A multi-station extrusion test tool

Abstract

The utility model provides a multi-station extrusion test tool, the test tool includes a lifting platform, a pad, a positioning pin, a plurality of pads, and a backing plate; the lifting platform is provided with a pad, the pad is fixedly connected to the plurality of pads, a positioning pin is provided between the pad and the plurality of pads, and the pad and the plurality of pads are close to the backing plate. The multi-station extrusion test tool of the present application fixes the pad and the pad with screws and positioning pins, and places the battery on the pad and the plurality of pads, which can meet the requirements of multiple battery extrusion tests. Compared with the prior art that can only perform one extrusion test on one battery at a time, the efficiency of lithium battery extrusion test is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing equipment, in particular to a multi-station extrusion testing tool. Background Art

[0002] At present, the safety risks of lithium batteries have attracted the attention of the industry. When lithium batteries are abused electrically, mechanically or thermally, internal or external short circuits will occur, causing the lithium batteries to generate heat. When the reaction is intense to a certain extent, the heat cannot be controlled, resulting in thermal runaway, which eventually leads to lithium batteries emitting smoke, catching fire, and even exploding, seriously endangering people's lives and property. In order to simulate and avoid lithium batteries catching fire and exploding when they are subjected to mechanical abuse, various industries such as power batteries and energy storage at home and abroad have formulated corresponding standards for mechanical abuse, such as the extrusion test in GB / T 31485, GB 38031, GB / T 36276, UL1642, IEC62660, etc. In order to install and fix batteries of different shapes, various extrusion test fixtures are designed to meet the requirements of battery assembly.

[0003] In order to ensure the consistency and accuracy of the test results, the test often requires the selection of 3 to 10 identical batteries. Each battery needs to be installed before testing, and then thermally balanced. The extrusion action can only be started when the temperature fluctuation is within ±2°C. After the test, it is necessary to ensure that the battery reaches a safe state, such as meeting the observation time requirements or the battery's temperature and voltage no longer change, and then the battery can be disassembled. The thermal balance before each test and the time to ensure a safe state after the test are relatively long, resulting in a longer test cycle for each battery, causing a shortage of test resources and making it difficult to guarantee project progress.

[0004] The existing extrusion tooling design only considers the installation of square lithium batteries of different sizes, such as the one named "An extrusion test fixture based on variable-size square shell lithium batteries" (application number: 201821704518.3). The battery base is fixed with an XY limit block that limits the displacement of the battery in the length and width directions by a bolt-free fixing structure, and the battery base is fixed with a Z limit block that limits the displacement of the battery in the thickness direction by a push rod-free fixing structure. The battery also has an extrusion head that is controlled by a tensile machine to apply extrusion force to the battery. This extrusion test fixture can tighten and fix square shell lithium-ion batteries of all sizes within a certain length, width and height range.

[0005] Existing extrusion tooling only considers the extrusion of square lithium batteries in different directions. For example, the tool named "A universal extrusion tool for square batteries in multiple directions and sizes" (application number: 202220580651.2) can clamp batteries of different widths, thicknesses and lengths by adjusting the distance between the two movable rods, thereby realizing extrusion tests in the three directions of X, Y and Z.

[0006] In summary, the existing extrusion tooling only solves the problem of different battery assemblies and battery extrusion in different directions, but does not consider the long waiting time and low efficiency of battery test preparation and battery disassembly. Utility Model Content

[0007] The technical problem to be solved by the utility model is how to improve the efficiency of lithium battery extrusion testing.

[0008] The utility model solves the above technical problems through the following technical means:

[0009] The utility model provides a multi-station extrusion test tool, which comprises a lifting platform, a cushion block, a positioning pin, a plurality of cushion plates, and a back plate; the lifting platform is provided with a cushion block, the cushion block is fixedly connected to the plurality of cushion plates, a positioning pin is provided between the cushion block and the plurality of cushion plates, and the cushion block and the plurality of cushion plates are close to the back plate.

[0010] Beneficial effect: The multi-station extrusion test tooling of the present application fixes the pads and pads through screws and positioning pins, and places the battery on the pads and multiple pads, which can meet the needs of multiple battery extrusion tests. Compared with the prior art that can only perform one extrusion test on one battery at a time, the efficiency of lithium battery extrusion testing is improved.

[0011] Preferably, there are two cushion blocks.

[0012] Preferably, the distance between the two pads is a distance that allows batteries to be placed.

[0013] Preferably, a third pad is arranged on the pad block or the plurality of pads, and the third pad is provided with a pressure strip and bolts, and the bolts fix the pressure strip to the third pad.

[0014] Preferably, the third pad is provided with a guide rail, and the guide rail is movably connected to the bolt.

[0015] Preferably, there are a plurality of pressure strips.

[0016] Preferably, the third pad is arranged on the pad block.

[0017] Preferably, the back panel is vertically arranged on a wall or a wall bin of the equipment, and the shape of the back panel is rectangular or circular.

[0018] Preferably, the cushion block and the plurality of cushion plates are provided with screw holes, and the cushion block and the plurality of cushion plates are fixedly connected by nuts and screws.

[0019] Preferably, the top of the screw rod is provided with a thread matching with a nut.

[0020] The advantages of the utility model are:

[0021] 1. The multi-station extrusion test tooling of the present application fixes the pads and pads through screws and positioning pins, and places the battery on the pads and multiple pads, which can meet the needs of multiple battery extrusion tests. Compared with the prior art that can only perform one extrusion test on one battery at a time, the efficiency of lithium battery extrusion testing is improved.

[0022] 2. The multi-station extrusion test tooling of the present application can adapt to the extrusion of batteries of different lengths and widths in different directions by adjusting the distance between the two pads. By setting a third pad and a pressure strip, it can meet the extrusion test of the battery in the pole direction.

[0023] 3. The present application can adapt to batteries of different sizes, different squares and multiple squares by adjusting the height of the screw and the positioning pin. The multi-station extrusion test tooling can realize the extrusion test of batteries of different sizes, different squares and multiple squares, and perform pre-test thermal balance and post-test observation and disassembly at the same time, which can save the thermal balance time of two batteries and the post-test observation time, shortening the total time by about 4 to 6 hours, doubling the daily detection volume, maximizing the utilization of test resources, shortening the project development cycle and cost, and reducing the management difficulty and site occupancy of making multiple tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of a multi-station extrusion test tooling of an embodiment;

[0025] In the figure: 1-lifting platform; 2-pad; 3-locating pin; 4-first pad; 5-second pad; 6-nut; 7-screw; 8-back plate; 9-third pad; 10-pressure strip; 11-bolt. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] If no specific techniques or conditions are specified in the examples, they can be carried out according to the techniques or conditions described in the literature in the art or according to the product instructions.

[0028] Example 1

[0029] As attached Figure 1As shown, the present embodiment provides a multi-station extrusion test fixture, including a lifting platform 1, a cushion block 2, a positioning pin 3, a plurality of cushion plates, a nut 6, a screw 7 and a back plate 8; the plurality of cushion plates can be an even number of 2, 4, 6 or the like. The present embodiment is provided with a first cushion plate 4 and a second cushion plate 5, the lifting platform 1 is provided with a cushion block 2, the cushion block 2, the first cushion plate 4 and the second cushion plate 5 are all provided with screw holes (not shown in the figure), the screw 7 is connected to the screw holes of the first cushion plate 4 and the screw holes of the second cushion plate 5 through the screw holes of the cushion block 2, and the top of the screw 7 is tightened with the nut 6, the cushion block 2, the first cushion plate 4 and the second cushion plate 5 are connected and fixed, a positioning pin 3 is provided between the cushion block 2 and the first cushion plate 4 and between the first cushion plate 4 and the second cushion plate 5, the top of the screw 7 is provided with a thread (not shown in the figure) connected with the nut 6, the cushion block 2, the first cushion plate 4 and the second cushion plate 5 are close to the back plate 8, and the length of the screw 7 is selected according to actual conditions.

[0030] Two pads 2 are provided on the lifting platform 1. The distance between the two pads is adjusted according to the length, width and height of the battery. The set distance is capable of placing the battery without falling. The pads 2 are close to the back plate 8. The purpose of this is that the back plate 8 provides a reaction force for extrusion so that the battery will not fall due to extrusion. After the battery passes through the extruder, the battery can still meet the observation conditions on the pads 2.

[0031] The back plate 8 is vertically arranged on the wall or the wall bin of the equipment. In this embodiment, the back plate is arranged on the wall bin of the equipment. The cushion block 2, the first cushion plate 4 and the second cushion plate 5 are placed horizontally. The function of the back plate 8 is to provide a reaction force when the battery is placed on the cushion block 2, the first cushion plate 4 and the second cushion plate 5, so that the battery can be better extruded and prevented from falling during extrusion. The shape of the back plate 8 is rectangular or circular.

[0032] The cushion block 2 is provided with three screw holes, and the positions of the three screw holes are set at the edges of the cushion block 2. The shape of the three screw holes is like an "L" shape. After the screw rod 7 passes through the screw hole of the cushion block 2, the positioning pin 3 is inserted into the screw rod 7 to connect with the first cushion plate 4. The length of the positioning pin 3 is adjusted according to the length, width and height of the battery. The set length is longer than the actual length, width and height of the battery. The purpose is to be able to place the battery on the cushion plate 2, and leave a gap between the battery and the first cushion plate 4 to facilitate the placement of the battery.

[0033] The first pad 4 is also provided with three screw holes, and the positions of the screw holes of the first pad 4 correspond to the positions of the pad 2. There are two first pads 4, and the battery is placed between the two first pads 4, and the position where the battery is placed is exactly the position where there are no screw holes. The purpose of doing this is to facilitate the extrusion head of the extruder to perform extrusion. During extrusion, since the first pad 4 is close to the back plate 8, the back plate 8 can provide a reaction force against the battery, and the battery does not fall off during extrusion.

[0034] After the screw rod 7 passes through the screw hole of the first pad 4, the positioning pin 3 is inserted again to connect the second pad 5. The length of the positioning pin 3 is also set according to the length, width and height of the battery. The set length is longer than the actual length, width and height of the battery. The purpose is to be able to place the battery on the first pad 4, leaving a gap between the battery and the first pad 5 to facilitate the placement of the battery.

[0035] The second pad 5 is also provided with three screw holes, and the positions of the screw holes of the second pad 5 correspond to the positions of the pad 2. After the screw 7 passes through the screw holes of the second pad 5, the top of the screw 7 is tightened and fixed by using the nut 6. There are two second pads 5, and the battery is placed between the two second pads 5. The position where the battery is placed is exactly the position where there are no screw holes. The purpose of doing this is to facilitate the extrusion of the extrusion head of the extruder. During extrusion, since the second pad 5 is close to the back plate 8, the back plate 8 can provide a reaction force against the battery, and also prevent the battery from falling during extrusion.

[0036] In summary, the battery can be placed on the cushion block 2, the first cushion plate 4 and the second cushion plate 5. The multi-station extrusion test fixture of this embodiment can place three batteries. The battery has a total of 6 faces, and each two opposite faces are the same. The battery has 3 pairs of faces in different directions. This embodiment can place 3 pairs of faces in different directions of 3 batteries on the multi-station extrusion test fixture. Figure 1 As shown, the batteries placed on the cushion block 2 , the first cushion plate 4 and the second cushion plate press different surfaces of the batteries.

[0037] In this embodiment, by adjusting the length of the positioning pin 3 and the distance between the pad 2 and the pad, the multi-station extrusion test tooling meets the requirements of extrusion of square batteries of different sizes and in different directions, thereby improving the adaptability and utilization rate of the tooling, reducing the time and production cost of designing an extrusion tooling for each battery, and reducing the management difficulty and site occupancy of producing numerous tools.

[0038] The installation method provided in this embodiment can assemble multiple batteries at the same time before testing to achieve thermal balance of multiple batteries at the same time, then perform extrusion tests on each battery in steps, and finally observe the batteries at the same time to ensure that they are disassembled together after reaching a safe state, thereby improving test efficiency and shortening the project development cycle.

[0039] Example 2

[0040] As shown in the attached Figure 1 figure, the multi-station extrusion test tooling provided in this embodiment is described. The difference between this embodiment and Embodiment 1 is that a third backing plate 9 is provided. The third backing plate 9 is arranged on the spacer block 2 or the first backing plate 4 or the second backing plate 5. In this embodiment, the third backing plate 9 is arranged on the spacer block 2. The third backing plate 9 is provided with a guide rail (not shown in the figure), a bolt 11 and a pressing strip 10. The shape of the pressing strip 10 is "L"-shaped. The guide rail is arranged on both sides of the third backing plate 9 and is bar-shaped. The bolt 11 is arranged on the guide rail and is movably connected to the guide rail. The bolt 11 fixes the pressing strip 10 on the third backing plate 9. A cavity is formed between the pressing strip 10 and the third backing plate 9, and a battery is placed in the cavity. The function of the pressing strip 10 is to fix the battery on the third backing plate 9. The pressing strip 10 is provided with 2 - 5 according to the actual situation. As shown in the attached Figure 1 figure, 3 pressing strips 10 are provided in this embodiment. The function of the guide rail is to adjust the distance between the pressing strips 10 so that the battery is more evenly stressed.

[0041] The function of setting the third backing plate 9 in this embodiment is to prevent the battery from damaging the battery pole column during extrusion. Therefore, for the battery placed on the third backing plate 9, the direction of the battery pole column for extrusion testing, through the setting of the pressing strip 10, the battery pole column is protected from damage.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A multi-station extrusion test tool, characterized in that: The test tooling comprises a lifting platform (1), a cushion block (2), a positioning pin (3), a plurality of cushion plates, and a backing plate (8); the lifting platform (1) is provided with a cushion block (2), the cushion block (2) is fixedly connected to the plurality of cushion plates, a positioning pin (3) is provided between the cushion block (2) and the plurality of cushion plates, and the cushion block (2) and the plurality of cushion plates are closely attached to the backing plate (8).

2. The multi-station extrusion test tooling according to claim 1, characterized in that: The cushion blocks (2) are provided with two pieces.

3. The multi-station extrusion test tooling according to claim 2, characterized in that: The distance between the two cushion blocks (2) is a distance that allows batteries to be placed.

4. The multi-station extrusion test fixture according to claim 3, characterized in that: A third pad (9) is provided on the pad block (2) or the plurality of pads, and the third pad (9) is provided with a pressure strip (10) and a bolt (11), and the bolt (11) fixes the pressure strip (10) to the third pad (9).

5. The multi-station extrusion test tooling according to claim 4, characterized in that: The third pad (9) is provided with a guide rail, and the guide rail is movably connected to the bolt (11).

6. The multi-station extrusion test tooling according to claim 4, characterized in that: The pressure strips (10) are provided in plurality.

7. The multi-station extrusion test tooling according to claim 4, characterized in that: The third pad (9) is arranged on the pad block (2).

8. The multi-station extrusion test tooling according to claim 1, characterized in that: The back plate (8) is vertically arranged on a wall or a wall bin of the equipment, and the shape of the back plate (8) is rectangular or circular.

9. The multi-station extrusion test tool according to claim 1, characterized in that: The cushion block (2) and the plurality of cushion plates are provided with screw holes, and the cushion block (2) and the plurality of cushion plates are fixedly connected via nuts (6) and screw rods (7).

10. The multi-station extrusion test tooling according to claim 9, characterized in that: The top of the screw rod (7) is provided with a thread matching with the nut (6).

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