Battery cell testing device

Abstract

The utility model relates to the technical field of battery testing, in particular to a battery cell testing device. The cell testing device comprises a plurality of testing boxes, a temperature control assembly and a monitoring assembly, the testing boxes are provided with testing cavities for testing cells, the testing assemblies are arranged in the testing boxes, and the number of the testing boxes is multiple; the temperature control assembly comprises a compressor, a plurality of first loops and a plurality of first heat exchangers, the first loops are in one-to-one correspondence with the test cavities, each first loop is connected with the compressor and at least one first heat exchanger, and each test cavity is matched with at least one first heat exchanger; the monitoring assembly comprises a controller and a first monitor, the controller is electrically connected with the first monitor, the compressor and the first heat exchanger, each test cavity is provided with the first monitor, and the first monitor can monitor the temperature in the test cavity. The compressor is connected with the plurality of first heat exchangers, so that the number of the compressors in the battery cell testing device is reduced, the size of the whole battery cell testing device is reduced, and the manufacturing cost and the energy consumption of the battery cell testing device are reduced.

Description

Technical Field

[0001] This application relates to the field of battery testing technology, and in particular to a battery cell testing device. Background Technology

[0002] In traditional battery cell testing equipment, the battery cells are placed in a test chamber, and the test module performs various tests on the battery cells, such as charging and discharging. Since the battery cells release heat during charging and discharging, the ambient temperature inside the test chamber may not meet the testing requirements. Therefore, each test chamber needs to be equipped with a compressor and an evaporator. The temperature of the test chamber is regulated by the evaporator. This results in a large volume of test chambers and the overall battery cell testing equipment, which occupies more space. At the same time, multiple compressors also increase the cost and energy consumption, which is extremely detrimental to the control of production costs. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a battery cell testing device.

[0004] The test box has a test chamber for testing the power supply core, and the test box contains multiple test components.

[0005] A temperature control component includes a compressor, multiple first circuits, and multiple first heat exchangers. Each first circuit corresponds to a test chamber. Each first circuit is connected to the compressor and at least one first heat exchanger. The first heat exchanger is capable of cooling or heating and regulating the temperature inside the test chamber. Each test chamber is matched with at least one first heat exchanger.

[0006] The monitoring component includes a controller and a first monitor. The controller is electrically connected to the first monitor, the compressor, and the first heat exchanger. Each test chamber is equipped with the first monitor, which is capable of monitoring the temperature inside the test chamber.

[0007] Optionally, the temperature control assembly further includes a second heat exchanger and a throttle valve, both electrically connected to the controller. One of the second heat exchanger and the first heat exchanger is an evaporator, and the other is a condenser. Each first loop is connected to the second heat exchanger, and in each first loop, the second heat exchanger is connected between the compressor and the first heat exchanger.

[0008] Each of the first loops is connected to the throttle, and in each of the first loops, the throttle is connected between the second heat exchanger and the first heat exchanger; or, there are multiple throttles, and each of the first loops is connected to one of the throttles, with the throttle connected between the second heat exchanger and the first heat exchanger.

[0009] Optionally, the first heat exchanger is disposed in the corresponding test chamber; or, the temperature control component further includes a plurality of first air ducts and a plurality of first fans, the first air ducts corresponding one-to-one with the test chambers and connected, the first fans being electrically connected to the controller, and the first fans enabling the cold or hot airflow generated by the first heat exchanger to reach the test chamber through the first air ducts.

[0010] Optionally, the cell testing device further includes a liquid cooling assembly, which includes multiple liquid cooling plates. At least one liquid cooling plate is provided in each test chamber, and the liquid cooling plate is used to cool the cell.

[0011] Optionally, the liquid cooling assembly further includes a second circuit and a refrigerant tank. The second circuit is provided in multiple ways and corresponds one-to-one with the test chamber. The refrigerant tank is used to store refrigerant. Each second circuit is connected to the refrigerant tank. The liquid cooling plate is provided with a refrigerant flow channel. The liquid cooling plate is connected to the corresponding second circuit, and the refrigerant flow channel is in communication with the second circuit.

[0012] The monitoring component also includes a second monitor, which is provided in multiples and is electrically connected to the controller. Each second loop is provided with a second monitor, which is used to monitor the temperature of the refrigerant in the refrigerant box.

[0013] Optionally, the temperature control assembly further includes a third loop and a third heat exchanger. The third loop is connected to the compressor, and the third heat exchanger is connected to the third loop and electrically connected to the controller. The third heat exchanger is capable of exchanging heat with the refrigerant in the refrigerant box.

[0014] Optionally, the liquid cooling assembly further includes a heater disposed in the refrigerant tank, the heater being electrically connected to the controller and used to heat the refrigerant.

[0015] Optionally, a support component is fixed inside the test chamber, and the liquid cooling plate has a first mounting position and a second mounting position;

[0016] When the liquid cooling plate is in the first mounting position, the liquid cooling plate can support the battery cell and cool the battery cell;

[0017] When the liquid cooling plate is in the second mounting position, the liquid cooling plate and the carrier are spaced apart. The side of the carrier facing the liquid cooling plate is used to support the battery cell. The liquid cooling plate can contact the battery cell and cool it.

[0018] Optionally, the test chamber is provided with a screw and a guide. The screw is rotatably connected to the test chamber, the liquid cooling plate is screwed to the screw, and the liquid cooling plate is guided to the guide. The screw can rotate and move the liquid cooling plate closer to or away from the carrier.

[0019] Optionally, the testing component includes a charge-discharge testing module, which is used to connect the battery cell and perform charge-discharge tests; the battery cell testing device also includes a rack, on which all the test boxes are mounted.

[0020] In some implementations of this application, the battery cell testing device described in the embodiments of this application includes a test chamber, a temperature control component, and a monitoring component. The test chamber houses the test component for connecting the battery cell to be tested. The temperature control component includes a compressor and multiple first heat exchangers connected to the compressor. The monitoring component includes a controller and a first monitor, and the controller is electrically connected to a first detector, the compressor, and the first heat exchangers.

[0021] The test chamber has multiple chambers, each equipped with at least one first heat exchanger to regulate the temperature within the chamber by heating or cooling. Each test chamber is also equipped with a first monitor to monitor the temperature within the chamber.

[0022] In the battery cell testing device described in this application embodiment, a single compressor is connected to multiple first heat exchangers. Compared with the existing battery cell testing device where one compressor is configured for each first heat exchanger, the number of compressors is greatly reduced, which helps to save the volume of the entire battery cell testing device. With the same number of test chambers, fewer compressors also help to reduce the cost and energy consumption of the battery cell testing device, thereby reducing the hardware and energy costs during battery cell testing.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of the structure of the test box described in some embodiments of this application;

[0026] Figure 2 This is a schematic diagram of the temperature control component using the first connection method in some embodiments of this application;

[0027] Figure 3This is a schematic diagram of the temperature control component using the second connection method in some embodiments of this application;

[0028] Figure 4 This is a connection diagram of the monitoring components described in some embodiments of this application;

[0029] Figure 5 This is a schematic diagram of the structure in some embodiments of this application where the first heat exchanger and the test chamber exchange heat using a first configuration method;

[0030] Figure 6 This is a schematic diagram of the structure in some embodiments of this application where the first heat exchanger and the test chamber exchange heat using a second arrangement.

[0031] Figure 7 This is a schematic diagram of the structure of the liquid cooling assembly described in some embodiments of this application;

[0032] Figure 8 This is a schematic diagram of the structure of the liquid cooling plate described in some embodiments of this application;

[0033] Figure 9 This is a schematic diagram of the structure of the carrier, liquid cooling plate, guide and screw described in some embodiments of this application when the battery cell is in the first test state;

[0034] Figure 10 This is a schematic diagram of the structure of the carrier, liquid cooling plate, guide and screw described in some embodiments of this application when the battery cell is in the second test state;

[0035] Figure 11 These are schematic diagrams of the structure of the support member and liquid cooling plate described in some embodiments of this application;

[0036] Figure 12 This is a front view of the cell testing apparatus described in some embodiments of this application.

[0037] Reference numerals: 100, Test chamber; 100a, Chamber body; 100b, Chamber door; 101, Test cavity; 102, Test assembly; 1021, Charge / discharge test module; 103, Supporting component; 104, Screw; 105, Guide component; 106, Humidity sensor; 107, Humidifying pipe; 200, Temperature control assembly; 201, Compressor; 202, First heat exchanger; 203, Second heat exchanger; 204, Throttling device; 205, First fan; 206, First air duct; 207, Third heat exchanger; 300, Monitoring... Control components; 301, Controller; 302, First monitor; 303, Second monitor; 304, Third monitor; 400, Liquid cooling components; 401, Liquid cooling plate; 4011, Refrigerant flow channel; 4012, Serpentine tube; 4013, Base plate; 402, Refrigerant tank; 403, Heater; 404, Flow meter; 405, Adjustable water pump; 406, First vent valve; 407, Control valve; 408, Liquid filling pump; 409, Storage tank; 410, Second vent valve; 500, Frame; 1000, Battery cell. Detailed Implementation

[0038] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0039] Cell performance testing is a crucial step in evaluating the core functions of a battery cell. Existing cell performance testing includes basic electrical performance testing, dynamic performance testing, cycle and life testing, efficiency testing, self-discharge testing, and temperature characteristic testing. Basic electrical performance testing typically includes capacity testing, energy density testing, and internal resistance testing. Dynamic performance testing generally includes rate performance testing and power characteristic testing. These tests ensure that the actual performance of the battery cell, such as energy density and cycle life, matches the theoretical conditions established during the design phase, preventing batch defects in mass-produced cells.

[0040] In battery cell performance testing, some tests require charging and discharging the cells. During charging and discharging, the cells rapidly generate a large amount of heat, causing a sharp rise in the cell surface temperature. This not only affects the temperature stability of the testing environment but may also pose safety hazards. Therefore, existing battery cell testing equipment typically includes a test chamber to house the cells. Temperature control within the test chamber is primarily achieved through evaporators, each equipped with a compressor, a condenser, and a throttling valve.

[0041] Existing battery cell testing equipment typically has multiple test chambers to test a large number of cells simultaneously. Since each test chamber is equipped with components such as an evaporator, compressor, and condenser, the overall battery cell testing equipment not only occupies a large space but also consumes a lot of energy, leading to a sharp increase in both manufacturing and testing costs.

[0042] To address the aforementioned problems, this utility model provides a battery cell testing device. The battery cell testing device described in this utility model includes a testing chamber 100, a temperature control component 200, and a monitoring component 300.

[0043] refer to Figure 1 The test chamber 100 is a structure used to house the battery cell 1000 and provide a testing environment for the battery cell 1000 under test. The specific structure of the test chamber 100 can be determined according to actual needs. Typically, the test chamber 100 includes a chamber body 100a with an opening, and a door 100b that can be rotated or slid open can be connected to the opening of the chamber body 100a. The test chamber 100 has a test cavity 101 for testing the battery cell 1000. The shape and size of the test cavity 101 are set according to actual testing needs. A test assembly 102 is provided inside the test cavity 101 of the test chamber 100. The test assembly 102 can be selected according to the specific test items. For example, when performing charge-discharge tests, the test assembly 102 can be a charge-discharge tester. The battery cell 1000 can be electrically connected to the charge-discharge tester to test the charge-discharge performance of the battery cell 1000. When performing internal resistance tests, the test assembly 102 can be an internal resistance tester. The internal resistance tester is electrically connected to the battery cell 1000 to detect its internal resistance. Multiple test chambers 100 are typically provided; the number can be three, four, five, or even more. The specific number of test chambers 100 depends on the actual testing needs and will not be elaborated here.

[0044] It should be noted that multiple test chambers 100 can be set up independently or as a whole, which is equivalent to a single box containing multiple test chambers 101, which will not be described in detail here.

[0045] refer to Figure 2 , Figure 3 The temperature control component 200 is a component for controlling the ambient temperature of the test chamber 101 of the test chamber 100. Specifically, it includes a compressor 201, multiple first circuits, and multiple first heat exchangers 202. Each first circuit corresponds one-to-one with a test chamber 101. Each first circuit is connected to the compressor 201 and at least one first heat exchanger 202. The first heat exchanger 202 can cool or heat and regulate the temperature inside the test chamber 101, and each test chamber 101 is matched with at least one first heat exchanger 202.

[0046] In the same battery cell testing device, the number of first heat exchangers 202 can be no less than the number of test chambers 101, ensuring that each test chamber 101 is matched with at least one first heat exchanger 202. That is, each test chamber 101 is heated or cooled by at least one first heat exchanger 202, improving temperature control efficiency. Alternatively, the number of first heat exchangers 202 can be the same as the number of test chambers 101, so that each test chamber 101 corresponds to one first heat exchanger 202, ensuring that each test chamber 101 has a corresponding first heat exchanger 202 for heating or cooling. The first heat exchanger 202 is connected to the compressor 201 through a first circuit. During use, a heat exchange medium, such as Freon, circulates within the first circuit, the first heat exchanger 202, and the compressor 201, forming a circulating loop to achieve continuous cooling or heating. The first heat exchanger 202 can specifically be an evaporator or a condenser. When the first heat exchanger 202 is an evaporator, the heat exchange medium evaporates and absorbs heat when passing through the first heat exchanger 202, thereby cooling and ultimately reducing the temperature of the test chamber 101. When the heat exchange medium is reversed, it generates heat, which will not be elaborated further.

[0047] It should be noted that:

[0048] The fact that multiple first circuits correspond one-to-one with multiple test chambers 101 means that each test chamber 101 corresponds to one circuit, and the temperature of the test chamber 101 is adjusted by the cooling or heating generated by the first heat exchanger 202 provided on the first circuit.

[0049] Each first loop is connected to a compressor 201 and at least one first heat exchanger 202, meaning that each first loop is equipped with a compressor 201 and at least one first heat exchanger 202. Figure 2As shown, since there are multiple first loops, all of them are connected to the same compressor 201, and each first loop is connected to a first heat exchanger 202. For the overall cell testing device, one scenario is that there is only one compressor 201, which is shared by all the first heat exchangers 202, meaning all first circuits are connected to this compressor 201. Another scenario is that there can be multiple compressors 201, but the number of first heat exchangers 202 is greater than the number of compressors 201. Each compressor 201 can be matched with at least one first heat exchanger 202. For example, there are two compressors 201 in total, and each compressor 201 is matched with four first heat exchangers 202, meaning four first heat exchangers 202 share one compressor 201, for a total of eight first heat exchangers 202 and two compressors 201. Regardless of the scenario, each first circuit is connected to a compressor 201 and at least one first heat exchanger 202. Compared to the traditional structure where one compressor 201 is matched with only one first heat exchanger 202, this significantly reduces the number of compressors used, lowers energy consumption, and reduces the size and space occupied by the equipment. (Reference) Figure 4 The monitoring component 300 includes a controller 301 and a first monitor 302. Multiple first monitors 302 are provided, and each test chamber 101 is equipped with a first monitor 302. (Reference) Figure 4 The controller 301 is electrically connected to the first monitor 302, the compressor 201, and the first heat exchanger 202. During cell performance testing, the first monitor 302 monitors the ambient temperature inside the test chamber 101 and promptly feeds the temperature data back to the controller 301. When the ambient temperature inside the test chamber 101 changes, the controller 301 responds promptly and controls the compressor 201 and the first heat exchanger 202 to regulate the temperature inside the test chamber 101, ensuring that the temperature inside the test chamber 101 remains stable at the preset test temperature. The first monitor 302 can be an electronic temperature sensor, an electronic temperature probe, or a thermometer, etc. It should be noted that the first monitor 302 can monitor the temperature inside the test chamber 101 in real time and feed it back to the controller 301 in real time, or it can monitor at intervals, such as every 3 or 5 minutes, and feed it back to the controller 301; further details will not be elaborated here.

[0050] With the same number of test chambers 100, the cell testing device described in this application embodiment can arrange fewer compressors 201 compared to existing battery testing devices, which helps to reduce the cost and energy consumption of the cell testing device, thereby reducing the hardware and energy costs of cell 1000 testing.

[0051] In one embodiment, a single test chamber 100 may have only one test cavity 101, or it may have two, three, four, or even more test cavities 101. That is, the number of test cavities 101 is not less than the number of test chambers 100. Each test cavity 101 corresponds to at least one first heat exchanger 202, that is, the number of first heat exchangers 202 matched to each test cavity 101 is not less than the number of test cavities 101. For example, a cell testing device may have four test chambers 100, each test chamber 100 has four test cavities 101, and each test cavity 101 corresponds to one first heat exchanger 202, that is, the cell testing device has a total of 16 first heat exchangers 202 and one compressor 201; the 16 first heat exchangers 202 can be connected to one compressor 201 simultaneously so that the heat exchange medium can be pumped through the same compressor 201.

[0052] In some embodiments of this invention, the temperature control assembly 200 further includes a second heat exchanger 203 and a throttling device 204. (See reference) Figure 4 The second heat exchanger 203 and the throttle valve 204 are both electrically connected to the controller 301 so that they can be started or stopped under the control of the controller 301.

[0053] like Figure 2 and Figure 3 As shown, one of the second heat exchanger 203 and the first heat exchanger 202 is an evaporator, and the other is a condenser. Each first loop is connected to the second heat exchanger 203, and in each first loop, the second heat exchanger 203 is connected between the compressor 201 and the first heat exchanger 202. Wherein:

[0054] In the first embodiment, each first loop is connected to a throttle 204, and in each first loop, the throttle 204 is connected between the second heat exchanger 203 and the first heat exchanger 202.

[0055] In the second embodiment, multiple throttles 204 are provided, and each first circuit is connected to a throttle 204. The throttle 204 is connected between the second heat exchanger 203 and the first heat exchanger 202.

[0056] refer to Figure 2In the first embodiment, there is one second heat exchanger 203 and one compressor 201, and only one throttling device 204. Multiple first heat exchangers 202 are provided; for example, the first heat exchanger 202 can be an evaporator, and the second heat exchanger 203 can be a condenser. In this case, each first loop connects the throttling device 204, the second heat exchanger 203, and the compressor 201. However, each first loop also has at least one first heat exchanger 202. That is, in all first loops, the compressor 201, the second heat exchanger 203, and the throttling device 204 are shared, thereby reducing the number of compressors 201, the second heat exchanger 203, and the throttling device 204.

[0057] Taking the refrigeration of the first heat exchanger 202 as an example, the circulation of the first loop is explained. When the first heat exchanger 202 is an evaporator and the second heat exchanger 203 is a condenser, the heat exchange medium circulates in the first loop and flows sequentially through the compressor 201, the first heat exchanger 202, the throttle 204, and the second heat exchanger 203, and then flows back to the compressor 201, forming a cycle. When the heat exchange medium flows through the first heat exchanger 202, it absorbs heat and refrigerates, and the resulting cooling can directly lower the temperature inside the test chamber 101, or be transferred to the test chamber 101 for cooling through pipelines. When it flows through the second heat exchanger, it dissipates heat, which will not be elaborated further.

[0058] like Figure 3 As shown, in the second embodiment, there are multiple throttles 204 and second heat exchangers 203. Each first circuit is connected to the compressor 201, and each first circuit is provided with a throttle 204, a second heat exchanger 203 and at least one first heat exchanger 203.

[0059] Of course, in the second embodiment, when there are multiple throttles 204, there may be only one second heat exchanger 203. In this case, each first loop is connected to the compressor 201 and the second heat exchanger 203, and each first loop is provided with a throttle 204 and at least one first heat exchanger 203. This is equivalent to each first loop sharing the compressor 201 and the second heat exchanger 203, which will not be described in detail here.

[0060] Furthermore, the throttle 204 can be a throttle valve. The heat exchange medium can be water, or other media such as Freon.

[0061] In some embodiments of this application, the first heat exchanger 202 regulates the temperature of the test chamber 101 in two ways.

[0062] refer to Figure 5In the first configuration, the first heat exchanger 202 can be located within the corresponding test chamber 101. That is, each test chamber 101 has at least one first heat exchanger 202, and the first heat exchanger 202 can directly exchange heat with the air inside the test chamber 101. This improves the heat exchange efficiency between the first heat exchanger 202 and the test chamber 101, which helps to quickly adjust the ambient temperature inside the test chamber 101 to the preset temperature, thus better ensuring the accuracy of the test results.

[0063] In the second configuration, the temperature control component 200 also includes multiple first air ducts 206 and multiple first fans 205. The first air ducts 206 correspond one-to-one with and are connected to the test chamber 101, and the first fans 205 enable the cold or hot airflow generated by the first heat exchanger 202 to reach the test chamber 101 through the first air ducts 206.

[0064] In this embodiment, the first air duct 206 can specifically be a ventilation pipe. In other embodiments, the first air duct 206 can also be a ventilation channel formed on the test chamber 100 and connected to the test cavity 101. The first fan 205 can be located inside the first air duct 206 or at the port of the first air duct, and can guide the hot or cold air generated by the first heat exchanger 202 into the test cavity 101. The first fan 205 can specifically be a fan or a blower, etc. The hot or cold air generated by the first heat exchanger 202 refers to the airflow formed by the surrounding air being heated or cooled after the first heat exchanger 202 exchanges heat with the surrounding air.

[0065] refer to Figure 4 The first fan 205 is also electrically connected to the controller 301. When the ambient temperature data of the test chamber 101 monitored by the first monitor 302 changes, the controller 301 can start the first heat exchanger 202, the compressor 201, and the first fan 205. The first fan 205 sends the cold or hot airflow generated by the first heat exchanger 202 into the test chamber 101 through the first air duct 206 to change the ambient temperature inside the test chamber 101. Since this arrangement allows the first heat exchanger 202 to be placed outside the test chamber 101, thereby reducing the space occupied inside the test chamber 101, it is beneficial to further reduce the volume of the test chamber 100 and at the same time reduce the material cost of the test chamber 100.

[0066] refer to Figure 6 In some embodiments of this application, the cell testing apparatus further includes a liquid cooling assembly 400. The liquid cooling assembly 400 specifically includes a plurality of liquid cooling plates 401, and at least one liquid cooling plate 401 is provided in each test chamber 101. During cell performance testing, the liquid cooling plate 401 can contact the cell 1000 and cool the cell 1000.

[0067] The liquid cooling component 400 helps reduce the heat generated by the battery cell 1000, thereby reducing the impact of the battery cell 1000's heat generation on the ambient temperature inside the test chamber 101. Furthermore, the liquid cooling component 400 can simulate the liquid cooling environment of the liquid cooling plate installed inside the battery pack, thus making the test conditions of the battery cell 1000 during performance testing closer to its actual operating conditions in real-world use.

[0068] refer to Figure 7 In some embodiments of this application, the liquid cooling assembly 400 further includes a second circuit and a refrigerant tank 402. Multiple second circuits are provided and correspond one-to-one with the test chamber 101. The refrigerant tank 402 is used to store refrigerant. Each second circuit is connected to the refrigerant tank 402. The liquid cooling plate 401 is provided with a refrigerant flow channel 4011. The liquid cooling plate 401 is connected to the corresponding second circuit, and the refrigerant flow channel 4011 is in communication with the second circuit.

[0069] The refrigerant tank 402 stores a refrigerant, which can be water. Each second circuit is connected to the refrigerant tank 402 so that the refrigerant can circulate within the second circuit. The liquid cooling plate 401 is connected to the second circuit through the refrigerant flow channel 4011, so that the refrigerant in the second circuit can flow through the refrigerant flow channel 4011 within the liquid cooling plate 401, thereby cooling the battery cell 1000.

[0070] The refrigerant in the refrigerant box 402 can flow into the refrigerant channel 4011 of the liquid cooling plate 401 and exchange heat with the battery cell 1000 in contact with the liquid cooling plate 401. (Reference) Figure 8 Specifically, the liquid cooling plate 401 may include a serpentine tube 4012 and a substrate 4013. The serpentine tube 4012 is an S-shaped through-tube, and its inner cavity is the refrigerant flow channel 4011. The substrate 4013 is generally made of a metal or alloy with good thermal conductivity, such as aluminum or copper, and has mounting grooves on it, in which the serpentine tube 4012 can be installed. Generally, there are two substrates 4013, and the mounting grooves of the two substrates 4013 can be combined to form a mounting cavity, in which the serpentine tube 4012 is installed.

[0071] The monitoring component 300 also includes a second monitor 303. Multiple second monitors 303 are provided and are all electrically connected to the controller 301. Each second loop is provided with a second monitor 303. The second monitor 303 is used to monitor the temperature of the refrigerant in the refrigerant box 402.

[0072] Multiple second monitors 303 are provided, and each refrigerant channel 4011 is provided with at least one second monitor 303. The second monitor 303 can monitor the temperature of the refrigerant flowing in the corresponding second circuit. Specifically, the second monitor 303 can be set at the inlet of the refrigerant channel 4011, at the outlet of the refrigerant channel 4011, or even inside the refrigerant channel 4011. For the same refrigerant channel 4011, two, three, four, or even more second monitors 303 can be set. In the embodiments of this application, the same refrigerant channel 4011 can be provided with two second monitors 303. The two second monitors 303 are respectively set near the inlet and outlet of the refrigerant channel 4011 to monitor the temperature of the refrigerant flowing into and out of the refrigerant channel 4011 in real time.

[0073] The second monitor 303 can specifically be an electronic temperature sensor, an electronic temperature probe, a thermometer, etc. (See reference) Figure 4 The second monitor 303 is electrically connected to the controller 301 to feed back the monitored temperature data to the controller 301. The second monitor 303 is configured to monitor the temperature of the cooling medium in real time, which helps to keep the temperature of the liquid cooling plate 401 within a preset range. This helps ensure the heat dissipation effect of the battery cell 1000 during testing and also helps ensure the accuracy of the liquid cooling plate 401 in simulating the actual liquid cooling environment of the battery cell 1000 during use.

[0074] refer to Figure 7 In this embodiment of the application, a flow meter 404 and an adjustable water pump 405 may also be provided on the second circuit. The flow meter 404 and the adjustable water pump 405 are connected between the liquid cooling plate 401 and the refrigerant tank 402 to adjust the flow rate of the refrigerant flowing into the liquid cooling plate 401, thereby controlling the cooling capacity of the battery cell 1000. For example, when the flow rate of the refrigerant is large, the cooling capacity is strong, while when the flow rate is small, the cooling capacity is low.

[0075] The refrigerant tank 402 may also be equipped with a first vent valve 406, which can adjust the gas pressure inside the refrigerant tank 402. The refrigerant tank 402 may also be equipped with a control valve 407, a refrigerant pump 408, a storage tank 409, and a second vent valve 410. The control valve 407 is connected to the refrigerant tank 402, the refrigerant pump 408 is connected to the control valve 407, the storage tank 409 is connected to the refrigerant pump 408, and the second vent valve 410 is connected to the storage tank 409. The control valve 407, the refrigerant pump 408, the first vent valve 406, and the second vent valve 410 are all electrically connected to the controller 301. When the refrigerant pump 408 starts, the refrigerant in the storage tank 409 can be replenished into the refrigerant tank 402. The control valve 407 can control the flow rate of the refrigerant replenished into the refrigerant tank 402, and the second vent valve 410 can adjust the gas pressure inside the storage tank 409.

[0076] refer to Figure 2 , Figure 3 In some embodiments of this application, the temperature control assembly 200 further includes a third loop and a third heat exchanger 207, the third loop being connected to the compressor 201. (See reference...) Figure 4 The third heat exchanger 207 is connected to the third circuit and electrically connected to the controller 301. The third heat exchanger 207 can exchange heat with the refrigerant in the refrigerant tank 402. Specifically, the third heat exchanger 207 can be a condenser or an evaporator. The third heat exchanger 207 can exchange heat with the refrigerant in the refrigerant tank 402 and regulate the temperature of the refrigerant in the refrigerant tank 402. Figure 2 As shown, the third heat exchanger 207 can be of the same type as the first heat exchanger 202, i.e., both are evaporators or condensers, and share a throttling device 204, a second heat exchanger 203, and a compressor 201 with the first heat exchanger 202, thereby forming a recyclable third loop. The third heat exchanger 207 can exchange heat with the refrigerant in the refrigerant tank 402, for example, cooling or heating the refrigerant in the refrigerant tank 402. The third heat exchanger 207 can be installed outside the refrigerant tank 402 to cool or heat the tank body of the refrigerant tank 402 by outputting cold or hot air, thereby indirectly exchanging heat with the refrigerant; of course, in other embodiments, the third heat exchanger 207 can be directly installed inside the refrigerant tank 402 to directly exchange heat with the refrigerant inside the refrigerant tank 402; in addition, the third heat exchanger 207 can also be attached to the refrigerant tank 402, and achieve heat exchange with the refrigerant through the refrigerant tank 402.

[0077] After receiving the temperature data of the cooling medium from the second monitor 303, if the temperature of the cooling medium differs from the preset temperature, the controller 301 can activate the third heat exchanger 207 and the compressor 201 to change the temperature of the cooling medium. This ensures that the temperature of the liquid cooling plate 401 is at the preset temperature, thereby guaranteeing the cooling effect of the battery cell 1000 during testing. Simultaneously, this also simulates the liquid cooling environment of the battery cell 1000 in actual use as accurately as possible.

[0078] refer to Figure 7 In some embodiments of this application, the liquid cooling assembly 400 further includes a heater 403 electrically connected to the controller 301. The heater 403 may specifically be a heating wire, heating tube, or other similar device. The heater 403 may be disposed within the refrigerant tank 402 to directly exchange heat with the refrigerant medium within the tank 402. Alternatively, the heater 403 may be disposed outside the refrigerant tank 402 and in contact with it, using the tank 402 as the heat exchange path to achieve heat exchange with the refrigerant medium. After the controller 301 receives the temperature data of the refrigerant medium monitored by the second monitor 303, if the temperature of the refrigerant medium is lower than a preset temperature, the controller 301 may control the heater 403 to start, thereby raising the temperature of the refrigerant medium within the refrigerant tank 402. This ensures that the temperature of the liquid cooling plate 401 is at the preset temperature, thereby ensuring that the battery cell 1000 is in a preset simulated liquid cooling environment during testing, preventing the temperature of the refrigerant medium from falling excessively below the actual liquid cooling environment of the battery cell 1000 in the battery pack.

[0079] refer to Figure 7 To facilitate monitoring the temperature of the refrigerant inside the refrigerant box 402, a third monitor 304 can be installed inside the refrigerant box 402. (Reference) Figure 4 The third monitor 304 can be a temperature sensor electrically connected to the controller 301. The third monitor 304 can collect the temperature of the refrigerant in the refrigerant box 402 and transmit the temperature data to the controller 301.

[0080] It should be noted that when the third heat exchanger 207 functions as an evaporator, it cools the refrigerant in the refrigerant tank 402. During this process, the heater 403 remains off to avoid interfering with the third heat exchanger 207. Similarly, when the heater 403 is on, the third heat exchanger 207 remains off to avoid interfering with it. When the third heat exchanger 207 functions as a condenser, it heats the refrigerant in the refrigerant tank 402. During this process, the heater 403 can be simultaneously activated and work in conjunction with the third heat exchanger 207 to improve heating efficiency.

[0081] refer to Figure 9 , Figure 10In some embodiments of this application, a support member 103 is fixedly installed inside the test chamber 100, and the liquid cooling plate 401 has a first mounting position and a second mounting position. Wherein:

[0082] like Figure 9 As shown, when the liquid cooling plate 401 is in the first mounting position, the liquid cooling plate 401 can support the battery cell 1000 and cool the battery cell 1000. At this time, the battery cell 1000 is placed in the test chamber 101 for testing, that is, the electrode terminals of the battery cell 1000 are placed upwards.

[0083] like Figure 10 As shown, when the liquid cooling plate 401 is in the second mounting position, the liquid cooling plate 401 and the carrier 103 are spaced apart. The side of the carrier 103 facing the liquid cooling plate 401 is used to support the battery cell 1000. The liquid cooling plate 401 can contact the battery cell 1000 and cool the battery cell 1000.

[0084] The support member 103 can be a plate structure, a tray structure, or a frame structure. The support member 103 can be detachably fixed inside the test chamber 101.

[0085] In one embodiment, the liquid cooling plate 401 can be detachably connected to the test chamber 100. The test chamber 100 may have a first locking position and a second locking position. When the liquid cooling plate 401 is connected to the test chamber 100 through the first locking position, the liquid cooling plate 401 is in the first mounting position; and when the liquid cooling plate 401 is connected to the test chamber 100 through the second locking position, the liquid cooling plate 401 is in the second mounting position.

[0086] In another embodiment, the liquid cooling plate 401 is movably connected inside the test chamber 100, and the liquid cooling plate 401 can be switched between the first mounting position and the second mounting position by moving or flipping.

[0087] The liquid cooling plate 401 can switch between the first mounting position and the second mounting position to meet the testing requirements of the battery cell 1000 under different usage environments, such as the testing of the battery cell 1000 in upright and inverted environments.

[0088] The battery cell 1000 includes a housing, a top cover, and an electrode assembly. The housing has a receiving cavity, the electrode assembly is disposed in the receiving cavity, and the top cover is connected to the housing and closes the receiving cavity. Figure 9 As shown, with the battery cell 1000 upright, the top cover is located on the upper side of the casing, and the liquid cooling plate 401 is located at the bottom of the battery cell 1000. The liquid cooling plate 401 abuts against the bottom of the casing of the battery cell 1000 and simultaneously supports the battery cell 1000, thus enabling testing under the upright orientation. Figure 10In the embodiment shown, the battery cell 1000 is inverted. At this time, the top cover is located on the lower side of the housing, the liquid cooling plate 401 is located on the upper part of the battery cell 1000, and the liquid cooling plate 401 abuts against the bottom of the housing of the battery cell. At this time, the top cover of the battery cell 1000 abuts against the support member 103, and the support member 103 supports the entire battery cell 1000, thereby performing the test under the inverted condition.

[0089] refer to Figure 9 , Figure 10 In some embodiments of this application, the test chamber 100 is provided with a screw 104 and a guide 105. The screw 104 is rotatably connected to the test chamber 100, and the liquid cooling plate 401 is threadedly connected to the screw 104. At the same time, the liquid cooling plate 401 is guidedly connected to the guide 105.

[0090] The screw 104 can be rotated manually or electrically driven by a motor. When the screw 104 rotates, the liquid cooling plate 401 is screwed to the screw 104, and the liquid cooling plate 401 is also guided and restricted by the guide member 105. At this time, the liquid cooling plate 401 can only move along the axial direction of the guide member 105 to move closer to or away from the carrier member 103.

[0091] It should be noted that, during arrangement, the axial direction of the screw 104 is parallel to the axial direction of the guide 105. The guide 105 can be a guide rod, or a guide rail or groove provided on the cavity wall of the test chamber 101, which will not be described in detail here.

[0092] The liquid cooling plate 401 has a screw hole or nut for screwing into the screw 104; a guide hole for guiding and engaging with the guide member 105 can be provided on the liquid cooling plate 401. The guide member 105 can also be a guide rail fixedly connected to the test chamber 100, and a guide slider for guiding and engaging with the guide rail can be provided on the liquid cooling plate 401. The screw 104 and the guide member 105 can be set on the support member 103, or they can be directly set on the bottom wall of the housing 100a of the test chamber 100. When the screw 104 rotates, the liquid cooling plate 401 can move along the guiding direction of the guide member 105 and move closer to or away from the support member 103. This facilitates the adjustment of the position of the liquid cooling plate 401, allowing the position of the liquid cooling plate 401 to be adjusted according to the test status of the battery cell 1000. On the other hand, when the cell 1000 is in an inverted test state, the position of the liquid cooling plate 401 can be adjusted by rotating the screw 104 so that the liquid cooling plate 401 is as close as possible to the surface of the cell 1000. At the same time, the liquid cooling plate 401 can be close to or away from the carrier 103 to adapt to cells 1000 of different sizes and specifications to meet the test requirements of cells 1000 of different specifications.

[0093] In some embodiments of this application, the test component 102 includes a charge / discharge test module 1021. Specifically, the charge / discharge test module 1021 may be a charge / discharge tester, which is connected to the battery cell 1000 to perform charge / discharge tests. The charge / discharge tester may be partially located within the test chamber 101. (See reference...) Figure 12 The cell testing device also includes a rack 500, on which all the test boxes 100 are mounted. The rack 500 provides a mounting base for the test boxes 100, allowing all the test boxes 100 to be integrated on the rack 500, thus facilitating the testing of batches of cell 1000.

[0094] refer to Figure 4 In some embodiments of this application, the test chamber 100 may also be equipped with a humidifying tube 107 and a humidity sensor 106. Both the humidifying tube 107 and the humidity sensor 106 are electrically connected to the controller 301. The humidity sensor 106 can monitor the humidity data inside the test chamber 100 and transmit the humidity data to the controller 301. When the humidity inside the test chamber 100 differs from the preset humidity, the controller 301 can activate the humidifying tube 107 to change the ambient humidity inside the test chamber 100.

[0095] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0096] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or at least two of the features. In the description of this utility model, unless otherwise stated, "at least two" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0097] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "left", "right", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0098] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0099] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or at least two embodiments or examples.

[0100] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A battery cell testing device, characterized in that, include: The test box (100) has a test chamber (101) for testing the power supply core (1000), and a test assembly (102) is provided inside the test box (100). The test box (100) has multiple components. Temperature control component (200) includes compressor (201), multiple first circuits and multiple first heat exchangers (202). Each first circuit corresponds to a test chamber (101). Each first circuit is connected to the compressor (201) and at least one first heat exchanger (202). The first heat exchanger (202) can cool or heat and regulate the temperature inside the test chamber (101). Each test chamber (101) is matched with at least one first heat exchanger (202). The monitoring component (300) includes a controller (301) and a first monitor (302). The controller (301) is electrically connected to the first monitor (302), the compressor (201), and the first heat exchanger (202). Each test chamber (101) is equipped with the first monitor (302), which is capable of monitoring the temperature inside the test chamber (101).

2. The cell testing device according to claim 1, characterized in that, The temperature control assembly (200) further includes a second heat exchanger (203) and a throttle (204) both electrically connected to the controller (301). One of the second heat exchanger (203) and the first heat exchanger (202) is an evaporator and the other is a condenser. Each first loop is connected to the second heat exchanger (203), and in each first loop, the second heat exchanger (203) is connected between the compressor (201) and the first heat exchanger (202). Each of the first loops is connected to the throttle (204), and in each of the first loops, the throttle (204) is connected between the second heat exchanger (203) and the first heat exchanger (202); or, there are multiple throttles (204), each of the first loops is connected to the throttle (204), and the throttle (204) is connected between the second heat exchanger (203) and the first heat exchanger (202).

3. The cell testing device according to claim 1, characterized in that, The first heat exchanger (202) is located in the corresponding test chamber (101); or, the temperature control component (200) further includes a plurality of first air ducts (206) and a plurality of first fans (205), the first air ducts (206) correspond one-to-one with the test chambers (101) and are connected, the first fans (205) are electrically connected to the controller (301), and the first fans (205) enable the cold air or hot air generated by the first heat exchanger (202) to reach the test chamber (101) through the first air ducts (206).

4. The cell testing apparatus according to any one of claims 1-3, characterized in that, The cell testing device further includes a liquid cooling assembly (400), which includes a plurality of liquid cooling plates (401). Each test chamber (101) is provided with at least one of the liquid cooling plates (401), and the liquid cooling plates (401) are used to cool the cell (1000).

5. The cell testing apparatus according to claim 4, characterized in that, The liquid cooling assembly (400) further includes a second circuit and a refrigerant tank (402). The second circuit is provided in multiple ways and corresponds one-to-one with the test chamber (101). The refrigerant tank (402) is used to store refrigerant. Each second circuit is connected to the refrigerant tank (402). The liquid cooling plate (401) is provided with a refrigerant flow channel (4011). The liquid cooling plate (401) is connected to the corresponding second circuit, and the refrigerant flow channel (4011) is in communication with the second circuit. The monitoring component (300) further includes a second monitor (303), which is provided in multiples and is electrically connected to the controller (301). Each second loop is provided with a second monitor (303), which is used to monitor the temperature of the refrigerant in the refrigerant box (402).

6. The cell testing apparatus according to claim 5, characterized in that, The temperature control assembly (200) also includes a third loop and a third heat exchanger (207). The third loop is connected to the compressor (201), and the third heat exchanger (207) is connected to the third loop and electrically connected to the controller (301). The third heat exchanger (207) is capable of exchanging heat with the refrigerant in the refrigerant box (402).

7. The cell testing apparatus according to claim 6, characterized in that, The liquid cooling assembly (400) also includes a heater (403), which is located in the refrigerant tank (402). The heater (403) is electrically connected to the controller (301) and is used to heat the refrigerant.

8. The cell testing apparatus according to claim 5, characterized in that, The test chamber (100) is equipped with a support member (103), and the liquid cooling plate (401) has a first mounting position and a second mounting position. When the liquid cooling plate (401) is in the first mounting position, the liquid cooling plate (401) can support the battery cell (1000) and cool the battery cell (1000); When the liquid cooling plate (401) is in the second mounting position, the liquid cooling plate (401) and the support member (103) are spaced apart. The side of the support member (103) facing the liquid cooling plate (401) is used to support the battery cell (1000). The liquid cooling plate (401) can abut against the battery cell (1000) and cool the battery cell (1000).

9. The cell testing apparatus according to claim 8, characterized in that, The test chamber (100) is provided with a screw (104) and a guide (105). The screw (104) is rotatably connected to the test chamber (100). The liquid cooling plate (401) is screwed to the screw (104) and is also guided to the guide (105). The screw (104) can rotate and move the liquid cooling plate (401) closer to or away from the carrier (103).

10. The cell testing apparatus according to claim 5, characterized in that, The test component (102) includes a charge-discharge test module (1021), which is used to connect the battery cell (1000) and perform charge-discharge tests; the battery cell test device also includes a rack (500), and all the test boxes (100) are located on the rack (500).

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