Battery direct cooling analysis processing method and device, electronic equipment and storage medium

Abstract

The invention provides a battery direct cooling analysis processing method and device, electronic equipment and a storage medium. The method comprises the steps that a pre-established whole vehicle one-dimensional direct cooling system model and a pre-established three-dimensional battery heat transfer model are connected and combined into a joint simulation model; performing a charge-discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and measuring and recording battery data in the simulation test process in real time; and inputting the battery data into a neural network model to predict the battery temperature to obtain a battery temperature prediction result. According to the method, the actual vehicle using scene is considered through the joint simulation model, the simulation precision is improved, the simulation temperature is closer to the measured value, meanwhile, the battery temperature is predicted through the neural network model, the simulation period can be shortened, and simulation and test resources are saved.

Description

Technical Field

[0001] The present application relates to the technical field of automotive battery thermal management, and in particular to a battery direct cooling analysis and processing method, device, electronic equipment and storage medium. Background Art

[0002] When the power battery is working in a fast charging and discharging state, it will generate heat. The accumulated heat will not only affect the working efficiency of the battery, but also shorten the cycle life of the battery. If the heat accumulated in the battery is too high, it may also trigger a thermal runaway reaction, leading to battery safety problems. Therefore, battery thermal management technology is crucial to battery life and safety. The battery direct cooling solution is one of the battery thermal management technologies. It combines the battery cooling system with the automotive air-conditioning system. The battery cold plate serves as the evaporator of the air-conditioning system, and the refrigerant serves as the refrigerant of the thermal management system. At present, the direct cooling system has been used in many new energy vehicle models and energy storage stations. How to design an effective battery direct cooling solution has received widespread attention.

[0003] Most of the existing direct cooling analysis methods for batteries are based on experiments. One method is to obtain direct cooling test data for batteries under typical working conditions by building a heat pump system bench and using a scheme that controls variable parameters, and then optimize the scheme based on the analysis of the test results. The other method is to bring the heating power curve under the adiabatic state into the simulation model, and combine the model with two-phase flow simulation to consider the phase change heat transfer between the direct cooling plate with refrigerant and the battery cell to perform theoretical scheme design and optimization. These two schemes can provide guidance for the design of direct cooling battery pack schemes from the perspective of theoretical analysis and experimental acquisition, but the existing direct cooling analysis methods for batteries have errors, resulting in inaccurate analysis results. Summary of the invention

[0004] The purpose of the present application is to provide a battery direct cooling analysis processing method, device, electronic device and storage medium to improve the accuracy of the battery direct cooling analysis results in view of the deficiencies in the above-mentioned prior art.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery direct cooling analysis and processing method, the method comprising:

[0007] A pre-established one-dimensional direct cooling system model of a whole vehicle and a pre-established three-dimensional battery heat transfer model are connected and combined into a joint simulation model, wherein the one-dimensional direct cooling system model of the whole vehicle includes a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, and the three-dimensional battery heat transfer model includes a three-dimensional refrigerant inlet and a three-dimensional refrigerant outlet, wherein the one-dimensional refrigerant outlet is connected to the three-dimensional refrigerant inlet, and the three-dimensional refrigerant outlet is connected to the one-dimensional refrigerant inlet;

[0008] Performing a charge-discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and measuring and recording the battery data during the simulation test in real time;

[0009] The battery data is input into a neural network model to predict the battery temperature, thereby obtaining a battery temperature prediction result.

[0010] Optionally, the one-dimensional direct cooling system model of the whole vehicle includes: a simulated compressor, a simulated sensor, a simulated expansion valve, a simulated two-way valve and a simulated evaporator;

[0011] The simulation compressor is used to compress the simulated flow of the refrigerant input into the one-dimensional direct cooling system model of the whole vehicle;

[0012] The simulation sensor is used to measure the refrigerant simulation pressure and refrigerant simulation flow in the one-dimensional direct cooling system model of the whole vehicle;

[0013] The simulated expansion valve is used to perform expansion regulation on the refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle;

[0014] The simulated two-way valve is used to control the opening or closing of the simulated pipeline in the one-dimensional direct cooling system model of the whole vehicle;

[0015] The simulated evaporator is used to evaporate the simulated flow of the refrigerant in the one-dimensional direct cooling system model of the whole vehicle.

[0016] Optionally, the three-dimensional battery heat transfer model includes: a simulated direct cooling plate, a simulated battery module and a simulated refrigerant component.

[0017] Optionally, performing a charge and discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and measuring and recording battery data in real time during the simulation test, includes:

[0018] The current one-dimensional refrigerant flow, the current one-dimensional refrigerant pressure and the current one-dimensional refrigerant dryness obtained by running the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional battery heat transfer model, and the current three-dimensional refrigerant flow and the current three-dimensional refrigerant pressure are obtained by running the three-dimensional battery heat transfer model. The current three-dimensional refrigerant pressure, the current one-dimensional refrigerant flow, the current three-dimensional refrigerant inlet temperature, the current three-dimensional refrigerant outlet temperature, the battery voltage, battery current and battery capacity in the current three-dimensional battery heat transfer model are recorded, and the current three-dimensional refrigerant flow is input into the one-dimensional direct cooling system model of the whole vehicle.

[0019] Optionally, the current one-dimensional refrigerant flow, the current one-dimensional refrigerant pressure and the current one-dimensional refrigerant dryness obtained by running the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional battery heat transfer model, and the current three-dimensional refrigerant flow and the current three-dimensional refrigerant pressure are obtained by running the three-dimensional battery heat transfer model, including:

[0020] The current one-dimensional refrigerant flow rate and the current one-dimensional refrigerant dryness in the one-dimensional direct cooling system model of the whole vehicle are input to the three-dimensional refrigerant inlet through the one-dimensional refrigerant outlet, and the current three-dimensional refrigerant flow rate and the current three-dimensional refrigerant pressure are output from the three-dimensional refrigerant outlet via the three-dimensional battery heat transfer model.

[0021] Optionally, the process of running the one-dimensional direct cooling system model of the whole vehicle to obtain the current one-dimensional refrigerant flow rate includes:

[0022] The one-dimensional direct cooling system model of the whole vehicle obtains the previous three-dimensional refrigerant flow output by the three-dimensional battery heat transfer model through the one-dimensional refrigerant inlet, and the simulated expansion valve, simulated evaporator and simulated compressor in the one-dimensional direct cooling system model of the whole vehicle adjust the previous three-dimensional refrigerant flow in turn to obtain the current one-dimensional refrigerant flow and the current one-dimensional refrigerant dryness, and make the current one-dimensional refrigerant pressure the same as the previous one-dimensional refrigerant pressure.

[0023] Optionally, the battery data is input into a neural network model to predict the battery temperature, and a battery temperature prediction result is obtained, including:

[0024] The neural network model performs feature extraction on the three-dimensional refrigerant pressure of each current time, the one-dimensional refrigerant flow rate of each current time, the three-dimensional refrigerant inlet temperature of each current time, the three-dimensional refrigerant outlet temperature of each current time, the battery voltage, battery current and battery capacity in the three-dimensional battery heat transfer model of each current time, and obtains multiple groups of change features, and inputs each group of change features into the fully connected layer for prediction processing to obtain the battery temperature prediction result.

[0025] In a second aspect, an embodiment of the present application further provides a battery direct cooling analysis and processing device, the device comprising:

[0026] A combination module, used to connect and combine a pre-established one-dimensional direct cooling system model of a whole vehicle with a pre-established three-dimensional battery heat transfer model into a joint simulation model, wherein the one-dimensional direct cooling system model of the whole vehicle includes a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, and the three-dimensional battery heat transfer model includes a three-dimensional refrigerant inlet and a three-dimensional refrigerant outlet, wherein the one-dimensional refrigerant outlet is connected to the three-dimensional refrigerant inlet, and the three-dimensional refrigerant outlet is connected to the one-dimensional refrigerant inlet;

[0027] A simulation test module, used to perform a charge and discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and to measure and record the battery data during the simulation test in real time;

[0028] The prediction module is used to input the battery data into the neural network model to predict the battery temperature and obtain the battery temperature prediction result.

[0029] Optionally, the one-dimensional direct cooling system model of the whole vehicle includes: a simulated compressor, a simulated sensor, a simulated expansion valve, a simulated two-way valve and a simulated evaporator;

[0030] The simulation compressor is used to compress the simulated flow of the refrigerant input into the one-dimensional direct cooling system model of the whole vehicle;

[0031] The simulation sensor is used to measure the refrigerant simulation pressure and refrigerant simulation flow in the one-dimensional direct cooling system model of the whole vehicle;

[0032] The simulated expansion valve is used to perform expansion regulation on the refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle;

[0033] The simulated two-way valve is used to control the opening or closing of the simulated pipeline in the one-dimensional direct cooling system model of the whole vehicle;

[0034] The simulated evaporator is used to evaporate the simulated flow of the refrigerant in the one-dimensional direct cooling system model of the whole vehicle.

[0035] Optionally, the three-dimensional battery heat transfer model includes: a simulated direct cooling plate, a simulated battery module and a simulated refrigerant component.

[0036] Optionally, the simulation test module is specifically used for:

[0037] The current one-dimensional refrigerant flow, the current one-dimensional refrigerant pressure and the current one-dimensional refrigerant dryness obtained by running the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional battery heat transfer model, and the current three-dimensional refrigerant flow and the current three-dimensional refrigerant pressure are obtained by running the three-dimensional battery heat transfer model. The current three-dimensional refrigerant pressure, the current one-dimensional refrigerant flow, the current three-dimensional refrigerant inlet temperature, the current three-dimensional refrigerant outlet temperature, the battery voltage, battery current and battery capacity in the current three-dimensional battery heat transfer model are recorded, and the current three-dimensional refrigerant flow is input into the one-dimensional direct cooling system model of the whole vehicle.

[0038] Optionally, the simulation test module is specifically used for:

[0039] The current one-dimensional refrigerant flow rate and the current one-dimensional refrigerant dryness in the one-dimensional direct cooling system model of the whole vehicle are input to the three-dimensional refrigerant inlet through the one-dimensional refrigerant outlet, and the current three-dimensional refrigerant flow rate and the current three-dimensional refrigerant pressure are output from the three-dimensional refrigerant outlet via the three-dimensional battery heat transfer model.

[0040] Optionally, the simulation test module is specifically used for:

[0041] The one-dimensional direct cooling system model of the whole vehicle obtains the previous three-dimensional refrigerant flow output by the three-dimensional battery heat transfer model through the one-dimensional refrigerant inlet, and the simulated expansion valve, simulated evaporator and simulated compressor in the one-dimensional direct cooling system model of the whole vehicle adjust the previous three-dimensional refrigerant flow in turn to obtain the current one-dimensional refrigerant flow and the current one-dimensional refrigerant dryness, and make the current one-dimensional refrigerant pressure the same as the previous one-dimensional refrigerant pressure.

[0042] Optionally, the prediction module is specifically used for:

[0043] The neural network model performs feature extraction on the three-dimensional refrigerant pressure of each current time, the one-dimensional refrigerant flow rate of each current time, the three-dimensional refrigerant inlet temperature of each current time, the three-dimensional refrigerant outlet temperature of each current time, the battery voltage, battery current and battery capacity in the three-dimensional battery heat transfer model of each current time, and obtains multiple groups of change features, and inputs each group of change features into the fully connected layer for prediction processing to obtain the battery temperature prediction result.

[0044] In a third aspect, an embodiment of the present application further provides an electronic device, comprising: a processor, a storage medium and a bus, wherein the storage medium stores program instructions executable by the processor, and when an application is running, the processor communicates with the storage medium via the bus, and the processor executes the program instructions to perform the steps of the battery direct cooling analysis and processing method described in the first aspect above.

[0045] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and the computer program is read and executes the steps of the battery direct cooling analysis and processing method described in the first aspect above.

[0046] The beneficial effects of this application are:

[0047] The present application provides a battery direct cooling analysis and processing method, device, electronic device and storage medium, which connect and combine a pre-established one-dimensional direct cooling system model of the whole vehicle with a pre-established three-dimensional battery heat transfer model into a joint simulation model, and take the actual vehicle usage scenario into consideration through the joint simulation model, thereby improving the simulation accuracy and making the simulation temperature closer to the actual measured value; according to the joint simulation model, a charge and discharge cycle simulation test is performed on the battery in the three-dimensional battery heat transfer model, then, when performing the simulation test, a cyclic direct cooling simulation is performed based on the battery in the actual working state of the whole vehicle, and the aging and attenuation problem of the battery during the use cycle is fully considered, and the battery under direct cooling is subjected to a charge and discharge cycle test; the battery data during the simulation test is input into a neural network model to predict the battery temperature, and the direct cooling simulation result within the entire life cycle of the battery can be predicted, which can shorten the simulation cycle and save simulation and test resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A schematic diagram of a process flow of a battery direct cooling analysis and processing method provided in an embodiment of the present application;

[0050] Figure 2 A schematic structural diagram of a one-dimensional direct cooling system model for a whole vehicle provided in an embodiment of the present application;

[0051] Figure 3 A schematic diagram of the structure of a three-dimensional battery heat transfer model provided in an embodiment of the present application;

[0052] Figure 4 A schematic diagram of a device for a battery direct cooling analysis and processing method provided in an embodiment of the present application;

[0053] Figure 5 A structural block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0055] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0056] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0057] Optionally, the battery direct cooling analysis and processing method provided in the embodiment of the present application is applied to an electronic device, which may be a terminal device with computing and display capabilities, such as a mobile phone, a tablet computer, a laptop computer, a PDA, a desktop computer, or a server. Specifically, it can be applied to an application in a terminal device, such as an APP (application, mobile phone software) of a mobile phone, an application system on a computer, etc.

[0058] The specific implementation process of the battery direct cooling analysis and processing provided in the embodiments of the present application is explained in detail below.

[0059] Figure 1 The flowchart of a battery direct cooling analysis and processing method provided in an embodiment of the present application is shown in FIG. 1 , wherein the execution subject of the method is the aforementioned electronic device. Figure 1 As shown, the method includes:

[0060] S101. Connect and combine a pre-established one-dimensional direct cooling system model of the whole vehicle and a pre-established three-dimensional battery heat transfer model into a joint simulation model.

[0061] Among them, the one-dimensional direct cooling system model of the whole vehicle may include a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, and the three-dimensional battery heat transfer model may include a three-dimensional refrigerant inlet and a three-dimensional refrigerant outlet. The one-dimensional refrigerant outlet is connected to the three-dimensional refrigerant inlet, and the three-dimensional refrigerant outlet is connected to the one-dimensional refrigerant inlet.

[0062] Optionally, the one-dimensional direct cooling system model of the whole vehicle is a one-dimensional simulation model established based on the actual operating conditions of the heat pump system of the whole vehicle. Specifically, it is obtained by a one-dimensional simulation of an existing heat pump test bench containing a battery pack and a cold plate. The three-dimensional battery heat transfer model is obtained by digitally simplifying the three-dimensional model of the battery pack. The three-dimensional battery heat transfer model can be used to perform simulated test operations of battery charging and discharging.

[0063] S102, performing a charge and discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and measuring and recording the battery data during the simulation test in real time.

[0064] Optionally, in the joint simulation model, real-time linkage simulation is performed through the one-dimensional direct cooling system model of the whole vehicle and the three-dimensional battery heat transfer model. Since the one-dimensional direct cooling system model of the whole vehicle is established based on the actual operating conditions of the heat pump system of the whole vehicle, the direct cooling simulation of the power battery in the actual fast charging cooling condition can be simulated in the process of real-time linkage simulation, that is, the real-time linkage simulation is based on the direct cooling simulation of the battery under the actual working state of the whole vehicle, and the influence of the heat pump system of the whole vehicle on the temperature of the battery during the actual charging and discharging process is taken into account in the process of charging and discharging cycle simulation test of the battery in the three-dimensional battery heat transfer model.

[0065] Optionally, considering that the battery parameters in the three-dimensional heat transfer model are also affected by the battery charge and discharge cycle, the battery data in each charge and discharge process is recorded during the cyclic charge and discharge test of the battery under direct cooling, and the battery data finally obtained includes the battery data in multiple charge and discharge processes. For example, after 20 rounds of cycle simulation tests on the battery, the battery data in 20 rounds of charge and discharge processes can be obtained.

[0066] S103: Inputting the battery data into the neural network model to predict the battery temperature and obtain a battery temperature prediction result.

[0067] Optionally, after obtaining the battery data during the cycle simulation test, the battery data is input into the neural network model to predict the battery temperature. Specifically, the battery temperature after battery aging can be predicted, and the direct cooling simulation results of the battery throughout its life cycle can be predicted, so that the battery can be managed according to the battery temperature prediction results.

[0068] Among them, the neural network model can be a network model based on the convolutional neural network algorithm, which can complete the simulation evaluation under different boundary conditions. The neural network model can learn the changing characteristics of battery data through the convolution layer, compress data and parameters using the pooling layer, and select a suitable activation function to enhance the nonlinear expression ability, and finally output the prediction result through the fully connected layer.

[0069] In this embodiment, a pre-established one-dimensional direct cooling system model of the whole vehicle and a pre-established three-dimensional battery heat transfer model are connected and combined into a joint simulation model. The actual vehicle usage scenario is taken into account through the joint simulation model, thereby improving the simulation accuracy and making the simulated temperature closer to the actual measured value. A charge and discharge cycle simulation test is performed on the battery in the three-dimensional battery heat transfer model according to the joint simulation model. When performing the simulation test, a cyclic direct cooling simulation is performed based on the battery in the actual working state of the whole vehicle. The aging and attenuation of the battery during the use cycle are fully considered, and a charge and discharge cycle test is performed on the battery under direct cooling. The battery data during the simulation test is input into the neural network model to predict the battery temperature. The direct cooling simulation result within the entire life cycle of the battery can be predicted, which can shorten the simulation cycle and save simulation and experimental resources.

[0070] Figure 2 A structural schematic diagram of a one-dimensional direct cooling system model of a whole vehicle provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the one-dimensional direct cooling system model of the whole vehicle may include a simulated compressor, a simulated sensor, a simulated expansion valve, a simulated two-way valve and a simulated evaporator.

[0071] Optionally, indirect heat pump and battery direct cooling can be implemented in the one-dimensional direct cooling system model of the whole vehicle. Specifically, the refrigerant flow rate in the one-dimensional direct cooling system of the whole vehicle can be adjusted, so that the refrigerant flow rate adjusted in the one-dimensional direct cooling system of the whole vehicle can be output. Specifically, the expansion valve opening in the one-dimensional direct cooling system of the whole vehicle can be adjusted, so that the refrigerant flow rate caused by the output adjustment in the one-dimensional direct cooling system of the whole vehicle can be output.

[0072] in, Figure 2 The electric compressor is a simulated compressor, the PT sensor is a simulated sensor, the electronic expansion valve is a simulated expansion valve, the two-way valve is a simulated two-way valve, and the evaporator is also a simulated evaporator.

[0073] Optionally, the simulated compressor can be used to compress the simulated refrigerant flow input into the one-dimensional direct cooling system model of the whole vehicle. The simulated sensor can be used to measure the simulated refrigerant pressure and simulated refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle, so as to determine the simulated refrigerant pressure and simulated refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle. The simulated expansion valve can be used to expand and regulate the refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle. The simulated two-way valve can be used to control the two-way opening or closing of the simulated pipeline in the one-dimensional direct cooling system model of the whole vehicle. The simulated evaporator can be used to evaporate the simulated refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle.

[0074] Optionally, the one-dimensional direct cooling system model of the whole vehicle may also include a simulated one-way valve, which can be used to control the one-way opening or closing of the simulated pipeline in the one-dimensional direct cooling system model of the whole vehicle. The one-dimensional direct cooling system model of the whole vehicle may also include a simulated heat exchanger, which is used to perform heat exchange processing on the simulated flow of the refrigerant in the one-dimensional direct cooling system model of the whole vehicle. The one-dimensional direct cooling system model of the whole vehicle may also include a simulated outdoor condenser and a simulated water-cooled condenser, wherein the simulated outdoor condenser and the simulated water-cooled condenser can be used to cool the one-dimensional direct cooling system model of the whole vehicle.

[0075] Figure 3 A schematic diagram of a three-dimensional battery heat transfer model provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the three-dimensional battery thermal penetration model may include: a simulated direct cooling plate, a simulated battery module, and a simulated refrigerant component. It may also include a simulated upper cover component, a simulated box component, and a simulated bottom guard plate component.

[0076] Among them, the simulated direct cooling plate assembly can be used to cool down the simulated battery assembly during the charging and discharging process. The simulated battery module can be used to simulate battery charging and discharging. The simulated refrigerant assembly can be used to receive the one-dimensional refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle, and perform charge and discharge simulation tests on the simulated battery module according to the received one-dimensional refrigerant flow.

[0077] Optionally, the above S102, performing a charge and discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and measuring and recording the battery data in the simulation test process in real time, may include:

[0078] Optionally, the current one-dimensional refrigerant flow, the current one-dimensional refrigerant pressure and the current one-dimensional refrigerant dryness obtained by running the one-dimensional direct cooling system model of the whole vehicle can be input into the three-dimensional battery heat transfer model, and the current three-dimensional refrigerant flow and the current three-dimensional refrigerant pressure can be obtained by running the three-dimensional battery heat transfer model, wherein the operation of the three-dimensional battery heat transfer model refers to the charging and discharging of the battery in the three-dimensional battery heat transfer model, and recording the current three-dimensional refrigerant pressure, the current one-dimensional refrigerant flow, the current three-dimensional refrigerant inlet temperature, the current three-dimensional refrigerant outlet temperature, the battery voltage, battery current and battery capacity in the current three-dimensional battery heat transfer model, and the current three-dimensional refrigerant flow is input into the one-dimensional direct cooling system model of the whole vehicle.

[0079] Among them, the simulated refrigerant component in the three-dimensional battery heat transfer model includes a simulated inlet and a simulated outlet. The current three-dimensional refrigerant inlet temperature can be measured by the simulated inlet of the simulated refrigerant component, and the current three-dimensional refrigerant outlet temperature can be measured by the simulated outlet of the simulated refrigerant component. During the battery charging and discharging simulation process, the three-dimensional battery heat transfer model generates heat due to electric and thermal coupling, so the inlet temperature and outlet temperature of the simulated refrigerant component may be different.

[0080] Optionally, the current one-dimensional refrigerant flow rate, the current one-dimensional refrigerant pressure, and the current one-dimensional refrigerant dryness obtained by running the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional battery heat transfer model, and the current three-dimensional refrigerant flow rate and the current three-dimensional refrigerant pressure are obtained by running the three-dimensional battery heat transfer model, which may include:

[0081] Optionally, the current one-dimensional refrigerant flow rate and the current one-dimensional refrigerant dryness in the one-dimensional direct cooling system model of the whole vehicle are input to the three-dimensional refrigerant inlet through the one-dimensional refrigerant outlet, and the current three-dimensional refrigerant flow rate and the current three-dimensional refrigerant pressure are output from the three-dimensional refrigerant outlet via the three-dimensional battery heat transfer model. In addition, the current three-dimensional refrigerant flow rate output from the three-dimensional refrigerant outlet is input into the one-dimensional direct cooling system model of the whole vehicle through the one-dimensional refrigerant inlet.

[0082] Optionally, the process of running the above-mentioned vehicle one-dimensional direct cooling system model to obtain the current one-dimensional refrigerant flow rate may include:

[0083] Optionally, the one-dimensional direct cooling system model of the whole vehicle obtains the previous three-dimensional refrigerant flow output by the three-dimensional battery heat transfer model through the one-dimensional refrigerant inlet, and the simulated expansion valve, simulated evaporator and simulated compressor in the one-dimensional system model of the whole vehicle adjust the previous three-dimensional refrigerant flow received in sequence, specifically, the previous three-dimensional refrigerant flow is expanded, evaporated and compressed in sequence, such as Figure 2In the bold line, the three-dimensional refrigerant flow is output from the three-dimensional refrigerant outlet in the three-dimensional electrothermal heat transfer model, and enters the simulated expansion valve for expansion processing, enters the simulated evaporator for evaporation processing, and enters the simulated compressor for compression processing in turn, thereby obtaining the current one-dimensional refrigerant flow and the current one-dimensional refrigerant dryness, and making the current one-dimensional refrigerant pressure the same as the previous one-dimensional refrigerant pressure, that is, the adjustment condition is to make the one-dimensional refrigerant pressure corresponding to the current one-dimensional refrigerant flow and the one-dimensional refrigerant pressure corresponding to the previous one-dimensional refrigerant flow the same. It can be ensured that the one-dimensional refrigerant pressure output from the one-dimensional direct cooling system model of the whole vehicle is the same during each cycle.

[0084] Optionally, in S103, the battery data is input into a neural network model to predict the battery temperature, and obtaining a battery temperature prediction result may include:

[0085] Optionally, the neural network model performs feature extraction on the three-dimensional refrigerant pressure of each current time, the one-dimensional refrigerant flow rate of each current time, the three-dimensional refrigerant inlet temperature of each current time, the three-dimensional refrigerant outlet temperature of each current time, the battery voltage, battery current and battery capacity in the three-dimensional battery heat transfer model of each current time, respectively, to obtain multiple groups of change characteristics, and input each group of change characteristics into the fully connected layer for prediction processing to obtain the battery temperature prediction result.

[0086] Among them, each group of change characteristics may refer to the change characteristics of three-dimensional refrigerant pressure, one-dimensional refrigerant flow, three-dimensional refrigerant inlet temperature, three-dimensional refrigerant outlet temperature, battery voltage and battery current in the cycle simulation test.

[0087] Optionally, the neural network model may include convolution layer 1, batch normalization layer 1, convolution layer 2, batch normalization layer 2, convolution layer 3, batch normalization layer 3 and a fully connected layer. Among them, convolution layer 1 may be a 5*1conv,128 convolution layer, convolution layer 2 may be a 3*1conv,128 convolution layer, and convolution layer 3 may be a 5*1conv,128 convolution layer.

[0088] Optionally, in the process of predicting the battery temperature, the influence of the changing characteristics of the battery data during the simulation process on the battery temperature is comprehensively considered, so that the predicted battery temperature can be more accurate.

[0089] Figure 4 A schematic diagram of a battery direct cooling analysis and processing method provided in an embodiment of the present application, such as Figure 4 As shown, the device comprises:

[0090] A combination module 201 is used to connect and combine a pre-established one-dimensional direct cooling system model of a whole vehicle with a pre-established three-dimensional battery heat transfer model into a joint simulation model, wherein the one-dimensional direct cooling system model of the whole vehicle includes a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, and the three-dimensional battery heat transfer model includes a three-dimensional refrigerant inlet and a three-dimensional refrigerant outlet, wherein the one-dimensional refrigerant outlet is connected to the three-dimensional refrigerant inlet, and the three-dimensional refrigerant outlet is connected to the one-dimensional refrigerant inlet;

[0091] A simulation test module 202, configured to perform a charge-discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and to measure and record battery data during the simulation test in real time;

[0092] The prediction module 203 is used to input the battery data into the neural network model to predict the battery temperature and obtain the battery temperature prediction result.

[0093] Optionally, the one-dimensional direct cooling system model of the whole vehicle includes: a simulated compressor, a simulated sensor, a simulated expansion valve, a simulated two-way valve and a simulated evaporator;

[0094] The simulation compressor is used to compress the simulated flow of the refrigerant input into the one-dimensional direct cooling system model of the whole vehicle;

[0095] The simulation sensor is used to measure the refrigerant simulation pressure and refrigerant simulation flow in the one-dimensional direct cooling system model of the whole vehicle;

[0096] The simulated expansion valve is used to perform expansion regulation on the refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle;

[0097] The simulated two-way valve is used to control the opening or closing of the simulated pipeline in the one-dimensional direct cooling system model of the whole vehicle;

[0098] The simulated evaporator is used to evaporate the simulated flow of the refrigerant in the one-dimensional direct cooling system model of the whole vehicle.

[0099] Optionally, the three-dimensional battery heat transfer model includes: a simulated direct cooling plate, a simulated battery module and a simulated refrigerant component.

[0100] Optionally, the simulation test module 202 is specifically used for:

[0101] The current one-dimensional refrigerant flow, the current one-dimensional refrigerant pressure and the current one-dimensional refrigerant dryness obtained by running the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional battery heat transfer model, and the current three-dimensional refrigerant flow and the current three-dimensional refrigerant pressure are obtained by running the three-dimensional battery heat transfer model. The current three-dimensional refrigerant pressure, the current one-dimensional refrigerant flow, the current three-dimensional refrigerant inlet temperature, the current three-dimensional refrigerant outlet temperature, the battery voltage, battery current and battery capacity in the current three-dimensional battery heat transfer model are recorded, and the current three-dimensional refrigerant flow is input into the one-dimensional direct cooling system model of the whole vehicle.

[0102] Optionally, the simulation test module 202 is specifically used for:

[0103] The current one-dimensional refrigerant flow rate and the current one-dimensional refrigerant dryness in the one-dimensional direct cooling system model of the whole vehicle are input to the three-dimensional refrigerant inlet through the one-dimensional refrigerant outlet, and the current three-dimensional refrigerant flow rate and the current three-dimensional refrigerant pressure are output from the three-dimensional refrigerant outlet via the three-dimensional battery heat transfer model.

[0104] Optionally, the simulation test module 202 is specifically used for:

[0105] The one-dimensional direct cooling system model of the whole vehicle obtains the previous three-dimensional refrigerant flow output by the three-dimensional battery heat transfer model through the one-dimensional refrigerant inlet, and the simulated expansion valve, simulated evaporator and simulated compressor in the one-dimensional direct cooling system model of the whole vehicle adjust the previous three-dimensional refrigerant flow in turn to obtain the current one-dimensional refrigerant flow and the current one-dimensional refrigerant dryness, and make the current one-dimensional refrigerant pressure the same as the previous one-dimensional refrigerant pressure.

[0106] Optionally, the prediction module 203 is specifically used for:

[0107] The neural network model performs feature extraction on the three-dimensional refrigerant pressure of each current time, the one-dimensional refrigerant flow rate of each current time, the three-dimensional refrigerant inlet temperature of each current time, the three-dimensional refrigerant outlet temperature of each current time, the battery voltage, battery current and battery capacity in the three-dimensional battery heat transfer model of each current time, and obtains multiple groups of change features, and inputs each group of change features into the fully connected layer for prediction processing to obtain the battery temperature prediction result.

[0108] Figure 5 This is a structural block diagram of an electronic device 300 provided in an embodiment of the present application. The electronic device may be, for example, the battery direct cooling analysis and processing described in the above embodiment. Figure 5 As shown, the electronic device may include: a processor 301 and a memory 302 .

[0109] Optionally, a bus 303 may also be included, wherein the memory 302 is used to store machine-readable instructions executable by the processor 301 (for example, Figure 4 The execution instructions corresponding to the combination module, simulation test module, and prediction module in the device, etc.), when the electronic device 300 is running, the processor 301 communicates with the memory 302 through the bus 303, and the method steps in the above method embodiment are executed by the processor 301.

[0110] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method steps in the above-mentioned battery direct cooling analysis and processing method embodiment are executed.

[0111] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0112] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccess Memory), disk or optical disk and other media that can store program code.

[0113] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A battery direct cooling analysis and processing method, characterized in that: The method comprises: A pre-established one-dimensional direct cooling system model of a whole vehicle and a pre-established three-dimensional battery heat transfer model are connected and combined into a joint simulation model, wherein the one-dimensional direct cooling system model of the whole vehicle includes a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, and the three-dimensional battery heat transfer model includes a three-dimensional refrigerant inlet and a three-dimensional refrigerant outlet, wherein the one-dimensional refrigerant outlet is connected to the three-dimensional refrigerant inlet, and the three-dimensional refrigerant outlet is connected to the one-dimensional refrigerant inlet; Performing a charge and discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and measuring and recording the battery data during the simulation test in real time; The battery data is input into a neural network model to predict the battery temperature, thereby obtaining a battery temperature prediction result.

2. The battery direct cooling analysis and processing method according to claim 1, characterized in that: The one-dimensional direct cooling system model of the whole vehicle includes: a simulated compressor, a simulated sensor, a simulated expansion valve, a simulated two-way valve and a simulated evaporator; The simulation compressor is used to compress the simulated flow of the refrigerant input into the one-dimensional direct cooling system model of the whole vehicle; The simulation sensor is used to measure the refrigerant simulation pressure and refrigerant simulation flow in the one-dimensional direct cooling system model of the whole vehicle; The simulated expansion valve is used to perform expansion regulation on the refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle; The simulated two-way valve is used to control the opening or closing of the simulated pipeline in the one-dimensional direct cooling system model of the whole vehicle; The simulated evaporator is used to evaporate the simulated flow of the refrigerant in the one-dimensional direct cooling system model of the whole vehicle.

3. The battery direct cooling analysis and processing method according to claim 1, characterized in that: The three-dimensional battery heat transfer model includes: a simulated direct cooling plate, a simulated battery module and a simulated refrigerant component.

4. The battery direct cooling analysis and processing method according to claim 1, characterized in that: The method of performing a charge and discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and measuring and recording battery data in real time during the simulation test, includes: The current one-dimensional refrigerant flow, the current one-dimensional refrigerant pressure and the current one-dimensional refrigerant dryness obtained by running the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional battery heat transfer model, and the current three-dimensional refrigerant flow and the current three-dimensional refrigerant pressure are obtained by running the three-dimensional battery heat transfer model. The current three-dimensional refrigerant pressure, the current one-dimensional refrigerant flow, the current three-dimensional refrigerant inlet temperature, the current three-dimensional refrigerant outlet temperature, the battery voltage, battery current and battery capacity in the current three-dimensional battery heat transfer model are recorded, and the current three-dimensional refrigerant flow is input into the one-dimensional direct cooling system model of the whole vehicle.

5. The battery direct cooling analysis and processing method according to claim 4, characterized in that: The current one-dimensional refrigerant flow, the current one-dimensional refrigerant pressure and the current one-dimensional refrigerant dryness obtained by running the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional battery heat transfer model, and the current three-dimensional refrigerant flow and the current three-dimensional refrigerant pressure are obtained by running the three-dimensional battery heat transfer model, including: The current one-dimensional refrigerant flow rate and the current one-dimensional refrigerant dryness in the one-dimensional direct cooling system model of the whole vehicle are input to the three-dimensional refrigerant inlet through the one-dimensional refrigerant outlet, and the current three-dimensional refrigerant flow rate and the current three-dimensional refrigerant pressure are output from the three-dimensional refrigerant outlet via the three-dimensional battery heat transfer model.

6. The battery direct cooling analysis and processing method according to claim 4, characterized in that: The process of running the one-dimensional direct cooling system model of the whole vehicle to obtain the current one-dimensional refrigerant flow rate includes: The one-dimensional direct cooling system model of the whole vehicle obtains the previous three-dimensional refrigerant flow output by the three-dimensional battery heat transfer model through the one-dimensional refrigerant inlet, and the simulated expansion valve, simulated evaporator and simulated compressor in the one-dimensional direct cooling system model of the whole vehicle adjust the previous three-dimensional refrigerant flow in turn to obtain the current one-dimensional refrigerant flow and the current one-dimensional refrigerant dryness, and make the current one-dimensional refrigerant pressure the same as the previous one-dimensional refrigerant pressure.

7. The battery direct cooling analysis and processing method according to claim 4, characterized in that: The battery data is input into the neural network model to predict the battery temperature, and the battery temperature prediction result is obtained, including: The neural network model performs feature extraction on the three-dimensional refrigerant pressure of each current time, the one-dimensional refrigerant flow rate of each current time, the three-dimensional refrigerant inlet temperature of each current time, the three-dimensional refrigerant outlet temperature of each current time, the battery voltage, battery current and battery capacity in the three-dimensional battery heat transfer model of each current time, and obtains multiple groups of change features, and inputs each group of change features into the fully connected layer for prediction processing to obtain the battery temperature prediction result.

8. A battery direct cooling analysis and processing device, characterized in that: include: A combination module, used to connect and combine a pre-established one-dimensional direct cooling system model of a whole vehicle with a pre-established three-dimensional battery heat transfer model into a joint simulation model, wherein the one-dimensional direct cooling system model of the whole vehicle includes a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, and the three-dimensional battery heat transfer model includes a three-dimensional refrigerant inlet and a three-dimensional refrigerant outlet, wherein the one-dimensional refrigerant outlet is connected to the three-dimensional refrigerant inlet, and the three-dimensional refrigerant outlet is connected to the one-dimensional refrigerant inlet; A simulation test module, used to perform a charge and discharge cycle simulation test on the battery in the three-dimensional battery heat transfer model according to the joint simulation model, and to measure and record the battery data during the simulation test in real time; The prediction module is used to input the battery data into the neural network model to predict the battery temperature and obtain the battery temperature prediction result.

9. An electronic device, characterized in that: It comprises a memory and a processor, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, the steps of the battery direct cooling analysis and processing method described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the battery direct cooling analysis and processing method as described in any one of claims 1 to 7 are executed.

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