A clamping device for square lithium battery performance test

Abstract

The utility model relates to a kind of clamping devices for square lithium battery performance test, including frame assembly and clamping mechanism, frame assembly includes frame main body, frame main body is equipped with mounting plate, and mounting plate is set clamping mechanism and test lithium battery;The top surface of frame main body is equipped with the third cross section material of two parallel arrangements, and the third cross section material is used for integrated cable fixing block;Fixing block is used to set positive test line or negative test line;Clamping mechanism includes clamping cylinder, pneumatic joint, clamping plate and heat sink, the both ends of clamping cylinder are connected with a clamping plate respectively, and the opposite inner sides of two clamping plates are fixedly connected with heat sink respectively, and test lithium battery is set between two heat sinks.The utility model effectively eliminates the risk of dumping caused by unstable placement during lithium battery test, and the heat generated by lithium battery during test can be quickly discharged through the heat sink, improving the heat dissipation efficiency, and improving the safety and reliability of the entire test process.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery testing technology, and in particular to a clamping device for performance testing of square lithium batteries. Background Technology

[0002] In the lithium battery production process, electrical performance testing is required. Typically, lithium batteries are placed on shelves and directly connected to test leads for various electrical performance tests. However, this process often results in the test leads becoming tangled, and the direct placement of the batteries on the shelves poses a risk of instability and tipping, potentially causing external short circuits, unusable test data, or even fire and explosion. Therefore, how to safely and stably perform electrical performance testing on prismatic lithium batteries is a pressing issue. Current clamping methods have several drawbacks:

[0003] (1) Unreliable fixing: Shelf-style placement poses a greater risk of batteries tipping over;

[0004] (2) Disorganized cable management: Intertwined test leads can easily cause short circuits;

[0005] (3) Insufficient heat dissipation: The surface temperature of the battery rises by 20°C under natural cooling, which affects the accuracy of the test.

[0006] The aforementioned problems result in test data deviations exceeding ±5% and pose safety hazards. Therefore, this invention proposes a clamping device for performance testing of square lithium batteries to solve these problems. Utility Model Content

[0007] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a clamping device for performance testing of square lithium batteries, which has pneumatic clamping, active heat dissipation and cable integrated management functions, and is suitable for high-precision and high-safety battery electrical performance testing scenarios.

[0008] The purpose of this utility model is achieved as follows:

[0009] A clamping device for performance testing of square lithium batteries includes a frame assembly and a clamping mechanism. The frame assembly includes a frame body, which is a cuboid frame structure. A first horizontal profile is symmetrically arranged in the middle of the left and right sides of the frame body. The two first horizontal profiles are directly fixedly connected to a mounting plate. The mounting plate is provided with a clamping mechanism and a test lithium battery.

[0010] The top surface of the frame body is provided with two parallel third horizontal profiles, which are used to integrate cable fixing blocks; the center of the fixing block is provided with a through hole for fitting a positive or negative test wire.

[0011] The clamping mechanism includes a clamping cylinder, a pneumatic connector, clamping plates, and a heat sink. A pneumatic connector is fixedly connected to the clamping cylinder, which is used to connect to an air source to drive the clamping cylinder to run. A clamping plate is connected to each end of the clamping cylinder, and a heat sink is fixedly connected to the inner side of the two clamping plates. A test lithium battery is placed between the two heat sinks.

[0012] The positive terminal of the test lithium battery is connected to one end of the positive test line, and the negative terminal of the test lithium battery is connected to one end of the negative test line. The other ends of the positive and negative test lines are connected to the test equipment.

[0013] Preferably, the third horizontal profile and the corresponding inner side of the top horizontal bar of the frame body are provided with two rows of symmetrically arranged fixing blocks. The positions of the fixing blocks on the third horizontal profile and the frame body are corresponding. The two fixing blocks on the third horizontal profile and the frame body are a group: one is sleeved on the positive test line and the other is sleeved on the negative test line.

[0014] Preferably, each end of the fixing block is provided with a fixing hole, and the fixing block is fixed to the third horizontal profile or the main body of the frame using bolts through the fixing holes.

[0015] Preferably, the clamping cylinder has dual output ports at both ends, with each output port connected to a clamping plate.

[0016] Preferably, the heat sink is provided with heat dissipation fins, and the side of the heat sink with heat dissipation fins is embedded in the inner side of the clamping plate.

[0017] Preferably, a second horizontal profile is provided above the first horizontal profile. The second horizontal profile is used to fix the pneumatic switch control valve, which is used to control the operation of the clamping cylinder.

[0018] Preferably, each pneumatic switch control valve controls eight clamping cylinders.

[0019] Preferably, a wheel is provided at each of the four bottom corners of the frame body for moving the frame assembly.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention provides a clamping device for performance testing of square lithium batteries. The clamping mechanism is installed on a vehicle frame, and the test cables are arranged in an orderly manner through fixing blocks, completely solving the problem of tangled and messy cables in traditional testing. The clamping mechanism also ensures the stable fixation of the lithium battery during testing, effectively eliminating the risk of tipping over due to unstable placement. Furthermore, the heat dissipation plate can quickly dissipate the heat generated by the lithium battery during testing, keeping the battery operating temperature stable within a safe range. Compared with traditional testing methods, the heat dissipation efficiency is significantly improved, enhancing the safety and reliability of the entire testing process. It has the following advantages:

[0022] (1) Fixed reliability: Pneumatic clamping greatly reduces battery displacement;

[0023] (2) High heat dissipation efficiency: The heat dissipation plate slows down the temperature rise of the battery surface and reduces the battery surface temperature;

[0024] (3) Zero failure rate: The trench wiring completely eliminates the risk of cable short circuits;

[0025] (4) High operating efficiency: A single cylinder controls 8 workstations, greatly shortening the changeover time. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 for Figure 1 A magnified view of part A in the diagram.

[0028] Figure 3 This is a front view of the present invention.

[0029] Figure 4 This is a top view of the present invention.

[0030] Figure 5 This is a schematic diagram of the clamping mechanism of this utility model.

[0031] In the picture:

[0032] 1. Frame assembly; 11. Frame body; 12. Wheel; 13. First horizontal profile; 14. Mounting plate; 15. Second horizontal profile; 16. Pneumatic switch control valve; 17. Third horizontal profile; 18. Fixing block; 19. Fixing hole; 110. Positive test line; 111. Negative test line; 2. Clamping mechanism; 21. Clamping cylinder; 22. Pneumatic connector; 23. Clamping plate; 24. Heat sink; 25. Test lithium battery. Detailed Implementation

[0033] To better understand the technical solution of this utility model, a detailed description will be provided below in conjunction with relevant illustrations. It should be understood that the specific embodiments described below are not intended to limit the specific implementation of the technical solution of this utility model, but are merely possible implementations of the technical solution of this utility model. It should be noted that the descriptions of the positional relationships of the components herein, such as component A being located above component B, are based on the relative positions of the components in the illustrations and are not intended to limit the actual positional relationships of the components. Example 1

[0034] See Figures 1-5 , Figure 1 A schematic diagram of a clamping device for testing the performance of square lithium batteries is shown. As shown in the figure, the clamping device for testing the performance of square lithium batteries in this embodiment 1 includes a frame assembly 1 and a clamping mechanism 2. The frame assembly 1 includes a frame body 11, which is a cuboid frame structure. A wheel 12 is provided at each of the four corners of the bottom of the frame body 11 for moving the frame assembly 1. A first horizontal profile 13 is symmetrically provided in the middle of the left and right sides of the frame body 11. A mounting plate 14 is directly fixedly connected to the two first horizontal profiles 13. The clamping mechanism 2 and the test lithium battery 25 are provided on the mounting plate 14.

[0035] The top surface of the frame body 11 is provided with two parallel third horizontal profiles 17, which are used to integrate cable fixing blocks 18. The third horizontal profile 17 and the corresponding top horizontal bar of the frame body 11 are provided with two rows of symmetrically arranged fixing blocks 18. The third horizontal profile 17 and the fixing blocks 18 on the frame body 11 are positioned correspondingly. The third horizontal profile 17 and the two corresponding fixing blocks 18 on the frame body 11 form a group: one is sleeved on the positive test line 110 and the other is sleeved on the negative test line 111.

[0036] The fixing block 18 has a through hole in the center for mounting the positive test line 110 or the negative test line 111; the fixing block 18 has a fixing hole 19 at each end, and the fixing block 18 is fixed to the third horizontal profile 17 or the frame body 11 by bolts through the fixing holes 19.

[0037] The clamping mechanism 2 includes a clamping cylinder 21, a pneumatic connector 22, a clamping plate 23, and a heat sink 24. The clamping cylinder 21 is fixedly connected to the pneumatic connector 22, which is used to connect to an air source to drive the clamping cylinder 21 to run.

[0038] The clamping cylinder 21 has dual output ports at both ends. Each output port is connected to a clamping plate 23. The inner sides of the two clamping plates 23 are respectively fixedly connected to heat sinks 24. The heat sinks 24 are provided with heat sink fins. The side of the heat sink 24 with heat sink fins is embedded in the inner side of the clamping plate 23. A test lithium battery 25 is placed between the two heat sinks 24.

[0039] The positive terminal of the test lithium battery 25 is connected to one end of the positive test line 110, and the negative terminal of the test lithium battery 25 is connected to one end of the negative test line 111. The other ends of the positive test line 110 and the negative test line 111 are connected to the test equipment.

[0040] A second horizontal profile 15 is provided above the first horizontal profile 13. The second horizontal profile 15 is used to fix the pneumatic switch control valve 16. The pneumatic switch control valve 16 is used to control the operation of the clamping cylinder 21. Each pneumatic switch control valve 16 controls eight clamping cylinders 21.

[0041] The wheel 12 is a universal wheel with brakes and a load capacity of ≥200kg.

[0042] Working principle:

[0043] This utility model provides a clamping device for performance testing of square lithium batteries. In use, the frame assembly 1 is first moved to a suitable position by the wheels 12, and then the test lithium battery 25 is clamped and fixed by the clamping mechanism 2. The clamping mechanism 2 is installed on the mounting plate 14 on the first horizontal profile 13. Specifically, the pneumatic connector 22 is connected to the air source to drive the clamping cylinder 21 to run, which drives the clamping plate 23 and the heat sink 24 to clamp the test lithium battery 25. The fixing block 18 is fixed to the third horizontal profile 17 on the frame body 11 with bolts through the fixing holes 19. The positive test line 110 and the negative test line 111 are fixed to the fixing block 18. One end of the positive test line 110 and the negative test line 111 are connected to the test equipment, and the other end is connected to the positive terminal and the negative terminal of the test lithium battery 25, respectively. After the preparation work is completed, the test begins. The pneumatic switch control valve 16 on the second horizontal profile 15 is used to control the operation of the clamping cylinder 21. Each pneumatic switch control valve 16 controls eight clamping cylinders 21.

[0044] This utility model discloses a clamping device for performance testing of square lithium batteries. The testing process is as follows:

[0045] (1) Battery loading:

[0046] Apply the wheel brakes and place the test lithium battery between the two heat sinks.

[0047] Turn on the pneumatic switch to drive the clamping cylinder to push the clamping plate to clamp the battery.

[0048] (2) Cable connection:

[0049] Positive / negative test leads are led out through slots in the fixing block and connected to the battery electrodes;

[0050] The cable length allowance is coiled around the back of the third horizontal profile cable tray.

[0051] (3) Heat dissipation monitoring:

[0052] During the test, the battery heat was conducted through the heat sink to the heat sink fins for convection and dissipation;

[0053] Infrared thermometers monitor the surface temperature of the battery in real time.

[0054] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.

Claims

1. A clamping device for performance testing of square lithium batteries, characterized in that: It includes a frame assembly (1) and a clamping mechanism (2). The frame assembly (1) includes a frame body (11). The frame body (11) is a cuboid frame structure. A first horizontal profile (13) is symmetrically provided in the middle of the left and right sides of the frame body (11). A mounting plate (14) is directly fixedly connected to the two first horizontal profiles (13). The clamping mechanism (2) and a test lithium battery (25) are provided on the mounting plate (14). The top surface of the frame body (11) is provided with two parallel third horizontal profiles (17), which are used to integrate cable fixing blocks (18); the center of the fixing block (18) is provided with a through hole for fitting a positive test wire (110) or a negative test wire (111). The clamping mechanism (2) includes a clamping cylinder (21), a pneumatic connector (22), a clamping plate (23), and a heat sink (24). The clamping cylinder (21) is fixedly connected to the pneumatic connector (22), which is used to connect to an air source to drive the clamping cylinder (21) to run. A clamping plate (23) is connected to each end of the clamping cylinder (21). A heat sink (24) is fixedly connected to the inner side of the two clamping plates (23) respectively. A test lithium battery (25) is placed between the two heat sinks (24). The positive terminal of the test lithium battery (25) is connected to one end of the positive test line (110), and the negative terminal of the test lithium battery (25) is connected to one end of the negative test line (111). The other ends of the positive test line (110) and the negative test line (111) are connected to the test equipment.

2. The clamping device for performance testing of square lithium batteries according to claim 1, characterized in that: The third horizontal profile (17) and the top horizontal bar of the opposite frame body (11) are provided with two rows of symmetrically arranged fixing blocks (18). The third horizontal profile (17) and the fixing blocks (18) on the frame body (11) are in the same position. The two fixing blocks (18) on the third horizontal profile (17) and the frame body (11) are a group: one is sleeved on the positive test line (110) and the other is sleeved on the negative test line (111).

3. The clamping device for performance testing of square lithium batteries according to claim 1, characterized in that: The fixing block (18) has a fixing hole (19) at each end. The fixing block (18) is fixed to the third horizontal profile (17) or the frame body (11) by bolts through the fixing holes (19).

4. The clamping device for performance testing of square lithium batteries according to claim 1, characterized in that: The clamping cylinder (21) has dual output ports at both ends, and each output port is connected to a clamping plate (23).

5. A clamping device for performance testing of square lithium batteries according to claim 1, characterized in that: The heat sink (24) is provided with heat dissipation fins, and the side of the heat sink (24) with heat dissipation fins is embedded in the inner side of the clamp (23).

6. The clamping device for performance testing of square lithium batteries according to claim 1, characterized in that: A second horizontal profile (15) is provided above the first horizontal profile (13). The second horizontal profile (15) is used to fix the pneumatic switch control valve (16), which is used to control the operation of the clamping cylinder (21).

7. A clamping device for performance testing of square lithium batteries according to claim 6, characterized in that: Each pneumatic switch control valve (16) controls eight clamping cylinders (21).

8. A clamping device for performance testing of square lithium batteries according to claim 1, characterized in that: The frame body (11) has a wheel (12) at each of the four bottom corners for moving the frame assembly (1).

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