A tab folding device for lead storage batteries

Abstract

This invention provides a tab bending device for lead-acid batteries, including a fixed support. In use, the fixed support is installed on one side of a conveyor belt for transporting electrode groups. The conveyor belt has clamps spaced apart for holding the electrode groups. The tab bending device further includes: a finger cylinder with two clamping fingers, each clamping finger having a fork structure. Multiple fingers extend from each fork structure, with the fingers on the two forks corresponding one-to-one. Each pair of fingers has a pressing block on opposite sides of its end for squeezing the tab; and a slide cylinder, mounted on the fixed support, for driving the finger cylinder to move towards the conveyor belt, thereby extending each pair of fingers to the corresponding electrode group. This invention can bend the tabs of multiple electrode groups at once, reducing labor intensity and improving work efficiency. It also provides good consistency in bending angles, which is beneficial for welding quality, while ensuring that the tabs do not experience adhesive creep inside the battery, thus preventing quality problems.

Description

Technical Field

[0001] This utility model relates to the technical field of lead-acid battery production equipment, specifically to a tab bending device for lead-acid batteries. Background Technology

[0002] Lead-acid batteries consist of plates, separators, electrolyte, and battery case. The plates are the core component of a lead-acid battery. The chemical reactions for charging and discharging the battery mainly rely on the active materials on the plates and the electrolyte. The plates are divided into positive plates and negative plates, both of which consist of grids and active materials coated on the grids.

[0003] Currently, to maximize volumetric energy density, batteries use direct-connection adhesive-impregnated busbars between cells, which improves internal layout and space utilization. However, this requires bending the negative electrode tabs; otherwise, their tight contact with the battery's bottom wall can cause adhesive siphoning, leading to adhesive creeping up the tabs and onto the plates, resulting in battery performance issues. Properly bending the tabs to maintain a safe distance from adjacent cells reduces the risk of short circuits and ensures battery safety.

[0004] The utility model with authorization announcement number CN208722977U discloses a pinching tab device, including a bracket, a pinching tab mechanism, and a lifting cylinder fixed on the bracket to drive the pinching tab mechanism to rise and fall. The pinching tab mechanism includes a pair of pressure strips that press the electrode group from both sides, and a pair of extrusion blocks that push the negative electrode tabs on both sides of the electrode group from the outside to the inside. The pressure strips and extrusion blocks are driven to move horizontally by the cylinder.

[0005] In this prior art, only one lead-acid battery can be pinched at a time, and the pinching distance between a pair of squeezing blocks is determined by the two clamping fingers of the finger cylinder, which makes it less suitable for lead-acid batteries with different electrode thicknesses. Utility Model Content

[0006] To address the aforementioned technical problems in the existing technology, this utility model provides a tab bending device for lead-acid batteries, which can bend the tabs of multiple electrode groups at once, thereby improving work efficiency.

[0007] This utility model provides a tab bending device for lead-acid batteries, including a fixed support. In use, the fixed support is installed on one side of a conveyor belt for transporting electrode groups. The conveyor belt is provided with clamps at intervals for holding the electrode groups. The tab bending device further includes:

[0008] The finger cylinder includes two clamping fingers, each clamping finger is provided with a fork structure, and multiple fingers extend from each fork structure. The fingers on the two fork structures correspond one-to-one, and each pair of fingers has a pressure block for squeezing the tab on the opposite side of its end.

[0009] A slide cylinder, mounted on the fixed support, is used to drive the finger cylinder to move toward the conveyor belt, thereby extending each pair of fingers to the corresponding pole group.

[0010] Furthermore, each fork structure has 2-5 protruding fingers, which can bend the tabs of 2-5 pole groups at once.

[0011] Furthermore, one end of each shift fork structure is fixed to a finger clamp of the finger cylinder by a bolt.

[0012] Furthermore, the side of the pressure block used to compress the tab is an inclined surface, and the inclination angle of the inclined surface is adapted to the angle after the tab is bent.

[0013] Furthermore, at least one of the pressure blocks in each pair of fingers can adjust the spacing between the two pressure blocks in opposite directions.

[0014] Furthermore, the end of the shift finger is provided with a mounting groove for mounting the pressure block. The mounting groove is opened in the opposite direction of a pair of pressure blocks to allow the pressure blocks to extend out. The pressure block is provided with a threaded adjusting rod passing through the side wall of the mounting groove on the opposite side. The side wall of the mounting groove has a threaded hole that mates with the threaded adjusting rod.

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

[0016] This invention can bend the tabs of multiple electrode groups at once, reducing labor intensity and improving work efficiency; the bending angle is consistent, which is beneficial to welding quality, and at the same time ensures that there are no quality problems caused by adhesive creep on the tabs inside the battery. Attached Figure Description

[0017] Figure 1 This is a top view of the tab bending device for lead-acid batteries of this utility model when the tabs are clamped.

[0018] Figure 2 This is a top view of the tab bending device for lead-acid batteries according to this utility model.

[0019] Figure 3 This is a left-side view of the structure of the lead-acid battery tab bending device of this utility model when the tab is clamped.

[0020] Figure 4 This is a schematic diagram of the electrode bending device for lead-acid batteries of this utility model when bending the electrode tabs. The fixed support, the cylinder part of the finger cylinder and the slide cylinder are not shown in the figure.

[0021] Figure label:

[0022] Fixed support 1, clamp 11, finger cylinder 2, finger clamp 21, shift fork structure 22, shift finger 23, pressure block 24, threaded adjustment rod 25, slide cylinder 3. Detailed Implementation

[0023] like Figures 1-4 As shown, a lead-acid battery tab bending device includes a fixed support 1, a finger cylinder 2, and a slide cylinder 3.

[0024] The finger cylinder 2 includes two finger clamps 21, each finger clamp 21 is provided with a fork structure 22, and one end of each fork structure 22 is fixed to one finger clamp 21 of the finger cylinder 2 by bolts.

[0025] Each fork structure 22 has multiple fingers 23 extending out. In a preferred embodiment, each fork structure 22 has 2-5 fingers 23 extending out, which can bend the tabs of 2-5 pole groups at once.

[0026] The two shift fork structures 22 have corresponding shift fingers 23, and each pair of shift fingers 23 has a pressure block 24 on the opposite side of its end for pressing the electrode tab. At least one of the pressure blocks 24 in each pair of shift fingers 23 can be adjusted in the opposite direction to adjust the distance between the two pressure blocks 24. By reducing the distance between the pressure blocks 24, the electrode tab is pressed, causing it to bend. Different distances between the pressure blocks 24 result in different degrees of bending of the electrode tab. The side of the pressure block 24 used for pressing the electrode tab is a slope, and the inclination angle of the slope is adapted to the angle after the electrode tab is bent.

[0027] The end of the finger 23 is provided with a mounting groove for mounting the pressure block 24. The mounting groove is opened in the opposite direction of a pair of pressure blocks 24 to allow the pressure blocks 24 to extend. The pressure block 24 is provided with a threaded adjusting rod 25 passing through the side wall of the mounting groove on the opposite side. The side wall of the mounting groove has a threaded hole that mates with the threaded adjusting rod 25.

[0028] The slide cylinder 3 is mounted on the fixed support 1 and is used to drive the finger cylinder 2 to move toward the conveyor belt so that each pair of fingers 23 extends to the corresponding pole group.

[0029] In use, the fixed support 1 is installed on one side of the conveyor belt used to transport the electrode groups. Clamps 11 for holding the electrode groups are spaced apart on the conveyor belt, and the electrode groups are arranged at equal intervals. When the electrode groups reach the position corresponding to the lead-acid battery tab bending device, the device detects the electrode groups, and the conveyor belt stops moving. At this time, the sliding cylinder pushes the finger cylinder 2 towards the conveyor belt, causing each pair of fingers 23 to extend to the corresponding electrode group. Then, the finger cylinder 2 drives the two fork structures 22 to move relative to each other. The pressure blocks 24 on the fork structures 22 press against the negative tabs on both sides of the electrode group, bending the tabs. Then, the fork structures 22 return to their original position, entering the next cycle.

Claims

1. A tab crimping device for lead storage batteries, comprising a fixed support which, in use, is mounted on the side of a conveyor belt for conveying a group of poles, said conveyor belt being provided with clamps at intervals for clamping the group of poles, characterized in that, The electrode bending device further includes: The finger cylinder includes two clamping fingers, each clamping finger is provided with a fork structure, and multiple fingers extend from each fork structure. The fingers on the two fork structures correspond one-to-one, and each pair of fingers has a pressure block for squeezing the tab on the opposite side of its end. A slide cylinder, mounted on the fixed support, is used to drive the finger cylinder to move toward the conveyor belt, thereby extending each pair of fingers to the corresponding pole group.

2. The tab crimping apparatus for lead storage batteries according to claim 1, wherein Each shifter fork has 2-5 fingers extending out.

3. The tab crimping apparatus for lead storage batteries according to claim 1, wherein One end of each shift fork structure is fixed to a finger clamp of the finger cylinder by a bolt.

4. The tab crimping apparatus for lead storage batteries according to claim 1, wherein The side of the pressure block used to compress the tab is inclined, and the inclination angle of the inclined surface is adapted to the angle after the tab is bent.

5. The tab crimping apparatus for lead storage batteries according to claim 1, wherein At least one of the pressure blocks in each pair of finger levers can adjust the spacing between the two pressure blocks in opposite directions.

6. The tab crimping apparatus for lead storage batteries according to claim 5, wherein The end of the finger is provided with a mounting groove for mounting the pressure block. The mounting groove is opened in the opposite direction of a pair of pressure blocks to allow the pressure blocks to extend out. The pressure block is provided with a threaded adjusting rod passing through the side wall of the mounting groove on the opposite side. The side wall of the mounting groove has a threaded hole that mates with the threaded adjusting rod.

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