Systems and methods to simulate cooling system aging and coolant leakage

Abstract

The application discloses a system for simulating aging of a cooling system and leakage of cooling liquid, which comprises a first experimental platform and a second experimental platform. The first experimental platform is used for carrying out vibration experiments on a new cooling system according to a use mode of a battery pack until the new cooling system reaches a cooling liquid leakage condition, and determining the new cooling system reaching the cooling liquid leakage condition as a target cooling system. The new cooling system does not leak cooling liquid. The second experimental platform is used for carrying out experiments on a target battery pack provided with the target cooling system according to a use scene of a vehicle to simulate leakage of the cooling liquid, and monitoring and displaying a reduction amount of the cooling liquid in the target cooling system, a temperature at a target battery cell and overall state parameters of the target battery pack, so that the aging of the cooling system and the leakage of the cooling liquid in the aged cooling system are simulated better according to the use mode of the battery pack and the use scene of the vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power batteries, and more particularly, to an experiment for simulating aging of a cooling system and leakage of cooling liquid. BACKGROUND

[0002] With the development of the times and the innovation of technology, new energy is more and more deeply involved in human life, and electric vehicles are becoming more and more popular. Generally, the power battery of an electric vehicle will generate a lot of heat accumulation during operation. In order to ensure the normal operation of the power battery, the product cooling system, or the cooling system, plays a key role. That is, the failure of the cooling system is the main cause of safety accidents.

[0003] In the prior art, the cooling system is usually filled with a certain amount of cooling liquid on a turnover table, and then the leakage of the cooling liquid in the cooling system is observed by turning over. However, the actual leakage of the cooling liquid, such as the working mode of the cooling system when the cooling liquid leaks, the leakage point, the flow rate, etc., cannot be well simulated by the prior art.

[0004] Therefore, how to better simulate the aging of the cooling system and the leakage of the cooling liquid is a technical problem to be solved at present. SUMMARY

[0005] The embodiments of the present application provide a system and method for simulating aging of a cooling system and leakage of cooling liquid, to better simulate the aging of the cooling system and the leakage of the cooling liquid in the aged cooling system.

[0006] In a first aspect, a system for simulating aging of a cooling system and leakage of cooling liquid is provided, comprising a first experimental platform and a second experimental platform.

[0007] The first experimental platform is configured to perform a vibration experiment on a new cooling system according to a usage mode of a battery pack, until the new cooling system reaches a cooling liquid leakage condition, and determine the new cooling system that reaches the cooling liquid leakage condition as a target cooling system; the new cooling system does not have cooling liquid leakage.

[0008] The second experimental platform is configured to perform an experiment simulating leakage of cooling liquid on a target battery pack equipped with the target cooling system according to a usage scenario of a vehicle, and monitor and display a reduction amount of the cooling liquid in the target cooling system, a temperature at a target battery cell, and overall state parameters of the target battery pack.

[0009] In a second aspect, a method for simulating aging of a cooling system and leakage of cooling liquid is provided, and is applied to the system for simulating aging of a cooling system and leakage of cooling liquid. The method comprises:

[0010] The first experimental platform is built, and the new cooling system is subjected to a vibration experiment according to the use mode of the battery pack by using the first experimental platform until the new cooling system reaches the cooling liquid leakage condition, and the new cooling system reaching the cooling liquid leakage condition is determined as the target cooling system; the new cooling system does not have cooling liquid leakage;

[0011] The second experimental platform is built, and the target battery pack equipped with the target cooling system is subjected to an experiment simulating cooling liquid leakage according to the use scenario of the vehicle by using the second experimental platform, and the reduction amount of the cooling liquid in the target cooling system, the temperature at the target battery cell, and the overall state parameters of the target battery pack reaching the cooling liquid leakage condition are monitored and displayed.

[0012] By applying the above technical solution, in the system simulating the aging of the cooling system and the leakage of the cooling liquid, the first experimental platform and the second experimental platform are included, the use mode of the battery pack is simulated by the first experimental platform, the new cooling system is subjected to a vibration experiment, until the new cooling system reaches the cooling liquid leakage condition, and the cooling system is determined as the target cooling system, then, the target battery pack equipped with the target cooling system is subjected to an experiment simulating cooling liquid leakage according to the use scenario of the vehicle by the second experimental platform, and the reduction amount of the cooling liquid in the target cooling system, the temperature at the target battery cell, and the overall state parameters of the target battery pack reaching the cooling liquid leakage condition are monitored and displayed. In this way, by the first and second experimental platforms in the system, the new cooling system is subjected to a vibration experiment according to the use mode of the battery pack, the aging process of the cooling system can be better simulated, the cooling system reaching the condition of cooling liquid leakage, that is, the aged cooling system, is obtained, in addition, the obtained aged cooling system is subjected to an experiment simulating the leakage of the cooling liquid according to the use scenario of the vehicle, the simulation of the leakage of the cooling liquid of the aged cooling system can be better achieved, and the whole simulation process has high authenticity and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any inventive labor.

[0014] Figure 1 A schematic diagram of a system simulating the aging of a cooling system and the leakage of a cooling liquid according to an embodiment of the present application is shown;

[0015] Figure 2 A schematic diagram of a cooling system according to an embodiment of the present application is shown;

[0016] Figure 3A schematic diagram of a method for simulating aging of a cooling system and leakage of a cooling liquid is shown according to an embodiment of the present application.

[0017] Figure 4 A schematic diagram of a structure of a second experimental platform is shown according to an embodiment of the present application.

[0018] Figure 5 A schematic diagram of a flow of a method for simulating aging of a cooling system and leakage of a cooling liquid is shown according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0020] In order to better simulate aging of a cooling system and leakage of a cooling liquid in the aged cooling system, the present application provides a system for simulating aging of a cooling system and leakage of a cooling liquid, as shown in the figure. Figure 1 The system includes a first experimental platform and a second experimental platform.

[0021] The first experimental platform is used to perform a vibration experiment on a new cooling system according to a use mode of a battery pack until the new cooling system leaks the cooling liquid, and determine the new cooling system reaching the cooling liquid leakage condition as a target cooling system. The new cooling system is a cooling system that has not been used and has not leaked the cooling liquid.

[0022] For example, the new cooling system can be a water cooling system installed in a certain battery pack product, such as a water cooling system in product a, as shown in the figure. Figure 2 Generally, the water cooling system includes a water cooling plate, a water cooling pipeline loop, a water inlet, and a water outlet (not shown in the figure). Figure 2

[0023] The use mode of the battery pack is a working mode in an actual working process of the battery pack when the new cooling system is assembled in the battery pack.

[0024] Optionally, the first experimental platform includes a vibration experimental table. At this time, the new cooling system is installed on the vibration experimental table in the first experimental platform, and the vibration experiment (or mechanical vibration experiment, three comprehensive experiments, etc.) is performed on the new cooling system according to the use mode of the battery pack.

[0025] ​In a possible implementation, the vibration test bench performs a vibration test on the new cooling system installed on the test bench according to preset vibration parameters and preset temperature impact parameters, so as to age the new cooling system, that is, to make the new cooling system reach the cooling liquid leakage condition, and to realize the effect of simulating the aging process of the cooling system.

[0026] The preset vibration parameters include a preset vibration direction and a preset vibration intensity. The preset temperature impact parameters include a preset maximum temperature value (T max ) and a preset minimum temperature value (T min ) when a temperature impact occurs during the vibration process.

[0027] Specifically, the key parameters in the vibration test process, that is, the preset vibration parameters, can be provided by the water-cooled plate in the new cooling system and the overall design team.

[0028] Generally, in the overall vehicle use scenario of the vehicle, various structural parts on the vehicle are mainly affected by vibration and temperature, and the power battery containing the cooling system in the vehicle, for example, the battery pack mentioned above, is also mainly affected by vibration and temperature during the use of the structural parts on the vehicle. Therefore, by installing the new cooling system on the vibration test bench and performing a vibration test on the cooling system according to the preset vibration parameters and the preset temperature impact parameters, the aging process of the new cooling system in the actual working state can be better simulated, and the authenticity and reliability of the aging simulation of the new cooling system can be ensured.

[0029] It should be noted that the specific experimental method of the vibration test can refer to the existing technology, for example, the vibration test method given in section 8.2.1 of GB / T 38031-2020.

[0030] Optionally, the first test platform includes a gas tightness test module. The gas tightness test module is configured to periodically perform a gas tightness test on the new cooling system, that is, the new cooling system installed on the vibration test bench, during the vibration test. If the gas tightness fails, it is determined that the new cooling system reaches the cooling liquid leakage condition, and the new cooling system that reaches the cooling liquid leakage condition is determined as a target cooling system, and the leakage point in the target cooling system that can cause the cooling liquid leakage is determined.

[0031] The method of periodically (or regularly) performing a gas tightness test on the new cooling system during the vibration test, that is, during the vibration process, can refer to the existing technology, for example, the gas tightness test method given in the relevant technical specification.

[0032] In a possible implementation, the vibration test is paused when the gas tightness fails for the first time, and the leakage point in the obtained target cooling system (water-cooled plate) is found.

[0033] Specifically, the number of leakage points can be N, where N is a positive integer greater than or equal to 1.

[0034] The second experimental platform is used to simulate the cooling liquid leakage experiment of the target battery pack equipped with the target cooling system according to the use scenario of the vehicle, and monitor and display the reduction amount of the cooling liquid in the target cooling system, the temperature at the target electric core, and the overall state parameter of the target battery pack.

[0035] Optionally, the second experimental platform comprises the target battery pack, the temperature acquisition sensor, the temperature acquisition instrument, the computer, the charge-discharge cabinet, and the water cooling machine.

[0036] The computer is in communication connection with the water cooling machine and the charge-discharge cabinet, and is used to control the water cooling machine and the charge-discharge cabinet to perform the simulation of the cooling liquid leakage experiment of the target battery pack according to the use scenario of the vehicle, and to monitor the overall state of the target battery pack in real time to obtain and display the overall state parameter of the target battery pack.

[0037] The water cooling machine is used to monitor and display the reduction amount of the cooling liquid (i.e., the leakage amount of the cooling liquid) in the target cooling system in real time during the simulation of the cooling liquid leakage experiment of the target battery pack.

[0038] The temperature acquisition sensor is located at the target electric core, and is used to collect the temperature at the target electric core during the simulation of the cooling liquid leakage experiment of the target battery pack. The target electric core is the closest electric core to the leakage point in the target cooling system in the target battery pack.

[0039] It can be understood that the leakage point in the target cooling system can be multiple, and correspondingly, the number of temperature acquisition sensors can also be multiple, and the temperature acquisition sensors and the leakage points in the target cooling system have a corresponding relationship. Correspondingly, the number of target electric cores can also be multiple, and the target electric cores and the temperature acquisition sensors are in one-to-one correspondence.

[0040] The temperature acquisition instrument is in communication connection with the temperature acquisition sensor, and is used to monitor the temperature acquisition sensor in real time during the simulation of the cooling liquid leakage experiment of the target battery pack to obtain and display the temperature at the target electric core.

[0041] It should be noted that through this process, the second experimental platform can further simulate vehicle usage scenarios and perform aging simulations on the new cooling system in the first experimental platform to obtain an aged cooling system that reaches the target cooling system condition for coolant leakage. Then, the target battery pack equipped with this target cooling system is simulated for coolant leakage. Through real-time monitoring data, such as the temperature at the target cell, the overall parameters of the target battery pack, and the amount of coolant reduction in the target cooling system, the coolant leakage situation of the aged cooling system can be clearly observed, including the amount of leaked coolant, the impact of coolant leakage on the temperature of the target cell, and the impact on the target battery pack. This better simulates the working mode of the target cooling system, that is, the coolant leakage situation under the working mode.

[0042] In one possible implementation, a computer-controlled water chiller and charging / discharging cabinet conduct a simulated coolant leakage experiment on the target battery pack according to the vehicle's usage scenario.

[0043] A water-cooled machine is used to circulate coolant under computer control, simulating vehicle usage scenarios, in order to adjust the temperature of the target battery pack.

[0044] A charging and discharging cabinet is used to charge and discharge a target battery pack under computer control, simulating vehicle usage scenarios.

[0045] Specifically, the water-cooled engine adds coolant to the target cooling system according to the vehicle's overall capacity and circulates the coolant according to the vehicle's water-cooling strategy.

[0046] In other words, when the water-cooled engine simulates the coolant circulation during the operation of the entire vehicle, it adds coolant according to the amount of coolant in the vehicle. That is, it adds coolant to the cooling system according to the amount of coolant in the vehicle and sets it according to the water-cooling strategy of the vehicle, so that the coolant in the water-cooling system circulates according to the water-cooling strategy.

[0047] Specifically, the charging and discharging cabinet charges the target battery pack according to the vehicle's overall fast charging strategy and discharges the target battery pack according to the vehicle's overall operating conditions and road spectrum.

[0048] In other words, when the charging and discharging cabinet conducts charging and discharging experiments on the target battery pack in a simulated vehicle usage scenario, the charging steps are set using the vehicle fast charging strategy, and the discharging steps are set using the vehicle operating condition road spectrum.

[0049] This process involves charging and discharging the target battery pack according to the vehicle's usage scenarios, adding coolant to the target cooling system installed in the target battery pack, and controlling the coolant circulation. This allows for the simulation of coolant leakage in the target cooling system under real-world vehicle usage scenarios, thereby improving the realism and reliability of the simulation.

[0050] In one possible implementation, the computer is used to determine whether the target battery pack is malfunctioning based on the overall state parameters of the target battery pack, and, in conjunction with whether the target battery pack is malfunctioning, to control whether to continue or stop the experiment simulating coolant leakage of the target battery pack.

[0051] In other words, after determining whether the target battery pack is abnormal based on its overall state parameters, the computer then controls whether to continue or stop the experiment simulating coolant leakage based on the overall state parameters of the target battery pack and whether the target battery pack is abnormal.

[0052] Specifically, the overall state parameters of the target battery pack include the voltage of the target battery pack and the temperature at the target cell. A computer communicates with a temperature acquisition device, which is used to label the target cell and obtain its temperature. Specifically, the computer can be used to determine if the target battery pack has malfunctioned when there is a sudden voltage drop and / or a sudden temperature rise at the target cell.

[0053] Correspondingly, the computer can also be used to determine that the target battery pack is not abnormal when there is no sudden drop in voltage at the target voltage pack and no sudden rise in temperature at the target cell.

[0054] Understandably, when the target battery pack malfunctions, both its voltage and the temperature of the target cells will change. Therefore, a sudden change in either or both of these factors—a sudden voltage drop and / or a sudden temperature rise—can confirm an abnormality in the target battery pack. This abnormality could manifest as a short circuit, smoke, or even a fire.

[0055] Furthermore, specifically, the overall state parameters of the target battery pack include the amount of coolant reduction. Based on this, it can be understood that the computer, connected to a water chiller, can obtain the coolant reduction data. Further, the computer can be used to control the stopping or continuing of the simulated coolant leakage experiment on the target battery pack based on whether an anomaly has occurred in the target battery pack, combined with the coolant reduction data obtained from the water chiller.

[0056] More specifically, the computer is used to stop the simulated coolant leakage experiment on the target battery pack if an anomaly occurs before the coolant reduction reaches its maximum value, and to compile the data obtained in the simulated coolant leakage experiment.

[0057] Correspondingly, the computer is also used to continue adding coolant to the target cooling system if no abnormality occurs in the target battery pack until the coolant reduction reaches its maximum value, and to conduct a simulated coolant leakage experiment on the target battery pack.

[0058] The maximum value can be determined based on the total amount of coolant in the vehicle.

[0059] For example, the maximum value can be a value on the order of the total amount of coolant in the vehicle, or it can be a value slightly smaller than the order of the total amount of coolant in the vehicle.

[0060] In addition, the amount of coolant added can be determined based on the actual volume of the target battery pack.

[0061] For example, the volume of the actual target battery pack, or a slightly smaller amount, can be determined as the amount of coolant to be added.

[0062] Alternatively, computers can be used to determine the degree of anomaly in the target battery pack after identifying an anomaly, and then determine whether to continue the experiment simulating coolant leakage in the target battery pack based on the degree of anomaly.

[0063] Optionally, in the second experimental platform, the computer is also used to record the vehicle operating condition road spectrum of the target battery pack before the abnormality occurs, and convert the running vehicle operating condition road spectrum into the target mileage.

[0064] In this way, by converting the target mileage into the vehicle's operating conditions before the abnormality, we can provide a reference for how many miles the vehicle's power will be affected after a coolant leak. Alternatively, we can combine the vehicle's driving speed to provide a reference for how long the vehicle's power will be affected after a coolant leak, thus providing a certain guarantee for safe driving after a coolant leak.

[0065] Optionally, the computer can also record the target reduction amount, i.e., the amount of coolant reduction when the target battery pack malfunctions. In this case, the target reduction amount can provide a reference for how much coolant leakage would cause problems with the vehicle, and provide a basis for a more accurate assessment of the safety risks posed by the amount of coolant leakage.

[0066] Optionally, the second experimental platform also includes a thermal imager. This thermal imager is used to monitor the temperature of the target battery pack in real time and provide the overall temperature change trend of the target battery pack.

[0067] In one possible implementation, the computer can also be used to determine the degree of abnormality in the target battery pack after identifying an anomaly, by combining other data such as the overall temperature change trend of the target battery pack provided by a thermal imager. Based on the degree of abnormality, it can then determine whether to continue the simulated coolant leakage experiment on the target battery pack. In other words, by running the second experimental platform, the initial focus is on the overall state parameters of the target battery pack monitored by the temperature acquisition device and computer. Once an anomaly is identified, the overall temperature trend of the target battery pack, obtained through real-time monitoring by the thermal imager, can be observed.

[0068] Specifically, the degree of abnormality in the target battery pack can be classified as short circuit, smoke, and fire.

[0069] If, based on the overall temperature change trend of the target battery pack, it is determined that the abnormality of the target battery pack is a short circuit or smoke, then the experiment simulating coolant leakage will continue; if, based on the overall temperature trend of the target battery pack, it is determined that the abnormality of the target battery pack is a fire, then the experiment simulating coolant leakage will be stopped.

[0070] In this way, the experiment simulating coolant leakage on the target battery pack can be stopped relatively in time, avoiding serious damage caused by fire during the experiment.

[0071] In one possible implementation, the computer is also used to record the vehicle operating conditions road spectrum when the target battery pack malfunctions to the point of emitting smoke, and convert the operating vehicle operating conditions road spectrum into the corresponding mileage.

[0072] In this way, by converting the mileage from the vehicle's operating conditions before the target battery pack emitted smoke (a level of abnormality), we can provide a reference for how many miles a vehicle powered by the target battery pack will travel after a coolant leak before serious problems occur. Alternatively, by combining this with the vehicle's speed, we can determine how long a vehicle will travel after a coolant leak before serious problems occur, thus providing a certain degree of assurance for safe driving of vehicles powered by the target battery pack after a coolant leak.

[0073] Finally, it should be noted that the above-mentioned system for simulating cooling system aging and coolant leakage uses a first experimental platform to conduct vibration tests on the new cooling system according to the usage of the battery pack until the new cooling system reaches the condition of coolant leakage, i.e., after obtaining the aging target cooling system, a second experimental platform is used to conduct simulated coolant leakage tests on the target battery pack equipped with the target cooling system according to the vehicle's usage scenario. The relevant experimental data is monitored and displayed. By referring to the usage of the battery pack and the vehicle's usage scenario, the aging of the cooling system and the situation of coolant leakage after the cooling system ages can be simulated well, and a more realistic and reliable simulation effect can be obtained.

[0074] To better simulate the aging of a cooling system and coolant leakage after aging, embodiments of this application also provide a method for simulating cooling system aging and coolant leakage, applicable to, for example... Figure 1 The diagram illustrates a system aging and coolant leakage in a simulated cooling system. For example... Figure 3 As shown, the method includes steps S301-S304:

[0075] Step S301: Set up the first experimental platform.

[0076] A first experimental platform is constructed using a vibration test bench and an airtightness test module, and a new cooling system is installed on the vibration test bench to facilitate the execution of step S302, simulating the aging process of the new cooling system.

[0077] Step S302: Using the first experimental platform, conduct a vibration test on the new cooling system according to the usage method of the battery pack until the new cooling system reaches the condition of coolant leakage, and determine the new cooling system that reaches the condition of coolant leakage as the target cooling system.

[0078] For a detailed explanation of this step, please refer to the above content, which will not be repeated here.

[0079] Step S303: Build the second experimental platform.

[0080] Optionally, a second experimental platform can be built using a target battery pack equipped with the target cooling system in step S302, a temperature acquisition sensor, a temperature acquisition instrument, a charge / discharge cabinet, a computer, and a water chiller.

[0081] Specifically, the target cooling system in step S302 is assembled into the target battery pack, and the temperature acquisition sensor is installed at the cell of the target battery pack closest to the leak point where the coolant leaks in the target cooling system, i.e., at the target cell. The temperature acquisition instrument is connected to the temperature acquisition sensor, and the connection between the charging and discharging cabinet, the computer, and the water chiller is established to obtain the second experimental platform.

[0082] Optionally, a second experimental platform can be built using a target battery pack equipped with the target cooling system in step S302, a temperature acquisition sensor, a temperature acquisition instrument, a charge / discharge cabinet, a computer, a water chiller, and a thermal imager.

[0083] The functions of each component in the second experimental platform can be found in the above content, and will not be repeated here.

[0084] For example, the structure of the second experimental platform can be as follows: Figure 4 As shown, the system includes a target battery pack equipped with a target water-cooling system designed to induce coolant leakage, temperature sensors located at the cells closest to the leak points 1, 2, 3, ..., N (not shown), a temperature acquisition instrument connected to the temperature sensors, a water chiller, a charging / discharging cabinet, a computer, and a thermal imager. Connecting lines 1, 2, 3, ..., N on the side of the temperature acquisition instrument are respectively connected to the temperature sensors at the cells closest to the leak points 1, 2, 3, ..., N.

[0085] Step S304: Using the second experimental platform, conduct a simulated coolant leakage experiment on the target battery pack equipped with the target cooling system according to the vehicle's usage scenario, monitor and display the amount of coolant reduction in the target cooling system, the temperature at the target cell, and the overall status parameters of the target battery pack.

[0086] For details on the specific implementation of this step, please refer to the above content, which will not be repeated here.

[0087] For example, the process of simulating cooling system aging and coolant leakage in this application can be as follows: Figure 5 As shown. After the experiment begins, an aging test is conducted on the new water-cooling system, specifically a vibration test using the first experimental platform, until a target water-cooling system is obtained that meets the conditions for coolant leakage. Next, the target water-cooling system is assembled into the target battery pack. Then, a second experimental platform is built to simulate coolant leakage. Following this, a leakage test is conducted on the target battery pack equipped with the target cooling system, as described above, simulating coolant leakage, and the experimental data is observed. Finally, the experiment ends when an abnormality is detected in the target battery pack. Once no abnormality is detected, coolant is added, the simulated coolant leakage experimental platform is rebuilt, and the leakage test is conducted again.

[0088] It should be noted that by using the first experimental platform to conduct vibration tests on the new cooling system according to the usage of the battery pack until the new cooling system reaches the condition of coolant leakage, i.e., obtaining the target cooling system that reaches the condition of coolant leakage, the second experimental platform is used to conduct simulated coolant leakage tests on the target battery pack equipped with the target cooling system according to the vehicle's usage scenario. The relevant experimental data is monitored and displayed. By referring to the usage of the battery pack and the vehicle's usage scenario, the aging of the cooling system and the situation of coolant leakage after the cooling system ages can be simulated better, and a more realistic and reliable simulation effect can be obtained.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A system for simulating cooling system aging and coolant leakage, characterized in that, The system includes a first experimental platform and a second experimental platform; The first experimental platform is used to conduct vibration tests on the new cooling system according to the usage of the battery pack until the new cooling system reaches the condition of coolant leakage, and the new cooling system that reaches the condition of coolant leakage is identified as the target cooling system; the new cooling system does not experience coolant leakage; The second experimental platform is used to conduct a simulated coolant leakage experiment on the target battery pack equipped with the target cooling system according to the vehicle's usage scenario, and to monitor and display the amount of coolant reduction in the target cooling system, the temperature at the target cell, and the overall status parameters of the target battery pack. The first experimental platform includes a vibration test bench; The new cooling system is installed on the vibration test bench, specifically for conducting vibration tests on the new cooling system according to preset vibration parameters and preset temperature impact parameters. The preset vibration parameters include a preset vibration direction and a preset vibration intensity; the preset temperature shock parameters include a preset maximum temperature value and a preset minimum temperature value when a temperature shock occurs during vibration. The first experimental platform includes an airtightness testing module; The airtightness testing module is used to periodically test the airtightness of the new cooling system during the vibration experiment. If the airtightness fails, the new cooling system is determined to have reached the coolant leakage condition. The new cooling system that has reached the coolant leakage condition is identified as the target cooling system, and the leak point in the target cooling system that can cause coolant leakage is identified. The second experimental platform consists of the target battery pack equipped with the target cooling system, a temperature acquisition sensor, a temperature acquisition instrument, a computer, a charge / discharge cabinet, and a water cooling mechanism; The computer is communicatively connected to the water chiller and the charging / discharging cabinet, and is used to control the water chiller and the charging / discharging cabinet to conduct a simulated coolant leakage experiment on the target battery pack according to the vehicle's usage scenario, and to monitor the overall status of the target battery pack in real time, and to obtain and display the overall status parameters of the target battery pack. The water chiller is used to monitor and display the amount of coolant reduction in the target cooling system in real time when conducting a simulated coolant leakage experiment on the target battery pack. The temperature acquisition sensor is located at the target cell and is used to acquire the temperature at the target cell when conducting a simulated coolant leakage experiment on the target battery pack; the target cell is the cell in the target battery pack that is closest to the leak point. The temperature acquisition instrument is communicatively connected to the temperature acquisition sensor and is used to monitor the temperature acquisition sensor in real time during the experiment simulating coolant leakage of the target battery pack, so as to obtain and display the temperature at the target battery cell.

2. The system for simulating cooling system aging and coolant leakage according to claim 1, characterized in that, The water chiller is used to circulate coolant under the control of the computer, simulating the usage scenario of the vehicle, in order to adjust the temperature of the target battery pack. The charging and discharging cabinet is used to charge and discharge the target battery pack under the control of the computer, simulating the usage scenario of the vehicle.

3. The system for simulating cooling system aging and coolant leakage according to claim 2, characterized in that, The water chiller is specifically used to add coolant to the target cooling system according to the vehicle's overall capacity, and to circulate the coolant according to the vehicle's water cooling strategy. The charging and discharging cabinet is specifically used to charge the target battery pack according to the vehicle's fast charging strategy and to discharge the target battery pack according to the vehicle's operating condition road spectrum.

4. The system for simulating cooling system aging and coolant leakage according to claim 1, characterized in that, The computer is used to determine whether the target battery pack is abnormal based on the overall state parameters of the target battery pack, and, in conjunction with whether the target battery pack is abnormal, to control whether to continue or stop the experiment simulating coolant leakage on the target battery pack. The overall state parameters of the target battery pack include the voltage of the target battery pack and the temperature at the target cell. The computer is communicatively connected to the temperature acquisition instrument, used to mark the target battery cell and obtain the temperature at the target battery cell through the temperature acquisition instrument; The computer is specifically used to determine that the target battery pack is malfunctioning when the voltage of the target battery pack suddenly drops and / or the temperature at the target cell suddenly rises.

5. The system for simulating cooling system aging and coolant leakage according to claim 4, characterized in that, The overall state parameters of the target battery pack include the amount of coolant reduction; The computer is connected to the water chiller and is used to obtain the amount of coolant reduction through the water chiller; The computer is configured to stop conducting a simulated coolant leakage experiment on the target battery pack if the target battery pack exhibits an abnormality before the coolant reduction reaches its maximum value, and to compile the data obtained in the simulated coolant leakage experiment; the maximum value is determined based on the total amount of coolant in the vehicle. The computer is configured to continue adding coolant to the target cooling system and conduct the simulated coolant leakage experiment on the target battery pack if no abnormality occurs in the target battery pack until the reduction of coolant reaches its maximum value. The computer is used to record the vehicle operating condition road spectrum of the target battery pack before the abnormality occurred, and convert the operating vehicle operating condition road spectrum into the target mileage. The computer is used to record the target reduction in coolant when the target battery pack malfunctions.

6. The system for simulating cooling system aging and coolant leakage according to any one of claims 1-5, characterized in that, The second experimental platform also includes a thermal imager; The thermal imager is used to monitor the temperature of the target battery pack in real time and provide the temperature change trend of the target battery pack.

7. A method for simulating cooling system aging and coolant leakage, characterized in that, The method, applied to a system simulating aging and coolant leakage of a cooling system as described in any one of claims 1-5, comprises: A first experimental platform was built, and a vibration test was conducted on the new cooling system according to the usage method of the battery pack, until the new cooling system reached the condition of coolant leakage. The new cooling system that reached the condition of coolant leakage was identified as the target cooling system; the new cooling system did not experience coolant leakage. A second experimental platform was built, and the second experimental platform was used to conduct a simulated coolant leakage experiment on the target battery pack equipped with the target cooling system according to the vehicle's usage scenario. The amount of coolant reduction in the target cooling system, the temperature at the target cell, and the overall status parameters of the target battery pack were monitored and displayed.

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