cooling power of the cooling system in the thermal management system, and the thermal conductivity of the cooling system; and / or the calculation unit 513 is further used to calculate the battery heating power of the battery pack based on the thermal conductivity of the battery pack, the system heating power of the heating system in the thermal management system, and the thermal conductivity of the heating system.

[0080] In one embodiment, the determination unit 510 is specifically used to calculate the predicted temperature of the battery pack at the second moment based on the predicted temperature of the battery pack at the first moment, the heat generation power, heat dissipation power, battery cooling power, battery heating power, preset duration, specific heat capacity of the battery pack and battery pack mass of the battery pack, the first moment being earlier than the second moment.

[0081] In one embodiment, the adjustment unit 511 is specifically used to: if the highest predicted temperature is greater than the upper temperature limit of the battery pack, lower the first temperature threshold in the thermal management parameter; if the lowest predicted temperature is less than the lower temperature limit of the battery pack, increase the second temperature threshold in the thermal management parameter.

[0082] In one embodiment, the control unit 512 is specifically used to: cool the battery pack if the highest predicted temperature is greater than the first temperature threshold in the adjusted thermal management parameters; and heat the battery pack if the lowest predicted temperature is less than the second temperature threshold in the adjusted thermal management parameters.

[0083] In multiple embodiments of the present application, by combining multiple power parameters of the battery pack during the charging process, the predicted temperature of the battery pack during the charging process can be accurately determined. When the highest predicted temperature is greater than the upper temperature limit of the battery pack, or the lowest predicted temperature is less than the lower temperature limit of the battery pack, the thermal management parameters are dynamically adjusted so that the battery pack can be maintained in the temperature range from the lower temperature limit to the upper temperature limit during the charging process, thereby reducing the temperature fluctuation of the battery and ensuring the charging speed of the battery pack. In addition, by thermally managing the battery pack through the adjusted thermal management parameters, energy waste caused by overcooling or overheating of the battery pack can be avoided.

[0084] like Figure 6 The figure is a schematic diagram of the structure of a vehicle of a preferred embodiment of the battery management method of the present application.

[0085] In one embodiment of the present application, the vehicle 100 includes, but is not limited to, a memory 62 , a processor 61 , and a computer program stored in the memory 62 and executable on the processor 61 , such as a battery management program.

[0086] Those skilled in the art will appreciate that the schematic diagram is merely an example of the vehicle 100 and does not constitute a limitation on the vehicle 100 , which may include more or fewer components than shown in the diagram, or a combination of certain components, or different components. For example, the vehicle 100 may also include input and output devices, network access devices, buses, etc.

[0087] The processor 61 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor 61 is the computing core and control center of the vehicle 100, and uses various interfaces and lines to connect various parts of the entire vehicle 100, and obtain the operating system of the vehicle 100 and various installed applications, program codes, etc.

[0088] The processor 61 obtains the operating system of the vehicle 100 and various installed applications. The processor 61 obtains the application to implement the steps in the above-mentioned various battery management method embodiments, for example Figure 2 , Figure 4 Steps shown.

[0089] Exemplarily, the computer program may be divided into one or more modules / units, one or more modules / units are stored in the memory 62, and are obtained by the processor 61 to complete the present application. One or more modules / units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the acquisition process of the computer program in the vehicle 100.

[0090] The memory 62 can be used to store computer programs and / or modules. The processor 61 implements various functions of the vehicle 100 by running or acquiring computer programs and / or modules stored in the memory 62, and calling data stored in the memory 62. The memory 62 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the vehicle, etc. In addition, the memory 62 can include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0091] The memory 62 may be an external memory and / or an internal memory of the vehicle 100. Furthermore, the memory 62 may be a memory in a physical form, such as a memory stick, a TF card (Trans-flash Card), and the like.

[0092] If the module / unit integrated in the vehicle 100 is implemented in the form of a software functional unit and sold or used as an independent workpiece, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of each of the above-mentioned method embodiments can be implemented.

[0093] The computer program includes computer program code, which may be in source code form, object code form, executable file or some intermediate form, etc. Computer readable media may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM).

[0094] The memory 62 can be used to store computer programs and / or modules. The processor 61 implements various functions of the vehicle 100 by running or executing the computer programs and / or modules stored in the memory 62 and calling the data stored in the memory 62. The memory 62 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the vehicle, etc. The memory 62 can include non-volatile and volatile memories, such as: a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other storage devices.

[0095] Exemplarily, the computer program may be divided into one or more modules / units, one or more modules / units are stored in the memory 62, and executed by the processor 61 to complete the present application. One or more modules / units may be a series of computer program segments capable of completing specific functions, and the computer program segments are used to describe the execution process of the computer program in the vehicle 100. For example, the computer program may be divided into a determination unit 510, an adjustment unit 511, a control unit 512, and a calculation unit 513.

[0096] For details on the functions of each module / unit, please refer to the above Figure 2 , Figure 4 The detailed description is not repeated here.

[0097] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules is only a logical function division, and there may be other division methods in actual implementation.

[0098] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0099] In addition, each functional module in each embodiment of the present application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0100] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present application is limited by the appended claims rather than the above description, so it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application. Any attached figure mark in the claims should not be regarded as limiting the claims involved.

[0101] In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A battery management method, characterized in that: The method comprises: Determining a predicted temperature of the battery pack during the charging process based on a plurality of power parameters of the battery pack during the charging process, wherein the predicted temperature includes a maximum predicted temperature and a minimum predicted temperature; If the highest predicted temperature is greater than the upper temperature limit of the battery pack, or the lowest predicted temperature is less than the lower temperature limit of the battery pack, adjusting the preset thermal management parameters; The battery pack is thermally managed according to the adjusted thermal management parameters.

2. The battery management method according to claim 1, characterized in that: The method further comprises: Determining a charging current of the battery pack according to an ambient temperature of the battery pack and a state of charge of the battery pack; The heating power of the battery pack is determined according to the charging current, the battery internal resistance of the battery pack, the ambient temperature, and the battery temperature of the battery pack when charging starts.

3. The battery management method according to claim 2, characterized in that: The battery temperature includes a maximum temperature and a minimum temperature, and determining the heating power of the battery pack according to the charging current, the battery internal resistance, the ambient temperature, and the battery temperature of the battery pack when charging starts includes: If the sum of the maximum temperature and the minimum temperature is greater than or equal to a preset multiple of the ambient temperature, or the average temperature of the battery pack is greater than or equal to a preset multiple of the ambient temperature, the heating power is calculated based on the charging current and the internal resistance of the battery, and the average temperature is determined based on the battery temperature; If the sum of the maximum temperature and the minimum temperature is less than a preset multiple of the ambient temperature, or the average temperature is less than a preset multiple of the ambient temperature, the heating power is calculated based on the charging current, the battery internal resistance, the battery temperature, the ambient temperature, the specific heat capacity of the battery pack, the battery mass of the battery pack and a preset duration.

4. The battery management method according to claim 1, characterized in that: The battery temperature of the battery pack at the start of charging includes a maximum temperature and a minimum temperature, and the method further includes: If the sum of the maximum temperature and the minimum temperature is greater than a preset multiple of the ambient temperature of the battery pack, or the average temperature of the battery pack is greater than a preset multiple of the ambient temperature, the heat dissipation power of the battery pack is calculated based on the battery temperature, the ambient temperature, the specific heat capacity of the battery pack, the battery mass of the battery pack, and a preset duration, and the average temperature is determined based on the battery temperature; If the sum of the maximum temperature and the minimum temperature is less than or equal to a preset multiple of the ambient temperature, or the average temperature is less than or equal to a preset multiple of the ambient temperature, the heat dissipation power is determined as a preset power.

5. The battery management method according to claim 1, characterized in that: The method further comprises: Calculating a battery cooling power of the battery pack based on a thermal conductivity of the battery pack, a system cooling power of a cooling system in a thermal management system, and a thermal conductivity of the cooling system; and / or The battery heating power of the battery pack is calculated based on the thermal conductivity of the battery pack, the system heating power of the heating system in the thermal management system, and the thermal conductivity of the heating system.

6. The battery management method according to claim 1, characterized in that: The step of determining the predicted temperature of the battery pack during the charging process based on a plurality of power parameters of the battery pack during the charging process includes: Based on the predicted temperature of the battery pack at the first moment, the heat generation power, heat dissipation power, battery cooling power, battery heating power, preset duration, specific heat capacity of the battery pack and the battery pack mass of the battery pack, the predicted temperature of the battery pack at the second moment is calculated, the first moment being earlier than the second moment.

7. The battery management method according to claim 1, characterized in that: The adjusting of the preset thermal management parameters includes: If the highest predicted temperature is greater than the upper temperature limit of the battery pack, lowering the first temperature threshold in the thermal management parameter; If the lowest predicted temperature is less than the lower limit of the temperature of the battery pack, the second temperature threshold in the thermal management parameter is increased.

8. The battery management method according to claim 1, characterized in that: The thermal management of the battery pack according to the adjusted thermal management parameters includes: If the highest predicted temperature is greater than a first temperature threshold in the adjusted thermal management parameter, cooling the battery pack; If the lowest predicted temperature is less than a second temperature threshold in the adjusted thermal management parameter, the battery pack is heated.

9. A vehicle, characterized in that: include: A memory and a processor, wherein the memory stores a computer program, and the processor implements the battery management method according to any one of claims 1 to 8 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-readable instructions, and when the computer-readable instructions are executed by a processor, the battery management method according to any one of claims 1 to 8 is implemented.

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