Battery management method, device and equipment and computer readable storage medium

Abstract

The embodiment of the invention provides a battery management method, device and equipment and a computer readable storage medium. The method comprises the following steps: determining the electric quantity of a battery to be tested and the temperature of a test environment; calculating the electric quantity and the temperature through a preset health degree determination model, and determining the health degree of the to-be-detected battery; the preset health degree determination model represents the influence degree of the battery electric quantity and the temperature on the health degree of the battery. In the scheme, the electric quantity of the battery and the temperature of the test environment can influence the health degree of the battery, and after the electric quantity of the to-be-tested battery and the temperature of the test environment are determined, the health degree of the to-be-tested battery is determined according to the electric quantity of the to-be-tested battery and the temperature of the test environment through the preset health degree determination model. The preset health degree determination model represents the influence degree of the battery electric quantity and the temperature on the health degree of the battery, so that the preset health degree determination model is wider in application range and higher in precision, battery management is performed through the preset health degree determination model, and the battery management performance is improved.

Description

Technical Field

[0001] The present application relates to the field of battery management, and in particular to a battery management method, device, equipment and computer-readable storage medium. Background Art

[0002] As an important power source for consumer terminals, lithium-ion batteries have a very complex charging and discharging process, which has a great impact on terminal performance. Therefore, better battery management and control are needed to study the real-time status of the battery, such as power level, temperature, capacity, health, charging and discharging speed, power prediction, etc., so as to better use the battery system. Battery management systems are generally studied based on battery models, so the accuracy of battery models has a great impact on the performance of the management system. Limited by the storage space of the battery management system memory and the computing speed of the processor, a more accurate battery model is a prerequisite for the effective operation of the battery management system.

[0003] Since the remote control model is relatively simple and has low accuracy when the order is low, its accuracy gradually increases with the increase of the order of the remote control model, and its calculation amount also increases accordingly. Therefore, it is widely used in battery management systems.

[0004] The existing battery model is used within a fixed temperature value or range, or within a power range, which can easily lead to a small application range and low accuracy of the battery model, thereby reducing the battery management performance. Summary of the invention

[0005] The embodiments of the present application are intended to provide a battery management method, apparatus, device and computer-readable storage medium that can improve battery management performance.

[0006] The technical solution of this application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a battery management method, including: determining the power of a battery to be tested and the temperature of a test environment; calculating the power and the temperature through a preset health determination model to determine the health of the battery to be tested; the preset health determination model characterizes the degree of influence of the battery power and temperature on the health of the battery.

[0008] In a second aspect, an embodiment of the present application provides a battery management device, the battery management device comprising: a determination unit, wherein:

[0009] The determination unit is used to determine the power of the battery to be tested and the temperature of the test environment; through a preset health determination model, the power and the temperature are calculated to determine the health of the battery to be tested; the preset health determination model characterizes the influence of the battery power and temperature on the health of the battery.

[0010] In a third aspect, an embodiment of the present application provides a battery management device, the battery management device comprising: a processor and a memory; wherein:

[0011] The memory is used to store computer programs;

[0012] The processor is used to call and run the computer program from the memory to execute the method as described in the first aspect.

[0013] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing executable instructions for causing a processor to execute the method described in the first aspect.

[0014] The embodiments of the present application provide a battery management method, device, equipment and computer-readable storage medium, the method comprising: determining the power of the battery to be tested and the temperature of the test environment; calculating the power and the temperature through a preset health determination model to determine the health of the battery to be tested; the preset health determination model characterizes the influence of the battery power and temperature on the health of the battery. In the above scheme, since the power of the battery and the temperature of the test environment will affect the health of the battery, after determining the power of the battery to be tested and the temperature of the test environment, the health of the battery to be tested is determined according to the power of the battery to be tested and the temperature of the test environment through a preset health determination model, so that the health of the battery to be tested determined by the preset health determination model is more accurate; at the same time, since the preset health determination model characterizes the influence of the battery power and temperature on the health of the battery, the preset health determination model has a wider scope of application and higher accuracy, and battery management is performed through the preset health determination model, thereby improving battery management performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solution of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0017] Figure 1 An optional process diagram of a battery management method is provided for an embodiment of the present application Figure 1 ;

[0018] Figure 2 An optional process diagram of a battery management method is provided for an embodiment of the present application Figure 2 ;

[0019] Figure 3 An optional process diagram of a battery management method is provided for an embodiment of the present application Figure 3 ;

[0020] Figure 4 An optional process diagram of a battery management method is provided for an embodiment of the present application Figure 4 ;

[0021] Figure 5 An optional process diagram of a battery management method is provided for an embodiment of the present application Figure 5 ;

[0022] Figure 6 An optional current schematic diagram of a battery management method is provided for an embodiment of the present application;

[0023] Figure 7 An optional voltage schematic diagram of a battery management method is provided for an embodiment of the present application;

[0024] Figure 8 A schematic diagram of a corresponding relationship between an optional preset health level and impedance of a battery management method is provided for an embodiment of the present application;

[0025] Fig. 9 A schematic diagram of the structure of a battery management device is provided for an embodiment of the present application;

[0026] Fig.10 A structural schematic diagram of a battery management device is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0029] In the following description, reference is made to “some embodiments”, “this embodiment”, “embodiments of the present application” and examples, etc., which describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0030] If similar descriptions of "first / second" appear in the application documents, the following instructions are added. In the following description, the terms "first\second\third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0031] The present application provides a battery management method. Figure 1 This is an optional process diagram of a battery management method provided in an embodiment of the present application. Figure 1 , will combine Figure 1 The steps shown are explained.

[0032] S101, determining the power level of the battery to be tested and the temperature of the test environment.

[0033] In the embodiment of the present application, the battery may age during daily use, which may result in reduced battery performance. The degree of battery aging can be measured by testing the battery health. Usually, the battery health is tested by measuring the battery target specific physical quantity, which refers to the target value during actual use.

[0034] In some embodiments of the present application, the physical quantity of the battery includes the remaining capacity of the battery, the thickness of the battery, the temperature of the battery, and the power of the battery. The power of the battery and the temperature of the battery test environment are different, and the impedance of the battery is also different, which affects the health of the battery.

[0035] In some embodiments of the present application, the battery management method is applicable to scenarios in which the health of the battery is managed.

[0036] In some embodiments of the present application, when the battery management device tests the health of a battery to be tested, the power of the battery to be tested and the temperature of the test environment are obtained because the power of the battery to be tested and the temperature of the test environment will affect the test results.

[0037] It should be noted that the power level of the battery to be tested is expressed as a percentage.

[0038] Exemplarily, the capacity calculation method of the battery is preferably a rated capacity measurement method of the battery, such as the capacity discharged at 0.2C at 25°C, or the capacity measurement at other rates, such as 1C, 0.5C, 2C, etc.

[0039] It should be noted that the battery management device can be a terminal.

[0040] S102. Calculate the power and temperature through a preset health determination model to determine the health of the battery to be tested; the preset health determination model characterizes the influence of the battery power and temperature on the battery health.

[0041] In an embodiment of the present application, a preset health determination model characterizes the degree of influence of battery charge and temperature on the health of the battery; the preset health determination model includes: a preset impedance fitting relationship and a corresponding relationship between a preset health and impedance.

[0042] In some embodiments of the present application, the preset health determination model is the relationship between temperature, power, impedance and health obtained by fitting multiple test data.

[0043] In some embodiments of the present application, the battery management device can calculate the power and temperature through a preset impedance fitting relationship to determine the impedance of the battery to be tested; and calculate the impedance of the battery to be tested through a preset correspondence between health and impedance to determine the health of the battery to be tested.

[0044] In some embodiments of the present application, the battery management device can calculate the impedance of the battery to be tested based on the charge when the temperature of the test environment is determined by using a preset impedance fitting relationship; or, when the charge of the battery to be tested is determined, the impedance of the battery to be tested can be calculated based on the temperature of the test environment.

[0045] In some embodiments of the present application, after the impedance of the battery to be tested is determined, the impedance of the battery to be tested can be brought into a corresponding relationship between a preset health degree and impedance to calculate the health degree of the battery to be tested.

[0046] It can be understood that the battery management device determines the power of the battery to be tested and the temperature of the test environment; through the preset health determination model, the power and temperature are calculated to determine the health of the battery to be tested; the preset health determination model characterizes the degree of influence of the battery power and temperature on the health of the battery. Since the power of the battery and the temperature of the test environment will affect the health of the battery, after determining the power of the battery to be tested and the temperature of the test environment, the preset health determination model is used to determine the health of the battery to be tested according to the power of the battery to be tested and the temperature of the test environment, so that the health of the battery to be tested determined by the preset health determination model is more accurate; at the same time, since the preset health determination model characterizes the degree of influence of the battery power and temperature on the health of the battery, the preset health determination model has a wider scope of application and higher accuracy, and battery management is performed through the preset health determination model, thereby improving battery management performance.

[0047] In the embodiment of the present application, Figure 2 An optional process diagram of a battery management method is provided for an embodiment of the present application Figure 2 ,like Figure 2 As shown, S102 can be implemented by S1021 and S1022 as follows:

[0048] S1021. Calculate the charge and temperature by using a preset impedance fitting relationship to determine the impedance of the battery to be tested; the preset impedance fitting relationship represents the relationship between the impedance, charge and temperature.

[0049] In the embodiment of the present application, the preset impedance fitting relationship includes: a preset temperature impedance fitting relationship and a preset charge impedance fitting relationship.

[0050] In some embodiments of the present application, the preset temperature-impedance fitting relationship is to change the temperature under a certain power level, record the impedance after the temperature change, and obtain the law of impedance change caused by temperature change by fitting the temperature and impedance. Under different power levels, the preset temperature-impedance fitting relationship determined is also different.

[0051] In some embodiments of the present application, the preset charge-impedance fitting relationship is to change the temperature under a certain temperature, record the impedance after the battery charge is changed, and fit the charge and impedance to obtain the law of impedance change caused by charge change. At different temperatures, the preset charge-impedance fitting relationship is also different.

[0052] In some embodiments of the present application, under the power level, the standard temperature and the first impedance corresponding to the preset temperature-impedance fitting relationship are determined; based on the standard temperature, the first impedance, the preset temperature-impedance fitting relationship and the temperature, calculations are performed to determine the impedance of the battery to be tested.

[0053] In some embodiments of the present application, when determining a preset temperature-impedance fitting relationship, the impedance at a certain temperature is calculated, the certain temperature is used as the standard temperature, and the impedance at the certain temperature is used as the first impedance.

[0054] It should be noted that health = battery current capacity / battery initial capacity.

[0055] It can be understood that when the battery management device is under power, it determines the standard temperature and the first impedance corresponding to the preset temperature-impedance fitting relationship; and performs calculations based on the standard temperature, the first impedance, the preset temperature-impedance fitting relationship and the temperature to determine the impedance of the battery to be tested; since the preset temperature-impedance fitting relationship is the law of impedance change caused by temperature change obtained by fitting temperature and impedance, the impedance of the battery to be tested is determined by the preset temperature-impedance fitting relationship, which can improve the accuracy of determining the impedance of the battery to be tested.

[0056] In some embodiments of the present application, at a temperature, a standard charge and a second impedance corresponding to a preset charge-impedance fitting relationship are determined; and calculations are performed based on the standard charge, the second impedance, the preset charge-impedance fitting relationship, and the charge to determine the impedance of the battery to be tested.

[0057] In some embodiments of the present application, when determining the preset electrical quantity measurement impedance fitting relationship, the impedance at a certain electrical quantity is calculated, the certain electrical quantity is used as the standard electrical quantity, and the impedance at a certain electrical quantity is used as the second impedance.

[0058] It can be understood that the battery management device determines the standard power and the second impedance corresponding to the preset power-impedance fitting relationship at temperature; performs calculations based on the standard power, the second impedance, the preset power-impedance fitting relationship and the power to determine the impedance of the battery to be tested; since the preset power-impedance fitting relationship is the law of impedance change caused by power change obtained by fitting power and impedance, the impedance of the battery to be tested is determined by the preset power-impedance fitting relationship, which can improve the accuracy of determining the impedance of the battery to be tested.

[0059] In some embodiments of the present application, the battery management device can determine the temperature difference based on the standard temperature and temperature; perform calculations based on the preset temperature-impedance fitting relationship and the temperature difference to determine the impedance change value; and perform calculations based on the first impedance and the impedance change value to determine the impedance of the battery to be tested.

[0060] Exemplarily, the preset temperature-impedance fitting relationship is: y=2.0246x+132.87, wherein x is temperature and y is impedance, and the preset temperature-impedance fitting relationship, i.e., the relationship between temperature and impedance, is that for every degree increase in temperature, the impedance value decreases by 2.0246 mΩ; in the use of the whole machine, at 50% SOC (i.e., the power is 50%), the impedance value at 36°C (i.e., standard temperature) is 65 mΩ (i.e., the first impedance), then the impedance at 25°C (i.e., temperature) is 65+11*2.0246=87.2706 mΩ, that is, the impedance of the battery to be tested is 87.2706 mΩ.

[0061] S1022. Calculate the impedance of the battery to be tested by presetting a corresponding relationship between the health and the impedance to determine the health of the battery to be tested; the preset corresponding relationship between the health and the impedance represents a law of change of the battery health with the change of the impedance.

[0062] In the embodiment of the present application, the corresponding relationship between the preset health and impedance represents the changing pattern of the battery health as the impedance changes.

[0063] In some embodiments of the present application, the battery management device may bring the impedance of the battery to be tested into the corresponding relationship between the preset health and impedance for calculation to obtain the health of the battery to be tested.

[0064] Exemplarily, the corresponding relationship between the preset health and impedance is: m=-0.0024n+1.1478; wherein n is the impedance value and m is the health. When the impedance is 87.2706mΩ, the health of the battery to be tested is m=-0.0024*87.2706+1.1478=0.938, that is, the health of the battery to be tested is 93.8%.

[0065] It can be understood that the battery management device calculates the charge and temperature through a preset impedance fitting relationship to determine the impedance of the battery to be tested; calculates the impedance of the battery to be tested through a preset correspondence between health and impedance to determine the health of the battery to be tested; since the preset impedance fitting relationship represents the relationship between impedance, charge and temperature, the impedance of the battery to be tested is determined through the preset impedance fitting relationship, which can improve the accuracy of determining the impedance of the battery to be tested; at the same time, since the preset correspondence between health and impedance represents the correspondence between impedance and battery health, the health of the battery to be tested is determined through the preset correspondence between health and impedance, which makes it more accurate to determine the health of the battery to be tested.

[0066] In the present application embodiment, based on Figure 1 , Figure 3 An optional process diagram of an electric vehicle anti-shake method is provided for an embodiment of the present application Figure 3 ,like Figure 3As shown, S103-S106 are also executed before S102, as follows:

[0067] S103, performing aging processing on at least one battery to obtain batteries in different aging states; and determining the health status corresponding to the batteries in different aging states.

[0068] In an embodiment of the present application, the battery management device can perform aging processing on at least one battery to obtain batteries in different aging states, and take out the batteries in different aging states and place them at a specific ambient temperature to test the health of the batteries in that state.

[0069] In some embodiments of the present application, the battery management device selects several batteries that are not newly produced, ages them according to a specific aging path, and then takes out the batteries in different aging states (i.e., different health states of the batteries) and places them at a specific ambient temperature to test the target specific physical quantity of the batteries in this state. The target specific physical quantity of the batteries is the health of the batteries.

[0070] It should be noted that the battery target specific physical quantity refers to the target value during actual use, such as the remaining capacity of the battery, the thickness of the battery, the temperature of the battery, and the battery power.

[0071] In some embodiments of the present application, the plurality of batteries that are not newly manufactured may be lithium-ion batteries, and the number of lithium-ion batteries is ≥ 2, and is generally selected to be 3.

[0072] It should be noted that the specific aging path can be conventional battery aging, such as 0.5C charging and then 0.5C discharging cycle testing at 25°C, or it can be an accelerated aging path, such as high temperature aging at 50°C high temperature cycle testing with 1C charging and 0.5C discharging. The battery aging path of this application is not limited.

[0073] It should be noted that the specific ambient temperature refers to the specific standard definition of the battery during actual use, such as the remaining capacity standard of 25°C, which is unified before and after; different aging states generally refer to different health levels of the battery, i.e. 100%, 95%, 90%, etc.

[0074] S104. Under the target temperature and target power, current disturbance signals are respectively superimposed on batteries in different aging states according to preset time periods to determine corresponding relationships between preset health and impedance of batteries in different aging states.

[0075] In an embodiment of the present application, the battery management device superimposes current disturbance signals on batteries in different aging states at a target temperature and a target power level, and continues for a preset time period to determine the corresponding relationship between the preset health and impedance of the batteries in different aging states.

[0076] In some embodiments of the present application, the battery management device superimposes current disturbance signals on batteries in different aging states according to preset time periods at a target temperature and a target power, and samples them at a preset acquisition frequency to obtain voltage signals and current signals; performs time-frequency conversion analysis on the voltage signal and the current signal to obtain the impedance corresponding to the characteristic frequency; and performs fitting based on the corresponding health of the batteries in different aging states and the impedance values ​​at a specific frequency to determine the corresponding relationship between the preset health and impedance of the batteries in different aging states.

[0077] In some embodiments of the present application, after time-frequency conversion analysis of voltage signals and current signals, the corresponding impedance Z = [Z1, Z2, Z3, ... Zn] at the characteristic frequency f = [f1, f2, f3, ... fn] can be obtained.

[0078] S105. At different preset temperatures or different preset capacities, current disturbance signals are respectively superimposed on batteries in different aging states according to preset time periods to determine a preset impedance fitting relationship.

[0079] In an embodiment of the present application, when the battery charge is determined, the battery management device superimposes current disturbance signals on batteries in different aging states at different preset temperatures and in preset time periods to determine a preset temperature-impedance fitting relationship; when the temperature of the battery test environment is determined, at different preset charges, current disturbance signals are superimposed on batteries in different aging states in preset time periods to determine a preset charge-impedance fitting relationship; the preset temperature-impedance fitting relationship and the preset charge-impedance fitting relationship are used as the preset impedance fitting relationship.

[0080] S106: Determine the corresponding relationship between the preset health degree and the impedance and the preset impedance fitting relationship as a preset health degree determination model.

[0081] In the embodiment of the present application, the battery management device determines the corresponding relationship between the preset health and impedance and the preset impedance fitting relationship as a preset health determination model.

[0082] It can be understood that the battery management device performs aging processing on at least one battery to obtain batteries in different aging states; and determines the corresponding health of the batteries in different aging states; at the target temperature and target power, the current disturbance signal is superimposed on the batteries in different aging states according to the preset time period to determine the corresponding relationship between the preset health and impedance of the batteries in different aging states; at different preset temperatures or different preset powers, the current disturbance signal is superimposed on the batteries in different aging states according to the preset time period to determine the preset impedance fitting relationship; the corresponding relationship between the preset health and impedance and the preset impedance fitting relationship are determined as a preset health determination model; because the preset health determination model characterizes the influence of battery power and temperature on the health of the battery, the preset health determination model has a wider range of application and higher accuracy, and battery management can be improved by performing battery management through the preset health determination model.

[0083] In the embodiment of the present application, Figure 4 An optional process diagram of a battery management method is provided for an embodiment of the present application Figure 4 ,like Figure 4 As shown, S104 can be implemented by S1041, S1042 and S1043 as follows:

[0084] S1041. Under the target temperature and target power, current disturbance signals are superimposed on batteries in different aging states according to preset time periods, and sampling is performed at a preset acquisition frequency to obtain voltage signals and current signals.

[0085] In an embodiment of the present application, the battery management device superimposes current disturbance signals on batteries in different aging states at a target temperature and a target power level, and continues for a preset period of time, and then samples at a preset acquisition frequency to obtain voltage signals and current signals.

[0086] In some embodiments of the present application, during the charging process, the batteries in different aging states are placed at a set temperature value, a specific SOC (i.e., battery charge), a specific current disturbance signal is superimposed, and the duration is t (i.e., a preset time period), and the voltage and current values ​​of the batteries are recorded at the same time.

[0087] It should be noted that the target temperature is the set temperature value, which is consistent with the test target physical quantity temperature in S103. The specific SOC is calculated by fixing a SOC value, that is, the SOC value is used in different aging states.

[0088] Exemplarily, the superimposed specific current disturbance signal includes a square wave signal and a sine signal. If it is a sine signal, it is preferably characterized by being generated by superposition of sine waves of multiple frequencies, and its mean value is 0; it can also be a square wave signal, and the current step size △I ≥ 500mA, that is, for example, using 1000mA to charge t / 2, and then using 500mA to charge t / 2. If the current signal is a square wave signal, the current does not need to be constant, and slight fluctuations in the current can be accepted, and the fluctuation value is less than or equal to 500mA, preferably less than or equal to 200mA, for example, when charging with 1000mA, it can be between 1100 and 900mA.

[0089] It should be noted that the duration t should be greater than or equal to twice the inverse of the frequency in the selected specific frequency impedance, that is, t≥2 / fn, preferably t≥10 / fn; the acquisition battery current frequency fs (that is, the preset acquisition frequency) under the current disturbance signal should be greater than or equal to twice the frequency in the selected specific frequency impedance, that is, fs≥2fn, and fs≥10fn is generally selected. The disturbance signal calculation is performed during the battery charging process, but it is also applicable to the calculation during the discharge process.

[0090] S1042. Perform time-frequency conversion analysis on the voltage signal and the current signal to obtain the impedance corresponding to the characteristic frequency.

[0091] In the embodiment of the present application, the battery management device performs time-frequency conversion analysis on the collected voltage signal and current signal to obtain the corresponding impedance at the characteristic frequency.

[0092] In some embodiments of the present application, the time-frequency conversion analysis method adopted by the battery management device includes a wavelet transform method or a windowed Fourier transform method.

[0093] It should be noted that the characteristic frequency is preferably 0.01 Hz to 60 Hz, and in particular, 0.1 to 5 Hz is generally selected.

[0094] S1043. Determine the corresponding relationship between the preset health and impedance of the battery under different aging conditions based on the corresponding health of the battery under different aging conditions and the impedance value under a specific frequency; the impedance value under a specific frequency is the impedance value under any frequency in the characteristic frequency.

[0095] In the embodiment of the present application, the impedance value at a specific frequency is the impedance value at any frequency among the characteristic frequencies.

[0096] In some embodiments of the present application, the battery management device fits the health status corresponding to the battery in different aging states and the impedance value at a specific frequency to obtain a fitting function, that is, the corresponding relationship between the preset health status and impedance of the battery in different aging states.

[0097] Exemplarily, the fitting function is m=f'(Zn); wherein Zn is the impedance value and m is the health level.

[0098] It can be understood that, under the target temperature and target power, the battery management device superimposes the current disturbance signal on the batteries in different aging states according to the preset time period, and samples at the preset acquisition frequency to obtain the voltage signal and the current signal; performs time-frequency conversion analysis on the voltage signal and the current signal to obtain the impedance corresponding to the characteristic frequency; performs fitting based on the corresponding health of the batteries in different aging states and the impedance value at a specific frequency to determine the corresponding relationship between the preset health and impedance of the batteries in different aging states; facilitates the subsequent determination of the health of the battery to be tested according to the corresponding relationship between the preset health and impedance of the batteries in different aging states; at the same time, since the corresponding relationship between the preset health and impedance of the batteries in different aging states fully considers the influence of power and temperature on the health of the batteries, the accuracy of the corresponding relationship between the preset health and impedance is improved.

[0099] In the embodiment of the present application, Figure 5 An optional process diagram of a battery management method is provided for an embodiment of the present application Figure 5 ,like Figure 5 As shown, S105 can be implemented by S1051, S1052 and S1053 as follows:

[0100] S1051. When the battery power is determined, current disturbance signals are superimposed on batteries in different aging states at different preset temperatures and in preset time periods to determine a preset temperature-impedance fitting relationship.

[0101] In an embodiment of the present application, after obtaining the corresponding relationship between the preset health and impedance of the battery in different aging states, the battery management device adjusts the temperature when the battery power is determined, and superimposes the current disturbance signal on the batteries in different aging states at different preset temperatures to determine the preset temperature-impedance fitting relationship.

[0102] In some embodiments of the present application, the battery management device superimposes the current disturbance signal on the batteries in different aging states respectively, and continues for a preset time period to obtain a first test voltage signal and a first test current signal. The first test voltage signal and the first test current signal are subjected to time-frequency conversion analysis to obtain a first test impedance at a characteristic frequency; the temperature corresponding to the batteries in different aging states is fitted with the first test impedance to determine a preset temperature-impedance fitting relationship.

[0103] For example, the impedance at 25, 30, 35, and 40°C is calculated, and a fitting relationship is made for the temperature. The corresponding trend relationship is y=2.0246x+132.87, that is, the relationship between temperature and impedance is that the impedance value decreases by 2.0246 mΩ for every degree increase in temperature. y=2.0246x+132.87 is the preset temperature-impedance fitting relationship.

[0104] It should be noted that, when the battery power is determined, the corresponding preset temperature-impedance fitting relationship is different for different battery power.

[0105] S1052: When the temperature of the battery test environment is determined, at different preset power levels, current disturbance signals are superimposed on batteries in different aging states according to preset time periods to determine a preset power impedance fitting relationship.

[0106] In an embodiment of the present application, after obtaining the corresponding relationship between the preset health and impedance of the battery in different aging states, the battery management device adjusts the power size when the temperature of the battery test environment is determined, and superimposes current disturbance signals on the batteries in different aging states at different preset power levels to determine the preset power-impedance fitting relationship.

[0107] In some embodiments of the present application, the battery management device superimposes the current disturbance signal on the batteries in different aging states respectively, and continues for a preset time period to obtain a second test voltage signal and a second test current signal. The second test voltage signal and the second test current signal are subjected to time-frequency conversion analysis to obtain a second test impedance at a characteristic frequency; the power corresponding to the batteries in different aging states is fitted with the second test impedance to determine a preset power impedance fitting relationship.

[0108] Exemplarily, when calculating the impedance Zn, the batteries in different states (SOC) are then placed at the same temperature, such as 30% SOC, 35% SOC, and the impedance Zn' (i.e., the second impedance) under the corresponding SOC is calculated at the same time, and the corresponding charge of the batteries in different aging states is fitted with Zn' to determine the preset charge-impedance fitting relationship.

[0109] S1053: Use the preset temperature impedance fitting relationship and the preset electric quantity impedance fitting relationship as the preset impedance fitting relationship.

[0110] In the embodiment of the present application, the battery management device may use the preset temperature impedance fitting relationship and the preset power impedance fitting relationship as the preset impedance fitting relationship.

[0111] It can be understood that, when the battery power is determined, at different preset temperatures, current disturbance signals are superimposed on batteries in different aging states according to preset time periods to determine the preset temperature-impedance fitting relationship; when the temperature of the battery test environment is determined, at different preset power levels, current disturbance signals are superimposed on batteries in different aging states according to preset time periods to determine the preset power-impedance fitting relationship; the preset temperature-impedance fitting relationship and the preset power-impedance fitting relationship are used as the preset impedance fitting relationship; after the preset impedance fitting relationship is determined, it is convenient to subsequently determine the impedance of the battery to be tested according to the preset impedance fitting relationship.

[0112] In some embodiments of the present application, determining the correspondence between the preset health and impedance, the preset temperature-impedance fitting relationship, and the preset power-impedance fitting relationship can be achieved in the following ways:

[0113] (1) Select several lithium-ion batteries that have not just left the factory and age them according to a set aging path (conventional battery aging such as 0.5C charging and then 0.5C discharging cycle testing at 25°C). Then, take out the batteries in different aging states (different health levels of the batteries) and place them at a specific ambient temperature (fixed temperature) to test the target specific physical quantity of the batteries in that state (i.e., health level).

[0114] It should be noted that the number of battery samples is ≥2, preferably 3; the specific aging path can be conventional battery aging such as 0.5C charging and then 0.5C discharging cycle test at 25°C, or it can be an accelerated aging path, such as high temperature aging 50°C high temperature cycle test 1C charging 0.5C discharging, and the battery aging path of this application is not limited. The battery target specific physical quantity refers to the target value during actual use, such as the remaining capacity of the battery, the thickness of the battery, the temperature of the battery, and the power of the battery; wherein the battery capacity calculation method is preferably the rated capacity measurement method of the battery, such as the capacity discharged at 0.2C at 25°C, or it can be the capacity measurement at other rates, such as 1C, 0.5C, 2C, etc. The specific ambient temperature refers to the specific standard definition of the battery during actual use, such as the remaining capacity standard of 25°C, which is unified before and after; different aging states generally refer to different health levels of the battery, i.e. 100%, 95%, 90%, etc.

[0115] (2) During the charging process, the batteries in different aging states in step (1) are placed at a set temperature value (25 degrees) and a specific SOC (50% power), and a specific current disturbance signal is superimposed for a duration of t (t≥2 / fn), and the voltage and current values ​​of the battery are recorded simultaneously to obtain voltage and current signals at a collection frequency (fs≥2fn).

[0116] It should be noted that the set temperature value is kept consistent with the temperature of the test target physical quantity in step (1); the specific SOC is calculated by fixing an SOC value, that is, the SOC value is used under different aging conditions. The superimposed specific current disturbance signal includes a square wave signal and a sinusoidal signal. If it is a sinusoidal signal, it is preferably characterized by being generated by superposition of sinusoidal waves of multiple frequencies, and its mean is 0; it can also be a square wave signal, and the current step size △I ≥ 500mA, that is, for example, using 1000mA to charge t / 2, and then using 500mA to charge t / 2. If the current signal is a square wave signal, the current does not need to be continuous and constant, and slight fluctuations in the current can be accepted. The fluctuation value is less than or equal to 500mA, preferably less than or equal to 200mA. For example, when charging at 1000mA, it can be between 1100 and 900mA. The charging duration t is greater than or equal to twice the inverse of the frequency in the specific frequency impedance selected in step (4), that is, t≥2 / fn, preferably t≥10 / fn; the collected battery current frequency fs under the current disturbance signal is greater than or equal to twice the frequency in the specific frequency impedance selected in step (4), that is, fs≥2fn, preferably fs≥10fn.

[0117] (3) Perform time-frequency conversion analysis (wavelet transform method or windowed Fourier transform method) on the current and voltage signals collected in step (2), and obtain the impedance Z = [Z1, Z2, Z3, ... Zn] corresponding to the characteristic frequency f = [f1, f2, f3, ... fn].

[0118] It should be noted that the time-frequency conversion analysis method includes wavelet transform or windowed Fourier transform for time-frequency analysis. The characteristic frequency is preferably 0.01 Hz to 60 Hz, and particularly preferably 0.1 to 5 Hz.

[0119] (4) The target specific physical quantity of the battery recorded in step (1) is fitted with the impedance value Zn at a specific frequency (one of the characteristic frequencies) in step (3) to obtain a fitting function y=f'(Zn), thereby obtaining the corresponding relationship between the target specific physical quantity value and the impedance of the battery under different aging conditions.

[0120] It should be noted that the corresponding relationship between the target specific physical quantity value and the impedance is the corresponding relationship between the preset health degree and the impedance.

[0121] (5) Repeat steps (2) to (3), adjust the temperature and SOC in step (2), and record the calculated corresponding impedance value Zn'.

[0122] (6) Fitting the relationship between Zn and Zn' in step (4) at different temperatures and SOC sizes to obtain the function Zn = f'(Zn'), that is, the relationship between impedance and temperature, and the relationship between impedance and SOC.

[0123] It should be noted that the relationship between impedance and temperature is the preset temperature impedance fitting relationship, and the relationship between impedance and SOC is the preset power impedance fitting relationship. The fitting relationship can be obtained by linear fitting, segmented difference fitting, etc.

[0124] (7) Output model, i.e., the correspondence between the target specific physical quantity of the battery and the impedance under different aging conditions, and the relationship between the impedance, temperature and SOC (i.e., the relationship between the impedance and temperature, and the relationship between the impedance and SOC in step 6).

[0125] Exemplarily, the battery health can be calculated in the following way:

[0126] 1) Select 2 pcs of batteries and age them for 100 cycles at 0.5C charge and 1C discharge at 45°C. Then place the batteries at 25°C and use 1C discharge test to obtain the battery capacity Qmax. The battery health is 94%.

[0127] 2) Discharge the battery to 50% and place it in a 25°C environment. The current disturbance signal added is a square wave signal, such as Figure 6 As shown in the figure, the battery is charged at 2A for 10s, then at 1A for 10s. At the same time, the battery sampling frequency is 1s and the sampling time is 20s. The collected voltage signal is as follows Figure 7 As shown, the voltage changes in the range of 4.24V-4.25V before 10s, and in the range of 4.25V-4.18V from 10s to 20s.

[0128] 3) The impedance Zn at a frequency of 0.05 Hz is decomposed by Fourier transform.

[0129] 4) Then repeat the test on the batteries in different aging states to obtain the corresponding relationship between the health value and Zn, such as Figure 8 As shown, m=-0.0024n+1.1478; n is the impedance value, and m is the health level.

[0130] 5) When calculating the impedance Zn, the battery in the same state is then placed at different temperatures, such as 30°C, 35°C, and the impedance Zn' at the corresponding temperature is calculated.

[0131] 6) As shown in Table 1, the impedances at 25, 30, 35, and 40°C are calculated to be 82.65459 mΩ, 71.43848 mΩ, 62.1718 mΩ, and 52 mΩ, respectively. The temperature is fitted, and the corresponding trend relationship is y=2.0246x+132.87, that is, the relationship between temperature and impedance is that the impedance value decreases by 2.0246 mΩ for every degree increase; x is temperature, and y is impedance.

[0132] Table 1

[0133] Temperature / degrees 25 30 35 40 Impedance / mΩ 82.65459 71.43848 62.1718 52

[0134] 7) For example, when the whole machine is in use, the impedance value at 50% SOC and 36° C. is calculated to be 65 mΩ, and the impedance at 25° C. in the corresponding modeling is 65+11*2.0246=87.2706 mΩ.

[0135] 8) Then, the impedance is brought into the relationship model between health and impedance in 4), and the health measure of the battery at this moment is calculated to be m=-0.0024*87.2706+1.1478=0.938.

[0136] It is understandable that the accuracy of the battery model is affected by external environmental factors such as battery temperature and power under the terminal's operating conditions, thereby making the battery model more accurate and more suitable for the actual use of the terminal.

[0137] Based on the battery management method of the above embodiment, the present application embodiment also provides a battery management device, such as Fig. 9 As shown, Fig. 9 A schematic diagram of a battery management structure provided in an embodiment of the present application, the battery management device 9 includes: a determination unit 901, wherein:

[0138] The determination unit 901 is used to determine the power of the battery to be tested and the temperature of the test environment; through a preset health determination model, the power and the temperature are calculated to determine the health of the battery to be tested; the preset health determination model characterizes the influence of the battery power and temperature on the health of the battery.

[0139] In some embodiments of the present application, the preset health determination model includes: a preset impedance fitting relationship and a preset corresponding relationship between health and impedance;

[0140] The determination unit 901 is further used to calculate the power and the temperature through the preset impedance fitting relationship to determine the impedance of the battery to be tested; the preset impedance fitting relationship represents the relationship between impedance, power and temperature; the impedance of the battery to be tested is calculated through the preset correspondence between health and impedance to determine the health of the battery to be tested; the preset correspondence between health and impedance represents the change pattern of battery health as impedance changes.

[0141] In some embodiments of the present application, the preset impedance fitting relationship includes: a preset temperature impedance fitting relationship;

[0142] The determination unit 901 is further used to determine the standard temperature and the first impedance corresponding to the preset temperature-impedance fitting relationship under the power level; perform calculations based on the standard temperature, the first impedance, the preset temperature-impedance fitting relationship and the temperature to determine the impedance of the battery to be tested.

[0143] In some embodiments of the present application, the preset impedance fitting relationship includes: a preset electrical quantity impedance fitting relationship;

[0144] The determination unit 901 is further used to determine the standard power and the second impedance corresponding to the preset power-impedance fitting relationship at the temperature; perform calculations based on the standard power, the second impedance, the preset power-impedance fitting relationship and the power to determine the impedance of the battery to be tested.

[0145] In some embodiments of the present application, the determination unit 901 is further used to determine a temperature difference based on the standard temperature and the temperature; perform calculations based on the preset temperature-impedance fitting relationship and the temperature difference to determine an impedance change value; and perform calculations based on the first impedance and the impedance change value to determine the impedance of the battery to be tested.

[0146] In some embodiments of the present application, the battery management device 9 further includes: an acquisition unit 902;

[0147] The acquisition unit 902 is configured to calculate the power and the temperature by using a preset health determination model, and before determining the health of the battery to be tested, perform an aging process on at least one battery to obtain batteries in different aging states;

[0148] The determination unit 901 is further used to determine the health corresponding to the battery in the different aging states; at the target temperature and the target power, the current disturbance signal is superimposed on the batteries in the different aging states according to the preset time period to determine the corresponding relationship between the preset health and the impedance of the batteries in the different aging states; at different preset temperatures or different preset powers, the current disturbance signal is superimposed on the batteries in the different aging states according to the preset time period to determine the preset impedance fitting relationship; the corresponding relationship between the preset health and impedance and the preset impedance fitting relationship are determined as the preset health determination model.

[0149] In some embodiments of the present application, the acquisition unit 902 is used to superimpose the current disturbance signal on the batteries in different aging states respectively according to the preset time period at the target temperature and the target power, and sample at the preset acquisition frequency to obtain the voltage signal and the current signal; perform time-frequency conversion analysis on the voltage signal and the current signal to obtain the impedance corresponding to the characteristic frequency;

[0150] The determination unit 901 is further used to perform fitting based on the health corresponding to the battery under different aging conditions and the impedance value under a specific frequency, so as to determine the corresponding relationship between the preset health and impedance of the battery under different aging conditions; the impedance value under the specific frequency is the impedance value under any frequency of the characteristic frequencies.

[0151] In some embodiments of the present application, the determination unit 901 is also used to, when the battery power is determined, at different preset temperatures, respectively superimpose current disturbance signals on the batteries in the different aging states according to the preset time periods to determine a preset temperature-impedance fitting relationship; when the temperature of the battery test environment is determined, at different preset power levels, respectively superimpose current disturbance signals on the batteries in the different aging states according to the preset time periods to determine a preset power-impedance fitting relationship; and use the preset temperature-impedance fitting relationship and the preset power-impedance fitting relationship as the preset impedance fitting relationship.

[0152] Based on the battery management method of the above embodiment, the present application embodiment also provides a battery management device, such as Fig.10 As shown, Fig.10 A schematic diagram of the structure of a battery management device provided in an embodiment of the present application is provided, and the battery management device 10 includes: a processor 1001 and a memory 1002. The memory 1002 is used to store a computer program; the processor 1001 is used to call and run the computer program from the memory to execute the battery management method as described in the above embodiment.

[0153] In the embodiment of the present application, the processor 1001 may be at least one of an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a central processing unit (CPU), a controller, a microcontroller, and a microprocessor. It is understandable that for different devices, the electronic device used to implement the function of the processor may also be other, and the embodiment of the present application does not specifically limit it.

[0154] An embodiment of the present application provides a computer-readable storage medium storing a computer program for implementing the battery management method described in any of the above embodiments when executed by a processor.

[0155] Exemplarily, program instructions corresponding to a battery management method in this embodiment can be stored on a storage medium such as a CD, a hard disk, or a USB flash drive. When the program instructions corresponding to a battery management method in the storage medium are read or executed by an electronic device, the battery management method described in any of the above embodiments can be implemented.

[0156] In addition, each functional module in the 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 software functional modules.

[0157] If the integrated unit is implemented in the form of a software function module and is not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment is essentially or the part that contributes to the prior art or the whole or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the method of this embodiment. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0158] It should be understood that "one embodiment" or "an embodiment" or "some embodiments" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in one embodiment" or "in some embodiments" appearing throughout the specification may not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above description of each embodiment tends to emphasize the differences between the various embodiments, and the same or similar aspects can be referenced to each other. For the sake of brevity, this article will not repeat them.

[0159] The modules described above as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules; 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 present embodiment.

[0160] In addition, all functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may be a separate unit, or two or more modules may be integrated into one unit; the above-mentioned integrated modules may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0161] A person skilled in the art can understand that all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), magnetic disks or optical disks, etc., various media that can store program codes.

[0162] The methods disclosed in several method embodiments provided in the embodiments of the present application can be arbitrarily combined without conflict to obtain new method embodiments.

[0163] The features disclosed in several product embodiments provided in the embodiments of the present application can be arbitrarily combined without conflict to obtain new product embodiments.

[0164] The features disclosed in several method or device embodiments provided in the embodiments of the present application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0165] The above is only an implementation method of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiment of the present application should be based on the protection scope of the claims.

Claims

1. A battery management method, characterized in that: include: Determine the battery capacity of the battery to be tested and the temperature of the test environment; The health of the battery to be tested is determined by calculating the power and the temperature through a preset health determination model; the preset health determination model characterizes the influence of the battery power and temperature on the health of the battery.

2. The method according to claim 1, characterized in that The preset health determination model includes: a preset impedance fitting relationship and a preset corresponding relationship between health and impedance; The step of calculating the power and the temperature by using a preset health determination model to determine the health of the battery to be tested includes: The electric quantity and the temperature are calculated by the preset impedance fitting relationship to determine the impedance of the battery to be tested; the preset impedance fitting relationship represents the relationship between impedance, electric quantity and temperature; The impedance of the battery to be tested is calculated through the corresponding relationship between the preset health and impedance to determine the health of the battery to be tested; the corresponding relationship between the preset health and impedance represents the changing rule of the battery health with the change of impedance.

3. The method according to claim 2, characterized in that The preset impedance fitting relationship includes: a preset temperature impedance fitting relationship; The step of calculating the electric quantity and the temperature by using the preset impedance fitting relationship to determine the impedance of the battery to be tested includes: Under the electrical quantity, determining the standard temperature and the first impedance corresponding to the preset temperature-impedance fitting relationship; An operation is performed according to the standard temperature, the first impedance, the preset temperature-impedance fitting relationship and the temperature to determine the impedance of the battery to be tested.

4. The method according to claim 2, characterized in that: The preset impedance fitting relationship includes: a preset electrical quantity impedance fitting relationship; The step of calculating the electric quantity and the temperature by using the preset impedance fitting relationship to determine the impedance of the battery to be tested includes: At the temperature, determining a standard electrical quantity and a second impedance corresponding to the preset electrical quantity-impedance fitting relationship; An operation is performed based on the standard electric quantity, the second impedance, the preset electric quantity-impedance fitting relationship and the electric quantity to determine the impedance of the battery to be tested.

5. The method according to claim 3, characterized in that: The step of performing calculation according to the standard temperature, the first impedance, the preset temperature-impedance fitting relationship and the temperature to determine the impedance of the battery to be tested includes: Determining a temperature difference according to the standard temperature and the temperature; Performing calculations based on the preset temperature-impedance fitting relationship and the temperature difference to determine an impedance change value; An operation is performed according to the first impedance and the impedance change value to determine the impedance of the battery to be tested.

6. The method according to any one of claims 1 to 5, characterized in that: Before calculating the power and the temperature by using a preset health determination model to determine the health of the battery to be tested, the method further includes: Performing an aging process on at least one battery to obtain batteries in different aging states; and determining the health status corresponding to the batteries in the different aging states; At the target temperature and target power, respectively superimposing the current disturbance signal on the batteries in the different aging states according to the preset time periods, and determining the corresponding relationship between the preset health and impedance of the batteries in the different aging states; At different preset temperatures or different preset capacities, respectively superimposing current disturbance signals on the batteries in the different aging states according to the preset time periods to determine a preset impedance fitting relationship; The corresponding relationship between the preset health degree and the impedance and the preset impedance fitting relationship are determined as the preset health degree determination model.

7. The method according to claim 6, characterized in that The method of superimposing current disturbance signals on the batteries in different aging states respectively according to preset time periods under the target temperature and target power to determine the corresponding relationship between the preset health and impedance of the batteries in different aging states includes: At the target temperature and target power, respectively superimposing the current disturbance signal on the batteries in the different aging states according to the preset time period, and sampling at the preset acquisition frequency to obtain the voltage signal and the current signal; Performing time-frequency conversion analysis on the voltage signal and the current signal to obtain impedance corresponding to the characteristic frequency; Fitting is performed based on the corresponding health of the battery under different aging states and the impedance value under a specific frequency to determine the corresponding relationship between the preset health and impedance of the battery under different aging states; the impedance value under the specific frequency is the impedance value under any frequency of the characteristic frequencies.

8. The method according to claim 6, characterized in that The method of respectively superimposing current disturbance signals on the batteries in the different aging states according to the preset time periods at different preset temperatures or different preset capacities to determine a preset impedance fitting relationship includes: When the battery power is determined, at different preset temperatures, current disturbance signals are respectively superimposed on the batteries in the different aging states according to the preset time periods to determine a preset temperature-impedance fitting relationship; When the temperature of the battery test environment is determined, at different preset power levels, current disturbance signals are respectively superimposed on the batteries in the different aging states according to the preset time periods to determine a preset power impedance fitting relationship; The preset temperature impedance fitting relationship and the preset quantity impedance fitting relationship are used as the preset impedance fitting relationship.

9. A battery management device, characterized in that: include: Determine the unit, where The determining unit is used to determine the power level of the battery to be tested and the temperature of the test environment; The health of the battery to be tested is determined by calculating the power and the temperature through a preset health determination model; the preset health determination model characterizes the influence of the battery power and temperature on the health of the battery.

10. A battery management device, characterized in that: include: processor and memory, wherein The memory is used to store computer programs; The processor is configured to call and run the computer program from the memory to execute the method according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that: Executable instructions are stored, which are used to cause a processor to execute and implement the method described in any one of claims 1 to 8.

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