Lithium battery temperature control strategy adjustment method and system based on environmental monitoring

Abstract

The present application relates to the technical field of battery temperature control, and discloses a method and system for adjusting lithium battery temperature control strategy based on environmental monitoring, the method comprising obtaining environmental monitoring data and environmental prediction data, generating an environmental thermal change time relationship curve of a target lithium battery; obtaining historical operating condition characteristic information of the target lithium battery, generating an operating thermal change time relationship curve of the target lithium battery; generating a comprehensive thermal change time relationship curve based on the environmental thermal change time relationship curve and the operating thermal change time relationship curve, and determining the periodic thermal change values ​​and critical temperature control cycles of several future temperature control cycles in combination with preset early warning thermal values; generating a temperature control execution instruction and sending it to the temperature control device corresponding to the target lithium battery when the next temperature control cycle is a critical temperature control cycle or the periodic thermal change value of the next temperature control cycle is greater than a preset thermal change threshold; the present application has the effect of improving the response speed of lithium battery temperature control.

Description

Technical Field

[0001] The present application relates to the technical field of battery temperature control, and in particular to a method and system for adjusting a lithium battery temperature control strategy based on environmental monitoring. Background Art

[0002] Lithium batteries need to work at a specific temperature. If the lithium battery is in an environment with too low a temperature, the discharge capacity of the lithium battery will be weakened, or even cause permanent damage. If the lithium battery is in an environment with too high a temperature, the chemical balance within the battery will be destroyed, making the lithium battery prone to safety accidents. On the other hand, the normal operation of the lithium battery itself will continue to generate heat, and this heat will also cause the temperature of the lithium battery to rise.

[0003] Currently, the main method for temperature control of lithium batteries is to detect the temperature of the lithium battery. When the temperature of the lithium battery is high, the heat dissipation device is controlled to work, and when the temperature of the lithium battery is low, the heating device is controlled to work, so as to achieve the effect of maintaining the lithium battery in a specific temperature range. However, it takes time to adjust the temperature of the battery to the target temperature value, so the above-mentioned related technologies have the problem of slow response speed for lithium battery temperature control. Summary of the Invention

[0004] In order to improve the response speed to lithium battery temperature control, the present application provides a lithium battery temperature control strategy adjustment method and system based on environmental monitoring.

[0005] The first object of the invention of this application is achieved by adopting the following technical solution:

[0006] The lithium battery temperature control strategy adjustment method based on environmental monitoring includes:

[0007] Obtain environmental monitoring data and environmental prediction data to evaluate the heat exchange between the target lithium battery and the environment, and generate a time-dependent curve of the environmental thermal change of the target lithium battery;

[0008] Obtain historical operating condition characteristic information of the target lithium battery to predict the operating heat generation of the target lithium battery and generate a time relationship curve of the operating heat change of the target lithium battery;

[0009] Based on the environmental heat change time relationship curve and the working heat change time relationship curve, a comprehensive heat change time relationship curve is generated. Based on the comprehensive heat change time relationship curve and the preset warning heat value, the periodic heat change value and the critical temperature control cycle of several future temperature control cycles are determined;

[0010] When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to the temperature control device corresponding to the target lithium battery;

[0011] The environmental monitoring data includes actual temperature data and actual humidity data; the environmental prediction data includes local temperature forecast data, rainfall forecast data, wind speed forecast data, and light forecast data; the periodic thermal change value refers to the heat change value within the corresponding temperature control cycle; the critical temperature control cycle refers to the temperature control cycle in which the heat of the target lithium battery reaches the warning thermal value.

[0012] By adopting the above technical solution, since the temperature of the lithium battery will be affected by external heat exchange and its own heat generation, its change pattern is relatively complex. Environmental monitoring data and environmental prediction data are obtained to analyze the heat exchange between the target lithium battery and the environment based on the current measured conditions and future predictions of the environment in which the target lithium battery is located, and then generate the environmental heat change time relationship curve of the target lithium battery; obtain the historical operating information of the target lithium battery to analyze the historical working conditions of the target lithium battery, and then predict the working heat generation of the target lithium battery, thereby generating the working heat change time relationship curve of the target lithium battery; combine the environmental heat change time relationship curve and the working heat change time relationship curve to determine the combination of environmental heat conduction and lithium battery working heat generation factors. The comprehensive thermal change time relationship curve is used to determine the periodic thermal change values ​​in several future temperature control cycles and the critical temperature control cycle in which the heat of the target lithium battery reaches the warning thermal value according to the comprehensive thermal change time relationship curve and the warning thermal value; when the next temperature control cycle is the critical temperature control cycle or the periodic thermal change value of the next temperature control cycle is greater than the thermal change threshold, a temperature control execution instruction is generated, thereby adjusting the temperature of the target lithium battery according to the prediction of the environment and the working state of the target lithium battery. At the same time, on the basis of setting the upper and lower limit thresholds of the temperature adjustment by the conventional temperature control method, a scheme for adjusting the temperature of the target lithium battery when the temperature of the lithium battery changes suddenly is added, thereby reducing the possibility of lithium battery damage or safety accidents caused by sudden changes in the temperature of the lithium battery, and improving the response speed of temperature control of the lithium battery.

[0013] In a preferred example of the present application: the temperature control execution instruction includes a first battery temperature target value;

[0014] When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to the temperature control device corresponding to the target lithium battery, including:

[0015] When the next temperature control cycle is a critical temperature control cycle, a first battery temperature target value is calculated; the calculation formula for the first battery temperature target value is:

[0016] T g1 =Δ0+k1Δ1+k2Δ2;

[0017] Generate a temperature control execution instruction based on the first battery temperature target value and send it to the temperature control device corresponding to the target lithium battery;

[0018] Wherein, k1 is the first coefficient, k2 is the second coefficient, Δ0 is the standard temperature difference parameter, Δ1 is the ambient temperature difference parameter, and Δ2 is the working temperature difference parameter;

[0019] The calculation formula of the ambient temperature difference parameter is:

[0020]

[0021] The calculation formula of the working temperature difference parameter is:

[0022]

[0023] T I is the indoor temperature of the current temperature control cycle, T Oi is the outdoor temperature of the current or future temperature control cycle, i is the temperature control cycle number, the current temperature control cycle number is 1, and j is the number of sampled temperature control cycles; Q i The heat generated by the target lithium battery for the current or future temperature control cycle, is the average specific heat capacity of the target lithium battery.

[0024] By adopting the above technical solution, the temperature control execution instruction includes a function for determining a first battery temperature target value for the target lithium battery temperature control target. When the next temperature control cycle is a critical temperature control cycle, the first battery temperature target value is calculated, wherein the first battery temperature target value is obtained by weighted summation of the standard temperature difference parameter, the ambient temperature difference parameter and the operating temperature difference parameter. The standard temperature difference parameter is used to determine the first battery temperature target value without considering the ambient temperature difference and the heat dissipation of the lithium battery. The ambient temperature difference parameter and the operating temperature difference parameter are used to determine the influence of the ambient temperature difference and the heat dissipation of the lithium battery on the target lithium battery temperature. The ambient temperature difference parameter takes into account the influence of the temperature difference between the indoor temperature and the average outdoor temperature in the future period of time, and the operating temperature difference parameter takes into account the influence of the heat generation of the target lithium battery in the future period of time. A temperature control execution instruction is generated according to the first battery temperature target value and sent to the temperature control device to control the temperature of the target lithium battery.

[0025] In a preferred example of the present application: the temperature control execution instruction includes a second battery temperature target value;

[0026] When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to the temperature control device corresponding to the target lithium battery, including:

[0027] When the periodic thermal change value of the next temperature control cycle is greater than the preset thermal change threshold, a second battery temperature target value is calculated; the calculation formula of the second battery temperature target value is:

[0028]

[0029] Generate a temperature control execution instruction based on the second battery temperature target value and send it to the temperature control device corresponding to the target lithium battery;

[0030] Among them, Q2 is the periodic thermal change value of the next temperature control cycle.

[0031] By adopting the above technical solution, the temperature control execution instruction includes a second battery temperature target value. When the cycle thermal change value of the next temperature control cycle is greater than the thermal change threshold, the second battery temperature target value is calculated, wherein the second battery temperature target value is proportional to the temperature increment of the target lithium battery in the next temperature control cycle; a temperature control execution instruction is generated according to the second battery temperature target value and sent to the temperature control device to control the temperature of the target lithium battery.

[0032] In a preferred embodiment of the present application, the environmental monitoring data and environmental prediction data are obtained to evaluate the heat exchange between the target lithium battery and the environment, and to generate an environmental thermal change time relationship curve of the target lithium battery, including:

[0033] Obtain environmental monitoring data and environmental prediction data, and revise environmental prediction data based on the environmental monitoring data;

[0034] Evaluate the heat exchange between the target lithium battery and the environment during several future temperature control cycles based on the revised environmental prediction data;

[0035] Record the initial calorific value of the target lithium battery, the start and end time nodes of each temperature control cycle, and the ambient heat exchange calorific value, and generate a time relationship curve of the ambient heat change;

[0036] The environmental heat exchange calorific value refers to the heat exchange calorific value between the target lithium battery and its environment within a temperature control cycle.

[0037] By adopting the above technical solution, environmental monitoring data and environmental prediction data are obtained, so that the environmental prediction data can be corrected through the measured environmental monitoring data to improve the reliability of the environmental prediction data; based on the corrected environmental prediction data, the heat exchange between the target lithium battery and its environment in several future temperature control cycles is evaluated; the initial calorific value of the target lithium battery, the start and end time nodes of each temperature control cycle, and the heat exchange calorific value between the target lithium battery and its environment in each temperature control cycle are recorded, and then an environmental heat change time relationship curve is generated to understand the change in heat over time caused by the target lithium battery being affected by its environment.

[0038] In a preferred example of the present application: the historical operating condition characteristic information includes a charging power-time curve and a discharging power-time curve of the target lithium battery;

[0039] The acquiring of historical operating condition characteristic information of the target lithium battery to predict the operating heat generation of the target lithium battery and generate a time relationship curve of the operating heat change of the target lithium battery includes:

[0040] Obtain historical operating condition characteristic information of the target lithium battery, and determine the charging power-time curve, discharging power-time curve and battery performance parameters of the target lithium battery;

[0041] Based on the charging power-time curve, the discharging power-time curve and the battery performance parameters of the target lithium battery, a working thermal change time relationship curve of the target lithium battery is generated.

[0042] By adopting the above technical solution, the historical operating condition characteristic information of the target lithium battery is obtained to determine the historical charging power-time curve and discharging power-time curve of the target lithium battery and the battery performance parameters used to record the relationship between the charging and discharging power and the heat generation power; based on the charging power-time curve, the discharging power-time curve and the battery performance parameters of the target lithium battery, the operating heat generation of the target lithium battery is evaluated, and then the operating heat change time relationship curve of the target lithium battery is generated, thereby achieving the effect of predicting the future operating heat generation of the target lithium battery.

[0043] The second object of the invention of this application is achieved by the following technical solution:

[0044] A lithium battery temperature control strategy adjustment system based on environmental monitoring, applied to any of the above-mentioned lithium battery temperature control strategy adjustment methods based on environmental monitoring, includes:

[0045] Environmental thermal change analysis module, used to obtain environmental monitoring data and environmental prediction data to evaluate the heat exchange between the target lithium battery and the environment, and generate the environmental thermal change time relationship curve of the target lithium battery;

[0046] The working heat variation analysis module is used to obtain the historical operating condition characteristic information of the target lithium battery to predict the working heat generation of the target lithium battery and generate the working heat variation time relationship curve of the target lithium battery;

[0047] The comprehensive thermal change analysis module is used to generate a comprehensive thermal change time relationship curve based on the environmental thermal change time relationship curve and the working thermal change time relationship curve, and determine the periodic thermal change values ​​and critical temperature control cycles of several future temperature control cycles based on the comprehensive thermal change time relationship curve and the preset early warning thermal value;

[0048] A temperature control execution module is used to generate a temperature control execution instruction and send it to the temperature control device corresponding to the target lithium battery when the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold;

[0049] The environmental monitoring data includes actual temperature data and actual humidity data; the environmental prediction data includes local temperature forecast data, rainfall forecast data, wind speed forecast data, and light forecast data; the periodic thermal change value refers to the heat change value within the corresponding temperature control cycle; the critical temperature control cycle refers to the temperature control cycle in which the heat of the target lithium battery reaches the warning thermal value.

[0050] In a preferred embodiment of the present application, the environmental thermal change analysis module includes:

[0051] An environmental prediction data correction submodule is used to obtain environmental monitoring data and environmental prediction data, and to correct the environmental prediction data based on the environmental monitoring data;

[0052] The environmental heat exchange evaluation submodule is used to evaluate the heat exchange between the target lithium battery and the environment in several future temperature control cycles based on the revised environmental prediction data;

[0053] The submodule for generating the time relationship curve of the environmental thermal change is used to record the initial heat value of the target lithium battery, the start and end time nodes of each temperature control cycle, and the environmental heat exchange heat value, and generate the time relationship curve of the environmental thermal change;

[0054] The environmental heat exchange calorific value refers to the heat exchange calorific value between the target lithium battery and its environment within a temperature control cycle.

[0055] In a preferred example of the present application, the working thermal change analysis module includes:

[0056] The historical operating condition characteristic information analysis submodule is used to obtain the historical operating condition characteristic information of the target lithium battery and determine the charging power-time curve, discharge power-time curve and battery performance parameters of the target lithium battery;

[0057] A working thermal variation time relationship curve generation submodule is used to generate a working thermal variation time relationship curve of a target lithium battery based on the charging power-time curve, the discharging power-time curve and the battery performance parameters of the target lithium battery;

[0058] The historical operating condition characteristic information includes a charging power-time curve and a discharging power-time curve of the target lithium battery.

[0059] The third invention objective of this application is achieved by the following technical solution:

[0060] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned method for adjusting the lithium battery temperature control strategy based on environmental monitoring are implemented.

[0061] The fourth object of the invention of this application is achieved by the following technical solution:

[0062] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for adjusting the lithium battery temperature control strategy based on environmental monitoring.

[0063] In summary, this application includes at least one of the following beneficial technical effects:

[0064] 1. Since the temperature of the lithium battery is affected by external heat exchange and its own heat generation, its change pattern is relatively complex. Environmental monitoring data and environmental prediction data are obtained to analyze the heat exchange between the target lithium battery and the environment based on the current measured conditions and future predictions of the environment in which the target lithium battery is located, and then generate the environmental heat change time relationship curve of the target lithium battery; obtain the historical operating information of the target lithium battery to analyze the historical working conditions of the target lithium battery, and then predict the working heat generation of the target lithium battery, so as to generate the working heat change time relationship curve of the target lithium battery; combine the environmental heat change time relationship curve and the working heat change time relationship curve to determine the comprehensive thermal change after combining the environmental heat conduction and the lithium battery working heat generation factors. The time relationship curve of the comprehensive thermal change time relationship curve and the warning thermal value are used to determine the periodic thermal change values ​​in several future temperature control cycles and the critical temperature control cycle in which the heat of the target lithium battery reaches the warning thermal value; when the next temperature control cycle is the critical temperature control cycle or the periodic thermal change value of the next temperature control cycle is greater than the thermal change threshold, a temperature control execution instruction is generated, thereby adjusting the temperature of the target lithium battery according to the prediction of the environment and the working status of the target lithium battery. At the same time, on the basis of setting the upper and lower limit thresholds of the temperature adjustment by the conventional temperature control method, a scheme for adjusting the temperature of the target lithium battery when the temperature of the lithium battery changes suddenly is added, thereby reducing the possibility of lithium battery damage or safety accidents caused by sudden temperature changes of the lithium battery, and improving the energy efficiency level of temperature control of the lithium battery.

[0065] 2. The temperature control execution instruction includes a function for determining a first battery temperature target value for the target lithium battery temperature control target. When the next temperature control cycle is a critical temperature control cycle, the first battery temperature target value is calculated, wherein the first battery temperature target value is obtained by weighted summation of a standard temperature difference parameter, an ambient temperature difference parameter and an operating temperature difference parameter. The standard temperature difference parameter is used to determine the first battery temperature target value without considering the ambient temperature difference and the heat dissipation of the lithium battery. The ambient temperature difference parameter and the operating temperature difference parameter are used to determine the influence of the ambient temperature difference and the heat dissipation of the lithium battery on the target lithium battery temperature. The ambient temperature difference parameter takes into account the influence of the temperature difference between the indoor temperature and the average outdoor temperature in the future period of time, and the operating temperature difference parameter takes into account the influence of the heat generation of the target lithium battery in the future period of time. A temperature control execution instruction is generated according to the first battery temperature target value and sent to the temperature control device to control the temperature of the target lithium battery.

[0066] 3. The temperature control execution instruction includes a second battery temperature target value. When the cycle thermal change value of the next temperature control cycle is greater than the thermal change threshold, the second battery temperature target value is calculated, where the second battery temperature target value is proportional to the temperature increment of the target lithium battery in the next temperature control cycle; a temperature control execution instruction is generated based on the second battery temperature target value and sent to the temperature control device to control the temperature of the target lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 This is a flow chart of a lithium battery temperature control strategy adjustment method based on environmental monitoring in Example 1 of the present application.

[0068] Figure 2 This is a principle block diagram of the lithium battery temperature control strategy adjustment system based on environmental monitoring in Example 2 of the present application.

[0069] Figure 3 This is a schematic diagram of the equipment in Example 3 of the present application. DETAILED DESCRIPTION

[0070] The following is combined with Figures 1 to 3 This application is described in further detail.

[0071] Example 1

[0072] Reference Figure 1 This application discloses a method for adjusting the temperature control strategy of a lithium battery based on environmental monitoring, which specifically includes the following steps:

[0073] S10: Acquire environmental monitoring data and environmental prediction data to evaluate the heat exchange between the target lithium battery and the environment, and generate an environmental thermal change time relationship curve of the target lithium battery.

[0074] In this embodiment, the specific heat capacity of the target lithium battery as a whole is fixed, so the heat generation and heat dissipation of the target lithium battery can be converted into temperature increase and temperature decrease; the environmental monitoring data includes actual temperature measurement data and humidity measurement data, and the environmental prediction data includes local temperature forecast data, rainfall forecast data, wind speed forecast data, and light forecast data.

[0075] In practical applications, the current temperature of the target lithium battery is known, and the detection data can be used to predict the heat exchange between the target lithium battery and the environment in the first time period in the future, and the prediction data can be used to predict the heat exchange between the target lithium battery and the environment in other time periods after the first time period in the future.

[0076] Specifically, since the temperature of the lithium battery is affected by external heat exchange and its own heat generation, its change pattern is relatively complex. Environmental monitoring data and environmental prediction data are obtained in order to analyze the heat exchange between the target lithium battery and the environment based on the current measured conditions and future predictions of the environment in which the target lithium battery is located, and then generate the environmental thermal change time relationship curve of the target lithium battery.

[0077] Wherein, in step S10, it includes:

[0078] S11: Obtain environmental monitoring data and environmental prediction data, and correct the environmental prediction data based on the environmental monitoring data.

[0079] In this embodiment, the environmental prediction data is derived from weather forecast data from an authoritative meteorological department.

[0080] Specifically, since the environmental prediction data derived from weather forecast data is usually used to describe the overall weather conditions in the area where the target lithium battery is located or the weather conditions at the location of the weather station, it cannot accurately describe the weather conditions at the location of the target lithium battery; therefore, the future temperature forecast data is corrected based on the deviation rate of the actual temperature data in the current environmental monitoring data relative to the temperature forecast data at the current time node in the latest environmental prediction data; the environmental prediction data is corrected through the measured environmental monitoring data to improve the reliability of the environmental prediction data.

[0081] In practical applications, the environmental prediction data can also be corrected by taking the average of the ratios of environmental detection data and environmental prediction data at multiple random historical time points as a correction factor. The method is as follows:

[0082] Calculate the sum of the ratios of environmental monitoring data and environmental forecast data at multiple historical time points;

[0083] averaging the sum of the ratios to obtain a correction factor;

[0084] The future environmental forecast data is corrected according to the correction factor to obtain the corrected environmental forecast data F cor (t)=α·f(t), where Fcor(t) is the corrected environmental prediction data, α is the correction factor, f(t) is the environmental prediction data before correction, and t is time.

[0085] S12: Obtain heat exchange calorific value between the target lithium battery and the environment during several temperature control cycles based on the environmental monitoring data and / or the corrected environmental prediction data.

[0086] Specifically, based on the corrected environmental prediction data and according to the existing heat transfer algorithm, the heat exchange between the target lithium battery and its environment in several temperature control cycles is calculated, thereby obtaining the heat exchange calorific value between the target lithium battery and the environment in each temperature control cycle.

[0087] In practical applications, regression algorithms can also be used to fit the relationship between heat transfer efficiency and various factors to obtain the heat exchange calorie value between the target lithium battery and the environment during each temperature control cycle.

[0088] S13: Record the initial calorific value of the target lithium battery, the start and end time nodes of each temperature control cycle, and the ambient heat exchange calorific value, and generate an ambient heat change time relationship curve.

[0089] In this embodiment, the environmental heat exchange calorific value refers to the heat exchange calorific value between the target lithium battery and its environment within a temperature control cycle.

[0090] Specifically, the temperature value of the target lithium battery at the starting time node of the temperature control cycle is obtained, and the corresponding initial heat value is calculated in combination with the specific heat capacity data of the target lithium battery; the initial heat value of the target lithium battery, the start and end time nodes of each temperature control cycle, and the heat exchange heat value between the target lithium battery and its environment in each temperature control cycle are recorded, and then an environmental heat change time relationship curve is generated to understand the change in heat over time caused by the target lithium battery being affected by its environment.

[0091] In actual applications, the initial calorific value is calculated based on the temperature value of the initial time node and the specific heat capacity data of the target lithium battery. Whether it is evaluation data or measured data depends on the temperature value of the corresponding starting time node. For example, when a temperature control cycle starts, the measured temperature value data can be obtained, and the initial calorific value is calculated based on the measured temperature value; but for future temperature control cycles, the corresponding initial calorific value can only be calculated based on the temperature prediction data.

[0092] S20: Acquire historical operating condition characteristic information of the target lithium battery to predict the operating heat generation of the target lithium battery and generate a time relationship curve of the operating heat change of the target lithium battery.

[0093] Specifically, historical operating condition information of the target lithium battery is obtained to analyze the historical working conditions of the target lithium battery, and then the working heat generation of the target lithium battery is predicted, thereby generating a working heat change time relationship curve of the target lithium battery.

[0094] Wherein, in step S20, it includes:

[0095] S21: Obtain historical operating condition characteristic information of the target lithium battery, and determine the charging power-time curve, the discharging power-time curve, and the battery performance parameters of the target lithium battery.

[0096] In this embodiment, the historical operating condition characteristic information includes the charging power-time curve and the discharging power-time curve of the target lithium battery; the battery performance parameters refer to the parameters used to record the relationship between charging, discharging power and heat generation power, including the relationship data between the charging power and the heat generation power when the battery is at multiple state of charge levels, and the relationship data between the discharge power and the heat generation power when the battery is at multiple state of charge levels.

[0097] Specifically, historical operating condition characteristic information of the target lithium battery is obtained to determine the historical charging power-time curve and discharging power-time curve of the target lithium battery and battery performance parameters for recording the relationship between charging and discharging power and heat generation power.

[0098] S22: Based on the charging power-time curve, the discharging power-time curve, and the battery performance parameters of the target lithium battery, a working thermal change time relationship curve of the target lithium battery is generated.

[0099] Specifically, based on the charging power-time curve, discharging power-time curve and battery performance parameters of the target lithium battery, the working heat generation of the target lithium battery is evaluated, and then the working heat change time relationship curve of the target lithium battery is generated, thereby achieving the effect of predicting the future working heat generation of the target lithium battery.

[0100] S30: Based on the ambient heat change time relationship curve and the working heat change time relationship curve, a comprehensive heat change time relationship curve is generated. Based on the comprehensive heat change time relationship curve and the preset warning heat value, the periodic heat change value and the critical temperature control cycle of several future temperature control cycles are determined.

[0101] In this embodiment, the temperature control cycle refers to a cycle set for the convenience of analyzing the temperature change of the lithium battery and controlling the temperature of the lithium battery. Preferably, a temperature control cycle is half an hour; the cycle thermal change value refers to the heat change value within the corresponding temperature control cycle; the critical temperature control cycle refers to the temperature control cycle in which the heat of the target lithium battery reaches the warning thermal value; the comprehensive thermal change time relationship curve is generated by superimposing the thermal data of the ambient thermal change time relationship curve and the working thermal change time relationship curve after time alignment processing.

[0102] Specifically, combining the environmental heat change time relationship curve and the working heat change time relationship curve, determine the comprehensive heat change time relationship curve after combining the environmental heat conduction and the lithium battery working heat generation factors. Based on the comprehensive heat change time relationship curve and the warning heat value, determine the periodic heat change values ​​in several future temperature control cycles, as well as the critical temperature control cycle in which the heat of the target lithium battery reaches the warning heat value.

[0103] S40: When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to a temperature control device corresponding to the target lithium battery.

[0104] Specifically, when the next temperature control cycle is a critical temperature control cycle or the cyclic thermal change value of the next temperature control cycle is greater than the thermal change threshold, a temperature control execution instruction is generated, thereby adjusting the temperature of the target lithium battery according to the prediction of the environment and the working state of the target lithium battery. At the same time, on the basis of setting the upper and lower limit thresholds of temperature adjustment in the conventional temperature control method, a scheme for adjusting the target lithium battery temperature when the lithium battery temperature changes suddenly is added, thereby reducing the possibility of lithium battery damage or safety accidents caused by sudden changes in lithium battery temperature, and improving the response speed of temperature control of the lithium battery; sudden changes in lithium battery temperature refer to situations where the cyclic thermal change value is greater than the thermal change threshold.

[0105] In some feasible solutions, step S40 includes:

[0106] S41: When the next temperature control cycle is a critical temperature control cycle, calculate a first battery temperature target value; the calculation formula of the first battery temperature target value is:

[0107] T g1 =Δ0+k1Δ1+k2Δ2;

[0108] In this embodiment, the temperature control execution instruction includes a first battery temperature target value; wherein k1 is the first coefficient, k2 is the second coefficient, Δ0 is the standard temperature difference parameter, preferably, the standard temperature difference parameter is 3°C, Δ1 is the ambient temperature difference parameter, and Δ2 is the operating temperature difference parameter.

[0109] The calculation formula of the ambient temperature difference parameter is:

[0110]

[0111] The calculation formula for the working temperature difference parameter is:

[0112]

[0113] T I is the indoor temperature of the current temperature control cycle, T Oi is the outdoor temperature of the current or future temperature control cycle, where indoor and outdoor can also refer to the inside and outside of the battery compartment; i is the temperature control cycle number, the current temperature control cycle number is 1, and j is the number of sampled temperature control cycles; Q i The heat generated by the target lithium battery for the current or future temperature control cycle, is the average specific heat capacity of the target lithium battery.

[0114] Specifically, the temperature control execution instruction includes a method for determining a first battery temperature target value for the target lithium battery temperature control target. When the next temperature control cycle is a critical temperature control cycle, the first battery temperature target value is calculated, wherein the first battery temperature target value is obtained by weighted summation of a standard temperature difference parameter, an ambient temperature difference parameter and an operating temperature difference parameter. The standard temperature difference parameter is used to determine the first battery temperature target value without considering the ambient temperature difference and the heat dissipation of the lithium battery. The ambient temperature difference parameter and the operating temperature difference parameter are used to determine the impact of the ambient temperature difference and the heat dissipation of the lithium battery on the target lithium battery temperature. The ambient temperature difference parameter takes into account the impact of the temperature difference between the indoor temperature and the average outdoor temperature in the future period of time, and the operating temperature difference parameter takes into account the impact of the target lithium battery's heat generation in the future period of time.

[0115] S42: Generate a temperature control execution instruction based on the first battery temperature target value and send the instruction to a temperature control device corresponding to the target lithium battery.

[0116] Specifically, a temperature control execution instruction is generated according to the first battery temperature target value and sent to the temperature control device to control the temperature of the target lithium battery.

[0117] In some feasible solutions, step S40 includes:

[0118] S43: When the thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a second battery temperature target value is calculated; the calculation formula of the second battery temperature target value is:

[0119]

[0120] In this embodiment, the temperature control execution instruction includes a second battery temperature target value; wherein Q2 is a periodic thermal variation value of the next temperature control cycle.

[0121] Specifically, the temperature control execution instruction includes a second battery temperature target value. When the cyclic thermal change value of the next temperature control cycle is greater than the thermal change threshold, the second battery temperature target value is calculated, wherein the second battery temperature target value is proportional to the cyclic thermal change value of the target lithium battery in the next temperature control cycle.

[0122] S44: Generate a temperature control execution instruction based on the second battery temperature target value and send the instruction to the temperature control device corresponding to the target lithium battery.

[0123] Specifically, a temperature control execution instruction is generated according to the second battery temperature target value and sent to the temperature control device to control the temperature of the target lithium battery.

[0124] It should be understood that the serial numbers of the steps in the above embodiments do not imply the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0125] Example 2

[0126] A lithium battery temperature control strategy adjustment system based on environmental monitoring is provided. The lithium battery temperature control strategy adjustment system based on environmental monitoring corresponds to the lithium battery temperature control strategy adjustment method based on environmental monitoring in the above embodiment.

[0127] like Figure 2 As shown in the figure, the lithium battery temperature control strategy adjustment system based on environmental monitoring includes an environmental thermal change analysis module, an operating thermal change analysis module, a comprehensive thermal change analysis module, and a temperature control execution module. The detailed description of each functional module is as follows:

[0128] Environmental thermal change analysis module, used to obtain environmental monitoring data and environmental prediction data to evaluate the heat exchange between the target lithium battery and the environment, and generate the environmental thermal change time relationship curve of the target lithium battery;

[0129] The working heat variation analysis module is used to obtain the historical operating condition characteristic information of the target lithium battery to predict the working heat generation of the target lithium battery and generate the working heat variation time relationship curve of the target lithium battery;

[0130] The comprehensive thermal change analysis module is used to generate a comprehensive thermal change time relationship curve based on the environmental thermal change time relationship curve and the working thermal change time relationship curve, and determine the periodic thermal change values ​​and critical temperature control cycles of several future temperature control cycles based on the comprehensive thermal change time relationship curve and the preset early warning thermal value;

[0131] The temperature control execution module is used to generate a temperature control execution instruction and send it to the temperature control device corresponding to the target lithium battery when the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold.

[0132] Among them, the environmental thermal change analysis module also includes:

[0133] An environmental prediction data correction submodule is used to obtain environmental monitoring data and environmental prediction data, and to correct the environmental prediction data based on the environmental monitoring data;

[0134] The environmental heat exchange evaluation submodule is used to evaluate the heat exchange between the target lithium battery and the environment in several future temperature control cycles based on the revised environmental prediction data;

[0135] The environmental heat change time relationship curve generation submodule is used to record the initial heat value of the target lithium battery, the start and end time nodes of each temperature control cycle and the environmental heat exchange heat value, and generate the environmental heat change time relationship curve.

[0136] Among them, the working heat change analysis module also includes:

[0137] The historical operating condition characteristic information analysis submodule is used to obtain the historical operating condition characteristic information of the target lithium battery and determine the charging power-time curve, discharge power-time curve and battery performance parameters of the target lithium battery;

[0138] The working thermal variation time relationship curve generation submodule is used to generate the working thermal variation time relationship curve of the target lithium battery based on the charging power-time curve, the discharging power-time curve and the battery performance parameters of the target lithium battery.

[0139] Among them, the temperature control execution module also includes:

[0140] A first battery temperature target value calculation submodule, configured to calculate a first battery temperature target value when the next temperature control cycle is a critical temperature control cycle;

[0141] The first battery temperature target value execution submodule is used to generate a temperature control execution instruction based on the first battery temperature target value and send the instruction to the temperature control device corresponding to the target lithium battery.

[0142] A second battery temperature target value calculation submodule, configured to calculate a second battery temperature target value when the periodic thermal variation value of the next temperature control period is greater than a preset thermal variation threshold;

[0143] The second battery temperature target value execution submodule is used to generate a temperature control execution instruction based on the second battery temperature target value and send it to the temperature control device corresponding to the target lithium battery.

[0144] For the specific limitations of the lithium battery temperature control strategy adjustment system based on environmental monitoring, please refer to the limitations of the lithium battery temperature control strategy adjustment method based on environmental monitoring above, which will not be repeated here; the various modules in the above-mentioned lithium battery temperature control strategy adjustment system based on environmental monitoring can be implemented in whole or in part through software, hardware and their combination; the above-mentioned modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the corresponding operations of the above modules.

[0145] Example 3

[0146] A computer device, which may be a server, may have an internal structure as shown in FIG. Figure 3As shown. The computer device includes a processor, a memory, a network interface and a database connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data such as environmental monitoring data, environmental prediction data, environmental thermal change time relationship curves, historical operating condition characteristic information, working thermal change time relationship curves, comprehensive thermal change time relationship curves, warning thermal values, periodic thermal change values, critical temperature control cycles, thermal change thresholds and temperature control execution instructions. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a lithium battery temperature control strategy adjustment method based on environmental monitoring is implemented.

[0147] In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following steps are performed:

[0148] S10: Acquire environmental monitoring data and environmental prediction data to evaluate the heat exchange between the target lithium battery and the environment, and generate an environmental thermal change time relationship curve of the target lithium battery;

[0149] S20: Acquire historical operating condition characteristic information of the target lithium battery to predict the operating heat generation of the target lithium battery and generate a time relationship curve of the operating heat change of the target lithium battery;

[0150] S30: generating a comprehensive thermal change time relationship curve based on the ambient thermal change time relationship curve and the working thermal change time relationship curve, and determining the periodic thermal change values ​​and critical temperature control cycles of several future temperature control cycles based on the comprehensive thermal change time relationship curve and the preset warning thermal value;

[0151] S40: When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to a temperature control device corresponding to the target lithium battery.

[0152] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0153] S10: Acquire environmental monitoring data and environmental prediction data to evaluate the heat exchange between the target lithium battery and the environment, and generate an environmental thermal change time relationship curve of the target lithium battery;

[0154] S20: Acquire historical operating condition characteristic information of the target lithium battery to predict the operating heat generation of the target lithium battery and generate a time relationship curve of the operating heat change of the target lithium battery;

[0155] S30: generating a comprehensive thermal change time relationship curve based on the ambient thermal change time relationship curve and the working thermal change time relationship curve, and determining the periodic thermal change values ​​and critical temperature control cycles of several future temperature control cycles based on the comprehensive thermal change time relationship curve and the preset warning thermal value;

[0156] S40: When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to a temperature control device corresponding to the target lithium battery.

[0157] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink), DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0158] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0159] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some of the features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A lithium battery temperature control strategy adjustment method based on environmental monitoring, characterized in that: include: Acquire environmental monitoring data and environmental prediction data to evaluate the heat exchange between the target lithium battery and the environment, and generate a time-dependent curve of the environmental thermal change of the target lithium battery; Obtain historical operating condition characteristic information of the target lithium battery to predict the operating heat generation of the target lithium battery and generate a time relationship curve of the operating heat change of the target lithium battery; Based on the environmental heat change time relationship curve and the working heat change time relationship curve, a comprehensive heat change time relationship curve is generated. Based on the comprehensive heat change time relationship curve and the preset warning heat value, the periodic heat change value and the critical temperature control cycle of several future temperature control cycles are determined; When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to the temperature control device corresponding to the target lithium battery; The environmental monitoring data includes measured temperature data and measured humidity data; the environmental prediction data includes local temperature forecast data, rainfall forecast data, wind speed forecast data, and sunlight forecast data; the periodic thermal variation value refers to the thermal variation value within the corresponding temperature control period; the critical temperature control period refers to the temperature control period in which the target lithium battery heat reaches the warning thermal value; and the temperature control execution instruction includes the first battery temperature target value; When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to the temperature control device corresponding to the target lithium battery, including: When the next temperature control cycle is a critical temperature control cycle, a first battery temperature target value is calculated; the calculation formula for the first battery temperature target value is: T g1 =Δ0+k1Δ1+k2Δ2; Generate a temperature control execution instruction based on the first battery temperature target value and send it to the temperature control device corresponding to the target lithium battery; Wherein, k1 is the first coefficient, k2 is the second coefficient, Δ0 is the standard temperature difference parameter, Δ1 is the ambient temperature difference parameter, and Δ2 is the working temperature difference parameter; The calculation formula of the ambient temperature difference parameter is: The calculation formula of the working temperature difference parameter is: T I is the indoor temperature of the current temperature control cycle, T Oi is the outdoor temperature of the current or future temperature control cycle, i is the temperature control cycle number, the current temperature control cycle number is 1, and j is the number of sampled temperature control cycles; Q i The heat generated by the target lithium battery for the current or future temperature control cycle, is the average specific heat capacity of the target lithium battery; Wherein, the temperature control execution instruction includes a second battery temperature target value; When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to the temperature control device corresponding to the target lithium battery, including: When the periodic thermal change value of the next temperature control cycle is greater than the preset thermal change threshold, a second battery temperature target value is calculated; the calculation formula of the second battery temperature target value is: Generate a temperature control execution instruction based on the second battery temperature target value and send it to the temperature control device corresponding to the target lithium battery; Among them, Q2 is the periodic thermal change value of the next temperature control cycle.

2. The method for adjusting the lithium battery temperature control strategy based on environmental monitoring according to claim 1, characterized in that: The environmental monitoring data and environmental prediction data are obtained to evaluate the heat exchange between the target lithium battery and the environment, and to generate an environmental thermal change time relationship curve of the target lithium battery, including: Obtain environmental monitoring data and environmental prediction data, and revise environmental prediction data based on the environmental monitoring data; Evaluate the heat exchange between the target lithium battery and the environment during several future temperature control cycles based on the revised environmental prediction data; Record the initial calorific value of the target lithium battery, the start and end time nodes of each temperature control cycle, and the ambient heat exchange calorific value, and generate an ambient heat change time relationship curve; The environmental heat exchange calorific value refers to the heat exchange calorific value between the target lithium battery and its environment within a temperature control cycle.

3. The method for adjusting the lithium battery temperature control strategy based on environmental monitoring according to claim 1, characterized in that: The historical operating condition characteristic information includes a charging power-time curve and a discharging power-time curve of the target lithium battery; The acquiring of historical operating condition characteristic information of the target lithium battery to predict the operating heat generation of the target lithium battery and generate a time relationship curve of the operating heat change of the target lithium battery includes: Obtain historical operating condition characteristic information of the target lithium battery, and determine the charging power-time curve, discharging power-time curve and battery performance parameters of the target lithium battery; Based on the charging power-time curve, the discharging power-time curve and the battery performance parameters of the target lithium battery, a working thermal change time relationship curve of the target lithium battery is generated.

4. A lithium battery temperature control strategy adjustment system based on environmental monitoring, characterized in that: The method for adjusting the temperature control strategy of a lithium battery based on environmental monitoring, as applied to any one of claims 1 to 3, comprises: Environmental thermal change analysis module, used to obtain environmental monitoring data and environmental prediction data to evaluate the heat exchange between the target lithium battery and the environment, and generate the environmental thermal change time relationship curve of the target lithium battery; The working heat variation analysis module is used to obtain the historical operating condition characteristic information of the target lithium battery to predict the working heat generation of the target lithium battery and generate the working heat variation time relationship curve of the target lithium battery; The comprehensive thermal change analysis module is used to generate a comprehensive thermal change time relationship curve based on the environmental thermal change time relationship curve and the working thermal change time relationship curve, and determine the periodic thermal change values ​​and critical temperature control cycles of several future temperature control cycles based on the comprehensive thermal change time relationship curve and the preset early warning thermal value; A temperature control execution module is used to generate a temperature control execution instruction and send it to the temperature control device corresponding to the target lithium battery when the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold; The environmental monitoring data includes measured temperature data and measured humidity data; the environmental prediction data includes local temperature forecast data, rainfall forecast data, wind speed forecast data, and light forecast data; the periodic thermal change value refers to the thermal change value within the corresponding temperature control cycle; the critical temperature control cycle refers to the temperature control cycle in which the heat of the target lithium battery reaches the warning thermal value; Wherein, the temperature control execution instruction includes a first battery temperature target value; When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to the temperature control device corresponding to the target lithium battery, including: When the next temperature control cycle is a critical temperature control cycle, a first battery temperature target value is calculated; the calculation formula for the first battery temperature target value is: T g1 =Δ0+k1Δ1+k2Δ2 Generate a temperature control execution instruction based on the first battery temperature target value and send it to the temperature control device corresponding to the target lithium battery; Wherein, k1 is the first coefficient, k2 is the second coefficient, Δ0 is the standard temperature difference parameter, Δ1 is the ambient temperature difference parameter, and Δ2 is the working temperature difference parameter; The calculation formula of the ambient temperature difference parameter is: The calculation formula of the working temperature difference parameter is: T I is the indoor temperature of the current temperature control cycle, T Oi is the outdoor temperature of the current or future temperature control cycle, i is the temperature control cycle number, the current temperature control cycle number is 1, and j is the number of sampled temperature control cycles; Q i The heat generated by the target lithium battery for the current or future temperature control cycle, is the average specific heat capacity of the target lithium battery; Wherein, the temperature control execution instruction includes a second battery temperature target value; When the next temperature control cycle is a critical temperature control cycle or the cycle thermal change value of the next temperature control cycle is greater than a preset thermal change threshold, a temperature control execution instruction is generated and sent to the temperature control device corresponding to the target lithium battery, including: When the periodic thermal change value of the next temperature control cycle is greater than the preset thermal change threshold, a second battery temperature target value is calculated; the calculation formula of the second battery temperature target value is: Generate a temperature control execution instruction based on the second battery temperature target value and send it to the temperature control device corresponding to the target lithium battery; Among them, Q2 is the periodic thermal change value of the next temperature control cycle.

5. The lithium battery temperature control strategy adjustment system based on environmental monitoring according to claim 4, characterized in that: The environmental thermal change analysis module includes: An environmental prediction data correction submodule is used to obtain environmental monitoring data and environmental prediction data, and to correct the environmental prediction data based on the environmental monitoring data; The environmental heat exchange evaluation submodule is used to evaluate the heat exchange between the target lithium battery and the environment in several future temperature control cycles based on the revised environmental prediction data; The submodule for generating the time relationship curve of the environmental thermal change is used to record the initial heat value of the target lithium battery, the start and end time nodes of each temperature control cycle, and the environmental heat exchange heat value, and generate the time relationship curve of the environmental thermal change; The environmental heat exchange calorific value refers to the heat exchange calorific value between the target lithium battery and its environment within a temperature control cycle.

6. The lithium battery temperature control strategy adjustment system based on environmental monitoring according to claim 4, characterized in that: The working heat change analysis module includes: The historical operating condition characteristic information analysis submodule is used to obtain the historical operating condition characteristic information of the target lithium battery and determine the charging power-time curve, discharge power-time curve and battery performance parameters of the target lithium battery; A working thermal variation time relationship curve generation submodule is used to generate a working thermal variation time relationship curve of a target lithium battery based on the charging power-time curve, the discharging power-time curve and the battery performance parameters of the target lithium battery; The historical operating condition characteristic information includes a charging power-time curve and a discharging power-time curve of the target lithium battery.

7. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the lithium battery temperature control strategy adjustment method based on environmental monitoring are implemented as described in any one of claims 1 to 3.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the lithium battery temperature control strategy adjustment method based on environmental monitoring as described in any one of claims 1 to 3 are implemented.

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