Battery management method, vehicle, and storage medium

Abstract

The application relates to the technical field of vehicles and provides a battery management method, a vehicle and a storage medium. The method comprises the following steps: determining a predicted temperature of a battery pack in a charging process based on a plurality of power parameters of the battery pack in the charging process, wherein the predicted temperature comprises a maximum predicted temperature and a minimum predicted temperature; if the maximum predicted temperature is greater than an upper limit value of the temperature of the battery pack or the minimum predicted temperature is less than a lower limit value of the temperature of the battery pack, adjusting a preset thermal management parameter; and performing thermal management on the battery pack according to the adjusted thermal management parameter. The method can not only ensure the charging speed of the battery pack, but also avoid energy waste caused by excessive cooling or heating of the battery pack.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a battery management method, a vehicle and a storage medium. BACKGROUND

[0002] With the development of new energy technology, more and more new energy vehicles (for example, hybrid vehicles) appear on the market, and the new energy vehicles have the problem of long charging time. In order to solve this problem, the method of low-temperature heating and high-temperature cooling can be usually used to charge the new energy vehicles. However, if the fixed temperature threshold is used to determine whether the battery temperature of the vehicle is too high or too low, the vehicle battery cannot be accurately and effectively managed, which leads to low charging efficiency of the vehicle battery and energy waste, and the long charging time also affects the user experience. SUMMARY

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

[0005] According to the embodiment of the present application, 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; and determining a heat generation power of the battery pack according to the charging current, a battery internal resistance of the battery pack, the ambient temperature and a battery temperature of the battery pack at the beginning of charging.

[0006] According to the embodiment of the present application, the battery temperature includes a maximum temperature and a minimum temperature, and the method further comprises: if the sum of the maximum temperature and the minimum temperature is greater than a preset multiple of the ambient temperature or the average temperature of the battery pack is greater than a preset multiple of the ambient temperature, calculating 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 a preset time length, the average temperature being determined based on the battery temperature; and 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, determining the heat dissipation power as a preset power.

[0007] According to the embodiment of the present application, the battery temperature of the battery pack at the beginning of charging includes a maximum temperature and a minimum temperature, and the method further comprises: if the sum of the maximum temperature and the minimum temperature is greater than a preset multiple of the ambient temperature in which the battery pack is located or the average temperature of the battery pack is greater than a preset multiple of the ambient temperature, calculating 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 a preset time length, the average temperature being determined based on the battery temperature; and 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, determining the heat dissipation power as a preset power.

[0008] According to the embodiment of the present application, the method further comprises: calculating the battery cooling power of the battery pack based on the thermal conductivity of the battery pack, the system cooling power of a 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 a heating system in the thermal management system and the thermal conductivity of the heating system.

[0009] According to the embodiment of the present application, the method further comprises: calculating the battery cooling power of the battery pack based on the thermal conductivity of the battery pack, the system cooling power of a 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 a heating system in the thermal management system and the thermal conductivity of the heating system.

[0010] According to an embodiment of the present application, the adjusting the preset thermal management parameter comprises: if the maximum predicted temperature is greater than the upper limit of the temperature of the battery pack, decreasing a first temperature threshold in the thermal management parameter; and if the minimum predicted temperature is less than the lower limit of the temperature of the battery pack, increasing a second temperature threshold in the thermal management parameter.

[0011] According to an embodiment of the present application, the performing thermal management on the battery pack according to the adjusted thermal management parameter comprises: if the maximum predicted temperature is greater than the first temperature threshold in the adjusted thermal management parameter, cooling the battery pack; and if the minimum predicted temperature is less than the second temperature threshold in the adjusted thermal management parameter, 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 configured to determine a predicted temperature of a battery pack in a charging process based on a plurality of power parameters of the battery pack in the charging process, the predicted temperature comprising a maximum predicted temperature and a minimum predicted temperature; an adjustment unit configured to adjust a preset thermal management parameter if the maximum predicted temperature is greater than an upper limit of the temperature of the battery pack or the minimum predicted temperature is less than a lower limit of the temperature of the battery pack; and a control unit configured to perform thermal management on the battery pack according to the adjusted thermal management parameter.

[0013] A third aspect of an embodiment of the present application provides a vehicle, the vehicle comprising: a memory configured to store a computer program; and a processor configured to execute 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, the computer readable storage medium storing computer readable instructions, the computer readable instructions being executed by a processor to implement the battery management method.

[0015] In the embodiments of the present application, the predicted temperature of the battery pack in the charging process can be accurately determined by combining the plurality of power parameters of the battery pack in the charging process. When the maximum predicted temperature is greater than the upper limit of the temperature of the battery pack or the minimum predicted temperature is less than the lower limit of the temperature of the battery pack, the thermal management parameter is dynamically adjusted, so that the battery pack can be kept in the temperature range from the lower limit of the temperature to the upper limit of the temperature in the charging process, thereby reducing the temperature fluctuation of the battery and ensuring the charging speed of the battery pack. In addition, the thermal management on the battery pack according to the adjusted thermal management parameter can avoid energy waste caused by excessive cooling or excessive heating of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is an application scenario diagram of a battery management method provided by an embodiment of the present application.

[0017] Figure 2 is a flowchart of a battery management method provided by an embodiment of the present application.

[0018] Figure 3 is an example diagram of a charging current map provided by an embodiment of the present application.

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

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

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

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

[0023] It should be noted that, in the present application, “at least one” means one or more, and “multiple” means two or more than two. “And / or” describes the association between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The terms “first”, “second”, “third”, “fourth” and the like (if any) in the specification and claims of the present application and the drawings are used to distinguish similar objects, and are not used to describe a specific order or sequence.

[0024] In the embodiments of the present application, the words “exemplary” or “for example” are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as “exemplary” or “for example” in the embodiments of the present application should not be interpreted as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of “exemplary” or “for example” is intended to present relevant concepts in a specific manner. The embodiments described below and the features in the embodiments can be combined with each other without conflict, if possible.

[0025] With the development of new energy technology, more and more new energy vehicles appear on the market, for example, electric vehicles and hybrid vehicles. The temperature of the power battery of the new energy vehicle during charging usually affects the charging efficiency and service life of the power battery, and thus affects the overall performance and reliability of the new energy vehicle.

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

[0027] However, this method only considers the influence 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 and the capacity of the thermal management system), resulting in that the power battery cannot be accurately and effectively managed, and thus the charging efficiency of the vehicle battery is low, and excessive heating or cooling of the power battery will cause energy waste, and the long charging time will also affect the user experience.

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

[0029] As Figure 1 shown is an application scenario diagram of the battery management method provided by the embodiments of the present application.

[0030] In the embodiments of the present application, the battery management method can be applied to the vehicle 100. The vehicle 100 can 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 can all interact information through a communication network, and the vehicle 100 and the charging device 200 can also interact information through the communication network, wherein the communication network can adopt a communication mode including a wireless communication mode and a wired communication mode. For example, the charging device 200 can access the network through a 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 can be a fifth generation (5G) mobile communication technology or a next generation mobile communication technology. Optionally, the charging device 200 can 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 a 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 in combination with the current providing capability of the charging device 200. 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 in the charging process and the thermal management parameter 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 heat, cool, or the like to the battery pack 11. For example, the thermal management system 13 can control the temperature of the battery pack 11 by controlling the thermal management components such as an electric compressor (ECP), a positive temperature coefficient (PTC), or a water pump, so as to change the sustainable charging current size of the battery pack 11 and control the temperature of the battery pack 11 to be in a temperature interval from a lower limit value to an upper limit value.

[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 of rechargeable chemical energy storage devices such as lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, lithium batteries, and supercapacitors. In particular, the battery pack 11 can include a single electrochemical cell, a plurality of electrochemical cells, a battery pack, or the like, and is not specifically limited in this regard by the present application.

[0033] The charging device 200 can be a charger, a charging pile, or a vehicle-mounted charger, etc. For example, the charging device 200 in Figure 1 is a charging pile, and the embodiments of the present application do not specifically limit this according to actual application.

[0034] The power battery thermal management control method provided by the exemplary embodiments of the present application will be described below in conjunction with the above system architecture and in reference to the accompanying drawings. It should be noted that the above system architecture is only shown for the purpose of facilitating understanding of the spirit and principles of the present application, and the embodiments of the present application are not limited in this regard.

[0035] As shown in Figure 2 , it is a flowchart of the battery management method provided by the embodiments of the present application. The battery management method is applied in a vehicle, for example, the vehicle 100 in Figure 1 . The order of steps in the flowchart can be changed according to different needs, and some steps can be omitted.

[0036] S201, based on a plurality of power parameters of the battery pack during the charging process, determining a predicted temperature of the battery pack during the charging process, the predicted temperature including a highest predicted temperature and a lowest predicted temperature.

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

[0038] Figure 3 An example of the charging current map provided by the embodiments of the present application is shown in Figure 3 , and Figure 3The 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 is shown. 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%, no matter what the ambient temperature of the battery pack is, the charging current of the battery pack is 0A.

[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 an example, the charging current of the battery pack can be obtained from the charging current map through 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 map through 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 map and the power supply current of the charging device is taken as the charging current of the battery pack. For example, the charging current corresponding to the ambient temperature and the state of charge at the same time obtained from the charging current map is 5A, and the power supply current of the charging device is 4A, then the charging current of the battery pack is 4A. The embodiments of the present application can quickly determine the charging current of the battery pack from the charging current map 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 heat generation 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 at the beginning of charging. Wherein, a plurality of battery monomers can be built-in in the battery pack, the battery temperature of the battery pack at the beginning of charging can include the temperature of each battery monomer, the temperatures of different battery monomers are different, and the battery temperature of the battery pack at the beginning of charging can be collected by the temperature sensor in the battery management system. The battery temperature of the battery pack at the beginning of charging can include the maximum temperature and the minimum temperature, the maximum temperature is the maximum value of the temperatures of the plurality of battery monomers, and the minimum temperature is the minimum value of the temperatures of the plurality of battery monomers. The average temperature of the battery pack can be determined according to the average value of the temperatures of the plurality of battery monomers, for example, the battery pack includes 8 battery monomers, the battery temperatures of the 8 battery monomers at the beginning of charging can be collected, the average value of the battery temperatures of the 8 battery monomers can be calculated, and the average temperature of the battery pack can be obtained. The embodiments of the present application combine the charging current, the battery internal resistance of the battery pack, the ambient temperature and the battery temperature of the battery pack at the beginning of charging, and since the influence of temperature on the heat generation power is considered, the accuracy of the heat generation power can be improved.

[0041] In an example, the determination process of the heat generation power of the battery pack includes: if 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, the heat generation power of the battery pack is calculated based on the charging current and the battery internal resistance. Wherein, the preset multiple can be set according to actual needs, and in general, the preset multiple can be set to 2, which is not limited by the present application. Exemplarily, if the preset multiple is 2, the maximum temperature is represented as T max, the minimum temperature is represented as T min, the ambient temperature is represented as T amb, and T max + T min ≥ 2T amb or T avg ≥ 2T amb, the formula of the heat generation power of the battery pack can be represented as: ​​​​​​​The battery internal resistance of the battery pack can be represented. 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, the embodiments of the present application can represent that the heat exchange between the battery pack and the environment is in a relatively balanced state, at this time, the influence of the heat transfer caused by the temperature difference on the temperature of the battery pack can be ignored, therefore, the heating power of the battery pack can be quickly determined through 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, 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 the preset time length. The preset time length can be set according to user demand, for example, the preset time length can be set to 10ms or 100ms. Exemplarily, if the preset multiple is 2, at , the formula of the heating power of the battery pack can be represented as:

[0042] , wherein, the heating power of the battery pack can be represented, the charging current of the battery pack can be represented, the battery internal resistance of the battery pack can be represented, the ambient temperature can be represented, the maximum temperature can be represented, the minimum temperature can be represented, the specific heat capacity of the battery pack can be represented, the battery mass of the battery pack can be represented, the preset time length can be represented. When 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 embodiments of the present application can represent that the heat exchange between the battery pack and the environment will occur, therefore, the heating power of the battery pack can be accurately determined by combining the ambient temperature, the battery temperature, the specific heat capacity of the battery pack and the battery mass. In at least one embodiment of the present application, the heat dissipation power of the battery pack can be determined according to the ambient temperature, the battery temperature of the battery pack at the beginning of charging and the preset power.

[0043] In an example, if the sum of the maximum temperature and the minimum temperature is greater than the preset multiple of the ambient temperature in which the battery pack is located, or the average temperature of the battery pack is greater than the 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 the preset time length. Exemplarily, if the preset multiple is 2, at , the calculation formula of the heat dissipation power of the battery pack can be represented as: , wherein, may represent a heat dissipation power of the battery pack, may represent an ambient temperature, may represent a maximum temperature, may represent a minimum temperature, may represent a specific heat capacity of the battery pack, may represent a battery mass of the battery pack, may represent a preset time length. When the sum of the maximum temperature and the minimum temperature is greater than a preset multiple of the ambient temperature at which the battery pack is located, or the average temperature of the battery pack is greater than a preset multiple of the ambient temperature, the present embodiment can represent that heat exchange will occur between the battery pack and the environment, and thus, by combining the ambient temperature, the battery temperature, the specific heat capacity of the battery pack, and the battery mass, the heat dissipation power of the battery pack can be accurately determined.

[0044] 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 a preset power. The preset power can be set according to actual needs, for example, the preset power can be set to 0. 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, the present embodiment can represent that the heat exchange between the battery pack and the environment is in a relative balance state, at which time the influence of heat transfer caused by temperature difference on the temperature of the battery pack can be ignored, and thus, by determining the preset power as the heat dissipation power, the determination efficiency of the heat dissipation power can be improved.

[0045] 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. 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, the battery cooling power of the battery pack is calculated. 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 an example, when the cooling system cools the battery pack, the battery cooling power can be determined by the product of 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 present embodiment can accurately determine the battery cooling power of the battery pack when the cooling system cools the battery pack by the thermal conductivity of the battery pack, the system cooling power of the cooling system, and the thermal conductivity of the cooling system; in addition, when the cooling system does not start the cooling function, it indicates that the cooling system is not running, and thus, by determining the battery cooling power as 0, the accuracy of the battery cooling power is improved.

[0046] In at least one embodiment of the present application, the thermal management system further comprises a heating system, which can be used to heat the battery pack. A battery heating power of the battery pack is calculated based on a thermal conductivity of the battery pack, a system heating power of the heating system and a thermal conductivity of the heating system. The system heating power can be determined based on a heating capacity of the heating system, and the thermal conductivity of the heating system can be determined based on a material of the heating system. In an example, when the heating system heats the battery pack, the battery heating power can be determined by the product of 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. Embodiments of the present application can accurately determine the battery heating power of the battery pack when the heating system heats the battery pack by 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.

[0047] In at least one embodiment of the present application, the plurality of power parameters can include but are not limited to the heat generation power, the heat dissipation power, the battery cooling power and the battery heating power of the battery pack.

[0048] In at least one embodiment of the present application, based on the plurality of power parameters of the battery pack during the charging process, the predicted temperature of the battery pack during the charging process is determined, comprising: calculating the predicted temperature of the battery pack at a second time based on the predicted temperature of the battery pack at a first time, the heat generation power, the heat dissipation power, the battery cooling power, the battery heating power of the battery pack, a preset time length, the specific heat capacity of the battery pack and the battery pack mass of the battery pack, the first time being earlier than the second time. The calculation formula of the predicted temperature of the battery pack during the charging process can be represented as: , The predicted temperature of the battery pack at the first time can be represented as: The predicted temperature of the battery pack at the second time can be represented as: The predicted temperature of the battery pack at the first time can be represented as: The predicted temperature of the battery pack at the second time can be represented as: , The battery temperature of the battery pack at the beginning of charging, The heat generation power of the battery pack can be represented as: The heat dissipation power of the battery pack can be represented as: The battery heating power of the battery pack can be represented as: The battery cooling power of the battery pack can be represented as: The specific heat capacity of the battery pack can be represented as: The battery mass of the battery pack can be represented as: The preset time length can be represented. The embodiments of the application can consider the influence of multiple factors on the predicted temperature of the battery pack in combination with multiple power parameters of the battery pack in the charging process, thereby improving the accuracy of the predicted temperature.

[0049] In S202, if the maximum predicted temperature is greater than the upper limit value of the temperature of the battery pack or the minimum predicted temperature is less than the lower limit value of the temperature of the battery pack, the preset thermal management parameter is adjusted.

[0050] In at least one embodiment of the application, the maximum predicted temperature and the minimum predicted temperature are determined according to the predicted temperature of the battery pack at multiple times in the charging process. The upper limit value of the temperature of the battery pack represents the maximum temperature that the battery pack can withstand and still maintain a relatively stable charging speed in the charging process. If the predicted temperature of the battery pack in the charging process is greater than the upper limit value of the temperature, the charging speed of the battery pack will be limited. The lower limit value of the temperature of the battery pack represents the minimum temperature that the battery pack can withstand and still maintain a relatively stable charging speed in the charging process. If the predicted temperature of the battery pack in the charging process is less than the lower limit value of the temperature, the charging speed of the battery pack will be limited.

[0051] In at least one embodiment of the application, the preset thermal management parameter can be set in advance according to actual needs. The preset thermal management parameter can 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.

[0052] In at least one embodiment of the application, adjusting the preset thermal management parameter includes: if the maximum predicted temperature is greater than the upper limit value of the temperature of the battery pack, reducing the first temperature threshold in the thermal management parameter; and if the minimum predicted temperature is less than the lower limit value of the temperature of the battery pack, increasing the second temperature threshold in the thermal management parameter.

[0053] In an example, the thermal management parameter can be adjusted according to a preset step length. The preset step length can be set and adjusted according to actual needs. For example, the preset step length can be set to 1℃.

[0054] The embodiment of the present application can reduce the standard of enabling the cooling function by reducing the first temperature threshold when the highest predicted temperature is greater than the upper limit of the temperature of the battery pack, further avoiding the highest predicted temperature of the battery pack during the charging process being greater than the upper limit of the temperature of the battery pack; the embodiment of the present application can reduce the standard of enabling the heating function by increasing the second temperature threshold when the lowest predicted temperature is less than the lower limit of the temperature of the battery pack, further avoiding the lowest predicted temperature of the battery pack during the charging process being less than the lower limit of the temperature 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 limit of the temperature to the upper limit of the temperature, thereby ensuring the charging speed of the battery pack. In addition, the embodiment of the present application can reasonably adjust the thermal management parameters by the lower limit of the temperature and the upper limit of the temperature, avoiding the adjusted thermal management parameters being unreasonable to cause excessive heating or excessive cooling of the battery pack, thereby avoiding energy waste.

[0055] S203, performing thermal management on the battery pack according to the adjusted thermal management parameters.

[0056] In at least one embodiment of the present application, the thermal management on the battery pack according to the adjusted thermal management parameters comprises: cooling the battery pack if the highest predicted temperature is greater than the first temperature threshold in the adjusted thermal management parameters; heating the battery pack if the lowest predicted temperature is less than the second temperature threshold in the adjusted thermal management parameters.

[0057] In an example, if the maximum predicted temperature is greater than the first temperature threshold in the adjusted thermal management parameter, the battery management system sends a cooling request to the thermal management system, and the thermal management system cools the battery pack by controlling the thermal management components such as the electric compressor (ECP) or the positive temperature coefficient (PTC) or the water pump. In the embodiment of the present application, when the maximum predicted temperature is greater than the first temperature threshold in the adjusted thermal management parameter, the battery pack is cooled, so that the battery temperature can be maintained in the temperature range from the lower temperature limit value to the upper temperature limit value, thereby improving the charging and discharging efficiency of the battery pack. In addition, by controlling the battery temperature in the temperature range from the lower temperature limit value to the upper temperature limit value, the aging process of the battery pack can be slowed down, the number of charging and discharging of the battery pack can be increased, and the overall service life of the battery pack can be prolonged. In another example, if the minimum predicted temperature is less than the second temperature threshold in the adjusted thermal management parameter, the battery management system sends a heating request to the thermal management system, and the thermal management system heats the battery pack by controlling the thermal management components such as the electric compressor (ECP) or the positive temperature coefficient (PTC) or the water pump. In the embodiment of the present application, when the minimum predicted temperature is less than the second temperature threshold in the adjusted thermal management parameter, the battery pack is heated, which can improve the activity inside the battery pack, so that the battery pack can normally charge and discharge in a low temperature environment, and the performance of the battery pack in a low temperature condition can be improved. In addition, by heating the battery pack, the polarization degree can be reduced, the charging efficiency of the battery pack can be improved, the charging time can be shortened, and the battery pack can also be quickly and efficiently charged in a low temperature environment.

[0058] In at least one embodiment of the present application, after the battery pack is thermally managed according to the adjusted thermal management parameter, step S201 can be performed, so that the predicted temperature of the battery pack in the charging process is in the temperature range from the lower temperature limit value to the upper temperature limit value, thereby ensuring the charging speed of the battery pack.

[0059] In the embodiments of the present application, by combining the plurality of power parameters of the battery pack in the charging process, the predicted temperature of the battery pack in the charging process can be accurately determined. When the maximum predicted temperature is greater than the upper temperature limit value of the battery pack or the minimum predicted temperature is less than the lower temperature limit value of the battery pack, the thermal management parameter is dynamically adjusted, so that the battery pack can be maintained in the temperature range from the lower temperature limit value to the upper temperature limit value in the charging process, thereby reducing the temperature fluctuation of the battery and ensuring the charging speed of the battery pack. In addition, by adjusting the thermal management parameter, the energy waste caused by excessive cooling or excessive heating of the battery pack can be avoided.

[0060] As Figure 4 shown is a flowchart of a battery management method provided by another embodiment of the present application. The battery management method is applied in a vehicle, for example, the vehicle 100 of Figure 1 . The order of steps in the flowchart can be changed according to different requirements, and some steps can be omitted.

[0061] S401, in the case that the battery pack does not have a charging fault and is not in a full charging state, based on a plurality of power parameters of the battery pack in a charging process, a predicted temperature of the battery pack in the charging process is determined, the predicted temperature including a highest predicted temperature and a lowest predicted temperature.

[0062] In at least one embodiment of the present application, if the battery management system and / or the battery pack have a fault, it is determined that the battery pack has a charging fault. If the battery management system and the battery pack do not have a fault, it is determined that the battery pack does not have a charging fault.

[0063] 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 full charging state. If the state of charge of the battery pack is not 100%, it is determined that the battery pack is not in a full charging state.

[0064] In at least one embodiment of the present application, the way of determining the predicted temperature of the battery pack in the charging process based on the plurality of power parameters of the battery pack in the charging process can refer to the detailed content of step S201, which will not be repeated here.

[0065] S402, it is determined whether the highest predicted temperature is greater than an upper limit value of the temperature of the battery pack, and whether the lowest predicted temperature is less than a lower limit value of the temperature of the battery pack.

[0066] In at least one embodiment of the present application, the upper limit value of the temperature of the battery pack represents the highest temperature that the battery pack can withstand and still maintain a relatively stable charging speed in the charging process, and the lower limit value of the temperature of the battery pack represents the lowest temperature that the battery pack can withstand and still maintain a relatively stable charging speed in the charging process.

[0067] In at least one embodiment of the present application, if the highest predicted temperature is less than or equal to the upper limit value of the temperature of the battery pack, and the lowest predicted temperature is greater than or equal to the lower limit value of the temperature of the battery pack, step S403 is executed; if the highest predicted temperature is greater than the upper limit value of the temperature of the battery pack, or the lowest predicted temperature is less than the lower limit value of the temperature of the battery pack, step S404 is executed.

[0068] S403, the charging of the battery pack is continued.

[0069] In at least one embodiment of the present application, if the maximum predicted temperature is less than or equal to the upper temperature limit of the battery pack and the minimum predicted temperature is greater than or equal to the lower temperature limit of the battery pack, it can be indicated 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, and thus the charging speed of the battery pack can be ensured.

[0070] S404, adjusting the preset thermal management parameter.

[0071] S405, performing thermal management on the battery pack according to the adjusted thermal management parameter.

[0072] In at least one embodiment of the present application, after performing thermal management on the battery pack according to the adjusted thermal management parameter, step S401 is performed.

[0073] The details of steps S404-S405 can refer to the detailed description of steps S202-S203 in the foregoing Figure 2 , which will not be described here again.

[0074] In the embodiments of the present application, in the case that the battery pack does not have a charging fault and is not in a full charging state, the predicted temperature of the battery pack during the charging process is determined, which can ensure that the predicted temperature is determined under the charging condition, and improve the effectiveness of the determination of the predicted temperature. Meanwhile, by comprehensively considering the 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 maximum predicted temperature is greater than the upper temperature limit of the battery pack or the minimum predicted temperature is less than the lower temperature limit of the battery pack, the thermal management parameter is dynamically adjusted, so that the temperature of the battery pack during the charging process can be kept 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 performing thermal management on the battery pack according to the adjusted thermal management parameter, energy waste caused by excessive cooling or excessive heating of the battery pack can be avoided.

[0075] As Figure 5 shown in FIG. 5 is a functional module diagram of a battery management device provided by an embodiment of the present application. The battery management device 51 runs 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 series of computer program segments that can be acquired by a processor (for example, the processor 61 shown in FIG. 6) and can complete a fixed function, which are stored in a memory (for example, the memory 62 shown in FIG. 6). Figure 6 Figure 6

[0076] ​​The determining unit 510 is configured to determine 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, the predicted temperature including a maximum predicted temperature and a minimum predicted temperature; the adjusting unit 511 is configured to adjust a preset thermal management parameter if the maximum predicted temperature is greater than an upper limit value of the temperature of the battery pack or the minimum predicted temperature is less than a lower limit value of the temperature of the battery pack; and the control unit 512 is configured to perform thermal management on the battery pack according to the adjusted thermal management parameter.

[0077] In an embodiment, the determining unit 510 is further configured to determine a charging current of the battery pack according to an ambient temperature in which the battery pack is located and a state of charge of the battery pack; and the determining unit 510 is further configured to determine a heat generation power of the battery pack according to the charging current, a battery internal resistance of the battery pack, the ambient temperature, and a battery temperature of the battery pack at the beginning of the charging.

[0078] In an embodiment, the battery temperature includes a maximum temperature and a minimum temperature, and the determining unit 510 is specifically configured to: if a sum of the maximum temperature and the minimum temperature is greater than or equal to a preset multiple of the ambient temperature or an average temperature of the battery pack is greater than or equal to a preset multiple of the ambient temperature, calculate the heat generation power based on the charging current and the battery internal resistance, the average temperature being determined based on the battery temperature; and 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 heat generation power based on the charging current, the battery internal resistance, the battery temperature, the ambient temperature, a specific heat capacity of the battery pack, a battery mass of the battery pack, and a preset time length.

[0079] In an embodiment, the battery temperature of the battery pack at the beginning of the charging includes a maximum temperature and a minimum temperature, and the calculating unit 513 is configured to: if a sum of the maximum temperature and the minimum temperature is greater than a preset multiple of an ambient temperature in which the battery pack is located or an average temperature of the battery pack is greater than a preset multiple of the ambient temperature, calculate a heat dissipation power of the battery pack based on the battery temperature, the ambient temperature, a specific heat capacity of the battery pack, a battery mass of the battery pack, and a preset time length, the average temperature being determined based on the battery temperature; and the determining unit 510 is further configured to: 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, determine the heat dissipation power as a preset power.

[0080] In an embodiment, the calculating unit 513 is further configured to calculate 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 calculating unit 513 is further configured to calculate a battery heating power of the battery pack based on the thermal conductivity of the battery pack, a system heating power of a heating system in the thermal management system, and a thermal conductivity of the heating system.

[0081] In an embodiment, the determining unit 510 is specifically configured to: calculate the predicted temperature of the battery pack at the second time based on the predicted temperature of the battery pack at the first time, the heat generation power of the battery pack, the heat dissipation power, the battery cooling power, the battery heating power, the preset time length, the specific heat capacity of the battery pack, and the battery pack mass, the first time being earlier than the second time.

[0082] In an embodiment, the adjusting unit 511 is specifically configured to: decrease the first temperature threshold in the thermal management parameter if the highest predicted temperature is greater than the upper limit value of the temperature of the battery pack; and increase the second temperature threshold in the thermal management parameter if the lowest predicted temperature is less than the lower limit value of the temperature of the battery pack.

[0083] In an embodiment, the control unit 512 is specifically configured to: cool the battery pack if the highest predicted temperature is greater than the first temperature threshold in the adjusted thermal management parameter; and heat the battery pack if the lowest predicted temperature is less than the second temperature threshold in the adjusted thermal management parameter.

[0084] In the embodiments of the present application, the predicted temperature of the battery pack during the charging process can be accurately determined by combining the plurality of power parameters of the battery pack during the charging process. When the highest predicted temperature is greater than the upper limit value of the temperature of the battery pack or the lowest predicted temperature is less than the lower limit value of the temperature of the battery pack, the thermal management parameter is dynamically adjusted, so that the battery pack can be kept in the temperature range from the lower limit value of the temperature to the upper limit value of the temperature during the charging process, thereby reducing the temperature fluctuation of the battery and ensuring the charging speed of the battery pack. In addition, the battery pack can be thermally managed by the adjusted thermal management parameter, so as to avoid energy waste caused by excessive cooling or excessive heating of the battery pack.

[0085] As shown in FIG. 1, it is a structural schematic diagram of a vehicle of a preferred embodiment of the battery management method of the present application. Figure 6

[0086] In an embodiment of the present application, the vehicle 100 includes, but is not limited to, a memory 62, a processor 61, and a computer program, such as a battery management program, stored in the memory 62 and executable on the processor 61.

[0087] Those skilled in the art can understand that the schematic diagram is only an example of the vehicle 100 and does not constitute a limitation on the vehicle 100, and can include more or fewer components than the diagram, or combine certain components, or different components, for example, the vehicle 100 can also include an input / output device, a network access device, a bus, etc.

[0088] ​The processor 61 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The processor 61 is the operation core and control center of the vehicle 100, and is connected with various parts of the vehicle 100 through various interfaces and lines, and obtains the operation system of the vehicle 100 and various installed application programs, program codes, etc.

[0089] The processor 61 obtains the operation system of the vehicle 100 and various installed application programs. The processor 61 obtains the application programs to implement the steps in each of the above battery management method embodiments, such as the steps shown in FIG. 6. Figure 2 、 Figure 4

[0090] For example, the computer program can be divided into one or more modules / units, and the one or more modules / units are stored in the memory 62 and obtained by the processor 61 to complete the present application. The one or more modules / units can be a series of computer program instruction segments capable of completing a specific function, and the instruction segments are used to describe the obtaining process of the computer program in the vehicle 100.

[0091] The memory 62 can be used to store computer programs and / or modules. The processor 61 realizes various functions of the vehicle 100 by running or obtaining 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. The program storage area can store an operation system, at least one application program required by a function (such as a sound playing function, an image playing 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 media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device.

[0092] ​The memory 62 can be an external memory and / or an internal memory of the vehicle 100. Further, the memory 62 can be a memory having a physical form, such as a memory stick, a TF card, and the like.

[0093] The modules / units integrated in the vehicle 100, if implemented in the form of software function units and sold or used as independent workpieces, can be stored in a computer-readable storage medium. Based on such understanding, all or part of the processes in the above-described embodiments can also be implemented by a computer program instructing related hardware, and the computer program can be stored in a computer-readable storage medium and executed by a processor to implement the steps of each method embodiment.

[0094] The computer program includes computer program code, which can be in the form of source code, object code, executable files, or some intermediate forms. The computer-readable medium can include any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM).

[0095] The memory 62 can be used to store computer programs and / or modules, and the processor 61 realizes various functions of the vehicle 100 by running or executing the 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, at least one application program required by a function (such as a sound playing function, an image playing function, etc.), and the like; the data storage area can store data created during use of the vehicle, etc. The memory 62 can include non-volatile and volatile memories, for example, a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash storage device, or other storage devices.

[0096] For example, the computer program can 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 can be a series of computer program segments capable of completing a specific function, which are used to describe the execution process of the computer program in the vehicle 100. For example, the computer program can be divided into a determination unit 510, an adjustment unit 511, a control unit 512 and a calculation unit 513.

[0097] The detailed content of the functions of the modules / units can refer to the detailed description of the above Figure 2 、 Figure 4 , which will not be described here.

[0098] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and there can be another division way in actual implementation.

[0099] The modules described as separate components can or can not be physically separated, and the components shown as modules can or can not be physical units, that is, they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs.

[0100] In addition, each functional module in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or hardware plus software function module.

[0101] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any additional reference signs in the claims should not be regarded as limiting the claims involved.

[0102] In addition, it is obvious 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 mean any specific order.

[0103] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A battery management method, characterized in that, The method includes: 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. The multiple power parameters include: the heat generation power, heat dissipation power, battery cooling power, and battery heating power of the battery pack. The predicted temperature includes the highest predicted temperature and the lowest predicted temperature. If the highest predicted temperature is greater than the upper limit of the battery pack temperature, or the lowest predicted temperature is less than the lower limit of the battery pack temperature, the preset thermal management parameters are adjusted, including: if the highest predicted temperature is greater than the upper limit of the battery pack temperature, a first temperature threshold in the thermal management parameters is decreased; if the lowest predicted temperature is less than the lower limit of the battery pack temperature, a second temperature threshold in the thermal management parameters is increased. The first temperature threshold is used to control cooling of the battery pack, and the second temperature threshold is used to control heating of the battery pack. Thermal management of the battery pack is performed according to the adjusted thermal management parameters.

2. The battery management method according to claim 1, characterized in that, The method further includes: The charging current of the battery pack is determined based on the ambient temperature of the battery pack and the state of charge of the battery pack. The heat generation power of the battery pack is determined based on the charging current, the internal resistance of the battery pack, the ambient temperature, and the battery temperature of the battery pack at the start of charging.

3. The battery management method according to claim 2, characterized in that, The battery temperature includes a maximum temperature and a minimum temperature. Determining the heat dissipation power of the battery pack based on the charging current, the battery internal resistance, the ambient temperature, and the battery temperature at the start of charging 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 if the average temperature of the battery pack is greater than or equal to a preset multiple of the ambient temperature, the heat generation 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 a preset multiple of the ambient temperature, or if the average temperature is less than a preset multiple of the ambient temperature, the heat generation 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 the 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 if 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 if 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.

5. The battery management method according to claim 1, characterized in that, The method further includes: 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, calculate the battery cooling power of the battery pack; 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 method of determining the predicted temperature of the battery pack during charging based on multiple power parameters of the battery pack 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 battery pack mass, the predicted temperature of the battery pack at the second moment is calculated, where the first moment is earlier than the second moment.

7. The battery management method according to claim 1, characterized in that, The step of performing thermal management on the battery pack according to the adjusted thermal management parameters includes: 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.

8. A vehicle, characterized in that, include: A memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the battery management method as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-readable instructions that, when executed by a processor, implement the battery management method as described in any one of claims 1 to 7.

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