Polymer battery multi-tab winding electrode group packaging tab rectification mechanism

Abstract

This utility model belongs to the field of lithium-ion battery technology, specifically relating to a polymer battery multi-tab winding electrode assembly packaging electrode tab correction mechanism, comprising: a mounting plate for mounting the entire mechanism on a lower end cap base; a bracket connected to the mounting plate via a heat insulation plate; a sliding cylinder mounted on the bracket; a gripper cylinder mounted on the sliding table of the sliding cylinder via a transition plate; and a right gripper and a left gripper driven by the gripper cylinder; wherein, the sliding cylinder can drive the gripper cylinder and the right and left grippers to move back and forth as a whole, and the gripper cylinder can drive the right and left grippers to perform opening and closing movements. This patent, through the correction gripper mechanism driven by the sliding cylinder, achieves precise correction of the multi-tab electrode assembly's position in three dimensions (up, down, left, right, front, and back) before packaging, effectively avoiding problems such as exposed electrode adhesive and misalignment caused by the natural drooping of the electrodes.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a polymer battery multi-tab winding electrode assembly packaging electrode tab correction mechanism. Background Technology

[0002] During the manufacturing process of polymer batteries, the positive and negative tabs of the multi-tab wound electrode assembly often exhibit a Z-shaped, naturally drooping state after welding and bending. This natural drooping phenomenon leads to excessive exposure of the tab adhesive after the electrode assembly is placed into the casing during the subsequent double-sided encapsulation process, and the tab position becomes misaligned, seriously affecting the encapsulation quality and easily causing poor encapsulation, decreased battery performance, and even safety hazards.

[0003] Currently, existing double-sided packaging equipment generally lacks effective tab correction functions, making it impossible to effectively adjust the tab position before packaging. Therefore, problems such as inconsistent tab adhesive height and lateral tab misalignment after the electrode assembly is installed in the casing are difficult to avoid, hindering the improvement of automated production efficiency and product yield. Utility Model Content

[0004] The purpose of this invention is to provide a polymer battery multi-tab winding electrode group packaging electrode tab correction mechanism to solve the technical problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a polymer battery multi-tab winding electrode assembly encapsulation electrode tab correction mechanism, comprising: Mounting plate, used to mount the entire mechanism onto the lower head base; The bracket is connected to the mounting plate via a heat insulation plate; A slide cylinder is mounted on the bracket; A gripper cylinder is mounted on the slide of the slide cylinder via a transition plate; And, the right gripper and the left gripper driven by the gripper cylinder; The slide cylinder can drive the gripper cylinder and the right and left grippers to move back and forth as a whole, and the gripper cylinder can drive the right and left grippers to open and close.

[0006] Preferably, the mechanism is mounted on the lower sealing head base of the double-sided sealing device via the mounting plate and moves synchronously with the lower sealing head base.

[0007] Preferably, the right and left grippers, when closed, can jointly grip and correct the left and right positions of the electrode tabs.

[0008] Preferably, when the slide cylinder extends, it can push the tab rubber to a fixed position through the right and left grippers to correct the front and rear position of the tab and the height of the tab rubber.

[0009] Preferably, the right and left grippers have horizontal bearing surfaces for supporting the drooping electrode tabs from below when the mechanism rises, in order to correct the vertical position of the electrode tabs.

[0010] Preferably, the heat insulation plate is made of a high-temperature resistant material and is used to prevent the heat generated during the operation of the lower end cap from being transferred to the correction mechanism.

[0011] The beneficial effects of this utility model are as follows: This patent achieves precise correction of the position of the multi-tab electrode assembly in three dimensions (upper, lower, left, right, front, and rear) before packaging through a correction gripper mechanism driven by a slide cylinder. This effectively avoids problems such as exposed or skewed tab adhesive caused by the natural drooping of the tabs, ensuring the consistency of the tab adhesive height and the accuracy of the tab position, thereby significantly improving the yield and production efficiency of bilateral packaging of polymer batteries. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention. Detailed Implementation

[0013] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0014] like Figure 1 As shown, the present invention provides a polymer battery multi-tab winding electrode group packaging electrode tab correction mechanism, which mainly consists of a mounting plate 1, a heat insulation plate 2, a bracket 3, a slide cylinder 4, a transition plate 5, a gripper cylinder 6, a right gripper 7, and a left gripper 8.

[0015] The mounting plate 1 serves as the mounting base for the entire mechanism and is fixed to the lower sealing head base (not shown in the figure) of the double-sided sealing equipment by bolts or other fastening methods, thereby enabling the mechanism to rise and fall synchronously with the lower sealing head base.

[0016] The bracket 3 is bolted to the top of the heat insulation plate 2, and the heat insulation plate 2 is bolted to the mounting plate 1. The heat insulation plate 2 is made of glass fiber, polyimide or other high-temperature resistant materials, and its main function is to block the heat generated by the lower end cap during the hot-pressing process from being transferred to this correction mechanism, preventing precision components such as cylinders from failing or being damaged due to high temperature.

[0017] The slide cylinder 4 is vertically mounted on the bracket 3 by bolts, and its slide can reciprocate precisely in the vertical direction (i.e., the front-to-back direction shown in the attached figure). The transition plate 5 is mounted on the slide of the slide cylinder 4 by bolts. The gripper cylinder 6 is mounted on the transition plate 5 by bolts, so that it can move together with the slide of the slide cylinder 4. The right gripper 7 and the left gripper 8 are respectively mounted on the two driving fingers of the gripper cylinder 6 by screws or slots. The relative inner sides of the two grippers have flat gripping surfaces, and their tops have horizontal bearing planes.

[0018] The working process and principle of this utility model are as follows: Alignment of tabs (correction of vertical direction): After the wound electrode assembly is placed into the battery case, the lower end cap base drives the entire alignment mechanism to rise. During this process, the rising right gripper 7 and left gripper 8 use their top horizontal bearing surfaces to lift the naturally drooping, Z-shaped multi-tabs from below, leveling them to a predetermined position that is basically parallel to the electrode assembly body, thus completing the vertical alignment of the tabs.

[0019] Tab clamping (correcting left and right orientation): After leveling the tabs, the gripper cylinder 6 actuates, driving the right gripper 7 and left gripper 8 to move towards each other and close, clamping the tabs horizontally. This action corrects any possible left or right tilt of the tabs, placing them in the correct centered position along the width of the battery casing, thus completing the left and right orientation correction.

[0020] Tab positioning (correcting front-to-back orientation): Finally, the slide of the slide cylinder 4 extends forward, pushing the gripper cylinder 6, the closed right gripper 7, and the left gripper 8 forward together via the transition plate 5. The grippers push the entire tab bundle they hold forward, ensuring that the tab adhesive is pushed to a fixed and precise position, guaranteeing the consistency of the exposed height of the tab adhesive in all battery products, thereby completing the front-to-back orientation correction.

[0021] At this point, the deviations of the tabs in the vertical, horizontal, and front-back directions have all been corrected. Subsequently, the double-sided sealing equipment can perform normal packaging processes, greatly improving the packaging yield and consistency.

[0022] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A polymer battery multi-tab winding electrode group packaging tab rectification mechanism, characterized in that, include: Mounting plate (1) is used to mount the entire mechanism on the lower head base; The bracket (3) is connected to the mounting plate (1) via a heat insulation plate (2); The slide cylinder (4) is mounted on the bracket (3); The gripper cylinder (6) is mounted on the slide of the slide cylinder (4) via a transition plate (5); And, the right gripper (7) and the left gripper (8) driven by the gripper cylinder (6); The slide cylinder (4) can drive the gripper cylinder (6) and the right gripper (7) and left gripper (8) to move back and forth as a whole. The gripper cylinder (6) can drive the right gripper (7) and left gripper (8) to perform opening and closing movements.

2. The tab correction mechanism according to claim 1, characterized in that, The mechanism is mounted on the lower sealing head base of the double sealing device via the mounting plate (1) and moves synchronously with the lower sealing head base.

3. The tab correction mechanism according to claim 1 or 2, characterized in that, When closed, the right gripper (7) and the left gripper (8) can jointly clamp and correct the left and right positions of the tabs.

4. The tab correction mechanism according to claim 1 or 2, characterized by, When the slide cylinder (4) extends, it can push the tab rubber to a fixed position through the right gripper (7) and the left gripper (8) to correct the front and rear position of the tab and the height of the tab rubber.

5. The tab correction mechanism according to claim 1 or 2, characterized by, The right gripper (7) and left gripper (8) have horizontal bearing surfaces, which are used to support the drooping pole tabs from below when the mechanism rises, so as to correct the vertical position of the pole tabs.

6. The tab correction mechanism of claim 1, wherein, The heat insulation plate (2) is made of high temperature resistant material and is used to block the heat generated by the lower end cap during operation from being transmitted to the correction mechanism.

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