High-applicability simulation test device and method for temperature uniformity of energy storage battery pack

Abstract

The invention relates to a high-applicability simulation test device for the temperature uniformity of an energy storage battery pack. The high-applicability simulation test device comprises a plurality of simulation test unit assemblies, a cooling module and an auxiliary material, the simulation test unit assemblies are connected with the cooling module through auxiliary materials, the simulation test unit assemblies are used for simulating the heating and heat dissipation states of battery cells in the to-be-tested battery pack in the charging process, and the simulation test unit assemblies are arranged according to the arrangement mode of the battery cells in the to-be-tested battery pack; the simulation test unit assembly comprises a test main body, a plurality of heating modules, a temperature measurement module and a power supply; the testing main body is installed on the cooling module, one end of the heating module is installed above the testing main body, and the other end of the heating module is connected with the power supply. According to the technical scheme provided by the embodiment of the invention, the aluminum block is used for replacing the battery cell, the construction period can be shortened and the cost can be reduced on the premise of not influencing the test, meanwhile, the heating and heat dissipation conditions of different battery packs can be simulated, and the method is suitable for the temperature uniformity test of various energy storage battery packs.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery packs, and in particular to a highly applicable device and method for simulating temperature uniformity testing of energy storage battery packs. Background Art

[0002] Energy storage is a technology that has received much attention in the field of new energy, and its development process has gradually matured. Energy storage battery packs are battery systems specially designed to provide power to a variety of power consumption sites. Compared with ordinary small device power supply batteries, energy storage battery packs have greater power reserves and can meet higher power demands. They are suitable for a variety of scenarios such as home, commercial and industrial. They can not only provide additional power support during peak power demand, but also serve as a backup power source when power supply is insufficient, ensuring the stability and reliability of power consumption.

[0003] The batteries in the energy storage battery pack are mostly arranged in groups of multiple cells. By testing the temperature uniformity between the batteries in the battery pack, the basic parameters of the battery and the direction of subsequent improvements can be effectively grasped. The existing method to determine the temperature uniformity performance of the battery pack is usually to build a physical sample or use an electric heating film to simulate the heating of the cell area, and conduct a battery pack environmental simulation test to obtain the temperature difference results of the battery pack. However, in practice, it is found that if a physical sample is built and the battery cell is used as a test sample, there are problems such as high cost and long cycle; the heat generation of the electric heating film is unstable, the local temperature difference is large, and the reference value of the test results is low. Summary of the invention

[0004] (I) Purpose of the invention

[0005] The purpose of the present invention is to provide a highly applicable energy storage battery pack temperature uniformity simulation test device and method. By using aluminum blocks instead of battery cells, the construction period and cost can be reduced without affecting the test. At the same time, the heating and heat dissipation of different battery packs can be simulated. It is suitable for temperature uniformity tests of various energy storage battery packs, and is used to solve the problems of existing energy storage battery pack temperature uniformity simulation test devices, such as high cost and long cycle; unstable heat generation, large local temperature difference, and low reference value of test results.

[0006] (II) Technical solution

[0007] In order to solve the above problems, the first aspect of the present invention provides a highly applicable energy storage battery pack temperature uniformity simulation test device, comprising: a plurality of simulation test unit components, a cooling module and auxiliary materials;

[0008] The simulation test unit assembly is connected to the cooling module through the auxiliary material, and the simulation test unit assembly is used to simulate the heating and heat dissipation state of the battery cells in the battery pack to be tested during the charging process. The simulation test unit assembly is arranged according to the arrangement of the battery cells in the battery pack to be tested;

[0009] The simulation test unit assembly includes a test body, a plurality of heating modules, a temperature measurement module and a power supply;

[0010] The test body is mounted on the cooling module, one end of the heating module is mounted above the test body, the other end of the heating module is connected to the power supply, and the temperature measuring module is arranged at the bottom of one side of the test body;

[0011] The plurality of heating modules are evenly distributed above the test body, and the heating modules in the plurality of simulation test unit assemblies correspond to each other one by one.

[0012] Furthermore, the cooling module is a liquid cooling base plate, comprising:

[0013] A liquid injection port is used to inject coolant into the cooling module.

[0014] Furthermore, the material of the test subject includes aluminum material, which is used to simulate the battery cells in the battery pack to be tested;

[0015] The heating module is used to simulate the heat generated by the battery cells in the battery pack to be tested;

[0016] The cooling module is used to simulate the heat dissipation of the battery cells in the battery pack to be tested;

[0017] The auxiliary materials are used to simulate the actual packaging conditions of the battery pack to be tested.

[0018] Furthermore, the auxiliary materials include: heat conductive materials and shock absorbing and buffering materials;

[0019] The heat conductive material is arranged at the connection between the test body and the cooling module;

[0020] The shock-absorbing and buffering material is arranged between two simulation test unit assemblies.

[0021] Furthermore, the thermally conductive material includes thermally conductive silicone grease;

[0022] The shock-absorbing and buffering material includes ultra-thin foam.

[0023] According to another aspect of the present invention, a highly applicable energy storage battery pack temperature uniformity test method is provided, and the energy storage battery pack temperature uniformity test is performed using the highly applicable energy storage battery pack temperature uniformity test device as described above, and the temperature uniformity test method comprises:

[0024] Use multiple simulation test unit components to simulate the heat generation situation of the battery pack to be tested;

[0025] Start the cooling module to simulate the heat dissipation situation of the battery pack to be tested;

[0026] Analyze the temperature uniformity of the battery pack to be tested based on the heat generation situation and heat dissipation situation.

[0027] Further, the use of simulation test unit components to simulate the heat generation situation of the battery pack to be tested includes:

[0028] Arrange the simulation test unit components according to the arrangement method of the battery cells in the battery pack to be tested;

[0029] Set the heat generation parameters of the simulation test unit components according to the heat generation parameters of the battery cells in the battery pack to be tested.

[0030] Further, the setting of the heat generation parameters of the simulation test unit components according to the heat generation parameters of the battery cells in the battery pack to be tested includes:

[0031] Set the power of the heating module according to the heat generation parameters of the battery cells in the battery pack to be tested;

[0032] Among them, the heat generation parameters include heat generation power and temperature;

[0033] Adjust the power of the heating module according to the temperature parameters of the temperature measurement module to make it consistent with the heat generation parameters of the battery cells in the battery pack to be tested.

[0034] Further, the start of the cooling module to simulate the heat dissipation situation of the battery pack to be tested includes:

[0035] When the temperature of the test body reaches the heat generation parameters of the battery cells, add coolant with a set flow rate and temperature to the cooling module;

[0036] Adjust the power of the heating module to make the power of the heating module consistent with the heat generation parameters of the battery cells.

[0037] Further, the analysis of the temperature uniformity of the battery pack to be tested includes:

[0038] Simulate the heat generation parameters of the battery cells according to the operating conditions of the energy storage battery pack, and adjust the heat generation power of the heating module to make it consistent with the heat generation parameters of the battery cells;

[0039] Read and record the temperature parameters of the temperature measurement module at set time intervals, and draw a temperature uniformity curve according to the temperature parameters;

[0040] Calculate the temperature uniformity of the energy storage battery pack using the following formula:

[0041]

[0042] in, is the maximum temperature of the measuring point, is the minimum temperature of the measuring point, is the maximum temperature difference, i.e. the temperature uniformity value of the measured battery, t m is the time interval.

[0043] (III) Beneficial effects

[0044] The above technical solution of the present invention has the following beneficial technical effects:

[0045] The present invention provides a highly applicable energy storage battery pack temperature uniformity simulation test device, comprising: a plurality of simulation test unit assemblies, a cooling module and auxiliary materials; the simulation test unit assembly is connected to the cooling module through the auxiliary materials, the simulation test unit assembly is used to simulate the heating and heat dissipation state of the battery cells in the battery pack to be tested during the charging process, and the simulation test unit assembly is arranged according to the arrangement of the battery cells in the battery pack to be tested; the simulation test unit assembly comprises a test body, a plurality of heating modules, a temperature measuring module and a power supply; the test body is installed on the cooling module, one end of the heating module is installed above the test body, the other end of the heating module is connected to the power supply, and the temperature measuring module is arranged at the bottom of one side of the test body; the plurality of heating modules are evenly distributed above the test body, and the heating modules in the plurality of simulation test unit assemblies correspond to each other one by one.

[0046] The technical solution provided by the embodiment of the present invention uses aluminum blocks instead of battery cells, which can reduce construction period and cost without affecting the test, and can simulate the heating and heat dissipation of different battery packs, and is suitable for temperature uniformity testing of various energy storage battery packs. The arrangement and heating parameters of the simulated test unit components can be adjusted to adapt to the cell arrangement and heating characteristics of different battery packs. The use of a heating module to simulate the heat generation of the battery can accurately control the heating conditions of the simulated test unit components to be consistent with the heating conditions of the actual battery pack. By adopting a liquid-cooled base plate, the heat dissipation of the battery pack is simulated to improve the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0048] Figure 1It is a schematic diagram of the overall structure of a highly applicable energy storage battery pack temperature uniformity simulation test device of the present invention;

[0049] Figure 2 It is a structural schematic diagram of an embodiment provided by the present invention;

[0050] Figure 3 is a structural schematic diagram of another embodiment provided by the present invention;

[0051] Figure 4 is a schematic diagram of temperature uniformity of an embodiment provided by the present invention;

[0052] Figure 5 is a schematic diagram of temperature uniformity of another embodiment provided by the present invention;

[0053] Figure 6 It is a flow chart of the highly applicable energy storage battery pack temperature uniformity simulation test method of the present invention.

[0054] Reference numerals:

[0055] 1-simulation test unit assembly; 11-test body; 12-heating module; 13-temperature measurement module; 2-cooling module; 21-liquid injection port; 3-auxiliary materials. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0057] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in one or more embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0058] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0059] Example 1

[0060] The embodiment of the present invention provides a highly applicable energy storage battery pack temperature uniformity simulation test device. Figure 1 The overall structure diagram of the highly applicable energy storage battery pack temperature uniformity simulation test device is as follows: Figure 1 As shown, the device comprises:

[0061] A plurality of simulation test unit components 1, a cooling module 2 and auxiliary materials 3;

[0062] The simulation test unit assembly 1 is connected to the cooling module 2 through auxiliary material 3;

[0063] Combination Figure 1-Figure 3 The simulation test unit assembly 1 is used to simulate the heating and heat dissipation state of the battery cells in the battery pack to be tested during the charging process. The simulation test unit assembly 1 is arranged according to the arrangement of the battery cells in the battery pack to be tested.

[0064] The simulation test unit assembly 1 includes a test body 11, a plurality of heating modules 12, a temperature measurement module 13 and a power supply;

[0065] The test body 11 is installed on the cooling module 2, one end of the heating module 12 is installed above the test body 11, the other end of the heating module 12 is connected to the power supply, and the temperature measurement module 13 is arranged at the bottom of one side of the test body 11;

[0066] A plurality of heating modules (12) are evenly distributed above the test body 11, and the heating modules 12 in the plurality of simulation test unit assemblies 1 correspond one to one;

[0067] The heating module 12 is used to simulate the heating of the battery cells in the battery pack to be tested, and can accurately control the heating condition of the simulated test unit assembly 1 to be consistent with the heating condition of the real battery pack.

[0068] Preferably, the material of the test body 11 includes aluminum material, which is used to simulate the battery cells in the battery pack to be tested. The aluminum material can be at least one of AL3003, AL6061 and AL6063. The outer dimensions of the test body 11 are made according to the outer dimensions of the battery cells in the energy storage battery pack.

[0069] The test body 11 is made of aluminum, which has good thermal conductivity and mechanical properties, and can ensure the stability and reliability of the test results.

[0070] In one embodiment, the heating module 12 is a resistance heating module, the power of which is adjustable and the size of which does not exceed the test body 11, thereby avoiding the problem of unstable heat generation caused by the use of an electric heating film.

[0071] Preferably, the temperature measuring module 13 adopts a temperature sensor.

[0072] Preferably, the power supply adopts a power module with the power required by the heating module 12 .

[0073] In one embodiment,

[0074] Each simulation test unit assembly 1 includes a test body 11, two heating modules 12, a temperature measuring module 13 and a power supply. The test body 11 is installed on the cooling module 2, the two heating modules 12 are symmetrically installed at both ends directly above the test body 11, and the temperature measuring module 13 is installed at the bottom of one side of the test body 11.

[0075] Combination Figure 1-Figure 3 , the cooling module 2 is a liquid cooling base plate, including:

[0076] The liquid injection port 21 is used to inject the coolant into the cooling module 2 .

[0077] Preferably, the coolant is an ethylene glycol coolant, i.e., an ethylene glycol aqueous solution;

[0078] Among them, the volume fraction of ethylene glycol is 50%, that is, the volume of ethylene glycol accounts for 50% of the volume of the entire solution;

[0079] The cooling module 2 uses a liquid cooling base plate and injects coolant through the liquid injection port to simulate the heat dissipation of the battery cells in the battery pack to be tested, thereby improving the accuracy of the test.

[0080] Combination Figure 1-Figure 3 Auxiliary material 3 is used to simulate the actual packaging conditions of the battery pack to be tested, including: thermal conductive material and shock-absorbing buffer material, which are respectively used to improve the heat conduction efficiency and reduce the impact of vibration on the test results.

[0081] The heat-conducting material is disposed at the connection between the test body 11 and the cooling module 2;

[0082] The shock-absorbing and buffering material is arranged between the two simulation test unit assemblies 1 .

[0083] Preferably, the thermally conductive material comprises thermally conductive silicone grease;

[0084] Shock-absorbing cushioning materials include ultra-thin foam.

[0085] Figure 6 The flowchart of the highly applicable energy storage battery pack temperature uniformity simulation test method of the present invention is as follows: Figure 6 As shown, the present invention provides a highly applicable energy storage battery pack temperature uniformity test method, using the highly applicable energy storage battery pack temperature uniformity test device as described above to perform the energy storage battery pack temperature uniformity test, the temperature uniformity test method includes:

[0086] S1. Using multiple simulation test unit assemblies 1, simulating the heating condition of the battery pack to be tested, including:

[0087] S101, arranging the simulation test unit assembly 1 according to the arrangement of the battery cells in the battery pack to be tested;

[0088] S102, setting the heating parameters of the simulation test unit assembly 1 according to the heating parameters of the battery cells in the battery pack to be tested, including:

[0089] According to the heating parameters of the battery cells in the battery pack to be tested, the power of the heating module 12 is set;

[0090] Among them, the heating parameters include heating power and temperature;

[0091] The power of the heating module 12 is adjusted according to the temperature parameters of the temperature measuring module 13 so as to be consistent with the heating parameters of the battery cells in the battery pack to be tested.

[0092] S2, start cooling module 2 to simulate the heat dissipation of the battery pack to be tested, including:

[0093] S201, when the temperature of the test body 11 reaches the heating parameter of the battery cell, add a coolant with a set flow rate and temperature into the cooling module 2;

[0094] S202 , adjusting the power of the heating module 12 so that the power of the heating module 12 is consistent with the heating parameter of the battery cell.

[0095] S3. Analyze the temperature uniformity of the battery pack to be tested based on the heating and heat dissipation conditions.

[0096] S301, simulating the heating parameters of the battery cell according to the operating conditions of the energy storage battery pack, and adjusting the heating power of the heating module 12 to keep it consistent with the heating parameters of the battery cell;

[0097] S302, reading and recording the temperature parameters of the temperature measuring module 13 at set time intervals, and drawing a temperature uniformity curve according to the temperature parameters;

[0098] S303, calculating the temperature uniformity of the energy storage battery pack, using the following formula:

[0099]

[0100] in, is the maximum temperature of the measuring point, is the minimum temperature of the measuring point, is the maximum temperature difference, i.e. the temperature uniformity value of the measured battery, t m is the time interval.

[0101] Example 2

[0102] Combination Figure 1 , Figure 2 and Figure 4, this embodiment provides a temperature uniformity simulation test device and method for a 52S energy storage battery pack.

[0103] like Figure 2 The figure shows the structure schematic diagram of the temperature uniformity simulation test device of the 52S energy storage battery pack. A total of 52 simulation test unit assemblies 1 arranged in a 13*4 manner are arranged on the cooling module 2. Each simulation test unit assembly 1 includes a test body 11 and two heating modules 12. The two heating modules 12 are respectively arranged at both ends above the test body 11. The two heating modules 12 on each test body 11 correspond to each other and are located on the same straight line.

[0104] In the y-axis direction, ultra-thin foam is installed between each simulation test unit assembly 1 , that is, ultra-thin foam is installed between each test body 11 .

[0105] The thermal conductive gel is applied to the portion where the test body 11 contacts the cooling module 2 , and the thermal conductive gel is not applied to the area outside the test body 11 .

[0106] After the test starts, the power of the heating module 12 is set to 5W according to the heating power of the battery cells in the battery pack to be tested;

[0107] The power of the heating module 12 is adjusted according to the temperature parameters of the temperature measuring module 13 so as to be consistent with the heating parameters of the battery cells in the battery pack to be tested.

[0108] When the temperature of the test body 11 and the power of the heating module 12 are consistent with the heating parameters of the battery cells in the battery pack to be tested, ethylene glycol coolant with a temperature of 18°C ​​and a flow rate of 5L / min is injected from the water nozzle above the cooling module 2, and the heating power of the battery cells is simulated according to the operating condition of 0.25P. The power of the heating module 12 is adjusted to 5W to be consistent with the heating power of the battery cells.

[0109] During the test, the temperature parameters on the temperature measurement module 13 are continuously read. After the heating module 12 runs continuously for 4 hours, it stops working and keeps the coolant flowing for 10 minutes. Then, the heating module 12 runs continuously for another 4 hours. The temperature uniformity curve is drawn according to the sensor temperature parameters, and the temperature difference, maximum temperature, and minimum temperature of the simulated energy storage battery pack are calculated to analyze the temperature uniformity.

[0110] The test environment temperature is 28℃, the ethylene glycol coolant is 18℃, the recording time interval is 1s / time, and the total test time is 29400s. According to the formula, the maximum temperature, minimum temperature and temperature difference of the temperature measuring point at different times are recorded respectively.

[0111] like Figure 4 As shown, after the test starts, the first time interval, t n =1s,

[0112] Calculate the maximum temperature of the temperature measurement point

[0113] Calculate the minimum temperature of the temperature measurement point

[0114] Calculate the maximum temperature difference

[0115] When the test reaches the 14400th time interval, t n =14400s,

[0116] Calculate the maximum temperature of the temperature measurement point

[0117] Calculate the minimum temperature of the temperature measurement point

[0118] Calculate the maximum temperature difference

[0119] When the test reaches the 29400th time interval, t n =29400s,

[0120] Calculate the maximum temperature of the temperature measurement point

[0121] Calculate the minimum temperature of the temperature measurement point

[0122] Calculate the maximum temperature difference

[0123] The maximum temperature of the temperature measuring point Minimum temperature of the measuring point Test temperature difference The time intervals are 0s, 1s, 2s, ..., 29400s and plotted as follows: Figure 4 The curve graph shown provides an intuitive representation of the temperature uniformity test.

[0124] Among them, temperature uniformity refers to the temperature consistency of all the batteries being tested. Therefore, the temperature difference between the maximum temperature and the minimum temperature of the temperature measuring point at any time can determine its consistency: the larger the temperature difference, the worse the temperature consistency, that is, the worse the temperature uniformity. Figure 4 In the figure, the temperature uniformity is expressed by the temperature difference curve. The temperature difference axis on the right is used as the Y coordinate axis. The closer the temperature difference curve is to 0 on the Y axis, the smaller the temperature difference is and the better the temperature uniformity is.

[0125] Example 3

[0126] Combination Figure 1 , Figure 3 and Figure 5, this embodiment provides a temperature uniformity simulation test device and method for a 104S energy storage battery pack.

[0127] like Figure 3 The figure shows the structure schematic diagram of the temperature uniformity simulation test device of the 104S energy storage battery pack. A total of 104 simulation test unit assemblies 1 arranged in two groups of 13*4 are arranged on the cooling module 2. Each simulation test unit assembly 1 includes a test body 11 and two heating modules 12. The two heating modules 12 are respectively arranged at both ends above the test body 11. The two heating modules 12 on each test body 11 correspond to each other and are located on the same straight line.

[0128] In the y-axis direction, ultra-thin foam is installed between each simulation test unit assembly 1 , that is, ultra-thin foam is installed between each test body 11 .

[0129] The thermal conductive gel is applied to the portion where the test body 11 contacts the cooling module 2 , and the thermal conductive gel is not applied to the area outside the test body 11 .

[0130] After the test starts, the power of the heating module 12 is set to 5W according to the heating power of the battery cells in the battery pack to be tested;

[0131] The power of the heating module 12 is adjusted according to the temperature parameters of the temperature measuring module 13 so as to be consistent with the heating parameters of the battery cells in the battery pack to be tested.

[0132] When the temperature of the test body 11 and the power of the heating module 12 are consistent with the heating parameters of the battery cells in the battery pack to be tested, ethylene glycol coolant with a temperature of 18°C ​​and a flow rate of 10L / min is injected from the water nozzle above the cooling module 2, and the heating power of the battery cells is simulated according to the operating condition of 0.5P. The power of the heating module 12 is adjusted to 5W to be consistent with the heating power of the battery cells.

[0133] During the test, the temperature parameters on the temperature measurement module 13 are continuously read. After the heating module 12 runs continuously for 4 hours, it stops working and keeps the coolant flowing for 10 minutes. Then, the heating module 12 runs continuously for another 4 hours. The temperature uniformity curve is drawn according to the sensor temperature parameters, and the temperature difference, maximum temperature, and minimum temperature of the simulated energy storage battery pack are calculated to analyze the temperature uniformity.

[0134] The test environment temperature is 28℃, the ethylene glycol coolant is 18℃, the recording time interval is 1s / time, and the total test time is 29400s. According to the formula, the maximum temperature, minimum temperature and temperature difference of the temperature measuring point at different times are recorded respectively.

[0135] like Figure 4 As shown, after the test starts, when the first time interval, tn = 1s,

[0136] Calculate the maximum temperature of the temperature measurement point

[0137] Calculate the minimum temperature of the temperature measurement point

[0138] Calculate the maximum temperature difference

[0139] When the test reaches the 14400th time interval, tn = 14400s,

[0140] Calculate the maximum temperature of the temperature measurement point

[0141] Calculate the minimum temperature of the temperature measurement point

[0142] Calculate the maximum temperature difference

[0143] When the test reaches the 29400th time interval, tn = 29400s,

[0144] Calculate the maximum temperature of the temperature measurement point

[0145] Calculate the minimum temperature of the temperature measurement point

[0146] Calculate the maximum temperature difference

[0147] The maximum temperature of the temperature measuring point Minimum temperature of the measuring point Test temperature difference The time intervals are 0s, 1s, 2s, ..., 29400s and plotted as follows: Figure 5 The curve graph shown provides an intuitive representation of the temperature uniformity test.

[0148] Among them, temperature uniformity refers to the temperature consistency of all the batteries being tested. Therefore, the temperature difference between the maximum temperature and the minimum temperature of the temperature measuring point at any time can determine its consistency: the larger the temperature difference, the worse the temperature consistency, that is, the worse the temperature uniformity. Figure 5 In the figure, the temperature uniformity is expressed by the temperature difference curve. The temperature difference axis on the right is used as the Y coordinate axis. The closer the temperature difference curve is to 0 on the Y axis, the smaller the temperature difference is and the better the temperature uniformity is.

[0149] In summary, an embodiment of the present invention relates to a highly applicable energy storage battery pack temperature uniformity simulation test device, comprising: a plurality of simulation test unit assemblies, a cooling module and auxiliary materials; the simulation test unit assembly is connected to the cooling module through the auxiliary materials, the simulation test unit assembly is used to simulate the battery cells in the battery pack to be tested, and the simulation test unit assembly is arranged according to the arrangement of the battery cells in the battery pack to be tested; the simulation test unit assembly comprises a test body, a plurality of heating modules, a temperature measuring module and a power supply; the test body is mounted on the cooling module, one end of the heating module is mounted above the test body, the other end of the heating module is connected to the power supply, and the temperature measuring module is arranged at the bottom of one side of the test body; the plurality of heating modules are evenly distributed above the test body, and the heating modules in the plurality of simulation test unit assemblies correspond one to one; the material of the test body comprises aluminum material; the heating module is used to simulate the heat generated by the battery; the auxiliary materials are used to simulate the actual packaging conditions of the battery pack.

[0150] The technical solution provided by the embodiment of the present invention uses aluminum blocks instead of battery cells, which can reduce construction period and cost without affecting the test, and can simulate the heating and heat dissipation of different battery packs, and is suitable for temperature uniformity testing of various energy storage battery packs. The arrangement and heating parameters of the simulation test unit assembly can be adjusted to adapt to the cell arrangement and heating characteristics of different battery packs. The entire simulation test unit assembly can be assembled and installed according to the test requirements, and can be easily disassembled and reused after the test is completed, with the outstanding advantages of low cost and extremely high compatibility. Using a heating module to simulate the heat generation of the battery can accurately control the heating condition of the simulation test unit assembly, which is consistent with the heating condition of the real battery pack. By adopting a liquid-cooled base plate, the heat dissipation of the battery pack is simulated to improve the accuracy of the test.

[0151] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A highly applicable energy storage battery pack temperature uniformity simulation test device, characterized in that: The device comprises: a plurality of simulation test unit components (1), a cooling module (2) and auxiliary materials (3); The simulation test unit assembly (1) is connected to the cooling module (2) via the auxiliary material (3); the simulation test unit assembly (1) is used to simulate the heating and heat dissipation state of the battery cells in the battery pack to be tested during the charging process; the simulation test unit assembly (1) is arranged according to the arrangement of the battery cells in the battery pack to be tested; The simulation test unit assembly (1) comprises a test body (11), a plurality of heating modules (12), a temperature measurement module (13) and a power source; The test body (11) is mounted on the cooling module (2), one end of the heating module (12) is mounted above the test body (11), the other end of the heating module (12) is connected to the power supply, and the temperature measurement module (13) is arranged at the bottom of one side of the test body (11); The plurality of heating modules (12) are evenly distributed above the test body (11), and the heating modules (12) in the plurality of simulation test unit assemblies (1) correspond one to one.

2. The device according to claim 1, characterized in that The cooling module (2) is a liquid cooling base plate, comprising: A liquid injection port (21), the liquid injection port (21) is used to inject cooling liquid into the cooling module (2).

3. The device according to claim 1, characterized in that The material of the test body (11) includes aluminum material, which is used to simulate the battery cells in the battery pack to be tested; The heating module (12) is used to simulate the heating value of the battery cells in the battery pack to be tested; The cooling module (2) is used to simulate the heat dissipation of the battery cells in the battery pack to be tested; The auxiliary material (3) is used to simulate the actual packaging conditions of the battery pack to be tested.

4. The device according to claim 1, characterized in that The auxiliary materials (3) include: heat-conducting materials and shock-absorbing and buffering materials; The heat-conducting material is arranged at the connection between the test body (11) and the cooling module (2); The shock-absorbing and buffering material is arranged between two simulation test unit assemblies (1).

5. The device according to claim 4, characterized in that The heat-conducting material includes heat-conducting silicone grease; The shock-absorbing and buffering material includes ultra-thin foam.

6. A highly applicable energy storage battery pack temperature uniformity simulation test method, characterized in that: The energy storage battery pack temperature uniformity test is performed using the highly applicable energy storage battery pack temperature uniformity test device as described in any one of claims 1 to 5, and the temperature uniformity test method includes: Use multiple simulation test unit components to simulate the heating condition of the battery pack to be tested; Start the cooling module to simulate the heat dissipation of the battery pack to be tested; The temperature uniformity of the battery pack to be tested is analyzed based on the heating and heat dissipation conditions.

7. The method according to claim 6, characterized in that The method of using the simulation test unit assembly to simulate the heating condition of the battery pack to be tested includes: Arrange the simulation test unit components according to the arrangement of the cells in the battery pack to be tested; According to the heating parameters of the battery cells in the battery pack to be tested, the heating parameters of the simulated test unit components are set.

8. The method according to claim 7, characterized in that The step of setting the heating parameters of the simulation test unit assembly according to the heating parameters of the battery cells in the battery pack to be tested includes: Set the power of the heating module according to the heating parameters of the battery cells in the battery pack to be tested; Wherein, the heating parameters include heating power and temperature; The power of the heating module is adjusted according to the temperature parameters of the temperature measuring module to keep it consistent with the heating parameters of the battery cells in the battery pack to be tested.

9. The method according to claim 8, characterized in that The starting cooling module simulates the heat dissipation of the battery pack to be tested, including: When the temperature of the test body reaches the heating parameter of the battery cell, add coolant with set flow rate and temperature to the cooling module; The power of the heating module is adjusted so that the power of the heating module is consistent with the heating parameters of the battery cell.

10. The method according to claim 9, characterized in that The analyzing the temperature uniformity of the battery pack to be tested includes: Simulate the heating parameters of the battery cells according to the operating conditions of the energy storage battery pack, and adjust the heating power of the heating module to keep it consistent with the heating parameters of the battery cells; Read and record the temperature parameters of the temperature measuring module at set time intervals, and draw a temperature uniformity curve based on the temperature parameters; To calculate the temperature uniformity of the energy storage battery pack, use the following formula: in, is the maximum temperature of the measuring point, is the minimum temperature of the measuring point, is the maximum temperature difference, i.e. the temperature uniformity value of the measured battery, t m is the time interval.

Images