Cutting and film-coating mechanism with double film-drawing rods

Abstract

The utility model relates to a double-film-drawing-rod cutting film wrapping mechanism which comprises a first film drawing rod assembly, a second film drawing rod assembly, a first film wrapping roller assembly and a second film wrapping roller assembly. The first film-drawing rod assembly is provided with a first film-drawing rod, and the second film-drawing rod assembly is provided with a second film-drawing rod. The first film-drawing rod assembly and the second film-drawing rod assembly are the same and each comprise an air cylinder installation plate and a pushing frame. The pushing frame is connected with a linear driving mechanism extending in the vertical direction on the rack and used for driving the first film pulling rod assembly and the second film pulling rod assembly to move up and down and achieving position switching between the film taking station and the film wrapping station. The film coating mechanism adopts two sets of film drawing mechanisms, the blue film is cut off before film coating, and the upper and lower film drawing rods move towards the battery cell at the same time during film coating, so that the tension states of the upper and lower blue films are consistent, the state of the blue films is more stable during film coating, the probability that strip-shaped bubbles are formed at the final fitting section of the blue film is reduced to a great extent, and the production qualification rate of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery core shell processing, in particular to a double-drawn film rod cutting and wrapping film mechanism. Background Art

[0002] In the lithium battery industry, cell wrapping is crucial, directly determining the appearance quality and insulation performance of the cell. This mechanism typically consists of a single film-pulling rod, driven by a servo motor, pulling the film to the desired length. This ensures that the dimensions of the lamination area and the overlapped area coincide during wrapping, preventing the film from being too long or too short, which could result in a substandard cell.

[0003] During the wrapping process, the blue film is bonded to the battery cell on two surfaces, the upper and lower surfaces. The blue film bonded on the upper surface is connected to the constant tension structure, and the blue film is flattened and bonded relatively ideally; the blue film bonded on the lower surface is connected to the film pulling rod, and the results on both sides are inconsistent. The tension state of the blue film on the lower side is quite different from that of the blue film on the upper side, resulting in the formation of strip bubbles at the final bonding edge. Utility Model Content

[0004] The purpose of the utility model is to provide a double-drawn film rod cutting and wrapping mechanism, aiming to overcome the problem that the tension state of the lower blue film is quite different from that of the upper blue film, resulting in the formation of strip bubbles at the edge of the battery cell.

[0005] To this end, the utility model proposes a double-film-pulling-rod cutting and wrapping mechanism, comprising a film-pulling-rod assembly 1, a film-pulling-rod assembly 2, a film-wrapping roller assembly 1, and a film-wrapping roller assembly 2; the film-pulling-rod assembly 1 comprises a film-pulling-rod 1, and the film-pulling-rod assembly 2 comprises a film-pulling-rod 2; and the film-pulling-rod assembly 1 and the film-pulling-rod assembly 2 are the same, both comprising a cylinder mounting plate and a pushing frame;

[0006] Both ends of the film-pulling rod 1 or the film-pulling rod 2 are installed on a pair of the pushing frames, and the pushing frames are connected to a linear driving mechanism extending in the vertical direction on the frame, and are used to drive the film-pulling rod assembly 1 and the film-pulling rod assembly 2 to move up and down, and realize the position switching between the film-taking station and the film-wrapping station;

[0007] The cylinder mounting plate is installed on one side of the input end of the pushing frame, and a horizontally arranged horizontal telescopic cylinder is installed on the cylinder mounting plate, which is used to drive the film pulling rod 1 to stick to the blue film, and a cutter assembly is provided above the film pulling rod 1 to cut the blue film according to the specified length; the horizontal side of the film pulling rod assembly 2 is provided with a pushing assembly for pushing the battery cell forward, and the film coating roller assembly 1 and the film coating roller assembly 2 are arranged on the other horizontal side of the film pulling rod assembly 2 to flatten the blue film and press it on the upper and lower surfaces and a vertical side surface of the battery cell.

[0008] As a preferred technical solution of the present application, a toothed plate is installed on the inner side of the pushing frame, and the toothed plate is connected to the servo motor through a vertically extending synchronous belt.

[0009] As a preferred technical solution of the present application, a slider mounting plate and a slider are provided on the inner side of the pushing frame, and the slider cooperates with a sliding guide rail installed on the frame and extending in a vertical direction.

[0010] As a preferred technical solution of the present application, the film-pulling rod assembly 1 and the film-pulling rod assembly 2 are further provided with a synchronous belt 2 respectively; the film-pulling rod 1 or the film-pulling rod 2 is connected to the servo motor through the synchronous belt 2.

[0011] As a preferred technical solution of the present application, the film-pulling rod assembly 1 and the film-pulling rod assembly 2 are further provided with an electromagnetic clutch respectively; the rotation angle of the film-pulling rod 1 or the film-pulling rod 2 is controlled by the electromagnetic clutch.

[0012] As a preferred technical solution of the present application, the second film-pulling rod assembly comprises the cylinder mounting plate and a horizontally arranged horizontal telescopic cylinder, which drives the second film-pulling rod to move toward the input end, so that the blue film is in an inclined state.

[0013] As a preferred technical solution of the present application, a film pressing roller assembly is provided on a horizontal side of the film pulling rod assembly, and the film pressing roller assembly has a second pressure plate; the second pressure plate and the film pulling rod are located on both sides of the blue film and have corresponding heights.

[0014] As an optimal technical solution of the present application, the film pressing roller assembly also includes a film pressing rod and a pressure plate 1; the film pressing rod is located above the film pulling rod 1, and the pressure plate 1 and the film pressing rod are located on both sides of the blue film and have corresponding heights.

[0015] As a preferred technical solution of the present application, a front auxiliary roller assembly is provided behind the pushing assembly, and the rollers provided on the front auxiliary roller assembly are distributed on the upper and lower sides of the battery core.

[0016] As a preferred technical solution of the present application, the coating roller assembly 1 and the coating roller assembly 2 are respectively driven by a group of servo motors to move vertically.

[0017] The double film-pulling rod cutting and wrapping mechanism provided by the utility model adopts two sets of film-pulling mechanisms, which cuts the blue film before wrapping. During wrapping, the upper and lower film-pulling rods move toward the battery cell at the same time, so that the tension states of the upper and lower blue films are consistent. The state of the blue film is more stable during wrapping, which greatly reduces the probability of strip-shaped bubbles forming in the final bonding section of the blue film and improves the production qualification rate of the equipment.

[0018] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0020] Figure 1 This is a structural diagram of the double-drawn film-cutting and film-wrapping mechanism of the present invention;

[0021] Figure 2 This is an axonometric view of the film-pulling rod assembly in the double-film-pulling rod film-cutting and wrapping mechanism of the present invention;

[0022] Figure 3 This is a partial enlargement of the film pulling rod assembly in the double film pulling rod cutting and wrapping mechanism of the utility model. Figure 1 ;

[0023] Figure 4 This is a partial enlargement of the film pulling rod assembly in the double film pulling rod cutting and wrapping mechanism of the utility model. Figure 2 ;

[0024] Figure 5 It is a structural diagram of the double-pulling film rod cutting and wrapping mechanism of the present invention when taking out the film;

[0025] Figure 6 This is a schematic diagram of the structure of the double film-pulling rod cutting the side of the film wrapping mechanism of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the double-drawn film-cutting and wrapping mechanism of the present invention when wrapping the entire surface;

[0027] Description of Reference Numerals

[0028] 1. Pushing assembly; 2. Front auxiliary roller assembly; 3. Film pulling rod assembly 1; 4. Film pulling rod assembly 2; 5. Cutter assembly; 6. Film coating roller assembly 1; 7. Film coating roller assembly 2; 8. Film pressing roller assembly; 9. Battery cell; 10. Blue film; 31. Film pulling rod 1; 32. Slider mounting plate; 33. Cylinder mounting plate; 34. Pushing frame; 35. Electromagnetic clutch; 36. Slider; 37. Synchronous belt 2; 38. Gear plate; 41. Film pulling rod 2; 81. Film pressing rod; 82. Pressing plate 1; 83. Pressing plate 2. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] like Figures 1 to 3 As shown, the utility model is a double film-pulling rod cutting and wrapping mechanism, which mainly includes a pushing component 1, a front auxiliary roller component 2, a film-pulling rod component 1 3, a film-pulling rod component 2 4, a cutting knife component 5, a film-wrapping roller component 1 6, a film-wrapping roller component 2 7, etc.

[0031] Among them, the front auxiliary roller assembly 2 and the pushing assembly 1 are located at the input end of the double-pulling film rod cutting and wrapping mechanism. The two cooperate to limit the position of the battery cell 9 and play a positioning role; the rollers set on the front auxiliary roller assembly 2 are distributed on the upper and lower sides of the battery cell 9.

[0032] The film pulling rod assembly 1 3 and the film pulling rod assembly 2 4 cooperate with each other to transport the blue film 10, and are respectively driven by a servo motor to move the synchronous belt 1, and then the film pulling rod assembly is driven to move vertically through the synchronous belt 1; the cutter assembly 5 is responsible for cutting the blue film according to the specified length, and is driven by the cylinder; the film coating roller assembly 1 6 and the film coating roller assembly 2 7 flatten the blue film 10 and press it onto the surface of the battery cell. The film coating roller assembly 1 6 and the film coating roller assembly 2 7 are each driven by a group of servo motors and move vertically.

[0033] like Figure 3 、 Figure 4 As shown, the film-pulling rod assembly 3 comprises a film-pulling rod 31, a slider mounting plate 32, a cylinder mounting plate 33, a pusher frame 34, and an electromagnetic clutch 35. The ends of the film-pulling rod 31 are mounted on a pair of pushers 34 and are connected to a servo motor via a synchronous belt 37. The electromagnetic clutch 35 controls the rotation angle.

[0034] The slider mounting plate 32 is installed on the inner side of the pushing frame 34, and a slider 36 is provided on the slider mounting plate 32. The slider 36 cooperates with a sliding guide rail installed on the frame and extending in the vertical direction; at the same time, a clamping tooth plate 38 is installed on the inner side of the pushing frame 34, which is used to be fixedly connected to a vertically extending synchronous belt, thereby driving the film pulling rod assembly 3 to move up and down through the servo motor.

[0035] A cylinder mounting plate 33 is installed on the pushing frame 34 near the front auxiliary roller assembly 2. A horizontal telescopic cylinder is installed on the cylinder mounting plate 33, and the telescopic direction of the horizontal telescopic cylinder is parallel to the moving direction of the battery cell 9, which is used to drive the film pulling rod assembly 3 to move horizontally.

[0036] A film lamination roller assembly 8 and a cutter assembly 5 are installed on the horizontal side of the film-drawing rod assembly 3. The lamination roller assembly 8 includes a lamination rod 81, a first pressing plate 82, and a second pressing plate 83. The lamination rod 81 is located above the film-drawing rod 31 and on the same side of the blue film 10. The first pressing plate 82 and the second pressing plate 83 are located on the other side of the blue film 10. The first pressing plate 82 and the second pressing plate 83 are at the same height as the lamination rod 81 and the film-drawing rod 31, respectively. The lamination roller assembly 8 and the cutter assembly 5 achieve shearing of the blue film 10.

[0037] The structure of the film pulling rod assembly 2 4 is the same as that of the film pulling rod assembly 1 3. The film pulling rod assembly 2 4 has a film pulling rod 2 41, and also has components such as a slider mounting plate 32, a cylinder mounting plate 33, a pushing frame 34, and an electromagnetic clutch 35. The horizontal telescopic cylinder horizontally arranged on the film pulling rod assembly 2 4 drives the film pulling rod 2 41 to move toward the input end, so that the blue film 10 is in an inclined state.

[0038] It should be noted that the linear drive mechanism used to drive the vertical movement of film-pulling rod assembly 1 3 and film-pulling rod assembly 2 4 can also be other mechanisms, such as an electric cylinder, a pneumatic cylinder, a servo screw mechanism, or a servo slide. When film-pulling rod assembly 1 3 and film-pulling rod assembly 2 4 use a servo slide, the slider mounting plate 32 and slider 36 can be omitted from the push frame 34.

[0039] The following combination Figures 5 to 7 Briefly describe the working process of the double-drawn film-rod film cutting and wrapping mechanism of the present invention.

[0040] The film taking action of the film wrapping mechanism is: the horizontal telescopic cylinder extends to drive the film pulling rod 31 to move forward to support the pressure plate 2 83, and pushes the film pulling rod 31 to the adhesion position with the blue film 10. After the blue film is adhered, the cylinder retracts, and the cutter assembly 5 cuts the blue film 10. Then the servo motor drives the film pulling rod assembly 2 4 and the film pulling rod assembly 1 3 to move downward as a whole through the synchronous belt 1; at the same time, the pushing assembly 1 and the front auxiliary roller assembly 2 push the battery cell 9 to move inward and close to the blue film.

[0041] During film wrapping, the first cylinder of the film pulling rod assembly extends to send the blue film to the front, the second cylinder of the film pulling rod remains stationary, the blue film is in an inclined state, and the film wrapping roller assembly moves upward to complete the side lamination; the film wrapping roller assembly remains stationary, and the pushing assembly pushes the battery cell forward for film wrapping. At this time, the first and second film pulling rod assemblies move toward the battery cell at a uniform speed at the same time to wrap the film, thereby achieving control of the upper and lower blue films and improving the production qualification rate.

[0042] During production, the structure realizes controllable wrapping of both upper and lower blue films through the up and down movement of two sets of film pulling rods. The blue film is subjected to more uniform force during wrapping. The extension of a single cylinder can tilt the blue film, making it easy to exhaust the side and improving the production qualification rate.

[0043] Among them, the above-mentioned film wrapping mechanism can be parameterized to match the feasibility of different film wrapping speeds according to different production film wrapping speeds; the film cutting mechanism can also be designed to be away from the film pulling rod according to the required rhythm of the production line, and the cut blue film can be moved to the film pulling rod to meet higher production capacity.

[0044] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A double-drawn film rod cutting and wrapping mechanism, characterized in that: include: Film pulling rod assembly 1 (3), film pulling rod assembly 2 (4), film coating roller assembly 1 (6) and film coating roller assembly 2 (7); The film-pulling rod assembly 1 (3) has a film-pulling rod 1 (31), and the film-pulling rod assembly 2 (4) has a film-pulling rod 2 (41); and the film-pulling rod assembly 1 (3) and the film-pulling rod assembly 2 (4) are the same, both including a cylinder mounting plate (33) and a pushing frame (34); Both ends of the film-pulling rod 1 (31) or the film-pulling rod 2 (41) are mounted on a pair of pushing frames (34), and the pushing frames (34) are connected to a linear driving mechanism extending in a vertical direction on the frame, and are used to drive the film-pulling rod assembly 1 (3) and the film-pulling rod assembly 2 (4) to move up and down, and realize position switching between the film-taking station and the film-wrapping station; The cylinder mounting plate (33) is mounted on one side of the input end of the pushing frame (34), and a horizontally arranged telescopic cylinder is mounted on the cylinder mounting plate (33) for driving the film-pulling rod (31) to be close to the blue film (10), and a cutter assembly (5) is provided above the film-pulling rod (31) for shearing the blue film (10) according to a specified length; A pushing assembly (1) for pushing the battery cell (9) forward is provided on one horizontal side of the film-pulling rod assembly (4), and the film-wrapping roller assembly (6) and the film-wrapping roller assembly (7) are provided on the other horizontal side of the film-pulling rod assembly (4) to flatten and press the blue film (10) onto the upper and lower surfaces and a vertical side surface of the battery cell (9).

2. The double-drawn film rod cutting and wrapping mechanism according to claim 1, characterized in that: A toothed plate (38) is installed inside the pushing frame (34), and the toothed plate (38) is connected to the servo motor through a vertically extending synchronous belt.

3. The double-drawn film rod cutting and wrapping mechanism according to claim 2, characterized in that: A slider mounting plate (32) and a slider (36) are provided on the inner side of the pushing frame (34), and the slider (36) cooperates with a sliding guide rail installed on the frame and extending in a vertical direction.

4. The double-drawn film rod cutting and wrapping mechanism according to claim 1, characterized in that: The film-pulling rod assembly 1 (3) and the film-pulling rod assembly 2 (4) are also respectively provided with a synchronous belt 2 (37); the film-pulling rod 1 (31) or the film-pulling rod 2 (41) is connected to the servo motor through the synchronous belt 2 (37).

5. The double-drawn film rod cutting and wrapping mechanism according to claim 4, characterized in that: The film-pulling rod assembly 1 (3) and the film-pulling rod assembly 2 (4) are also respectively provided with an electromagnetic clutch (35); the film-pulling rod 1 (31) or the film-pulling rod 2 (41) is controlled in rotation angle by the electromagnetic clutch (35).

6. The double-drawn film rod cutting and wrapping mechanism according to claim 1, characterized in that: The second film pulling rod assembly (4) comprises the cylinder mounting plate (33) and a horizontally arranged telescopic cylinder, which drives the second film pulling rod (41) to move toward the input end, so that the blue film (10) is in an inclined state.

7. The double-drawn film rod cutting and wrapping mechanism according to claim 1, characterized in that: A film pressing roller assembly (8) is provided on a horizontal side of the film pulling rod assembly (3), and the film pressing roller assembly (8) has a second pressing plate (83); the second pressing plate (83) and the film pulling rod (31) are located on both sides of the blue film (10) and have corresponding heights.

8. The double-drawn film rod cutting and wrapping mechanism according to claim 7, characterized in that: The film pressing roller assembly (8) also includes a film pressing rod (81) and a pressure plate (82); the film pressing rod (81) is located above the film pulling rod (31), and the pressure plate (82) and the film pressing rod (81) are located on both sides of the blue film (10) and have corresponding heights.

9. The double-drawn film rod cutting and wrapping mechanism according to claim 1, characterized in that: A front auxiliary roller assembly (2) is provided behind the pushing assembly (1), and rollers provided on the front auxiliary roller assembly (2) are distributed on the upper and lower sides of the battery core (9).

10. The double-drawn film rod cutting and wrapping mechanism according to claim 1, characterized in that: The coating roller assembly 1 (6) and the coating roller assembly 2 (7) are respectively driven by a group of servo motors to move vertically.

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