Battery cell tab bending and winding device

By designing a cell tab bending and winding device, the tabs are folded simultaneously during the winding process using the bending inclined surface and limiting components, which solves the problem of low efficiency after winding multi-tab cells and achieves a highly efficient tab folding effect.

CN223514002UActive Publication Date: 2025-11-04DONGGUAN ZEYUAN MACHINE
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Patent Information

Application Number
CN202422811436.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-18
Publication Date
2025-11-04
Estimated Expiration
2034-11-18

AI Technical Summary

Technical Problem

Multi-tab cells are inefficient when the tabs are pressed after winding, and it is difficult to succeed on the first try, and they are prone to rebound.

Method used

A battery cell tab bending and winding device was designed, including two sets of bending components and a control device. The tabs are folded synchronously during the winding process by bending the inclined surface. The tabs are moved backward synchronously by the limiting component and the bidirectional lead screw to ensure the folding effect.

Benefits of technology

This technology enables the simultaneous folding of tabs in multi-tab cells during the winding process, improving efficiency, preventing tab rebound, and simplifying the process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a battery cell tab bending and winding device in the technical field of battery cell tab bending. The bending assembly comprises a pole folding helix wheel, the pole folding helix wheel is provided with a bending inclined surface, the control device controls the pole folding helix wheel to be in contact with the root part of a pole lug of the multi-pole-lug battery cell while the multi-pole-lug battery cell is wound, and the pole lug of the multi-pole-lug battery cell is folded under the limit of the bending inclined surface. Therefore, winding and folding of the tabs of the multi-tab battery cell are realized at the same time. A multi-tab battery cell is folded in the winding process, during tab folding and when two tab folding wheels make contact with a positive tab and a negative tab, the tabs are folded through the inclined faces of the frustums, along with winding, the diameter of the multi-tab battery cell is increased, a bidirectional lead screw is matched with a first mounting plate to control a moving table to retreat, and then a limiting rod is driven to retreat; and the two electrode lug folding wheels synchronously retreat, so that electrode lug folding operation is facilitated.
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Description

Technical Field

[0001] This utility model relates to the field of battery cell tab bending technology, and in particular to a battery cell tab bending and winding device. Background Technology

[0002] A typical battery cell structure includes a positive electrode, a negative electrode, and a separator between the positive and negative electrodes. The positive electrode, separator, and negative electrode are stacked in sequence and then wound to form a battery cell. The positive electrode has a positive tab, and the negative electrode has a negative tab.

[0003] For multi-tab battery cells, the tabs are usually pressed after winding to complete the folding of the tabs. However, pressing the tabs after winding not only increases the number of steps and reduces efficiency, but also makes it difficult to successfully fold multi-tab cells in one go, as they are prone to rebound. Utility Model Content

[0004] To address the problems of low efficiency and difficulty in folding the tabs of multi-tab cells mentioned in the background art, this utility model provides the following technical solution:

[0005] A battery cell tab bending and winding device is used to bend the tabs of a multi-tab battery cell. The battery cell tab bending and winding device includes a bending device and a control device, which is used to control the movement of the bending device.

[0006] The bending device includes two sets of bending components, which are used to bend the positive and negative tabs of the multi-tab battery cell, respectively.

[0007] The bending assembly includes a folding tuft, which has a bending inclined surface. While the multi-tab battery cell is being wound, the control device controls the folding tuft to contact the root of the tab of the multi-tab battery cell. The tab of the multi-tab battery cell is folded under the limitation of the bending inclined surface, thereby realizing the simultaneous winding and folding of the tab of the multi-tab battery cell.

[0008] Furthermore, a limiting component one for supporting the folding truss is installed in the middle of the folding truss, a limiting component two for limiting the folding truss is installed in the middle of the limiting component one, and an unlocking component for disassembling the limiting component two in cooperation with the limiting component one is installed in the middle of the limiting component one.

[0009] Furthermore, the bending device includes a moving table, the moving table including a limiting rod for limiting the limiting component, one end of the limiting rod being equipped with a second mounting plate and an adjusting rod for limiting the limiting rod, and a first mounting plate being installed in the middle of the moving table.

[0010] Furthermore, the control device includes a fixed platform, with a guide rail for guiding the moving platform mounted on the upper end of the fixed platform. A bidirectional lead screw for cooperating with the first mounting plate to control the moving platform to move back and forth is mounted on the upper end of the fixed platform. A driven pulley is mounted on one end of the bidirectional lead screw, a belt is sleeved in the middle of the driven pulley, a driving pulley is mounted on one end of the belt, and a motor is mounted on one end of the driving pulley.

[0011] Furthermore, the first limiting component includes a limiting tube, one end of which is equipped with a limiting disc for limiting the folding trunnion, one end of which is equipped with a plurality of arc-shaped plates for limiting the folding trunnion, one end of which is equipped with a stop block for limiting the second limiting component, and one end of which is equipped with a limiting groove on both the inner and outer walls of one end of the arc plate, the plurality of stop blocks forming a hole a, and the plurality of limiting grooves forming a cavity a.

[0012] Furthermore, the second limiting component includes a second limiting plate for limiting a pair of folding trunnions in conjunction with the limiting plate. A connecting block is installed at one end of the second limiting plate, and a locking block is installed at one end of the connecting block.

[0013] Furthermore, the unlocking component includes a long rod, one end of which is equipped with a limiting disc three, and the other end of which is equipped with a semi-circular block for controlling the deformation of the arc plate. A bolt two for limiting the semi-circular block is installed in the middle of the semi-circular block, and a handle for pulling the semi-circular block is installed at one end of the limiting disc three.

[0014] Furthermore, a winding shaft is installed in the middle of the multi-pole battery cell.

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

[0016] During the winding process, the multi-tab battery cell undergoes tab folding. When the tabs are folded, the inclined surface of the truncated cone folds the tabs when the two tab folding wheels contact the positive and negative tabs. As the winding progresses, the diameter of the multi-tab battery cell increases. The bidirectional lead screw, in conjunction with the first mounting plate, controls the moving stage to move backward, which in turn drives the limit rod to move backward, so that the two tab folding wheels move backward synchronously to facilitate the tab folding operation. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the top structure of the bending device of this utility model;

[0019] Figure 3 This is a schematic diagram of the bottom structure of the bending device of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the limiting component of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the limiting component two of this utility model;

[0022] Figure 6 This is a schematic diagram of the unlocking component of this utility model;

[0023] Figure 7 This is a schematic diagram of the control device of this utility model.

[0024] The following is a list of component names represented by the various reference numerals in the attached figures:

[0025] 10 - Multi-tab battery cell, 11 - Tab, 20 - Reel;

[0026] 001 - Bending device;

[0027] 100 - Bending assembly, 110 - Bending trunnion;

[0028] 120-Limit component one, 121-Limit tube, 122-Limit disc one, 123-Arc plate, 124-Stop block, 125-Limit groove;

[0029] 130-Limit component two, 131-Limit disk two, 132-Connecting block, 133-Card block;

[0030] 140 - Unlocking component, 141 - Long rod, 142 - Limiting plate three, 143 - Handle, 144 - Semicircular block, 145 - Bolt two;

[0031] 200-Moving platform, 210-First mounting plate, 220-Second mounting plate, 221-Positioning rod, 230-Adjusting rod, 240-Limiting rod, 241-Fixing block, 242-One bolt;

[0032] 002 - Control device;

[0033] 300-Fixed platform, 310-Guide rail, 320-Dual-direction screw, 321-Passive pulley, 322-Belt, 323-Driving pulley, 324-Motor. Detailed Implementation

[0034] The preferred embodiments of this utility model are described in detail below, and a clear and complete explanation is given in conjunction with the accompanying drawings.

[0035] Please see Figures 1-7This utility model provides a battery cell tab bending and winding device for bending the tabs 11 of a multi-tab battery cell 10. The battery cell tab bending and winding device includes a bending device 001 and a control device 002, which is used to control the bending device 001 to move.

[0036] The bending device 001 includes two sets of bending components 100, which are used to bend the positive and negative electrodes of the multi-tab battery cell 10, respectively.

[0037] The bending assembly 100 includes a folding tuft 110, which has a bending inclined surface. While the multi-tab battery cell 10 is being wound, the control device 002 controls the folding tuft 110 to contact the root of the tab of the multi-tab battery cell 10. The tabs 11 of the multi-tab battery cell 10 are folded under the limit of the bending inclined surface, thereby realizing the simultaneous winding and folding of the tabs of the multi-tab battery cell 10.

[0038] The bending device 001 includes two bending components 100. Each bending component 100 includes a bending trunnion 110 for easy bending. A limiting component 120 for supporting the bending trunnion 110 is installed in the middle of the bending trunnion 110. A limiting component 2 130 for limiting the bending trunnion 110 is installed in the middle of the limiting component 120. An unlocking component 140 for disassembling the limiting component 2 130 in conjunction with the limiting component 120 is installed in the middle of the limiting component 120.

[0039] The bending device 001 includes a moving table 200, which includes two limiting rods 240 for limiting the limiting component 120. The limiting component 120 is movably mounted on one end of the limiting rod 240, and the other end of the limiting rod 240 is equipped with a second mounting plate 220 and an adjusting rod 230 for limiting the limiting rod 240. The end of the limiting rod 240 near the adjusting rod 230 is a U-shaped block for engaging with the adjusting rod 230. A positioning rod 221 is mounted in the middle of the second mounting plate 220, and one end of the limiting rod 240 is machined with a cavity for cooperating with the positioning rod 221 to limit the limiting rod 240, so that the limiting rod 240 can slide left and right under the guidance of the positioning rod 221, so as to adjust the distance between the two limiting rods 240.

[0040] A fixing block 241 is fixedly installed at one end of the limiting rod 240, and a bolt 242 is installed in the middle of the fixing block 241. After the position of the limiting rod 240 is adjusted, the bolt 242 is rotated so that one end of the bolt 242 abuts against the positioning rod 221, thereby locking the limiting rod 240.

[0041] A first mounting plate 210 is installed in the middle of the moving stage 200. The first mounting plate 210 is fixed in the middle by bolts. The adjusting rod 230 is fixed on the second mounting plate 220 by bolts. The second mounting plate 220 is fixedly welded to the rear end of the moving stage 200.

[0042] Limiting component 120 includes a limiting tube 121. A limiting disc 122 for limiting the folding trunnion 110 is fixedly installed at one end of the limiting tube 121. Multiple arc-shaped plates 123 for limiting the folding trunnion 110 are fixedly installed at one end of the limiting disc 122. The multiple arc-shaped plates 123 form a cylinder. The folding trunnion 110 is sleeved on the outside of the arc-shaped plates 123. A stop block 124 for limiting the limiting component 130 is fixedly installed at the end of the arc-shaped plates 123 away from the limiting disc 122. Limiting grooves 125 are machined on both the inner and outer walls of one end of the arc-shaped plates 123. The limiting grooves 125 facilitate deformation at one end of the arc-shaped plates 123, allowing for the installation and removal of the limiting component 130. The multiple stop blocks 124 form a hole a, and the multiple limiting grooves 125 form a chamber a.

[0043] The second limiting component 130 includes a second limiting disk 131 for limiting the pole-folding trunnion 110 in conjunction with the first limiting disk 122. The first limiting disk 122 and the second limiting disk 131 are located at opposite ends of the pole-folding trunnion 110, respectively, for limiting the pole-folding trunnion 110. A connecting block 132 is fixedly installed at one end of the second limiting disk 131, and a locking block 133 is fixedly installed at one end of the connecting block 132. One end of the locking block 133 is an arc-shaped end, and the other end is a flat end. When the pole-folding trunnion 110 is sleeved on the outside of multiple arc-shaped plates 123, the arc-shaped surface of the locking block 133 enters the chamber a through the hole a, and the flat end of the locking block 133 is blocked by the stop block 124, preventing the locking block 133 from disengaging from the chamber a, thereby locking the second limiting disk 131.

[0044] The unlocking assembly 140 includes a long rod 141, which is located in the middle hole of the limiting tube 121. One end of the long rod 141 is fixedly mounted with a limiting disc 142, and the other end of the long rod 141 is mounted with a semi-circular block 144 for controlling the deformation of the arc plate 123, and the semi-circular block 144 is located in chamber a. A bolt 145 for limiting the semi-circular block 144 is installed in the middle of the semi-circular block 144. A threaded hole is machined at the end of the long rod 141 near the semi-circular block 144 so that the bolt 145 can fix the semi-circular block 144 to the long rod 141. A handle 143 for pulling the semi-circular block 144 is fixedly mounted at one end of the limiting disc 142.

[0045] When the folding trunnion 110 needs to be disassembled due to wear, the handle 143 is pulled, and the long rod 141 drives the semi-circular block 144 away from the locking block 133. Through the compression of the semi-circular block 144 on the chamber a, the end of the machined limiting groove 125 undergoes elastic deformation, and the multiple stops 124 move away from each other, causing the hole a to be enlarged, thereby allowing the limiting component 2 130 to be disassembled and then the limiting component 2 130 to be disassembled and replaced.

[0046] A control device 002 for controlling the forward and backward movement of the bending device 001 is installed at the lower end of the bending device 001. The control device 002 includes a fixed platform 300, a guide rail 310 for guiding the moving platform 200 is installed at the upper end of the fixed platform 300, and a bidirectional lead screw 320 for cooperating with the first mounting plate 210 to control the forward and backward movement of the moving platform 200 is installed at the upper end of the fixed platform 300. The first mounting plate 210 is a lead screw nut. By rotating the bidirectional lead screw 320, the first mounting plate 210 is positioned on the rod of the bidirectional lead screw 320. The body moves back and forth, synchronously driving the moving table 200 to move back and forth. A passive pulley 321 is fixedly installed at one end of the bidirectional lead screw 320. A belt 322 is sleeved in the middle of the passive pulley 321. A driving pulley 323 is installed at one end of the belt 322. A motor 324 is installed at one end of the driving pulley 323. The rotation of the driving pulley 323 is controlled by the motor 324. Under the drive of the belt 322, the passive pulley 321 drives the bidirectional lead screw 320 to rotate, so as to control the moving table 200 to move back and forth.

[0047] One end of the folding trunnion 110 is connected to a multi-tab battery cell 10, and both ends of the multi-tab battery cell 10 are equipped with tabs 11. The folding trunnion 110 is frustoconical in shape and has a hole machined in the middle to facilitate fitting onto the arc-shaped plate 123. When the folding trunnion 110 contacts the tabs 11, the inclined surface of the frustum folds the tabs 11. As winding proceeds, the diameter of the multi-tab battery cell 10 increases. Guided by the bidirectional lead screw 320, the moving stage 200 gradually moves away from the multi-tab battery cell 10. A take-up shaft 20 is installed in the middle of the multi-tab battery cell 10. The take-up shaft 20 is connected to the existing winding equipment, causing the multi-tab battery cell 10 to rotate and wind up the tabs.

[0048] Based on the above description and accompanying drawings, those skilled in the art can understand and implement this utility model. Furthermore, any non-creative modifications made to this utility model by those skilled in the art without inventive effort are still within the protection scope of this utility model.

Claims

1. A battery cell tab bending and winding device for bending the tabs (11) of a multi-tab battery cell (10), the battery cell tab bending and winding device comprising a bending device (001), characterized in that: It also includes a control device (002) for controlling the movement of the bending device (001); The bending device (001) includes two sets of bending components (100), which are used to bend the positive and negative electrodes of the multi-tab battery cell (10), respectively. The bending assembly (100) includes a folding tuft (110), which has a bending inclined surface. While the multi-tab battery cell (10) is being wound, the control device (002) controls the folding tuft (110) to contact the root of the tab of the multi-tab battery cell (10). The tabs (11) of the multi-tab battery cell (10) are folded under the limit of the bending inclined surface, thereby realizing the simultaneous winding and folding of the tabs of the multi-tab battery cell (10).

2. The battery cell tab bending and winding device according to claim 1, characterized in that: A limiting component one (120) for supporting the folding truss (110) is installed in the middle of the folding truss (110). A limiting component two (130) for limiting the folding truss (110) is installed in the middle of the limiting component one (120). An unlocking component (140) for disassembling the limiting component two (130) in cooperation with the limiting component one (120) is installed in the middle of the limiting component one (120).

3. The battery cell tab bending and winding device according to claim 1, characterized in that: The bending device (001) includes a moving platform (200), the moving platform (200) includes a limiting rod (240) for limiting the limiting component (120), one end of the limiting rod (240) is equipped with a second mounting plate (220) and an adjusting rod (230) for limiting the limiting rod (240), and a first mounting plate (210) is installed in the middle of the moving platform (200).

4. The battery cell tab bending and winding device according to claim 1, characterized in that: The control device (002) includes a fixed platform (300), the upper end of which is equipped with a guide rail (310) for guiding the moving platform (200). The upper end of the fixed platform (300) is equipped with a bidirectional lead screw (320) for cooperating with the first mounting plate (210) to control the moving platform (200) to move back and forth. One end of the bidirectional lead screw (320) is equipped with a passive pulley (321), a belt (322) is sleeved in the middle of the passive pulley (321), a driving pulley (323) is installed at one end of the belt (322), and a motor (324) is installed at one end of the driving pulley (323).

5. The battery cell tab bending and winding device according to claim 2, characterized in that: The first limiting component (120) includes a limiting tube (121). One end of the limiting tube (121) is equipped with a limiting disc (122) for limiting the folding trunnion (110). One end of the limiting disc (122) is equipped with a plurality of arc-shaped plates (123) for limiting the folding trunnion (110). One end of the arc-shaped plate (123) is equipped with a stop block (124) for limiting the second limiting component (130). The inner and outer walls of one end of the arc-shaped plate (123) are both machined with limiting grooves (125). The plurality of stop blocks (124) form a hole a, and the plurality of limiting grooves (125) form a cavity a.

6. The battery cell tab bending and winding device according to claim 2, characterized in that: The second limiting component (130) includes a second limiting disk (131) for limiting the pole trunnion (110) in conjunction with the first limiting disk (122). A connecting block (132) is installed at one end of the second limiting disk (131), and a locking block (133) is installed at one end of the connecting block (132).

7. The battery cell tab bending and winding device according to claim 2, characterized in that: The unlocking assembly (140) includes a long rod (141), one end of which is fitted with a limiting disc three (142), and the other end of which is fitted with a semi-circular block (144) for controlling the deformation of the arc plate (123). A bolt two (145) for limiting the semi-circular block (144) is fitted in the middle of the semi-circular block (144), and a handle (143) for pulling the semi-circular block (144) is fitted at one end of the limiting disc three (142).

8. The battery cell tab bending and winding device according to claim 1, characterized in that: A winding shaft (20) is installed in the middle of the multi-pole battery cell (10).