Lithium battery cover plate explosion-proof valve test tool

Abstract

The utility model provides a lithium battery cover plate explosion-proof valve test tool. The lithium battery cover plate explosion-proof valve test tool comprises a bottom plate and a pressing block, the bottom plate is provided with a first step surface, a second step surface and a third step surface, the center position of the second step surface is used for placing a cover plate with an anti-explosion valve, the pressing block is also arranged at the center position of the second step surface and used for pressing and positioning the cover plate, and the pressing block has different specifications to adapt to cover plates of different specifications. A horizontal clamping assembly and a vertical clamping assembly are arranged on the second step face and the third step face correspondingly and used for clamping and positioning the pressing block in the horizontal direction and the vertical direction correspondingly. According to the utility model, the stability and air tightness of the cover plate explosion-proof valve in the testing process can be ensured, and for testing the lithium battery cover plate explosion-proof valves with different specifications, the pressing blocks with different sizes can be replaced for pressing and testing, so that the compatibility is high, the operation is convenient, and the testing efficiency is improved. And the test reliability and efficiency of the lithium battery cover plate explosion-proof valve test tool are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing, and particularly relates to a testing tool for an explosion-proof valve of a lithium battery cover plate. Background Art

[0002] The explosion-proof valve of the lithium battery cover plate is a component that integrates waterproof and breathable functions with explosion-proof functions. It not only has the explosion-proof function and the function of reducing blasting damage of traditional explosion-proof valves, but also has waterproof and breathable functions. The safety of lithium batteries has attracted much attention. To ensure that lithium batteries have good pressure-bearing capacity, relevant explosion-proof tests need to be carried out before leaving the factory to ensure their safety. The traditional lithium battery explosion-proof testing tool is only applicable to a certain fixed model of lithium battery cover plate. When the model of the lithium battery cover plate is switched, the tool needs to be switched to conduct the test. The compatibility is poor, and the model change is relatively troublesome, thus reducing the test efficiency. Content of the Utility Model

[0003] The purpose of the utility model is: aiming at the deficiencies in the above background art, to provide a tool for testing the detonation pressure or cyclic breathing of the explosion-proof valve of lithium battery cover plates of various models and sizes, so as to improve the convenience and efficiency of testing.

[0004] To achieve the above purpose, the utility model provides a testing tool for an explosion-proof valve of a lithium battery cover plate, which includes a bottom plate and a pressing block;

[0005] The bottom plate is provided with a first step surface, a second step surface and a third step surface with gradually increasing heights. The center position of the second step surface is used to place the cover plate with an explosion-proof valve. The pressing block is also arranged at the center position of the second step surface and is used to press and position the cover plate. The pressing block has different specifications to adapt to different specifications of the cover plate. Horizontal clamping components and vertical clamping components are respectively arranged on the second step surface and the third step surface, and are respectively used to clamp and position the pressing block from the horizontal direction and the vertical direction;

[0006] An air cavity is arranged inside both the bottom plate and the pressing block. At the same time, the position where the second step surface of the bottom plate is located and the pressing block are both provided with air pipe joints communicated with the air cavity. The air pipe joints are used to connect the air pipes of the testing system; testing ports are arranged at the center position of the second step surface and the lower surface of the pressing block. The testing port of the pressing block, the explosion-proof valve of the cover plate and the testing port of the second step surface correspond to each other. One of the air pipe joints is set as an air inlet, and the other air pipe joint is set as an air outlet.

[0007] Further, the second step surface adopts a cross-shaped distribution, and the third step surface is located at each diagonal position and is staggered with the second step surface.

[0008] Further, an annular mounting groove is provided at the position of the test port, and a sealing ring with a matching specification is installed in the annular mounting groove.

[0009] Further, the horizontal clamping assembly includes a clamping cylinder and a clamping block connected to the end of the telescopic rod of the clamping cylinder. The clamping cylinder is arranged at the four end positions of the cross shape of the second step surface, and the clamping blocks are all located inside.

[0010] Further, the vertical clamping assembly includes various toggle clamps arranged on the third step surface, and the toggle clamps are used to apply a downward pressing force to the pressing block.

[0011] Further, the height of the first step surface is 5 - 30 mm, the second step surface is 10 - 40 mm higher than the first step surface, and the third step surface is 10 - 50 mm higher than the second step surface.

[0012] Further, threaded holes are provided at corresponding positions on the second step surface and the third step surface, and the clamping cylinder or the toggle clamp is fixed through the threaded holes and screws.

[0013] Further, the materials of the bottom plate and the pressing block are bakelite, high-hardness plastic, aluminum alloy, or 45 steel.

[0014] Further, an air pipe, a pressure gauge, and a three-way valve are connected to the outside of the air pipe joint for starting and stopping air and detecting air pressure.

[0015] Further, the material of the sealing ring is fluororubber or EPDM, and the compression amount is 20% - 60%.

[0016] The above solution of the present utility model has the following beneficial effects:

[0017] The explosion-proof valve test tooling for lithium battery covers provided by the present utility model can ensure the stability and airtightness of the cover explosion-proof valve during the test through the cooperation of the bottom plate and the pressing block, as well as the settings of the horizontal clamping assembly and the vertical clamping assembly. For the tests of explosion-proof valves of lithium battery covers with different specifications, pressing blocks of different sizes can be replaced for pressing and testing. At this time, the clamping cylinders of the horizontal clamping assembly and the toggle clamps of the vertical clamping assembly can both stably and reliably clamp and position the pressing block, with high compatibility and convenient operation. Therefore, the test reliability and efficiency of the explosion-proof valve test tooling for lithium battery covers are improved;

[0018] Other beneficial effects of the present utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 Schematic diagram of the cover plate of the present utility model installed on the second step surface;

[0021] Figure 3 Schematic diagram of the test port and the sealing ring of the present utility model.

[0022]

Description of the attached drawing reference numerals

[0023] 1 - Bottom plate; 2 - Pressure block; 3 - First step surface; 4 - Second step surface; 5 - Third step surface; 6 - Explosion-proof valve; 7 - Cover plate; 8 - Air pipe joint; 9 - Test port; 10 - Sealing ring; 11 - Clamping cylinder; 12 - Clamping block; 13 - Toggle clamp. Detailed implementation manners

[0024] To make the technical problems, technical solutions and advantages to be solved by the present utility model clearer, the following will be described in detail with reference to the attached drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. In addition, the technical features involved in the different implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a locking connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] Such as Figures 1-3As shown in the figure, an embodiment of the present utility model provides a test tool for the explosion-proof valve of a lithium battery cover plate, which includes a bottom plate 1 and a pressing block 2. Among them, the bottom plate 1 is provided with a first step surface 3, a second step surface 4, and a third step surface 5 with gradually increasing heights. The first step surface 3 is the supporting surface of the entire tool. The second step surface 4 is distributed in a cross shape, and the third step surface 5 is located at each diagonal position and is offset from the second step surface 4. The center position of the second step surface 4 is used to place the cover plate 7 with the explosion-proof valve 6, and at the same time, the pressing block 2 is also arranged at the center position of the second step surface 4 to press and position the cover plate 7, so that the cover plate 7 remains stable in position during the explosion-proof valve 6 test and no air leakage phenomenon occurs, etc. Horizontal clamping components and vertical clamping components are respectively arranged on the second step surface 4 and the third step surface 5 to clamp and position the pressing block 2 from the horizontal direction and the vertical direction respectively, further making the pressing block 2 maintain the stability of its position and airtightness during the test.

[0028] In this embodiment, air cavities (air channels) are arranged inside both the bottom plate 1 and the pressing block 2. At the same time, air pipe connectors 8 communicating with the air cavities are arranged at the position of the second step surface 4 of the bottom plate 1 and the pressing block 2. The air pipe connectors 8 are used to connect the air pipes of the test system. Among them, test ports 9 are arranged at the center position of the second step surface 4 and the lower surface of the pressing block 2. After the pressing block 2 presses the cover plate 7 tightly, the test port 9 of the pressing block 2, the explosion-proof valve 6 of the cover plate 7, and the test port 9 of the second step surface 4 are aligned to test the pressure-bearing performance, etc. of the explosion-proof valve 6. It can be understood that when the air pipe connector 8 at the position of the second step surface 4 is set as the air inlet, the air pipe connector 8 of the pressing block 2 is set as the air outlet, or vice versa, and the test is carried out by relying on the preset air pressure generated by the test system.

[0029] Specifically, when the air pipe connector 8 at the position of the second step surface 4 is set as the air inlet and the air pipe connector 8 of the pressing block 2 is set as the air outlet, it is equivalent to pressurizing the inside of the lithium battery to test the explosion-proof performance of the explosion-proof valve 6 at this time; when the air pipe connector 8 at the position of the second step surface 4 is set as the air outlet and the air pipe connector 8 of the pressing block 2 is set as the air inlet, it is equivalent to pressurizing the outside of the lithium battery to test the explosion-proof performance of the explosion-proof valve 6 at this time.

[0030] Obviously, it is necessary to ensure the sealing at the gaps between the bottom plate 1 and the cover plate 7 and between the pressing block 2 and the cover plate 7 during the test. Therefore, in this embodiment, annular installation grooves are arranged at the positions of the two test ports 9, and sealing rings 10 with matching specifications are installed in the annular installation grooves. After the pressing block 2 presses the cover plate 7 tightly, the sealing rings 10 can ensure the sealing of these two gaps, thus ensuring the reliable progress of the pressure-bearing test, etc.

[0031] In a specific embodiment of this embodiment, the horizontal clamping assembly includes a clamping cylinder 11 and a clamping block 12 connected to the end of the telescopic rod of the clamping cylinder 11. Among them, the clamping cylinders 11 are arranged at the four end positions of the cross shape of the second step surface 4, and the clamping blocks 12 are all located inside. Therefore, the pressing block 2 can be clamped and positioned in two orthogonal directions on the horizontal plane, ensuring the stable position of the pressing block 2 in the horizontal direction.

[0032] In a specific embodiment of this embodiment, the vertical clamping assembly includes various toggle clamps 13 arranged on the third step surface 5. By applying a downward pressing force to the diagonal positions of the pressing block 2 through the toggle clamps 13, the pressing block 2 is pressed tightly against the second step surface 4 in the vertical direction, ensuring the stable position and airtightness of the pressing block 2 in the vertical direction. Finally, through the combination of the horizontal clamping assembly and the vertical clamping assembly, the purpose of positioning and testing the pressing block 2 and the cover plate 7 during the test is achieved. For the tests of explosion-proof valves 6 of lithium battery cover plates 7 of different specifications, different-sized pressing blocks 2 can be replaced for pressing and testing. At this time, the clamping cylinders 11 and the toggle clamps 13 can both clamp and position the pressing block 2 stably and reliably, with high compatibility and convenient operation.

[0033] It should be noted that the toggle clamp 13 itself is a common structure in the prior art, and its specific structural form will not be elaborated here. Those skilled in the art can select appropriate specifications based on the clamping force, etc.

[0034] As a preferred embodiment, in this embodiment, the materials of the bottom plate 1 and the pressing block 2 can be various, such as bakelite, high-hardness plastic, aluminum alloy, 45 steel, etc. The height of the first step surface 3 can be 5 - 30 mm, the second step surface 4 is 10 - 40 mm higher than the first step surface 3, and the shape of the second step surface 4 can also be rectangular, etc. The third step surface 5 is 10 - 50 mm higher than the second step surface 4, and threaded holes are provided at the corresponding positions of the second step surface 4 and the third step surface 5 to fix the clamping cylinder 11, the toggle clamp 13, etc. through the threaded holes and screws.

[0035] As a preferred embodiment, in this embodiment, pneumatic components such as air pipes, pressure gauges, and three-way valves can be connected outside the air pipe joint 8 for starting and stopping air and detecting air pressure.

[0036] As a preferred embodiment, in this embodiment, the material of the sealing ring 10 can be fluororubber, EPDM, etc., and the compression amount is 20% - 60%, with characteristics such as high elasticity and corrosion resistance.

[0037] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.

[0038] The above embodiments merely illustrate several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A test tool for the explosion-proof valve of a lithium battery cover plate, characterized in that It includes a bottom plate and a pressing block; The bottom plate is provided with a first step surface, a second step surface and a third step surface with increasing heights in sequence. The center position of the second step surface is used to place a cover plate with an explosion-proof valve. The pressing block is also arranged at the center position of the second step surface and is used to press and position the cover plate. The pressing block has different specifications to adapt to different specifications of the cover plate. A horizontal clamping component and a vertical clamping component are respectively arranged on the second step surface and the third step surface, and are respectively used to clamp and position the pressing block in the horizontal direction and the vertical direction; Air cavities are arranged inside both the bottom plate and the pressing block. At the same time, the position where the second step surface of the bottom plate is located and the pressing block are both provided with air pipe joints communicated with the air cavity, and the air pipe joints are used to connect the air pipes of the test system; test ports are arranged at the center position of the second step surface and the lower surface of the pressing block. The test port of the pressing block, the explosion-proof valve of the cover plate and the test port of the second step surface correspond to each other. One of the air pipe joints is set as an air inlet, and the other air pipe joint is set as an air outlet.

2. The explosion-proof valve test tooling for a lithium battery cover plate according to claim 1, characterized in that, The second step surface is distributed in a cross shape, and the third step surface is located at each diagonal position and is staggered with the second step surface.

3. The explosion-proof valve test tooling for a lithium battery cover plate according to claim 1, wherein An annular installation groove is arranged at the position of the test port, and a sealing ring with a matching specification is installed in the annular installation groove.

4. A test tool for the explosion-proof valve of a lithium battery cover plate according to claim 2, characterized in that, The horizontal clamping component includes a clamping cylinder and a clamping block connected to the end of the telescopic rod of the clamping cylinder. The clamping cylinder is arranged at the four end positions of the cross shape of the second step surface, and the clamping blocks are all located inside.

5. A testing tool for the explosion-proof valve of a lithium battery cover plate according to claim 4, characterized in that, The vertical clamping component includes various toggle clamps arranged on the third step surface, and the toggle clamps are used to apply a downward pressing force to the pressing block.

6. The explosion-proof valve test tooling for a lithium battery cover plate according to claim 5, characterized in that The height of the first step surface is 5 - 30 mm, the second step surface is 10 - 40 mm higher than the first step surface, and the third step surface is 10 - 50 mm higher than the second step surface.

7. A test tool for the explosion-proof valve of a lithium battery cover plate according to claim 5, characterized in that, Threaded holes are arranged at the corresponding positions of the second step surface and the third step surface, and the clamping cylinder or the toggle clamp is fixed through the threaded holes and screws.

8. The explosion-proof valve test tooling for a lithium battery cover plate according to claim 1, characterized in that, The materials of the bottom plate and the pressing block are bakelite or high-hardness plastic or aluminum alloy or 45 steel.

9. The explosion-proof valve test tooling for a lithium battery cover plate according to claim 1, characterized in that, An air pipe, a pressure gauge and a three-way valve are connected to the outside of the air pipe joint, and are used to start and stop the air and detect the air pressure.

10. The explosion-proof valve test tooling for a lithium battery cover plate according to claim 3, characterized in that, The material of the sealing ring is fluororubber or EPDM, and the compression amount is 20% - 60%.

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