Liquid cooling clamp

Abstract

The utility model discloses a liquid cooling clamp, and relates to the technical field of battery cell testing. The liquid cooling clamp comprises two clamping plates, a connecting assembly and a fixing assembly, the two clamping plates are arranged in a spaced mode to clamp a battery cell, each clamping plate is provided with a liquid cooling channel, and the two ends of each liquid cooling channel form openings in the surfaces of the clamping plates; the connecting assembly is communicated with the liquid cooling channels of the two clamping plates; the fixing assembly is configured to fix the two clamping plates. The liquid cooling clamp can effectively control the temperature of the battery cell, more accurate and credible data can be obtained, and the risk of high-temperature thermal runaway of the battery cell is reduced to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core testing, in particular to a liquid cooling fixture. Background Art

[0002] With the rapid development of the new energy vehicle industry, power cells as the power source of new energy vehicles have also received widespread attention. The driving quality of new energy vehicles is determined by the electrical performance of the power cells, and the electrical performance needs to be characterized by electrical performance testing. Therefore, it is very important to conduct electrical performance testing reasonably, accurately and safely.

[0003] However, when conducting high-current, high-power charge and discharge tests, the battery cells will generate a lot of heat. In actual use scenarios, the battery pack will use its own cooling device to cool the system, but the conventional fixture does not have a cooling function during the test, so the test data obtained is very different from the actual use. When the temperature exceeds the battery cell's operating temperature range, the safety of the battery cell is affected, and in severe cases, it will cause high-temperature thermal runaway, causing damage to testers and test equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a liquid cooling fixture, which can effectively control the temperature of the battery cell, obtain more accurate and reliable data, and also greatly reduce the risk of high-temperature thermal runaway of the battery cell.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A liquid cooling fixture, comprising:

[0007] Two clamping plates, the two clamping plates are spaced apart to clamp the battery core, each clamping plate is provided with a liquid cooling channel, and both ends of the liquid cooling channel form openings on the surface of the clamping plate;

[0008] A connecting component, wherein the connecting component connects the liquid cooling channels of the two clamping plates;

[0009] A fixing assembly is configured to fix the two clamping plates.

[0010] As an optional solution of the above-mentioned liquid cooling fixture, the liquid cooling channel includes a plurality of first channels and a plurality of second channels, the first channels are arranged at an angle with the second channels, and the plurality of first channels and the plurality of second channels are alternately connected in sequence.

[0011] As an optional solution of the above-mentioned liquid cooling fixture, the liquid cooling channel is close to a side of the clamping plate abutting against the battery core in the thickness direction of the clamping plate.

[0012] As an optional solution of the above-mentioned liquid cooling clamp, two clamping components are provided on at least one of the clamping plates, and the two clamping components are spaced apart on the side of the clamping plate abutting the battery cell, and the two clamping components are configured to abut the side of the battery cell to clamp the battery cell.

[0013] As an optional solution for the above-mentioned liquid cooling clamp, the clamping assembly includes a fixed plate, a clamping plate and a first elastic member, the fixed plate is fixedly connected to the clamping plate, the clamping plate is slidably connected to the fixed plate, and the two ends of the first elastic member respectively abut the fixed plate and the clamping plate.

[0014] As an optional solution of the above-mentioned liquid cooling clamp, the clamping assembly also includes a guide rod, the guide rod is fixedly connected to the clamping plate, the guide rod passes through the fixed plate and is slidably connected to the fixed plate.

[0015] As an optional solution of the above-mentioned liquid cooling clamp, a limiting protrusion is provided on at least one of the clamping plates, the limiting protrusion is protruding from the side of the clamping plate abutting against the battery cell, and the limiting protrusion is used to abut against the bottom surface of the battery cell.

[0016] As an optional solution for the above-mentioned liquid cooling clamp, the connecting assembly includes a liquid inlet pipe, a liquid outlet pipe and a connecting pipe, the liquid inlet pipe is connected to one of the openings of one of the splints, the liquid outlet pipe is connected to one of the openings of another of the splints, and the connecting pipe is used to connect the openings of the two splints that are not connected to the liquid inlet pipe or the liquid outlet pipe.

[0017] As an optional solution of the above-mentioned liquid cooling clamp, the liquid cooling clamp further includes a second elastic member, which is arranged between the two clamping plates and elastically abuts against the two clamping plates.

[0018] As an optional solution of the above-mentioned liquid cooling fixture, the thickness of the second elastic member is greater than the thickness of the battery core.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a liquid cooling fixture. In the liquid cooling fixture, two clamping plates can be fixed by a fixing assembly after clamping the battery cell, thereby applying a certain mechanical pressure to the battery cell, simulating the actual existence state of the battery cell in the battery cell package, and at the same time, the liquid cooling channels in the two clamping plates are connected through a connecting assembly. When the battery cell is subjected to a high-rate and high-power electrical performance test, the coolant flowing through the liquid cooling channel can effectively control the battery cell temperature, reduce the difference between the test environment and the actual working conditions, and obtain more accurate and reliable data. At the same time, the liquid cooling fixture can effectively control the battery cell to work within the operating temperature range, greatly reducing the risk of high-temperature thermal runaway of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the liquid cooling fixture provided by the utility model;

[0022] Figure 2 It is a structural schematic diagram of the liquid cooling fixture provided by the utility model without a clamping plate;

[0023] Figure 3 It is a cross-sectional view of the splint provided by the utility model.

[0024] In the figure:

[0025] 100. Battery cell;

[0026] 1. Clamp; 2. Connecting assembly; 3. Fixing assembly; 4. Clamping assembly;

[0027] 11. Liquid cooling channel; 12. Position limiting protrusion; 13. Opening; 21. Connecting pipe; 22. Liquid inlet pipe; 23. Liquid outlet pipe; 41. Fixing plate; 42. Clamping plate; 43. First elastic member; 44. Guide rod;

[0028] 111, first channel; 112, second channel. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0031] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0034] With the rapid development of the new energy vehicle industry, power cells as the power source of new energy vehicles have also received widespread attention. The driving quality of new energy vehicles is determined by the electrical performance of the power cells, and the electrical performance needs to be characterized by electrical performance testing. Therefore, it is very important to conduct electrical performance testing reasonably, accurately and safely.

[0035] This embodiment provides a liquid cooling fixture, such as Figure 1 As shown, the liquid cooling fixture includes two clamping plates 1 and a fixing assembly 3. The two clamping plates 1 are spaced apart to clamp the battery cell 100. The fixing assembly 3 is configured to fix the two clamping plates 1, thereby applying a certain mechanical pressure to the battery cell 100, simulating the actual existence state of the battery cell 100 in the battery cell package 100, so that the data obtained from the test is closer to the actual situation, and the two clamping plates 1 can also prevent the battery cell 100 from bulging, reducing the risk.

[0036] However, when the battery cell 100 is subjected to high current and high power charge and discharge tests, the battery cell 100 will generate a lot of heat. In actual use scenarios, the battery cell 100 will be cooled by the cooling device attached to it, but the conventional fixture does not have a cooling function during the test, so the test data obtained is very different from the actual use. When the temperature exceeds the operating temperature range of the battery cell 100, the safety of the battery cell 100 is affected, and in severe cases, high temperature thermal runaway may occur, causing damage to the test personnel and test equipment.

[0037] To solve the above problems, Figure 1 to Figure 3 As shown, the liquid cooling clamp provided in this embodiment also includes a connecting component 2. Each clamp 1 of the liquid cooling clamp is provided with a liquid cooling channel 11. Both ends of the liquid cooling channel 11 form openings 13 on the surface of the clamp 1. The connecting component 2 connects the liquid cooling channels 11 of the two clamps 1.

[0038] When the battery cell 100 is subjected to a high-rate, high-power electrical performance test, the coolant can flow through the liquid cooling channel 11, thereby effectively controlling the temperature of the battery cell 100, reducing the difference between the test environment and the actual working conditions, and obtaining more accurate and reliable data. At the same time, the liquid cooling fixture can effectively control the battery cell 100 to work within the operating temperature range, greatly reducing the risk of high-temperature thermal runaway of the battery cell 100.

[0039] The connecting assembly 2 is also connected to a circulation pump, which can drive the coolant to circulate through the liquid cooling channel 11, thereby achieving a continuous cooling effect. Since the liquid cooling channels 11 of the two clamping plates 1 are connected by the connecting assembly 2, the liquid cooling fixture only needs to be connected to one circulation pump, which simplifies the structure and reduces the cost.

[0040] like Figure 3 As shown, the liquid cooling channel 11 includes a plurality of first channels 111 and a plurality of second channels 112, the first channels 111 and the second channels 112 are arranged at an angle, and the plurality of first channels 111 and the plurality of second channels 112 are alternately connected in sequence. The liquid cooling channel 11 is formed into an "S" shape by the plurality of first channels 111 and the plurality of second channels 112 that are alternately connected, which can extend the total length of the liquid cooling channel 11 inside the clamping plate 1, thereby increasing the heat exchange area between the coolant and the clamping plate 1, and improving the heat exchange efficiency.

[0041] Specifically, the first channel 111 and the second channel 112 are perpendicular to each other, so as to avoid a significant reduction in the flow rate of the coolant due to an acute angle between the first channel 111 and the second channel 112 .

[0042] Furthermore, the liquid cooling channel 11 is close to the side of the clamping plate 1 abutting against the battery cell 100 in the thickness direction of the clamping plate 1. The liquid cooling channel 11 is closer to the battery cell 100, which can further improve the heat exchange efficiency and ensure that the temperature of the battery cell 100 can be quickly adjusted during the test.

[0043] like Figure 1 and Figure 2As shown, the connection assembly 2 includes a liquid inlet pipe 22, a liquid outlet pipe 23 and a connection pipe 21. The liquid inlet pipe 22 is connected to an opening 13 of one clamping plate 1, the liquid outlet pipe 23 is connected to an opening 13 of another clamping plate 1, and the connection pipe 21 is used to connect the openings 13 of the two clamping plates 1 that are not connected to the liquid inlet pipe 22 or the liquid outlet pipe 23. The connection pipe 21 connects the cooling channels of the two clamping plates 1 in series, and the coolant can enter the cooling channel of one clamping plate 1 through the liquid inlet pipe 22, and enter the cooling channel of the other clamping plate 1 through the connection pipe 21, and finally flow out through the liquid outlet pipe 23 to take away the heat generated by the battery cell 100, so as to ensure that the temperature of the battery cell 100 is within a safe range.

[0044] To simplify the structure, openings 13 are formed at both ends of the liquid cooling channel 11 on the same side of the clamp plate 1, and the openings 13 of the two clamp plates 1 are oriented in the same direction, thereby reducing the length of the connecting pipe 21. At the same time, a circulating pump can be connected to the liquid inlet pipe 22 and the liquid outlet pipe 23 at the same end of the two clamp plates 1.

[0045] like Figure 2 As shown, at least one clamping plate 1 is provided with two clamping assemblies 4, and the two clamping assemblies 4 are spaced apart and arranged on one side of the clamping plate 1 abutting against the battery cell 100, and the two clamping assemblies 4 are configured to abut against the side of the battery cell 100 to clamp the battery cell 100. The two clamping assemblies 4 can clamp the battery cell 100 to ensure the stability of the battery cell 100, and prevent the battery cell 100 from sliding between the two clamping plates 1 to affect the reliability of the detection data.

[0046] It is understandable that both clamping plates 1 of the liquid cooling fixture can be provided with clamping components 4, but the clamping components 4 of the two clamping plates 1 need to be avoided to avoid mutual interference and affect the clamping effect. For example, the clamping components 4 of the two clamping plates 1 are smaller in the thickness direction of the battery cell 100, and the clamping components 4 of each clamping plate 1 only clamp less than half of the thickness of the battery cell 100, or the clamping components 4 of the two clamping plates 1 are staggered in the height direction of the battery cell 100.

[0047] In this embodiment, the clamping assembly 4 includes a fixing plate 41, a clamping plate 42 and a first elastic member 43. The fixing plate 41 is fixedly connected to the clamping plate 1, the clamping plate 42 is slidably connected to the fixing plate 41, and the two ends of the first elastic member 43 abut against the fixing plate 41 and the clamping plate 42 respectively. The first elastic member 43 can drive the clamping plate 42 to abut against the side wall of the battery cell 100 to clamp the battery cell 100. Compared with using a linear drive structure to drive the clamping plate 42 to move, the first elastic member 43 can make the clamping force change smoothly under the premise of ensuring the stability of the battery cell 100, thereby avoiding damaging the battery cell 100.

[0048] Furthermore, the clamping assembly 4 further includes a guide rod 44, which is fixedly connected to the clamping plate 42, and the guide rod 44 is passed through the fixing plate 41 and is slidably connected to the fixing plate 41. The guide rod 44 can ensure the stability of the clamping plate 42 during movement and avoid deviation, thereby improving the stability of the battery cell 100.

[0049] In this embodiment, the first elastic member 43 is a spring, which is sleeved on the guide rod 44 and located between the fixing plate 41 and the clamping plate 42. At this time, the guide rod 44 can also provide guidance for the spring to prevent the spring from being compressed and bent.

[0050] It is understandable that the two clamping assemblies 4 on the clamping plate 1 clamp the battery cell 100 on both sides of the battery cell 100. However, if the battery cell 100 is small in size and the first elastic member 43 is compressed to a small extent, the clamping force of the two clamping assemblies 4 on the battery cell 100 will be weak. In order to prevent the battery cell 100 from sliding between the two clamping assemblies 4 and ensure the stability of the battery cell 100, at least one clamping plate 1 is provided with a limiting protrusion 12, which is convexly arranged on the side of the clamping plate 1 abutting against the battery cell 100, and the limiting protrusion 12 is used to abut against the bottom surface of the battery cell 100. The limiting protrusion 12 can support the battery cell 100, and can further improve the stability of the battery cell 100 during the test process in cooperation with the clamping assemblies 4 on both sides of the battery cell 100.

[0051] In this embodiment, the fixing assembly 3 includes a plurality of bolts, and the plurality of bolts pass through the two clamping plates 1 to fix the two clamping plates 1 .

[0052] It is understandable that the two clamping plates 1 are fixed with bolts to clamp the battery cell 100. As the bolts are tightened, when the clamping plates 1 generate a clamping force on the battery cell 100, the clamping force will suddenly increase, which can easily damage the battery cell 100. To avoid the above situation, the liquid cooling fixture also includes a second elastic member, which is arranged between the two clamping plates 1 and elastically abuts against the two clamping plates 1. The second elastic member can generate a reverse elastic force on the two clamping plates 1, so that the two clamping plates 1 can slowly approach each other to avoid damaging the battery cell 100.

[0053] Furthermore, the thickness of the second elastic member is greater than the thickness of the battery cell 100. As the two clamping plates 1 compress the second elastic member and the two clamping plates 1 abut against the battery cell 100, the clamping force of the two clamping plates 1 on the battery cell 100 gradually increases, which can effectively prevent the battery cell 100 from being damaged.

[0054] Specifically, the second elastic member may be a spring, or an elastic object such as polyurethane or a rubber block.

[0055] It is understandable that in order to avoid damaging the battery cell 100, a third elastic member can be further provided between the bolt and at least one clamping plate 1. When the two clamping plates 1 abut against the battery cell 100, the bolt can continue to be tightened. During this process, the clamping force of the clamping plate 1 on the battery cell 100 gradually increases, thereby ensuring the safety of the battery cell 100.

[0056] Since the temperature of the battery cell 100 is relatively high when the battery cell 100 is subjected to a high current and high power charge and discharge test, in order to accurately measure the actual temperature of the battery cell 100, a plurality of temperature measuring grooves are provided on the side of the clamping plate 1 facing the battery cell 100, and a temperature measuring piece is provided in each temperature measuring groove. When the two clamping plates 1 clamp the battery cell 100, the temperature measuring piece is in contact with the battery cell 100. The temperature of the battery cell 100 can be accurately known through a plurality of temperature measuring pieces, so that the power of the circulating pump can be adjusted as needed to control the flow rate of the coolant, so as to control the temperature of the battery cell 100 within the required range. At the same time, the temperature measuring piece can also associate the data obtained from the test with the temperature of the battery cell 100, which is conducive to comparative analysis with actual working conditions.

[0057] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A liquid cooling fixture, characterized in that: include: Two clamping plates (1), the two clamping plates (1) being arranged at intervals to clamp the battery core (100), each of the clamping plates (1) being provided with a liquid cooling channel (11), and both ends of the liquid cooling channel (11) forming openings (13) on the surface of the clamping plate (1); A connecting component (2), wherein the connecting component (2) is connected to the liquid cooling channels (11) of the two clamping plates (1); A fixing assembly (3), wherein the fixing assembly (3) is configured to fix the two clamping plates (1).

2. The liquid cooling fixture according to claim 1, characterized in that: The liquid cooling channel (11) comprises a plurality of first channels (111) and a plurality of second channels (112); the first channels (111) and the second channels (112) are arranged at an angle, and the plurality of first channels (111) and the plurality of second channels (112) are alternately connected in sequence.

3. The liquid cooling fixture according to claim 1, characterized in that: The liquid cooling channel (11) is close to a side of the clamping plate (1) abutting against the battery core (100) in the thickness direction of the clamping plate (1).

4. The liquid cooling fixture according to claim 1, characterized in that: At least one of the clamping plates (1) is provided with two clamping assemblies (4), the two clamping assemblies (4) being arranged at intervals on a side of the clamping plate (1) abutting against the battery cell (100), and the two clamping assemblies (4) being configured to abut against the side surface of the battery cell (100) so as to clamp the battery cell (100).

5. The liquid cooling fixture according to claim 4, characterized in that: The clamping assembly (4) comprises a fixing plate (41), a clamping plate (42) and a first elastic member (43); the fixing plate (41) is fixedly connected to the clamping plate (1); the clamping plate (42) is slidably connected to the fixing plate (41); and two ends of the first elastic member (43) respectively abut against the fixing plate (41) and the clamping plate (42).

6. The liquid cooling fixture according to claim 5, characterized in that: The clamping assembly (4) further comprises a guide rod (44), wherein the guide rod (44) is fixedly connected to the clamping plate (42), and the guide rod (44) is passed through the fixing plate (41) and is slidably connected to the fixing plate (41).

7. The liquid cooling fixture according to claim 4, characterized in that: At least one of the clamping plates (1) is provided with a limiting protrusion (12), the limiting protrusion (12) being protruding from a side of the clamping plate (1) abutting against the battery cell (100), and the limiting protrusion (12) being used to abut against the bottom surface of the battery cell (100).

8. The liquid cooling fixture according to any one of claims 1 to 7, characterized in that: The connecting assembly (2) comprises a liquid inlet pipe (22), a liquid outlet pipe (23) and a connecting pipe (21); the liquid inlet pipe (22) is connected to one opening (13) of one of the splints (1); the liquid outlet pipe (23) is connected to one opening (13) of another of the splints (1); and the connecting pipe (21) is used to connect the openings (13) of the two splints (1) that are not connected to the liquid inlet pipe (22) or the liquid outlet pipe (23).

9. The liquid cooling fixture according to any one of claims 1 to 7, characterized in that: The liquid cooling fixture further comprises a second elastic member, which is arranged between the two clamping plates (1) and elastically abuts against the two clamping plates (1).

10. The liquid cooling fixture according to claim 9, characterized in that: The thickness of the second elastic member is greater than the thickness of the battery core (100).

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