Ball pulling device for lithium battery production and repair

Abstract

A ball pulling device for lithium battery production and repair belongs to the technical field of lithium battery production. The upper end of the inner side wall of the battery limiting box is a wedge-shaped surface, and the lower end of the inner side wall of the battery limiting box encloses a placing space and is inserted into a battery. The upper end of the supporting column is connected with one end of the positioning rod in a limiting mode. The other end of the positioning rod is spot-welded. And the using end of the spot welding head corresponds to a battery liquid injection hole. A limiting block is arranged at the lower end of the supporting column, a hemispherical clamping block is arranged at one end of the limiting block, a clamping groove is formed in the battery limiting box, and the hemispherical clamping block is in interference clamping connection with the clamping groove. The outer wall of the battery limiting box is provided with connecting lugs, and the connecting lugs are coaxially arranged and fixedly connected through a shaft rod inserted into the connecting lugs. According to the utility model, the stable clamping and positioning of the battery cell are realized, and the quality fluctuation caused by insufficient operation stability is eliminated; and the spot welding head is limited and positioned, so that accurate alignment of the spot welding head and a battery cell liquid injection port is ensured, and the problem of reaming out-of-round caused by alignment deviation is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lithium battery production repair is with pull ball device belongs to lithium battery production technical field. BACKGROUND

[0002] In the lithium ion battery production manufacturing process, the electric core after the liquid injection chemical process needs to be sealed through the sealing process to isolate the external environment and prevent electrolyte leakage. For some electric cores that need to be supplemented and reformed due to process abnormalities, the positioning steel ball at the liquid injection port needs to be removed to realize the repair operation.

[0003] The existing repair process mainly adopts manual operation mode, which has the following technical defects:

[0004] 1. Insufficient operation stability: the operator needs to support the electric core throughout the process, and the lack of special positioning tool leads to poor operation consistency, which easily causes physical fatigue and increases the quality fluctuation caused by human factors;

[0005] 2. It is difficult to guarantee the positioning accuracy: during the steel ball removal process, the spot welding head of the electric core liquid injection port and the pull ball tool is not provided with a positioning guide mechanism, which leads to the inability to accurately control the relative position relationship between the two, resulting in deviation of the liquid injection port positioning. This deviation will directly affect the true circularity index of the subsequent hole expansion process, causing the electric core liquid injection port structure to be out of round, ultimately leading to the scrap of the electric core due to sealing failure, significantly increasing unnecessary production cost. INVENTION CONTENTS

[0006] To solve the problems in the background art, the utility model provides a lithium battery production repair pull ball device.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: a lithium battery production repair pull ball device, comprising a spot welding head, an electric core limiting box, a base and a support column; the upper end of the base is fixedly installed with the electric core limiting box and the support column, the electric core limiting box is limitingly installed with the electric core, the upper end of the support column is installed with the spot welding head, and the use end of the spot welding head is correspondingly arranged with the liquid injection hole of the electric core.

[0008] The upper end of the support column is fixedly connected with one end of a horizontally arranged positioning rod in a sleeving and limiting manner, and the other end of the positioning rod is insertedly installed with the spot welding head.

[0009] The upper end of each of the four inner side walls of the electric core limiting box is a wedge surface, and the lower end of the four inner side walls of the electric core limiting box encloses a placement space that is interference-limitedly inserted with the lower end of the electric core.

[0010] Each of the four inner side walls of the electric core limiting box is provided with a protective layer.

[0011] The number of the battery cell limiting boxes is multiple, and the lower end of the support column is slidably connected to the base.

[0012] The upper surface of the base is provided with a sliding groove, and the lower end of the support column is fixed with a slider, which is slidably connected to the sliding groove.

[0013] A limiting block is fixed to the outer side of the lower end of the support column. A hemispherical locking block is installed at the end of the limiting block adjacent to the cell limiting box. Each cell limiting box is provided with a locking groove at the end adjacent to the support column. The hemispherical locking block is interference-fitted with the corresponding locking groove.

[0014] Each of the battery cell limiting boxes has a connecting lug fixed to its outer wall. Multiple connecting lugs are coaxially arranged and fixedly connected by a shaft inserted inside them.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention achieves stable clamping and positioning of battery cells through a cell limiting box, replacing manual hand operation and effectively eliminating quality fluctuations caused by insufficient operational stability. The spot welding head limiting and positioning, combined with the interference fit between the hemispherical block and the slot, ensures precise alignment between the spot welding head and the battery cell's liquid injection port, fundamentally solving the problem of hole enlargement and out-of-roundness caused by alignment deviation. In addition, the collaborative design of multiple sets of sliding cell limiting boxes and support columns, along with the coaxial fixing structure of the connecting ears, enables synchronous positioning of multiple battery cells, significantly improving rework efficiency and reducing labor costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 yes Figure 1 The main view;

[0019] Figure 3 yes Figure 1 Side view;

[0020] Figure 4 yes Figure 1 Top view;

[0021] Figure 5 This is a schematic diagram showing the connection relationship between the battery cell and the battery cell limiting box. Detailed Implementation

[0022] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0023] A ball-removing device for rework in lithium battery production includes a spot welding head 2, a cell limiting box 5, a base 6, and a support column 8. The cell limiting box 5 and the support column 8 are fixedly installed on the upper end of the base 6. The cell limiting box 5 is interference-fitted to the base 6 or detachably fixed by screws. A cell 4 is limited and installed inside the cell limiting box 5. The spot welding head 2 is inserted and installed on the upper end of the support column 8. The working end of the spot welding head 2 is set to correspond to the position of the liquid injection hole 3 of the cell 4, i.e., the location of the steel ball.

[0024] The upper end of the support column 8 is fitted with one end of a horizontally positioned positioning rod 9 and fixedly connected by a set screw. The other end of the positioning rod 9 is inserted and fitted with a spot welding head 2. Specifically, one end of the positioning rod 9 is rotatably connected to the support column 8, and a positioning hole is opened on the outer wall of the upper end of the support column 8. A set screw is installed on the positioning rod 9. When the set screw is located in the positioning hole, the spot welding head 2 is positioned in the working position. When loading and unloading the battery cell 4, the spot welding head 2 is moved by rotating the positioning rod 9 to ensure the normal loading and unloading of the battery cell 4, avoiding repeated loading and unloading of the spot welding head 2 after installation, and extending the service life of the spot welding head 2. At the same time, even if the spot welding head 2 is rotated due to the loading and unloading of the battery cell 4, the working height of the spot welding head 2 will not change due to rotation, ensuring production accuracy. In addition, at least one more positioning rod 9 can be set for winding the soldering iron cable 1 to ensure a clean working environment.

[0025] The upper ends of the four inner sidewalls of the battery cell limiting box 5 are all wedge-shaped surfaces 13. The placement space 14 enclosed by the lower ends of the four inner sidewalls of the battery cell limiting box 5 is interference-fitted with the lower end of the battery cell 4. The upper wedge-shaped surfaces 13 leave space to facilitate the loading and unloading of the battery cell 4.

[0026] The four inner walls of the battery cell limiting box 5 are provided with protective layers. The protective layers are made of silicone, rubber, etc., to prevent damage to the battery cell 4 during insertion.

[0027] The number of battery cell limiting boxes 5 is multiple, and the lower end of the support column 8 is slidably connected to the base 6. This facilitates the simultaneous operation of multiple battery cells 4, making the production process simpler and more convenient, and improving production efficiency.

[0028] The upper surface of the base 6 is provided with a sliding groove 15 along the arrangement direction of the multiple battery cell limiting boxes 5, and the lower end of the support column 8 is fixed with a slider 7, which is slidably connected to the sliding groove 15.

[0029] A limiting block 16 is fixed to the outer side of the lower end of the support column 8. A hemispherical locking block is installed at the end of the limiting block 16 adjacent to the cell limiting box 5. Each cell limiting box 5 has a locking groove 11 at the end adjacent to the support column 8. The hemispherical locking block is interference-fitted with the corresponding locking groove 11. The interference fit between the hemispherical locking block and the corresponding locking groove 11 enables rapid positioning during cell switching operations.

[0030] Each of the battery cell limiting boxes 5 has a connecting lug 12 fixed to its outer wall. Multiple connecting lugs 12 are coaxially arranged and fixedly connected by a shaft inserted inside them. The multiple battery cell limiting boxes 5 are inserted and fixed by the shaft to ensure the stability between the multiple battery cell limiting boxes 5, and to ensure the accuracy of battery cell 4 positioning and operation.

[0031] When using this utility model, the battery cell 4 is inserted into the battery cell limiting box 5, and the spot welding head 2 is installed on the positioning rod 9. At this time, the spot welding head 2 is in contact with the steel ball. Then, the spot welding head 2 is energized through the soldering iron cable 1 to heat up the spot welding head 2. Subsequently, the steel ball melts and sticks to the spot welding head 2, thereby realizing the operation of removing the steel ball.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ball-removing device for rework in lithium battery production, characterized in that: It includes a spot welding head (2), a cell limiting box (5), a base (6), and a support column (8); the cell limiting box (5) and the support column (8) are fixedly installed on the upper end of the base (6), the cell limiting box (5) contains a cell (4), the upper end of the support column (8) is equipped with a spot welding head (2), and the working end of the spot welding head (2) is set to correspond to the liquid injection hole (3) of the cell (4).

2. The ball-removing device for rework in lithium battery production according to claim 1, characterized in that: The upper end of the support column (8) is fixedly connected to one end of the horizontally set positioning rod (9) with a positioning limit, and the other end of the positioning rod (9) is inserted and installed with a spot welding head (2).

3. The ball-removing device for rework in lithium battery production according to claim 1, characterized in that: The upper ends of the four inner sidewalls of the battery cell limiting box (5) are all wedge-shaped surfaces (13), and the placement space (14) enclosed by the lower ends of the four inner sidewalls of the battery cell limiting box (5) is interference-fitted to the lower end of the battery cell (4).

4. The ball-removing device for rework in lithium battery production according to claim 3, characterized in that: The four inner walls of the battery cell limiting box (5) are all provided with protective layers.

5. A ball-removing device for rework in lithium battery production according to claim 1 or 4, characterized in that: The number of the battery cell limiting boxes (5) is multiple, and the lower end of the support column (8) is slidably connected to the base (6).

6. A ball-removing device for rework in lithium battery production according to claim 5, characterized in that: The upper surface of the base (6) is provided with a sliding groove (15), and the lower end of the support column (8) is fixed with a slider (7), which is slidably connected to the sliding groove (15).

7. A ball-removing device for rework in lithium battery production according to claim 6, characterized in that: A limiting block (16) is fixed on the outer side of the lower end of the support column (8). A hemispherical locking block is installed on the end of the limiting block (16) adjacent to the cell limiting box (5). Each cell limiting box (5) is provided with a slot (11) on the end adjacent to the support column (8). The hemispherical locking block is interference-fitted with the corresponding slot (11).

8. A ball-removing device for rework in lithium battery production according to claim 7, characterized in that: Each of the battery cell limiting boxes (5) has a connecting ear (12) fixed on its outer wall. The multiple connecting ears (12) are coaxially arranged and fixedly connected by a shaft inserted inside them.

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