Tab correction mechanism for lithium battery top side sealing machine

Abstract

The utility model relates to the field of lithium battery top side sealing machines, in particular to a tab correcting mechanism for a lithium battery top side sealing machine, which is characterized in that an upper sealing head and a lower sealing head are respectively connected with a rack through a pressing cylinder and a jacking cylinder, the upper sealing head and the lower sealing head are aligned in the vertical direction, and the pressing cylinder and the jacking cylinder can drive the upper sealing head and the lower sealing head to close a mold; a lower sealing seat is arranged between the lower sealing head and the jacking air cylinder, a positioning assembly used for correcting the position of the tab is arranged on the side wall of the lower sealing seat and comprises a clamping jaw air cylinder, a left clamping arm and a right clamping arm, the clamping jaw air cylinder is connected with the lower sealing seat through a supporting plate, and the clamping jaw air cylinder is perpendicular to the side wall of the lower sealing head; the left clamping arm and the right clamping arm are installed on two movable arms of the clamping jaw air cylinder respectively, the clamping jaw air cylinder can drive the left clamping arm and the right clamping arm to be opened and closed, an avoiding groove is formed in the side wall of the lower sealing head, the left clamping arm and the right clamping arm extend into the avoiding groove, and the left clamping arm and the right clamping arm can be clamped before mold closing of the upper sealing head and the lower sealing head. And the positions of the two tabs are actively and accurately corrected.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery top-side sealing machines, and in particular to a tab correction mechanism for lithium battery top-side sealing machines. Background Technology

[0002] Soft-pack lithium batteries are widely used in consumer electronics, power batteries, and energy storage due to their high energy density, good safety, and flexible design. One of the key processes in their production is sealing the top and side of the aluminum-plastic film packaging bag to form a sealed cell cavity and bring out the positive and negative electrode tabs. A top-side sealing machine is a specialized piece of equipment for this process, typically consisting of an upper sealing head, a lower sealing head, and a cylinder that drives the mold closing. During mold closing, the heat sealing head fuses the PP layer of the aluminum-plastic film under specific temperature, pressure, and time conditions, achieving a seal.

[0003] In actual production, especially on high-speed or high-rate production lines, the two tabs of a battery cell are prone to positional deviations when positioned or transferred to the sealing station. This can manifest as simultaneous inward or outward shifts, tilting or even flipping of one or both tabs, or the entire tab shifting out of its intended position. These tab misalignments can lead to a series of serious consequences during mold closing and sealing. At best, they can cause poor sealing at the tabs, increasing the risk of electrolyte leakage; at worst, they can damage or break the tabs, or even damage the heat-sealing head or lower sealing head, affecting battery yield and long-term reliability. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a tab correction mechanism for a lithium battery top-side sealing machine, which can effectively solve the technical problem that the tab is prone to misalignment during sealing.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] The tab correction mechanism for a lithium battery top-side sealing machine includes a frame, an upper sealing head, and a lower sealing head. The upper and lower sealing heads are connected to the frame via a pressing cylinder and a lifting cylinder, respectively. The upper and lower sealing heads are vertically aligned. The pressing and lifting cylinders can drive the upper and lower sealing heads to close the mold. A lower sealing seat is provided between the lower sealing head and the lifting cylinder. The side wall of the lower sealing seat is provided with a positioning component for correcting the tab position. The positioning component includes a gripper cylinder, a left gripping arm, and a right gripping arm. The gripper cylinder is connected to the lower sealing seat via a support plate and is perpendicular to the side wall of the lower sealing head. The left and right gripping arms are respectively installed on the two movable arms of the gripper cylinder. The gripper cylinder can drive the left and right gripping arms to open and close. The side wall of the lower sealing head is provided with a clearance groove, into which the left and right gripping arms extend.

[0007] Furthermore, two right clamping blocks are mounted on the surface of the left clamping arm, and two left clamping blocks are mounted on the surface of the right clamping arm, with the two right clamping blocks corresponding to the two left clamping blocks respectively.

[0008] Furthermore, the surfaces of the left and right clamping arms are provided with sliding grooves, and the right clamping block and the left clamping block are respectively installed into the sliding grooves of the left and right clamping arms by bolts.

[0009] Furthermore, the frame is equipped with a sliding sleeve, and both the upper end cap and the lower end cap are equipped with guide posts. The guide posts pass through the sliding sleeve, and the axes of the guide posts and the sliding sleeve are parallel to the extension and retraction directions of the pressing cylinder and the lifting cylinder.

[0010] Furthermore, the frame is composed of a bottom plate and a top plate. The top plate is installed parallel to the bottom plate by support columns. The upper end cap and the lower end cap are located between the bottom plate and the top plate. The upper end cap is installed to the end of the top plate near the bottom plate by a downward pressing cylinder, and the lower end cap is installed to the end of the bottom plate near the top plate by a lifting cylinder.

[0011] Furthermore, shock-absorbing rubber heads are provided at opposite ends of the bottom plate and the top plate.

[0012] Compared with existing technologies, the beneficial effects of this invention are as follows: By using a positioning component installed on the side wall of the lower sealing seat, the position of the two electrode ears can be precisely corrected actively before the upper and lower sealing heads are closed. The gripper cylinder drives the left and right gripping arms to open and close, directly acting on the appropriate position at or near the root of the electrode ear, forcibly clamping, correcting, and positioning the tilted or misaligned electrode ear to the preset ideal position. By effectively correcting electrode ear misalignment, problems such as poor sealing, electrode ear damage, and sealing head damage caused by improper electrode ear positioning are fundamentally avoided. This significantly improves the sealing reliability, product appearance consistency, and overall production yield of the top and side sealing process. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention;

[0014] Figure 2 This is a three-dimensional schematic diagram of the positioning component in this utility model;

[0015] Figure 3 This is an exploded view of the positioning component in this utility model;

[0016] Figure 4 This is a schematic diagram of the positioning component and the lower end cap in this utility model;

[0017] Figure 5 This is a schematic diagram of the present invention installed on a lithium battery top-side sealing machine;

[0018] Figure 6This is a schematic diagram showing the docking of the present invention with the workbench of a lithium battery top-side sealing machine;

[0019] The following labels are used in the diagram: 1-Frame, 2-Upper end cap, 3-Lower end cap, 301-Allowing groove, 4-Pressing cylinder, 5-Lifting cylinder, 6-Lower end cap, 7-Positioning assembly, 701-Gripper cylinder, 702-Left gripping arm, 703-Right gripping arm, 704-Right gripping block, 705-Left gripping block, 706-Slide groove, 8-Guide column, 9-Slide sleeve, 10-Shock-absorbing rubber head, 11-Worktable. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The following is combined with Figures 1-6 The present invention provides a detailed description of the tab correction mechanism for a lithium battery top-side sealing machine:

[0022] The tab correction mechanism for a lithium battery top-side sealing machine is mounted on the frame 1 of the lithium battery top-side sealing machine and docks with the worktable 11 of the lithium battery top-side sealing machine. It includes an upper sealing head 2 and a lower sealing head 3, which are connected to the frame 1 via a pressing cylinder 4 and a lifting cylinder 5, respectively. The upper sealing head 2 and lower sealing head 3 are vertically aligned. The pressing cylinder 4 and the lifting cylinder 5 can drive the upper sealing head 2 and lower sealing head 3 to close the mold. A lower sealing seat 6 is provided between the lower sealing head 3 and the lifting cylinder 5. The side wall of the lower sealing seat 6 is provided with positioning features for correcting the tab position. Component 7, the positioning component 7 includes a gripper cylinder 701, a left gripping arm 702 and a right gripping arm 703. The gripper cylinder 701 is connected to the lower sealing seat 6 through a support plate. The gripper cylinder 701 is perpendicular to the side wall of the lower sealing head 3. The left gripping arm 702 and the right gripping arm 703 are respectively installed on the two movable arms of the gripper cylinder 701. The gripper cylinder 701 can drive the left gripping arm 702 and the right gripping arm 703 to open and close. The side wall of the lower sealing head 3 is provided with a clearance groove 301. The left gripping arm 702 and the right gripping arm 703 extend into the clearance groove 301.

[0023] Two right clamping blocks 704 are mounted on the surface of the left clamping arm 702, and two left clamping blocks 705 are mounted on the surface of the right clamping arm 703. The two right clamping blocks 704 correspond to the two left clamping blocks 705, achieving independent and precise clamping and positioning of the two tabs. This ensures that each tab can be accurately corrected by its corresponding clamping block, avoiding the problem of poor correction effect or damage to tabs with different offset states caused by a single clamping structure. Simultaneously, the clamping blocks increase the contact area with the tabs, dispersing the clamping force and reducing the risk of the tabs being pinched or deformed during correction. Both the left clamping arm 702 and the right clamping arm 703 have sliding grooves 706 on their surfaces. The right clamping blocks 704 and left clamping blocks 705 are bolted into the sliding grooves 706 of the left and right clamping arms 702 and 703, respectively, allowing the installation position of the clamping blocks to be flexibly adjusted according to the tab spacing of different battery cell models. This design greatly enhances the versatility and adaptability of the equipment. There is no need to replace the entire clamping arm or positioning assembly 7. Simply loosen the bolts, slide the clamping block to the desired position and retighten it to quickly switch to producing battery cells of different specifications. This significantly reduces changeover time and cost and improves the flexibility of the production line.

[0024] By using the positioning component 7 located on the side wall of the lower sealing seat 6, the positions of the two electrode ears can be precisely corrected actively before the upper sealing head 2 and the lower sealing head 3 are closed. The gripper cylinder 701 drives the left and right gripping arms 703 to open and close, directly acting on the appropriate position at or near the root of the electrode ear, forcibly clamping, correcting, and positioning any "inward-pointing," "outward-pointing," tilted, or otherwise offset electrode ears to the preset ideal position. By effectively correcting electrode ear misalignment, problems such as poor sealing, electrode ear damage, and sealing head damage caused by improper electrode ear positioning are fundamentally avoided. This significantly improves the sealing reliability of the top and side sealing process, product appearance consistency, and overall production yield.

[0025] The frame 1 is equipped with a sliding sleeve 9, and both the upper end cap 2 and the lower end cap 6 are equipped with guide posts 8. The guide posts 8 pass through the sliding sleeve 9, and the axes of the guide posts 8 and the sliding sleeve 9 are parallel to the extension and retraction directions of the lower pressure cylinder 4 and the lifting cylinder 5. This provides precise linear guidance for the up and down movement of the upper end cap 2 and the lower end cap 6, effectively preventing the upper and lower end caps 3 from tilting or shaking during the mold closing process, and ensuring that the two are always precisely aligned.

[0026] The frame 1 consists of a base plate and a top plate. The top plate is mounted parallel to the base plate via support columns. An upper end cap 2 and a lower end cap 3 are located between the base plate and the top plate. The upper end cap 2 is mounted to the end of the top plate near the base plate via a downward pressing cylinder 4, and the lower end cap 3 is mounted to the end of the base plate near the top plate via a lifting cylinder 5. Both the base plate and the top plate have shock-absorbing rubber heads 10 at their opposite ends. When the upper end cap 2 descends to the bottom or the lower end cap 3 ascends to the top, the shock-absorbing rubber heads 10 effectively absorb the impact force generated between the cylinder piston rod end and the frame 1, avoiding rigid collisions and significantly reducing the risk of damage to the cylinder itself, connecting parts, guide columns 8, sliding sleeves 9, and the frame 1, thus extending the equipment's service life. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary 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 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.

Claims

1. A tab correction mechanism for a lithium battery top-side sealing machine, comprising a frame, an upper sealing head, and a lower sealing head, wherein the upper and lower sealing heads are connected to the frame via a pressing cylinder and a lifting cylinder, respectively, the upper and lower sealing heads are vertically aligned, and the pressing cylinder and the lifting cylinder can drive the upper and lower sealing heads to close the mold, characterized in that: A lower sealing seat is provided between the lower end cap and the lifting cylinder. The side wall of the lower sealing seat is provided with a positioning component for correcting the position of the electrode tab. The positioning component includes a gripper cylinder, a left gripper arm, and a right gripper arm. The gripper cylinder is connected to the lower sealing seat through a support plate and is perpendicular to the side wall of the lower end cap. The left gripper arm and the right gripper arm are respectively installed on the two movable arms of the gripper cylinder. The gripper cylinder can drive the left gripper arm and the right gripper arm to open and close. The side wall of the lower end cap is provided with a clearance groove, and the left gripper arm and the right gripper arm extend into the clearance groove.

2. The tab correction mechanism for a lithium battery top-side sealing machine according to claim 1, characterized in that: Two right clamping blocks are mounted on the surface of the left clamping arm, and two left clamping blocks are mounted on the surface of the right clamping arm, with the two right clamping blocks corresponding to the two left clamping blocks respectively.

3. The tab correction mechanism for a lithium battery top-side sealing machine according to claim 2, characterized in that: The surfaces of the left and right clamping arms are provided with sliding grooves, and the right clamping block and the left clamping block are respectively installed into the sliding grooves of the left and right clamping arms by bolts.

4. The tab correction mechanism for a lithium battery top-side sealing machine according to any one of claims 1-3, characterized in that: The frame is equipped with a sliding sleeve, and both the upper end cap and the lower end cap are equipped with guide posts. The guide posts pass through the sliding sleeve, and the axes of the guide posts and the sliding sleeve are parallel to the extension and retraction directions of the pressing cylinder and the lifting cylinder.

5. The tab correction mechanism for a lithium battery top-side sealing machine according to any one of claims 1-3, characterized in that: The frame consists of a base plate and a top plate. The top plate is installed parallel to the base plate via support columns. The upper end cap and the lower end cap are located between the base plate and the top plate. The upper end cap is installed to the end of the top plate near the base plate via a downward pressing cylinder, and the lower end cap is installed to the end of the base plate near the top plate via a lifting cylinder.

6. The tab correction mechanism for a lithium battery top-side sealing machine according to claim 5, characterized in that: Both the bottom plate and the top plate are equipped with shock-absorbing rubber heads at opposite ends.

Images