Battery cell coating apparatus

Abstract

The application discloses a kind of battery cell film wrapping devices, it is related to lithium battery technical field.The battery cell film wrapping device includes bottom plate and is set on the roller assembly, constraint component and scraper assembly of bottom plate, the bottom plate is used to place battery cell, the roller assembly is used to place blue film, the constraint component is movably connected with the bottom plate, for with the side wall of battery cell resistance, to constrain battery cell, the scraper assembly is movably connected with the bottom plate, can be contacted with the blue film attached to the surface of battery cell and relative to the bottom plate moves, to flatten the blue film.The battery cell film wrapping device can realize constraint to battery cell when film wrapping, improve the yield of mechanized film wrapping operation, can also be suitable for the film wrapping procedure of different sizes of battery cell, improve the compatibility of mechanized film wrapping operation, with the advantages of high production efficiency, less rework times, low production cost.

Description

Technical Field

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

[0002] In the lithium battery production process, the coating process after the cells are made is limited by the insufficient compatibility of existing coating equipment, leading to manual coating becoming the main operation method. Manual coating has the following drawbacks: First, the manual coating process is cumbersome and time-consuming, with the coating time for a single cell far exceeding the standard of automated mechanical operation, seriously dragging down the overall production rhythm. Coupled with the high rework rate, frequent secondary operations further delay the cycle of finished cells, making it difficult to guarantee the timeliness of production line delivery. In addition, the increased labor costs caused by long working hours and high rework rate exacerbate the production cost of lithium batteries. Second, it is difficult to standardize the manual coating operation. The coating process is prone to producing appearance defects such as bubbles and scratches, which not only directly affect the aesthetics of the cell surface, but may also pose potential threats to the performance and safety of the cell due to problems such as loose film adhesion and the presence of foreign objects. Utility Model Content

[0003] The purpose of this application is to provide a battery cell coating device that can constrain the battery cell during coating, thereby improving the yield of mechanized coating operations. It is also applicable to the coating process of battery cells of different sizes, improving the compatibility of mechanized coating operations, and has the advantages of high production efficiency, fewer rework cycles, and low production costs.

[0004] The embodiments of this application are implemented as follows:

[0005] A first aspect of this application provides a battery cell coating apparatus, including a base plate and a roller assembly, a constraint assembly, and a scraper assembly disposed on the base plate. The base plate is used to place the battery cell, the roller assembly is used to place the blue film, the constraint assembly is movably connected to the base plate and is used to abut against the side wall of the battery cell to constrain the battery cell, and the scraper assembly is movably connected to the base plate and can contact the blue film attached to the surface of the battery cell and move relative to the base plate to scrape the blue film flat. This battery cell coating apparatus can constrain the battery cell during coating, improving the yield of mechanized coating operations. It is also applicable to the coating process of battery cells of different sizes, improving the compatibility of mechanized coating operations, and has the advantages of high production efficiency, fewer rework cycles, and low production costs.

[0006] In one possible implementation, the roller assembly includes two first supports fixedly and spaced apart on the base plate and a roller rotatably mounted on the two first supports. The blue film is sleeved on the roller, one end of the blue film is fixedly connected to the roller, and the other end of the blue film is used to attach to the surface of the battery cell.

[0007] In one possible implementation, each of the two first supports is provided with a mounting part, and the two ends of the roller are respectively inserted into the mounting part.

[0008] In one possible implementation, the constraint assembly includes a lateral stop and a longitudinal stop. The extension direction of the lateral stop is parallel to the axial direction of the roller assembly, and the extension direction of the longitudinal stop is perpendicular to the axial direction of the roller assembly. A first connecting portion is provided on the base plate, and a second connecting portion is provided on both the lateral stop and the longitudinal stop. The first connecting portion and the second connecting portion can be locked by a locking member.

[0009] In one possible implementation, there are two lateral stops and two longitudinal stops. The two lateral stops are used to clamp the battery cell on opposite sides along the axial direction of the roller assembly, and the two longitudinal stops are used to clamp the battery cell on the other two sides along a direction perpendicular to the axial direction of the roller assembly.

[0010] In one possible implementation, the first connecting part is a through hole and / or a groove, and the second connecting part is a through hole and / or a groove. When the first connecting part and / or the second connecting part is a through hole, the number of through holes is multiple.

[0011] In one possible implementation, the scraper assembly includes two second supports that are slidably and spaced apart on the base plate and a scraper fixedly mounted on the two second supports. The scraper is located above the battery cell, and the orthographic projection of the battery cell on the base plate is located on the path along which the scraper slides relative to the base plate.

[0012] In one possible implementation, slide rails are provided on both sides of the base plate, and sliders are provided on both second brackets. The sliders are slidably disposed within the slide rails so that the second brackets are slidably connected to the base plate.

[0013] In one possible implementation, the top and bottom surfaces of the base plate are provided with slide rails, the slider is U-shaped, the two support arms of the U-shaped structure are slidably connected to the two slide rails respectively, and the connecting plate connecting the two support arms of the U-shaped structure is fixedly connected to the second bracket.

[0014] In one possible implementation, the extension direction of the slide rail is perpendicular to the axial direction of the roller assembly, and the extension direction of the scraper is parallel to the axial direction of the roller assembly.

[0015] The beneficial effects of the embodiments of this application include:

[0016] The battery cell coating device includes a base plate and a roller assembly, a constraint assembly, and a scraper assembly mounted on the base plate. The base plate is used to hold the battery cell, the roller assembly is used to hold the blue film, the constraint assembly is movably connected to the base plate and abuts against the side wall of the battery cell to constrain it, and the scraper assembly is movably connected to the base plate and can contact the blue film attached to the surface of the battery cell and move relative to the base plate to smooth the blue film. The battery cell coating device provided in this application avoids problems such as misalignment and wrinkles caused by the easy displacement of the battery cell in traditional manual coating by precisely positioning and fixing the battery cell through the constraint assembly; the mechanical smoothing action of the scraper assembly can effectively eliminate air bubbles and unevenness, significantly improving the adhesion quality of the blue film. The combination of the two greatly improves the yield of mechanized coating and reduces rework or scrap due to poor coating. Mechanized operation replaces the tedious process of traditional manual wrapping. The continuous film supply of the roller assembly, the rapid positioning of the constraint assembly, and the automatic leveling of the scraper assembly significantly shorten the wrapping time of a single battery cell, improve overall production efficiency, and reduce labor costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of the battery cell coating device provided in the embodiments of this application;

[0019] Figure 2 This is a second schematic diagram of the structure of the battery cell coating device provided in the embodiments of this application;

[0020] Figure 3 This is the third schematic diagram of the structure of the battery cell coating device provided in the embodiments of this application;

[0021] Figure 4 This is the fourth schematic diagram of the structure of the battery cell coating device provided in the embodiments of this application;

[0022] Figure 5 The fifth schematic diagram of the battery cell coating device provided in the embodiments of this application.

[0023] Icons: 100-Cell coating device; 10-Base plate; 11-First connecting part; 12-Slide rail; 20-Roller assembly; 21-First support; 22-Roller; 30-Constraint assembly; 31-Transverse stop; 32-Longitudinal stop; 33-Second connecting part; 34-Locking part; 40-Scraper assembly; 41-Second support; 411-Slider; 42-Scraper; 200-Cell; 300-Blue film. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "horizontal," "vertical," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. The terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Please refer to the reference. Figures 1 to 5This application provides a battery cell coating device 100, including a base plate 10 and a roller assembly 20, a constraint assembly 30, and a scraper assembly 40 disposed on the base plate 10. The base plate 10 is used to place the battery cell 200, the roller assembly 20 is used to place the blue film 300, the constraint assembly 30 is movably connected to the base plate 10 and is used to abut against the side wall of the battery cell 200 to constrain the battery cell 200, and the scraper assembly 40 is movably connected to the base plate 10 and can contact the blue film 300 attached to the surface of the battery cell 200 and move relative to the base plate 10 to scrape the blue film 300 flat. This battery cell coating device 100 can constrain the battery cell 200 during coating, improve the yield of mechanized coating operations, and is applicable to the coating process of battery cells 200 of different sizes, improving the compatibility of mechanized coating operations. It has the advantages of high production efficiency, fewer rework times, and low production costs.

[0028] It should be noted that the battery cell coating device 100 includes a base plate 10 and a roller assembly 20, a constraint assembly 30, and a scraper assembly 40 mounted on the base plate 10. The base plate 10 serves as the basic supporting component of the battery cell coating device 100, used to place the battery cells 200 to be coated, providing a stable operating platform for the entire coating process. The roller assembly 20 is responsible for placing the blue film 300, which is wound around the roller assembly 20 and released by the rotation of the roller assembly 20, providing a continuous material supply for coating. During the coating process, the roller assembly 20 can adjust the tension or rotation speed to ensure that the blue film 300 is output uniformly and stably.

[0029] The constraint component 30 is movably connected to the base plate 10 and is used to abut against the side wall of the battery cell 200, forming a fixed constraint on the battery cell 200. Specifically, the constraint component 30 is typically designed as a movable baffle or gripper structure, and its position can be adjusted manually or electrically to adapt to battery cells 200 of different lengths or widths. After the battery cell 200 is placed on the base plate 10, the constraint component 30 moves towards and abuts against the side wall of the battery cell 200, preventing the battery cell 200 from shifting or shaking during the coating process, and ensuring the accuracy of the coating position.

[0030] The scraper assembly 40 is also movably connected to the base plate 10, and its working end (such as a scraper 42 or a roller) can contact the blue film 300 attached to the surface of the battery cell 200. During the coating process, the scraper assembly 40 moves relative to the base plate 10 along the surface of the battery cell 200, and through physical squeezing or scraping, eliminates bubbles, wrinkles, or unevenness on the surface of the blue film 300, so that the blue film 300 is tightly and smoothly attached to the surface of the battery cell 200. The moving path and pressure of the scraper assembly 40 can be adjusted according to the size of the battery cell 200 and the coating requirements to ensure that the blue film 300 in different areas can be effectively scraped flat.

[0031] In summary, the battery cell coating device 100 provided in this application, through the precise positioning and fixing of the battery cell 200 by the constraint component 30, avoids problems such as misalignment and wrinkles of the blue film 300 caused by the easy displacement of the battery cell 200 in traditional manual coating; the mechanical scraping action of the scraper component 40 can effectively eliminate air bubbles and unevenness, significantly improving the adhesion quality of the blue film 300. The combination of the two greatly improves the yield of mechanized coating and reduces rework or scrap due to poor coating. Mechanized operation replaces the cumbersome process of traditional manual coating. The continuous film supply of the roller component 20, the rapid positioning of the constraint component 30, and the automatic scraping of the scraper component 40 greatly shorten the coating time of a single battery cell 200, improve overall production efficiency, and reduce labor costs.

[0032] As one possible implementation method, such as Figures 1 to 5 As shown, the roller assembly 20 includes two first supports 21 fixedly and spaced apart on the base plate 10 and a roller 22 rotatably mounted on the two first supports 21. A blue film 300 is sleeved on the roller 22. One end of the blue film 300 is fixedly connected to the roller 22, and the other end of the blue film 300 is used to attach to the surface of the battery cell 200.

[0033] It should be noted that the first bracket 21 consists of two fixed and spaced-apart support structures on the base plate 10. They are typically made of metal materials (such as aluminum alloy or steel) and have sufficient strength and rigidity to support the roller 22 and maintain its horizontal position. The spacing between the two brackets is designed according to the length of the roller 22 to ensure that the roller 22 can rotate stably without wobbling after installation.

[0034] The roller 22 is rotatably positioned between two first supports 21, and its two ends can be connected to the supports via bearings or bushings, allowing for flexible rotation. The blue film 300 is rolled up and sleeved on the outer surface of the roller 22. One end of the blue film 300 is fixedly connected to the roller 22 via adhesive, clamps, or other fixing methods, while the other end (free end) extends from the roller 22 and is used to attach it to the surface of the battery cell 200. When film coating is required, the operator or robotic arm pulls out the free end of the blue film 300 and attaches it to the starting position of the battery cell 200. Subsequently, by moving the battery cell 200 or the scraper assembly 40, the roller 22 is rotated to release the blue film 300, gradually covering the surface of the battery cell 200.

[0035] During the wrapping process, the rotational resistance of roller 22 must be kept uniform to avoid excessive tension on the blue film 300, which could lead to tearing, or insufficient tension, which could lead to wrinkles. Furthermore, a tension adjustment device (such as a damper or spring mechanism) can be installed to control the output speed and tension of the blue film 300 by adjusting the rotational resistance of roller 22, ensuring smooth adhesion of the blue film 300. By replacing rollers 22 with different diameters or lengths, blue films 300 of different widths or roll diameters can be accommodated, offering considerable flexibility.

[0036] As one possible implementation method, such as Figures 1 to 5 As shown, each of the two first supports 21 is provided with a mounting part, and the two ends of the roller 22 are respectively inserted into the mounting part.

[0037] It should be noted that the mounting part is an insertion structure set on the two first supports 21, typically a round hole, groove, or sleeve opened at the top of the support, the size of which precisely matches the shaft ends at both ends of the roller 22. The roller 22 has shaft ends (such as cylindrical shafts) machined at both ends to fit the mounting part. The roller 22 is rotatably connected to the support by directly inserting the shaft ends into the mounting part. This insertion method eliminates the need for additional bolts, nuts, or other fasteners; stable installation and flexible rotation of the roller 22 can be ensured through interference fit or clearance fit.

[0038] In practical applications, bearings (such as deep groove ball bearings) may be embedded in the mounting section. The roller 22 shaft head mates with the inner ring of the bearing to reduce rotational friction and improve the smoothness of roller 22 rotation. For scenarios requiring frequent disassembly and replacement of roller 22 (such as replacing different specifications of blue film rolls), the mounting section can be designed as an open structure (such as a U-groove). Disassembly and assembly can be quickly completed by simply pulling the roller 22 shaft head out of the mounting section or pushing it in, significantly shortening the changeover time.

[0039] As one possible implementation method, such as Figures 1 to 5 As shown, the constraint assembly 30 includes a transverse stop 31 and a longitudinal stop 32. The extension direction of the transverse stop 31 is parallel to the axial direction of the roller assembly 20, and the extension direction of the longitudinal stop 32 is perpendicular to the axial direction of the roller assembly 20. A first connecting part 11 is provided on the base plate 10, and a second connecting part 33 is provided on both the transverse stop 31 and the longitudinal stop 32. The first connecting part 11 and the second connecting part 33 can be locked by the locking member 34.

[0040] It should be noted that the lateral stop 31 extends parallel to the axial direction of the roller assembly 20, primarily limiting the displacement of the battery cell 200 in the lateral direction (i.e., perpendicular to the conveying direction of the blue film 300). The longitudinal stop 32 extends perpendicular to the axial direction of the roller assembly 20, thus limiting the displacement of the battery cell 200 in the longitudinal direction (i.e., the conveying direction of the blue film 300). Together, they form a two-dimensional constraint on the battery cell 200, ensuring its stability during the coating process and preventing displacement or shaking. This allows the blue film 300 to adhere accurately to the surface of the battery cell 200, reducing coating defects caused by positional deviations and improving product yield.

[0041] The first connecting portion 11 on the base plate 10 is locked to the second connecting portions 33 on the transverse stop 31 and the longitudinal stop 32 by locking members 34. This design makes the constraint assembly 30 adjustable. The first connecting portion 11 and the second connecting portion 33 can take various forms. For example, the first connecting portion 11 on the base plate 10 can be multiple screw holes distributed along the transverse and longitudinal directions, and the second connecting portions 33 on the transverse stop 31 and the longitudinal stop 32 can be elongated slotted holes. By cooperating with the slotted holes and screw holes at different positions, and locking them with locking members 34 such as bolts, the positions of the transverse stop 31 and the longitudinal stop 32 can be easily adjusted to accommodate battery cells 200 of different sizes.

[0042] As one possible implementation method, such as Figures 1 to 5 As shown, there are two transverse stops 31 and two longitudinal stops 32. The two transverse stops 31 are used to clamp the battery cell 200 on opposite sides along the axial direction of the roller assembly 20, and the two longitudinal stops 32 are used to clamp the battery cell 200 on the other two sides along the direction perpendicular to the axial direction of the roller assembly 20.

[0043] It should be noted that there are two lateral stops 31, distributed along the axial direction of the roller assembly 20 (i.e., perpendicular to the conveying direction of the blue film 300). They are located on opposite sides of the battery cell 200 (e.g., left and right sides), and restrict the displacement of the battery cell 200 in the lateral direction by applying pressure inward. The inner side of the lateral stops 31 is usually designed as a plane or curved surface that fits against the side of the battery cell 200 to increase the contact area and ensure stable clamping. For example, for a square battery cell 200, the inner side of the lateral stops 31 can be a plane; for a cylindrical battery cell 200, it can be designed as an arc-shaped groove.

[0044] There are also two longitudinal stops 32, but their extension direction is perpendicular to the axial direction of the roller assembly 20 (i.e., the conveying direction of the blue film 300). These two longitudinal stops 32 are located on the other two sides of the battery cell 200 (such as the front and rear ends), respectively, and prevent the battery cell 200 from sliding or tilting in the longitudinal direction by clamping it in the front and rear directions. The height of the transverse stops 31 and / or the longitudinal stops 32 can also be matched with the thickness of the battery cell 200 to ensure that the vertical movement of the battery cell 200 can be effectively restrained during the wrapping process.

[0045] In actual operation, the operator can adjust the positions of the transverse stop 31 and the longitudinal stop 32 according to the specific dimensions of the battery cell 200. For example, by cooperating with the first connecting part 11 on the base plate 10 and the second connecting part 33 on the stop, the transverse stop 31 can be moved to a position corresponding to the width of the battery cell 200, and then fixed with the locking part 34; similarly, the position of the longitudinal stop 32 can be adjusted to adapt to the length of the battery cell 200. When all stops are locked in place, the battery cell 200 is firmly fixed in the predetermined position on the base plate 10, ensuring the stability of the coating process.

[0046] The four-way clamping structure constrains the battery cell 200 in both the lateral and longitudinal dimensions. Compared to traditional single-sided or double-sided constraint methods, this more effectively prevents displacement and shaking of the battery cell 200 during the coating process. This significantly improves the bonding accuracy between the blue film 300 and the surface of the battery cell 200. Especially when processing irregularly shaped or ultra-thin battery cells 200, the four-way constraint can avoid wrinkles or bubbles caused by uneven stress, thus improving the coating quality.

[0047] The inner sides of the transverse stop 31 and the longitudinal stop 32 can be wrapped with a soft material (such as rubber, silicone, or polyurethane), which can provide sufficient friction to fix the battery cell 200 while avoiding scratches or indentations on the surface of the battery cell 200. This is especially important for the surface-sensitive lithium battery cell 200, as it can effectively reduce damage to the battery cell 200 caused by the packaging process and reduce the defect rate.

[0048] As one possible implementation method, such as Figures 1 to 5 As shown, the first connecting part 11 is a through hole and / or a sliding groove, and the second connecting part 33 is a through hole and / or a sliding groove. When the first connecting part 11 and / or the second connecting part 33 are through holes, the number of through holes is multiple.

[0049] It should be noted that the first connecting part 11 is provided on the base plate 10 and can be a through hole, a groove, or a combination of both. When the first connecting part 11 is a through hole, multiple through holes are arranged regularly in the transverse and longitudinal directions (such as in a matrix distribution) to form a positioning point array; when the first connecting part 11 is a groove, the groove can extend in the transverse or longitudinal direction to provide a continuous adjustment range. The second connecting part 33 is provided on the transverse stop 31 and the longitudinal stop 32, and can also be a through hole, a groove, or a combination of both. When the second connecting part 33 is a through hole, its diameter matches the through hole of the first connecting part 11 for inserting the locking member 34 (such as a bolt); when the second connecting part 33 is a groove, it is usually designed as a long strip to allow the locking member 34 to slide within the groove, achieving continuous position adjustment.

[0050] When both the first connecting part 11 and the second connecting part 33 are through holes, multi-level positioning of the stop can be achieved by selecting different combinations of through holes. For example, if the through hole of the second connecting part 33 of the transverse stop 31 is aligned with the through holes of different rows in the corresponding column on the base plate 10, the transverse stop 31 can be fixed in the desired position by passing a bolt through and tightening it.

[0051] When the first connecting part 11 or the second connecting part 33 is a slide groove, the locking member 34 (such as a T-bolt) can slide freely within the slide groove until it reaches the target position and is then tightened. This design allows the stop to be steplessly adjusted within the slide groove range, which is suitable for precisely matching the needs of different sized battery cells 200.

[0052] When the first connecting part 11 is a sliding groove and the second connecting part 33 is a through hole, the through hole can slide along the sliding groove and be locked; conversely, when the first connecting part 11 is a through hole and the second connecting part 33 is a sliding groove, the sliding groove can cover multiple through hole positions, providing a more flexible adjustment range.

[0053] As one possible implementation method, such as Figures 1 to 5 As shown, the scraper assembly 40 includes two second brackets 41 that are slidably and spaced apart on the base plate 10 and a scraper 42 that is fixedly mounted on the two second brackets 41. The scraper 42 is located above the battery cell 200, and the orthographic projection of the battery cell 200 on the base plate 10 is located on the path of the scraper 42 sliding relative to the base plate 10.

[0054] It should be noted that the second bracket 41 consists of two spaced-apart support structures on the base plate 10. They are connected to the base plate 10 via sliding mechanisms such as guide rails and sliders 411, and can move relative to the base plate 10 along a preset path (usually parallel to the conveying direction of the blue film 300). This sliding design allows the scraper assembly 40 to reciprocate above the cell 200 to cover the entire coating area. The spacing between the two second brackets 41 is adjusted according to the width of the cell 200 or the length of the scraper 42, ensuring that the scraper 42 can be stably installed and effectively act on the surface of the cell 200.

[0055] The scraper 42 is fixedly positioned between the two second supports 41, directly above the battery cell 200. Its bottom surface is typically designed as a flat working surface, and the material can be elastic materials such as silicone or polyurethane, or hard materials such as stainless steel, depending on the type of blue film 300 and the coating process requirements. When the blue film 300 is attached to the surface of the battery cell 200, as the scraper 42 moves with the second supports 41, its working surface contacts the blue film 300. By applying appropriate pressure and friction, air bubbles on the surface of the blue film 300 are squeezed out and wrinkles are smoothed, ensuring the blue film 300 adheres tightly to the battery cell 200.

[0056] The orthographic projection of the battery cell 200 onto the base plate 10 lies entirely within the sliding path of the scraper 42 relative to the base plate 10. This ensures that the scraper 42 can cover the entire surface of the battery cell 200, including edge areas, during its movement. By precisely controlling the range of movement and pressure of the scraper 42, comprehensive flattening of battery cells 200 of different sizes can be achieved, avoiding any untreated dead corners. Once one surface of the battery cell 200 is coated, the operator or robotic arm simply rotates or flips the battery cell 200 so that the other surface faces upwards, and the scraper assembly 40 returns to its initial position. The process is then repeated to achieve the coating operation on the other surfaces of the battery cell 200.

[0057] By adjusting the spacing and sliding path range of the second brackets 41, the same scraper assembly 40 can be applied to various specifications of battery cells 200. For example, for wider battery cells 200, the spacing of the second brackets 41 can be increased; for longer battery cells 200, the sliding path of the scraper 42 can be extended, thus achieving the versatility and flexibility of the equipment.

[0058] As one possible implementation method, such as Figures 1 to 5 As shown, slide rails 12 are provided on both sides of the base plate 10, and sliders 411 are provided on both second brackets 41. The sliders 411 are slidably disposed in the slide rails 12 so that the second brackets 41 are slidably connected to the base plate 10.

[0059] It should be noted that the slide rails 12 are symmetrically arranged on both sides of the base plate 10, and are usually linear guide rails, mostly made of aluminum alloy or stainless steel, with precision-machined surfaces to ensure flatness and wear resistance. The length of the slide rails 12 is designed according to the maximum movement range of the scraper assembly 40, ensuring that the scraper 42 can cover the coating area of ​​all specifications of battery cells 200. The sliders 411 are mounted on the bottom of the two second brackets 41, corresponding one-to-one with the slide rails 12. Ball bearings or rollers can be embedded inside the sliders 411 to form a rolling friction pair, allowing them to slide easily on the slide rails 12. The sliders 411 are fixed to the second brackets 41 by bolts or welding to ensure a rigid connection during the movement of the scraper 42.

[0060] When the blue film 300 needs to be leveled, the second bracket 41 of the scraper assembly 40 slides on the slide rail 12 via the slider 411, causing the scraper 42 to move linearly along the surface of the battery cell 200. The guiding function of the slide rail 12 ensures that the movement path of the scraper 42 is precise and controllable, avoiding deviation or wobbling; the design of the ball or roller converts sliding friction into rolling friction, significantly reducing friction and making the scraper 42 move more smoothly, while reducing wear and extending the life of the components. By changing the slide rail 12 of different lengths or adjusting the spacing of the sliders 411, this structure can be adapted to various sizes of battery cells 200 and scraper 42 specifications.

[0061] As one possible implementation method, such as Figures 1 to 5As shown, the top and bottom surfaces of the base plate 10 are provided with slide rails 12, the slider 411 has a U-shaped structure, the two support arms of the U-shaped structure are slidably connected to the two slide rails 12 respectively, and the connecting plate connecting the two support arms of the U-shaped structure is fixedly connected to the second bracket 41.

[0062] It should be noted that in the cell coating device 100, the sliding connection between the base plate 10 and the second support 41 adopts a structural design of double slide rails 12 on the top and bottom surfaces combined with a U-shaped slider 411. This three-dimensional constrained guiding method further improves the stability and accuracy of the scraper assembly 40's movement. When the scraper assembly 40 moves, the upper and lower support arms of the U-shaped slider 411 roll in the top and bottom slide rails 12 respectively, forming a "sandwich" clamping guide. This structure, by restricting the slider 411's degrees of freedom in the X-axis (i.e., the direction perpendicular to the blue film 300's conveying direction), Y-axis (i.e., the blue film 300's conveying direction), and Z-axis (i.e., the cell 200's thickness direction), ensures that the second support 41 can only move linearly along the slide rail 12 direction, completely eliminating the side-tipping or pitching swaying problems that may occur in traditional single-rail structures.

[0063] As one possible implementation method, such as Figures 1 to 5 As shown, the extension direction of the slide rail 12 is perpendicular to the axial direction of the roller assembly 20, and the extension direction of the scraper 42 is parallel to the axial direction of the roller assembly 20.

[0064] It should be noted that the extension direction of the slide rail 12 is perpendicular to the axial direction of the roller assembly 20 (i.e., the conveying direction of the blue film 300), meaning that the moving path of the scraper assembly 40 is orthogonal to the release direction of the blue film 300. For example, if the axial direction of the roller assembly 20 is left-right (i.e., transverse), then the slide rail 12 extends in the front-back direction (i.e., longitudinal), and the scraper assembly 40 can move back and forth longitudinally above the battery cell 200. This arrangement allows the scraper 42 to cover the entire surface of the battery cell 200, achieving complete flattening from the initial attachment end of the blue film 300 to its final end.

[0065] The scraper 42 extends parallel to the axial direction (i.e., laterally) of the roller assembly 20, and its length is typically greater than or equal to the width of the battery cell 200. When the scraper 42 moves along the slide rail 12 with the second support 41, the laterally extending scraper 42 can cover the entire lateral width of the battery cell 200 in one pass, preventing missed areas or unevenness. For example, for a battery cell 200 with a width of 150mm, the scraper 42 extends 160mm laterally, ensuring complete contact with the blue film 300 on the surface of the battery cell 200 during longitudinal movement.

[0066] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0067] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

Claims

1. A battery cell coating device, characterized in that, The device includes a base plate and a roller assembly, a constraint assembly, and a scraper assembly disposed on the base plate. The base plate is used to place the battery cell, the roller assembly is used to place the blue film, the constraint assembly is movably connected to the base plate and is used to abut against the side wall of the battery cell to constrain the battery cell, and the scraper assembly is movably connected to the base plate and can contact the blue film attached to the surface of the battery cell and move relative to the base plate to scrape the blue film flat.

2. The cell coating device according to claim 1, characterized in that, The roller assembly includes two first supports fixedly and spaced apart on the base plate and a roller rotatably mounted on the two first supports. The blue film is sleeved on the roller, one end of the blue film is fixedly connected to the roller, and the other end of the blue film is used to attach to the surface of the battery cell.

3. The cell coating device according to claim 2, characterized in that, Each of the two first supports is provided with a mounting part, and the two ends of the roller are respectively inserted into the mounting part.

4. The cell coating device according to claim 1, characterized in that, The constraint assembly includes a lateral stop and a longitudinal stop. The lateral stop extends in a direction parallel to the axial direction of the roller assembly, and the longitudinal stop extends in a direction perpendicular to the axial direction of the roller assembly. A first connecting portion is provided on the base plate, and a second connecting portion is provided on both the lateral stop and the longitudinal stop. The first connecting portion and the second connecting portion can be locked by a locking member.

5. The cell coating device according to claim 4, characterized in that, The number of the transverse stop and the number of the longitudinal stop are both two. The two transverse stop are used to clamp the battery cell on opposite sides along the axial direction of the roller assembly, and the two longitudinal stop are used to clamp the battery cell on the other two sides along a direction perpendicular to the axial direction of the roller assembly.

6. The cell coating apparatus according to claim 4, characterized in that, The first connecting part is a through hole and / or a sliding groove, and the second connecting part is a through hole and / or a sliding groove. When the first connecting part and / or the second connecting part is a through hole, the number of through holes is multiple.

7. The cell coating apparatus according to claim 1, characterized in that, The scraper assembly includes two second brackets that are slidably and spaced apart on the base plate and a scraper fixedly mounted on the two second brackets. The scraper is located above the battery cell, and the orthographic projection of the battery cell on the base plate is located on the path along which the scraper slides relative to the base plate.

8. The cell coating apparatus according to claim 7, characterized in that, The base plate is provided with slide rails on both sides, and each of the two second brackets is provided with a slider. The slider is slidably disposed in the slide rails so that the second bracket is slidably connected to the base plate.

9. The cell coating apparatus according to claim 8, characterized in that, The top and bottom surfaces of the base plate are provided with slide rails. The slider has a U-shaped structure. The two support arms of the U-shaped structure are slidably connected to the two slide rails respectively. The connecting plate connecting the two support arms of the U-shaped structure is fixedly connected to the second bracket.

10. The cell coating apparatus according to claim 8, characterized in that, The extension direction of the slide rail is perpendicular to the axial direction of the roller assembly, and the extension direction of the scraper is parallel to the axial direction of the roller assembly.

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