An electrode group manufacturing method

Abstract

The application provides an electric core lower surface protection film rolling mechanism, which comprises a rotating disc film pasting platform, a first protection film pressure rolling assembly, a first XYZ driving module and a second carrying manipulator. The rotating disc film pasting platform integrates an electric core adsorption platform, a protection film adsorption platform and a first lifting driving module for driving the electric core adsorption platform to lift. When rolling, the second carrying manipulator adsorbs and fixes the electric core, the first lifting driving module drives the electric core adsorption platform to lower to avoid, and the first XYZ driving module drives the first protection film pressure rolling assembly to execute rolling on the lower surface of the electric core in the free space. Through dynamic lowering of the electric core adsorption platform, the space interference between the bearing structure and the pressure rolling assembly is completely eliminated, the pressure rolling assembly completely covers the lower surface of the electric core (including the edge area), and the rolling blind area is avoided.

Description

Technical Field

[0001] This application relates to the field of battery cell film application equipment, and in particular to a battery cell lower surface protective film rolling mechanism. Background Technology

[0002] In the lithium-ion battery manufacturing industry, especially in the production of square aluminum-cased cells, an insulating protective film (such as a polyimide (PI) film or a polyester (PET) film) is typically laminated onto the lower surface of the cell to protect it from scratches, corrosion, or short circuits. This process requires the protective film to be flat, bubble-free, wrinkle-free, and tightly adhered to the lower surface of the cell, with a firm fit at the edges. This is crucial for the safety and long-term reliability of the cell.

[0003] Currently, automated equipment with a rolling mechanism is commonly used to apply film to the underside of battery cells. However, a significant technical challenge exists when using such equipment for rolling film application: film quality issues caused by space conflicts. Specifically, to accurately position the battery cells, the equipment typically includes a platform or fixture for supporting and positioning them. When the rolling mechanism needs to enter from below the cell and perform the rolling action, this supporting platform or its associated support structure often occupies the necessary movement space for the rolling assembly. This spatial conflict or interference makes it difficult for the rolling assembly to completely and smoothly cover the target film application area on the underside of the cell (especially areas near the cell edge or the support point of the supporting platform). As a result, the rolling operation may be restricted or unable to apply sufficient pressure, easily leading to defects such as poor adhesion, bubbles, or wrinkles in these critical areas. These defects not only affect the product's appearance but, more seriously, reduce the insulation and protective effect of the protective film, posing potential safety hazards and affecting the overall performance and lifespan of the battery pack. Utility Model Content

[0004] The purpose of this application is to provide a solution to the spatial interference problem between the battery cell support positioning mechanism and the lower surface film rolling assembly, ensuring that the rolling assembly can perform a complete, uniform and sufficient rolling operation on the lower surface of the battery cell without obstruction, thereby achieving high-quality and defect-free protective film bonding.

[0005] A cell under-surface protective film rolling mechanism includes a turntable film application platform, a first protective film rolling assembly, a first XYZ drive module, and a second handling robot. The turntable film application platform is disposed on one side of the first protective film rolling assembly, and the first protective film rolling assembly is mounted on the first XYZ drive module.

[0006] The turntable film application platform includes a turntable device, a battery cell adsorption platform, a first lifting drive module, and a protective film adsorption platform. The battery cell adsorption platform is mounted on the first lifting drive module, which is mounted on the turntable device to drive the battery cell adsorption platform to perform lifting and lowering movements. The protective film adsorption platform is located on the turntable device and on one side of the battery cell adsorption platform to support the protective film. The second handling robot is located on one side of the first protective film pressing and rolling assembly.

[0007] During the rolling process, the second handling robot grips the battery cell, the first protective film rolling assembly is located on the lower surface of the battery cell, the first lifting drive module drives the battery cell adsorption platform to descend, and then the first XYZ drive module is used to drive the first protective film rolling assembly to roll the protective film onto the lower surface of the battery cell.

[0008] Furthermore, the first protective film pressing roller assembly includes a first protective mold pressing roller and a first pressing roller mounting base. The first protective mold pressing roller is mounted on the first pressing roller mounting base and can rotate on the first pressing roller mounting base.

[0009] Furthermore, the first XYZ drive module includes a first Z-axis module, a first Y-axis module, and a first X-axis module, wherein the first Z-axis module is mounted on the first Y-axis module, and the first Y-axis module is mounted on the first X-axis module.

[0010] Furthermore, a position adjustment device is provided on one side of the protective film adsorption platform, and the protective film adsorption platform is mounted on the position adjustment device. The position adjustment device is used to adjust the distance between the protective film adsorption platform and the battery cell adsorption platform.

[0011] Furthermore, the position adjustment device includes an adjustment plate, an adjustment slide rail, and a locking plate. The adjustment plate is mounted on the adjustment slide rail, and the locking plate is located on the rear side of the adjustment slide rail.

[0012] Furthermore, the surface of the adjusting plate near the locking plate is provided with a waist-shaped hole, and the surface of the locking plate is provided with multiple locking holes corresponding to the waist-shaped hole. The adjusting plate is locked in the locking holes of the locking plate after the bolt passes through the waist-shaped hole.

[0013] Furthermore, the second handling robot includes a second battery cell adsorption module, a second protective film adsorption module, and a second YZ axis drive device. The second battery cell adsorption module and the second protective film adsorption module are respectively mounted on the second YZ axis drive device, and the second YZ axis drive device synchronously drives the second battery cell adsorption module and the second protective film adsorption module to perform lifting and horizontal movements.

[0014] Furthermore, the second protective film adsorption module includes a second protective film adsorption platform and a second driving cylinder, wherein the second driving cylinder is used to drive the second protective film adsorption platform to descend and absorb the protective film.

[0015] The beneficial effects of this application are as follows:

[0016] (1) Before rolling, the first lifting drive module drives the cell adsorption platform to actively descend, so that the bearing platform that originally occupied the space below the cell can be completely avoided; the first protective film rolling assembly moves freely in the unobstructed space through the first XYZ drive module, which can completely cover all areas of the lower surface of the cell (including the edge area that is easy to interfere with), avoiding the rolling blind zone caused by the platform blocking.

[0017] (2) The rolling assembly of this application applies uniform pressure to the lower surface of the cell, ensuring that the protective film (especially at the edge) is tightly attached, and completely eliminating defects such as bubbles, wrinkles and poor adhesion; the bonding strength and sealing between the protective film and the cell surface are significantly improved, effectively enhancing the insulation protection performance and reducing battery safety risks.

[0018] (3) The second handling robot of this application continuously adsorbs and fixes the battery cell during the rolling process, maintains the precise positioning of the battery cell, and avoids displacement deviation caused by the platform descent; the turntable film application platform integrates the protective film adsorption and battery cell bearing functions, combined with the lifting and yielding action, to achieve efficient collaboration of multiple processes in a single workstation and improve the efficiency of automated production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the cell lower surface protective film rolling mechanism provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the rotary film application platform and the first protective film roller assembly provided in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of a first protective film roller assembly provided in an embodiment of this application;

[0022] Figure 4 for Figure 1 A magnified view of a portion at point A;

[0023] Figure 5 for Figure 1 A magnified view of the area at point B;

[0024] Figure 6 This is a schematic diagram of the rotary film application platform and the first protective film roller assembly provided in one embodiment of this application from another perspective.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100. Rolling mechanism for protective film on the lower surface of battery cell;

[0027] 110. First protective film roller assembly; 120. First XYZ drive module; 130. Position adjustment device; 140. Second handling robot; 150. Turntable film application platform;

[0028] 111. First protective mold pressure roller; 112. First pressure roller mounting base; 121. First Z-axis module; 122. First Y-axis module; 123. First X-axis module;

[0029] 131. Adjusting plate; 132. Adjusting slide rail; 133. Locking plate;

[0030] 131a, slotted hole; 133a, locking hole;

[0031] 141. Second cell adsorption module; 142. Second protective film adsorption module; 143. Second YZ axis drive device;

[0032] 1421. Second protective film adsorption platform; 1422. Second drive cylinder;

[0033] 151. Turntable device; 152. Battery cell adsorption platform; 153. First lifting drive module; 154. Protective film adsorption platform; Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," etc., are used only for the convenience of describing this application and for 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 on this application. In particular, the understanding of the term "upper" following a noun in the claims should be understood as meaning that the entire inner and outer surfaces of the structure referred to by the noun conform to the definition of "upper."

[0036] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structures, features, and effects provided in this application.

[0037] like Figure 1 and Figure 2As shown, a cell lower surface protective film rolling mechanism 100 includes a turntable film application platform 150, a first protective film rolling assembly 110, a first XYZ drive module 120, and a second handling robot 140. The turntable film application platform 150 is disposed on one side of the first protective film rolling assembly 110, and the first protective film rolling assembly 110 is mounted on the first XYZ drive module 120.

[0038] like Figure 6 As shown, the turntable film application platform 150 includes a turntable device 151, a battery cell adsorption platform 152, a first lifting drive module 153, and a protective film adsorption platform 154. The battery cell adsorption platform 152 is mounted on the first lifting drive module 153, which is mounted on the turntable device 151 to drive the battery cell adsorption platform 152 to perform lifting movements. The protective film adsorption platform 154 is disposed on the turntable device 151 and located on one side of the battery cell adsorption platform 152 to support the protective film. The second handling robot 140 is disposed on one side of the first protective film pressing roller assembly 110.

[0039] During the rolling process, the second handling robot 140 adsorbs the battery cell, the first protective film rolling assembly 110 is located on the lower surface of the battery cell, the first lifting drive module 153 drives the battery cell adsorption platform 152 to descend, and then the first XYZ drive module 120 is used to drive the first protective film rolling assembly 110 to roll the protective film onto the lower surface of the battery cell.

[0040] The specific working principle of the cell lower surface protective film rolling mechanism is as follows:

[0041] When the rolling operation is started, the second handling robot 140 first adsorbs and fixes the battery cell, suspending it above the turntable film application platform 150. At this time, the first protective film rolling assembly 110 moves to the preset starting position on the lower surface of the battery cell through the first XYZ drive module 120. Simultaneously, the first lifting drive module 153 drives the battery cell adsorption platform 152 to descend, so that the support platform that originally supported the battery cell completely avoids it, making room for the rolling assembly to move without obstruction. Subsequently, the first XYZ drive module 120 drives the first protective film rolling assembly 110 to move directionally along the lower surface of the battery cell, rolling the protective film laid flat on the protective film adsorption platform 154 onto the entire lower surface of the battery cell at a uniform speed. At the same time, the second handling robot 140 continues to maintain the stability of the battery cell until the rolling is completed.

[0042] like Figure 3As shown, in one embodiment, the first protective film rolling assembly 110 includes a first protective mold roller 111 and a first roller mounting base 112. The first protective mold roller 111 is mounted on the first roller mounting base 112 and can rotate within the first roller mounting base 112. Through the rotational movement of the first protective mold roller 111 within the first roller mounting base 112, low-friction, uniform rolling of the protective film against the battery cell surface is achieved, preventing stretching and deformation of the film material.

[0043] like Figure 3 As shown, in one embodiment, the first XYZ drive module 120 includes a first Z-axis module 121, a first Y-axis module 122, and a first X-axis module 123. The first Z-axis module 121 is mounted on the first Y-axis module 122, and the first Y-axis module 122 is mounted on the first X-axis module 123. This nested installation of X / Y / Z-axis modules provides high-precision path control in three-dimensional space, ensuring the accuracy of the pressure roller's full-coverage trajectory on the lower surface of the battery cell.

[0044] like Figure 4 As shown, in one embodiment, a position adjustment device 130 is provided on one side of the protective film adsorption platform 154. The protective film adsorption platform 154 is mounted on the position adjustment device 130, which is used to adjust the distance between the protective film adsorption platform 154 and the battery cell adsorption platform 152. By dynamically adjusting the distance between the film platform and the battery cell platform through the position adjustment device 130, different sized battery cells can be quickly adapted, improving the versatility of the equipment.

[0045] like Figure 4 As shown, in one embodiment, the position adjustment device 130 includes an adjustment plate 131, an adjustment slide rail 132, and a locking plate 133. The adjustment plate 131 is mounted on the adjustment slide rail 132, and the locking plate 133 is disposed on the rear side of the adjustment slide rail 132.

[0046] like Figure 4 As shown, in one embodiment, the adjusting plate 131 has a through-hole 131a on its surface near the locking plate 133. The locking plate 133 has multiple locking holes 133a corresponding to the through-hole 131a. The adjusting plate 131 is locked in the locking holes 133a of the locking plate 133 after being bolted through the through-hole 131a. The through-hole 131a matches the multiple locking holes 133a, achieving continuous position adjustment and rigid locking, ensuring no displacement deviation after the membrane platform is positioned.

[0047] like Figure 5As shown, in one embodiment, the second handling robot 140 includes a second battery cell adsorption module 141, a second protective film adsorption module 142, and a second YZ axis drive device 143. The second battery cell adsorption module 141 and the second protective film adsorption module 142 are respectively mounted on the second YZ axis drive device 143. The second YZ axis drive device 143 synchronously drives the second battery cell adsorption module 141 and the second protective film adsorption module 142 to perform lifting and horizontal movements. With the second battery cell adsorption module 141 and the second protective film adsorption module 142 driven synchronously, the second handling robot 140 simultaneously completes battery cell fixation and film material handling, optimizing cycle time.

[0048] like Figure 5 As shown, in one embodiment, the second protective film adsorption module 142 includes a second protective film adsorption platform 1421 and a second drive cylinder 1422. The second drive cylinder 1422 is used to drive the second protective film adsorption platform 1421 to descend and absorb the protective film. The cylinder directly drives the adsorption platform to descend and pick up the film, providing a fast response and stable negative pressure adsorption force, ensuring the consistency of the film material transfer position.

[0049] The embodiments described above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A rolling mechanism for a protective film on the lower surface of a battery cell, characterized in that: It includes a turntable film application platform, a first protective film roller assembly, a first XYZ drive module, and a second handling robot. The turntable film application platform is located on one side of the first protective film roller assembly, and the first protective film roller assembly is mounted on the first XYZ drive module. The turntable film application platform includes a turntable device, a battery cell adsorption platform, a first lifting drive module, and a protective film adsorption platform. The battery cell adsorption platform is mounted on the first lifting drive module, which is mounted on the turntable device to drive the battery cell adsorption platform to perform lifting and lowering movements. The protective film adsorption platform is located on the turntable device and on one side of the battery cell adsorption platform to support the protective film. The second handling robot is located on one side of the first protective film pressing and rolling assembly. During the rolling process, the second handling robot grips the battery cell, the first protective film rolling assembly is located on the lower surface of the battery cell, the first lifting drive module drives the battery cell adsorption platform to descend, and then the first XYZ drive module is used to drive the first protective film rolling assembly to roll the protective film onto the lower surface of the battery cell.

2. The mechanism according to claim 1, wherein: The first protective film roller assembly includes a first protective mold roller and a first roller mounting base. The first protective mold roller is mounted on the first roller mounting base and can rotate on the first roller mounting base.

3. The mechanism according to claim 1, wherein: The first XYZ drive module includes a first Z-axis module, a first Y-axis module, and a first X-axis module. The first Z-axis module is mounted on the first Y-axis module, and the first Y-axis module is mounted on the first X-axis module.

4. The mechanism according to claim 1, wherein: A position adjustment device is provided on one side of the protective film adsorption platform. The protective film adsorption platform is mounted on the position adjustment device, which is used to adjust the distance between the protective film adsorption platform and the battery cell adsorption platform.

5. The mechanism according to claim 4, wherein: The position adjustment device includes an adjustment plate, an adjustment slide rail, and a locking plate. The adjustment plate is mounted on the adjustment slide rail, and the locking plate is located on the rear side of the adjustment slide rail.

6. The mechanism according to claim 5, wherein: The adjusting plate has a through-hole in the surface near the locking plate, and the locking plate has multiple locking holes on its surface corresponding to the through-hole. The adjusting plate is locked in the locking holes of the locking plate after being bolted through the through-hole.

7. The mechanism according to claim 1, wherein: The second handling robot includes a second battery cell adsorption module, a second protective film adsorption module, and a second YZ axis drive device. The second battery cell adsorption module and the second protective film adsorption module are respectively mounted on the second YZ axis drive device. The second YZ axis drive device synchronously drives the second battery cell adsorption module and the second protective film adsorption module to perform lifting and horizontal movements.

8. The mechanism according to claim 7, wherein: The second protective film adsorption module includes a second protective film adsorption platform and a second driving cylinder. The second driving cylinder is used to drive the second protective film adsorption platform to descend and absorb the protective film.

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