Detection method of battery device, product model of battery device and test system

Abstract

The invention provides a detection method of a battery device, a product model of the battery device and a test system, relates to the technical field of battery packs, and is used for solving the problem that the heat exchange capability of a direct cooling plate cannot be tested in the prior art. The detection method comprises the following steps: acquiring a simulation model of a to-be-detected battery device; the to-be-detected battery device comprises a battery cell and a direct cooling plate; the simulation model comprises a simulation model of the battery cell and a simulation model of the direct cooling plate. And based on the simulation model of the battery cell, simulating a heating scene of the battery cell and adjusting refrigerant parameters of the simulation model of the direct cooling plate so as to obtain simulation heat dissipation performance parameters of the direct cooling plate to the battery cell in the simulation environment. The detection method can be used for testing the heat exchange performance of the direct cooling plate.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to a detection method for a battery device, a product model of a battery device, and a testing system. Background Art

[0002] With the improvement of people's living standards, cars have gradually become a necessary means of transportation for most families. Among them, electric vehicles have gradually occupied the main automobile market with their advantages of no pollution and energy saving.

[0003] The battery pack is an important component of electric vehicles. It can provide a source of kinetic energy for electric vehicles. The battery pack uses its electrical energy to drive the drive mechanism, which in turn drives the vehicle. The performance of the battery pack will directly affect the safety, power and economy of the entire vehicle. As the battery charging speed continues to increase, the heat generated by the battery pack is also gradually increasing, further increasing the demand for battery heat dissipation.

[0004] The direct cooling plate is a component in the battery pack that dissipates heat for the battery. The heat dissipation performance of the direct cooling plate directly affects the overall performance of the battery pack. Therefore, it is necessary to test the heat dissipation performance of the direct cooling plate. Generally, simulation is used to simulate the flow resistance and flow distribution of the refrigerant on a separate direct cooling plate, but it is impossible to directly test the heat exchange capacity between the direct cooling plate and the battery, and the test results are not comprehensive enough. Summary of the invention

[0005] The purpose of the present application is to provide a battery device detection method, a battery device product model and a test system, which are used to solve the problem that the heat exchange capacity of a direct cooling plate cannot be tested in the prior art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: In the first aspect, the embodiment of the present application provides a method for detecting a battery device, the method comprising the steps of: obtaining a simulation model of the battery device to be detected; the battery device to be detected comprises a battery cell and a direct cooling plate; the simulation model comprises a simulation model of the battery cell and a simulation model of the direct cooling plate. Based on the simulation model of the battery cell, the heating scene of the battery cell is simulated and the refrigerant parameters of the simulation model of the direct cooling plate are adjusted to obtain the simulated heat dissipation performance parameters of the simulation model of the direct cooling plate for the battery cell under the simulation environment.

[0007] According to the above-mentioned technical means, the detection method of the battery device provided in the embodiment of the present application, since the simulation model includes the simulation model of the battery cell and the simulation model of the direct cooling plate, the heat exchange effect between the simulation model of the direct cooling plate and the simulation model of the battery cell can be tested. By simulating the heating scene of the battery cell and adjusting the refrigerant parameters of the simulation model of the direct cooling plate, the heat exchange efficiency between the simulation model of the direct cooling plate and the simulation model of the battery cell can be detected in a simulation environment. At the same time, the simulation model of the direct cooling plate can also be used to simulate the flow resistance and flow distribution of the refrigerant.

[0008] In a possible implementation, the simulated heat dissipation performance parameters include at least one of the following: heat exchange capacity of the simulation model of the direct cooling plate, temperature distribution of the simulation model of the direct cooling plate, component distribution of the refrigerant in the simulation model of the direct cooling plate, and temperature distribution of the refrigerant in the simulation model of the direct cooling plate.

[0009] According to the above-mentioned technical means, when conducting simulation tests, software can be used for simulation to test the heat exchange capacity of the simulation model of the direct cooling plate, the temperature distribution of the simulation model of the direct cooling plate, the component distribution of the refrigerant in the simulation model of the direct cooling plate, and the temperature distribution of the refrigerant in the simulation model of the direct cooling plate, so that the test results of the performance of the simulation model of the direct cooling plate are more comprehensive.

[0010] In a possible implementation, adjusting the refrigerant parameters of the simulation model of the direct cooling plate includes: adjusting the refrigerant parameters of the simulation model of the direct cooling plate based on a preset refrigerant control strategy. The preset refrigerant control strategy includes circulation or disconnection of the refrigerant in the direct cooling plate, a refrigerant flow control strategy, and a refrigerant flow rate control strategy.

[0011] According to the above technical means, by controlling the circulation or disconnection of the refrigerant, the flow rate of the refrigerant and the flow rate of the refrigerant in the simulation model of the direct cooling plate, the heat exchange performance of the simulation model of the direct cooling plate can be tested under different conditions, and the direct cooling plate can be comprehensively tested.

[0012] In a possible implementation, adjusting the refrigerant parameters of the simulation model of the direct cooling plate includes: adjusting the refrigerant parameters of the simulation model of the direct cooling plate by functional coupling assignment of physical parameters of the refrigerant in the simulation model of the direct cooling plate. The physical parameters include at least one of the following: gas-liquid component ratio, specific heat, and dynamic viscosity.

[0013] According to the above technical means, when conducting simulation tests, the physical parameters can be adjusted by means of function coupling assignment, which can improve the test efficiency, form correlations between various factors, and better simulate the relationship between various factors in real situations.

[0014] In a possible implementation, the method further includes: testing a product model of the battery device to be tested, obtaining actual heat dissipation performance parameters of the direct cooling plate to the battery cell in an actual scenario, and the performance parameters of the product model are consistent with the parameters of the simulation model. If the difference between the actual heat dissipation performance parameters and the simulated heat dissipation performance parameters is within a preset range, it is determined that the simulated heat dissipation performance parameters are normal.

[0015] According to the above technical means, it can be shown that the results of the test using the above simulation method are consistent with the results of the test in reality, and the results of the simulation test are reliable. In this way, simulation software testing can be directly used to replace physical testing, reducing the cost of physical production, reducing the cost of testing, and making the operation more convenient.

[0016] In a second aspect, an embodiment of the present application provides a product model of a battery device, which is made according to the simulation model in any battery device detection method in the first aspect. The product model includes a direct cooling plate model and a battery cell model.

[0017] According to the above technical means, during the test process, the direct cooling plate model and the battery cell model can be used to test the heat exchange efficiency between the direct cooling plate model and the battery cell model.

[0018] In a possible implementation, the battery cell model includes a simulated battery cell and a heating device. The heating device is used to heat the simulated battery cell to simulate a heating scenario of the battery cell.

[0019] According to the above technical means, the simulated battery cell can be heated by a heating device, thereby simulating the situation in which the actual battery cell generates heat during operation.

[0020] In a possible implementation, the simulated battery cell includes a first battery cell and a second battery cell. The second battery cell is stacked with the first battery cell. The heating device is disposed between the first battery cell and the second battery cell along the stacking direction of the first battery cell and the second battery cell.

[0021] According to the above technical means, the heating device can heat the first battery cell and the second battery cell on both sides, and the first battery cell and the second battery cell can better simulate the situation where the battery generates heat in all directions when it is running.

[0022] In a third aspect, an embodiment of the present application provides a testing system, comprising a product model of the battery device according to any one of the second aspects.

[0023] Since the test system provided in the embodiment of the present application includes a product model of the battery device of any one of the second aspects, it can solve the same technical problems as the above-mentioned product models and achieve the same technical effects, which will not be described in detail here.

[0024] In a possible implementation, the direct cooling plate model includes a fluid domain. The test system further includes a refrigeration system. The refrigeration system is connected to the fluid domain and is used to circulate a refrigerant toward the fluid domain.

[0025] According to the above technical means, the refrigerant can be circulated into the fluid domain through the refrigeration system, so as to test the performance of the direct cooling plate model during refrigeration.

[0026] In a possible implementation, the test system further includes a control detection system, which is used to control the flow of the refrigerant in the refrigeration system according to the temperature changes of the battery core model and the direct cooling plate model.

[0027] According to the above technical means, by controlling the detection system, the flow of the refrigerant can be adjusted according to the temperature changes of the battery cell model and the direct cooling plate model, so as to better test the direct cooling plate model.

[0028] In a possible implementation, the control and detection system includes a control system and a detection system. The control system is connected to the refrigeration system and is used to control the flow of refrigerant in the refrigeration system. The detection system is electrically connected to the control system and is used to detect temperature changes of the battery cell model and the direct cooling plate model.

[0029] According to the above technical means, the temperature change of the battery cell model and the direct cooling plate model can be detected by the detection system. The detection system can transmit the detection results to the control system, and the control system can control the flow of the refrigerant in the refrigeration system according to the detection results of the detection system.

[0030] In a possible implementation, the detection system includes a first temperature sensor and a second temperature sensor. The first temperature sensor is electrically connected to the control system. The first temperature sensor is used to detect the temperature of the battery core model. The second temperature sensor is electrically connected to the control system. The second temperature sensor is used to detect the temperature of the direct cooling plate model.

[0031] According to the above technical means, the temperatures of the battery core model and the direct cooling plate model can be detected by the first temperature sensor and the second temperature sensor.

[0032] In a possible embodiment, the fluid domain has an inlet and an outlet. The refrigeration system includes an electronic expansion valve, a compressor, a condenser, and a refrigerant detection assembly. One end of the electronic expansion valve is connected to the inlet of the fluid domain. One end of the compressor is connected to the outlet of the fluid domain. One end of the condenser is connected to the compressor, and the other end is connected to the other end of the electronic expansion valve. The refrigerant detection assembly is used to detect the flow of the refrigerant.

[0033] According to the above technical means, the compressor, condenser, electronic expansion valve and fluid domain can form a circulation system, so that the refrigerant can be circulated and utilized. The refrigerant flow can be detected by the refrigerant detection component, so that the control system can make corresponding adjustments according to the refrigerant flow to ensure that the refrigerant can flow in the desired form.

[0034] In a possible implementation, the refrigerant detection assembly includes a third temperature sensor. The third temperature sensor is disposed between the electronic expansion valve and the inlet.

[0035] According to the above technical means, the temperature of the refrigerant entering the fluid domain can be detected by the third temperature sensor, so that the control system can make corresponding adjustments according to the temperature of the refrigerant to ensure that the refrigerant can flow at the desired temperature.

[0036] In a possible implementation, the refrigerant detection assembly includes a fourth temperature sensor. The fourth temperature sensor is arranged between the compressor and the outlet.

[0037] According to the above technical means, the temperature of the refrigerant flowing out of the fluid domain can be detected by the fourth temperature sensor, so that the control system can make corresponding adjustments according to the temperature of the refrigerant to ensure that the refrigerant can flow at a desired temperature.

[0038] In a possible implementation, the refrigerant detection assembly includes a flow sensor. The flow sensor is arranged between the electronic expansion valve and the inlet.

[0039] According to the above technical means, the flow rate of the refrigerant entering the fluid domain can be detected by a flow sensor, so that the control system can make corresponding adjustments according to the flow rate of the refrigerant to ensure that the refrigerant can flow at a desired flow rate.

[0040] In a possible implementation, the refrigerant detection assembly includes a first pressure sensor. The first pressure sensor is disposed between the compressor and the outlet.

[0041] According to the above technical means, the pressure of the refrigerant flowing out of the fluid domain can be detected by the first pressure sensor, so that the control system can make corresponding adjustments according to the pressure of the refrigerant to ensure that the refrigerant can flow at a desired pressure.

[0042] In a possible implementation, the refrigerant detection assembly includes a second pressure sensor. The second pressure sensor is disposed between the condenser and the electronic expansion valve.

[0043] According to the above technical means, the pressure of the refrigerant that will flow into the fluid domain can be detected by the second pressure sensor, so that the control system can make corresponding adjustments according to the pressure of the refrigerant to ensure that the refrigerant can flow at the desired pressure.

[0044] In a possible implementation, the refrigerant detection assembly further includes a third pressure sensor. The third pressure sensor is disposed between the electronic expansion valve and the inlet.

[0045] According to the above technical means, the pressure of the refrigerant passing through the electronic expansion valve can be detected by the third pressure sensor, so that the control system can make corresponding adjustments according to the pressure of the refrigerant to ensure that the refrigerant can flow at the desired pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 One of the flow charts of a battery device detection method provided in an embodiment of the present application; Figure 2 A second flow chart of a battery device detection method provided in an embodiment of the present application; Figure 3 A schematic diagram of a product model of a battery device provided in an embodiment of the present application; Figure 4 for Figure 3 a side view of a production model of the battery device shown; Figure 5 A schematic diagram of the structure of a battery cell model provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a direct cooling plate provided in an embodiment of the present application; Figure 7 A schematic structural diagram of a direct cooling plate model provided in an embodiment of the present application; Figure 8 for Figure 3 A top view of a product model of the battery device shown; Fig. 9 for Figure 3 A top view of a partial structure of a product model of the battery device shown; Fig.10 A structural block diagram of a test system provided in an embodiment of the present application; Fig.11 A structural block diagram of a control system, a detection system and a refrigeration system provided in an embodiment of the present application; Fig.12 A structural block diagram of a refrigerant detection component and a signal collector provided in an embodiment of the present application.

[0047] Reference numerals: 100-product model; 10-direct cooling plate model; 101-fluid domain; 102-inlet; 103-outlet; 20-cell model; 21-simulated cell; 211-first cell; 212-second cell; 22-heating device; 30-upper cover; 40-frame; 50-lower cover; 61-first sealant; 62-second sealant; 63-third sealant; 70-thermal conductive glue; 200-direct cooling plate; 201-flow channel; 1000-test system; 300-refrigeration system; 310-electronic expansion valve; 320-compressor ;330-condenser;340-refrigerant detection assembly;341-third temperature sensor;342-fourth temperature sensor;343-flow sensor;344-first pressure sensor;345-second pressure sensor;346-third pressure sensor;350-liquid storage tank;360-check valve;400-control detection system;410-control system;411-controller;412-signal collector;420-detection system;421-first temperature sensor;422-second temperature sensor;500-power supply. DETAILED DESCRIPTION

[0048] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0050] The present application embodiment provides a method for detecting a battery device, such as Figure 1 As shown, the detection method includes steps S100-S200.

[0051] S100: Obtain a simulation model of the battery device to be tested. The battery device to be tested includes a battery cell and a direct cooling plate, and the simulation model includes a simulation model of the battery cell and a simulation model of the direct cooling plate. Based on this, when using simulation software for modeling, the established simulation model includes a simulation model of the battery cell and a simulation model of the direct cooling plate. In this way, the heat exchange effect between the simulation model of the direct cooling plate and the simulation model of the battery cell can be tested.

[0052] S200: Based on the simulation model of the battery cell, simulate the heating scene of the battery cell and adjust the refrigerant parameters of the simulation model of the direct cooling plate to obtain the simulated heat dissipation performance parameters of the simulation model of the direct cooling plate for the battery cell under the simulation environment. Therefore, by simulating the heating scene of the battery cell and adjusting the refrigerant parameters of the simulation model of the direct cooling plate, the heat exchange efficiency between the simulation model of the direct cooling plate and the simulation model of the battery cell can be detected under the simulation environment. At the same time, the simulation model of the direct cooling plate can also be used to simulate the flow resistance and flow distribution of the refrigerant.

[0053] Based on this, the detection method of the battery device provided in the embodiment of the present application, since the simulation model includes the simulation model of the battery cell and the simulation model of the direct cooling plate, the heat exchange effect between the simulation model of the direct cooling plate and the simulation model of the battery cell can be tested. By simulating the heating scene of the battery cell and adjusting the refrigerant parameters of the simulation model of the direct cooling plate, the heat exchange efficiency between the simulation model of the direct cooling plate and the simulation model of the battery cell can be detected in a simulation environment. At the same time, the simulation model of the direct cooling plate can also be used to simulate the flow resistance and flow distribution of the refrigerant.

[0054] In some embodiments, the simulated heat dissipation performance parameter includes at least one of the following: the heat exchange capacity of the simulation model of the direct cooling plate, the temperature distribution of the simulation model of the direct cooling plate, the component distribution of the refrigerant in the simulation model of the direct cooling plate, and the temperature distribution of the refrigerant in the simulation model of the direct cooling plate. Based on the above scheme, when performing simulation testing, software can be used for simulation to test the heat exchange capacity of the simulation model of the direct cooling plate, the temperature distribution of the simulation model of the direct cooling plate, the component distribution of the refrigerant in the simulation model of the direct cooling plate, and the temperature distribution of the refrigerant in the simulation model of the direct cooling plate, so that the test results for the performance of the simulation model of the direct cooling plate are more comprehensive.

[0055] It is understandable that the specific composition of the simulated heat dissipation performance parameter can be selected according to actual conditions. Exemplarily, the simulated heat dissipation performance parameter may include one or more of the heat exchange capacity of the simulation model of the direct cooling plate, the temperature distribution of the simulation model of the direct cooling plate, the component distribution of the refrigerant in the simulation model of the direct cooling plate, and the temperature distribution of the refrigerant in the simulation model of the direct cooling plate.

[0056] In some embodiments, adjusting the refrigerant parameters of the simulation model of the direct cooling plate includes: adjusting the refrigerant parameters of the simulation model of the direct cooling plate based on a preset refrigerant control strategy. The preset refrigerant control strategy includes the circulation or disconnection of the refrigerant in the direct cooling plate, the refrigerant flow control strategy, and the refrigerant flow rate control strategy. Thus, by controlling the circulation or disconnection of the refrigerant in the simulation model of the direct cooling plate, the refrigerant flow rate, and the refrigerant flow rate, the heat exchange performance of the simulation model of the direct cooling plate can be tested under different conditions, and the direct cooling plate can be comprehensively tested.

[0057] In some embodiments, adjusting the refrigerant parameters of the simulation model of the direct cooling plate includes: adjusting the refrigerant parameters of the simulation model of the direct cooling plate by functional coupling assignment of physical parameters of the refrigerant in the simulation model of the direct cooling plate. The physical parameters include at least one of the following: gas-liquid component ratio, specific heat, and dynamic viscosity. Therefore, when performing simulation tests, the physical parameters can be adjusted by functional coupling assignment, which can improve the test efficiency, and can also form a correlation between various factors to better simulate the relationship between various factors in real situations.

[0058] In some embodiments, Figure 2 As shown, the method further includes steps S300-S400.

[0059] S300: Test the product model of the battery device to be tested to obtain the actual heat dissipation performance parameters of the direct cooling plate to the battery cell in the actual scene. The performance parameters of the product model are consistent with the parameters of the simulation model. Based on this step, the test results of the actual performance of the product model matching the simulation model can be obtained.

[0060] S400: If the difference between the actual heat dissipation performance parameter and the simulated heat dissipation performance parameter is within the preset range, it is determined that the simulated heat dissipation performance parameter is normal. Based on this step, it can be explained that the result of the test using the above simulation method is consistent with the result of the test in reality, and the result of the simulation test is reliable. In this way, the simulation software test can be directly used to replace the physical test, which reduces the physical production cost, reduces the testing cost, and is more convenient to operate.

[0061] In addition, the embodiment of the present application provides a product model of a battery device. The product model is made according to the simulation model in the above-mentioned battery device detection method. Figure 3 As shown, the product model 100 includes a direct cooling plate model 10 and a battery core model 20. Therefore, during the test, the direct cooling plate model 10 and the battery core model 20 can be used to test the heat exchange efficiency between the direct cooling plate model 10 and the battery core model 20.

[0062] In addition, the product model 100 provided in the embodiment of the present application may also include other components in the battery pack to fully simulate the battery pack. Figure 3 As shown, the product model 100 may further include an upper cover 30, a frame 40 and a lower cover 50. The upper cover 30, the frame 40 and the lower cover 50 may form a complete space, and the direct cooling plate model 10 and the battery cell model 20 may be located in the above space to play a certain protective role.

[0063] At the same time, in order to ensure a good sealing effect, such as Figure 3 and Figure 4 As shown, the product model 100 may further include a first sealant 61 , a second sealant 62 , and a third sealant 63 .

[0064] Among them, Figure 4 As shown, the first sealant 61 is located between the upper cover 30 and the frame 40, and can be used to achieve sealing between the upper cover 30 and the frame 40 to ensure a sealing effect therebetween.

[0065] The second sealant 62 may be located between the frame 40 and the direct cooling plate model 10 , and may be used to achieve sealing between the frame 40 and the direct cooling plate model 10 , thereby ensuring a sealing effect therebetween.

[0066] The third sealant 63 may be located between the frame 40 and the lower cover 50 , and may be used to achieve sealing between the frame 40 and the lower cover 50 , thereby ensuring a sealing effect therebetween.

[0067] In addition, if Figure 4 As shown, the product model 100 may further include a thermally conductive adhesive 70. The thermally conductive adhesive 70 may be located between the direct cooling plate model 10 and the battery cell model 20, and may help conduct heat, so that the heat of the battery cell model 20 may be better transferred to the direct cooling plate model 10, thereby improving the heat dissipation efficiency.

[0068] In some embodiments, Figure 5 As shown, the battery cell model 20 includes a simulated battery cell 21 and a heating device 22. The heating device 22 is used to heat the simulated battery cell 21 to simulate the heating scene of the battery cell. Thus, the simulated battery cell 21 can be heated by the heating device 22, thereby simulating the situation where the actual battery cell generates heat during operation.

[0069] In some embodiments, Figure 5As shown, the simulated battery cell 21 includes a first battery cell 211 and a second battery cell 212. The second battery cell 212 is stacked with the first battery cell 211. Wherein, along the stacking direction of the first battery cell 211 and the second battery cell 212. The heating device 22 is arranged between the first battery cell 211 and the second battery cell 212. In this way, the heating device 22 can heat the first battery cell 211 and the second battery cell 212 on both sides, and the first battery cell 211 and the second battery cell 212 can better simulate the situation of all-round heating when the battery is running.

[0070] Of course, in other embodiments, the simulated battery cell 21 may also only include the first battery cell 211 , and the specific structure may be designed according to actual conditions.

[0071] The direct cooling plate model 10 provided in the embodiment of the present application may be similar to the actual cooling plate structure. Figure 6 and Figure 7 As shown, the direct cooling plate 200 is formed with a flow channel 201. Correspondingly, the direct cooling plate model 10 has a fluid domain 101 (i.e., equivalent to the flow channel 201 of the direct cooling plate 200). The fluid domain 101 can be used to circulate the cooling liquid. In addition, in order to facilitate the connection of external pipes, as shown in FIG. Figure 8 and Fig. 9 As shown, the inlet 102 and the outlet 103 of the fluid domain 101 may extend out of a portion of the upper cover 30 to facilitate better pipeline connection.

[0072] In addition, the embodiment of the present application further provides a test system 1000, including the above-mentioned product model 100 of the battery device. Through the test system 1000, the product model 100 can be subjected to a physical performance test to verify the results of the above-mentioned simulation test and whether the results of the simulation test are reliable.

[0073] like Fig.10 As shown, in some embodiments, the test system 1000 further includes a refrigeration system 300. The refrigeration system 300 is in communication with the fluid domain 101, and is used to circulate a refrigerant toward the fluid domain 101. Thus, through the refrigeration system 300, a refrigerant can be circulated into the fluid domain 101, so as to test the performance of the direct cooling plate model 10 when performing refrigeration.

[0074] In some embodiments, the test system 1000 further includes a control detection system 400. The control detection system 400 is used to control the flow of the refrigerant of the refrigeration system 300 according to the temperature changes of the battery cell model 20 and the direct cooling plate model 10. Thus, by controlling the detection system 400, the flow of the refrigerant can be adjusted according to the temperature changes of the battery cell model 20 and the direct cooling plate model 10, so as to better test the direct cooling plate model 10.

[0075] In some embodiments, Fig.10 and Fig.11 As shown, the control detection system 400 includes a control system 410 and a detection system 420. The control system 410 is connected to the refrigeration system 300, and is used to control the flow of the refrigerant in the refrigeration system 300. The detection system 420 is electrically connected to the control system 410, and is used to detect the temperature changes of the battery cell model 20 and the direct cooling plate model 10. Thus, the temperature changes of the battery cell model 20 and the direct cooling plate model 10 can be detected by the detection system 420. The detection system 420 can transmit the detection results to the control system 410, and the control system 410 can control the flow of the refrigerant in the refrigeration system 300 according to the detection results of the detection system 420.

[0076] In some embodiments, the detection system 420 includes a first temperature sensor 421 and a second temperature sensor 422. The first temperature sensor 421 is electrically connected to the control system 410. The first temperature sensor 421 is used to detect the temperature of the battery cell model 20. The second temperature sensor 422 is electrically connected to the control system 410. The second temperature sensor 422 is used to detect the temperature of the direct cooling plate model 10. Thus, the temperature of the battery cell model 20 and the direct cooling plate model 10 can be detected by the first temperature sensor 421 and the second temperature sensor 422.

[0077] In some embodiments, the control system 410 may include a controller 411 and a signal collector 412. The signal collector 412 may be used to collect signals transmitted by the detection system 420 and transmit the signals to the controller 411. The controller 411 may control the refrigeration system 300 according to the received signals.

[0078] In some embodiments, the refrigeration system 300 includes an electronic expansion valve 310, a compressor 320, a condenser 330, and a refrigerant detection assembly 340. One end of the electronic expansion valve 310 is in communication with the inlet 102 of the fluid domain 101. One end of the compressor 320 is in communication with the outlet 103 of the fluid domain 101. One end of the condenser 330 is in communication with the compressor 320, and the other end is in communication with the other end of the electronic expansion valve 310. Thus, the compressor 320, the condenser 330, the electronic expansion valve 310, and the fluid domain 101 can form a circulation system, so that the refrigerant can be circulated and utilized.

[0079] The refrigerant detection component 340 is used to detect the flow of the refrigerant. The refrigerant flow can be detected by the refrigerant detection component 340 so that the control system 410 can make corresponding adjustments according to the flow of the refrigerant to ensure that the refrigerant can flow in a desired form.

[0080] In some embodiments, Fig.10 and Fig.12 As shown, the refrigerant detection component 340 includes a third temperature sensor 341. The third temperature sensor 341 is disposed between the electronic expansion valve 310 and the inlet 102. The temperature of the refrigerant entering the fluid domain 101 can be detected by the third temperature sensor 341, so that the control system 410 can make corresponding adjustments according to the temperature of the refrigerant to ensure that the refrigerant can flow at a desired temperature.

[0081] In some embodiments, the refrigerant detection assembly 340 includes a fourth temperature sensor 342. The fourth temperature sensor 342 is disposed between the compressor 320 and the outlet 103. The temperature of the refrigerant flowing out of the fluid domain 101 can be detected by the fourth temperature sensor 342, so that the control system 410 can make corresponding adjustments according to the temperature of the refrigerant to ensure that the refrigerant can flow at a desired temperature.

[0082] In some embodiments, the refrigerant detection assembly 340 includes a flow sensor 343. The flow sensor 343 is disposed between the electronic expansion valve 310 and the inlet 102. The flow rate of the refrigerant entering the fluid domain 101 can be detected by the flow sensor 343, so that the control system 410 can make corresponding adjustments according to the flow rate of the refrigerant to ensure that the refrigerant can flow at a desired flow rate.

[0083] In some embodiments, the refrigerant detection assembly 340 includes a first pressure sensor 344. The first pressure sensor 344 is disposed between the compressor 320 and the outlet 103. The pressure of the refrigerant flowing out of the fluid domain 101 can be detected by the first pressure sensor 344, so that the control system 410 can make corresponding adjustments according to the pressure of the refrigerant to ensure that the refrigerant can flow at a desired pressure.

[0084] In some embodiments, the refrigerant detection assembly 340 includes a second pressure sensor 345. The second pressure sensor 345 is disposed between the condenser 330 and the electronic expansion valve 310. The second pressure sensor 345 can detect the pressure of the refrigerant that will flow into the fluid domain 101, so that the control system 410 can make corresponding adjustments according to the pressure of the refrigerant to ensure that the refrigerant can flow at a desired pressure.

[0085] In some embodiments, the refrigerant detection assembly 340 further includes a third pressure sensor 346. The third pressure sensor 346 is disposed between the electronic expansion valve 310 and the inlet 102. The third pressure sensor 346 can detect the pressure of the refrigerant passing through the electronic expansion valve 310, so that the control system 410 can make corresponding adjustments according to the pressure of the refrigerant to ensure that the refrigerant can flow at a desired pressure.

[0086] like Fig.12 As shown, the third temperature sensor 341 , the fourth temperature sensor 342 , the flow sensor 343 , the first pressure sensor 344 , the second pressure sensor 345 and the third pressure sensor 346 may be electrically connected to the signal collector 412 so as to transmit corresponding signals to the signal collector 412 .

[0087] In some embodiments, the refrigeration system 300 may further include a liquid storage tank 350 and at least one check valve 360. The liquid storage tank 350 may be disposed between the condenser 330 and the electronic expansion valve 310 and may be used to store refrigerant. The check valve 360 ​​may be disposed at the flow port of the liquid storage tank 350 and may be used to control the flow direction of the refrigerant. For example, Fig.10 As shown, there may be two one-way valves 360 , which are respectively disposed between the condenser 330 and the liquid storage tank 350 , and between the liquid storage tank 350 and the electronic expansion valve 310 .

[0088] In addition, if Fig.10 As shown, the battery cell model 20 may be connected to a power source 500 to supply power to the battery cell model 20 and simulate a heating scenario of the battery cell.

[0089] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for detecting a battery device, characterized in that: The method comprises: Acquire a simulation model of a battery device to be detected; the battery device to be detected includes a battery cell and a direct cooling plate; the simulation model includes a simulation model of the battery cell and a simulation model of the direct cooling plate; Based on the simulation model of the battery cell, the heating scenario of the battery cell is simulated and the refrigerant parameters of the simulation model of the direct cooling plate are adjusted to obtain the simulated heat dissipation performance parameters of the simulation model of the direct cooling plate for the battery cell under a simulation environment.

2. The battery device detection method according to claim 1, characterized in that: The simulated heat dissipation performance parameter includes at least one of the following: The heat exchange capacity of the simulation model of the direct cooling plate; Temperature distribution of the simulation model of the direct cooling plate; The distribution of refrigerant components in the simulation model of the direct cooling plate; The temperature distribution of the refrigerant in the simulation model of the direct cooling plate.

3. The battery device detection method according to claim 1 or 2, characterized in that: The adjusting of the refrigerant parameters of the simulation model of the direct cooling plate includes: Based on a preset refrigerant control strategy, the refrigerant parameters of the simulation model of the direct cooling plate are adjusted; the preset refrigerant control strategy includes: circulation or disconnection of the refrigerant in the direct cooling plate, a flow control strategy of the refrigerant, and a flow rate control strategy of the refrigerant.

4. The battery device detection method according to claim 1 or 2, characterized in that: The adjusting of the refrigerant parameters of the simulation model of the direct cooling plate includes: The refrigerant parameters of the simulation model of the direct cooling plate are adjusted by functional coupling assignment of the physical parameters of the refrigerant in the simulation model of the direct cooling plate; the physical parameters include at least one of the following: gas-liquid component ratio, specific heat and dynamic viscosity.

5. The battery device detection method according to claim 1, characterized in that: The method further comprises: Testing the product model of the battery device to be tested to obtain actual heat dissipation performance parameters of the direct cooling plate on the battery cell in an actual scenario; the performance parameters of the product model are consistent with the parameters of the simulation model; If the difference between the actual heat dissipation performance parameter and the simulated heat dissipation performance parameter is within a preset range, it is determined that the simulated heat dissipation performance parameter is normal.

6. A product model of a battery device, characterized in that: The product model (100) is made according to the simulation model in the battery device detection method according to any one of claims 1 to 5; the product model (100) comprises a direct cooling plate model (10) and a battery cell model (20).

7. The product model of the battery device according to claim 6, characterized in that: The battery cell model (20) comprises: A simulated battery cell (21); and A heating device (22), the heating device (22) being used to heat the simulated battery cell (21) to simulate a heating scenario of the battery cell.

8. The product model of the battery device according to claim 7, characterized in that: The simulated battery cell (21) comprises: A first battery cell (211); and A second battery cell (212) stacked with the first battery cell (211); Wherein, along the stacking direction of the first battery core (211) and the second battery core (212), the heating device (22) is arranged between the first battery core (211) and the second battery core (212).

9. A testing system, characterized in that: A product model (100) comprising the battery device according to any one of claims 6 to 8.

10. The test system according to claim 9, characterized in that: The direct cooling plate model (10) comprises a fluid domain (101); the test system (1000) further comprises: A refrigeration system (300), the refrigeration system (300) being in communication with the fluid domain (101) and being used for circulating a refrigerant into the fluid domain (101).

11. The test system according to claim 10, characterized in that: The testing system (1000) further comprises: A control detection system (400), wherein the control detection system (400) is used to control the flow of the refrigerant of the refrigeration system (300) according to the temperature changes of the battery core model (20) and the direct cooling plate model (10).

12. The test system according to claim 11, characterized in that: The control detection system (400) comprises: a control system (410), the control system (410) being connected to the refrigeration system (300) and being used to control the flow of the refrigerant in the refrigeration system (300); and A detection system (420) is electrically connected to the control system (410) and is used to detect temperature changes of the battery core model (20) and the direct cooling plate model (10).

13. The test system according to claim 12, characterized in that: The detection system (420) comprises: A first temperature sensor (421) electrically connected to the control system (410), the first temperature sensor (421) being used to detect the temperature of the battery cell model (20); A second temperature sensor (422) is electrically connected to the control system (410), and the second temperature sensor (422) is used to detect the temperature of the direct cooling plate model (10).

14. The test system according to claim 13, characterized in that: The fluid domain (101) has an inlet (102) and an outlet (103); the refrigeration system (300) comprises: An electronic expansion valve (310), one end of the electronic expansion valve (310) being in communication with the inlet (102) of the fluid domain (101); A compressor (320), one end of which is in communication with the outlet (103) of the fluid region (101); a condenser (330), one end of which is in communication with the compressor (320), and the other end of which is in communication with the other end of the electronic expansion valve (310); and A refrigerant detection component (340), wherein the refrigerant detection component (340) is used to detect the flow condition of the refrigerant.

15. The test system according to claim 14, characterized in that: The refrigerant detection component (340) comprises: a third temperature sensor (341), disposed between the electronic expansion valve (310) and the inlet (102); and / or, a fourth temperature sensor (342), disposed between the compressor (320) and the outlet (103); and / or, a flow sensor (343), arranged between the electronic expansion valve (310) and the inlet (102); and / or, a first pressure sensor (344) disposed between the compressor (320) and the outlet (103); and / or, a second pressure sensor (345), disposed between the condenser (330) and the electronic expansion valve (310); and / or, A third pressure sensor (346) is disposed between the electronic expansion valve (310) and the inlet (102).

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