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

Abstract

The application provides a battery direct cooling analysis processing method and device, electronic equipment and a storage medium. The method comprises the following steps: connecting and combining a pre-established whole vehicle one-dimensional direct cooling system model and a pre-established three-dimensional battery heat transfer model into a joint simulation model; performing a charge-discharge cycle simulation test on a 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; inputting the battery data into a neural network model to predict the battery temperature and obtain a battery temperature prediction result. The actual use scene is considered in the joint simulation model, the simulation accuracy 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 is shortened, and simulation and test resources are saved.

Description

TECHNICAL FIELD

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

[0002] The working of the power battery in the fast charging and discharging state will cause self-heating, and 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, thereby causing battery safety problems. Therefore, battery thermal management technology is crucial to the service life and safety of the battery. The battery direct cooling scheme is one of the battery thermal management technologies, which combines the battery cooling system with the automobile air conditioning system, and the battery cooling 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 applied in many new energy vehicle models and energy storage stations, and how to design an effective battery direct cooling scheme has attracted widespread attention.

[0003] The existing battery direct cooling analysis method is mainly based on experiments. One is to obtain battery direct cooling test data under typical working conditions by building a heat pump system bench and using a controlled variable parameter scheme, and to optimize the scheme according to the test results. Another is to consider the phase change heat transfer between the direct cooling plate with refrigerant and the battery cell by combining the simulation model with the model of two-phase flow simulation, and to design and optimize the theoretical scheme. These two schemes can provide guidance for direct cooling battery pack scheme design from the perspectives of theoretical analysis and experiment, but the existing battery direct cooling analysis method has errors, resulting in inaccurate analysis results. SUMMARY

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

[0005] To achieve the above purpose, the technical solutions adopted by the embodiments of the present application are as follows:

[0006] In a first aspect, the embodiments of the present application provide a battery direct cooling analysis processing method, which comprises:

[0007] The pre-established vehicle one-dimensional direct cooling system model and the pre-established three-dimensional battery heat transfer model are connected and combined into a joint simulation model, the vehicle one-dimensional direct cooling system model comprises a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, the three-dimensional battery heat transfer model comprises a three-dimensional refrigerant inlet and a three-dimensional refrigerant outlet, the one-dimensional refrigerant outlet is connected with the three-dimensional refrigerant inlet, and the three-dimensional refrigerant outlet is connected with the one-dimensional refrigerant inlet;

[0008] The battery in the three-dimensional battery heat transfer model is subjected to charge-discharge cycle simulation test according to the joint simulation model, and battery data in the simulation test process are measured and recorded in real time;

[0009] The battery data are input into a neural network model to predict the battery temperature, so as to obtain a battery temperature prediction result.

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

[0011] The simulated compressor is configured to compress the simulated refrigerant flow input into the whole-vehicle one-dimensional direct cooling system model.

[0012] The simulated sensor is configured to measure the simulated refrigerant pressure and the simulated refrigerant flow in the whole-vehicle one-dimensional direct cooling system model.

[0013] The simulated expansion valve is configured to expand and adjust the refrigerant flow in the whole-vehicle one-dimensional direct cooling system model.

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

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

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

[0017] Optionally, the battery in the three-dimensional battery heat transfer model is subjected to charge-discharge cycle simulation test according to the joint simulation model, and battery data in the simulation test process are measured and recorded in real time, comprising:

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

[0019] Optionally, the one-dimensional refrigerant flow, the one-dimensional refrigerant pressure and the one-dimensional refrigerant dryness of the current cycle 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 three-dimensional refrigerant flow and the three-dimensional refrigerant pressure of the current cycle are obtained by running the three-dimensional battery heat transfer model, comprising:

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

[0021] Optionally, the process of obtaining the one-dimensional refrigerant flow of the current cycle by running the one-dimensional direct cooling system model of the whole vehicle comprises:

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

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

[0024] Each of the three-dimensional refrigerant pressure of the current cycle, the one-dimensional refrigerant flow of the current cycle, the three-dimensional refrigerant inlet temperature of the current cycle, the three-dimensional refrigerant outlet temperature of the current cycle, the battery voltage, the battery current and the battery capacity in the three-dimensional battery heat transfer model of the current cycle is extracted by the neural network model, to obtain a plurality of groups of change characteristics, and each group of change characteristics is input into a fully connected layer for prediction processing, to obtain the battery temperature prediction result.

[0025] In a second aspect, the embodiments of the present application also provide a battery direct cooling analysis processing device, the device comprising:

[0026] The combination module is configured to combine the pre-established one-dimensional direct cooling system model of the whole vehicle and the pre-established three-dimensional battery heat transfer model into a joint simulation model, the one-dimensional direct cooling system model of the whole vehicle comprises a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, the three-dimensional battery heat transfer model comprises 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;

[0027] a simulation test module, 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 measure and record battery data in real time during the simulation test;

[0028] a prediction module, configured to input the battery data into a neural network model to predict a battery temperature, and obtain a 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 simulated compressor is configured to compress the simulated flow rate of refrigerant input into the one-dimensional direct cooling system model of the whole vehicle.

[0031] The simulated sensor is configured to measure the simulated pressure and simulated flow rate of refrigerant in the one-dimensional direct cooling system model of the whole vehicle.

[0032] The simulated expansion valve is configured to expand and adjust the flow rate of refrigerant in the one-dimensional direct cooling system model of the whole vehicle.

[0033] The simulated two-way valve is configured 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 configured to evaporate the simulated flow rate of 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 assembly.

[0036] Optionally, the simulation test module is specifically configured to:

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

[0038] Optionally, the simulation test module is specifically configured to:

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

[0040] Optionally, the simulation test module is specifically configured to:

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

[0042] Optionally, the prediction module is specifically configured to:

[0043] The three-dimensional refrigerant pressure of each current time, the one-dimensional refrigerant flow 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, the battery current and the battery capacity in the three-dimensional battery heat transfer model of each current time are respectively extracted by the neural network model to obtain a plurality of groups of change characteristics, and each group of change characteristics is input to a full connection layer for prediction processing to obtain the battery temperature prediction result.

[0044] In a third aspect, the embodiments of the present application further provide an electronic device, comprising a processor, a storage medium and a bus, the storage medium stores program instructions executable by the processor, when an application program runs, the processor and the storage medium communicate through the bus, and the processor executes the program instructions to execute the steps of the battery direct cooling analysis processing method in the first aspect.

[0045] In a fourth aspect, the embodiments of the present application further provide a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program reads and executes the steps of the battery direct cooling analysis processing method in the first aspect.

[0046] The beneficial effects of the present application are:

[0047] The battery direct cooling analysis processing method and device, the electronic equipment and the storage medium provided by the application, by connecting and combining the pre-established vehicle one-dimensional direct cooling system model and the pre-established three-dimensional battery heat transfer model into a joint simulation model, the actual use scene is considered by the joint simulation model, the simulation precision is improved, and the simulation temperature is closer to the measured value; according to the joint simulation model, the battery in the three-dimensional battery heat transfer model is subjected to charge and discharge cycle simulation test, then, the battery is subjected to cycle direct cooling simulation based on the actual working state of the vehicle during the simulation test, the aging attenuation problem of the battery in the use cycle is fully considered, and the battery is subjected to charge and discharge cycle test under direct cooling; the battery data in the simulation test process is input into the neural network model to predict the battery temperature, the direct cooling simulation result of the battery in the whole life cycle can be predicted, and then the simulation period can be shortened, and simulation and test resources can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0049] Figure 1 The flowchart of the battery direct cooling analysis processing method provided by the embodiment of the application;

[0050] Figure 2 The structural diagram of the vehicle one-dimensional direct cooling system model provided by the embodiment of the application;

[0051] Figure 3 The structural diagram of the three-dimensional battery heat transfer model provided by the embodiment of the application;

[0052] Figure 4 The device diagram of the battery direct cooling analysis processing method provided by the embodiment of the application;

[0053] Figure 5 The structural block diagram of the electronic equipment provided by the embodiment of the application. DETAILED DESCRIPTION

[0054] In order to make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. It should be understood that the drawings in the present application serve only the purpose of description and illustration, and do not serve to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn according to the actual proportions. The flowcharts used in the present application show the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can not be implemented in sequence, and the steps without logical context relationship can be reversed in sequence or implemented simultaneously. In addition, one or more other operations can be added to the flowcharts or one or more operations can be removed from the flowcharts under the guidance of the content of the present application.

[0055] In addition, the described embodiments are only some 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 herein can be arranged and designed in various different 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 claimed present application, but only represents 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 creative labor fall within 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 presence of the features declared thereafter, but does not exclude the addition of other features.

[0057] Optionally, the battery direct cooling analysis processing method provided by the embodiments of the present application is applied to an electronic device, which can be, for example, a mobile phone, a tablet computer, a notebook computer, a palm computer, a desktop computer, or other terminal devices with computing processing capability and display function, or can also be a server. It can be applied to an application program in a terminal device, for example, an APP (application, mobile phone software) of a mobile phone, an application system on a computer, and the like.

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

[0059] Figure 1 A flowchart of a battery direct cooling analysis processing method provided in the embodiments of the present application is shown in FIG. 1. The execution subject of the method is an electronic device as described above. As shown in FIG. 1, the method comprises the following steps. Figure 1

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

[0061] ​The one-dimensional direct cooling system model of the whole vehicle can include a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, and the three-dimensional battery heat transfer model can 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 condition of the whole vehicle heat pump system. Specifically, it is obtained by one-dimensional simulation according to the existing heat pump test bench containing a battery pack and a cold plate. The three-dimensional battery heat transfer model is obtained by simplifying the three-dimensional model of the battery pack. The battery charging and discharging simulation test operation can be performed through the three-dimensional battery heat transfer model.

[0063] S102, according to the joint simulation model, the battery in the three-dimensional battery heat transfer model is subjected to charging and discharging cycle simulation test, and the battery data in the simulation test process is measured and recorded in real time.

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

[0065] Optionally, it is also considered that the battery charging and discharging cycle also has a certain influence on the battery parameters in the three-dimensional heat transfer model. Therefore, during the cycle charging and discharging test of the battery under direct cooling, the battery data in each charging and discharging process is recorded. Therefore, the finally obtained battery data includes the battery data in multiple charging and discharging processes. For example, after 20 rounds of cycle simulation test of the battery, the battery data in 20 rounds of charging and discharging process can be obtained.

[0066] S103, input the battery data into the neural network model to predict the battery temperature, and obtain the battery temperature prediction result.

[0067] Optionally, after obtaining the battery data in the cycle simulation test process, the battery data is input into the neural network model to predict the battery temperature. Specifically, the battery temperature after aging can be predicted. The direct cooling simulation result in the whole life cycle of the battery can be predicted, so that the battery can be managed according to the battery temperature prediction result.

[0068] The neural network model can be based on a convolutional neural network algorithm, enabling simulation evaluation under different boundary conditions. This model learns the changing characteristics of battery data through convolutional layers, compresses data and parameters using pooling layers, selects appropriate activation functions to enhance nonlinear expressive power, and finally outputs the prediction results through a fully connected layer.

[0069] In this embodiment, a joint simulation model is formed by connecting a pre-established one-dimensional direct cooling system model of the whole vehicle with a pre-established three-dimensional battery heat transfer model. The joint simulation model takes into account the actual vehicle use scenario, which improves the simulation accuracy and makes the simulated temperature closer to the measured value. Based on the joint simulation model, charge-discharge cycle simulation test is performed on the battery in the three-dimensional battery heat transfer model. The simulation test is based on the battery under the actual working state of the whole vehicle, which fully considers the aging and degradation problem of the battery during the use cycle. The battery data in the simulation test is input into the neural network model to predict the battery temperature. The direct cooling simulation results can be predicted throughout the battery's entire life cycle, which can shorten the simulation cycle and save simulation and test resources.

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

[0071] Optionally, the one-dimensional direct cooling system model of the vehicle can realize indirect heat pump and direct battery cooling. Specifically, the refrigerant flow rate in the one-dimensional direct cooling system of the vehicle can be adjusted to achieve the adjusted refrigerant flow rate output by the system. Specifically, the opening degree of the expansion valve in the one-dimensional direct cooling system of the vehicle can be adjusted to achieve the adjusted refrigerant flow rate output by the system.

[0072] in, Figure 2 The electric compressor in the design 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 simulation compressor can be used to compress the refrigerant simulation flow input into the vehicle one-dimensional direct cooling system model. The simulation sensor can be used to measure the refrigerant simulation pressure and the refrigerant simulation flow in the vehicle one-dimensional direct cooling system model, so as to determine the refrigerant simulation pressure and the refrigerant simulation flow in the vehicle one-dimensional direct cooling system model. The simulation expansion valve can be used to expand and adjust the refrigerant flow in the vehicle one-dimensional direct cooling system model. The simulation two-way valve can be used to control the opening or closing of the simulation pipeline in the vehicle one-dimensional direct cooling system model. The simulation evaporator can be used to evaporate the refrigerant simulation flow in the vehicle one-dimensional direct cooling system model.

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

[0075] Figure 3 A structure diagram of a three-dimensional battery heat transfer model provided by an embodiment of the present application is shown in Figure 3 As shown, the three-dimensional battery heat transfer model can include a simulation direct cooling plate, a simulation battery module, and a simulation refrigerant assembly. It can also include a simulation upper cover assembly, a simulation box assembly, and a simulation bottom guard plate assembly.

[0076] The simulation direct cooling plate assembly can be used to cool the simulation battery assembly during charging and discharging. The simulation battery module can be used to simulate battery charging and discharging. The simulation refrigerant assembly can receive one-dimensional refrigerant flow from the vehicle one-dimensional direct cooling system model and perform charging and discharging simulation test on the simulation battery module according to the received one-dimensional refrigerant flow.

[0077] Optionally, the S102 can include:

[0078] Optionally, the one-dimensional refrigerant flow of the current time, the one-dimensional refrigerant pressure of the current time and the one-dimensional refrigerant dryness of the current time 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 three-dimensional refrigerant flow of the current time and the three-dimensional refrigerant pressure of the current time are obtained by running the three-dimensional battery heat transfer model, wherein the running of the three-dimensional battery heat transfer model refers to the battery in the three-dimensional battery heat transfer model being charged and discharged, and the three-dimensional refrigerant pressure of the current time, the one-dimensional refrigerant flow of the current time, the three-dimensional refrigerant inlet temperature of the current time, the three-dimensional refrigerant outlet temperature of the current time, the battery voltage, the battery current and the battery capacity in the three-dimensional battery heat transfer model of the current time are recorded, and the three-dimensional refrigerant flow of the current time is input into the one-dimensional direct cooling system model of the whole vehicle.

[0079] Wherein, the simulation refrigerant assembly in the three-dimensional battery heat transfer model comprises a simulation inlet and a simulation outlet, the three-dimensional refrigerant inlet temperature of the current time can be measured at the simulation inlet of the simulation refrigerant assembly, and the three-dimensional refrigerant outlet temperature of the current time can be measured at the simulation outlet of the simulation refrigerant assembly, and the inlet temperature and the outlet temperature of the simulation refrigerant assembly can be different during the battery charging and discharging simulation process of the three-dimensional battery heat transfer model.

[0080] Optionally, the above-mentioned inputting the one-dimensional refrigerant flow of the current time, the one-dimensional refrigerant pressure of the current time and the one-dimensional refrigerant dryness of the current time obtained by running the one-dimensional direct cooling system model of the whole vehicle into the three-dimensional battery heat transfer model, and obtaining the three-dimensional refrigerant flow of the current time and the three-dimensional refrigerant pressure of the current time by running the three-dimensional battery heat transfer model can comprise:

[0081] Optionally, the one-dimensional refrigerant flow of the current time and the one-dimensional refrigerant dryness of the current time in the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional refrigerant inlet through the one-dimensional refrigerant outlet, and the three-dimensional refrigerant flow of the current time and the three-dimensional refrigerant pressure of the current time are output from the three-dimensional refrigerant outlet by the three-dimensional battery heat transfer model. And the three-dimensional refrigerant flow of the current time output by 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 obtaining the one-dimensional refrigerant flow of the current time by running the one-dimensional direct cooling system model of the whole vehicle can comprise:

[0083] Optionally, the one-dimensional direct cooling system model of the whole vehicle obtains the three-dimensional refrigerant flow of the previous time output by the three-dimensional battery heat transfer model through the one-dimensional refrigerant inlet, and sequentially adjusts the received three-dimensional refrigerant flow of the previous time by the simulation expansion valve, the simulation evaporator and the simulation compressor in the one-dimensional direct cooling system model of the whole vehicle. Specifically, the three-dimensional refrigerant flow of the previous time is sequentially expanded, evaporated and compressed, such as Figure 2The three-dimensional refrigerant flow in the bold line in the figure is output from the three-dimensional refrigerant outlet in the three-dimensional electric heat transfer model, sequentially enters the simulated expansion valve for expansion treatment, enters the simulated evaporator for evaporation treatment, and enters the simulated compressor for compression treatment, so as to obtain the one-dimensional refrigerant flow of the current time and the one-dimensional refrigerant dryness of the current time, and make the one-dimensional refrigerant pressure of the current time the same as the one-dimensional refrigerant pressure of the previous time, that is, the condition of adjustment is that the one-dimensional refrigerant pressure corresponding to the obtained one-dimensional refrigerant flow of the current time is the same as the one-dimensional refrigerant pressure corresponding to the one-dimensional refrigerant flow of the previous time. Then it can be guaranteed that the one-dimensional refrigerant pressure output from the one-dimensional direct cooling system model of the whole vehicle in each cycle is the same.

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

[0085] Optionally, the neural network model is used to extract features from the three-dimensional refrigerant pressure, the one-dimensional refrigerant flow, the three-dimensional refrigerant inlet temperature, the three-dimensional refrigerant outlet temperature, the battery voltage, the battery current and the battery capacity in the three-dimensional battery heat transfer model of each current time, respectively, to obtain a plurality of groups of change features, and input each group of change features into the full connection layer for prediction processing to obtain the battery temperature prediction result.

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

[0087] Optionally, the neural network model can include a convolution layer 1, a batch normalization layer 1, a convolution layer 2, a batch normalization layer 2, a convolution layer 3, a batch normalization layer 3 and a full connection layer. The convolution layer 1 can be a 5*1conv,128 convolution layer, the convolution layer 2 can be a 3*1conv,128 convolution layer, and the convolution layer 3 can be a 5*1conv,128 convolution layer.

[0088] Optionally, in the process of predicting the battery temperature, the influence of the change features of the battery data in the simulation process on the battery temperature is comprehensively considered, so that the predicted battery temperature is more accurate.

[0089] Figure 4 A device schematic diagram of a battery direct cooling analysis processing method provided by the embodiment of the application is shown in Figure 4 The device includes:

[0090] The combination module 201 is configured to combine a pre-established one-dimensional direct cooling system model of a whole vehicle and a pre-established three-dimensional battery heat transfer model into a joint simulation model, the one-dimensional direct cooling system model of the whole vehicle comprises a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet, the three-dimensional battery heat transfer model comprises 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;

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

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

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

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

[0095] The simulated sensor is configured to measure a simulated refrigerant pressure and a simulated refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle.

[0096] The simulated expansion valve is configured to expand and adjust a refrigerant flow in the one-dimensional direct cooling system model of the whole vehicle.

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

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

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

[0100] Optionally, the simulation test module 202 is specifically configured to:

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

[0102] Optionally, the simulation test module 202 is specifically configured to:

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

[0104] Optionally, the simulation test module 202 is specifically configured to:

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

[0106] Optionally, the prediction module 203 is specifically configured to:

[0107] The three-dimensional refrigerant pressure of each current time, the one-dimensional refrigerant flow 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, the battery current and the battery capacity in the three-dimensional battery heat transfer model of each current time are respectively extracted by the neural network model to obtain a plurality of groups of change features, and each group of change features is input into a full connection layer for prediction processing to obtain the battery temperature prediction result.

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

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

[0110] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to execute the method steps in the above battery direct cooling analysis processing method embodiments.

[0111] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the above-described system and device can refer to the corresponding process in the method embodiments, which will not be described herein. In the several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other means. The device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some communication interface, device or module, which can be electrical, mechanical or other forms.

[0112] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or say the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of software products, and the computer software products are stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.​

[0113] The above embodiments are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application.

Claims

1. A method for direct cooling analysis and processing of batteries, characterized in that, The method includes: A pre-established one-dimensional direct cooling system model of the whole vehicle is combined with a pre-established three-dimensional battery heat transfer model to form a joint simulation model. The one-dimensional direct cooling system model of the whole vehicle includes a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet. The three-dimensional battery heat transfer model includes 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. The battery in the three-dimensional battery heat transfer model is subjected to charge-discharge cycle simulation test based on the joint simulation model, and the battery data during the simulation test is measured and recorded in real time. The battery data is input into a neural network model to predict the battery temperature, and the battery temperature prediction result is obtained. The step of performing charge-discharge cycle simulation tests on the battery in the three-dimensional battery heat transfer model based on the joint simulation model, and measuring and recording the battery data in real time during the simulation test, includes: The current one-dimensional refrigerant flow rate, current one-dimensional refrigerant pressure, and current one-dimensional refrigerant dryness obtained from running the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional battery heat transfer model. The current three-dimensional refrigerant flow rate and current three-dimensional refrigerant pressure are obtained through running the three-dimensional battery heat transfer model. The current three-dimensional refrigerant pressure, current one-dimensional refrigerant flow rate, current three-dimensional refrigerant inlet temperature, current three-dimensional refrigerant outlet temperature, battery voltage, battery current, and battery capacity in the current three-dimensional battery heat transfer model are recorded. The current three-dimensional refrigerant flow rate is then input into the one-dimensional direct cooling system model of the whole vehicle. The step of inputting the battery data into a neural network model to predict the battery temperature and obtain the battery temperature prediction result includes: The neural network model extracts features from the current three-dimensional refrigerant pressure, the current one-dimensional refrigerant flow rate, 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, respectively, to obtain multiple sets of changing features. Each set of changing features is then input into a fully connected layer for prediction processing to obtain the 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 simulated compressor is used to compress the simulated refrigerant flow rate input to the one-dimensional direct cooling system model of the vehicle. The simulated sensor is used to measure the simulated refrigerant pressure and simulated refrigerant flow rate in the one-dimensional direct cooling system model of the vehicle. The simulated expansion valve is used to expand and regulate the refrigerant flow in the one-dimensional direct cooling system model of the 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 refrigerant flow rate in the one-dimensional direct cooling system model of the 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 assembly.

4. The battery direct cooling analysis and processing method according to claim 1, characterized in that, The step of inputting the current one-dimensional refrigerant flow rate, current one-dimensional refrigerant pressure, and current one-dimensional refrigerant dryness obtained from running the one-dimensional direct cooling system model of the whole vehicle into the three-dimensional battery heat transfer model, and obtaining the current three-dimensional refrigerant flow rate and current three-dimensional refrigerant pressure through running the three-dimensional battery heat transfer model, includes: The current one-dimensional refrigerant flow rate and 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 current three-dimensional refrigerant pressure are output from the three-dimensional refrigerant outlet through the three-dimensional battery heat transfer model.

5. The battery direct cooling analysis and processing method according to claim 1, characterized in that, The process of obtaining the current one-dimensional refrigerant flow rate by running the one-dimensional direct cooling system model of the whole vehicle includes: The one-dimensional direct cooling system model of the vehicle obtains the previous three-dimensional refrigerant flow rate output by the three-dimensional battery heat transfer model through the one-dimensional refrigerant inlet. The simulated expansion valve, simulated evaporator and simulated compressor in the one-dimensional direct cooling system model of the vehicle adjust the previous three-dimensional refrigerant flow rate in sequence to obtain the current one-dimensional refrigerant flow rate and the current one-dimensional refrigerant dryness, and make the current one-dimensional refrigerant pressure the same as the previous one-dimensional refrigerant pressure.

6. A battery direct cooling analysis and processing device, characterized in that, include: The combination module is used to 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. The one-dimensional direct cooling system model of the whole vehicle includes a one-dimensional refrigerant inlet and a one-dimensional refrigerant outlet. The three-dimensional battery heat transfer model includes 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. The simulation test module is used to perform charge-discharge cycle simulation tests on the battery in the three-dimensional battery heat transfer model based on the joint simulation model, and to measure and record the battery data in real time during the simulation test process. The prediction module is used to input the battery data into a neural network model to predict the battery temperature and obtain the battery temperature prediction result. The simulation testing module is specifically used for: The current one-dimensional refrigerant flow rate, current one-dimensional refrigerant pressure, and current one-dimensional refrigerant dryness obtained from running the one-dimensional direct cooling system model of the whole vehicle are input into the three-dimensional battery heat transfer model. The current three-dimensional refrigerant flow rate and current three-dimensional refrigerant pressure are obtained through running the three-dimensional battery heat transfer model. The current three-dimensional refrigerant pressure, current one-dimensional refrigerant flow rate, current three-dimensional refrigerant inlet temperature, current three-dimensional refrigerant outlet temperature, battery voltage, battery current, and battery capacity in the current three-dimensional battery heat transfer model are recorded. The current three-dimensional refrigerant flow rate is then input into the one-dimensional direct cooling system model of the whole vehicle. The prediction module is specifically used for: The neural network model extracts features from the current three-dimensional refrigerant pressure, the current one-dimensional refrigerant flow rate, 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, respectively, to obtain multiple sets of changing features. Each set of changing features is then input into a fully connected layer for prediction processing to obtain the battery temperature prediction result.

7. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program executable by the processor, and the processor executes the computer program to implement the steps of the battery direct cooling analysis and processing method according to any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the battery direct cooling analysis processing method as described in any one of claims 1-5.

Images