Manual fixture for testing electrode flexibility

Abstract

This utility model discloses a manual fixture for testing the flexibility of electrode sheets. The fixture allows for manual bending of the electrode sheet into a U-shape before assembly into the testing equipment. The manual fixture includes a base, two pairs of electrode sheet clamping blocks and plates, and a pressure block. Each side of the base is fitted with a pair of electrode sheet clamping blocks and plates, and a boss is provided between the two sides of the base. The upper surface of the boss has a concave first arc surface. The lower end of each electrode sheet clamping block slides against the side of the base to achieve horizontal movement. Each electrode sheet clamping plate is mounted on the electrode sheet clamping block and has several spring arms located on the inner side of the electrode sheet clamping block to clamp the end of the electrode sheet. The pressure block slides between the two electrode sheet clamping blocks in a vertical direction, and its lower surface has a second arc surface that matches the first arc surface.

Description

Technical Field

[0001] This utility model belongs to the field of electrode flexibility testing technology, and specifically refers to a manual fixture for electrode flexibility testing. Background Technology

[0002] Electrode flexibility is a crucial parameter affecting the tortuosity of the electrode in a shaped battery. It determines the state of the electrode after it is bent or even folded into a specific shape, and involves the external reaction force generated after the electrode is deformed.

[0003] Invention patent CN119198339B discloses a "Method, Equipment, Medium and Procedure for Evaluating the Mechanical Performance of Lithium-ion Batteries", which is used to accurately and efficiently evaluate the electrode flexibility performance of lithium-ion batteries. The process requires the user to bend the electrode to be tested into a specific shape (usually U-shaped), then fix both ends to the pressure plate and fixing plate of the mechanical performance evaluation equipment, and finally turn on the equipment to perform the test.

[0004] However, in actual production, the electrodes are assembled into the battery cell through mechanized processes. Manual bending is difficult to perfectly simulate the actual state of the electrodes in the battery cell and is easily affected by factors such as human operating experience and techniques, leading to deviations in the test results. Utility Model Content

[0005] The main purpose of this utility model is to provide a manual fixture for testing the flexibility of electrode sheets, which solves the problems existing in the prior art. The electrode sheet can be bent into a U-shape by manual operation and then assembled into the testing equipment.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A manual fixture for testing electrode flexibility includes a base, two pairs of electrode clamping blocks and electrode clamping plates, and a pressure block. Each side of the base is fitted with a pair of electrode clamping blocks and electrode clamping plates, and a boss is provided between the two sides of the base. The upper surface of the boss has a concave first arc surface. The lower end of each electrode clamping block slides against the side of the base to achieve horizontal movement. Each electrode clamping plate is mounted on the electrode clamping block and has several spring arms located on the inner side of the electrode clamping block to engage with the inner side of the electrode clamping block to clamp the end of the electrode. The pressure block slides between the two electrode clamping blocks in a vertical direction, and its lower surface has a second arc surface that matches the first arc surface.

[0008] The base is provided with a mounting plate on its side, and the inner side of the mounting plate is provided with a horizontal guide flange; the lower outer side of the electrode clamping block is provided with a horizontal guide groove that matches the horizontal guide flange; the lower end of the electrode clamping block is fitted between the mounting plate and the side wall of the boss, and the horizontal guide flange is slidably fitted in the horizontal guide groove.

[0009] Preferably, the lower outer side of the electrode clamping block is provided with a stepped portion, the horizontal guide groove is disposed in the stepped portion, and the end of the stepped portion has a cross-section, the end of the mounting plate movably abuts against the cross-section to restrict the electrode clamping block from continuing to slide.

[0010] The upper end of the electrode clip is fixed to the electrode clip block by bolts, and its inner side extends downward to form several spring arms, which are arranged side by side at equal intervals.

[0011] The lower end of the spring arm is provided with a guide slope, and the guide slope and the inner side of the electrode clamp block form a flared opening.

[0012] A vertical guide flange and a vertical guide groove are respectively provided between the end side of the pressure block and the electrode pressure block, and the vertical guide flange slides in the corresponding vertical guide groove.

[0013] Preferably, a recessed clearance groove is provided between the vertical guide flanges on the same side of the pressure block to avoid the spring arm of the electrode clamp.

[0014] A handle is fixed to the upper surface of the pressure block.

[0015] Both ends of the electrode clamp are provided with fixing blocks, which are used to fix the electrode clamp in the testing equipment.

[0016] Preferably, at least two parallel fixing blocks are provided on the same end face of the electrode clamping block.

[0017] After adopting the above technical solution, the present invention has the following technical effects:

[0018] This invention first inserts two electrode clamping blocks into the side of the base, then places the two ends of a flat electrode onto the upper surfaces of the two clamping blocks. Next, a pressure block is slid between the two clamping blocks in a vertical direction, causing the second arc surface of the pressure block to press down on the middle section of the electrode and bend it downwards, fitting it onto the first arc surface. Finally, the electrode clamping piece is installed onto the corresponding clamping block, and the end of the electrode is pressed and fixed. The first and second arc surfaces work together to fix the bent portion of the electrode into an arc shape, meeting testing requirements. Then, the entire manual fixture can be transferred to the testing equipment, and the two electrode clamping blocks can be fixed to the pressure plate and fixing plate of the testing equipment, respectively. Afterward, the base and pressure block can be removed, and testing can begin. Attached Figure Description

[0019] Figure 1 This is a perspective view of a specific embodiment of the present utility model.

[0020] Figure 2 This is an exploded view of a specific embodiment of the present utility model.

[0021] Figure 3 This is a schematic diagram illustrating the use of a specific embodiment of the present utility model.

[0022] Explanation of icon numbers:

[0023] 1-Base; 11-Boss; 12-First arc surface; 13-Mounting plate; 14-Horizontal guide flange; 2-Electrode clamping block; 21-Horizontal guide groove; 22-Step section; 23-Cross section; 24-Vertical guide groove; 25-Fixing block; 3-Electrode clamping piece; 31-Spring arm; 311-Guide slope; 4-Pressure block; 41-Second arc surface; 42-Vertical guide flange; 43-Leaning groove; 5-Handle; a-Electrode. Detailed Implementation

[0024] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0025] refer to Figure 1-2 As shown, this utility model discloses a manual fixture for testing the flexibility of electrode sheets, including a base 1, two pairs of electrode sheet clamping blocks 2 and electrode sheet clamping plates 3, and a pressing block 4.

[0026] A pair of electrode clamping blocks 2 and electrode clamping plates 3 are assembled on each side of the base 1, and a boss 11 is provided between the two sides of the base 1. The upper surface of the boss 11 is provided with a concave first arc surface 12.

[0027] The lower end of the electrode clamp 2 slides with the side of the base 1 to achieve horizontal movement;

[0028] The electrode clip 3 is mounted on the electrode clip block 2 and is provided with a number of spring arms 31 located on the inner side of the electrode clip block 2, which are used to cooperate with the inner side of the electrode clip block 2 to clamp the end of the electrode a.

[0029] The pressure block 4 slides between the two electrode clamping blocks 2 in the vertical direction, and its lower surface is provided with a second arc surface 41 that matches the first arc surface 12.

[0030] refer to Figure 3 As shown, through the above scheme, the present invention first installs two electrode clamping blocks 2 into the side of the base 1, then places the two ends of the flat electrode a onto the upper surfaces of the two electrode clamping blocks 2 respectively, and then slides the pressure block 4 between the two electrode clamping blocks 2 in the vertical direction, so that the second arc surface 41 of the pressure block 4 presses down on the middle section of the electrode a and bends it downwards, making it fit onto the first arc surface 12. Finally, the electrode clamping piece 3 is installed on the corresponding electrode clamping block and the end of the electrode a is pressed and fixed. The bending part of the electrode a can be fixed into an arc shape by the cooperation of the first arc surface 12 and the second arc surface 41, which meets the testing requirements. Then, the entire manual fixture can be transferred to the testing equipment, and the two electrode clamping blocks 2 are fixed on the pressure plate and the fixing plate of the testing equipment respectively. After that, the base 1 and the pressure block 4 can be removed, and the test can begin.

[0031] The following are specific embodiments of the present invention.

[0032] The base 1 is provided with a mounting plate 13 on its side, and a horizontal guide flange 14 is provided on the inner side of the mounting plate 13; the lower outer side of the electrode clamping block 2 is provided with a horizontal guide groove 21 that matches the horizontal guide flange 14; the lower end of the electrode clamping block 2 is fitted between the mounting plate 13 and the side wall of the boss 11 to avoid shaking, and the horizontal guide flange 14 is slidably fitted in the horizontal guide groove 21 to achieve guidance.

[0033] Furthermore, the lower outer side of the electrode clamp 2 is provided with a stepped portion 22, and a horizontal guide groove 21 is provided within the stepped portion 22. The end of the stepped portion 22 has a cross-section 23, and the end of the mounting plate 13 moves against the cross-section 23 to restrict the electrode clamp 2 from continuing to slide. Thus, when assembling the electrode clamp 2 on the base 1, the electrode clamp 2 can be forcefully pushed in until the mounting plate 13 abuts against the cross-section 23; and after the electrode clamp 2 is installed on the testing equipment, the base 1 can be pulled out in the reverse direction.

[0034] The upper end of the aforementioned electrode clip 3 is fixed to the electrode clip block 2 by bolt locking, and its inner side extends downward to form several spring arms 31, with each spring arm 31 arranged in parallel at equal intervals.

[0035] The lower end of the aforementioned spring arm 31 is provided with a guide slope 311, and a flared opening is formed between the guide slope 311 and the inner side of the electrode clamping block 2, making it easier for the end of the electrode a to enter between the spring arm 31 and the electrode clamping block 2.

[0036] A vertical guide flange 42 and a vertical guide groove 24 are respectively provided between the end side of the pressure block 4 and the electrode pressure block 2. The vertical guide flange 42 is slidably engaged in the corresponding vertical guide groove 24 to guide the up and down movement of the pressure block 4 and prevent the pressure block 4 from shaking left and right or back and forth.

[0037] Furthermore, a recessed clearance groove 43 is provided between the vertical guide flanges 42 on the same side of the aforementioned pressure block 4 to avoid the spring arm 31 of the electrode clip 3, thereby preventing assembly interference between components.

[0038] A handle 5 is fixed on the upper surface of the aforementioned pressure block 4 to facilitate lifting or lowering the pressure block 4.

[0039] Both ends of the electrode clamp 2 are provided with fixing blocks 25. The fixing blocks 25 are used to fix the electrode clamp 2 in the testing equipment. Specifically, the fixing blocks 25 are embedded in the corresponding mounting groove of the pressure plate or fixing plate of the testing equipment.

[0040] Furthermore, at least two parallel fixing blocks 25 are provided on the same end face of the electrode clamping block 2, which can ensure that the electrode clamping block 2 is not easy to shake after it is fixed.

[0041] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A manual fixture for testing electrode flexibility, characterized in that: Includes a base, two pairs of electrode clamping blocks and electrode clamping plates, and a pressing block; A pair of electrode clamping blocks and electrode clamping plates are assembled on each side of the base, and a boss is provided between the two sides of the base. The upper surface of the boss is provided with a concave first arc surface. The lower end of the electrode clamping block slides into the side of the base to achieve horizontal movement; The electrode clamp is mounted on the electrode clamp block and is provided with a number of spring arms located on the inner side of the electrode clamp block, which are used to cooperate with the inner side of the electrode clamp block to clamp the end of the electrode. The pressure block slides between the two electrode clamping blocks in the vertical direction, and its lower surface is provided with a second arc surface that matches the first arc surface.

2. The manual fixture for testing electrode flexibility as described in claim 1, characterized in that: The base is provided with a mounting plate on its side, and the inner side of the mounting plate is provided with a horizontal guide flange; the lower outer side of the electrode clamping block is provided with a horizontal guide groove that matches the horizontal guide flange; the lower end of the electrode clamping block is fitted between the mounting plate and the side wall of the boss, and the horizontal guide flange is slidably fitted in the horizontal guide groove.

3. The manual fixture for testing electrode flexibility as described in claim 2, characterized in that: The lower outer side of the electrode clamping block is provided with a stepped portion, the horizontal guide groove is provided in the stepped portion, and the end of the stepped portion has a cross section, the end of the mounting plate movably abuts against the cross section to restrict the electrode clamping block from continuing to slide.

4. The manual fixture for testing electrode flexibility as described in claim 1, characterized in that: The upper end of the electrode clip is fixed to the electrode clip block by bolts, and its inner side extends downward to form several spring arms, which are arranged side by side at equal intervals.

5. The manual fixture for testing electrode flexibility as described in claim 1, characterized in that: The lower end of the spring arm is provided with a guide slope, and the guide slope and the inner side of the electrode clamp block form a flared opening.

6. The manual fixture for testing electrode flexibility as described in claim 1, characterized in that: A vertical guide flange and a vertical guide groove are respectively provided between the end side of the pressure block and the electrode pressure block, and the vertical guide flange is slidably engaged in the corresponding vertical guide groove.

7. The manual fixture for testing electrode flexibility as described in claim 6, characterized in that: A recessed clearance groove is provided between the vertical guide flanges on the same side of the pressure block to avoid the spring arm of the electrode clamp.

8. The manual fixture for testing electrode flexibility as described in claim 1, characterized in that: A handle is fixed to the upper surface of the pressure block.

9. The manual fixture for testing electrode flexibility as described in claim 1, characterized in that: Both ends of the electrode clamp are provided with fixing blocks, which are used to fix the electrode clamp in the testing equipment.

10. The manual fixture for testing electrode flexibility as described in claim 9, characterized in that: At least two parallel fixing blocks are provided on the same end face of the electrode clamping block.

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