Square lithium battery monomer cell liquid injection hole seal nail welding poor product rework processing tooling

Abstract

The utility model discloses square lithium cell monomer electric core liquid injection hole seal nail welds bad product rework processing frock, including support, lithium battery electric core positioning mechanism and seal nail weld cutting mechanism, seal nail weld cutting mechanism includes the top plate of setting in the top of support, is equipped with the locating nut on the top plate, and the locating nut is threadedly connected with the push rod, and the push rod passes through the through -hole on the top plate, and the top of push rod is equipped with the handle, and the bottom of push rod is equipped with sawtooth drill assembly, and lithium battery electric core positioning mechanism is used for positioning clamping lithium battery electric core and keeps its liquid injection hole located just below sawtooth drill assembly, and still be equipped with the limit stop on the push rod between the top plate and handle. Through the cooperation of handle, push rod and sawtooth drill assembly, the operator only needs to rotate the handle, can fast, accurate to the seal nail weld of bad product carry out cutting processing, has improved the efficiency of rework processing greatly, has reduced the production delay of the rework processing, has improved the production capacity of lithium battery.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, specifically to a tooling for reworking defective square lithium battery cell filling hole sealing nail welds. Background Technology

[0002] In the lithium battery production process, the sealing and welding of the injection holes after electrolyte filling is crucial. However, due to various factors such as equipment failure and fluctuations in process parameters, defective sealing welds may occur. Currently, there is a lack of efficient, convenient, and specialized tools to ensure cell quality when reworking such defective products. Traditional processing methods are often inefficient and prone to damaging the cell cover, affecting cell performance and lifespan, thereby increasing production costs and reducing production efficiency. Therefore, there is an urgent need for a new type of tooling to solve these problems. Utility Model Content

[0003] 1. The technical problem to be solved:

[0004] Existing technologies suffer from low rework efficiency and easy damage to cell cover plates. This paper aims to achieve efficient and non-destructive rework of defective products, thereby improving the overall quality and efficiency of lithium battery production.

[0005] To address the aforementioned technical problems, this utility model provides a tooling for reworking defective square lithium battery cell filling hole sealing nail welds.

[0006] 2. Technical Solution:

[0007] A rework fixture for defective sealing welds on the injection holes of square lithium-ion battery cells includes a bracket, a lithium-ion battery cell positioning mechanism, and a sealing weld cutting mechanism. The sealing weld cutting mechanism includes a top plate mounted on the top of the bracket, a positioning nut on the top plate, and a push rod internally threaded onto the positioning nut. The push rod passes through a through hole in the top plate, has a handle at its top, and a serrated drill assembly at its bottom. The lithium-ion battery cell positioning mechanism is used to position and clamp the lithium-ion battery cell and keep its injection hole directly below the serrated drill assembly. A limiting block is also provided on the push rod between the top plate and the handle. When the serrated drill assembly completely cuts off the sealing weld, the limiting block abuts against the top of the top plate.

[0008] Furthermore, the lithium battery cell positioning mechanism includes a support plate fixed to the bracket, on which the lithium battery cell is placed. Two C-shaped clamps are symmetrically arranged on both sides of the lithium battery cell. A rectangular notch is provided at the bottom of the clamps. The support plate is located inside the notch. Two sliders are symmetrically arranged on both sides of the notch. The sliders are slidably connected to slide rails, which are fixed to both sides of the support plate. A connecting plate is provided at the bottom of the notch, and a driving block is provided on the connecting plate. The driving blocks on the two clamps are respectively threaded to the opposite external threads on both sides of a bidirectional lead screw. The bidirectional lead screw is rotatably connected to the bracket, and an adjustment knob is fixedly connected to one end of the bidirectional lead screw.

[0009] Furthermore, the limiting block is welded or threaded to the push rod.

[0010] Furthermore, the sawtooth drill assembly includes a sawtooth drill bit and a connecting sleeve. The bottom of the sawtooth drill bit is hollow and sawtooth-shaped, used to cut the sealing stud weld on the liquid injection hole of the lithium battery cell. The top of the sawtooth drill bit is provided with an external thread connecting to the internal thread hole at the bottom of the sleeve. The top of the sleeve is also provided with an internal thread hole connecting to the external thread on the push rod.

[0011] Furthermore, the handle is disc-shaped, and the push rod is fixed at the center of the handle.

[0012] Furthermore, the surface of the handle is provided with anti-slip texture.

[0013] Furthermore, the bottom of the bracket is provided with an anti-slip pad.

[0014] Furthermore, the support plate is provided with a lithium battery cell positioning groove.

[0015] 3. Beneficial effects:

[0016] The tooling for reworking defective lithium battery cell filling hole sealing studs of this utility model has the following significant advantages compared with the prior art:

[0017] 1. High efficiency: Through the cooperation of the handle, push rod and saw drill assembly, the operator only needs to rotate the handle to quickly and accurately cut the seal welds of defective products, which greatly improves the efficiency of rework, reduces production delays caused by rework, and increases the production capacity of lithium batteries.

[0018] 2. Non-destructive: The special design of the sawtooth drill assembly can effectively cut the sealing weld while avoiding scratches, deformation and other adverse effects on the cell cover plate. This ensures the appearance quality and internal structural integrity of the cell, reduces the probability of cell scrap due to rework, improves the product qualification rate and reduces production costs.

[0019] 3. Disassembly and Maintainability: The components are connected by threaded connections, facilitating the disassembly and replacement of worn parts. For example, when the sawtooth drill bit wears out, it can be quickly disassembled and replaced with a new sawtooth drill bit without having to replace the entire tooling, reducing maintenance and operating costs and extending the tooling's service life.

[0020] 4. Simple structure and easy operation: The tooling structure of this utility model is compact and reasonably designed. The parts are easy to process and manufacture. Operators can master the use of the tooling without complicated training, which reduces the difficulty of operation and the skill requirements of operators, making it easy to promote and apply on the production line. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the tooling for reworking defective square lithium battery cell filling hole sealing nails.

[0022] Figure 2 This is a side view of the mating structure of the clamping plate and the support plate of this utility model;

[0023] Figure 3 This is a schematic diagram of the sawtooth drill assembly of this utility model. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings.

[0025] As attached Figure 1 To be continued Figure 3 , Specific implementation examples:

[0027] A rework fixture for defective sealing welds on the injection holes of square lithium battery cells includes a bracket 1, a lithium battery cell positioning mechanism, and a sealing weld cutting mechanism. The sealing weld cutting mechanism includes a top plate 2 mounted on the top of the bracket 1, a positioning nut 3 on the top plate 2, and a push rod 4 internally threaded onto the positioning nut 3. The push rod 4 passes through a through hole on the top plate 2, and a handle 5 is mounted on the top of the push rod 4. A serrated drill assembly is mounted on the bottom of the push rod 4. The lithium battery cell positioning mechanism is used to position and clamp the lithium battery cell and keep its injection hole directly below the serrated drill assembly. A limiting block 6 is also provided on the push rod 4 between the top plate 2 and the handle 5. When the serrated drill assembly completely cuts off the sealing weld, the limiting block 6 abuts against the top of the top plate 2.

[0028] When using the rework tooling for defective seal welds on the injection hole of a square lithium battery cell according to this invention, the lithium battery cell is first fixed below the serrated drill assembly by the lithium battery cell positioning mechanism, keeping the injection hole and the serrated drill assembly opposite each other. The handle 5 is rotated, and the handle 5 drives the push rod 4 to rotate within the positioning nut 3. The push rod 4 drives the serrated drill assembly to rotate and advance. The serrated drill assembly cuts the seal weld on the injection hole. When the limit block 6 abuts against the top of the top plate 2, the seal weld is completely cut off. The limit block 6 prevents the serrated drill assembly from continuing to advance, thus avoiding damage to the lithium battery cell.

[0029] Specifically, the lithium battery cell positioning mechanism includes a support plate 7 fixed to the bracket 1. The lithium battery cell is placed on the support plate 7. Two U-shaped clamps 8 are symmetrically arranged on both sides of the lithium battery cell. The two U-shaped clamps 8 clamp the four corners of the lithium battery cell to maintain its stable position relative to the saw drill assembly. A rectangular notch is provided at the bottom of the clamps 8. The support plate 7 is located inside the notch. Two sliders 9 are symmetrically arranged on both sides of the notch. The sliders 9 are slidably connected to the slide rails 10. The slide rails 10 are fixed on both sides of the support plate 7. A connecting plate 11 is provided at the bottom of the notch. A drive block 12 is provided on the connecting plate 11. The drive blocks 12 on the two clamps 8 are respectively threaded to the two opposite external threads of the bidirectional lead screw 13. The bidirectional lead screw 13 is rotatably connected to the bracket 1. One end of the bidirectional lead screw 13 is fixedly connected to the adjustment knob 14.

[0030] When the adjustment knob 14 is turned, the adjustment knob 14 drives the bidirectional lead screw 13 to rotate. The bidirectional lead screw 13 drives the two drive blocks 12 to move in opposite directions, thereby driving the two clamping plates 8 to simultaneously clamp and fix the lithium battery cell on the support plate 7 in the center, and to position and clamp the lithium battery cell.

[0031] The limiting block 6 is welded or threaded to the push rod 4. When welded, the position of the limiting block 6 is fixed, and when threaded, it can be adjusted to a certain extent to control the cutting depth of the saw drill assembly.

[0032] The serrated drill assembly includes a serrated drill bit 15 and a connecting sleeve 16. The bottom of the serrated drill bit 15 is hollow and serrated, used to cut the sealing weld on the electrolyte injection hole of the lithium battery cell. The top of the serrated drill bit 15 has an external thread connecting to the internal thread hole at the bottom of the connecting sleeve 16. The top of the connecting sleeve 16 also has an internal thread hole connecting to the external thread on the push rod 4. During use, the serrated drill bit 15 and the electrolyte injection hole of the lithium battery cell are concentric, thereby cutting the sealing weld around the electrolyte injection hole. If the serrated drill bit is found to be severely worn or damaged during use, the connecting sleeve can be unscrewed with a tool, and a new serrated drill bit can be replaced to continue rework operations using the tooling.

[0033] The handle 5 is disc-shaped, and the push rod 4 is fixed in the center of the handle 5. The disc shape facilitates the application of force. The surface of the handle 5 is provided with anti-slip texture.

[0034] The bottom of bracket 1 is equipped with an anti-slip pad to prevent the entire fixture from shifting.

[0035] The support plate 7 is provided with a lithium battery cell positioning groove. The length and width of the positioning groove can be slightly larger than the lithium battery cell, which makes it convenient to put the lithium battery cell in while controlling the approximate position of the cell, thus facilitating the subsequent positioning and clamping of the clamping plate.

[0036] Although the present invention has been disclosed above with reference to preferred embodiments, these are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of protection of the claims of this application.

Claims

1. A tooling for reworking defective square lithium battery cell filler hole sealing nails, characterized in that, The device includes a bracket, a lithium battery cell positioning mechanism, and a sealing weld cutting mechanism. The sealing weld cutting mechanism includes a top plate mounted on top of the bracket, a positioning nut on the top plate, and a push rod internally threaded onto the positioning nut. The push rod passes through a through hole in the top plate, has a handle at its top, and a serrated drill assembly at its bottom. The lithium battery cell positioning mechanism is used to position and clamp the lithium battery cell and keep its liquid injection hole directly below the serrated drill assembly. A limiting block is also provided on the push rod between the top plate and the handle. When the serrated drill assembly completely cuts off the sealing weld, the limiting block abuts against the top of the top plate.

2. The tooling for reworking defective square lithium battery cell injection hole sealing studs according to claim 1, characterized in that, The lithium battery cell positioning mechanism includes a support plate fixed to the bracket. The lithium battery cell is placed on the support plate. Two C-shaped clamps are symmetrically arranged on both sides of the lithium battery cell. A rectangular notch is provided at the bottom of the clamps. The support plate is located inside the notch. Two sliders are symmetrically arranged on both sides of the notch. The sliders are slidably connected to slide rails. The slide rails are fixed on both sides of the support plate. A connecting plate is provided at the bottom of the notch. A driving block is provided on the connecting plate. The driving blocks on the two clamps are respectively threaded to the opposite external threads on both sides of a bidirectional lead screw. The bidirectional lead screw is rotatably connected to the bracket. One end of the bidirectional lead screw is fixedly connected to an adjustment knob.

3. The tooling for reworking defective square lithium battery cell injection hole sealing studs according to claim 1, characterized in that, The limiting block is welded or threaded to the push rod.

4. The tooling for reworking defective square lithium battery cell injection hole sealing studs according to claim 1 or 2, characterized in that, The sawtooth drill assembly includes a sawtooth drill bit and a connecting sleeve. The bottom of the sawtooth drill bit is hollow and sawtooth-shaped, used to cut the sealing stud weld on the liquid injection hole of the lithium battery cell. The top of the sawtooth drill bit is provided with an external thread to connect to the internal thread hole at the bottom of the sleeve. The top of the sleeve is also provided with an internal thread hole to connect to the external thread on the push rod.

5. The tooling for reworking defective square lithium battery cell injection hole sealing studs according to claim 1, characterized in that, The handle is disc-shaped, and the push rod is fixed at the center of the handle.

6. The tooling for reworking defective square lithium battery cell injection hole sealing studs according to claim 1, characterized in that, The surface of the handle has anti-slip texture.

7. The tooling for reworking defective square lithium battery cell injection hole sealing studs according to claim 1, characterized in that, The bottom of the bracket is equipped with an anti-slip pad.

8. The tooling for reworking defective square lithium battery cell injection hole sealing studs according to claim 2, characterized in that, The support plate is provided with a lithium battery cell positioning groove.

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