Battery cell film pasting device

Abstract

The utility model discloses a battery cell film pasting device, and relates to the technical field of batteries. The battery cell film pasting device comprises a glue preparation unit, a tab clamping mechanism and a film pasting mechanism. The tab clamping mechanism comprises a first clamping driving assembly and a first clamping jaw, and the first clamping driving assembly is connected with the first clamping jaw so as to drive the first clamping jaw to clamp or release a tab. The film pasting mechanism comprises a position adjusting assembly and a film taking assembly, the film taking assembly is arranged on the position adjusting assembly, the position adjusting assembly is used for driving the film taking assembly to move between a film taking position and a film pasting position, and the film taking assembly is used for taking and placing a protective film; after the first clamping jaw clamps the tab, the film taking assembly moves to the film taking position and takes away the protective film, then the film taking assembly moves towards the film pasting position so that the tab can penetrate through the avoiding hole, the first clamping jaw releases the tab after penetrating, and the film taking assembly moves the protective film to the film pasting position so that the protective film can be pasted to the side face of the battery cell. According to the battery cell film pasting device, the film pasting coverage degree of battery cell die trimming can be enhanced, and the use stability and reliability of a battery cell are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery cell film application device. Background Technology

[0002] With the rapid development of new energy, the market is paying more and more attention to the safety performance of new energy power batteries, and new energy battery companies are also raising their requirements for battery quality.

[0003] Current cell bonding devices have limitations in design; they cannot provide complete wrapping protection for the die-cut surface of the cell, but only apply adhesive to the tab area. This method leaves the die-cut surface of the cell exposed, significantly reducing the protective effect. There is a risk that welding slag may fall onto the electrode and cause a short circuit, thus affecting the safety and reliability of the battery.

[0004] Therefore, there is room for improvement in the adhesive application device for battery cells. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery cell film-applying device, which can enhance the film coverage of the die-cut edges of the battery cell, thereby improving the stability and reliability of the battery cell in use.

[0006] According to an embodiment of the present invention, a battery cell film-applying device is used to prepare a battery cell. The battery cell has a side surface and includes tabs connected to the side surface. The side surface is adapted to be positioned at a film-applying location. The battery cell film-applying device of this application includes: an adhesive preparation unit, a tab-clamping mechanism, and a film-applying mechanism. The adhesive preparation unit is used to supply a protective film to a film-receiving location, wherein the protective film has clearance holes. The tab-clamping mechanism includes a first clamping drive assembly and a first gripper. The first clamping drive assembly is connected to the first gripper to drive the first gripper to clamp or release the tabs. The film application mechanism includes an adjustment component and a film-removing component. The film-removing component is disposed on the adjustment component and is used to drive the film-removing component to move between the film-removing position and the film-applying position. The film-removing component is used to pick up and place the protective film. After the first gripper clamps the tab, the film-removing component moves to the film-removing position and removes the protective film. Then, the film-removing component moves to the film-applying position so that the tab passes through the clearance hole. After passing through, the first gripper releases the tab, and the film-removing component moves the protective film to the film-applying position to apply it to the side of the battery cell.

[0007] According to the battery cell film application device of this utility model embodiment, a glue preparation mechanism supplies a protective film with clearance holes to the film picking position. A film application mechanism drives the film picking assembly to move flexibly between the film picking position and the film application position. A tab clamping mechanism clamps and positions the tabs before film application, facilitating the film application mechanism to pass the clearance holes on the film through the tabs and apply the film to the side of the battery cell.

[0008] According to some embodiments of the present invention, the cell film application device includes a film-absorbing plate, wherein the film-absorbing plate is provided with vacuum suction holes for connecting to a vacuum source.

[0009] In some optional embodiments, the suction plate includes: a main suction plate, a first suction plate, and a second suction plate. The main suction plate is positioned facing the side of the battery cell. The first suction plate is located on one side of the main suction plate. The second suction plate is located on the other side of the main suction plate. The vacuum suction hole includes: a main suction hole on the main suction plate, a first suction hole on the first suction plate, and a second suction hole on the second suction plate. The first suction plate, the main suction plate, and the second suction plate are arranged along the thickness direction of the electrode tab.

[0010] In some optional embodiments, the battery cell further has a first end face and a second end face connected to both sides of the battery cell side; the first film-absorbing sub-plate is movable relative to the main film-absorbing sub-plate along the length direction of the tab to attach a portion of the protective film to the first end face; the second film-absorbing sub-plate is movable relative to the main film-absorbing sub-plate along the length direction of the tab to attach a portion of the protective film to the second end face; the film-taking assembly further includes: a first moving drive member connected to the first film-absorbing sub-plate, the first moving drive member being connected to the first film-absorbing sub-plate to drive the first film-absorbing sub-plate to move; and a second moving drive member connected to the second film-absorbing sub-plate, the second moving drive member being connected to the second film-absorbing sub-plate to drive the second film-absorbing sub-plate to move.

[0011] Optionally, the main suction port, the first suction port, and the second suction port are not interconnected and are each connected to an independent vacuum source.

[0012] In some embodiments, the film-taking assembly further includes: a film-attaching fixing seat and an elastic part, the elastic part being connected to the side of the film-attaching fixing seat facing the film-attaching position, and the main film-absorbing sub-plate being connected to the elastic part so that the main film-absorbing sub-plate can move elastically along the length direction of the tab.

[0013] Optionally, the film-taking assembly further includes: a guide post disposed on the film-applying fixing seat, the guide post extending along the length direction of the tab, and the main film-absorbing sub-plate sleeved on the guide post; the elastic part is a spring sleeved on the guide post, and the two ends of the spring are connected to the film-applying fixing seat and the main film-absorbing sub-plate.

[0014] In some optional embodiments, the film-taking assembly further includes: a film-applying base and a third moving drive, wherein the film-applying base is connected to the adjusting assembly so that the adjusting assembly can drive the film-applying base to move; the third moving drive is disposed on the film-applying base and is connected to the film-applying fixing seat so as to drive the film-applying fixing seat to move along the length direction of the tab.

[0015] According to some embodiments of the present invention, the cell film application device further includes: a second clamping drive component and a second gripper, the second clamping drive component being disposed on the adjustment component; the second clamping drive component being connected to the second gripper to drive the second gripper to clamp or release the electrode tab; the second gripper being used to clamp the electrode tab after it passes through the clearance hole.

[0016] In some optional embodiments, the film-taking assembly further includes: at least two suction plates, each suction plate having a vacuum suction hole; and a second gripper disposed between the two suction plates.

[0017] In some optional embodiments, the suction plates are three arranged at intervals, and the second gripper is arranged in the same row as the middle suction plate.

[0018] According to some optional embodiments of the present invention, the first gripper includes a pair of first gripping rods; the first gripping drive assembly includes a first gripping cylinder that is respectively connected to the two gripping rods, and the two first gripping cylinders respectively drive the two first gripping rods to move independently.

[0019] Optionally, the adhesive preparation unit includes: an unwinding shaft, a rewinding shaft, a main drive shaft, a detection component, and a film feeding component. The unwinding shaft is fitted with a first rewinder, which has a strip of material with the protective film attached to it. The rewinding shaft is fitted with a second rewinder, which winds up the strip of material to remove the protective film. The main drive shaft cooperates with the strip to move it, causing the rewinding shaft to release the strip and the unwinding shaft to rewind it. The detection component detects when the protective film reaches the film-ready position. The film feeding component pushes the protective film from the film-ready position to the film-ready position.

[0020] In some alternative embodiments, the film-feeding assembly includes a wedge block pressed onto the strip, the wedge block being movable along the thickness direction of the strip.

[0021] Optionally, the adhesive preparation unit further includes an adhesive pressing block located between the film feeding assembly and the unwinding shaft. The adhesive pressing block contacts and engages with the material strip and is movable along the thickness direction of the material strip, used to tighten the material strip when the protective film reaches the film-ready position.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the structure of the battery cell to which the protective film needs to be attached in some embodiments of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the battery cell film-applying device in some embodiments of this utility model;

[0026] Figure 3 This is a schematic diagram of the clamping lug mechanism in some embodiments of the present invention;

[0027] Figure 4 This is a schematic diagram of the mold-taking component in some embodiments of the present invention.

[0028] Figure label:

[0029] Battery cell film application device 100

[0030] Glue preparation unit 10, unwinding shaft 11, rewinding shaft 13, main drive shaft 15, detection assembly 17, film unwinding assembly 18, wedge block 181, glue pressing block 19.

[0031] Clamping tab mechanism 20, first clamping drive assembly 22, first clamping cylinder 221, first gripper 24, first clamping rod 241

[0032] The components include: film application mechanism 30, positioning assembly 32, mold taking assembly 34, film suction plate 341, main film suction sub-plate 3411, first film suction sub-plate 3412, second film suction sub-plate 3413, vacuum suction hole 342, main suction hole 3421, first suction hole 3422, second suction hole 3423, first moving drive component 342, second moving drive component 343, film application fixing base 344, elastic part 345, guide post 346, film application base 347, third moving drive component 348, second clamping drive assembly 36, second gripper 37, and adhesive pressing drive component 38.

[0033] Battery cell 200, battery cell side 201, first end face 202, electrode tab 204. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "top," and "bottom," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0037] According to an embodiment of the present invention, the cell film application device 100 is used to apply a film to the cell 200.

[0038] Combination Figure 1This battery cell 200 has a cell side surface 201, and the battery cell 200 includes a tab 204 connected to the cell side surface 201. The cell side surface 201 is adapted to be disposed at the film-attaching position. Here, the cell side surface 201 is the die-cut surface of the battery cell 200.

[0039] The following is for reference. Figures 2-4 Describe the structure of the battery cell film application device 100.

[0040] Combination Figure 2 The battery cell film application device 100 includes: an adhesive preparation unit 10, a clamping tab mechanism 20, and a film application mechanism 30.

[0041] The adhesive preparation unit 10 is responsible for preparing the protective film, ensuring that the pre-set clearance holes on the protective film match the positions of the tabs 204 on the battery cell 200. The tab clamping mechanism 20 is used to stably and accurately clamp the tabs 204 of the battery cell 200, providing a solid foundation for subsequent film application. The film application mechanism 30 is used to apply the protective film to the side 201 of the battery cell, covering and protecting the die-cut edges and surrounding areas of the battery cell 200.

[0042] The adhesive preparation unit 10 is used to supply the protective film to the film taking position, wherein the protective film is provided with clearance holes.

[0043] Generally speaking, refer to Figure 1 The battery cell 200 has two tabs 204. Therefore, the number of clearance holes on the protective film is the same as the number of tabs 204, and the positions of the two clearance holes correspond to the positions of the tabs 204 of the two battery cells 200, respectively.

[0044] Combination Figure 2 and Figure 3 The electrode clamping mechanism 20 includes a first clamping drive assembly 22 and a first gripper 24. The first clamping drive assembly 22 is connected to the first gripper 24 to drive the first gripper 24 to clamp or release the electrode 204.

[0045] The first clamping drive assembly 22 serves as a power source, providing stable and precise motion control for the first gripper 24. The first clamping drive assembly 22 can precisely control the opening and closing of the first gripper 24, ensuring that appropriate force is applied when clamping the tab 204, preventing damage to the tab 204 while maintaining the stability and positional accuracy of the tab 204 during film application.

[0046] For example, the first gripper 24 can hold the tab 204 part of the battery cell 200 to ensure the stability of the tab 204 position, so that the film application mechanism 30 can pass the clearance hole on the protective film through the tab 204.

[0047] Optionally, the portion of the first gripper 24 that contacts the tab 204 is provided with a protective layer. This reduces damage to the tab 204 during clamping, while enhancing the clamping effect and improving clamping stability.

[0048] Combination Figure 2 The film application mechanism 30 includes: an adjustment component 32 and a film taking component 34. The film taking component 34 is disposed on the adjustment component 32. The adjustment component 32 is used to drive the film taking component 34 to move between the film taking position and the film applying position. The film taking component 34 is used to take and put the protective film.

[0049] The positioning component 32 ensures that the film-taking component 34 can switch quickly and accurately between two positions, providing necessary support and protection for the film application operation.

[0050] In this process, after the first gripper 24 clamps the tab 204, the film taking assembly 34 moves to the film taking position and removes the protective film. Then, the film taking assembly 34 moves to the film attaching position so that the tab 204 passes through the clearance hole. After passing through, the first gripper 24 releases the tab 204, and the film taking assembly 34 moves the protective film to the film attaching position to attach it to the side 201 of the battery cell.

[0051] The film-taking assembly 34 is directly responsible for taking and placing the protective film. The film-taking assembly 34 can firmly hold the protective film and move between the film-taking position and the film-applying position under the drive of the positioning assembly 32.

[0052] Optionally, the positioning component 32 includes a horizontal adjustment servo motor and a vertical adjustment servo motor to achieve multi-directional adjustment of the mold taking component 34.

[0053] Specifically, at the film-picking position, the film-picking assembly 34 accurately picks up the protective film and ensures that the clearance holes on the protective film match the positions of the tabs 204 of the battery cell 200. Subsequently, the film-picking assembly 34 carries the protective film to the film-applying position.

[0054] During this process, once the first gripper 24 clamps the tab 204 of the battery cell 200 and aligns it with the clearance hole, the film-removing assembly 34 moves the protective film to the side 201 of the battery cell. At this time, the tab 204 will smoothly pass through the clearance hole without being obstructed by the protective film. After the tab 204 enters the clearance hole, the first gripper 24 releases the tab 204, and the film-removing assembly 34 smoothly applies the protective film to the side of the battery cell 200. This completes the film application operation to the side 201 of the battery cell, effectively protecting the side 201.

[0055] It is worth noting that some tiny solder slags may be generated on the side 201 of the battery cell. Therefore, during the manufacturing process of the battery cell 200, attaching a protective film to the side 201 of the battery cell can effectively cover the side 201 of the battery cell and prevent solder slags and other impurities from falling onto the tab 204, causing a short circuit risk and affecting the performance of the battery cell 200.

[0056] According to some embodiments of the present invention, a battery cell film-applying device, such as... Figure 4 As shown, the membrane taking assembly 34 includes: a membrane suction plate 341, and a vacuum suction hole 342 on the membrane suction plate 341, which is used to connect to a vacuum source.

[0057] These vacuum suction holes 342 serve as a bridge connecting the film-attaching plate and the protective film. In actual operation, the vacuum suction holes 342 are connected to a vacuum source, and the negative pressure generated by the vacuum pump firmly adheres the protective film to the suction plate 341. This adsorption method is not only stable and reliable, but also ensures that the protective film will not shift or fall off during movement, thereby improving the accuracy and efficiency of the film application operation.

[0058] Optionally, there may be one vacuum suction hole 342. This vacuum suction hole 342 can be located at the center of the suction plate 341 or adjusted according to the shape and size of the protective film, without specific limitation. Alternatively, there may be multiple vacuum suction holes 342. Multiple vacuum suction holes 342 can be arranged along the edge of the protective film to form one or more continuous suction areas. Multiple vacuum suction holes 342 can provide more uniform and stable suction force, ensuring that the protective film remains flat and stable during movement. Especially for larger or thinner protective films, multiple vacuum suction holes 342 can provide stronger support, preventing the protective film from sagging or deforming during the application process. Multiple vacuum suction holes 342 are evenly arranged near the clearance holes. By arranging vacuum suction holes 342 around the clearance holes, precise control of the edge of the clearance holes can be achieved, ensuring better adhesion of the protective film to the side 201 of the battery cell.

[0059] Optionally, the vacuum source provides an adsorption force greater than -50 kPa. This ensures sufficient adsorption force to guarantee that the protective film adheres to the vacuum suction hole 342, preventing relative displacement of the protective film during movement, thereby improving the accuracy of the bonding and ensuring the protective effect of the battery cell 200.

[0060] In some alternative embodiments, see Figure 4The suction plate 341 includes a main suction plate 3411, a first suction plate 3412, and a second suction plate 3413. The main suction plate 3411 is positioned facing the side 201 of the battery cell. The first suction plate 3412 is located on one side of the main suction plate 3411. The second suction plate 3413 is located on the other side of the main suction plate 3411. The vacuum suction hole 342 includes a main suction hole 3421 on the main suction plate 3411, a first suction hole 3422 on the first suction plate 3412, and a second suction hole 3423 on the second suction plate 3413. The first suction plate 3412, the main suction plate 3411, and the second suction plate 3413 are arranged along the thickness direction of the tab 204.

[0061] In the above technical solution, the main suction film sub-plate 3411 is directly facing the side 201 of the battery cell. The main function of the main suction film sub-plate 3411 is to adsorb the protective film and precisely align it with the side 201 of the battery cell. Optionally, the main suction film sub-plate 3411 is provided with multiple main suction holes 3421. These suction holes generate suction through a vacuum system to firmly adsorb the protective film onto the surface of the main suction film sub-plate 3411.

[0062] Optionally, the main suction holes 3421 are typically evenly distributed along the edge or central area of ​​the protective film to ensure that the protective film can be uniformly adsorbed onto the surface of the main suction film sub-plate 3411. The number and size of the main suction holes 3421 can be adjusted according to the area and material of the protective film to achieve the best adsorption effect.

[0063] The first suction plate 3412 is located on one side of the main suction plate 3411. The first suction plate 3412 is situated at one end of the main suction plate 3411 along the thickness direction of the tab 204. The first suction plate 3412 assists in adsorbing the protective film, ensuring that the protective film does not deviate from its predetermined position due to external forces (such as gravity, wind, etc.) during the application process. The first suction plate 3412 is provided with first suction holes 3422. These first suction holes 3422 also generate suction through a vacuum system, forming a stable adsorption system together with the main suction holes 3421. Here, the first suction holes 3422 can be located at the edge of the protective film or near the main suction holes 3421. This provides additional suction to enhance the stability of the entire adsorption system. The number and layout of these first suction holes 3422 can also be adjusted according to actual needs.

[0064] Optionally, there may be one first suction hole 3422, or there may be multiple first suction holes 3422 evenly distributed on the first suction film subplate 3412.

[0065] Similar to the first suction plate 3412, the second suction plate 3413 is located on the other side of the main suction plate 3411 and is used to further stabilize and assist in the adsorption of the protective film. The second suction holes 3423 on the second suction plate 3413 also generate suction through a vacuum system, working in conjunction with the main suction hole 3421 and the first suction hole 3422 to ensure the stability and accuracy of the protective film during the application process. Optionally, there may be one second suction hole 3423, or multiple second suction holes 3423 evenly distributed on the first suction plate 3412. Here, the position of the second suction holes 3423 can be located at the edge of the protective film or near the main suction hole 3421. This provides additional suction to enhance the stability of the entire adsorption system. The number and layout of these second suction holes 3423 can also be adjusted according to actual needs.

[0066] In some optional embodiments, one of the main suction hole 3421, the first suction hole 3422, and the second suction hole 3423 is a plurality of circular array holes.

[0067] Optionally, the main suction hole 3421, the first suction hole 3422, and the second suction hole 3423 are not limited to round holes, but can also be strip holes or have a suction cup structure embedded in the main suction film sub-plate 3411, the first suction film sub-plate 3412, and the second suction film sub-plate 3413.

[0068] The first suction film sub-plate 3412, the main suction film sub-plate 3411, and the second suction film sub-plate 3413 are typically arranged along the thickness direction of the tab 204 of the battery cell 200. This arrangement ensures that the protective film can be smoothly covered on the side 201 of the battery cell during the film application process, without wrinkles or misalignment due to the thickness difference of the tab 204.

[0069] In some alternative embodiments, the cell 200 also has a first end face 202 and a second end face connected to both sides of the cell side 201.

[0070] Combination Figure 1 The first end face 202 and the second end face are disposed opposite to each other, and the first end face 202 and the second end face are respectively located on both sides of the tab 204 in the thickness direction. Due to the viewing angle, the second end face is not shown in the figure.

[0071] The first suction film subplate 3412 is movable relative to the main suction film subplate 3411 along the length direction of the tab 204 to attach part of the protective film to the first end face 202.

[0072] Specifically, after the protective film is covered on the side 201 of the cell, the first film-absorbing sub-plate 3412 continues to move relative to the main film-absorbing sub-plate 3411 along the length of the tab 204 to attach part of the protective film to the first end face 202.

[0073] Optionally, the first suction plate 3412 moves linearly along the length of the tab 204 via a guide rail or slide rail system, where the length of the tab 204 is also the long axis of the cell 200.

[0074] Optionally, after the protective film contacts the first end face 202 of the battery cell 200, the first suction plate 3412 can remain stationary for a period of time to ensure that the protective film is completely adhered to the first end face 202 under the action of vacuum suction, without bubbles or wrinkles.

[0075] Similarly, the second suction film subplate 3413 is movable relative to the main suction film subplate 3411 along the length of the tab 204 to attach a portion of the protective film to the second end face.

[0076] Specifically, after the protective film is applied to the side 201 of the cell, the second film-absorbing sub-plate 3413 continues to move relative to the main film-absorbing sub-plate 3411 along the length of the tab 204 to attach part of the protective film to the second end face.

[0077] Optionally, the second suction plate 3413 moves linearly along the length direction of the tab 204 via a guide rail or slide rail system, where the length direction of the tab 204 is also the long axis direction of the cell 200.

[0078] Optionally, after the protective film contacts the second end face of the battery cell 200, the second suction plate 3413 can remain stationary for a period of time to ensure that the protective film is completely adhered to the second end face under the action of vacuum suction, without bubbles or wrinkles.

[0079] By covering the side 201 of the battery cell with a protective film and then extending it to the first end face 202 and the second end face of the battery cell 200, the wrinkles and unevenness of the protective film on the side 201 of the battery cell can be effectively flattened, ensuring that the protective film is tightly attached to the surface of the battery cell 200, thereby improving the uniformity and reliability of the protection.

[0080] Simultaneously, the coverage area of ​​the protective film on the battery cell 200 is increased to prevent the protective film from being poorly adhered to the side 201 of the battery cell, which could lead to peeling or other issues. This enhances the protective effect on the side 201 of the battery cell and further strengthens the connection strength and stability between the protective film and the side 201 of the battery cell. This larger coverage area and firm connection also improves the control of welding dust, reduces the short circuit rate after the battery cell 200 is assembled and installed in the casing, and may even prevent short circuits caused by welding dust.

[0081] like Figure 2As shown, the film-taking assembly 34 further includes: a first moving drive 342 connected to the first film-absorbing sub-plate 3412 and a second moving drive 343 connected to the second film-absorbing sub-plate 3413. The first moving drive 342 is connected to the first film-absorbing sub-plate 3412 to drive the first film-absorbing sub-plate 3412 to move. The second moving drive 343 is connected to the second film-absorbing sub-plate 3413 to drive the second film-absorbing sub-plate 3413 to move.

[0082] The first moving drive 342 and the second moving drive 343 can be implemented using various existing technologies, including but not limited to stepper motors, servo motors, pneumatic or hydraulic drives, etc. These drive components all have the characteristics of high precision, high stability and easy programming control, thus meeting the requirements for precise position and speed control during the film application process of the battery cell 200.

[0083] The first moving drive unit 342 drives the first film suction plate 3412 to move along a predetermined trajectory, such as the length direction of the tab 204, thereby improving the precise control of the movement of the first film suction plate 3412 and ensuring that the first film suction plate 3412 can accurately reach above the first end face 202 of the cell 200 and attach the protective film to the end face.

[0084] The second moving drive 343 drives the second film suction plate 3413 to move along a predetermined trajectory, such as the length direction of the tab 204, thereby improving the precise control of the movement of the second film suction plate 3413 and ensuring that the second film suction plate 3413 can accurately reach above the second end face of the cell 200 and attach the protective film to that end face.

[0085] Optionally, the main suction port 3421, the first suction port 3422, and the second suction port 3423 are not interconnected and are each connected to an independent vacuum source.

[0086] This design ensures that the operation of each suction port does not affect the others. Even if the vacuum in one channel is abnormal, the other suction ports can still work normally, ensuring the stability and continuity of the adhesive application process, thereby improving the overall uptime of the equipment.

[0087] In some such Figure 4 In the embodiment shown, the film-taking assembly 34 further includes a film-attaching fixing seat 344 and an elastic part 345. The elastic part 345 is connected to the side of the film-attaching fixing seat 344 facing the film-attaching position. The main film-absorbing sub-plate 3411 is connected to the elastic part 345 so that the main film-absorbing sub-plate 3411 can move elastically along the length direction of the tab 204.

[0088] In the above technical solution, the film-applying fixing seat 344 serves as the support base for the mold-taking component 34, providing a reliable support platform for the film-applying operation.

[0089] Closely connected to the film-applying holder 344 is the elastic part 345. It is connected to the side of the film-applying holder 344 facing the film-applying position. The elastic part 345 is made of a material with high elasticity and resilience, such as a spring sheet or rubber. This allows it to deform and recover to a certain extent according to actual needs.

[0090] Specifically, the main suction plate 3411 is connected to the elastic part 345. This connection allows the main suction plate 3411 to move elastically along the length of the tab 204 of the battery cell 200. When the battery cell 200 is delivered to the film application position, the main suction plate 3411, under the action of the elastic part 345, makes fine adjustments according to the actual size and shape of the battery cell 200 to ensure that the protective film can be tightly adhered to the side 201 of the battery cell. This design not only improves the accuracy of the film application process but also enhances the adaptability and flexibility of the film-taking assembly 34.

[0091] By incorporating the elastic portion 345, the main film-absorbing sub-plate 3411 can generate a certain pressure during film application, uniformly pressing the protective film onto the side 201 of the battery cell. This pressure ensures a good fit between the protective film and the battery cell 200, preventing bulging after application. Simultaneously, due to the presence of the elastic portion 345, the main film-absorbing sub-plate 3411 maintains a certain degree of flexibility during film application, thus avoiding excessive pressure on the separator of the battery cell 200, which could lead to separator folding or damage.

[0092] Optional, combined Figure 4 The film-taking assembly 34 further includes: a guide post 346, which is disposed on the film-applying fixing seat 344 and extends along the length direction of the tab 204; the main film-absorbing sub-plate 3411 is sleeved on the guide post 346. The elastic part 345 is a spring sleeved on the guide post 346, and the two ends of the spring are connected to the film-applying fixing seat 344 and the main film-absorbing sub-plate 3411.

[0093] The guide post 346 is used to provide a stable moving track for the main suction film sub-plate 3411, ensuring that the main suction film sub-plate 3411 can maintain a straight movement during the movement without tilting or shaking.

[0094] The design of the guide post 346 typically takes into account the rigidity and wear resistance of the material to ensure that it maintains high precision and long service life during use. At the same time, the surface of the guide post 346 may undergo special treatments, such as polishing or coating, to reduce friction with the main suction film subplate 3411 and improve the smoothness of movement.

[0095] The spring is an elastic component 345 connecting the film-applying mounting base 344 and the main film-absorbing sub-plate 3411, and it is sleeved on the guide post 346. The main function of the spring is to provide an elastically movable support for the main film-absorbing sub-plate 3411, so that the main film-absorbing sub-plate 3411 can be finely adjusted according to the actual size and shape of the battery cell 200 to ensure that the protective film can be tightly adhered to the side of the battery cell 200.

[0096] Specifically, during the film application process, when the battery cell 200 is delivered to the film application position, the main film suction plate 3411 moves along the guide post 346 under the action of a spring. Because the spring has a certain degree of elasticity, the main film suction plate 3411 can be finely adjusted according to the actual size and shape of the battery cell 200, ensuring that the protective film can be tightly adhered to the side 201 of the battery cell. At the same time, the presence of the guide post 346 also ensures the stability and accuracy of the main film suction plate 3411 during its movement.

[0097] Once the protective film is applied, the spring, under its elastic force, pushes the main film-absorbing sub-plate 3411 back to its initial position, preparing for the next film application operation. This structural design not only improves the efficiency and quality of film application to the battery cell 200, but also enhances the adaptability and flexibility of the film-taking assembly 34.

[0098] Continue reading Figure 4 In some optional embodiments, the film-attaching assembly 34 further includes a film-attaching base 347 and a third moving drive 348. The film-attaching base 347 is connected to the adjusting assembly 32 so that the adjusting assembly 32 can move the film-attaching base 347. The third moving drive 348 is disposed on the film-attaching base 347 and is connected to the film-attaching fixing seat 344 so as to drive the film-attaching fixing seat 344 to move along the length direction of the tab 204.

[0099] The film-applying base 347 is the mounting platform for the mold-taking assembly 34. It is connected to the positioning assembly 32. Driven by the positioning assembly 32, the film-applying base 347 can move along a specific direction, that is, move from the mold-taking position to the film-applying position.

[0100] The third moving drive unit 348 is a key component mounted on the film-applying base 347. It is responsible for driving the film-applying fixing seat 344 to move along the length of the tab 204. This movement allows the main film-absorbing sub-plate 3411 to be precisely attached to the side 201 of the cell, ensuring that the protective film can completely cover the tab 204 portion of the cell 200.

[0101] The third motion drive 348 can be a stepper motor or a servo motor to ensure precise displacement control during the film application process. Furthermore, to further improve the accuracy and stability of the movement, the third motion drive 348 can also be equipped with precision guide rails and sliders to reduce friction and errors during movement.

[0102] Specifically, during the film application process, the positioning component 32 first adjusts the position of the film application base 347 according to the position and size of the battery cell 200, so that the film application component 34 can accurately align with the battery cell 200. Then, the third moving drive component 348 is activated, driving the film application fixing seat 344 to move along the length direction of the tab 204, while the main film suction plate 3411 is tightly attached to the side 201 of the battery cell under the action of the spring. As the film application fixing seat 344 moves, the protective film is gradually adhered to the side 201 of the battery cell.

[0103] Once the protective film is fully applied, the third moving drive 348 will stop operating and return to its initial position. At this time, the positioning component 32 may readjust the position of the film-applying base 347 to prepare for the next film-applying operation of the battery cell 200.

[0104] According to some embodiments of the present invention, the battery cell film application device, combined with Figure 2 The film application mechanism 30 further includes a second clamping drive assembly 36 and a second gripper 37. The second clamping drive assembly 36 is disposed on the adjustment assembly 32. The second clamping drive assembly 36 is connected to the second gripper 37 to drive the second gripper 37 to clamp or release the tab 204. The second gripper 37 is used to clamp the tab 204 after it has passed through the clearance hole.

[0105] The positioning component 32 is responsible for adjusting the position of the mold-taking component 34 to ensure accurate alignment of the protective film. The second clamping drive component 36 is mounted on the positioning component 32, allowing the second clamping drive component 36 to move along with the positioning component 32.

[0106] Closely connected to the second clamping drive assembly 36 is the second gripper 37, which is used to clamp the tabs 204 on the battery cell 200. Since the second clamping drive assembly 36 is located on the positioning assembly 32, it provides stable support for the second gripper 37. This ensures a stable clamping force from the second gripper 37, guaranteeing that the position of the tabs 204 remains unchanged during the film application process.

[0107] Specifically, in the operation process, after the battery cell 200 is accurately positioned, its tab 204 first passes through the pre-set avoidance hole in the film application mechanism 30. This prevents the protective film from covering the tab 204 when covering the surface of the battery cell 200, thus avoiding interference with subsequent electrical connections. Next, driven by the second clamping drive assembly 36, the second gripper 37 quickly and accurately clamps the tab 204. The stable clamping force of the second gripper 37 ensures that the position of the tab 204 remains unchanged during the film application process. This improves the accuracy and efficiency of the film application, thereby ensuring the reliability of the battery cell 200.

[0108] Optionally, the second clamping drive assembly 36 can be driven by various methods such as electric, pneumatic or hydraulic, depending on the needs of the actual application scenario.

[0109] In some optional embodiments, the film-taking assembly 34 further includes at least two suction plates 341, each suction plate 341 having a vacuum suction hole 342. A second gripper 37 is disposed between the two suction plates 341.

[0110] The suction plate 341 is used to adsorb and fix the protective film so that it can be accurately and stably attached to the side 201 of the battery cell during the film application process. Each suction plate 341 is provided with vacuum suction holes 342. These vacuum suction holes 342 can generate a strong suction force by connecting a vacuum pump or negative pressure system, so as to firmly adsorb the protective film onto the suction plate 341.

[0111] The second gripper 37 is located between the two suction plates 341 and is used to clamp the tab 204 after it passes through the clearance hole. This design allows the second gripper 37 to accurately hold the tab 204 without interfering with the suction plates 341 adsorbing the protective film, ensuring that the battery cell 200 will not shake or shift during the film application process.

[0112] In some alternative embodiments, see Figure 4 The suction plates 341 are three arranged at intervals, and the second gripper 37 is arranged in the same row as the middle suction plate 341.

[0113] First, the three suction plates 341 provide a larger adsorption area, thus more stably fixing the protective film and reducing the possibility of misalignment or detachment during the application process. Second, the spaced suction plates 341 can better adapt to battery cells 200 of different sizes and shapes, ensuring that the protective film can be evenly adhered to the side 201 of the battery cell. Finally, by adjusting the spacing between the suction plates 341, the adhesion between the protective film and the battery cell 200 can be further fine-tuned to achieve a more precise application effect.

[0114] The second gripper 37 is placed on the same row as the intermediate suction plate 341. Since the second gripper 37 is at the same horizontal position as the intermediate suction plate 341, it can directly clamp the tab 204 of the battery cell 200 without interfering with the suction plate 341 adsorbing the protective film, thereby improving the accuracy and efficiency of the operation.

[0115] According to some optional embodiments of the present invention, such as Figure 3 As shown, the first gripper 24 includes a pair of first gripping rods 241. The first gripping drive assembly 22 includes first gripping cylinders 221 that are respectively connected to the two gripping rods, and the two first gripping cylinders 221 drive the two first gripping rods 241 to move independently.

[0116] In this embodiment, the first gripper 24 employs two first gripping bars 241 in a paired design. This paired design not only enhances the stability of the gripping but also allows the first gripper 24 to apply the gripping force more evenly, thereby avoiding unnecessary damage to the tab 204.

[0117] Matching the paired first clamping rods 241, the first clamping drive assembly 22 includes two first clamping cylinders 221 respectively connected to the two first clamping rods 241. These two first clamping cylinders 221 operate independently, each capable of driving the two first clamping rods 241 to perform independent opening and closing actions. This independent drive design allows the first gripper 24 to have greater flexibility and precision during clamping, enabling adjustment of the clamping force and clamping position according to actual needs, thereby achieving more precise clamping control.

[0118] Specifically, in actual operation, when it is necessary to clamp the tab 204, the two first clamping cylinders 221 will be activated simultaneously or separately, driving the two first clamping rods 241 to move towards the center according to a preset program or instruction, until they tightly clamp the tab 204. Since the two cylinders are driven independently, the clamping force and clamping position of the first clamping jaws 24 can be flexibly adjusted according to the shape, size and clamping requirements of each tab 204.

[0119] During clamping, the two first clamping rods 241 can move synchronously or asynchronously. After the tab 204 is clamped, the first gripper 24 moves along with other components to perform the film application task. After completing the task, the two first clamping cylinders 221 will restart, driving the two first clamping rods 241 to move in opposite directions, releasing the tab 204 and returning to the initial position, preparing for the next clamping operation.

[0120] Optional, combined Figure 2The adhesive preparation unit 10 includes: an unwinding shaft 11, a take-up shaft 13, a main drive shaft 15, a detection assembly 17, and a film feeding assembly 18. The unwinding shaft 11 is used to mount a first roll, which has a strip of material with a protective film attached. The take-up shaft 13 is used to mount a second roll, which is used to wind the strip of material to remove the protective film. The main drive shaft 15 cooperates with the strip to drive its movement, so that the take-up shaft 13 releases the strip and the unwinding shaft 11 winds it up. The detection assembly 17 detects when the protective film reaches the film-ready position. The film feeding assembly 18 pushes the protective film from the film-ready position to the film-ready position.

[0121] In the above technical solution, the unwinding shaft 11 is used in the adhesive preparation unit 10 to support and release the protective film strip. It is strong enough to withstand the weight of the strip roll and maintain stable rotation. A first reel, on which the protective film strip is wound, can be fitted onto the unwinding shaft 11. This design allows users to quickly change protective film strips of different specifications or types to adapt to different production needs.

[0122] Corresponding to the unwinding shaft 11 is the take-up shaft 13, which is used to receive and wind the tape after the protective film has been removed. Similarly, a second roll can also be fitted onto the take-up shaft 13 as a carrier for winding the tape. After the protective film is removed and used for film application to the battery cell 200, the remaining tape is collected onto the take-up shaft 13 by the drive of the main drive shaft 15, realizing the recycling and clean management of the tape.

[0123] The main drive shaft 15 is the power core of the glue preparation unit 10. It drives the material belt to move back and forth in cooperation with the material belt. This movement enables the unwinding shaft 11 to release the material belt and the rewinding shaft 13 to wind the material belt.

[0124] The detection component 17 is a smart sensor in the adhesive preparation unit 10, responsible for detecting when the protective film arrives at the designated position. This function is crucial because it ensures that the protective film is pushed to the pickup position at the correct time, thus avoiding misalignment or waste during the application process. The detection component 17 may employ technologies such as photoelectric sensors and mechanical switches to achieve accurate detection and feedback.

[0125] The film-dispensing assembly 18 is the actuator in the adhesive preparation unit 10 responsible for pushing the protective film from the waiting position to the film-receiving position. Optionally, the film-dispensing assembly 18 may include components such as a push rod, a slider, and a motor, which, through precise control and coordination, accurately push the protective film from the waiting position to the film-receiving position. The design of the film-dispensing assembly 18 ensures the smooth progress of the film application process.

[0126] Specifically, in the workflow of the adhesive preparation unit 10, firstly, the protective film strip on the first reel is released through the unwinding shaft 11 and moves along a predetermined path to the main drive shaft 15. Then, the main drive shaft 15 starts working, driving the strip to move back and forth, while the take-up shaft 13 begins to wind the strip with the protective film already removed. When the detection component 17 detects that the protective film has reached the film-ready position, the film unwinding component 18 is activated, pushing the protective film to the film-ready position. Finally, the film-ready mechanism removes the protective film from the film-ready position and uses it for the film application process of the battery cell 200.

[0127] In some alternative embodiments, see Figure 2 The film feeding assembly 18 includes a wedge block 181 pressed on the material strip, the wedge block 181 being movable along the thickness direction of the material strip.

[0128] In the above technical solution, the wedge block 181 can move along the thickness direction of the material strip to achieve the separation and pushing of the protective film. The wedge block 181 includes an inclined wedge surface and a flat bottom surface. The wedge surface is configured to move along the thickness direction of the material strip (i.e., the tiny gap between the protective film and the release paper), while the bottom surface is used to maintain contact with the material strip and provide necessary support.

[0129] As the wedge block 181 moves along the thickness direction of the strip, its wedge surface gradually inserts into the tiny gap between the protective film and the release paper. Due to the inclined design of the wedge surface, it gradually separates the protective film from the release paper without damaging either the protective film or the release paper. At the same time, the movement of the wedge block 181 also generates a certain thrust, pushing the separated protective film towards the film-taking position, preparing it for the subsequent film application process.

[0130] Optional, such as Figure 2 As shown, the adhesive preparation unit 10 also includes an adhesive pressing block 19 located between the film feeding assembly 18 and the unwinding shaft 11. The adhesive pressing block 19 contacts and engages with the material strip and is movable along the thickness direction of the material strip, and is used to tighten the material strip when the protective film reaches the film position.

[0131] In the above technical solution, the pressure block 19 is used to contact and cooperate with the material strip and can move along the thickness direction of the material strip, so as to effectively tighten the material strip when the protective film reaches the position to be filmed, and prevent it from loosening or misaligning.

[0132] Optionally, the pressure block 19 is also connected to a drive mechanism. As the protective film moves on the strip and approaches the desired position, the pressure block 19 can gradually approach and contact the strip along its thickness direction. Due to the friction between the pressure block 19 and the strip, when the pressure block 19 moves and presses the strip, it effectively tightens the entire strip system, ensuring that the protective film is taut when it reaches the desired position, thus improving the stability of the protective film.

[0133] Optionally, the glue preparation unit 10 may include a guiding mechanism. This guiding mechanism is used to limit the movement trajectory of the pressure block 19, preventing it from deviating or wobbling during movement. At the same time, the guiding mechanism can also provide necessary support and positioning functions to ensure that the pressure block 19 can accurately contact and tighten with the material strip.

[0134] In some optional embodiments, the film application mechanism 30 further includes an adhesive application drive 38. The adhesive application drive 38 is used to drive the first film suction plate 3412 and the second film suction plate 3413 closer to or further apart from each other.

[0135] When the first suction film sub-plate 3412 and the second suction film sub-plate 3413 are close to each other, physical pressure can be used to ensure that the protective film is tightly adhered to the surface of the battery cell 200, preventing air bubbles from forming, and at the same time enhancing the adhesion between the protective film and the surface of the battery cell 200. Optionally, a protective layer is provided on the side of the first suction film sub-plate 3412 and the second suction film sub-plate 3413 facing the surface of the battery cell 200 to reduce damage to the protective film.

[0136] The following is for reference. Figure 2 - Figure 4 The following describes in detail a battery cell film application device according to an embodiment of the present invention, using a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0137] Reference Figure 2 The battery cell film application device includes: an adhesive preparation unit 10, a clamping tab mechanism 20, and a film application mechanism 30.

[0138] The adhesive preparation unit 10 is used to supply the protective film to the film taking position.

[0139] The adhesive preparation unit 10 includes: an unwinding shaft 11, a take-up shaft 13, a main drive shaft 15, a detection assembly 17, a film feeding assembly 18, and an adhesive pressing block 19. The unwinding shaft 11 is used to mount a first roll, which has a strip of material with a protective film attached. The take-up shaft 13 is used to mount a second roll, which is used to wind the strip of material to remove the protective film. The main drive shaft 15 cooperates with the strip to drive its movement, so that the take-up shaft 13 releases the strip and the unwinding shaft 11 winds it up. The detection assembly 17 detects when the protective film reaches the film-ready position. The film feeding assembly 18 pushes the protective film from the film-ready position to the film-ready position.

[0140] The film feeding assembly 18 includes a wedge block 181 pressed on the strip, the wedge block 181 being movable along the thickness direction of the strip.

[0141] The pressure block 19 is located between the film feeding assembly 18 and the unwinding shaft 11. The pressure block 19 contacts and engages with the material strip and is movable along the thickness direction of the material strip. It is used to tighten the material strip when the protective film reaches the position to be filmed.

[0142] Reference Figure 3 The electrode clamping mechanism 20 includes a first clamping drive assembly 22 and a first gripper 24. The first clamping drive assembly 22 is connected to the first gripper 24 to drive the first gripper 24 to clamp or release the electrode 204.

[0143] The first gripper 24 includes a pair of first gripping rods 241. The first gripping drive assembly 22 includes a first gripping cylinder 221 that is connected to the two gripping rods respectively, and the two first gripping cylinders 221 drive the two first gripping rods 241 to move independently.

[0144] Reference Figure 2 The film application mechanism 30 includes: an adjustment component 32, a mold taking component 34, a second clamping drive component 36, and a second gripper 37. The film taking component 34 is disposed on the adjustment component 32, and the adjustment component 32 is used to drive the film taking component 34 to move between the film taking position and the film applying position. The film taking component 34 is used to pick up and put in the protective film.

[0145] In this process, after the first gripper 24 clamps the tab 204, the film taking assembly 34 moves to the film taking position and removes the protective film. Then, the film taking assembly 34 moves to the film attaching position so that the tab 204 passes through the clearance hole. After passing through, the first gripper 24 releases the tab 204, and the film taking assembly 34 moves the protective film to the film attaching position to attach it to the side 201 of the battery cell.

[0146] Reference Figure 2 , Figure 4 The mold-taking assembly 34 includes: a film suction plate 341, a first moving drive 342, a second moving drive 343, a film-applying fixing seat 344, an elastic part 345, a guide post 346, a film-applying base 347, and a third moving drive 348.

[0147] The suction plate 341 is provided with a vacuum suction hole 342, which is used to connect a vacuum source.

[0148] The film suction plate 341 includes: a main film suction sub-plate 3411, a first film suction sub-plate 3412, and a second film suction sub-plate 3413. The main film suction sub-plate 3411 is positioned facing the side 201 of the battery cell. The first film suction sub-plate 3412 is located on one side of the main film suction sub-plate 3411. The second film suction sub-plate 3413 is located on the other side of the main film suction sub-plate 3411.

[0149] The vacuum suction port 342 includes: a main suction port 3421 disposed on the main suction film sub-plate 3411, a first suction port 3422 disposed on the first suction film sub-plate 3412, and a second suction port 3423 disposed on the second suction film sub-plate 3413. The first suction film sub-plate 3412, the main suction film sub-plate 3411, and the second suction film sub-plate 3413 are arranged along the thickness direction of the tab 204.

[0150] The first suction film subplate 3412 is movable relative to the main suction film subplate 3411 along the length direction of the tab 204 to attach part of the protective film to the first end face 202.

[0151] The second suction plate 3413 is movable relative to the main suction plate 3411 along the length of the tab 204 to attach a portion of the protective film to the second end face.

[0152] The first moving drive unit 342 is connected to the first suction plate 3412 to drive the first suction plate 3412 to move.

[0153] The second moving drive unit 343 is connected to the second suction plate 3413 to drive the second suction plate 3413 to move.

[0154] The main suction port 3421, the first suction port 3422 and the second suction port 3423 are not connected to each other and are each connected to an independent vacuum source.

[0155] Reference Figure 4 The elastic part 345 is connected to the side of the film-applying fixing seat 344 facing the film-applying position, and the main film-absorbing sub-plate 3411 is connected to the elastic part 345 so that the main film-absorbing sub-plate 3411 can move elastically along the length direction of the tab 204.

[0156] The guide post 346 is mounted on the film fixing base 344. The guide post 346 extends along the length of the tab 204, and the main suction film plate 3411 is fitted onto the guide post 346.

[0157] The elastic part 345 is a spring sleeved on the guide post 346, and the two ends of the spring are connected to the film fixing seat 344 and the main suction film plate 3411.

[0158] The film-applying base 347 is connected to the adjustment assembly 32, so that the film-applying base 347 can be moved by the adjustment assembly 32. The third moving drive 348 is provided on the film-applying base 347 and is connected to the film-applying fixing seat 344 to drive the film-applying fixing seat 344 to move along the length direction of the tab 204.

[0159] The second clamping drive assembly 36 is disposed on the positioning assembly 32. The second clamping drive assembly 36 is connected to the second gripper 37 to drive the second gripper 37 to clamp or release the electrode tab 204. The second gripper 37 is used to clamp the electrode tab 204 after it passes through the clearance hole.

[0160] The battery cell film application device and its operation according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0161] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0162] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cell film application device, characterized in that, The battery cell has a side surface, the battery cell includes tabs connected to the side surface, the side surface is adapted to be positioned at a film application location, and the battery cell film application device includes: A glue preparation unit is used to supply the protective film to the film taking position, wherein the protective film is provided with clearance holes; A clamping tab mechanism, the clamping tab mechanism including a first clamping drive component and a first gripper, the first clamping drive component being connected to the first gripper to drive the first gripper to clamp or release the tab; The film application mechanism includes: Positioning component; A film-taking assembly is provided on the positioning assembly. The positioning assembly is used to drive the film-taking assembly to move between the film-taking position and the film-applying position. The film-taking assembly is used to take and place the protective film. In this process, after the first gripper clamps the tab, the film-removing assembly moves to the film-removing position and removes the protective film. Then, the film-removing assembly moves to the film-applying position so that the tab passes through the clearance hole. After passing through, the first gripper releases the tab, and the film-removing assembly moves the protective film to the film-applying position to apply it to the side of the battery cell.

2. The battery cell film application device according to claim 1, characterized in that, The film-taking assembly includes a film-suction plate, which has vacuum suction holes for connecting to a vacuum source.

3. The cell film application device according to claim 2, characterized in that, The film suction plate includes: Main suction film sub-plate, the main suction film sub-plate is configured to face the side of the battery cell; The first suction film sub-plate is disposed on one side of the main suction film sub-plate; The second suction film plate is located on the other side of the main suction film plate; The vacuum suction holes include: a main suction hole provided on the main suction film sub-plate, a first suction hole provided on the first suction film sub-plate, and a second suction hole provided on the second suction film sub-plate; The first suction plate, the main suction plate, and the second suction plate are arranged along the thickness direction of the tab.

4. The battery cell film application device according to claim 3, characterized in that, The battery cell also has a first end face and a second end face connected to both sides of the side of the battery cell; The first suction film plate is movable relative to the main suction film plate along the length direction of the tab to attach a portion of the protective film to the first end face; The second suction film plate is movable relative to the main suction film plate along the length direction of the tab to attach a portion of the protective film to the second end face; The membrane-taking assembly further includes: A first moving drive unit connected to the first film suction plate, the first moving drive unit being connected to the first film suction plate to drive the first film suction plate to move; A second moving drive unit is connected to the second suction film sub-plate to drive the second suction film sub-plate to move.

5. The battery cell film application device according to claim 3, characterized in that, The main suction port, the first suction port, and the second suction port are not interconnected and are each connected to an independent vacuum source.

6. The battery cell film application device according to claim 3, characterized in that, The membrane-taking assembly further includes: Film mounting bracket; An elastic part is connected to the side of the film-applying fixing seat facing the film-applying position, and the main suction film plate is connected to the elastic part so that the main suction film plate can move elastically along the length direction of the tab.

7. The battery cell film application device according to claim 6, characterized in that, The membrane-taking assembly further includes: A guide post is provided on the film-attaching fixing base and extends along the length direction of the electrode tab. The main film-absorbing sub-plate is sleeved on the guide post. The elastic part is a spring sleeved on the guide post, and the two ends of the spring are connected to the film fixing seat and the main suction film plate.

8. The battery cell film application device according to claim 6, characterized in that, The membrane-taking assembly further includes: A film-applying base, the film-applying base being connected to the adjustment component, so that the adjustment component can drive the film-applying base to move; A third moving drive is disposed on the film-applying base and connected to the film-applying fixing seat to drive the film-applying fixing seat to move along the length direction of the tab.

9. The battery cell film application device according to claim 1, characterized in that, The film application mechanism also includes: A second clamping drive assembly is disposed on the adjustment assembly; The second gripper, the second gripping drive assembly is connected to the second gripper to drive the second gripper to grip or release the tab; The second gripper is used to clamp the electrode tab after it has passed through the clearance hole.

10. The battery cell film application device according to claim 9, characterized in that, The film-taking assembly further includes: at least two film-suction plates, wherein the film-suction plates are provided with vacuum suction holes; The second gripper is located between the two suction plates.

11. The cell film application device according to claim 10, characterized in that, The suction plates are three arranged at intervals, and the second gripper is arranged in the same row as the middle suction plate.

12. The battery cell film application device according to any one of claims 1-11, characterized in that, The first gripper includes a pair of first grippers; The first clamping drive assembly includes a first clamping cylinder that is connected to the two clamping rods respectively, and the two first clamping cylinders drive the two first clamping rods to move independently.

13. The battery cell film application device according to any one of claims 1-11, characterized in that, The adhesive preparation unit includes: An unwinding spool, on which a first spool is fitted, the first spool being provided with a material strip covered with the protective film; A take-up shaft, on which a second take-up shaft is fitted, the second take-up shaft being used to wind the strip that removes the protective film; A main drive shaft is used to cooperate with the material belt to drive the material belt to move, so that the take-up shaft releases the material belt and the unwind shaft winds up the material belt. A detection component is used to detect when the protective film reaches the desired position. A film-dispensing assembly is used to push the protective film from the film-to-be-filmed position to the film-receiving position.

14. The battery cell film application device according to claim 13, characterized in that, The film-feeding assembly includes a wedge-shaped block pressed on the strip, the wedge-shaped block being movable along the thickness direction of the strip.

15. The battery cell film application device according to claim 13, characterized in that, The adhesive preparation unit also includes: A pressure block is located between the film feeding assembly and the unwinding shaft. The pressure block is in contact with the material strip and is movable along the thickness direction of the material strip. It is used to tighten the material strip when the protective film reaches the film-to-be-filmed position.

Images