Manual jig for pole piece flexibility detection

Abstract

This utility model discloses a manual fixture for testing the flexibility of electrode sheets, which can manually bend the electrode sheet into a U-shape and assemble it into the testing equipment. It includes a fixed base assembly, a movable base assembly, and two clamps. The fixed base assembly includes a fixture base, a mounting block, and two linkage swing arms. The mounting block is located at the rear end of the fixture base, and the rear ends of the two linkage swing arms are rotatably engaged with the mounting block and rotate synchronously. The movable base assembly includes a sliding seat and two pivot brackets. The sliding seat is slidably engaged with the front end of the fixture base in the front-rear direction. The front ends of the two pivot brackets are pivotally engaged with the sliding seat, and their rear ends are connected or separated from the front ends of the two linkage swing arms as the sliding seat slides. The pivot axis between the pivot brackets and the sliding seat is collinear with the pivot axis between the corresponding linkage swing arms and the mounting block. The two clamps are elastically and tightly engaged within the two pivot brackets to achieve a detachable connection, and the clamps are used to hold the ends of the electrode sheet.

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 accurately simulate the actual state of the electrodes within the cell and is easily affected by factors such as human operating experience and techniques, leading to deviations in 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 fixed base assembly, a movable base assembly, and two clamps. The fixed base assembly includes a fixture base, a mounting block, and two linkage swing arms. The mounting block is disposed at the rear end of the fixture base, and the rear ends of the two linkage swing arms are rotatably engaged with the mounting block and rotate synchronously. The movable base assembly includes a sliding seat and two pivot brackets. The sliding seat is slidably engaged with the front end of the fixture base in a front-rear direction. The front ends of the two pivot brackets are pivotally engaged with the sliding seat, and their rear ends are connected or separated from the front ends of the two linkage swing arms as the sliding seat slides. The axis of rotation between the pivot brackets and the sliding seat is collinear with the axis of rotation between the corresponding linkage swing arms and the mounting block. The two clamps are elastically and tightly engaged within the two pivot brackets to achieve a detachable connection, and the clamps are used to hold the ends of the electrode.

[0008] The two ends of the pivot bracket are flipped with the mounting block and the sliding seat as fulcrums, respectively, so as to realize the synchronous flipping of the two clamps and the switching between the two coplanar and parallel states.

[0009] Preferably, the linkage arm is installed in front of the mounting block, and its shaft extends through to the rear of the mounting block and is coaxially connected to a gear; the gears connected to the two linkage arms mesh with each other.

[0010] Preferably, at least one of the linkage swing arms of the fixed base assembly is fitted with a torsion spring on its rotating shaft. The two ends of the torsion spring are respectively fixedly connected to the mounting block and the linkage swing arm, and are used to drive the linkage swing arm to reset so as to drive the two pivot brackets and the clamps inside to rotate to a parallel state. A buckle is provided on both the left and right sides of the fixture base. The buckle is used to hook the pivot bracket to keep the two clamps in a parallel state. The pivot bracket is provided with a slot for the buckle to hook.

[0011] The front end of the linkage swing arm is provided with a spline that is connected to the rear end key of the pivot bracket, and the spline is embedded in the rear end face of the pivot bracket.

[0012] The movable seat assembly also includes a fixing rod; one end of the fixing rod is rotatably fitted to the upper part of the front end of one of its pivot brackets, and the other end is detachably connected to the upper part of the front end of another pivot bracket when the two clamps are in a parallel state; a limiting part is provided behind the other end of the fixing rod, and a limiting groove for the limiting part to be inserted is provided at the corresponding position of the pivot bracket.

[0013] The front end of the fixture base is provided with a sliding groove, and a slider that slides in the sliding groove is provided below the sliding seat.

[0014] The pivot bracket forms a slot for the clamp to be inserted and engaged. A first spring piece and a positioning block are fixed at both ends of the slot, respectively. Positioning grooves are provided on both the front and rear end faces of the clamp 3. The first spring piece is tightly engaged in one of the positioning grooves of the clamp and the other positioning groove is nested on the positioning block.

[0015] The clamping seat includes a clamping plate, a clamping block, a limiting block, and a second spring sheet; the clamping block slides along the side of the clamping plate in a direction perpendicular to the clamping plate, and several clamping claws parallel to the clamping plate are respectively provided on both sides of the clamping block, as well as a limiting plate; the limiting block is installed on the side of the clamping plate and covers the clamping block; the second spring sheet is fixed on the clamping plate and elastically abuts against the limiting plate.

[0016] Preferably, the jig base is provided with lifting rods on both sides; the pivot bracket is provided with through holes opposite to the limiting plate; when the two clamps are in a coplanar state, the lifting rods pass through the through holes and abut against the limiting plate to compress the second spring sheet; the limiting block is recessed to form a guide groove that matches the clamping block.

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

[0018] This invention first inserts two clamps into two pivot brackets, and then flips the pivot brackets to both sides so that the two clamps are in a coplanar state. Then, the two ends of the flat electrode are placed into the two clamps and clamped. Then, the two pivot brackets are flipped towards the middle at the same time, thereby driving the two clamps to flip synchronously until they are parallel. This allows the electrode to be bent into a U-shape. Since the rear ends of the two linkage swing arms rotate synchronously, it can be ensured that the two pivot brackets (i.e., the two clamps) flip synchronously, thus ensuring that the two ends of the electrode are subjected to the same force, and the two ends of the electrode can be bent into an arc shape, which meets the testing requirements.

[0019] After the electrode is bent into place, the movable seat assembly and the two clamps can be removed from the fixed seat assembly and transferred to the testing equipment. Then, the two clamps are fixed to the pressure plate and the fixed plate of the testing equipment, and the test can begin. Attached Figure Description

[0020] Figure 1 This is an exploded view of a specific embodiment of the present utility model.

[0021] Figure 2 This is a perspective view of the initial state of a specific embodiment of the present utility model.

[0022] Figure 3 This is a top view of the initial state of a specific embodiment of the present utility model.

[0023] Figure 4 This is a front view of the initial state of a specific embodiment of the present utility model.

[0024] Figure 5 This is a perspective view of the bent state of a specific embodiment of the present invention.

[0025] Figure 6 This is a top view of the bent state of a specific embodiment of the present utility model.

[0026] Figure 7 This is a front view of the bent state of a specific embodiment of the present utility model.

[0027] Figure 8 This is a schematic diagram illustrating the use of a specific embodiment of the present utility model.

[0028] Explanation of icon numbers:

[0029] 1-Fixed base assembly; 11-Jig base; 111-Slide groove; 12-Mounting block; 13-Linkage swing arm; 131-Spline; 14-Gear; 15-Torsion spring; 16-Snap fastener; 17-Push-up rod;

[0030] 2-Modular seat assembly; 21-Sliding seat; 211-Slider; 22-Pivotal bracket; 221-Slot; 222-Limiting slot; 223-Slot; 224-Through hole; 23-Fixing rod; 231-Limiting part; 24-First spring piece; 25-Positioning block;

[0031] 3-Clamping seat; 31-Clamping plate; 311-Positioning groove; 32-Clamping block; 321-Clamping claw; 322-Limiting plate; 33-Limiting block; 331-Guide groove; 34-Second spring piece;

[0032] 4-Support rod;

[0033] α-polaris. Detailed Implementation

[0034] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0035] refer to Figures 1 to 7 As shown, this utility model discloses a manual fixture for testing the flexibility of electrode sheets, including a fixed seat assembly 1, a movable seat assembly 2, and two clamps 3;

[0036] The fixed base assembly 1 includes a fixture base 11, a mounting block 12, and two linkage swing arms 13; the mounting block 12 is located at the rear end of the fixture base 11, and the rear ends of the two linkage swing arms 13 are respectively rotatably engaged on the mounting block 12 and rotate synchronously.

[0037] The movable seat assembly 2 includes a sliding seat 21 and two pivot brackets 22; the sliding seat 21 is slidably fitted to the front end of the fixture base 11 in the front-back direction; the front ends of the two pivot brackets 22 are respectively pivotally fitted to the sliding seat 21, and the rear ends of the two brackets are respectively connected to or separated from the front ends of the two linkage swing arms 13 as the sliding seat 21 slides; the pivot axis between the pivot brackets 22 and the sliding seat 21 is collinear with the pivot axis between the corresponding linkage swing arms 13 and the mounting block 12.

[0038] Two clamps 3 are elastically and tightly fitted into two pivot brackets 22 to achieve a detachable connection. The clamps 3 are used to hold the end of the electrode a.

[0039] The two ends of the pivot bracket 22 are flipped with the mounting block 12 and the sliding seat 21 as fulcrums, respectively, so as to realize the synchronous flipping of the two clamps 3 and the switching between the two coplanar and parallel states.

[0040] refer to Figures 1 to 8 As shown, through the above scheme, the present invention first inserts the two clamps 3 into the two pivot brackets 22 respectively, and then flips the pivot brackets 22 to both sides so that the two clamps 3 are in a coplanar state. Figures 2 to 4 Then, the two ends of the flat electrode a are placed into the two clamps 3 and clamped. Then, the two pivot brackets 22 are flipped towards the middle at the same time, thereby driving the two clamps 3 to flip synchronously until they are parallel. Figures 5 to 7 This allows electrode a to be bent into a U-shape. Since the rear ends of the two linkage arms 13 rotate synchronously, it ensures that the two pivot brackets 22 (i.e., the two clamps 3) rotate synchronously, thus ensuring that the two ends of electrode a are subjected to the same force, and the two ends of electrode a can be bent into an arc shape, which meets the test requirements.

[0041] refer to Figure 8 As shown, after electrode a is bent into place, the movable seat assembly 2 and the two clamps 3 can be removed from the fixed seat assembly 1 and transferred to the testing equipment. Then, the two clamps 3 are fixed to the pressure plate and the fixed plate of the testing equipment respectively, and then the test can begin.

[0042] The following are specific embodiments of the present invention.

[0043] The aforementioned linkage swing arm 13 is installed in front of the mounting block 12, and its rotating shaft extends through to the rear of the mounting block 12 and is coaxially connected to a gear 14; the gears 14 connected to the two linkage swing arms 13 mesh with each other to achieve synchronous rotation of the two linkage swing arms 13.

[0044] Furthermore, at least one of the linkage swing arms 13 of the aforementioned fixed base assembly 1 is fitted with a torsion spring 15 on its rotating shaft. The two ends of the torsion spring 15 are fixedly connected to the mounting block 12 and the linkage swing arm 13, respectively, to drive the linkage swing arm 13 to reset so as to drive the two pivot brackets 22 and the clamps 3 inside them to flip to a parallel state.

[0045] Secondly, a buckle 16 is provided on both the left and right sides of the fixture base 11. The buckle 16 is used to hook the pivot bracket 22 to keep the two clamps 3 in a parallel state. The pivot bracket 22 is provided with a slot 221 for the buckle 16 to hook. That is, by providing the buckle 16, the pivot bracket 22 can be fixed against the elastic force of the torsion spring 15, making it convenient for the operator to insert the electrode a into the clamp 3 without having to fix the pivot bracket 22 by hand.

[0046] The front end of the aforementioned linkage arm 13 is provided with a spline 131 that is keyed to the rear end of the pivot bracket 22. The spline 131 is embedded in the rear end face of the pivot bracket 22. Since the front end of the pivot bracket 22 is rotatably connected to the sliding seat 21, while the rear end is keyed to the linkage arm 13, there will be no relative rotation. Therefore, when the movable seat assembly 2 is installed on the fixed seat assembly 1, the pivot bracket 22 and the linkage arm 13 can be regarded as a whole. The whole formed by the two takes the pivot of the linkage arm 13 as the swing fulcrum of the rear end of the pivot bracket 22, and the swing fulcrums of the front and rear ends of the pivot bracket 22 are collinear, so the pivot bracket 22 can swing / rotate normally.

[0047] The aforementioned movable seat assembly 2 also includes a fixing rod 23; one end of the fixing rod 23 is rotatably fitted onto the upper part of the front end of one of its pivot brackets 22, and the other end is detachably connected to the upper part of the front end of another pivot bracket when the two clamps 3 are in a parallel state. Thus, after the electrode a is bent into a U-shape, the two pivot brackets 22 can be fixed relative to each other, and the fixing rod 23 is used to limit the distance between them to maintain the parallel state of the two clamps 3, so that the electrode a is less likely to be deformed by force when the movable seat assembly 2 is transferred subsequently.

[0048] Furthermore, a limiting part 231 is provided at the rear of the other end of the aforementioned fixing rod 23, and a limiting groove 222 for the limiting part 231 to be inserted is provided at the corresponding position of the pivot bracket 22.

[0049] The jig base 11 has a groove 111 at its front end, and a slider 211 that slides within the groove 111 is located below the sliding seat 21. This allows for the positioning and guidance of the sliding seat 21 when it slides within the jig base 11.

[0050] The aforementioned pivot bracket 22 forms a slot 223 for the clamp 3 to be inserted and fitted. A first spring piece 24 and a positioning block 25 are fixed to both ends of the slot 223, respectively. Positioning grooves 311 are provided on both the front and rear ends of the clamp 3. The first spring piece 24 is tightly fitted into one of the positioning grooves 311 of the clamp 3, and the other positioning groove 311 is nested on the positioning block 25. Simultaneously, the width of the positioning groove 311 is equal to the thickness of the pressure plate or fixing plate of the testing equipment, so that the clamp 3 can be directly transferred to the pressure plate or fixing plate of the testing equipment and positioned. Thus, the elastic force provided by the first spring piece 24 enables the clamp 3 to be elastically and tightly fitted into the corresponding pivot bracket 22, which not only allows the clamp 3 and the pivot bracket 22 to be relatively fixed for synchronous rotation, but also facilitates the removal of the clamp 3 in subsequent processes.

[0051] The aforementioned clamping base 3 includes a clamping plate 31, a clamping block 32, a limiting block 33, and a second spring plate 34. The clamping block 32 is slidably fitted on the side of the clamping plate 31 along a direction perpendicular to the clamping plate 31, and several clamping claws 321 parallel to the clamping plate 31 are respectively provided on both sides of the clamping block 32, as well as a limiting plate 322. The limiting block 33 is locked to the side of the clamping plate 31 by bolts and covers the clamping block 32 to prevent the clamping block 32 from falling off the clamping plate 31. The second spring plate 34 is fixed on the clamping plate 31 and elastically abuts against the limiting plate 322. Thus, under the action of the second spring plate 34, the clamping claws 321 are brought close to the clamping plate 31 by elastic force, thereby clamping the end of the electrode a.

[0052] Furthermore, both sides of the aforementioned fixture base 11 are provided with lifting rods 17; the pivot bracket 22 is provided with through holes 224 opposite to the limiting plate 322; when the two clamps 3 are in a coplanar state ( Figures 2 to 4 The lifting rod 17 passes through the through hole 224 and abuts against the limiting plate 322 to compress the second spring 34. This resists the elastic force of the second spring 34 and separates the gripper 321 from the clamping plate 31, automatically opening the gripper 321 to make it open, which is convenient for inserting the electrode a without having to manually pry open the gripper 321.

[0053] Meanwhile, the aforementioned limiting block 33 has a recessed guide groove 331 that matches the clamping block 32.

[0054] This utility model also includes a support rod 4; (see reference) Figures 2 to 4 As shown, the support rod 4 is movably inserted through the sliding seat 21 and supports the rear end of the pivot bracket 22 when the pivot bracket 22 and the clamp 3 inside it are in a horizontal state. When the electrode a needs to be bent into a U-shape, the support rod 4 is first pulled out, and then the pivot bracket 22 is flipped over.

[0055] 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 fixed base assembly, a movable base assembly, and two clamps; The fixed base assembly includes a fixture base, a mounting block, and two linkage swing arms; the mounting block is located at the rear end of the fixture base, and the rear ends of the two linkage swing arms are respectively rotatably engaged on the mounting block and rotate synchronously. The movable seat assembly includes a sliding seat and two pivot brackets; the sliding seat is slidably fitted to the front end of the fixture base along the front-rear direction; the front ends of the two pivot brackets are respectively pivotally fitted to the sliding seat, and the rear ends of the two brackets are respectively connected to or separated from the front ends of the two linkage swing arms as the sliding seat slides; the pivot axis between the pivot brackets and the sliding seat is collinear with the pivot axis between the corresponding linkage swing arms and the mounting block. Two clamps are elastically fitted into two pivot brackets to achieve a detachable connection. The clamps are used to hold the ends of the electrode sheets.

2. The manual fixture for testing electrode flexibility as described in claim 1, characterized in that: The two ends of the pivot bracket are flipped with the mounting block and the sliding seat as fulcrums, respectively, so as to realize the synchronous flipping of the two clamps and the switching between the two coplanar and parallel states.

3. The manual fixture for testing electrode flexibility as described in claim 2, characterized in that: The linkage swing arm is installed in front of the mounting block, and its shaft extends through to the rear of the mounting block and is coaxially connected to a gear; the gears connected to the two linkage swing arms mesh with each other.

4. The manual fixture for testing electrode flexibility as described in claim 3, characterized in that: At least one of the linkage swing arms of the fixed base assembly is fitted with a torsion spring on its pivot shaft. The two ends of the torsion spring are fixedly connected to the mounting block and the linkage swing arm, respectively, to drive the linkage swing arm to reset so as to drive the two pivot brackets and the clamps inside to rotate to a parallel state. A buckle is provided on both the left and right sides of the fixture base. The buckle is used to hook the pivot bracket to keep the two clamps in a parallel state. The pivot bracket is provided with a slot for the buckle to hook.

5. The manual fixture for testing electrode flexibility as described in claim 2, characterized in that: The front end of the linkage arm is provided with a spline that is connected to the rear end key of the pivot bracket, and the spline is embedded in the rear end face of the pivot bracket.

6. The manual fixture for testing electrode flexibility as described in claim 2, characterized in that: The movable seat assembly also includes a fixing rod; one end of the fixing rod is rotatably fitted to the upper part of the front end of one of its pivot brackets, and the other end is detachably connected to the upper part of the front end of another pivot bracket when the two clamps are in a parallel state; a limiting part is provided behind the other end of the fixing rod, and a limiting groove for the limiting part to be inserted is provided at the corresponding position of the pivot bracket.

7. The manual fixture for testing electrode flexibility as described in claim 2, characterized in that: The front end of the fixture base is provided with a sliding groove, and a slider that slides in the sliding groove is provided below the sliding seat.

8. The manual fixture for testing electrode flexibility as described in claim 2, characterized in that: The pivot bracket forms a slot for the clamp to be inserted and engaged. A first spring piece and a positioning block are fixed at both ends of the slot, respectively. Positioning grooves are provided on both the front and rear end faces of the clamp. The first spring piece is tightly engaged in one of the positioning grooves of the clamp and the other positioning groove is nested on the positioning block.

9. The manual fixture for testing electrode flexibility as described in claim 2, characterized in that: The clamping seat includes a clamping plate, a clamping block, a limiting block, and a second spring sheet; the clamping block slides along the side of the clamping plate in a direction perpendicular to the clamping plate, and several clamping claws parallel to the clamping plate are respectively provided on both sides of the clamping block, as well as a limiting plate; the limiting block is installed on the side of the clamping plate and covers the clamping block; the second spring sheet is fixed on the clamping plate and elastically abuts against the limiting plate.

10. The manual fixture for testing electrode flexibility as described in claim 9, characterized in that: Both sides of the fixture base are provided with lifting rods; the pivot bracket is provided with a through hole opposite to the limiting plate; when the two clamps are in a coplanar state, the lifting rod passes through the through hole and abuts against the limiting plate to compress the second spring sheet; the limiting block is recessed to form a guide groove that matches the clamping block.

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