Battery cell Mylar film packaging and welding integrated device and using method thereof

Abstract

The invention relates to the field of battery cell production, in particular to a battery cell Mylar film packaging and welding integrated device, which comprises a shell, a battery cell module, a battery cell module and a battery cell module, an upper pressing plate; the left side and the right side of the upper pressing plate are respectively provided with the adjusting limiting blocks, the adjusting limiting blocks are movably connected with the upper pressing plate, and the adjusting limiting blocks are connected with the shell through hasp structures and can drive the upper pressing plate to press downwards so as to extrude the battery cell top cover; the adjusting bolt penetrates through the adjusting limiting block and extends into a screw hole in the upper pressing plate, and the adjusting bolt is rotated to drive the adjusting limiting block to move in the vertical direction, so that the pressing height of the upper pressing plate on the battery cell top cover is adjusted; the side pressing plates are arranged on the front side and the rear side of the shell and are in positioning connection with the shell through positioning pins and magnetic components; and a film pressing opening is formed in the side pressing plate. And an adhesive opening is formed in the side wall of the shell. The precision and consistency can be improved, the welding quality is improved, the safety is enhanced, the production efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] This invention relates to the field of battery cell production, and more specifically, to a battery cell Mylar film packaging welding integration device and its usage method. Background Technology

[0002] 1. Current state of technology In the lithium battery production process, after the tabs of the battery cell are welded, a layer of polyester film (usually called Mylar film) needs to be wrapped on its surface to achieve insulation protection and prevent short circuits. Subsequently, the seams and edges of the Mylar film need to be firmly bonded to the top cover of the battery cell through methods such as hot melt welding to ensure its long-term stability and safety.

[0003] Currently, for automated production lines, sophisticated fully automated equipment (such as the publicly available documents CN105870490A and CN118560775A) already completes this process. However, in R&D, prototype manufacturing, or small-batch non-standard production scenarios, due to low output and diverse product models, introducing large-scale automated equipment is costly and impractical. Therefore, manual operation is commonly used for the packaging and welding of Mylar films.

[0004] 2. The core pain points of existing technologies Traditional manual operations suffer from a series of critical problems that seriously affect product quality, efficiency, and safety: Question 1: Inaccurate positioning and misalignment of Mylar film Phenomenon: When operators manually apply high-temperature tape to fix the Mylar film, the Mylar film shifts position during the application process due to hand tremors and uneven force.

[0005] Causes and consequences: The lack of an effective physical positioning mechanism makes it impossible to guarantee the consistency of each operation, which directly affects the appearance quality and insulation reliability of the final product.

[0006] Question 2: There is a gap between the top cover and the Mylar film, which affects the welding effect. Phenomenon: There may be tabs or support tape under the top cover of the battery cell, which will cause a gap between the top cover plane and the Mylar film.

[0007] Causes and consequences: Manually pressing to eliminate this gap is laborious, unstable, and difficult to control the force. If the gap is not eliminated, direct welding will result in: Welding leak / welding burn-through: The heat from the welding head cannot be effectively conducted to the bonding surface, resulting in localized overheating and burning through the Mylar membrane.

[0008] Welding wire drawing: When the welding head is lifted, the molten Mylar film is stuck together and drawn into thin wires, which affects the appearance and may cause short circuit risk in subsequent processes (such as top cover welding).

[0009] Problem 3: Lateral gaps cannot be eliminated, resulting in poor welding stability. Phenomenon: Gaps may exist between the front and rear edges of the Mylar membrane and the top cover.

[0010] Causes and consequences: Manually applying even pressure from the side using tools cannot result in poor contact during welding and insufficient weld strength.

[0011] Question 4: Low production efficiency, high work intensity, and high safety hazards. Phenomenon: The entire process relies on the precise operation of skilled workers and is time-consuming.

[0012] Causes and consequences: The repetitive labor is intense and inefficient, and the unstable state of holding a hot soldering iron increases the risk of burns and other safety hazards. Summary of the Invention

[0013] The purpose of this invention is to provide a Mylar film packaging welding integration device for battery cells, which can solve at least one technical problem existing in the prior art to a certain extent.

[0014] The technical solution of this invention is implemented as follows: A battery cell Mylar film packaging welding integration device, comprising: A housing for holding the battery cell, wherein the housing is provided with a battery cell slot adapted to the shape of the battery cell; The upper pressure plate is located above the housing; Adjustable limiting blocks are respectively provided on the left and right sides of the upper pressure plate, and the adjustable limiting blocks are movably connected to the upper pressure plate. The adjustable limiting blocks are connected to the housing through a buckle structure and can drive the upper pressure plate to press down to squeeze the top cover of the battery cell. An adjusting bolt passes through the adjusting limit block and extends into a screw hole on the upper pressure plate. By rotating the adjusting bolt, the adjusting limit block is moved vertically, thereby adjusting the pressing height of the upper pressure plate on the top cover of the battery cell. Side pressure plates are provided on the front and rear sides of the housing and are positioned and connected to the housing by positioning pins and magnetic components; The side plate is provided with a pressing port for pressing the Mylar film tightly against the surface of the cell top cover before welding; the side wall of the housing is provided with an adhesive port for operators to apply high-temperature tape to the Mylar film seams from the outside.

[0015] Furthermore, the adjusting limit block is fixedly connected to the upper pressure plate by a movable bolt. When the movable bolt is loosened, the adjusting limit block is allowed to move freely relative to the upper pressure plate. After adjustment, it is tightened again to lock the position.

[0016] Furthermore, the adjusting limit block has an L-shaped structure, including a fitting part and a connecting part; The upper pressure plate has fitting grooves at its left and right ends on its top surface that match the fitting part. The fitting part is inserted into the fitting groove by an interference fit. The fitting part has at least two first bolt holes for installing the movable bolt. The upper pressure plate has at least two second bolt holes, which correspond one-to-one with the first bolt holes. The fitting part also has an adjustment through hole for installing the adjustment bolt. The upper pressure plate also has a third bolt hole corresponding to the adjustment through hole. The side of the connecting part and the side of the housing are provided with the buckle structure.

[0017] Furthermore, the top of the housing has protruding positioning portions at both the left and right ends; The bottom of the upper pressure plate has two pole grooves corresponding to the positive and negative poles of the battery cell in the middle. The left and right ends of the bottom of the upper pressure plate have positioning grooves that match the positioning part, so as to position the upper pressure plate on the top of the housing.

[0018] Furthermore, the outer side of the side pressure plate is provided with multiple welding ports that avoid welding tools. The welding port avoidance area corresponds to the welding position of the Mylar film, which facilitates the insertion of a soldering iron for local hot melt welding.

[0019] Furthermore, the housing is provided with a positioning pin and a circular magnet, and the side pressure plate is provided with a positioning pin hole that fits with the positioning pin and a magnetic area that attracts the circular magnet, so as to realize the rapid positioning and initial fixation of the side pressure plate.

[0020] Furthermore, the lower parts of the front and rear sides of the upper pressure plate are respectively provided with clearance grooves to form a detachable channel, allowing the side pressure plate to be removed horizontally by means of fingers or tools through the clearance grooves.

[0021] Compared with the prior art, the beneficial effects of the present invention are: In this solution, the cell slots inside the casing are matched with the cells to achieve coarse positioning of the cells. Then, a top pressure plate and adjustable limit block achieve precise clamping in the Z-axis (front-back direction). A side pressure plate and magnetic pin positioning achieve clamping and welding avoidance in the X / Y-axis (left-right direction). An external adhesive port facilitates adhesive bonding. This series of steps constructs a complete, closed-loop solution that addresses the pain points of manual operation. The technical effects of this solution are direct and significant. 1. Improved precision and consistency: Through mechanical positioning (cell slots, positioning pins, magnetic blocks) and adjustable clamping, human error is completely eliminated, ensuring consistent welding quality for each Mylar film packaged cell; 2. Improved welding quality: Completely eliminates vertical and lateral gaps, allowing the Mylar membrane to be heated evenly, fundamentally eliminating "weld leakage", "weld burn-through" and "weld stringing" phenomena, resulting in stronger welds and a more aesthetically pleasing appearance; 3. Enhanced safety: It replaces dangerous manual extrusion and unstable soldering, keeping operators away from the high-temperature soldering iron work area and significantly reducing safety risks; 4. Improved production efficiency: Modular design allows for simple and quick installation and disassembly (hook and latch, magnetic attraction), reducing preparation and adjustment time and shortening the processing cycle of a single battery cell.

[0022] 5. Reduce labor intensity: The tedious manual pressing action is automated, making the operation easier and less strenuous.

[0023] 6. Excellent versatility: By adjusting the bolts, it can be adapted to different sizes of battery cells and different thicknesses of tape, meeting the needs of small-batch, multi-variety production; 7. Reduced costs: The structure is simple and easy to manufacture. Compared with automated equipment, the cost is extremely low, making it particularly suitable for the research and development and pilot production stages. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an isometric view of the Mylar film packaging welding integration device for battery cells of the present invention; Figure 2 This is another schematic diagram of the Mylar film packaging welding integration device for battery cells of the present invention; Figure 3 This is a schematic diagram of the present invention with the upper pressure plate concealed; Figure 4 This is a schematic diagram of the structure of the adjusting limit block at the left end of the upper pressure plate of the present invention; Figure 5 This is a schematic diagram of the bottom structure of the upper pressure plate of the present invention; Figure 6 This is a schematic diagram of the structure of the adjusting limit block of the present invention with a buckle; Figure 7 This is a schematic diagram of the structure of the battery cell placed in the battery cell slot according to the present invention.

[0026] In the picture: 1-Upper pressure plate; 2-Adjusting limit block; 201-Matching part; 202-Connecting part; 3-Snap fastener; 4-Adjusting through hole; 5-Snap fastener base; 6-Glue port; 7-Side pressure plate; 8-Welding port; 9-Housing; 901-Cell slot; 10-Positioning pin; 11-Circular magnet; 12-Positioning pin hole; 13-Pressure film opening; 14-Allowing groove; 151-First bolt hole; 152-Second bolt hole; 153-Third bolt hole; 16-Pole post groove; 17-Positioning groove; 18-Modible bolt; 19-Ear plate; 20-Bolt; 21-Snap ring; 22-Connector; 23-Adjusting bolt; 24-Cell. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] This solution provides an integrated welding device for 24-film packaging of battery cells, including: The housing 9 is used to carry the battery cell 24, and the housing 9 is provided with a battery cell slot 901 adapted to the shape of the battery cell 24; Upper pressure plate 1 is located above the housing 9; Adjustable limiting block 2, the adjustable limiting block 2 is respectively provided on the left and right sides of the upper pressure plate 1, and the adjustable limiting block 2 is movably connected to the upper pressure plate 1. The adjustable limiting block 2 is connected to the housing 9 through the buckle 3 structure, and can drive the upper pressure plate 1 to press down to squeeze the top cover of the battery cell 24. The adjusting bolt 23 passes through the adjusting limit block 2 and extends into the screw hole on the upper pressure plate 1. By rotating the adjusting bolt 23, the adjusting limit block 2 is moved vertically, thereby adjusting the pressing height of the upper pressure plate 1 on the top cover of the battery cell 24. Side pressure plates 7 are disposed on the front and rear sides of the housing 9, and are positioned and connected to the housing 9 by positioning pins 10 and magnetic components; The side pressure plate 7 is provided with a film pressing port 13 for pressing the Mylar film tightly against the top cover surface of the battery cell 24 before welding; the side wall of the housing 9 is provided with an adhesive port 6 for operators to apply high-temperature tape to the Mylar film seams from the outside. The adjusting limit block 2 is fixedly connected to the upper pressure plate 1 by a movable bolt 18. Loosening the movable bolt 18 allows the adjusting limit block 2 to move freely relative to the upper pressure plate 1. After adjustment, it is tightened again to lock the position.

[0035] The adjusting limit block 2 has an L-shaped structure, including a fitting part 201 and a connecting part 202. The upper pressure plate 1 has fitting grooves at its left and right ends that match the fitting part 201. The fitting part 201 is inserted into the fitting groove by interference fit. The fitting part 201 has at least two first bolt holes 151 for installing the movable bolt 18. The upper pressure plate 1 has at least two second bolt holes 152, which correspond one-to-one with the first bolt holes 151. The fitting part 201 also has an adjusting through hole 4 for installing the adjusting bolt 23. The upper pressure plate 1 also has a third bolt hole 153 corresponding to the adjusting through hole 4. The bottom of the connecting part 202 is lower than the bottom of the fitting part 201. The side of the connecting part 202 and the side of the housing 9 are provided with the buckle 3 structure.

[0036] The clasp 3 structure is a conventional technology, such as Figure 1 and Figure 6 As shown, here is a brief explanation: The latch 3 structure includes a latch 3, a latch base 5, an ear plate 19, and a latch ring 21. The ear plate 19 is fixed to the side of the connecting part 202 by two bolts 20. Hinged holes for mounting the latch ring 21 are provided on both sides of the latch 3. The latch ring 21 is snapped onto the latch 3 by its own metal resilience and can rotate. The connecting piece 22 is a hinge shaft. The latch 3 is hinged to the ear plate 19 through the connecting piece 22. The latch base 5 is provided on the left and right side walls of the housing 9. When the upper pressure plate 1 is fastened to the housing 9, the connection between the housing 9, the upper pressure plate 1, and the battery cell 24 is achieved through the fastening of the latch 3 structure on both sides of the housing 9.

[0037] The top of the housing 9 has raised positioning portions at both the left and right ends; the bottom of the upper pressure plate 1 has two electrode grooves 16 corresponding to the positive and negative electrodes of the battery cell 24 in the middle, and the bottom of the upper pressure plate 1 has positioning grooves at both the left and right ends that match the positioning portions, so as to position the upper pressure plate 1 on the top of the housing 9. The outer side of the side pressure plate 7 has multiple welding ports 8 that avoid welding tools. The areas of the welding ports 8 that avoid the welding tools correspond to the welding positions of the Mylar film, which facilitates the insertion of a soldering iron for local hot melt welding.

[0038] The housing 9 is provided with a positioning pin 10 and a circular magnet 11. The side pressure plate 7 is provided with a positioning pin hole 12 that fits with the positioning pin 10 and a magnetic region that attracts the circular magnet 11, so as to realize the rapid positioning and initial fixation of the side pressure plate 7.

[0039] The lower parts of the front and rear sides of the upper pressure plate 1 are respectively provided with relief grooves 14 to form a detachable channel, allowing the side pressure plate 7 to be removed horizontally by means of fingers or tools through the relief grooves 14.

[0040] Example 1 Please see Figures 1 to 7 This invention provides an integrated welding device for 24-cell battery film packaging, applicable to the wrapping, positioning, pressing, and auxiliary welding operations of 24-cell battery insulation film. Through the synergistic effect of its mechanical structure, this device solves problems such as inaccurate positioning, uneven pressing, poor welding quality, and high safety hazards inherent in manual operations.

[0041] like Figures 1 to 5 As shown, the device mainly consists of a housing 9, an upper pressure plate 1, an adjusting limit block 2, a side pressure plate 7, and a series of connecting, adjusting, and positioning components.

[0042] 1. Structure and function of shell 9 The shell 9 is the basic load-bearing component of the entire device. Its main body is a cuboid frame structure with a certain rigidity and strength. It is preferably made of metal materials (such as aluminum alloy or stainless steel) to ensure structural stability and durability.

[0043] Inside the central region of the housing 9, a cell slot 901 is provided that matches the shape of the cell 24 to be processed. The size and shape of the cell slot 901 are precisely designed according to the contour of the specific model of cell 24 to accommodate and initially position the cell 24 wrapped with Mylar film, ensuring that the cell 24 is horizontal and not easily shaken when placed in the tooling.

[0044] On the upper part of the front and rear sides of the housing 9, a positioning pin 10 and a circular magnet 11 are respectively provided. The positioning pin 10 is a cylindrical protrusion used to make clearance fit with the positioning pin hole 12 on the side pressure plate 7 to achieve precise lateral positioning. The circular magnet 11 is fixed to the housing 9 by means of adhesive or other methods, with its magnetic poles facing upwards, and is used to generate an attraction force with the mating magnetic area (such as an iron sheet or another magnet) on the side pressure plate 7 to achieve quick and initial fixation of the side pressure plate 7.

[0045] At least one adhesive port 6 is provided on each of the left and right side walls of the housing 9. In this embodiment, two adhesive ports 6 are provided on each side, one at the top and one at the bottom. The adhesive port 6 is a rectangular or circular opening that penetrates the side wall and connects to the cell slot 901. Its position corresponds to the operating area at the Mylar membrane seam. This design allows the operator to apply high-temperature tape to the Mylar membrane seam by inserting their fingers or special tools (such as tweezers) through the adhesive port 6 from the outside when the device is fully assembled, thus achieving unobstructed operation of critical processes.

[0046] 2. Structure and function of the upper pressure plate 1 and the adjustable limit mechanism The upper pressure plate 1 is a long strip-shaped plate component located directly above the housing 9, used to apply vertical downward pressure to the top cover of the battery cell 24.

[0047] At the lower left and right ends of the upper pressure plate 1, there is an L-shaped adjusting limit block 2. The horizontal fitting part 201 of each adjusting limit block 2 is inserted into the fitting groove at the end of the upper pressure plate 1 by interference fit, and the adjusting limit block 2 is detachably fixed to the upper pressure plate 1 by at least two M8 movable bolts 18 passing through the first bolt hole 151 and the second bolt hole 152. When the height needs to be adjusted, the movable bolts 18 are loosened, and the adjusting limit block 2 can move freely in the vertical plane relative to the upper pressure plate 1; after adjustment, the movable bolts 18 are tightened to lock its position.

[0048] An adjustment through hole 4 is provided at the center of the vertical connecting part 202 of the adjusting limit block 2. A nutless adjusting bolt 23 (preferably a 13mm hexagon socket head cap screw 20) passes through this adjustment through hole 4 and extends into the corresponding third bolt hole 153 on the upper pressure plate 1. By rotating the adjusting bolt 23, the adjusting limit block 2 can be driven to rise or fall vertically using the thread transmission principle, thereby accurately setting the initial installation height of the adjusting limit block 2.

[0049] In the central area at the bottom of the upper pressure plate 1, there are two pole post grooves 16, whose positions correspond to the positive and negative pole posts of the battery cell 24, which are used to avoid and protect the pole posts during the pressing process. At the left and right ends of the bottom of the upper pressure plate 1, there are two positioning grooves 17, whose shapes match the protruding positioning parts at the left and right ends of the top of the housing 9, which are used to achieve precise alignment and installation between the upper pressure plate 1 and the housing 9.

[0050] An ear plate 19 is fixedly connected to the outer side of the adjusting limit block 2 by an M8 bolt 20. The ear plate 19 is hinged to the latch 3 by a connector 22, forming a lever mechanism. The latch seat 5 is fixed to the side wall of the housing 9. When it is necessary to lock the upper pressure plate 1, the buckle 21 (using its own metal elasticity) is snapped onto the latch seat 5, and the connector 22 is pulled, thereby driving the latch 3 to move, forcing the upper pressure plate 1 to press down on the top cover of the battery cell 24.

[0051] 3. Structure and function of side pressure plate 7 The side pressure plate 7 is a pair of symmetrically arranged plate-shaped components, which are respectively installed on the front and rear sides of the housing 9.

[0052] On the inner side of each side pressure plate 7, there is a positioning pin hole 12 that matches the positioning pin 10 on the housing 9, and a mating magnetic area (such as a piece of iron) that attracts the circular magnet 11 on the housing 9. The precise positioning of the side pressure plate 7 is achieved through the mechanical cooperation between the positioning pin 10 and the positioning pin hole 12; the initial fixation of the side pressure plate 7 is achieved quickly and conveniently through the attraction force between the magnets, which facilitates one-handed operation and installation.

[0053] The side pressure plate 7 is designed with pressing ports 13, which can be used to press the Mylar film tightly against the top cover during operation. Each side pressure plate 7 has three welding ports 8 on its outer surface, located at the left and right ends and in the middle. These welding ports 8 are carefully designed to avoid the critical areas where the Mylar film needs to be heat-fused. This allows the operator to use the soldering tip of a soldering iron to directly insert through the welding ports 8 to locally heat and weld the edge of the Mylar film pressed by the pressing ports 13, without disassembling the side pressure plate 7.

[0054] For ease of maintenance and replacement, the lower front and rear sides of the upper pressure plate 1 are respectively provided with clearance grooves 14, forming a horizontal channel. When it is necessary to remove the side pressure plate 7, the locking of the upper pressure plate 1 can be released first, and then the side pressure plate 7 can be pulled out horizontally with fingers or tools through the clearance grooves 14.

[0055] 4. How to use the device The specific usage process of the device of the present invention is as follows: S1: Preparation and Placement: Place the housing 9 stably on a horizontal workbench. Remove the upper pressure plate 1 and the side pressure plates 7 on both sides. Place the battery cell 24, which has been wrapped with Mylar film, horizontally into the battery cell slot 901 of the housing 9, ensuring that its bottom is in contact with the cell and there is no tilt.

[0056] S2: Initial adjustment: Rotate the adjusting bolt 23 counterclockwise to the highest point so that its end is disengaged from the third bolt hole 153 inside the housing 9, and place the adjusting limit block 2 in the lowest position to avoid damaging the battery cell 24 during initial installation.

[0057] S3: Installation and initial pressing: Place the upper pressure plate 1 above the housing 9, and use the terminal groove 16 to fit the terminal of the battery cell 24. The positioning groove 17 cooperates with the protruding positioning part of the housing 9 to achieve precise positioning. Then, pull the latch 3 to insert the buckle 21 into the buckle seat 5, so that the upper pressure plate 1 initially presses down on the top cover of the battery cell 24.

[0058] S4: Precision Adjustment: Observe the fit between the top cover of cell 24 and the Mylar film. If there is a gap between the top and bottom or Mylar film overflow, loosen the movable bolt 18 and rotate the adjusting bolt 23 clockwise or counterclockwise to drive the adjusting limit block 2 to rise or fall, thereby fine-tuning the clamping amount of the upper pressure plate 1. Repeat this process until the top cover and Mylar film are completely and tightly fitted, without obvious gaps or excessive compression. Finally, tighten the movable bolt 18 to lock the position of the adjusting limit block 2.

[0059] S5: Install the side pressure plates 7: Align the two side pressure plates 7 with the positioning pins 10 and the circular magnets 11 at the front and rear of the housing 9, respectively, insert them, and use magnetic force to initially fix them. At this time, the pressing holes 13 on the side pressure plates 7 will automatically press the front and rear edges of the Mylar membrane together.

[0060] S6: Apply positioning adhesive: The operator uses their fingers or tools to precisely apply the high-temperature tape to the seam of the Mylar membrane through the adhesive port 6 on the side wall of the housing 9 to complete the physical fixation.

[0061] S7: Perform welding. Using a soldering iron, insert it into the welding port 8 on the outside of the side pressure plate 7 and perform local heat fusion welding on the welding position of the Mylar film to firmly fuse it to the top cover of the cell 24.

[0062] S8: Disassembly and Removal: After welding is completed, open the latch 3 to release the lock of the upper pressure plate 1 and remove the upper pressure plate 1. Then, slide the side pressure plates 7 horizontally out through the clearance groove 14 of the upper pressure plate 1. Finally, remove the finished battery cell 24 with completed Mylar film packaging welding from the housing 9.

[0063] In summary, through the above specific implementation methods, this solution successfully realizes a simple, convenient, safe and reliable 24-film packaging welding integrated device for battery cells, which significantly improves the process quality and efficiency in small-batch production.

[0064] This solution, combining existing Mylar film packaging welding processes, effectively addresses a series of problems encountered during Mylar film packaging welding, such as tape misalignment, operational inconvenience, weld leaks, weld burn-through, and post-weld stringing, as well as the impact of the gap between the top cover and the film on welding results. The designed cell groove positions the cell, securing it to the Mylar film during tape application for stability and to prevent misalignment. The newly added side and top pressure plates eliminate the gap between the top cover and the Mylar film, significantly reducing the risks associated with traditional manual pressing to eliminate this gap. Furthermore, adjusting the depth of the adjusting bolts changes the compaction distance of the top cover. This design flexibly adapts to various cell types, particularly those with different gaps between the top cover and the cell. In practical applications, for cells of different specifications, operators can precisely adjust the bolt depth according to specific gap requirements, ensuring a tight fit between the top cover and the cell for optimal welding results. This adjustable design enhances the product's versatility and adaptability, meeting diverse production needs. Meanwhile, the structure of this solution is easy to assemble, which reduces the workload, greatly improves work efficiency, reduces the dangers in the welding process, and effectively ensures the safety of operators.

[0065] Example 2 The method of using the battery cell 24 film packaging welding integration device includes the following steps: S1: Place the battery cell 24 wrapped with Mylar film into the battery cell slot 901 of the housing 9, and press the battery cell 24 to ensure that the bottom of the battery cell 24 is tightly attached to the bottom of the battery cell slot 901; S2: Adjust the height of the adjusting bolt 23 so that the adjusting limit block 2 is in the initial low position to avoid assembly damage; S3: Install the upper pressure plate 1, and use the pole post groove 16 and positioning groove 17 to achieve the positioning and installation of the upper pressure plate 1, the battery cell 24 and the housing 9. Then connect it to the housing 9 through the buckle 3 structure, so that the upper pressure plate 1 presses down on the top cover of the battery cell 24. S4: Observe the bonding status between the top cover of the battery cell 24 and the Mylar film. If there is a gap or overflow, loosen the movable bolt 18, rotate the adjusting bolt 23 to raise and lower the adjusting limit block 2, and adjust the pressing amount of the upper pressure plate 1 until they are tightly bonded. S5: Install the side pressure plate 7 on both sides of the housing 9 using the positioning pin 10 and magnetic components, and press the front and rear edges of the Mylar film using the pressing port 13; S6: Apply high-temperature adhesive tape to the seam of the Mylar membrane through adhesive port 6 for positioning and adhesive bonding; S7: Use a soldering iron to heat-weld the Mylar film through the soldering port 8 to firmly connect it to the top cover of the battery cell 24; S8: After welding is completed, release the buckle 3 structure, remove the upper pressure plate 1 and the side pressure plate 7, and take out the finished battery cell 24.

[0066] The beneficial effects of the technical solution of the present invention are: This device constructs a complete, closed-loop solution through a series of steps: "coarse positioning of the housing 9 → precision clamping in the Z-axis (front-back direction) by the upper pressure plate 1 and adjustable limit block → clamping and welding avoidance in the X / Y-axis (left-right direction) by the side pressure plate 7 and magnetic pin positioning → auxiliary adhesive application by the external adhesive port 6." This perfectly solves the pain points of manual operation, and the technical effects brought by this solution are direct and significant. 1. Improved precision and consistency: Through mechanical positioning (cell slot 901, positioning pin 10, magnetic block) and adjustable clamping, human operation errors are completely eliminated, ensuring consistent welding quality for each cell's 24-film packaging.

[0067] 2. Improved welding quality: Completely eliminates vertical and lateral gaps, allowing Mylar membranes to be heated evenly, fundamentally preventing "welding leaks," "welding through," and "welding stringing," resulting in stronger welds and a more aesthetically pleasing appearance.

[0068] 3. Enhanced safety: It replaces dangerous manual extrusion and unstable soldering, and keeps operators away from the work area of ​​the high-temperature soldering iron, greatly reducing safety risks.

[0069] 4. Improved production efficiency: Modular design, simple and quick installation and disassembly (hook and clip, magnetic attraction), reducing preparation and adjustment time and shortening the processing cycle of a single cell.

[0070] 5. Reduce labor intensity: The tedious manual pressing action is automated, making the operation easier and less strenuous.

[0071] 6. Excellent versatility: By adjusting bolt 23, it can be adapted to battery cells 24 of different sizes and tapes of different thicknesses to meet the production needs of small batches and multiple varieties.

[0072] 7. Reduced costs: The structure is simple and easy to manufacture. Compared with automated equipment, the cost is extremely low, making it particularly suitable for the research and development and pilot production stages.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrical cell Mylar film package welding integration apparatus, characterized by, The utility model relates to a kind of battery pressing device, including: Shell (9) for carrying electric core (24), the shell (9) is equipped with electric core groove (901) adapting electric core (24) appearance inside; Upper pressing plate (1) is set above the shell (9); Adjusting limiting block (2), the left and right sides of the upper pressing plate (1) are respectively provided with the adjusting limiting block (2), and the adjusting limiting block (2) is movably connected with the upper pressing plate (1), the adjusting limiting block (2) is connected with the shell (9) by snap (3) structure, and the upper pressing plate (1) can be driven to press down to extrude electric core (24) top cover; Adjusting bolt (23), it is passed through the adjusting limiting block (2) and extends into the screw hole on the upper pressing plate (1), by rotating the adjusting bolt (23) drive the adjusting limiting block (2) moves along vertical direction, to adjust the pressing height of the upper pressing plate (1) to electric core (24) top cover; Side pressing plate (7) is arranged on the front and back of the shell (9), and is positioned and connected with the shell (9) by positioning pin (10) and magnetic component; Wherein, the side pressing plate (7) is equipped with film pressing port (13) on it, for pressing Mylar film tightly on the surface of electric core (24) top cover before welding;The side wall of the shell (9) is provided with adhesive port (6), so that the operator can paste high-temperature adhesive tape on the joint of Mylar film from the outside.

2. The cell Mylar film package weld integration device of claim 1, wherein, The adjusting limiting block (2) is fixedly connected with the upper pressing plate (1) by movable bolt (18), when the movable bolt (18) is loosened, the adjusting limiting block (2) is allowed to move freely relative to the upper pressing plate (1), and after adjustment is completed, it is re-tightened to lock the position.

3. The cell Mylar film package weld integration apparatus of claim 2, wherein, The adjusting limiting block (2) is L-shaped structure, including embedding part (201) and connecting part (202); The top surface of the upper pressing plate (1) is provided with embedding groove matched with the embedding part (201) at left and right ends, the embedding part (201) is embedded in the embedding groove by interference fit, and at least two first bolt holes (151) for mounting the movable bolt (18) are formed in the embedding part (201), at least two second bolt holes (152) are formed in the upper pressing plate (1), and the second bolt holes (152) correspond to the first bolt holes (151) one by one;The embedding part (201) is also provided with an adjusting through hole (4) for mounting the adjusting bolt (23), and the upper pressing plate (1) is also provided with a third bolt hole (153) corresponding to the adjusting through hole (4); The side of the connecting part (202) and the side of the shell (9) jointly provide the snap (3) structure.

4. The cell Mylar film package weld integration device of claim 1, wherein, The left and right ends of the top of the shell (9) have protruding positioning parts; The middle part of the bottom of the upper pressing plate (1) is provided with two pole column grooves (16) corresponding to the positive and negative poles of the electric core (24), and the left and right ends of the bottom of the upper pressing plate (1) are provided with positioning grooves matched with the positioning parts, so that the upper pressing plate (1) is positioned and installed on the top of the shell (9).

5. The cell Mylar film package weld integration apparatus of claim 1, wherein, The side pressing plate (7) is provided with a plurality of welding ports (8) which avoid welding tools, and the avoiding area corresponds to the welding position of the Mylar film, so that the electric solder can be inserted to perform local hot melt welding.

6. The cell Mylar film package weld integration device of claim 1, wherein, The shell (9) is provided with a positioning pin (10) and a circular magnetic block (11), and the side pressing plate (7) is provided with a positioning pin hole (12) which gaps with the positioning pin (10) and a matching magnetic area which is attracted to the circular magnetic block (11), so as to realize the rapid positioning and preliminary fixing of the side pressing plate (7).

7. The cell Mylar film package weld integration device of claim 1, wherein, The lower part of the upper pressing plate (1) on the front and rear sides is respectively provided with an avoiding groove (14), forming a detachable channel, allowing the side pressing plate (7) to be taken out along the horizontal direction through the avoiding groove (14) by fingers or tools.

8. A method of using the cell Mylar package weld integration apparatus of any of claims 1 to 7, wherein, The method comprises the following steps: S1: Place the electric core (24) wrapped with Mylar film into the electric core groove (901) of the shell (9), and press the electric core (24) to ensure that the bottom of the electric core (24) is tightly attached to the bottom of the electric core groove (901); S2: Adjust the height of the adjusting bolt (23) so that the adjusting limiting block (2) is in the initial low position state to avoid assembly damage; S3: Install the upper pressing plate (1), and realize the positioning and installation of the upper pressing plate (1), the electric core (24) and the shell (9) by using the pole groove (16) and the positioning groove (17), and then connect them with the shell (9) through the buckle (3) structure, so that the upper pressing plate (1) presses the top cover of the electric core (24); S4: Observe the attachment state between the top cover of the electric core (24) and the Mylar film, if there is a gap or overflow, then loosen the movable bolt (18), rotate the adjusting bolt (23) to lift the adjusting limiting block (2), adjust the pressing amount of the upper pressing plate (1), until the attachment is tight; S5: Install the side pressing plate (7) on both sides of the shell (9) through the positioning pin (10) and the magnetic component, and press the front and rear edges of the Mylar film through the film pressing port (13); S6: Position the high-temperature adhesive tape at the joint of the Mylar film through the adhesive port (6); S7: Use the electric solder to perform hot melt welding on the Mylar film through the welding port (8), so that it is firmly connected to the top cover of the electric core (24); S8: After the welding is completed, release the buckle (3) structure, remove the upper pressing plate (1) and the side pressing plate (7), and take out the finished product electric core (24).

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