Arc path-based protective film peeling method and battery film tearing machine

Abstract

The application discloses a protection film peeling method based on an arc-shaped path and a battery film tearing machine. The method comprises the following steps: controlling a trimming mechanism to trim the protection film attached to the surface of the battery cell to form a tearable part on the protection film; controlling a grabbing part to grab the tearable part; controlling the grabbing part to perform an opening action to make the protection film partially separate from the surface of the battery cell; and controlling the grabbing part to move along a preset film tearing path to peel the protection film from the surface of the battery cell. The film tearing path is an arc-shaped movement path. The battery film tearing machine is used to perform the protection film peeling method based on the arc-shaped path.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to a protective film peeling method based on an arc path and a battery film peeling machine. Background Technology

[0002] During battery production, a protective film is applied to the incoming battery cells, or after processing, before the cells are transferred to the next process. To ensure smooth battery processing, this protective film needs to be removed. However, currently, this removal is mostly done manually, requiring operators to peel off the film covering the cell surface. This manual method has several drawbacks: firstly, it is inefficient and cannot meet the demands of large-scale production; secondly, uneven force applied during manual peeling can easily lead to film breakage or damage to the cell surface, affecting subsequent packaging quality and product yield. Therefore, how to efficiently and reliably remove the protective film is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a protective film peeling method and a battery film peeling machine based on an arc-shaped path, which can realize automated peeling of the protective film, improve production efficiency, and ensure the consistency of peeling quality.

[0004] In a first aspect, the protective film peeling method based on an arc-shaped path according to an embodiment of the present invention includes the following steps: The control cutting mechanism cuts the protective film attached to the surface of the battery cell to form an easy-tear part on the protective film that can be gripped; The gripping unit is controlled to grip the easily tearable part; The gripping part is controlled to perform an edge-opening action, causing the protective film to partially detach from the surface of the battery cell; The gripping part is controlled to move along a preset film-peeling path to peel the protective film off the surface of the battery cell. The film-tearing path is an arc-shaped motion path.

[0005] The protective film peeling method based on an arc-shaped path according to an embodiment of the present invention further includes a step of acquiring location information, wherein acquiring the location information includes at least one of the following: Obtain the edge position information of the protective film; Obtain the location information of the easy-tear section; Obtain the location information of the partially detached protective film portion; And / or, The negative pressure generator generates negative pressure through the adsorption holes set on the support platform to adsorb and fix the battery cell on the support platform. The adsorption and fixing operation continues from the time the battery cell is placed on the support platform until the protective film is completely peeled off from the surface of the battery cell. And / or, Before the protective film on the battery cell is peeled off, the battery cell is subjected to pressure treatment; And / or, The tear-off portion is located at the edge of the protective film; And / or, The protective film has a bag-like structure.

[0006] According to the protective film peeling method based on arc path according to the present invention, obtaining the edge position information of the protective film includes: controlling an orthogonal polarization imaging system to acquire an edge image of the protective film, and performing edge detection processing on the image to identify the edge position of the protective film; And / or, Obtaining the position information of the tear-off part includes: determining the theoretical position of the tear-off part in the coordinate system of the bearing platform based on the motion trajectory and / or cutting parameters of the cutting mechanism when performing the cutting operation; And / or, Obtaining the location information of the partially detached protective film portion includes at least one of the following: Based on the real-time movement trajectory of the gripping unit when performing the edge-opening action, the position of the protective film portion that has been partially detached is estimated; A secondary image of the membrane edge after opening is performed using an orthogonal polarization imaging system, and the spatial location of the partially detached protective membrane portion is determined through image recognition.

[0007] According to the protective film peeling method based on an arc path according to an embodiment of the present invention, controlling the gripping part to perform the edge-opening action includes: controlling the adsorption member to pick up the easy-tear part and / or the edge of the protective film near the easy-tear part from the surface of the battery cell, so that the protective film is partially separated from the surface of the battery cell; And / or, It also includes: after controlling the gripping part to perform the edge-opening action or during the process of controlling the gripping part to move along the film-tearing path, while the adsorption member is in an adsorbed state, controlling the clamping member to move to the vicinity of the adsorption member and clamping the protective film portion that has partially detached from the surface of the battery cell.

[0008] According to the protective film peeling method based on an arc-shaped path according to an embodiment of the present invention, controlling the gripping part to move along a preset film peeling path includes: controlling the gripping part to perform curved motion in a vertical plane to form the arc-shaped motion path.

[0009] According to an embodiment of the present invention, the protective film peeling method based on an arc-shaped path includes an edge-opening section and a peeling section. In the edge-opening section, the gripping part performs the edge-opening action to partially detach the protective film from the surface of the battery cell. In the peeling section, the gripping part continues to move along the arc-shaped direction to completely peel the protective film from the surface of the battery cell.

[0010] According to the protective film peeling method based on an arc path according to an embodiment of the present invention, controlling the cutting mechanism to cut the protective film attached to the surface of the battery cell includes: controlling the relative movement of the support platform and / or the cutting component to switch the edge of the protective film to be cut to the cutting station.

[0011] According to the protective film peeling method based on an arc path according to an embodiment of the present invention, controlling the relative movement of the support platform and / or the cutting component includes: controlling the support platform to rotate to switch the edge of the protective film to be cut to the cutting station; or, Controlling the relative movement of the support platform and / or the cutting assembly includes: controlling the movement of the cutting assembly to switch to the station where the edge of the protective film to be cut is located.

[0012] According to the protective film peeling method based on the arc path of the present invention, the control of the cutting mechanism to cut the protective film attached to the surface of the battery cell further includes: controlling two cutting components disposed on adjacent or opposite sides of the support platform to cut the two adjacent or opposite sides of the protective film at the same time. And / or, It also includes: controlling the recycling drive to move the gripping part to the collection position, and controlling the gripping part to release the peeled protective film; And / or, It also includes: controlling the transfer device to transport the cut battery cells to the workstations that perform gripping, edge splitting and peeling processes.

[0013] According to the protective film peeling method based on an arc path according to an embodiment of the present invention, obtaining the position information of the easy-tear part further includes: obtaining the position information of the electrode tab of the battery cell, and determining the position of the easy-tear part according to the position information of the electrode tab, so that the easy-tear part avoids the area where the electrode tab is located; And / or, Based on the rotational capability of the gripping part and / or the carrying platform, the rotational drive is controlled to rotate the gripping part and / or the carrying platform so that the gripping part corresponds to the position of the easy-tear part.

[0014] The protective film peeling method based on an arc-shaped path according to embodiments of the present invention has at least the following beneficial effects: By setting the film-tearing path to an arc-shaped motion path, the gripping part simulates the natural action of manually peeling the film from one end and lifting it off smoothly during the film-tearing process. The film is peeled off the surface of the battery cell in a state similar to "peeling" rather than "pulling," avoiding the problems of film tearing, deformation, or damage to the surface of the battery cell that may be caused by straight pulling, making the film-tearing action more gentle and smooth. At the same time, the easy-tearable part is pre-formed through the edge-cutting step, creating conditions for subsequent gripping and film-tearing, realizing the automation of the film-tearing process, significantly improving production efficiency, reducing labor intensity, and ensuring the consistency of film-tearing quality.

[0015] Secondly, according to an embodiment of the present invention, a battery film peeling machine is used to perform the above-described protective film peeling method based on an arc path, including: The cutting mechanism is used to cut the protective film attached to the surface of the battery cell to form an easy-tear part on the protective film that can be gripped. A film-peeling mechanism is provided at one end of the cutting mechanism. The film-peeling mechanism includes a support platform and a film-peeling assembly. The support platform is used to support the battery cell with a protective film attached to its surface. The film-peeling assembly includes a gripping part corresponding to the tearable part on the protective film. The gripping part can grip the tearable part on the protective film and can be driven to move along a preset film-peeling path to peel the protective film off the surface of the battery cell. The controller is electrically connected to the cutting mechanism and the film-peeling mechanism. The controller is configured to control the cutting mechanism to perform a cutting operation to form an easy-tear part, and to control the gripping part to grip the easy-tear part and perform an edge-opening action and a peeling action along an arc-shaped motion path to peel the protective film from the surface of the battery cell.

[0016] According to an embodiment of the present invention, a battery film-peeling machine is provided upstream of the edge-cutting mechanism, the pressure-applying mechanism being used to apply pressure to each surface of the battery cell.

[0017] The battery protective film peeling machine according to embodiments of the present invention has at least the following beneficial effects: by integrating the edge-cutting mechanism and the film-peeling mechanism into one unit, a fully automated processing system from edge-cutting to film peeling is constructed. The edge-cutting mechanism automatically forms an easy-to-peel section before film peeling, creating precise gripping conditions for subsequent film peeling processes. Combined with the highly efficient automated film peeling capability of the film peeling mechanism, it can completely replace manual operation, realize the full automation of the battery protective film processing process, significantly improve production efficiency, reduce labor costs, and ensure a high degree of consistency in the film peeling quality of each battery cell through standardized and automated operation methods, significantly improving the product yield and the overall reliability of the production line.

[0018] Additional aspects and advantages of the 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

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a diagram showing the main steps of the protective film peeling method based on an arc path according to an embodiment of the present invention; Figure 2 This is a flowchart illustrating the steps of the protective film peeling method based on an arc-shaped path according to an embodiment of the present invention. Figure 3 This is a structural diagram of a battery film peeling machine according to an embodiment of the present invention; Figure 4 This is a structural diagram of the battery film-peeling machine according to an embodiment of the present invention, specifically regarding the film-peeling assembly. Figure 5 This is a structural diagram of the gripping part of the battery film peeling machine according to an embodiment of the present invention; Figure 6 This is a structural diagram of the battery film-peeling machine according to an embodiment of the present invention, showing the supporting platform and positioning mechanism. Figure 7 This is a structural diagram of the battery film peeling machine according to an embodiment of the present invention regarding the support platform; Figure 8 This is a structural diagram of the battery film peeling machine according to an embodiment of the present invention, specifically regarding the cutting mechanism. Figure 9 This is a structural diagram of the battery film peeling machine according to an embodiment of the present invention regarding the cutting component; Explanation of reference numerals in the attached figures: Support platform 100; Adsorption hole 110; Second matching part 120; Film-tearing assembly 200; gripping part 210; first support 211; adsorption component 212; clamping component 213; third lifting drive component 214; First lifting drive component 220; First translation drive component 230; Clamping block 300; First matching part 310; Component 400; Drive unit 410; Recycling box 420; Cutting assembly 500; cutting bracket 510; lower support 520; upper cutter 530; cutting drive 540; Rotating component 600; First translation module 700; First lifting module 800; Second translation module 900. Detailed Implementation

[0020] Embodiments of the present invention 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 the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] In the description of the invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. If the terms "first" and "second" are used, they are only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] Reference Figures 1 to 2 This invention provides a protective film peeling method based on an arc-shaped path, applied to a battery film peeling machine. Specifically, the method includes the following steps: The control cutting mechanism cuts the protective film attached to the surface of the battery cell to form an easy-tear part on the protective film that can be gripped; The control gripping unit 210 grips the easy-tear part; the control gripping unit 210 performs the edge-opening action, causing the protective film to partially detach from the surface of the battery cell; The gripping unit 210 is controlled to move along a preset film-peeling path to peel the protective film off the surface of the battery cell. The film-tearing path is an arc-shaped motion path.

[0025] Understandably, the controller first controls the cutting mechanism to cut the protective film attached to the surface of the battery cell, forming an easy-tear section at the edge or a predetermined position of the protective film for subsequent gripping. Then, the controller controls the gripping part 210 to move to the location of the easy-tear section and grasp it. After successful gripping, the controller controls the gripping part 210 to perform an edge-opening action, causing the protective film to partially detach from the battery cell surface near the gripping point, creating conditions for subsequent film peeling. Finally, the controller controls the gripping part 210 to move along a preset arc-shaped motion path, completely peeling the protective film from the battery cell surface. Throughout the process, the film-peeling path is designed as an arc-shaped motion path, simulating the natural action of manually peeling the film by lifting it from one end and then gently lifting it. This allows the film to be peeled off in a state similar to "peeling" rather than "pulling," effectively avoiding the problems of film tearing, deformation, or damage to the battery cell surface that may occur with straight-line pulling, making the film-peeling action gentler and smoother.

[0026] In some embodiments, a negative pressure generator is controlled to generate negative pressure through adsorption holes 110 disposed on the support platform 100 to adsorb and fix the battery cell onto the support platform 100. The adsorption and fixing operation continues from the time the battery cell is placed on the support platform 100 until the protective film is completely peeled off from the surface of the battery cell. And / or, the easy-tear portion is located at the edge of the protective film.

[0027] Understandably, the controller controls the negative pressure generator to generate negative pressure through the adsorption holes 110 on the support platform 100, adsorbing and fixing the battery cell onto the support platform 100. This adsorption and fixing operation continues from the moment the battery cell is placed on the support platform 100 until the protective film is completely peeled off the surface of the battery cell. This continuous adsorption fixing method ensures that the battery cell remains in a stable position throughout the entire edge cutting, edge opening, and film peeling process, and will not be displaced or shaken due to external forces, thus ensuring the execution accuracy of each process. At the same time, the negative pressure adsorption method does not exert mechanical clamping force on the surface of the battery cell, avoiding clamping damage, and is particularly suitable for battery cells with protective films on their surfaces.

[0028] Before peeling off the protective film from the battery cell, the cell is pressurized to ensure a tighter bond between the internal materials, thereby improving battery performance. It's important to note that the easy-tear section is located at the edge of the protective film. Positioning the easy-tear section at the edge allows the gripping unit 210 to peel the film from the edge, conforming to the natural tearing process and facilitating a smooth, arc-shaped tearing action. Furthermore, the edge location of the easy-tear section is easily formed through cutting, facilitating subsequent inspection and positioning.

[0029] It should be noted that the protective film in this application is a bag-type structure. The bag-type protective film wraps around the outside of the battery cell, forming a closed or semi-closed bag shape, with the top surface and part of the sides of the battery cell covered by the film. For the bag-type protective film, the cutting mechanism needs to cut the edge of the bag opening or the junction of the top and sides of the film to be peeled, forming an easy-tear portion on the top surface film. After the gripping part 210 grips the easy-tear portion, it peels the bag-type protective film covering the outside of the battery cell from the battery cell surface through an arc-shaped motion path. During the peeling process of the bag-type protective film, due to its strong integrity and potential adhesion to the sides of the battery cell, the gentle peeling characteristics of the arc-shaped motion path are particularly important. This effectively avoids the film from tearing or remaining on the battery cell surface due to pulling, ensuring complete exposure of the battery cell surface.

[0030] In some embodiments, the method further includes a step of obtaining location information, wherein obtaining the location information includes at least one of the following: Obtain the edge position information of the protective film; Obtain the location information of the easy-tear section; Obtain the location information of the partially detached protective film portion.

[0031] Understandably, the step of acquiring position information can be implemented in various ways. When acquiring the edge position information of the protective film, the controller obtains the precise position of the protective film edge through a detection system to guide the cutting mechanism to accurately align with the edge to be cut. When acquiring the position information of the tear-off portion, the controller obtains the precise position of the tear-off portion formed after cutting to guide the gripping unit 210 to accurately grip the tear-off portion. When acquiring the position information of the partially detached protective film portion, the controller obtains the precise position of the detached film after the edge is opened to guide the clamping member 213 to accurately clamp it. Acquiring this position information can be implemented individually or in combination to improve the execution accuracy of each step.

[0032] Specifically, obtaining the edge position information of the protective film includes: controlling the orthogonal polarization imaging system to acquire edge images of the protective film, and performing edge detection processing on the images to identify the edge position of the protective film.

[0033] Obtaining the position information of the easy-tear part includes: determining the theoretical position of the easy-tear part in the coordinate system of the bearing platform 100 based on the motion trajectory and / or cutting parameters of the cutting mechanism when performing the cutting operation.

[0034] Obtaining the location information of the partially detached protective film portion includes at least one of the following: Based on the real-time motion trajectory of the gripping unit 210 when performing the edge-opening action, the position of the protective film portion that has been partially detached is estimated; A secondary image of the membrane edge after opening is performed using an orthogonal polarization imaging system, and the spatial location of the partially detached protective membrane portion is determined through image recognition.

[0035] Understandably, this application provides multiple methods for accurately acquiring positional information for protective films made of transparent and colorless materials. When an orthogonal polarization imaging system is used to acquire edge images, its working principle is as follows: light emitted from the light source becomes linearly polarized after passing through a first polarizer, illuminating the edge region of the protective film. Because the protective film is optically isotropic, the vibration direction of the linearly polarized light passing through the film remains unchanged and is blocked by a second polarizer, forming a dark area; while light propagating inside the film and exiting from the side of the film edge loses its polarization characteristics and is not blocked by the second polarizer, appearing as a bright area in the image. Thus, the bright outline of the protective film's edge can be clearly presented against a dark background, achieving accurate identification of the transparent film's edge position. Edge detection processing is performed on the acquired image; for example, using the Canny algorithm, the pixel positions of the protective film's edge can be accurately extracted, and the actual spatial position can be obtained through coordinate transformation.

[0036] When the position information of the tearable part is obtained, the theoretical position of the tearable part in the coordinate system of the support platform 100 can be determined based on the motion trajectory and cutting parameters of the cutting mechanism during the cutting operation. Since the cutting mechanism performs the cutting according to a preset program, the controller can record the position coordinates of the tearable part formed by the cutting for subsequent gripping. This method requires no additional detection and is simple to implement.

[0037] When acquiring the location information of the partially detached protective film, two methods can be used: One is to estimate the location of the partially detached protective film based on the real-time motion trajectory of the gripping unit 210 during the edge-opening action. Since the edge-opening action is performed by the gripping unit 210, and the control system records the real-time motion trajectory of the gripping unit 210, the location of the detached film can be directly estimated from the current position of the gripping unit 210 after the edge-opening action is completed. The other method is to perform secondary imaging of the film edge after edge opening using an orthogonal polarized light imaging system, and determine the spatial location of the partially detached protective film through image recognition. Because the film has partially detached from the cell surface, its edge morphology differs from its adhesion state, presenting more obvious features in the image, allowing for precise positioning through image recognition.

[0038] In some embodiments, controlling the gripping part 210 to perform the edge-opening action includes controlling the adsorption member 212 to pick up the easy-tear part and / or the edge of the protective film near the easy-tear part from the surface of the battery cell, so that the protective film is partially separated from the surface of the battery cell.

[0039] It is understandable that the specific implementation of the edge-opening action includes various possibilities. When the adsorption component 212 picks up the edge of the protective film, or the area near the tear-off portion, from the surface of the battery cell, the adsorption component 212 (such as a vacuum chuck) generates negative pressure to hold the film in place, and then partially detaches the film from the surface of the battery cell through a small lifting motion. This adsorption-based edge-opening method does not damage the film and the action is gentle.

[0040] In some embodiments, after the gripping part 210 performs the edge-opening action or during the movement of the gripping part 210 along the film-tearing path, while the adsorption member 212 remains adsorbed, the clamping member 213 moves to the vicinity of the adsorption member 212 and clamps the protective film portion that has partially detached from the surface of the battery cell.

[0041] Understandably, after the edge-opening action or during the film-tearing process, while the adsorption member 212 remains adsorbed, the controller controls the clamping member 213 to move to the vicinity of the adsorption member 212 and clamp the partially detached protective film portion. This collaborative working mode of "adsorption positioning + clamping fixation" involves the adsorption member 212 first performing the edge-opening action and adsorbing the detached film edge, thus determining the film position. The clamping member 213 then moves to the vicinity of the adsorption member 212 and clamps the film while the adsorption member 212 remains adsorbed. This method avoids the difficulty of the clamping member 213 independently finding the film position. Furthermore, the clamping method can withstand greater tearing force than the adsorption method, ensuring that the film will not accidentally detach before complete tearing, greatly improving the success rate and reliability of film tearing.

[0042] In some embodiments, controlling the gripping part 210 to move along a preset film-tearing path includes controlling the gripping part 210 to perform curved motion in a vertical plane to form an arc-shaped motion path.

[0043] It is understandable that the arc-shaped motion path is achieved through curved motion within a vertical plane. Driven by the controller, the gripper 210 moves along a preset curved trajectory, which can be a circular arc, an elliptical arc, or other smooth curve. This curved motion can be achieved through a combination of the lifting drive and the translation drive. For example, while the first lifting drive 220 raises the gripper 210, the first translation drive 230 moves the gripper 210 horizontally; the combined motion trajectory of these two components constitutes the desired arc-shaped path.

[0044] Furthermore, the arc-shaped motion path includes an edge-opening section and a peeling section. In the edge-opening section, the gripping part 210 performs an edge-opening action to partially detach the protective film from the surface of the battery cell. In the peeling section, the gripping part 210 continues to move along the arc-shaped direction to completely peel the protective film from the surface of the battery cell.

[0045] Understandably, the arc-shaped motion path is divided into two continuous sections: an edge-opening section and a peeling section. In the edge-opening section, the gripping unit 210 performs an edge-opening action, causing the protective film to partially detach from the cell surface near the starting point. Subsequently, in the peeling section, the gripping unit 210 continues to move along the arc direction, gradually peeling the partially detached protective film completely from the cell surface. This segmented design allows the edge-opening and peeling actions to be completed within the same continuous motion path, resulting in smooth and natural movements, avoiding the unsmoothness caused by pauses or switching. The edge-opening section is typically located at the beginning of the arc-shaped path, with a smaller amplitude of movement, primarily aimed at establishing the initial detachment area; the peeling section occupies the main part of the path, with a larger amplitude of movement, completing the entire film-peeling process.

[0046] Furthermore, obtaining the position information of the tearable part also includes: obtaining the position information of the battery cell's tabs, and determining the position of the tearable part based on the position information of the tabs, so that the tearable part avoids the area where the tabs are located.

[0047] Since the battery cell tabs are critical components, if the gripping part 210 or the tearing path touches the tabs during the film-tearing process, it may cause damage or deformation to the tabs, affecting the battery cell performance. Therefore, when determining the location of the easy-tear section, the controller first obtains the position information of the battery cell tabs. This information can be obtained through a vision inspection system or pre-stored in the control system based on the battery cell's model parameters. Based on the tab position information, the controller places the easy-tear section in an area far away from the tabs, ensuring that subsequent gripping and film-tearing operations will not interfere with the tabs.

[0048] Furthermore, based on the rotational capability of the gripping part 210 and / or the support platform 100, the rotational drive is controlled to rotate the gripping part 210 and / or the support platform 100 so that the gripping part 210 corresponds to the position of the tear-off part.

[0049] In actual equipment, the rotation configuration of the gripping unit 210 and the supporting platform 100 can be varied: when the gripping unit 210 has rotational capability but the supporting platform 100 does not, the controller controls the rotation drive to rotate the gripping unit 210 to an angle corresponding to the tearable part; when the gripping unit 210 does not have rotational capability but the supporting platform 100 does, the controller controls the rotation drive to rotate the supporting platform 100, causing the tearable part on the battery cell to rotate to a position corresponding to the gripping unit 210; when both the gripping unit 210 and the supporting platform 100 have rotational capability, the controller can select to control one of them to rotate or both to rotate together, according to actual needs, to achieve optimal alignment between the gripping unit 210 and the tearable part. The rotation drive can be a rotary cylinder, a servo motor-driven rotary table, or a divider, etc., to achieve precise angle control. This flexible rotation configuration ensures that the gripping unit 210 can accurately grip the tearable part under different equipment structures, improving the adaptability and reliability of the equipment.

[0050] In some embodiments, controlling the cutting mechanism to cut the protective film attached to the surface of the battery cell includes: controlling the relative movement of the support platform 100 and / or the cutting assembly 500 to switch the edge of the protective film to be cut to the cutting station.

[0051] Understandably, when the edge-cutting mechanism performs cutting, the edges to be cut are switched through the relative movement of the support platform 100 and the cutting component 500. This relative movement can be achieved by rotating the support platform 100, moving the cutting component 500, or a combination of both. Through this relative movement, the various edges of the battery cell to be cut can be sequentially or simultaneously sent to the cutting station of the cutting component 500, achieving automated multi-sided cutting without the need for manual flipping and adjustment, significantly improving cutting efficiency.

[0052] Furthermore, controlling the relative movement of the carrier platform 100 and / or the cutting assembly 500 includes controlling the carrier platform 100 to rotate to switch the edge of the protective film to be cut to the cutting station.

[0053] Alternatively, in another embodiment, controlling the relative movement of the support platform 100 and / or the cutting component 500 includes controlling the cutting component 500 to move to switch to the station where the edge of the protective film to be cut is located.

[0054] Understandably, this application provides two specific methods for implementing relative motion. One method involves rotating the support platform 100 to switch the edge to be cut. For example, a rotating component 600 is placed below the support platform 100, and a controller controls the rotating component 600 to drive the support platform 100 to rotate by a preset angle, sequentially sending different edges of the battery cell to the fixed cutting component 500 for cutting. This method is simple in structure and easy to control. The other method involves moving the cutting component 500 to switch to the position of the edge to be cut. For example, the cutting component 500 is placed on the rotating component 600, and a controller controls the rotating component 600 to drive the cutting component 500 to move to the position of the different edges of the battery cell for cutting. This method is suitable for scenarios where the support platform 100 is fixed and offers high flexibility.

[0055] In some embodiments, controlling the cutting mechanism to cut the protective film attached to the surface of the battery cell further includes controlling two cutting components 500 disposed on adjacent or opposite sides of the support platform 100 to cut two adjacent or opposite sides of the protective film simultaneously.

[0056] It is understandable that when controlling two cutting components 500 to cut simultaneously, the two cutting components 500 can be positioned on adjacent sides (L-shaped arrangement) or opposite sides (opposite arrangement) of the support platform 100. The controller controls the two cutting components 500 to cut two adjacent sides or two opposite sides of the battery cell simultaneously. For example, when four sides need to be cut, the two cutting components 500 can be positioned opposite each other. First, two opposite sides are cut, then the support platform 100 is rotated 90 degrees to cut the other two opposite sides. By setting the two cutting components 500 to work together, two sides can be cut at a time, further improving cutting efficiency.

[0057] In some embodiments, the control recovery drive 410 drives the gripping part 210 to move to the collection position, and controls the gripping part 210 to release the protective film that has been peeled off.

[0058] Understandably, when the recycling drive unit 410 moves the gripping unit 210 to the collection position, after the gripping unit 210 successfully tears the protective film completely off the battery cell, it still holds or adsorbs the waste film. At this time, the recycling drive unit 410 starts, moving the gripping unit 210 from the film-tearing station to above or at the entrance of the recycling bin 420. Then, the gripping unit 210 releases the film, allowing it to fall into the recycling bin 420, completing the automatic collection of the waste film. Afterward, the recycling drive unit 410 brings the gripping unit 210 back to the film-tearing station, preparing for the next film tearing. This step achieves full automation of film tearing and waste film collection, eliminating the need for manual intervention to clean the waste film, further improving the automation level and production efficiency of the production line, and maintaining a clean working environment.

[0059] In some embodiments, the control transfer device transports the cut battery cells to the workstation where gripping, edge-opening and peeling processes are performed.

[0060] Understandably, when the control transfer device transports the cut battery cells to the workstations performing gripping, edge-opening, and peeling processes, the transfer device (such as a linear module, conveyor belt, or robotic arm) drives the carrier platform 100 to move between the edge-cutting station and the film-peeling station, realizing the automatic flow of battery cells between different workstations and ensuring the continuity and stability of the production cycle. In a preferred embodiment, the carrier platform 100 is configured to be shared between the edge-cutting station and the film-peeling station; that is, after the carrier platform 100 completes the cutting task at the edge-cutting station, it is directly transported by the transfer device to the film-peeling station to continue to be used as a fixing fixture to support the battery cells for film peeling. This design avoids secondary transfer and repositioning of the battery cells, which not only simplifies the equipment structure but also improves production efficiency and production cycle.

[0061] In another embodiment, this application provides a battery film peeling machine, which is an automated device designed to perform the aforementioned protective film peeling method based on an arc path. It organically integrates functional modules such as edge cutting, film peeling, transfer, recycling and detection to form a complete operation system from battery cell feeding to waste film recycling.

[0062] Reference Figures 3 to 9 The following is a detailed description of the battery film peeling machine according to an embodiment of the present invention.

[0063] The entire operation process begins with the placement of the battery cell. After the battery cell with its protective film attached is fed into the equipment, it first arrives at the support platform 100. This support platform 100 plays a crucial role in the entire system; it not only supports the battery cell during the edge-cutting process but also carries it to the film-peeling station. Therefore, it is designed to be shared between the edge-cutting and film-peeling stations. The platform 100 has numerous suction holes 110 distributed across its surface. These suction holes 110 are connected to a negative pressure generator via internal piping. Once the battery cell is in place, the controller activates the negative pressure generator, causing the suction holes 110 to continuously generate negative pressure, firmly adhering the battery cell to the platform. This adsorption and fixation operation continues from the moment the battery cell is placed until the protective film is completely peeled off, ensuring that the battery cell remains completely still throughout the entire processing.

[0064] The support platform 100 is not fixed; a rotating component 600 is installed beneath it. This rotating component 600 is precisely controlled by a controller, allowing the support platform 100 to rotate around its vertical axis by a preset angle. When multiple edges of the battery cell need to be cut, the rotating component 600 comes into play, sequentially rotating the different edges of the battery cell to be cut to the cutting station. Furthermore, the support platform 100 can be connected to a second lifting component to adjust the platform's vertical height to accommodate battery cells of different thicknesses or to match the height of the cutting component 500.

[0065] Arranged around the support platform 100 is the core execution part of the edge-cutting mechanism—the cutting assembly 500. The cutting assembly 500 is used to remove the edges of the protective film on the surface of the battery cell, thus forming an easy-tear section for subsequent gripping. Each cutting assembly 500 includes a cutting bracket 510, and a lower support 520 and an upper cutter 530 arranged vertically opposite each other. During cutting, the lower support 520 supports the edge of the battery cell from below, while the upper cutter 530 is driven by a cutting drive 540, moving towards or away from the lower support 520, neatly removing the protective film through a shearing action. The cutting drive 540 can be a cylinder, hydraulic cylinder, or linear motor, and its movement is precisely controlled by a controller.

[0066] To accommodate battery cells of different sizes and achieve precise alignment, the cutting assembly 500 is also equipped with an adjustment mechanism. The first translation module 700 and the first lifting module 800 are interconnected, and the cutting assembly 500 is connected to the first translation module 700. The first translation module 700 moves the cutting assembly 500 horizontally, aligning it with the edge of the battery cell; the first lifting module 800 adjusts the vertical position of the cutting assembly 500, ensuring that the upper cutter 530 accurately cuts into the protective film without damaging the battery cell. Through the cooperation of these two components, the cutting assembly 500 can perform fine-tuning in both the horizontal and vertical directions.

[0067] In configurations seeking higher efficiency, the edge-cutting mechanism can be equipped with two cutting components 500. These two cutting components 500 can be positioned on adjacent sides of the support platform 100 in an L-shape, simultaneously cutting two adjacent sides of the battery cell; alternatively, they can be positioned on opposite sides of the support platform 100, facing each other, simultaneously cutting two opposite sides of the battery cell. The controller coordinates the two cutting components 500 to work together. After each cutting of two sides, the rotation component 600 rotates the support platform 100 to cut the remaining edges, thereby significantly improving cutting efficiency.

[0068] Once the cutting process is complete, the battery cells need to be transferred to the film-peeling station. At this point, the transfer mechanism begins operation. The transfer mechanism is actually the second translation module 900, on which the support platform 100 is mounted. The controller controls the second translation module 900 to drive the support platform 100 to move horizontally, transporting the support platform 100 along with the cut battery cells from the cutting station to the film-peeling station. Because the support platform 100 is designed to be shared, the battery cells do not require secondary transfer and repositioning and directly enter the film-peeling preparation state.

[0069] After the support platform 100 enters the film-tearing station, it first needs to be fixed to ensure the stability of the film-tearing process. The positioning component undertakes this task. The positioning component includes two opposing clamping blocks 300, located at both ends of the support platform 100. The controller controls the clamping block 300 drive to drive the two clamping blocks 300 to move towards each other, tightly clamping the support platform 100 from both ends.

[0070] It is worth noting that a precise positioning structure is provided between the clamping block 300 and the support platform 100. This positioning structure consists of a first mating part 310 on the clamping block 300 and a second mating part 120 on the support platform 100, both of which are serrated structures that can be interlocked. When the clamping block 300 moves towards the support platform 100 under drive, the serrations on the clamping block 300 gradually approach and eventually mesh with the serrations on the support platform 100. This serrated meshing forms a very strong fit, ensuring that the precise position of the clamping block 300 relative to the support platform 100 will not shift during the clamping process. The serrated positioning structure has both self-locking and guiding functions: the self-locking function makes it difficult to loosen once clamping is completed, and it can withstand the lateral force from the battery cell during the film tearing process, preventing the clamping block 300 from shifting due to force; the guiding function ensures that the clamping block 300 can accurately return to the predetermined position each time it is clamped, greatly improving the repeatability of positioning. This design not only achieves clamping and fixing but also fundamentally enhances the stability and reliability of the clamping, providing a solid foundation for the subsequent film-tearing action. After the film is torn, the clamping block 300 moves in a controlled opposite direction to release the supporting platform 100, facilitating its removal.

[0071] After the support platform 100 is reliably secured, the film-peeling assembly 200 begins to perform its core task. The film-peeling assembly 200 is positioned above the support platform 100, and its core component is the gripping part 210. The gripping part 210 includes a first support 211, and an adsorption member 212 and a clamping member 213 mounted on the first support 211. Both the adsorption member 212 and the clamping member 213 are oriented towards the support platform 100 to facilitate contact with the protective film.

[0072] The adsorption component 212 typically employs a suction cup or negative pressure nozzle to grasp the easily tearable portion and perform the edge-opening action. To enhance the flexibility and adaptability of the gripping component 210's movement, the adsorption component 212 is not directly fixed to the first support 211, but is connected to the first support 211 via a third lifting drive component 214. The third lifting drive component 214 can drive the adsorption component 212 to move independently vertically, moving away from or closer to the support platform 100. When it is necessary to grasp the easily tearable portion, the controller first controls the third lifting drive component 214 to drive the adsorption component 212 downward, ensuring good contact with the membrane; after successful adsorption, the adsorption component 212 can be driven slightly upward to partially detach the membrane from the cell surface, completing the edge-opening action; during the subsequent film-tearing process, the lifting height of the adsorption component 212 can also be dynamically adjusted according to actual needs to optimize the film-tearing effect, for example, appropriately raising it to increase the peeling angle when encountering areas with strong adhesion. This independent lifting capability allows the adsorption element 212 to be flexibly adjusted according to the real-time status of the membrane, greatly improving the adaptability of the gripping part 210 to protective films of different materials and different adhesive strengths.

[0073] The clamping component 213 is mounted on the same side as the adsorption component 212 and is used to clamp the partially detached protective film portion during the film tearing process. The clamping component 213 can be a pneumatic gripper or an electric gripper, and is equipped with clamping detection sensors. These sensors can be gripper position sensors, pressure sensors, or photoelectric sensors, used to provide real-time feedback on the clamping status. When the adsorption component 212 completes the edge-opening action and maintains adsorption, the controller controls the clamping component 213 to move to the vicinity of the adsorption component 212, clamping the detached protective film portion while the adsorption component 212 maintains adsorption. This coordinated mode of "adsorption positioning + clamping fixation" utilizes both the flexibility of adsorption and the stability of clamping, ensuring the reliable operation of the film tearing process.

[0074] The movement of the gripping unit 210 is achieved by a drive system. The drive system includes a first lifting drive 220 and a first translation drive 230. The first lifting drive 220 drives the gripping unit 210 to move vertically, and the first translation drive 230 drives the gripping unit 210 to move horizontally. The controller coordinates and controls these two drive units according to a preset program, so that the combined motion trajectory of the gripping unit 210 forms the required arc-shaped film-tearing path. This arc-shaped path is typically divided into an edge-opening section and a peeling section: in the edge-opening section, the gripping unit 210 performs an edge-opening action, causing the protective film to partially detach; in the peeling section, the gripping unit 210 continues to move along the arc direction, completely peeling the protective film from the surface of the battery cell. This arc-shaped path simulates the natural action of manually tearing the film by lifting it from one end and then peeling it off, avoiding the film tearing or battery cell damage that may be caused by straight-line pulling.

[0075] After the gripping unit 210 successfully tears the protective film completely off the battery cell, it still holds the waste film. At this point, the recycling mechanism begins to operate. The recycling mechanism includes a recycling drive unit 410 and a recycling bin 420. The recycling drive unit 410 is connected to the gripping unit 210 and can be a linear module or a swing arm mechanism. The recycling bin 420 is located on one side of the film-tearing assembly 200. The controller controls the recycling drive unit 410 to move the gripping unit 210 from the film-tearing station to above the recycling bin 420, and then controls the gripping unit 210 to release the waste film, allowing it to fall into the recycling bin 420. Subsequently, the recycling drive unit 410 brings the gripping unit 210 back to the film-tearing station, ready for the next film tearing operation. This automatic recycling function completely eliminates the hassle of manually cleaning up waste film, maintaining a clean working environment.

[0076] In the entire automated process, accurate position detection is crucial to ensuring the smooth operation of each step. Therefore, the equipment is equipped with a detection system, especially for transparent and colorless protective films. The detection system employs the principle of orthogonal polarization imaging, including a light source, a first polarizer, a second polarizer, and an image acquisition unit. The light source is positioned below the support platform 100 or on the back side of the battery cell. The first polarizer is positioned on the light-emitting side of the light source to generate linearly polarized light. The second polarizer and the image acquisition unit are positioned above the support platform 100, with the polarization axis of the second polarizer perpendicular to that of the first polarizer. During operation, the linearly polarized light emitted by the light source illuminates the protective film. Light passing through the film is blocked by the second polarizer, forming a dark area, while light emitted from the side edges of the film loses its polarization characteristics and is not blocked, appearing as a bright area in the image, thus clearly revealing the edge contour of the protective film. The image acquisition unit transmits the acquired image to the controller, which uses edge detection algorithms such as the Canny operator to process the image, extracting the position information of the protective film's edges, easily tearable parts, or parts that have detached from the film, and converting the pixel positions into actual spatial coordinates to guide cutting, gripping, and clamping actions.

[0077] Finally, as the brain of the entire device, the controller is electrically connected to all the aforementioned mechanisms, including the drive components, sensors, negative pressure generator, and image acquisition unit. The controller has a complete pre-set control program that coordinates the sequence of actions, movement trajectories, and timing of each component based on the set process flow and real-time feedback signals. From cell adsorption, platform rotation, adjustment of the cutting component 500, and movement of the gripping part 210, to the transfer by the carrying platform 100, clamping by the positioning component, and movement of the recycling component 400, all stages are carried out smoothly under the unified scheduling of the controller, ensuring that the entire film-tearing process is completed automatically, efficiently, stably, and reliably.

[0078] Furthermore, by installing a pressurizing mechanism upstream of the cutting mechanism, the battery cell is placed within the sealed space of the pressurizing mechanism and subjected to hydrostatic pressure, resulting in a tighter and more compact bonding of the materials within the battery cell, thereby improving battery performance. The battery film-peeling machine provided in this application integrates an edge-cutting mechanism, a film-peeling mechanism, a transfer mechanism, a recycling mechanism, a detection system, and a controller, constructing a fully functional and highly automated protective film processing system. The close cooperation between these mechanisms ensures the high efficiency, stability, and reliability of the film-peeling process, completely replacing manual operation and significantly improving production efficiency and product quality.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," 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 invention. In this specification, the 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.

[0080] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A protective film peeling method based on an arc-shaped path, characterized in that, Includes the following steps: The control cutting mechanism cuts the protective film attached to the surface of the battery cell to form an easy-tear part on the protective film that can be gripped; The control gripping unit (210) grips the tearable part; The gripping part (210) is controlled to perform an edge-opening action, causing the protective film to partially detach from the surface of the battery cell; Control the gripping part (210) to move along a preset film-peeling path to peel the protective film off the surface of the battery cell; The film-tearing path is an arc-shaped motion path.

2. The protective film peeling method based on an arc-shaped path according to claim 1, characterized in that, It also includes a step of obtaining location information, wherein obtaining location information includes at least one of the following: Obtain the edge position information of the protective film; Obtain the location information of the easy-tear section; Obtain the location information of the partially detached protective film portion; And / or, The negative pressure generator generates negative pressure through the adsorption holes (110) set on the support platform (100) to adsorb and fix the battery cell on the support platform (100). The adsorption and fixing operation continues from the time the battery cell is placed on the support platform (100) until the protective film is peeled off from the surface of the battery cell. And / or, Before the protective film on the battery cell is peeled off, the battery cell is subjected to pressure treatment; And / or, The tear-off portion is located at the edge of the protective film; And / or, The protective film has a bag-like structure.

3. The protective film peeling method based on an arc-shaped path according to claim 2, characterized in that, Obtaining edge position information of the protective film includes: controlling the orthogonal polarization imaging system to acquire edge images of the protective film, and performing edge detection processing on the images to identify the edge position of the protective film; And / or, Obtaining the position information of the tearable part includes: determining the theoretical position of the tearable part in the coordinate system of the bearing platform (100) based on the motion trajectory and / or cutting parameters of the cutting mechanism when performing the cutting operation; And / or, Obtaining the location information of the partially detached protective film portion includes at least one of the following: Based on the real-time motion trajectory of the gripping unit (210) when performing the edge-opening action, the position of the protective film portion that has been partially detached is estimated; A secondary image of the membrane edge after opening is performed using an orthogonal polarization imaging system, and the spatial location of the partially detached protective membrane portion is determined through image recognition.

4. The protective film peeling method based on an arc-shaped path according to claim 3, characterized in that, Controlling the gripping part (210) to perform the edge-opening action includes controlling the adsorption member (212) to pick up the easy-tear part and / or the edge of the protective film near the easy-tear part from the surface of the battery cell, so that the protective film is partially separated from the surface of the battery cell; And / or, It also includes: after the gripping part (210) performs the edge-opening action or during the process of controlling the gripping part (210) to move along the film-tearing path, while the adsorption member (212) is in an adsorbed state, controlling the clamping member (213) to move to the vicinity of the adsorption member (212) and clamping the protective film portion that has partially detached from the surface of the battery cell.

5. The protective film peeling method based on an arc-shaped path according to any one of claims 1 to 4, characterized in that, Controlling the gripping part (210) to move along a preset film-tearing path includes controlling the gripping part (210) to perform curved motion in a vertical plane to form the arc-shaped motion path.

6. The protective film peeling method based on an arc-shaped path according to claim 5, characterized in that, The arc-shaped motion path includes an edge-opening section and a peeling section. In the edge-opening section, the gripping part (210) performs the edge-opening action to partially detach the protective film from the surface of the battery cell. In the peeling section, the gripping part (210) continues to move along the arc direction to completely peel the protective film from the surface of the battery cell.

7. The protective film peeling method based on an arc-shaped path according to claim 6, characterized in that, The control of the cutting mechanism to cut the protective film attached to the surface of the battery cell includes: controlling the relative movement of the support platform (100) and / or the cutting assembly (500) to switch the edge of the protective film to be cut to the cutting station.

8. The protective film peeling method based on an arc-shaped path according to claim 7, characterized in that, Controlling the relative movement of the carrier platform (100) and / or the cutting assembly (500) includes: controlling the carrier platform (100) to rotate to switch the edge of the protective film to be cut to the cutting station; or, Controlling the relative movement of the carrier platform (100) and / or the cutting assembly (500) includes: controlling the cutting assembly (500) to move to switch to the station where the edge of the protective film to be cut is located.

9. The protective film peeling method based on an arc-shaped path according to any one of claims 7 or 8, characterized in that, The control of the cutting mechanism to cut the protective film attached to the surface of the battery cell also includes: controlling two cutting components (500) located on adjacent or opposite sides of the support platform (100) to cut the two adjacent or opposite sides of the protective film at the same time; And / or, It also includes: controlling the recycling drive (410) to move the gripping part (210) to the collection position, and controlling the gripping part (210) to release the protective film that has been peeled off; And / or, It also includes: controlling the transfer device to transport the cut battery cells to the workstations that perform gripping, edge splitting and peeling processes.

10. The protective film peeling method based on an arc-shaped path according to claim 2, characterized in that, Obtaining the position information of the tear-off part also includes: obtaining the position information of the electrode tab of the battery cell, and determining the position of the tear-off part based on the position information of the electrode tab, so that the tear-off part avoids the area where the electrode tab is located; And / or, Based on the rotational capability of the gripping part (210) and / or the support platform (100), the rotational drive is controlled to rotate the gripping part (210) and / or the support platform (100) so that the gripping part (210) corresponds to the position of the tearable part.

11. A battery protective film peeling machine, used to perform the protective film peeling method based on an arc path as described in any one of claims 1 to 10, characterized in that, include: The cutting mechanism is used to cut the protective film attached to the surface of the battery cell to form an easy-tear part on the protective film that can be gripped. A film-tearing mechanism is disposed at one end of the cutting mechanism. The film-tearing mechanism includes a support platform (100) and a film-tearing assembly (200). The support platform (100) is used to support the battery cell with a protective film attached to its surface. The film-tearing assembly (200) includes a gripping part (210) corresponding to the tearable part on the protective film. The gripping part (210) can grip the tearable part on the protective film and can be driven to move along a preset film-tearing path to peel the protective film off the surface of the battery cell. The controller is electrically connected to the cutting mechanism and the film-peeling mechanism. The controller is configured to control the cutting mechanism to perform a cutting operation to form an easy-to-peel part, and to control the gripping part (210) to grip the easy-to-peel part and perform an edge-opening action and a peeling action along an arc-shaped motion path to peel the protective film from the surface of the battery cell.

12. The battery film peeling machine according to claim 11, characterized in that, A pressure-applying mechanism is provided upstream of the cutting mechanism, which is used to apply pressure to each surface of the battery cell.

Images