Energy storage battery liquid cooling plate performance test system and performance test method

Abstract

The invention discloses a performance test system and a performance test method for a liquid cooling plate of an energy storage battery. The system comprises a high and low temperature humid and hot environment box, a high and low temperature liquid cooling testing machine, a condensate water sensor, a first temperature sensor, a second temperature sensor, a pressure sensor, a data recorder and a linkage controller. According to the embodiment of the invention, the performance conditions of the liquid cooling plate under different environmental conditions and cooling conditions (pressure, flow and temperature) in the actual use process can be simulated, weak points of the liquid cooling plate and positions with poor performance can be better identified and improved and optimized in a targeted manner according to actual test data and in combination with simulation results, and the test efficiency is improved. And the comprehensive performance of the energy storage battery system in the actual operation process is improved. The embodiment of the invention is suitable for testing the performance of the liquid cooling plate of the energy storage battery applied to large-scale storage and industrial and commercial storage in the market, and can effectively reduce the waste of manpower and time cost caused by the construction of different test benches for evaluating different performances of different liquid cooling plates.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling plate development and testing, and in particular to a performance testing system and a performance testing method for a liquid cooling plate of an energy storage battery. Background Art

[0002] With the continuous development of the new energy industry, batteries for energy storage and power are gradually developing towards large capacity and high energy density. In particular, the basic requirement for batteries for industrial and commercial energy storage and source-grid side energy storage is a square lithium iron phosphate battery with a capacity of ≥280Ah. The increase in capacity will lead to an increase in size and volume. During use, the temperature distribution difference of the battery itself will increase, and the thermal non-uniformity will increase. At the same time, the degree of integration of battery packs is getting higher and higher. The grouping method has developed from 48 or 52 battery packs to 104 battery packs. The doubling of the battery pack grouping method has increased the size and volume. During use, the temperature distribution inside the battery pack is uneven, and the temperature difference at different positions becomes larger. The greater the temperature difference between the battery and the battery pack, the more inconsistency the battery system will have during use, which will accelerate the life decay of the battery system, thereby affecting the service life and revenue.

[0003] In response to battery heating and uneven temperature, the commonly used cooling methods for energy storage batteries are air cooling and liquid cooling. The liquid cooling method mainly removes heat through heat exchange between the liquid cooling plate and the battery. For battery systems with large capacity, high energy density, and high degree of integration, liquid cooling is better than air cooling in temperature management and temperature distribution management. In actual operation, it can remove more heat, thereby reducing the temperature of the battery during use; at the same time, the liquid cooling plate contacts each battery in the battery pack in the same way and area. Through a reasonable liquid cooling plate design, it can ensure the consistency of heat removed from each battery cell, thereby effectively ensuring the thermal consistency inside the battery pack.

[0004] Therefore, the performance of the liquid cooling plate itself will directly affect the performance of the battery temperature distribution during product design and subsequent use. The performance and parameter performance evaluation of the liquid cooling plate itself is an important part of component management and control. However, the currently commonly used method for evaluating the performance of liquid cooling plates is to conduct charge and discharge tests after grouping the battery packs, and further feedback the performance of the liquid cooling plate through the temperature of the battery cells. This test method will obviously be affected by the consistency differences of the battery cell materials themselves, the consistency differences of the process control of the battery pack production process, etc., resulting in a certain deviation in the performance of the liquid cooling plate using the battery cell temperature performance feedback. At the same time, this test method has high production verification costs and long cycles, and cannot promptly identify and rectify possible problems with the liquid cooling plate. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a performance testing system and a performance testing method for a liquid cooling plate of an energy storage battery.

[0006] A first aspect of the present invention provides a performance test system for a liquid cooling plate of an energy storage battery, comprising a high and low temperature and damp heat environment box, a high and low temperature liquid cooling test machine, a condensation water sensor, a first temperature sensor, a second temperature sensor, a pressure sensor, a data recorder and a linkage controller;

[0007] The high and low temperature and humid heat environment box is used to load the liquid cooling plate;

[0008] The high and low temperature liquid cooling test machine is respectively connected to the water inlet and outlet of the liquid cooling, and is used to transport and recover the cooling liquid to the liquid cooling plate;

[0009] The condensation water sensor and the first temperature sensor are arranged on the test point of the liquid cooling plate, and are used to obtain the condensation water and temperature parameters of the liquid cooling plate;

[0010] The second temperature sensor and the pressure sensor are installed at the water inlet and the water outlet of the liquid cooling plate, and are used to detect the temperature and pressure of the water inlet and the water outlet of the liquid cooling plate;

[0011] The data recorder is connected to the condensation sensor, the first temperature sensor, the second temperature sensor and the pressure sensor, and is used to record the collected data of the condensation sensor, the first temperature sensor, the second temperature sensor and the pressure sensor;

[0012] The linkage controller is respectively connected to the high and low temperature humidity and heat environment box, the high and low temperature liquid cooling test machine and the data recorder, and is used to issue control instructions to the high and low temperature humidity and heat environment box and the high and low temperature liquid cooling test machine and monitor the operation of the energy storage battery liquid cooling plate performance test system.

[0013] Furthermore, the liquid cooling plate is suspended in the high-low-temperature and humid heat environment box; the high-low-temperature and humid heat environment box can adjust the environmental conditions in the box according to the control instructions of the linkage controller.

[0014] Furthermore, the high and low temperature liquid cooling test machine can control the coolant to be output to the water inlet of the liquid cooling plate under preset cooling conditions; the cooling conditions are set according to the control instructions of the linkage controller, specifically including the temperature, flow rate and pressure of the coolant.

[0015] Furthermore, the water outlet of the high and low temperature liquid cooling test machine is connected to the water inlet of the liquid cooling plate, and the water inlet of the high and low temperature liquid cooling test machine is connected to the water outlet of the liquid cooling plate, so that a cooling circuit is formed between the high and low temperature liquid cooling test machine and the liquid cooling plate;

[0016] The number of the test points is plural, and the test points are specifically arranged on the inner and outer sides of the installation position of the liquid cooling plate battery module, so that the condensation sensor and the first temperature sensor can collect the condensation and temperature change differences at different test points of the liquid cooling plate.

[0017] Furthermore, the first temperature sensor is a temperature sensitive wire.

[0018] The second aspect of the present invention provides a method for testing the performance of a liquid cooling plate of an energy storage battery, which is applied to the performance testing system of the liquid cooling plate of an energy storage battery described in the first aspect, and comprises the following steps:

[0019] Suspending the liquid cooling plate in the high and low temperature humid heat environment box; connecting the water outlet of the high and low temperature liquid cooling test machine to the water inlet of the liquid cooling plate, and connecting the water inlet of the high and low temperature liquid cooling test machine to the water outlet of the liquid cooling plate, so that a cooling circuit is formed between the high and low temperature liquid cooling test machine and the liquid cooling plate;

[0020] Determine a test point on the liquid cooling plate, and arrange the condensation water sensor and the first temperature sensor on the test point;

[0021] Setting the cooling conditions of the coolant output by the high and low temperature liquid cooling test machine, and setting the environmental conditions of the high and low temperature humid heat environment box;

[0022] Starting the high and low temperature liquid cooling test machine to perform a performance test on the liquid cooling plate;

[0023] Read the collected data recorded by the data recorder and output it as the performance test result.

[0024] Further, the performance test results specifically include the test point temperature, the water content of the condensation sensor at the test point, the water inlet pressure, the water outlet pressure, the water inlet temperature and the water outlet temperature;

[0025] The test point temperature is obtained by first temperature sensors arranged at multiple test points on the liquid cooling plate;

[0026] The water content of the condensation water sensor at the test point is obtained by condensation water sensors arranged at multiple test points of the liquid cooling plate;

[0027] The water inlet pressure and the water outlet pressure are obtained by pressure sensors installed at the water inlet and outlet of the liquid cooling plate respectively;

[0028] The water inlet temperature and the water outlet temperature are obtained by second temperature sensors installed at the water inlet and the water outlet of the liquid cooling plate, respectively.

[0029] Furthermore, the method further includes a step of analyzing the performance test results; the analysis of the performance test results specifically includes the following steps:

[0030] Obtaining the temperature distribution of the liquid cooling plate according to the test point temperatures of the test points at different positions of the liquid cooling plate;

[0031] Obtaining the temperature distribution consistency of the liquid cooling plate according to the test point temperatures of the inner test point and the outer test point of the liquid cooling plate;

[0032] According to the water content of the condensation water sensor at the test points at different positions of the liquid cooling plate, the condensation water conditions at different positions of the liquid cooling plate are obtained;

[0033] Obtaining a temperature difference between a water inlet and a water outlet of a liquid cooling plate according to the water inlet temperature and the water outlet temperature; obtaining a cooling condition for minimizing heat loss of the liquid cooling plate according to the water inlet and water outlet temperature difference of the liquid cooling plate;

[0034] The pressure difference between the inlet and outlet of the liquid cooling plate is obtained according to the inlet pressure and the outlet pressure; and the cooling condition with the minimum flow resistance of the liquid cooling plate is obtained according to the inlet and outlet pressure difference of the liquid cooling plate.

[0035] Furthermore, the method further comprises the following steps:

[0036] Fix the cooling conditions of the coolant output by the high and low temperature liquid cooling test machine, and change the environmental conditions of the high and low temperature humid heat environment box;

[0037] Return to start the high and low temperature liquid cooling test machine to perform a performance test on the liquid cooling plate, and perform a new round of performance test on the liquid cooling plate;

[0038] A new round of collected data recorded by the data recorder is read and output as a new round of performance test results.

[0039] Furthermore, the method further comprises the following steps:

[0040] Fix the environmental conditions of the high and low temperature and humid heat environment box, and change the cooling conditions of the coolant output by the high and low temperature liquid cooling test machine;

[0041] Return to start the high and low temperature liquid cooling test machine to perform a performance test on the liquid cooling plate, and perform a new round of performance test on the liquid cooling plate;

[0042] A new round of collected data recorded by the data recorder is read and output as a new round of performance test results.

[0043] The embodiment of the present invention also discloses a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. A processor of a computer device can read the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the above method.

[0044] The embodiments of the present invention have the following beneficial effects: The embodiments of the present invention provide a performance test system and a performance test method for a liquid cooling plate for an energy storage battery, which can simulate the performance of the liquid cooling plate under different environmental conditions, cooling conditions (pressure, flow, temperature), etc. during actual use. According to the actual test data and the simulation results, the weak points of the liquid cooling plate and the locations with poor performance can be better identified for targeted improvement and optimization, thereby improving the comprehensive performance of the energy storage battery system during actual operation. The embodiments of the present invention are suitable for performance testing of liquid cooling plates for energy storage batteries for large-scale storage and industrial and commercial storage applications on the market, and can effectively reduce the waste of manpower and time costs caused by the need to build different test benches for different performance evaluations of different liquid cooling plates.

[0045] Additional aspects and advantages of the present invention will be given in part in the following description and, in part, will be obvious from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 It is a structural schematic diagram of a performance test system for a liquid cooling plate of an energy storage battery according to the present invention.

[0048] Figure 2 It is a schematic diagram of the layout of test points inside and outside a liquid cooling plate of a performance test system for an energy storage battery liquid cooling plate of the present invention.

[0049] Figure 3 It is a schematic diagram of the steps of a method for testing the performance of a liquid cooling plate of an energy storage battery of the present invention.

[0050] Figure 4 This is a temperature distribution diagram of different locations inside the liquid cooling plate in a test example.

[0051] Figure 5 This is a temperature distribution diagram of different locations on the outside of the liquid cooling plate in a test example.

[0052] Figure markings: 1-high and low temperature humidity and heat environment box, 2-liquid cooling plate, 3-first temperature sensor, 4-condensation sensor, 5-data recorder, 6-linkage controller, 7-water inlet pipe, 8-high and low temperature liquid cooling test machine, 9-water outlet pipe, 10-pressure sensor, 11-second temperature sensor. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0054] In order to solve the above problems, the first embodiment of the present invention proposes a test system specifically for the energy storage battery liquid cooling plate, which can simulate the performance of the liquid cooling plate under different environmental conditions, environmental humidity, cooling conditions (pressure, flow, temperature) and other conditions during actual use. According to the actual test data and combined with the simulation results, the weak points of the liquid cooling plate and the locations with poor performance can be better identified and targetedly improved and optimized, thereby improving the comprehensive performance of the energy storage battery system during actual operation.

[0055] Specifically, Figure 1 As shown, an energy storage battery liquid cooling plate performance test system according to an embodiment of the present invention includes a high and low temperature humidity and heat environment box, a high and low temperature liquid cooling test machine, a condensation sensor, a first temperature sensor, a second temperature sensor, a pressure sensor, a data recorder and a linkage controller.

[0056] For the liquid cooling plate, since the liquid cooling plate is used to dissipate heat from the battery module, it is recommended to arrange test points inside and outside each battery module of the liquid cooling plate for testing. Figure 2 As shown, in the embodiment of the present invention, 12 test points are arranged correspondingly at the inner and outer positions of the liquid cooling plate to evaluate the difference in temperature between the inward heat conduction and the outward heat conduction at the same position of the liquid cooling plate, and the order of condensation at different positions under the same environment.

[0057] The following is a detailed description of the various components of the liquid cooling plate performance test system according to the embodiment of the present invention:

[0058] High-low temperature and humid heat environment box: The liquid cooling plate 2 to be tested in the embodiment of the present invention is installed in the high-low temperature and humid heat environment box 1. The high-low temperature and humid heat environment box 1 can set different environmental conditions such as temperature, humidity, etc. to simulate the working performance of the liquid cooling plate 2 under different environmental conditions. In the embodiment of the present invention, the liquid cooling plate 2 is suspended in the high-low temperature and humid heat environment box 1 to achieve the smallest possible physical contact area between the liquid cooling plate 2 and the high-low temperature and humid heat environment box 1, so that the heat exchange is basically achieved through the air. The specific suspension method can be achieved by setting a pedestal to support the liquid cooling plate 2 at the four corners of the liquid cooling plate 2 (assuming it is a square liquid cooling plate 2) so that the bottom surface of the liquid cooling plate 2 is suspended in the air; or the liquid cooling plate 2 is suspended in the air of the high-low temperature and humid heat environment box 1 by a rope, etc. The specific suspension method is not limited in the embodiment of the present invention.

[0059] High and low temperature liquid cooling test machine: In the embodiment of the present invention, the high and low temperature liquid cooling test machine 8 is used to output the coolant to the inside of the liquid cooling plate 2 to promote the cooling cycle of the liquid cooling plate 2. The high and low temperature liquid cooling test machine 8 is connected to the water inlet 7 and the water outlet 9 of the liquid cooling plate 2. Therefore, when the liquid cooling plate 2 is installed in the high and low temperature humid heat environment box 1 and the high and low temperature liquid cooling test machine 8 is connected to the liquid cooling plate 2 through the water inlet 7 and the water outlet 9 of the liquid cooling plate 2, the coolant can be transferred between the high and low temperature liquid cooling test machine 8 and the liquid cooling plate 2. The high and low temperature liquid cooling test machine 8 can set different temperatures, flow rates, and pressures to simulate different cooling conditions and verify the performance of the liquid cooling plate 2 under different cooling conditions.

[0060] Condensation sensor: When the surface temperature of the liquid cooling plate 2 is lower than the ambient temperature, water vapor in the surrounding air will condense on the surface of the liquid cooling plate 2 to form water droplets. Therefore, the condensation condition at the corresponding position of the liquid cooling plate 2 can be characterized by the amount of condensation absorbed by the condensation sensor 4. In the embodiment of the present invention, the condensation sensor 4 is arranged at the test points on the inner and outer sides of the liquid cooling plate 2, and the insulation design of the liquid cooling plate 2 is optimized by the condensation conditions at different positions of the liquid cooling plate 2. In some embodiments, only a simple condensation test is required for the liquid cooling plate 2. In this case, a condensation test paper that changes color when exposed to water can be provided to replace the condensation sensor 4 for the condensation test. When the condensation test paper changes color, it indicates that there is condensation water at the corresponding position of the liquid cooling plate 2. If it does not change color, there is no condensation water.

[0061] Temperature sensor: The temperature sensor is used to detect the temperature at the corresponding position. In the embodiment of the present invention, the temperature sensor is divided into a first temperature sensor 3 and a second temperature sensor 11 according to the arrangement position of the temperature sensor, wherein the first temperature sensor 3 is installed at the test points on the inner and outer sides of the liquid cooling plate 2, and is used to detect the temperature at different positions inside and outside the liquid cooling plate 2. Since the liquid cooling plate 2 is a suspended design, in order to facilitate installation, the first temperature sensor 3 can use a temperature sensing line for temperature detection. The second temperature sensor 11 is installed in the water inlet 7 and water outlet 9 pipes of the liquid cooling plate 2, and is used to detect the temperature difference between the coolant at the water inlet 7 and the coolant at the water outlet 9.

[0062] Pressure sensor: In the embodiment of the present invention, the pressure sensor 10 is installed in the water inlet 7 and the water outlet 9 pipeline of the liquid cooling plate 2 to detect the pressure difference between the coolant at the water inlet 7 and the coolant at the water outlet 9.

[0063] Data recorder: In the embodiment of the present invention, the data recorder 5 is connected to the pressure sensor 10, the temperature sensor and the condensation sensor 4, records the collected data of the pressure sensor 10, the temperature sensor and the condensation sensor 4, and forms performance test data output.

[0064] Interlocking controller: In the embodiment of the present invention, the interlocking controller 6 is connected to the high and low temperature and humid heat environment box 1, the high and low temperature liquid cooling test machine 8 and the data recorder 5, and can issue control instructions to the high and low temperature and humid heat environment box 1 and the high and low temperature liquid cooling test machine 8 and monitor the operation of the performance test system of the energy storage battery liquid cooling plate 2. In the embodiment of the present invention, the environmental condition adjustment of the high and low temperature and humid heat environment box 1, the cooling adjustment of the high and low temperature liquid cooling test machine 8 and the experimental data reading of the data recorder 5 can all be achieved through the control instructions of the interlocking controller 6. In some embodiments, the interlocking controller 6 has a wireless communication function, which can realize remote monitoring of the test conditions and real-time operating status of the liquid cooling plate 2. When it is necessary to change the environmental conditions or cooling conditions of the test, the control instructions can be issued remotely through the interlocking controller 6, which can reduce the configuration of on-site personnel, reduce the risk of errors caused by human operation, etc., and improve the efficiency of test evaluation.

[0065] The equipment used in the system of the embodiment of the present invention are all commonly used laboratory equipment. After combining them in the manner described in the scheme, the performance of the liquid cooling plate 2 can be effectively evaluated. When the performance evaluation of the liquid cooling plate 2 is not needed, they can also be decomposed into equipment for single function. The grouping is simple, flexible and convenient.

[0066] Corresponding to the above system embodiment, as Figure 3 As shown, the second embodiment of the present invention provides a method for testing the performance of a liquid cooling plate of an energy storage battery, comprising the following steps:

[0067] S1. Suspend the liquid cooling plate in a high and low temperature humid heat environment box, connect the water outlet of the high and low temperature liquid cooling test machine to the water inlet of the liquid cooling plate, and connect the water inlet of the high and low temperature liquid cooling test machine to the water outlet of the liquid cooling plate, so that a cooling circuit is formed between the high and low temperature liquid cooling test machine and the liquid cooling plate;

[0068] S2. Determine the test point on the liquid cooling plate, and arrange the condensation sensor and the first temperature sensor at the test point;

[0069] S3. Set the cooling conditions of the coolant output by the high and low temperature liquid cooling test machine, and set the environmental conditions of the high and low temperature and humid heat environment box;

[0070] S4. Start the high and low temperature liquid cooling test machine to perform the performance test of the liquid cooling plate;

[0071] S5. Read the collected data recorded by the data recorder and output it as the performance test result.

[0072] The performance test results in the embodiment of the present invention specifically include the test point temperature, the water content of the test point condensation sensor, the water inlet pressure, the water outlet pressure, the water inlet temperature and the water outlet temperature. The test point temperature is obtained by the first temperature sensor arranged at multiple test points of the liquid cooling plate; the water content of the test point condensation sensor is obtained by the first temperature sensor arranged at multiple test points of the liquid cooling plate; the water inlet pressure and the water outlet pressure are respectively obtained by the pressure sensors installed at the water inlet and the water outlet of the high-low temperature and humid heat environment box; the water inlet temperature and the water outlet temperature are respectively obtained by the second temperature sensors installed at the water inlet and the water outlet of the high-low temperature and humid heat environment box.

[0073] In some embodiments, after obtaining the performance test results, the following steps are also included:

[0074] S6. Analyze the performance test results.

[0075] The performance test result analysis of step S6 specifically includes:

[0076] The temperature distribution of the liquid cooling plate is obtained according to the test point temperatures of the test points at different positions of the liquid cooling plate, and a temperature distribution cloud diagram of the liquid cooling plate is drawn.

[0077] According to the test point temperatures of the inner and outer test points of the liquid cooling plate, the temperature difference between the inside and outside of different positions is obtained to obtain the temperature distribution consistency of the liquid cooling plate, such as Figure 4 , 5 And as shown in Table 1. Figure 4 , 5 This is the temperature data of different positions inside and outside the liquid cooling plate under the liquid cooling plate test example. Figure 4 It can be seen that the temperature uniformity of the inner side of this liquid cooling plate is good, and the temperature difference at different positions on the inner side is controlled within 2°C, which can well control the consistency of the battery pack temperature; combined with the correspondence of the inner and outer temperatures at the same position and the calculation of the temperature difference in Table 1, it can be seen that the maximum temperature difference between the inner and outer sides of this liquid cooling plate is 5.82°C, and the minimum temperature difference is 3.92°C. The difference in temperature between the inner and outer sides is controlled within 2°C. Overall, this liquid cooling plate has good temperature uniformity.

[0078] Table 1

[0079]

[0080] The condensation conditions at different positions of the liquid cooling plate are obtained according to the water content of the condensation sensors at the test points at different positions of the liquid cooling plate.

[0081] The temperature difference between the water inlet and the water outlet of the liquid cooling plate is obtained according to the water inlet temperature and the water outlet temperature; and the cooling condition with the minimum heat loss of the liquid cooling plate is obtained according to the temperature difference between the water inlet and the water outlet of the liquid cooling plate.

[0082] The pressure difference between the inlet and outlet of the liquid cooling plate is obtained according to the water inlet pressure and the water outlet pressure; and the cooling condition with the minimum flow resistance of the liquid cooling plate is obtained according to the pressure difference between the inlet and outlet of the liquid cooling plate.

[0083] After completing the performance test of the liquid cooling plate, it is sometimes necessary to change the environmental conditions under the same cooling conditions to evaluate the heat loss of the liquid cooling plate itself under different environmental conditions. Specifically, the pressure difference ΔP1 between the water inlet and outlet of the battery pack liquid cooling plate under different environmental conditions is obtained through the pressure sensor 10 on the water inlet pipe 7 and the water outlet pipe 9 to evaluate the flow resistance of the liquid cooling plate 2 under different environmental conditions; the temperature data obtained by the temperature sensors 3 at 12 positions arranged on the inner side of the liquid cooling plate is used to draw a temperature distribution cloud map of the liquid cooling plate and compare it with the simulation results to verify the accuracy of the simulation results and correct the simulation model according to the actual data; the temperature data obtained by the temperature sensors 3 at 12 positions arranged on the inner side of the liquid cooling plate and the temperature data obtained by the temperature sensors 3 at 12 positions arranged on the outer side are used to obtain the temperature distribution cloud map of the liquid cooling plate and compare it with the simulation results to verify the accuracy of the simulation results and correct the simulation model according to the actual data; The temperature data obtained by the device 3 is compared to obtain the temperature difference ΔTn inside and outside different positions to determine the consistency of the temperature distribution of the liquid cooling plate 2 itself, and at the same time determine the effects of internal and external heat dissipation and heat exchange of different liquid cooling plate design schemes to seek the optimal liquid cooling plate design scheme. At the same time, the weak positions of the liquid cooling plate design are identified according to ΔTn, and targeted optimization and improvement are carried out; through the 12 condensation sensors 4 arranged inside and outside the liquid cooling plate, the critical environmental conditions that cause condensation of the liquid cooling plate 2 under the current cooling conditions can be identified, thereby confirming the insulation design of the liquid cooling plate in combination with the actual use environment conditions of the final product.

[0084] After completing the performance test of the liquid cooling plate, it is sometimes necessary to change the cooling conditions under the same environmental conditions to evaluate the cooling conditions with the minimum heat loss of the liquid cooling plate under the corresponding environmental conditions. Specifically, the pressure difference ΔP2 between the inlet and outlet of the battery pack liquid cooling plate under different cooling conditions is obtained through the pressure sensor 10 on the water inlet pipe 7 and the water outlet pipe 9 to evaluate the cooling condition with the minimum flow resistance of the liquid cooling plate under the corresponding environmental conditions; the temperature data obtained by the temperature sensors 3 at 12 positions arranged on the inner side of the liquid cooling plate is used to draw a temperature distribution cloud map of the liquid cooling plate and compare it with the simulation results to verify the accuracy of the simulation results and correct the simulation model according to the actual data; the temperature data obtained by the temperature sensors 3 at 12 positions arranged on the inner side of the liquid cooling plate and the temperature data obtained by the temperature sensors 3 at 12 positions arranged on the outer side are used to obtain the temperature distribution cloud map of the liquid cooling plate and compare it with the simulation results to verify the accuracy of the simulation results and correct the simulation model according to the actual data; The temperature data obtained by the device 3 is compared to obtain the temperature difference ΔT2n inside and outside different positions to determine the consistency of the temperature distribution of the liquid cooling plate 2 itself, and at the same time determine the effects of internal and external heat dissipation and heat exchange of different liquid cooling plate design schemes to seek the optimal liquid cooling plate design scheme. At the same time, the weak positions of the liquid cooling plate design are identified according to ΔTn, and targeted optimization and improvement are carried out; through the 12 condensation sensors 4 arranged inside and outside the liquid cooling plate, the critical cooling conditions that cause condensation of the liquid cooling plate 2 under the current environmental conditions can be identified, so as to confirm the cooling condition design of the liquid cooling plate in combination with the actual use environment conditions of the final product.

[0085] In some embodiments, different coolant pressures can be set and run through the high and low temperature liquid cooling tester 8 to verify whether the liquid cooling plate will be damaged when it runs under extreme pressure conditions (the national standard requires 1.2 times the maximum working pressure) for a period of time, which is used to verify the ultimate working capacity of the liquid cooling plate.

[0086] Through the method of the embodiment of the present invention, the conventional performance and extreme performance of the liquid cooling plate can be tested and evaluated, and the test and evaluation capabilities are diversified, which can effectively reduce the waste of manpower and time costs caused by the need to build different test benches for different performance evaluations.

[0087] Those skilled in the art will appreciate that the modules in the devices in the embodiments of the present invention may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments of the present invention may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including corresponding claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including corresponding claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0088] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0089] In addition, each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. In particular, for embodiments such as devices and equipment, since they are basically similar to method embodiments, the relevant parts can refer to the partial description of the method embodiments. The embodiments of the devices and equipment described above are merely schematic, wherein the modules, units, etc. described as separate components may or may not be physically separated, that is, they may be located in one place, or they may be distributed in multiple places, such as nodes of a system network. Specifically, some or all of the modules and units may be selected according to actual needs to achieve the purpose of the above-mentioned embodiment scheme. Those skilled in the art can understand and implement it without paying creative labor.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0091] In addition, the terms "first", "second", etc. used in the embodiments of the present invention are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in the present embodiment. Therefore, the features defined by the terms "first", "second", etc. in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of the present invention, the word "multiple" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0092] In the embodiments of the present invention, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, components, features, and elements with the same name in different embodiments of the present invention may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context in the specific embodiment.

[0093] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and cannot be construed as limitations of the present invention, and those of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention. Those skilled in the art will readily come to think of other embodiments of the present invention after considering the specification and practicing the present invention. This application is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and embodiments are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

Claims

1. A performance test system for a liquid cooling plate of an energy storage battery, characterized in that: It includes a high and low temperature and wet heat environment box, a high and low temperature liquid cooling test machine, a condensation water sensor, a first temperature sensor, a second temperature sensor, a pressure sensor, a data recorder and a linkage controller; The high and low temperature and humid heat environment box is used to load the liquid cooling plate; The high and low temperature liquid cooling test machine is connected to the liquid cooling plate and is used to transport and recover the cooling liquid to the liquid cooling plate; The condensation water sensor and the first temperature sensor are arranged on the test point of the liquid cooling plate, and are used to obtain the condensation water and temperature parameters of the liquid cooling plate; The second temperature sensor and pressure sensor are installed at the water inlet and outlet of the liquid cooling plate to detect the temperature and pressure of the water inlet and outlet of the liquid cooling plate; The data recorder is connected to the condensation sensor, the first temperature sensor, the second temperature sensor and the pressure sensor, and is used to record the collected data of the condensation sensor, the first temperature sensor, the second temperature sensor and the pressure sensor; The linkage controller is respectively connected to the high and low temperature humidity and heat environment box, the high and low temperature liquid cooling test machine and the data recorder, and is used to issue control instructions to the high and low temperature humidity and heat environment box and the high and low temperature liquid cooling test machine and monitor the operation of the energy storage battery liquid cooling plate performance test system.

2. The energy storage battery liquid cooling plate performance test system according to claim 1, characterized in that: The liquid cooling plate is suspended in the high-low-temperature and humid-heat environment box; the high-low-temperature and humid-heat environment box can adjust the environmental conditions in the box according to the control instructions of the linkage controller.

3. The energy storage battery liquid cooling plate performance test system according to claim 1, characterized in that: The high and low temperature liquid cooling test machine can control the coolant to be output to the water inlet of the liquid cooling plate under preset cooling conditions; the cooling conditions are set according to the control instructions of the linkage controller, specifically including the temperature, flow rate and pressure of the coolant.

4. The energy storage battery liquid cooling plate performance test system according to claim 1, characterized in that: The water outlet of the high and low temperature liquid cooling test machine is connected to the water inlet of the liquid cooling plate, and the water inlet of the high and low temperature liquid cooling test machine is connected to the water outlet of the liquid cooling plate, so that a cooling circuit is formed between the high and low temperature liquid cooling test machine and the liquid cooling plate; The number of the test points is plural, and the test points are specifically arranged on the inner and outer sides of the installation position of the liquid cooling plate battery module, so that the condensation sensor and the first temperature sensor can collect the condensation and temperature change differences at different test points of the liquid cooling plate.

5. The energy storage battery liquid cooling plate performance test system according to claim 1, characterized in that: The first temperature sensor is a temperature sensing wire.

6. A method for testing the performance of a liquid cooling plate of an energy storage battery, applied to the performance testing system of a liquid cooling plate of an energy storage battery as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Suspending the liquid cooling plate in the high and low temperature humid heat environment box, connecting the water outlet of the high and low temperature liquid cooling test machine to the water inlet of the liquid cooling plate, and connecting the water inlet of the high and low temperature liquid cooling test machine to the water outlet of the liquid cooling plate, so that a cooling circuit is formed between the high and low temperature liquid cooling test machine and the liquid cooling plate; Determine a test point on the liquid cooling plate, and arrange the condensation water sensor and the first temperature sensor on the test point; Setting the cooling conditions of the coolant output by the high and low temperature liquid cooling test machine, and setting the environmental conditions of the high and low temperature humid heat environment box; Starting the high and low temperature liquid cooling test machine to perform a performance test on the liquid cooling plate; Read the collected data recorded by the data recorder and output it as the performance test result.

7. A method for testing the performance of a liquid cooling plate for an energy storage battery according to claim 6, characterized in that: The performance test results specifically include the test point temperature, the water content of the condensation sensor at the test point, the water inlet pressure, the water outlet pressure, the water inlet temperature and the water outlet temperature; The test point temperature is obtained by first temperature sensors arranged at multiple test points on the liquid cooling plate; The water content of the condensation water sensor at the test point is obtained by condensation water sensors arranged at multiple test points of the liquid cooling plate; The water inlet pressure and the water outlet pressure are obtained by pressure sensors installed at the water inlet and outlet of the liquid cooling plate respectively; The water inlet temperature and the water outlet temperature are obtained by second temperature sensors installed at the water inlet and the water outlet of the liquid cooling plate, respectively.

8. A method for testing the performance of a liquid cooling plate for an energy storage battery according to claim 7, characterized in that: The step of analyzing the performance test results is also included; the analysis of the performance test results specifically includes the following steps: Obtaining the temperature distribution of the liquid cooling plate according to the test point temperatures of the test points at different positions of the liquid cooling plate; Obtaining the temperature distribution consistency of the liquid cooling plate according to the test point temperatures of the inner test point and the outer test point of the liquid cooling plate; According to the water content of the condensation water sensor at the test points at different positions of the liquid cooling plate, the condensation water conditions at different positions of the liquid cooling plate are obtained; Obtaining a temperature difference between a water inlet and a water outlet of a liquid cooling plate according to the water inlet temperature and the water outlet temperature; obtaining a cooling condition for minimizing heat loss of the liquid cooling plate according to the water inlet and water outlet temperature difference of the liquid cooling plate; The pressure difference between the inlet and outlet of the liquid cooling plate is obtained according to the inlet pressure and the outlet pressure; and the cooling condition with the minimum flow resistance of the liquid cooling plate is obtained according to the inlet and outlet pressure difference of the liquid cooling plate.

9. A method for testing the performance of a liquid cooling plate for an energy storage battery according to claim 6, characterized in that: The following steps are also included: Fix the cooling conditions of the coolant output by the high and low temperature liquid cooling test machine, and change the environmental conditions of the high and low temperature humid heat environment box; Return to the step of starting the high and low temperature liquid cooling test machine to perform a performance test on the liquid cooling plate, and perform a new round of performance test on the liquid cooling plate; A new round of collected data recorded by the data recorder is read and output as a new round of performance test results.

10. A method for testing the performance of a liquid cooling plate for an energy storage battery according to claim 6, characterized in that: The following steps are also included: Fix the environmental conditions of the high and low temperature and humid heat environment box, and change the cooling conditions of the coolant output by the high and low temperature liquid cooling test machine; Return to start the high and low temperature liquid cooling test machine to perform a performance test on the liquid cooling plate, and perform a new round of performance test on the liquid cooling plate; A new round of collected data recorded by the data recorder is read and output as a new round of performance test results.

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