Simulation calibration method, device, equipment and product of battery thermal management strategy

Abstract

The invention provides a simulation calibration method, device, equipment and product for a battery thermal management strategy, and the method comprises the steps: obtaining part simulation models corresponding to a plurality of parts of a battery thermal management system; acquiring a battery thermal management system simulation model according to the component simulation model; and performing simulation calibration of a battery thermal management strategy according to the battery thermal management system simulation model, and determining the battery thermal management strategy. According to the component simulation models corresponding to the plurality of components of the battery thermal management system, the battery thermal management system simulation model is obtained to perform simulation calibration of the battery thermal management strategy, the battery thermal management strategy is determined, thermal management strategy calibration can be realized through a user-defined strategy jump model, and operation is more convenient. Mathematical simplification, remodeling and packaging are carried out on the components by adopting the component simulation model, so that the universality of the model is enhanced, the simulation calculation amount is greatly reduced, the simulation calibration efficiency is improved, and the development speed is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle batteries, and particularly to a simulation calibration method, device, equipment and product for a battery thermal management strategy. Background Art

[0002] Temperature has an important impact on the operation of batteries. In order to better exert the performance of batteries and reduce the energy consumption of their thermal management, the thermal management strategy of batteries is developing towards refined control. For example, the fast charging strategy has evolved from a single fixed strategy to the current one that executes different battery thermal management strategies according to different battery temperatures, different ambient temperatures, and different charging pile capabilities. Currently, the mainstream approach in the industry to formulate such complex strategies is to invest a large amount of test resources and a cycle of several months to calibrate and adjust the strategy thresholds under different working conditions. At present, there are also a few who conduct relevant work through simulation tests. However, due to the complexity of the vehicle and battery systems, multiple software need to be jointly modeled, resulting in a large workload. At the same time, a multi-physical field coupling simulation model needs to be established, with a large amount of calculation and low simulation efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a simulation calibration method, device, equipment and product for a battery thermal management strategy, which is used to solve the problems in the prior art that when formulating a battery thermal management strategy through simulation tests, due to the complexity of the vehicle and battery systems, multiple software need to be jointly modeled, resulting in a large workload, a large amount of calculation, and low simulation efficiency.

[0004] To achieve the above purpose, an embodiment of the present invention provides a simulation calibration method for a battery thermal management strategy, which includes:

[0005] Obtain component simulation models corresponding to multiple components of the battery thermal management system;

[0006] Obtain a battery thermal management system simulation model according to the component simulation models; wherein, the battery thermal management system simulation model includes multiple subsystem simulation models, and the subsystem simulation models include multiple of the component simulation models;

[0007] Perform simulation calibration of the battery thermal management strategy according to the battery thermal management system simulation model to determine the battery thermal management strategy.

[0008] Optionally, in the method, the obtaining of the battery thermal management system simulation model according to the component simulation models includes:

[0009] Connect a first interface between multiple of the component simulation models according to subsystem principles to obtain the subsystem simulation model;

[0010] Connect the second interfaces between the multiple subsystem simulation models according to the principle of the battery thermal management system to obtain the battery thermal management system simulation model.

[0011] Optionally, in the method, the simulating and calibrating the battery thermal management strategy according to the battery thermal management system simulation model to determine the battery thermal management strategy includes:

[0012] Obtain a calibrated and corrected simulation model according to the battery thermal management system simulation model;

[0013] Perform simulation calculations according to the calibrated and corrected simulation model to obtain calculation results;

[0014] When the calculation result is within a preset interval, determine the battery thermal management strategy; wherein, the preset interval is set according to the target value that can achieve the calibration of the battery thermal management strategy.

[0015] Optionally, in the method, the obtaining a calibrated and corrected simulation model according to the battery thermal management system simulation model includes:

[0016] Obtain the first test results of the benchmark working condition test of the battery thermal management system at different temperatures;

[0017] Obtain the simulation results of the battery thermal management system simulation model;

[0018] According to the first test results and the simulation results, correct the boundary parameters of the battery thermal management system simulation model at different temperatures to obtain the calibrated and corrected simulation model.

[0019] Optionally, in the method, before obtaining the component simulation models corresponding to the multiple components of the battery thermal management system, the method further includes:

[0020] Establish a custom component simulation model according to the component;

[0021] Obtain the calibration parameters corresponding to the custom component simulation model according to the second test results; wherein, the second test results are the test results of the bench test of the component corresponding to the custom component simulation model;

[0022] Obtain a parameter matrix according to the calibration parameters;

[0023] Correct the custom component simulation model according to the parameter matrix to obtain the component simulation model.

[0024] Optionally, in the method, the subsystem simulation model includes one or more of the following:

[0025] Battery charging subsystem simulation model;

[0026] Battery pack thermal management subsystem simulation model;

[0027] Vehicle battery heating subsystem simulation model;

[0028] Vehicle battery cooling subsystem simulation model.

[0029] Optionally, in the method, when the subsystem simulation model includes a battery charging subsystem simulation model, the component simulation model includes one or more of the following:

[0030] Battery state of charge calculation module simulation model; wherein, the first interface between multiple component simulation models includes an input interface for the real-time charging current value and an output interface for the real-time state of charge calculation value;

[0031] Battery charging current calculation module simulation model; wherein, the first interface includes an input interface for the real-time battery temperature value, an input interface for the real-time state of charge calculation value, and an output interface for the real-time charging current value.

[0032] Optionally, in the method, when the subsystem simulation model includes a battery pack thermal management subsystem simulation model, the component simulation model includes one or more of the following:

[0033] Battery thermal characteristics simulation model; wherein, the first interface between multiple component simulation models includes a cold plate-battery heat exchange interface, an input interface for the real-time battery heat generation power value, and an output interface for the real-time battery temperature value;

[0034] Battery cold plate flow channel module simulation model; wherein, the first interface includes a battery-cold plate heat exchange interface, an input interface for the cold plate inlet flow rate, an input interface for the cold plate inlet temperature, and an output interface for the cold plate outlet temperature;

[0035] Battery heat generation calculation simulation model; wherein, the first interface includes an input interface for the real-time state of charge value, an input interface for the real-time charging current value, an input interface for the real-time battery temperature value, and an output interface for the real-time battery heat generation power value;

[0036] Battery thermal management strategy calibration simulation model; wherein, the first interface includes an input interface for the maximum battery temperature, an input interface for the minimum battery temperature, an input interface for the charging current, an output interface for the large current strategy required flow rate value, an output interface for the small current strategy required flow rate value, an output interface for the switching strategy required flow rate output, and an output interface for the switching strategy required water temperature output.

[0037] Optionally, in the method, when the subsystem simulation model includes a vehicle battery heating subsystem simulation model and a vehicle battery cooling subsystem simulation model, the component simulation model includes:

[0038] A vehicle battery thermal management water temperature simulation model; wherein, the first interfaces between multiple component simulation models include an input interface for the outlet water temperature signal, an input interface for comparing heating and cooling flows under high current, an input interface for comparing heating and cooling flows under low current, an output interface for the thermal management water temperature under high current, and an output interface for the thermal management water temperature under low current.

[0039] To achieve the above object, an embodiment of the present invention further provides a simulation calibration device for a battery thermal management strategy, which includes:

[0040] A first acquisition module, configured to acquire component simulation models corresponding to multiple components of a battery thermal management system;

[0041] A second acquisition module, configured to acquire a battery thermal management system simulation model according to the component simulation models; wherein, the battery thermal management system simulation model includes multiple subsystem simulation models, and the subsystem simulation models include multiple component simulation models;

[0042] A first determination module, configured to perform simulation calibration of a battery thermal management strategy according to the battery thermal management system simulation model and determine the battery thermal management strategy.

[0043] To achieve the above object, an embodiment of the present invention further provides an electronic device, including: a processor, a memory, and a program or instruction stored on the memory and executable on the processor; wherein, when the processor executes the program or instruction, the simulation calibration method of the battery thermal management strategy as described above is implemented.

[0044] To achieve the above object, an embodiment of the present invention further provides a readable storage medium, on which a program or instruction is stored, wherein, when the program or instruction is executed by a processor, the steps in the simulation calibration method of the battery thermal management strategy as described above are implemented.

[0045] To achieve the above object, an embodiment of the present invention further provides a computer program product, which includes computer instructions, and when the computer instructions are executed by a processor, the steps of the simulation calibration method of the battery thermal management strategy as described above are implemented.

[0046] The beneficial effects of the above technical solutions of the present invention are as follows:

[0047] In the embodiment of the present invention, a battery thermal management system simulation model is obtained according to component simulation models corresponding to multiple components of the battery thermal management system for simulation calibration of the battery thermal management strategy, and the battery thermal management strategy is determined. The thermal management strategy calibration can be realized through a custom strategy jump model, and the operation is more convenient. By using the component simulation model to simplify the mathematics of the component, re-model and package, the versatility of the model is enhanced. At the same time, there is no need to calculate the electro-thermal effect of the system and the heat transfer of the refrigerant phase change, which greatly reduces the simulation calculation amount, improves the simulation calibration efficiency, and speeds up the development speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0049] Figure 2 It is a diagram of the division of the component simulation model of the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0050] Figure 3 It is a schematic diagram of the battery thermal management system simulation model of the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0051] Figure 4 It is a simulation modeling diagram of the calibration of the whole vehicle battery fast charging thermal management strategy of the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0052] Figure 5 It is a schematic diagram of the cooling strategy parameters of the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0053] Figure 6 It is a schematic diagram of the heating strategy parameters of the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0054] Figure 7 It is a simulation model for the calibration of the battery thermal management strategy and the calculation of the water temperature and flow rate of the whole vehicle battery thermal management in the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0055] Figure 8 It is one of the result display diagrams of the simulation result and the whole vehicle test of the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0056] Figure 9 It is another result display diagram of the simulation result and the whole vehicle test of the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0057] Figure 10 It is the third result display diagram of the simulation result and the whole vehicle test of the simulation calibration method for the battery thermal management strategy described in the embodiment of the present invention;

[0058] Figure 11 This is the fourth figure showing the simulation results of the simulation calibration method for the battery thermal management strategy described in the embodiments of the present invention and the results of vehicle tests;

[0059] Figure 12 This is a schematic diagram of the simulation calibration device for the battery thermal management strategy described in the embodiments of the present invention. Detailed implementation manners

[0060] To make the technical problems, technical solutions, and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0061] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0062] In various embodiments of the present invention, it should be understood that the magnitudes of the serial numbers of the following processes do not mean the order of execution is prior or subsequent. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0063] In addition, the terms "system" and "network" are often used interchangeably in this article.

[0064] In the embodiments provided in the present application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0065] For the convenience of understanding, the following explains some contents related to the embodiments of the present invention:

[0066] As Figure 1 shown, a simulation calibration method for a battery thermal management strategy according to an embodiment of the present invention includes:

[0067] S10. Obtain component simulation models corresponding to multiple components of the battery thermal management system;

[0068] It should be noted that according to the working process of the battery thermal management system, the components related to battery thermal management are extracted. During the process, according to different functions, the battery thermal management system is gradually decomposed into subsystems and components. After simplifying and reorganizing the models corresponding to the components, the component simulation models are built and set up in the simulation software.

[0069] S20. Obtain the battery thermal management system simulation model according to the component simulation models; wherein, the battery thermal management system simulation model includes multiple subsystem simulation models, and the subsystem simulation models include multiple of the component simulation models;

[0070] It should be noted that the subsystem simulation models are composed of connecting the component simulation models, and the battery thermal management system simulation model is composed of connecting the subsystem simulation models.

[0071] S30. Perform simulation calibration of the battery thermal management strategy according to the battery thermal management system simulation model, and determine the battery thermal management strategy;

[0072] It should be noted that the battery thermal management system simulation model is set with a calibration target for simulation calibration to determine the battery thermal management strategy that meets the set target.

[0073] In this embodiment, the battery thermal management system simulation model is obtained according to the component simulation models corresponding to the multiple components of the battery thermal management system, and the simulation calibration of the battery thermal management strategy is performed to determine the battery thermal management strategy. It can realize the calibration of the thermal management strategy through the custom strategy jump model, and the operation is more convenient. By using the component simulation model to perform mathematical simplification, re-modeling and encapsulation of the components, the versatility of the model is enhanced. At the same time, there is no need to calculate the electro-thermal effect of the system and the phase change heat of the refrigerant, which greatly reduces the simulation calculation amount, improves the simulation calibration efficiency, and improves the development speed. As Figure 2 shown, an example is provided now. The multiple subsystem simulation models of the battery thermal management system simulation model and multiple of the component simulation models are decomposed according to Figure 2 The component simulation models are stored in a general-purpose component simulation model library. When performing the battery thermal management strategy later, the component simulation models corresponding to the components to be used are extracted from it, and after connection and setting, the system simulation model corresponding to the battery thermal management strategy is formed.

[0074] Optionally, in the method, the step S20 includes:

[0075] Connect the first interfaces between multiple of the component simulation models according to the subsystem principle to obtain the subsystem simulation model;

[0076] Connect the second interfaces between the multiple subsystem simulation models according to the principle of the battery thermal management system to obtain the battery thermal management system simulation model.

[0077] In this embodiment, according to the subsystem principle, connect the first interfaces between the component simulation models, define the parameter transfer relationship between the components, and form the subsystem simulation model; then, according to the principle of the battery thermal management system, connect the second interfaces between the subsystem simulation models to form the battery thermal management system simulation model.

[0078] Such as Figure 3 and Figure 4 As shown, the embodiment of the present invention provides an example of a battery fast charging thermal management system simulation model. According to the working process and principle of the vehicle's battery fast charging thermal management, simplify and combine the Figure 2 component simulation models therein to obtain the battery fast charging thermal management system simulation model shown in Figure 3 . According to the state of charge (SoC) and charging current calculation method of a specific vehicle, establish a custom SoC (state of charge) calculation simulation model and a charging current calculation simulation model in the simulation software AMESim, and package them into the component simulation models. Figure 3 In it, the SoC calculation simulation model defines the charging current input interface and the output interface of the real-time SoC calculation value. Through the real-time charging current value, calculate the SoC value and output the real-time SoC value. The charging current calculation simulation model defines the real-time battery temperature input interface, the real-time SoC calculation value input interface, and the real-time charging current value output interface. Set the charging Map matrix of the battery in the charging model, and call the charging current in this state through the real-time battery temperature and the real-time SoC value, and output the real-time charging current value. Complete the construction of the battery charging subsystem simulation model, such as the SC_3 custom module shown in Figure 4 .

[0079] Next, according to the battery pack structure, a custom battery thermal characteristics simulation model and a battery heat generation calculation simulation model are respectively established in AMESim and encapsulated into the component simulation model. A battery heat generation matrix is set in the battery heat generation calculation simulation model, and a real-time SoC value input interface, a real-time charging current value input interface, a real-time battery temperature value input interface, and a real-time battery heat generation power value output interface are defined. The heat generation value of the battery at this moment is output through the real-time SoC, charging current, and temperature. The battery thermal characteristics simulation model includes battery cells, busbars, and copper bars, etc. Each battery cell is simplified as a whole, and the electrochemical model is simplified to improve the calculation speed. Battery thermal physical properties parameters are set in the model, and a battery-cooling plate heat exchange interface, a real-time battery heat generation input interface, and a real-time battery temperature output interface are defined. The real-time battery temperature value is calculated through the input real-time battery heat generation and the battery-cooling plate heat exchange, and the real-time battery temperature value is output. Connect the real-time battery heat generation power output interface of the battery heat generation calculation simulation model to the real-time battery heat generation input interface in the battery thermal characteristics simulation model, and customize it as Figure 4 the SC_4 battery thermal simulation model in

[0080] Complete the battery cooling plate flow channel simulation model in AMESim according to the battery pack cooling plate structure and encapsulate it into the component simulation model, such as Figure 4 the SC_5 custom module in. The coolant physical properties parameters used are set in the battery cooling plate flow channel simulation model, and a cooling plate-battery heat exchange interface, a cooling plate inlet flow rate input interface, a cooling plate inlet temperature input interface, and a cooling plate outlet temperature output interface are defined. The cooling plate outlet temperature is calculated through the heat exchange between the cooling plate and the battery, and the actual cooling plate outlet temperature value is output. Build a battery thermal management strategy calibration simulation model, define battery Tmax, battery Tmin, and charging current input interfaces, define a large current strategy required flow rate value output interface, a small current strategy required flow rate value output interface, a switching strategy required flow rate output interface, and a switching strategy required water temperature output interface, and customize it as Figure 4 SC_1 in. In the strategy requirement model, corresponding thermal management strategies are set according to the temperature range of the calibration working conditions. Build a vehicle-battery thermal management water temperature calculation model, define an outlet water temperature signal input interface, a large current heating and cooling flow rate comparison input interface, a small current heating and cooling flow rate comparison input interface, a large current thermal management water temperature output interface, and a small current thermal management water temperature output interface. And customize it as Figure 4 SC_2 in, and set vehicle thermal management parameters in the model. Connect each custom simulation module to complete Figure 4 the vehicle battery fast charging thermal management strategy calibration simulation modeling diagram shown in

[0081] Optionally, in the method described above, step S30 includes:

[0082] Obtain a calibrated and corrected simulation model based on the battery thermal management system simulation model;

[0083] Perform simulation calculations according to the calibrated and corrected simulation model to obtain calculation results;

[0084] When the calculation results are within a preset interval, determine the battery thermal management strategy; wherein, the preset interval is set according to the target value that can achieve the calibration of the battery thermal management strategy.

[0085] In this embodiment, the calibrated and corrected simulation model after calibration is used to set a calibration target (i.e., the target value), and the thermal management strategy calibration is carried out. By adjusting different battery thermal management strategies for simulation calculations, the calculation results are continuously close to the target value, so as to determine the preferred battery thermal management strategy that can meet the requirements under different environmental conditions. Finally, a vehicle test is carried out to determine that the actual performance of the strategy also meets the set target.

[0086] Optionally, for the method, wherein obtaining the calibrated and corrected simulation model according to the battery thermal management system simulation model includes:

[0087] Obtain the first test results of the benchmark working condition test of the battery thermal management system at different temperatures;

[0088] Obtain the simulation results of the battery thermal management system simulation model;

[0089] According to the first test results and the simulation results, correct the boundary parameters of the battery thermal management system simulation model at different temperatures to obtain the calibrated and corrected simulation model.

[0090] In this embodiment, the benchmark working condition test of the battery thermal management system at different temperatures is carried out, and the simulation analysis of the established battery thermal management system simulation model is carried out. According to the difference between the first test results and the simulation results, the boundary parameters of the battery thermal management simulation model at different temperatures are corrected, so as to determine the accuracy of the simulation model.

[0091] It should be noted that taking the determination of the battery fast charging thermal management strategy as an example, the thresholds of the battery fast charging thermal management strategy in different ambient temperature ranges are different. In Table 1, taking the battery fast charging thermal management strategy in one of the temperature ranges as an example, in this temperature environment of the battery, the turning on of heating and cooling changes with the charging current.

[0092] Table 1

[0093]

[0094]

[0095] Therefore, a strategy calibration module needs to be established to achieve real-time strategy jump. For example, when the current ambient temperature is 10°C, the battery starts charging at the initial maximum and minimum temperature of 10°C, and the charging current is less than 150A. The corresponding heating strategy is executed. As the battery temperature rises and the charging current ≥ 150A, if Tmin > 15°C at this time, the strategy jumps to ≥ 150A, and the heating condition is not met, so the heating stops; if Tmin ≤ 15°C at this time, the strategy jumps to ≥ 150A, the heating condition is met, and the heating continues until Tmin ≥ 20°C, then the heating stops. If the charging current enters < 150A again during the process, and if Tmin ≤ 25°C at this time, it enters the corresponding < 150A heating strategy and continues heating. If Tmin > 25°C at this time, it enters the corresponding < 150A heating strategy, the heating condition is not met, and the heating stops. The same applies to other situations.

[0096] As Figure 7 shown, by customizing the SC_1 module (i.e., the battery thermal management strategy calibration simulation model), the flow control of battery fast charging thermal management is realized:

[0097] First, the implementation principle of the high-current cooling strategy: The real-time battery Tmax and module 1 (the substitute value of the battery temperature) are input into module 9 (receiving the current interval determination signal). When in the high-current interval, module 9 outputs the battery Tmax. The high-current cooling strategy threshold is set in module 19 (the thermal management strategy determination module). Only when its input signal changes from less than 35 to greater than or equal to 35, module 19 outputs the required cooling flow rate of 20, and the battery cooling starts. Only when the input signal decreases from greater than 30 to less than or equal to 30, module 19 outputs 0 flow rate and the cooling stops. When in the low-current interval, module 9 outputs the substitute value of the battery Tmax of module 1, and this value is less than the cooling-off value. Module 19 outputs 0 flow rate, and the high-current cooling strategy stops.

[0098] Second, the implementation principle of the low-current cooling strategy: The real-time battery Tmax and module 3 (the substitute value of the battery temperature) are input into module 11 (receiving the current interval determination signal). When in the low-current interval, module 11 outputs the battery Tmax. The low-current cooling strategy threshold is set in module 21 (the thermal management strategy determination module). Only when its input signal changes from less than 40 to greater than or equal to 40, module 21 outputs the required cooling flow rate of 15, and the battery cooling starts. Only when the input signal decreases from greater than 35 to less than or equal to 35, module 21 outputs 0 flow rate and the cooling stops. When in the high-current interval, module 11 outputs the substitute value of the battery Tmax of module 3, and this value is less than the cooling-off value. Module 21 outputs 0 flow rate, and the low-current cooling strategy stops. An example of the cooling strategy jump between high and low currents is as Figure 5 shown.

[0099] Third, the implementation principle of the high-current heating strategy: The real-time battery Tmin and Module 2 (the substitute value of the battery temperature) are input into Module 11. When in the high-current range, Module 10 (receiving the current range determination signal) outputs the battery Tmin. In Module 20 (the thermal management strategy determination module), the high-current heating strategy threshold is set. Only after its input signal decreases from greater than 15 to less than or equal to 15, Module 20 outputs the required heating flow rate 20, and starts battery heating. Only after the input signal increases from less than 20 to greater than or equal to 20, Module 20 outputs a flow rate of 0 and stops heating. When in the low-current range, Module 10 outputs the substitute value of the battery Tmin of Module 2, and this value is greater than the heating-off value. Module 20 outputs a flow rate of 0, and the high-current heating strategy stops.

[0100] Fourth, the implementation principle of the low-current heating strategy: The real-time battery Tmin and Module 4 (the substitute value of the battery temperature) are input into Module 12 (receiving the current range determination signal). When in the low-current range, Module 12 outputs the battery Tmin. In Module 22 (the thermal management strategy determination module), the low-current heating strategy threshold is set. Only after its input signal decreases from greater than 25 to less than or equal to 25, Module 22 outputs the required heating flow rate 15, and starts battery heating. Only after the input signal increases from less than 30 to greater than or equal to 30, Module 22 outputs a flow rate of 0 and stops heating. When in the low-current range, Module 12 outputs the substitute value of the battery Tmin of Module 4, and this value is greater than the heating-off value. Module 22 outputs a flow rate of 0, and the low-current heating strategy stops. An example of the implementation of the heating strategy jump between high and low currents is as Figure 6 shown.

[0101] Fifth, the implementation principle of heating or cooling under high current: Module 19 and Module 20 are input into Module 7 (the heating demand flow rate and cooling demand flow rate comparison module) for determination between heating and cooling. At the same time, Module 19 and Module 20 are input into Module 16 (receiving the determination signal of heating or cooling flow rate). When the cooling demand is met, Module 16 receives the determination signal from Module 7 and outputs the cooling flow rate value of Module 19. When the heating demand is met, Module 16 receives the determination signal from Module 7 and outputs the heating flow rate value of Module 20.

[0102] Sixth, the implementation principle of heating or cooling under low current: Module 21 and Module 22 are input into Module 8 (the heating demand flow rate and cooling demand flow rate comparison module) for determination between heating and cooling. At the same time, Module 21 and Module 22 are input into Module 15 (receiving the determination signal of heating or cooling flow rate). When the cooling demand is met, Module 15 receives the determination signal from Module 8 and outputs the cooling flow rate value of Module 21. When the heating demand is met, Module 15 receives the determination signal from Module 8 and outputs the heating flow rate value of Module 22 (the thermal management strategy determination module).

[0103] Seventh, determine the implementation principle of the final strategic demand flow: Modules 16 and 15 simultaneously input into Module 17 (which accepts the current range determination signal). According to the current range determination signal of Module 6 (current comparison module), when in the high-current range, Module 17 outputs the flow value of Module 16; when in the low-current range, Module 17 outputs the flow value of Module 15. Through the flow value, the on and off of the thermal management system are realized.

[0104] As Figure 7 shown, by customizing the SC_2 module (the simulation model of the vehicle-battery thermal management water temperature gauge), the water temperature control of the battery fast charging thermal management is realized:

[0105] Figure 7 In it, the custom modules 23 and 24 are the calculation modules for the cooling water temperature of the vehicle battery. They simplify the modeling of the compressor refrigeration system assembly, the chiller refrigerant-coolant heat exchange assembly, and the vehicle pipeline system. The outlet water temperature signal is input into the cooling water temperature calculation module, and the water temperature signal after heat exchange and cooling is output to the inlet of the battery cold plate flow channel model.

[0106] The calculation model of the cooled water temperature is:

[0107]

[0108] In the formula, Temp cooled is the cooled water temperature, Temp battery outlet is the outlet water temperature signal of the cold plate flow channel model, Cp is the specific heat capacity of the coolant used, ρ is the density of the coolant, F inlet is the system thermal management flow rate, Q cooling system is the refrigeration capacity of the vehicle refrigeration system. This value is determined by the heat exchange capacity or refrigeration capacity of each component actually participating in the work in the specific vehicle battery refrigeration circuit, and the minimum value in the entire refrigeration circuit, that is, the bottleneck value, is adopted. The Kc value is the correction coefficient of the system refrigeration capacity. The comprehensive refrigeration capacity of the refrigeration system is affected by multiple factors. The ambient temperature, system flow rate, and coolant temperature with the main influence are selected for calibration tests to obtain it.

[0109] The calibration process and results of the boundary parameter Kc value are as follows:

[0110] Let the vehicle stand still in an environment with a temperature of 5°C. Control the vehicle to start the heating cycle through an external device, so that the temperature of all the coolant reaches 55°C and stabilizes. Then start the vehicle's refrigeration system, aiming to cool it down to 10°C, and conduct a circulating cooling at a flow rate of 10 L / min. Record the temperature changes at the inlet and outlet of the cooling system. Input the test results (i.e., the first test results) into the vehicle's battery cooling water temperature calculation model, adjust the Kc value under different inlet coolant temperatures to conduct an outlet water temperature curve test and simulation fitting, and determine the Kc value under the current working conditions. Restart the heating cycle, adjust the flow rate to 15 L / min and 20 L / min, repeat the above steps, and complete the calibration of the Kc value at this environmental temperature. Adjust the environmental temperature to 25°C and 45°C, repeat the above steps. The calibrated environmental temperatures should include the lowest temperature at which the refrigeration system operates, and complete the calibration of the Kc value at other environmental temperatures. Import the calibrated Kc value into the simulation calculation model. The Kc value among different environmental temperatures, flow rates, and cooling water temperatures is determined by interpolation. For working conditions outside the boundary, use the boundary values instead to complete the vehicle's battery cooling water temperature calculation module. The environmental temperature, flow rate, coolant temperature, and calibration results used in the above calibration are only reference values and need to be adjusted according to the actual working conditions.

[0111] Figure 7 In the custom modules 25 and 26, they are the vehicle's battery heating water temperature calculation modules. Simplify and model the PTC heating system assembly, motor stall heating system assembly, heat pump system heating assembly, and vehicle's battery heating circulation pipeline system. Input the outlet water temperature signal into the heating water temperature calculation module, and output the water temperature signal after vehicle heating to the inlet of the battery cold plate flow channel model.

[0112] The calculation model of the heated water temperature is:

[0113]

[0114] Similar to the cooling water temperature calculation model, in the formula, Temp heated is the heated water temperature, Qheating system is the heating system power, and this value is the total power of each system participating in battery heating. The k h value is the system heating power correction coefficient. For the heating system, the heating power is affected by the system flow rate and coolant temperature. Since the low-temperature charging time is relatively long, the system working duration will also affect the heating system power. In addition, the environmental temperature also affects the heating capacity. For example, the heat pump system cannot work below a certain environmental temperature.

[0115] The boundary parameter K h The calibration process and results are as follows:

[0116] Place the vehicle in an environment of -30°C and fully soak it. Start the vehicle heating system and aim to heat it to 60°C. Conduct cyclic heating at 10 L / min, record the temperature changes at the inlet and outlet of the heating system, input the test results into the vehicle battery heating water temperature calculation model, and determine the value of K by adjusting the K h value to fit the test and simulation outlet temperatures under the current working conditions. Adjust the ambient temperature and fully soak the vehicle, and repeat the above steps to complete the calibration of all K h values. When the heating system includes a heat pump heating system, the calibration ambient temperature needs to increase the minimum ambient temperature at which the heat system operates. During the heating process, the coolant temperature needs to start heating when it is consistent with the ambient temperature to simulate the impact of long-term operation on the heating system performance. Input the calibrated K h value into the vehicle battery heating water temperature calculation module to complete the model setting. h value into the vehicle battery heating water temperature calculation module to complete the model setting.

[0117] Implementation principle of water temperature strategy adjustment:

[0118] First step: Set the required water temperature and flow rate values for small-current cooling in module 23, the required water temperature and flow rate values for large-current cooling in module 24, the required water temperature and flow rate values for small-current heating in module 25, and the required water temperature and flow rate values for large-current heating in module 26. According to the input of the battery outlet water temperature signal, calculate the outlet water temperature after heat exchange in the four modules simultaneously. Figure 7 First step: Set the required water temperature and flow rate values for small-current cooling in module 23, the required water temperature and flow rate values for large-current cooling in module 24, the required water temperature and flow rate values for small-current heating in module 25, and the required water temperature and flow rate values for large-current heating in module 26. According to the input of the battery outlet water temperature signal, calculate the outlet water temperature after heat exchange in the four modules simultaneously.

[0119] Second step: Input the water temperature signals calculated by module 23 and module 25 into module 13 (judgment signal for heating or cooling flow rate), determine the heating water temperature or cooling water temperature under small current through the signal input by module 8, and output it to module 18 (receive current range judgment signal).

[0120] Second step: Input the water temperature signals calculated by module 23 and module 25 into module 13 (judgment signal for heating or cooling flow rate), determine the heating water temperature or cooling water temperature under small current through the signal input by module 8, and output it to module 18 (receive current range judgment signal).

[0121] Third step: Input the water temperature signals calculated by module 24 and module 26 into module 14 (receive judgment signal for heating or cooling flow rate), determine the heating water temperature or cooling water temperature under large current through the signal input by module 7, and output it to module 18.

[0122] Third step: Input the water temperature signals calculated by module 24 and module 26 into module 14 (receive judgment signal for heating or cooling flow rate), determine the heating water temperature or cooling water temperature under large current through the signal input by module 7, and output it to module 18.

[0123] Based on as Figure 7The custom modules SC_1 and SC_2 shown implement the jump of complex strategies and the simulation simplification of the vehicle's thermal management system. Finally, the basic strategy parameters to be optimized are input into the vehicle-battery fast-charging thermal management strategy calibration simulation model to obtain relevant parameters such as battery temperature, charging current, thermal management energy consumption, and charging time during the entire charging process under this strategy. The charging time and thermal management energy consumption are selected as the optimization objects, with their minimum values as the target values. The thermal management strategy threshold is set as the adjustment value, and the allowable change range of the threshold is set. By running the automatic optimization calculation, the strategy with the shortest charging time and the lowest thermal management energy consumption under the current working conditions can be obtained. Adjust the working conditions and repeat the above steps. Finally, complete the calibration and optimization of the thermal management strategy to determine the battery thermal management strategy.

[0124] Figures 8 to 11 For the display of vehicle test and simulation results, after modeling and completing parameter calibration through the above method, compare the vehicle test and simulation results under the same working conditions to verify the accuracy and usability of the simulation model. Through the simulation calibration method of the battery thermal management strategy described in the embodiments of the present invention, while improving the simulation speed, the simulation error is ensured to be controlled within an extremely small range. Among them, Figure 8 For the display of fast charging at -20°C - battery temperature simulation and test calibration, Figure 9 For the display of fast charging at -20°C - charging current simulation and test calibration, Figure 10 For the display of fast charging at -20°C - SoC simulation and test calibration, Figure 11 For the display of fast charging at -20°C - inlet temperature simulation and test calibration.

[0125] Optionally, in the method, before obtaining the component simulation models corresponding to multiple components of the battery thermal management system, the method further includes:

[0126] Establish a custom component simulation model according to the component;

[0127] Obtain the calibration parameters corresponding to the custom component simulation model according to the second test result; wherein, the second test result is the test result of the bench test of the component corresponding to the custom component simulation model;

[0128] Obtain a parameter matrix according to the calibration parameters;

[0129] Correct the custom component simulation model according to the parameter matrix to obtain the component simulation model.

[0130] In this embodiment, a custom simulation model of the component is built in the AMESim software. By encapsulating the model and defining the interfaces, a general component simulation model library is formed. A bench test of the component is built, and the custom component simulation model is corrected according to the second test result. The calibration parameters are obtained during the test to form the parameter matrix, and all settings of the component simulation model are completed to obtain the component simulation model.

[0131] Optionally, in the method, the subsystem simulation model includes one or more of the following:

[0132] Battery charging subsystem simulation model;

[0133] Battery pack thermal management subsystem simulation model;

[0134] Vehicle battery heating subsystem simulation model;

[0135] Vehicle battery cooling subsystem simulation model.

[0136] In this embodiment, as Figure 2 shown, the subsystem simulation model includes the battery charging subsystem simulation model, the battery pack thermal management subsystem simulation model, the vehicle battery heating subsystem simulation model, and the vehicle battery cooling subsystem simulation model.

[0137] Optionally, in the method, when the subsystem simulation model includes a battery charging subsystem simulation model, the component simulation model includes one or more of the following:

[0138] Battery state of charge calculation module simulation model; wherein, the first interface between multiple component simulation models includes an input interface for the real-time charging current value and an output interface for the real-time state of charge calculation value;

[0139] Battery charging current calculation module simulation model; wherein, the first interface includes an input interface for the real-time battery temperature value, an input interface for the real-time state of charge calculation value, and an output interface for the real-time charging current value.

[0140] In this embodiment, as Figure 2 shown, the battery charging subsystem simulation model includes the battery state of charge calculation module simulation model and the battery charging current calculation module simulation model. As Figure 3 shown, the first interface corresponding to the battery state of charge calculation module simulation model includes the input interface for the real-time charging current value and the output interface for the real-time state of charge calculation value; the first interface of the battery charging current calculation module simulation model includes the input interface for the real-time battery temperature value, the input interface for the real-time state of charge calculation value, and the output interface for the real-time charging current value.

[0141] Optionally, in the method, when the subsystem simulation model includes a battery pack thermal management subsystem simulation model, the component simulation model includes one or more of the following:

[0142] Battery thermal characteristics simulation model; wherein, the first interface between multiple component simulation models includes a cold plate-battery heat exchange interface, an input interface for the real-time battery heat generation power value, and an output interface for the real-time battery temperature value;

[0143] Battery cold plate flow channel module simulation model; wherein, the first interface includes a battery-cold plate heat exchange interface, an input interface for the cold plate inlet flow rate, an input interface for the cold plate inlet temperature, and an output interface for the cold plate outlet temperature;

[0144] Battery heat generation calculation simulation model; wherein, the first interface includes an input interface for the real-time state of charge value, an input interface for the real-time charging current value, an input interface for the real-time battery temperature value, and an output interface for the real-time battery heat generation power value;

[0145] Battery thermal management strategy calibration simulation model; wherein, the first interface includes an input interface for the maximum battery temperature, an input interface for the minimum battery temperature, an input interface for the charging current, an output interface for the large current strategy required flow rate value, an output interface for the small current strategy required flow rate value, an output interface for the switching strategy required flow rate output, and an output interface for the switching strategy required water temperature output.

[0146] In this embodiment, as Figure 2 shown, the battery pack thermal management subsystem simulation model includes the battery thermal characteristics simulation model, the battery cold plate flow channel module simulation model, the battery heat generation calculation simulation model, and the battery thermal management strategy calibration simulation model. As Figure 3As shown in the figure, the first interface of the battery thermal characteristics simulation model includes the cold plate-battery heat exchange interface, the input interface of the real-time battery heating power value, and the output interface of the real-time battery temperature value; the first interface of the battery cold plate flow channel module simulation model includes the battery-cold plate heat exchange interface, the input interface of the cold plate inlet flow rate, the input interface of the cold plate inlet temperature, and the output interface of the cold plate outlet temperature; the first interface of the battery heat generation calculation simulation model includes the input interface of the real-time state of charge value, the input interface of the real-time charging current value, the input interface of the real-time battery temperature value, and the output interface of the real-time battery heating power value; the first interface of the battery thermal management strategy calibration simulation model includes the input interface of the maximum battery temperature, the input interface of the minimum battery temperature, the input interface of the charging current, the output interface of the required flow rate value for the high-current strategy, the output interface of the required flow rate value for the low-current strategy, the output interface of the required flow rate for the switching strategy, and the output interface of the required water temperature for the switching strategy. In addition, the subsystem simulation model further includes a vehicle-integrated battery heating subsystem simulation model and a vehicle-integrated battery cooling subsystem simulation model. Among them, the vehicle-integrated battery heating subsystem simulation model includes a PTC heater system assembly simulation model, a motor stall heating system assembly simulation model, a heat pump compressor heating system assembly simulation model, and a vehicle-integrated battery heating circulation pipeline assembly simulation model; the vehicle-integrated battery cooling subsystem simulation model includes a compressor refrigeration system assembly simulation model, a Chiler refrigerant-coolant heat exchange assembly simulation model, and a vehicle-integrated battery cooling circulation pipeline assembly simulation model.

[0147] Optionally, in the method, when the subsystem simulation model includes a vehicle-integrated battery heating subsystem simulation model and a vehicle-integrated battery cooling subsystem simulation model, the component simulation model includes:

[0148] A vehicle-integrated battery thermal management water temperature simulation model; wherein, the first interface between multiple component simulation models includes an input interface for the outlet water temperature signal, an input interface for comparing the heating and cooling flow rates under high current, an input interface for comparing the heating and cooling flow rates under low current, an output interface for the thermal management water temperature under high current, and an output interface for the thermal management water temperature under low current.

[0149] In this embodiment, as Figure 3 shown, the vehicle-integrated battery heating subsystem simulation model and the vehicle-integrated battery cooling subsystem simulation model are integrated to form a vehicle-battery heating and cooling subsystem simulation model, which includes the vehicle-integrated battery thermal management water temperature simulation model. Taking the demand mode (heating / cooling), the required water temperature, the required flow rate, and the cold plate outlet temperature as inputs, and taking the vehicle-integrated battery thermal management outlet water temperature and the vehicle-integrated battery thermal management outlet flow rate as outputs, and outputting them to the battery cold plate flow channel module simulation model.

[0150] As Figure 12 shown, to achieve the above object, an embodiment of the present invention further provides a simulation calibration device for a battery thermal management strategy, which includes:

[0151] A first acquisition module 1201, configured to acquire component simulation models corresponding to multiple components of a battery thermal management system;

[0152] A second acquisition module 1202, configured to acquire a battery thermal management system simulation model according to the component simulation models; wherein, the battery thermal management system simulation model includes multiple subsystem simulation models, and the subsystem simulation models include multiple of the component simulation models;

[0153] A first determination module 1203, configured to perform simulation calibration of a battery thermal management strategy according to the battery thermal management system simulation model, and determine the battery thermal management strategy.

[0154] Optionally, for the device, wherein the second acquisition module 1202 includes:

[0155] A first acquisition unit, configured to connect a first interface between multiple of the component simulation models according to subsystem principles, and acquire the subsystem simulation model;

[0156] A second acquisition unit, configured to connect a second interface between multiple of the subsystem simulation models according to battery thermal management system principles, and acquire the battery thermal management system simulation model.

[0157] Optionally, for the device, wherein the first determination module 1203 includes:

[0158] A third acquisition unit, configured to acquire a calibration correction simulation model according to the battery thermal management system simulation model;

[0159] A fourth acquisition unit, configured to perform simulation calculations according to the calibration correction simulation model, and acquire a calculation result;

[0160] A first determination unit, configured to determine the battery thermal management strategy when the calculation result is within a preset interval; wherein, the preset interval is set according to a target value capable of realizing battery thermal management strategy calibration.

[0161] Optionally, for the device, wherein the third acquisition unit includes:

[0162] A first acquisition component, configured to acquire a first test result of a benchmark working condition test of a battery thermal management system at different temperatures;

[0163] A second acquisition component, configured to acquire a simulation result of the battery thermal management system simulation model;

[0164] A third acquisition component, configured to correct boundary parameters of the simulation model of the battery thermal management system at different temperatures according to the first test result and the simulation result, and obtain the calibrated and corrected simulation model.

[0165] Optionally, the device further includes:

[0166] A first processing module, configured to establish a custom component simulation model according to the component;

[0167] A third acquisition module, configured to obtain calibration parameters corresponding to the custom component simulation model according to a second test result; wherein, the second test result is the test result of a bench test of the component corresponding to the custom component simulation model;

[0168] A fourth acquisition module, configured to obtain a parameter matrix according to the calibration parameters;

[0169] A fifth acquisition module, configured to correct the custom component simulation model according to the parameter matrix to obtain the component simulation model.

[0170] Optionally, for the device, wherein the subsystem simulation model includes one or more of the following:

[0171] A battery charging subsystem simulation model;

[0172] A battery pack thermal management subsystem simulation model;

[0173] A vehicle battery heating subsystem simulation model;

[0174] A vehicle battery cooling subsystem simulation model.

[0175] Optionally, for the device, wherein when the subsystem simulation model includes a battery charging subsystem simulation model, the component simulation model includes one or more of the following:

[0176] A state of charge calculation module simulation model of the battery; wherein, a first interface between multiple component simulation models includes an input interface for a real-time charging current value and an output interface for a real-time state of charge calculation value;

[0177] A battery charging current calculation module simulation model; wherein, the first interface includes an input interface for a real-time battery temperature value, an input interface for a real-time state of charge calculation value, and an output interface for a real-time charging current value.

[0178] Optionally, for the device, wherein when the subsystem simulation model includes a battery pack thermal management subsystem simulation model, the component simulation model includes one or more of the following:

[0179] Battery thermal characteristic simulation model; wherein, the first interfaces between multiple said component simulation models include a cold plate-battery heat exchange interface, an input interface for the real-time battery heat generation power value, and an output interface for the real-time battery temperature value;

[0180] Battery cold plate flow channel module simulation model; wherein, the first interfaces include a battery-cold plate heat exchange interface, an input interface for the cold plate inlet flow rate, an input interface for the cold plate inlet temperature, and an output interface for the cold plate outlet temperature;

[0181] Battery heat generation calculation simulation model; wherein, the first interfaces include an input interface for the real-time state of charge value, an input interface for the real-time charging current value, an input interface for the real-time battery temperature value, and an output interface for the real-time battery heat generation power value;

[0182] Battery thermal management strategy calibration simulation model; wherein, the first interfaces include an input interface for the maximum battery temperature, an input interface for the minimum battery temperature, an input interface for the charging current, an output interface for the required flow rate value of the high-current strategy, an output interface for the required flow rate value of the low-current strategy, an output interface for the required flow rate output of the switching strategy, and an output interface for the required water temperature output of the switching strategy.

[0183] Optionally, for the said device, wherein, when the subsystem simulation model includes a whole-vehicle battery heating subsystem simulation model and a whole-vehicle battery cooling subsystem simulation model, the component simulation models include:

[0184] Whole-vehicle battery thermal management water temperature simulation model; wherein, the first interfaces between multiple said component simulation models include an input interface for the outlet water temperature signal, an input interface for comparing the heating and cooling flow rates under high current, an input interface for comparing the heating and cooling flow rates under low current, an output interface for the thermal management water temperature under high current, and an output interface for the thermal management water temperature under low current.

[0185] It should be noted here that the above device provided by the embodiments of the present invention can implement all the method steps implemented by the above method embodiments and can achieve the same technical effects. The same parts and beneficial effects as those in the method embodiments will not be specifically described in this embodiment.

[0186] To achieve the above object, an embodiment of the present invention also provides an electronic device, including: a processor, a memory, and a program or instruction stored on the memory and executable on the processor; wherein, when the processor executes the program or instruction, it implements the simulation calibration method of the battery thermal management strategy as described above.

[0187] To achieve the above object, an embodiment of the present invention further provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps in the simulation calibration method of the battery thermal management strategy described above are implemented.

[0188] It should be further noted that the terminals described in this specification include but are not limited to smart phones, tablet computers, etc., and many of the described functional components are referred to as modules to more particularly emphasize the independence of their implementation manners.

[0189] In an embodiment of the present invention, a module can be implemented by software so as to be executed by various types of processors. For example, an identified executable code module can include one or more physical or logical blocks of computer instructions. For example, it can be constructed as an object, a process, or a function. Nevertheless, the executable code of the identified module does not need to be physically located together, but can include different instructions stored in different locations. When these instructions are logically combined together, they constitute the module and achieve the specified purpose of the module.

[0190] In fact, the executable code module can be a single instruction or many instructions, and can even be distributed on multiple different code segments, distributed in different programs, and distributed across multiple memory devices. Similarly, the operation data can be identified within the module, and can be implemented in any appropriate form and organized in any appropriate type of data structure. The operation data can be collected as a single data set, or can be distributed in different locations (including on different storage devices), and at least partially can only exist as an electronic signal in the system or network.

[0191] When the module can be implemented by software, considering the level of existing hardware technology, for the modules that can be implemented by software, without considering the cost, those skilled in the art can build corresponding hardware circuits to implement the corresponding functions. The hardware circuits include conventional very large scale integration (VLSI) circuits or gate arrays, as well as existing semiconductors such as logic chips, transistors, or other discrete components. The module can also be implemented by programmable hardware devices, such as field programmable gate arrays, programmable array logics, programmable logic devices, etc.

[0192] To achieve the above object, an embodiment of the present invention further provides a computer program product, which includes computer instructions, and when the computer instructions are executed by a processor, the steps of the simulation calibration method of the battery thermal management strategy described above are implemented.

[0193] The above exemplary embodiments have been described with reference to the accompanying drawings. Many different forms and embodiments are possible without departing from the spirit and teachings of the invention. Therefore, the invention should not be construed as being limited to the exemplary embodiments presented herein. Rather, these exemplary embodiments are provided so that the invention will be complete and full, and will convey the scope of the invention to those skilled in the art. In the drawings, component sizes and relative sizes may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used herein, unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Unless otherwise indicated, when stating a value range, the range includes the upper and lower limits thereof and any sub-ranges therebetween.

[0194] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A simulation calibration method for a battery thermal management strategy, characterized in that: include: Obtain component simulation models corresponding to multiple components of a battery thermal management system; Acquire a battery thermal management system simulation model according to the component simulation model; wherein the battery thermal management system simulation model includes a plurality of subsystem simulation models, and the subsystem simulation model includes a plurality of the component simulation models; The battery thermal management strategy is simulated and calibrated according to the battery thermal management system simulation model to determine the battery thermal management strategy.

2. The method according to claim 1, characterized in that: The step of obtaining a battery thermal management system simulation model according to the component simulation model comprises: Connecting the first interfaces between the plurality of component simulation models according to the subsystem principle to obtain the subsystem simulation model; According to the battery thermal management system principle, the second interfaces between the plurality of subsystem simulation models are connected to obtain the battery thermal management system simulation model.

3. The method according to claim 1, characterized in that: The performing simulation calibration of the battery thermal management strategy according to the battery thermal management system simulation model to determine the battery thermal management strategy includes: Acquire a calibration correction simulation model according to the battery thermal management system simulation model; Perform simulation calculation according to the calibration and correction simulation model to obtain calculation results; When the calculation result is within a preset interval, the battery thermal management strategy is determined; wherein the preset interval is set according to a target value that can achieve calibration of the battery thermal management strategy.

4. The method according to claim 3, characterized in that The step of obtaining a calibration correction simulation model according to the battery thermal management system simulation model includes: Obtaining first test results of a baseline operating condition test of a battery thermal management system at different temperatures; Obtaining simulation results of the battery thermal management system simulation model; According to the first test result and the simulation result, boundary parameters of the battery thermal management system simulation model at different temperatures are corrected to obtain the calibrated and corrected simulation model.

5. The method according to claim 1, characterized in that Before obtaining component simulation models corresponding to multiple components of the battery thermal management system, the method further includes: establishing a custom component simulation model based on the component; Acquire calibration parameters corresponding to the custom component simulation model according to a second test result; wherein the second test result is a test result of a bench test of the component corresponding to the custom component simulation model; Acquire a parameter matrix according to the calibration parameters; The custom component simulation model is modified according to the parameter matrix to obtain the component simulation model.

6. The method according to claim 1, characterized in that The subsystem simulation model includes one or more of the following: Battery charging subsystem simulation model; Battery pack thermal management subsystem simulation model; Vehicle battery heating subsystem simulation model; Vehicle battery cooling subsystem simulation model.

7. The method according to claim 2 or 6, characterized in that: In the case where the subsystem simulation model includes a battery charging subsystem simulation model, the component simulation model includes one or more of the following: A battery state of charge calculation module simulation model; wherein the first interface between the plurality of component simulation models comprises an input interface for a real-time charging current value and an output interface for a real-time state of charge calculation value; A battery charging current calculation module simulation model; wherein the first interface includes an input interface for a real-time battery temperature value, an input interface for a real-time state of charge calculation value, and an output interface for a real-time charging current value.

8. The method according to claim 2 or 6, characterized in that: In the case where the subsystem simulation model includes a battery pack thermal management subsystem simulation model, the component simulation model includes one or more of the following: A battery thermal characteristic simulation model; wherein the first interface between the plurality of component simulation models comprises a cold plate-battery heat exchange interface, an input interface for a real-time battery heating power value, and an output interface for a real-time battery temperature value; A simulation model of a battery cold plate flow channel module; wherein the first interface includes a battery-cold plate heat exchange interface, an input interface for a cold plate inlet flow rate, an input interface for a cold plate inlet temperature, and an output interface for a cold plate outlet temperature; A battery heat generation calculation simulation model; wherein the first interface includes an input interface for a real-time state of charge value, an input interface for a real-time charging current value, an input interface for a real-time battery temperature value, and an output interface for a real-time battery heating power value; Battery thermal management strategy calibration simulation model; wherein, the first interface includes an input interface for the maximum battery temperature, an input interface for the minimum battery temperature, an input interface for the charging current, an output interface for the large current strategy required flow value, an output interface for the small current strategy required flow value, an output interface for the switching strategy required flow output, and an output interface for the switching strategy required water temperature output.

9. The method according to claim 2 or 6, characterized in that: In the case where the subsystem simulation model includes a whole vehicle battery heating subsystem simulation model and a whole vehicle battery cooling subsystem simulation model, the component simulation model includes: A whole vehicle battery thermal management water temperature simulation model; wherein, the first interface between the multiple component simulation models includes an input interface for the output water temperature signal, an input interface for comparing the heating and cooling flow rates under large current, an input interface for comparing the heating and cooling flow rates under small current, an output interface for the thermal management water temperature under large current, and an output interface for the thermal management water temperature under small current.

10. A simulation calibration device for a battery thermal management strategy, characterized in that: include: A first acquisition module, used to acquire component simulation models corresponding to multiple components of the battery thermal management system; A second acquisition module is used to acquire a battery thermal management system simulation model according to the component simulation model; wherein the battery thermal management system simulation model includes a plurality of subsystem simulation models, and the subsystem simulation model includes a plurality of the component simulation models; The first determination module is used to perform simulation calibration of the battery thermal management strategy according to the battery thermal management system simulation model to determine the battery thermal management strategy.

11. An electronic device, comprising: A processor, a memory, and a program or instruction stored in the memory and executable on the processor; characterized in that when the processor executes the program or instruction, a simulation calibration method for a battery thermal management strategy as described in any one of claims 1 to 9 is implemented.

12. A readable storage medium having a program or instruction stored thereon, characterized in that: When the program or instruction is executed by the processor, the steps in the simulation calibration method of the battery thermal management strategy as described in any one of claims 1 to 9 are implemented.

13. A computer program product, characterized in that The method comprises computer instructions, which, when executed by a processor, implement the steps of the simulation calibration method for the battery thermal management strategy as described in any one of claims 1 to 9.

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