Battery edge folding device and battery film wrapping method

Abstract

The invention provides a battery edge folding device and a battery film wrapping method, and the battery edge folding device comprises a base mechanism; the feeding mechanism is movably mounted on the base mechanism; the tab edge film folding mechanism is arranged on the base mechanism; the long edge film folding mechanism is arranged on the base mechanism; and the tab edge film folding mechanism and the long edge film folding mechanism are arranged at an interval in the feeding direction of the feeding mechanism. According to the invention, the problems of simple and rough film coating mode and easy quality problem in the prior art are effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery coating equipment, and in particular to a battery folding device and a battery coating method. Background Art

[0002] The film of soft-pack lithium battery usually refers to aluminum plastic film (APF), which is the key packaging material of soft-pack lithium battery. With its unique structure and performance, aluminum plastic film provides excellent protection for lithium battery, and also has an important impact on the overall performance of battery. Aluminum plastic film usually consists of an outer layer (nylon or polyester layer), an adhesive layer, an intermediate aluminum foil layer, another adhesive layer and an inner layer (heat sealing layer, usually cast polypropylene CPP).

[0003] The battery needs to be folded during production. The existing folding equipment coats both sides of the battery at the same time. This coating method is relatively simple and rough, and may cause problems such as uneven coating and a large number of bubbles in the coating. Summary of the invention

[0004] A technical problem to be solved by the present application is that the encapsulation method of the prior art is simple and rough, and is prone to quality problems.

[0005] To solve the above technical problems, in the first aspect, an embodiment of the present application provides a battery folding device, comprising: a base mechanism; a feeding mechanism, which is movably mounted on the base mechanism; a pole ear film folding mechanism, which is arranged on the base mechanism; a long side film folding mechanism, which is arranged on the base mechanism; the pole ear film folding mechanism and the long side film folding mechanism are arranged at intervals along the feeding direction of the feeding mechanism.

[0006] In some embodiments, the folding ear membrane mechanism includes a folding ear mounting seat assembly, a first folding ear membrane assembly and a first positioning and clamping assembly. The first positioning and clamping assembly and the folding ear mounting seat assembly are respectively arranged on both sides of the feeding mechanism, and the first folding ear membrane assembly is movably arranged on the folding ear mounting seat assembly.

[0007] In some embodiments, the first folding ear membrane assembly includes a first cylinder, a first mounting plate structure, a second cylinder and a first rolling membrane structure, the cylinder seat of the first cylinder is mounted on the folding ear mounting seat assembly, the output end of the first cylinder is connected to the first mounting plate structure, the first mounting plate structure can be vertically movably mounted on the folding ear mounting seat assembly, the cylinder seat of the second cylinder is rotatably mounted on the side of the first mounting plate structure facing the first positioning and clamping assembly, the first rolling membrane structure is rotatably mounted on the side of the first mounting plate structure facing the first positioning and clamping assembly, and the output end of the second cylinder is rotatably connected to the non-working surface of the first rolling membrane structure.

[0008] In some embodiments, the first rolling membrane structure includes a first rolling membrane, the first rolling membrane includes an arcuate surface and a plane, and the output end of the second cylinder is rotatably connected to the arcuate surface.

[0009] In some embodiments, the folding ear membrane mechanism further includes a second folding ear membrane assembly, which is movably disposed on the folding ear mounting seat assembly and is located at the lower part of the first folding ear membrane assembly.

[0010] In some embodiments, the folded edge film mechanism includes a folded edge film mounting seat assembly, a first folded edge film assembly and a second positioning and clamping assembly. The second positioning and clamping assembly and the folded edge film mounting seat assembly are respectively arranged on both sides of the feeding mechanism, and the first folded edge film assembly is movably arranged on the folding ear edge mounting seat assembly.

[0011] In some embodiments, the first folded edge film assembly includes a third cylinder, a second mounting plate structure and a second rolling film structure. The cylinder seat of the third cylinder is installed on the folded edge film mounting seat assembly, the output end of the third cylinder is connected to the second mounting plate structure, the second mounting plate structure can be vertically movably installed on the folded edge film mounting seat assembly, and the second rolling film structure can be rotatably installed on the side of the second mounting plate structure facing the second positioning and clamping assembly.

[0012] In some embodiments, the folded edge film mechanism further includes a second folded edge film assembly, which is movably disposed on the folding ear edge mounting seat assembly, and the second folded edge film assembly is located at the lower side of the first folded edge film assembly.

[0013] According to another aspect of the present application, a battery film wrapping method is also provided. The battery film wrapping method adopts the above-mentioned battery folding device, and the battery film wrapping method includes the following steps: S10 a feeding mechanism feeds the material; S20 a folding ear edge film mechanism extrude the film at the first side corner of the battery from the horizontal direction to the vertical direction; S30 a folding long side film mechanism extrude the film at the second side corner of the battery, and the first side corner and the second side corner are arranged relatively to each other.

[0014] In some embodiments, the first cylinder and the second cylinder of the first folding ear membrane assembly move in coordination, and the axial movement of the second cylinder is converted into vertical movement and horizontal movement of the first rolling membrane structure.

[0015] Through the above technical solution, a battery folding device is provided, in which a feeding mechanism is used to feed the material, and the feeding mechanism sends the battery to the folding ear edge membrane mechanism for folding, and then the feeding mechanism sends the battery to the folding long edge membrane mechanism, and then folds the other side of the battery. In this way, the folding operation through two steps is more delicate, the folding effect is better, and defects are not easy to occur. In addition, such a structure does not need to consider factors such as strict symmetry of force when folding the two sides. The technical solution of the present application effectively solves the problem that the coating method in the prior art is simple and rough, which is prone to quality problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a battery folding device disclosed in an embodiment of the present application is shown;

[0018] Figure 2 Shows Figure 1 A schematic diagram of the structure of a battery folding device viewed from above;

[0019] Figure 3 Shows Figure 1 A schematic structural diagram of a battery folding device from another angle;

[0020] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of a feeding mechanism of a battery folding device;

[0021] Figure 5 Shows Figure 4 A bottom view schematic diagram of a feeding mechanism;

[0022] Figure 6 Shows Figure 1 A schematic diagram of the three-dimensional structure of the folding ear membrane mechanism of the battery folding device;

[0023] Figure 7 Shows Figure 6 A schematic diagram of the three-dimensional structure of the folding ear membrane mechanism from another angle;

[0024] Figure 8 Shows Figure 7 A bottom view schematic diagram of the folding ear membrane mechanism;

[0025] Fig. 9 Shows Figure 1A schematic diagram of the three-dimensional structure of a long edge film folding mechanism of a battery folding device;

[0026] Fig.10 Shows Fig. 9 A schematic diagram of the three-dimensional structure of the long edge film folding mechanism from another angle;

[0027] Fig.11 Shows Fig. 9 A bottom view schematic diagram of a folding long edge film mechanism;

[0028] Fig.12 Shows Figure 1 A schematic diagram of the three-dimensional structure of the second positioning and pressing assembly of the battery folding device;

[0029] Fig.13 Shows Fig.12 A bottom view schematic diagram of a second positioning and clamping assembly;

[0030] Fig.14 A schematic flow chart of a battery encapsulation method according to an embodiment of the present application is shown.

[0031] The above drawings contain the following reference numerals:

[0032] 10. Base mechanism; 20. Feeding mechanism; 30. Folding ear edge film mechanism; 31. Folding ear edge mounting seat assembly; 32. First folding ear edge film assembly; 321. First cylinder; 322. First mounting plate structure; 323. Second cylinder; 324. First rolling film structure; 33. First positioning and clamping assembly; 34. Second folding ear edge film assembly; 40. Folding long side film mechanism; 41. Folding long side film mounting seat assembly; 42. First folding long side film assembly; 421. Third cylinder; 422. Second mounting plate structure; 423. Second rolling film structure; 43. Second positioning and clamping assembly; 44. Second folding long side film assembly; 100. Battery. DETAILED DESCRIPTION

[0033] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0034] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0035] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0036] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0037] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0038] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0040] like Figures 1 to 13As shown, in some exemplary embodiments of the present application, a battery folding device is provided, including: a base mechanism 10, a feeding mechanism 20, a folding ear edge film mechanism 30 and a folding long edge film mechanism 40. The feeding mechanism 20 is movably mounted on the base mechanism 10. The folding ear edge film mechanism 30 is arranged on the base mechanism 10. The folding long edge film mechanism 40 is arranged on the base mechanism 10. The folding ear edge film mechanism 30 and the folding long edge film mechanism 40 are arranged at intervals along the feeding direction of the feeding mechanism 20.

[0041] Through the above technical scheme, a battery folding device is provided, in which a feeding mechanism 20 is used for feeding, and the feeding mechanism 20 delivers the battery 100 to the folding ear edge membrane mechanism 30 for folding, and then the feeding mechanism 20 delivers the battery 100 to the folding long edge membrane mechanism 40, and then folds the other side of the battery. In this way, the folding operation through two steps is more delicate, the folding effect is better, and defects are not easy to occur. In addition, such a structure does not need to consider factors such as strict symmetry when folding the two sides. The technical solution of this embodiment effectively solves the problem that the coating method in the prior art is simple and rough, and is prone to quality problems.

[0042] It should be noted that the base mechanism 10 can be a whole or divided into several independent parts, for example, the folding ear edge film mechanism 30 is arranged on one part of the base mechanism 10, and the folding long edge film mechanism 40 is arranged on another part of the base mechanism 10. This embodiment is collectively referred to as the base mechanism 10.

[0043] like Figures 1 to 8 As shown, in the technical solution of this embodiment, the folding ear membrane mechanism 30 includes a folding ear mounting seat assembly 31, a first folding ear membrane assembly 32 and a first positioning and clamping assembly 33. The first positioning and clamping assembly 33 and the folding ear mounting seat assembly 31 are respectively arranged on both sides of the feeding mechanism 20, and the first folding ear membrane assembly 32 is movably arranged on the folding ear mounting seat assembly 31. The first positioning and clamping assembly 33 positions the battery 100. It should be noted that the clamping part of the first positioning and clamping assembly 33 is smaller than the side of the battery 100. For example, the size of the battery side is 100X20mm, and the pressing part of the first positioning and clamping assembly 33 is 90x15mm. In this way, when the first folding ear membrane assembly 32 is working, the first positioning and clamping assembly 33 will not cause damage to the folded edge on the other side. Figure 6 and Figure 7 As shown, the first positioning and clamping assembly 33 and other positioning and clamping assemblies arranged on the three sides around the battery cooperate with each other to position the battery 100, thereby ensuring that the battery will not be misplaced during folding.

[0044] It should be noted that the folding ear edge mounting seat assembly 31 includes a folding ear main cylinder and a folding ear edge vertical plate structure. The cylinder body of the folding ear main cylinder is installed on the base mechanism 10, and the output end of the folding ear main cylinder is connected to the folding ear edge vertical plate structure. The folding ear edge vertical plate structure and the base mechanism 10 are movably matched through horizontal slide rails and horizontal slide grooves, so that the feeding mechanism 20 can avoid when feeding the battery 100, and the battery 100 can be clamped, folded, and other operations can be performed on the battery after it is in place.

[0045] like Figures 6 to 8 As shown, in the technical solution of this embodiment, the first folding pole ear edge membrane assembly 32 includes a first cylinder 321, a first mounting plate structure 322, a second cylinder 323 and a first rolling membrane structure 324. The cylinder seat of the first cylinder 321 is mounted on the folding pole ear edge mounting seat assembly 31, the output end of the first cylinder 321 is connected to the first mounting plate structure 322, the first mounting plate structure 322 is vertically movably mounted on the folding pole ear edge mounting seat assembly 31, the cylinder seat of the second cylinder 323 is rotatably mounted on the side of the first mounting plate structure 322 facing the first positioning and clamping assembly 33, the first rolling membrane structure 324 is rotatably mounted on the side of the first mounting plate structure 322 facing the first positioning and clamping assembly 33, and the output end of the second cylinder 323 is rotatably connected to the non-working surface of the first rolling membrane structure 324. The first cylinder 321 drives the first mounting plate structure 322 to move up and down, and the second cylinder 323 drives the first rolling membrane structure 324 to achieve the synthesis of horizontal displacement and vertical displacement. There are mutually matching horizontal slide rails and slideways between the first mounting plate structure 322 and the base mechanism 10, which will not be described in detail here. The axis of the first cylinder 321 is set vertically, and the axis of the second cylinder 323 is set obliquely, and the inclination angle with the vertical plane is between 15° and 65°. Specifically: the first mounting plate structure 322 includes a first mounting plate, a first pair of lugs and a second pair of lugs, the first pair of lugs are mounted on the first mounting plate, and the second pair of lugs are mounted on the first mounting plate. The mounting axis between the first pair of lugs and the second cylinder 323 is closer to the first positioning and clamping assembly 33 than the mounting axis between the second lug and the second cylinder 323. The corresponding cylinder of the second folding ear edge membrane assembly 34 is that the lower end protrudes more than the upper end.

[0046] like Figures 5 to 8 As shown, in the technical solution of this embodiment, the first rolling film structure 324 includes a first rolling film, the first rolling film includes an arc surface and a plane, and the output end of the second cylinder 323 is rotatably connected to the arc surface. The plane as the working surface makes the folding effect better, and the structure of the arc surface makes the movement of the first rolling film relatively gentle. During the bending action, the working surface and the curved arc are closely matched. Specifically, the first rolling film is cylindrical, and the plane is a plane cut along the parallel central axis. The first rolling film can rotate at an angle of 90° under the joint constraints of its own central axis and the second cylinder 323, from the plane parallel to the ground to the plane perpendicular to the ground.

[0047] like Figure 7 and Figure 8 As shown, in the technical solution of this embodiment, the folding ear membrane mechanism 30 also includes a second folding ear membrane assembly 34, which is movably arranged on the folding ear mounting seat assembly 31 and is located at the lower part of the first folding ear membrane assembly 32. The second folding ear membrane assembly 34 includes a fourth cylinder, a second mounting plate structure, a fifth cylinder and a second rolling membrane structure, and its connection structure is similar to that of the first folding ear membrane assembly 32. The second folding ear membrane assembly includes a third rolling membrane, and the third rolling membrane is similar to the first rolling membrane in structure. The second folding ear membrane assembly 34 is in the same vertical plane as the first folding ear membrane assembly 32. The folding ear positioning assembly cooperates with the first positioning and clamping assembly 33. There are three folding ear positioning assemblies, which cooperate with the first positioning and clamping assembly 33 to form four side positioning. Each folding ear positioning assembly includes a cylinder, and the cylinder drives the pressing part to press and fix the battery 100. It should be noted that the first folded ear edge membrane assembly 32 and the second folded ear edge membrane assembly 34 simultaneously bend both sides of the battery 100, so that the battery 100 is subjected to a more balanced force during the coating, and the coating effect is better.

[0048] like Figures 9 to 13 As shown, in the technical solution of this embodiment, the folding long side film mechanism 40 includes a folding long side film mounting seat assembly 41, a first folding long side film assembly 42 and a second positioning and pressing assembly 43. The second positioning and pressing assembly 43 and the folding long side film mounting seat assembly 41 are respectively arranged on both sides of the feeding mechanism 20, and the first folding long side film assembly 42 is movably arranged on the folding ear edge mounting seat assembly 31. The above structure can realize the positioning and fixing of the battery 100, and the bending of the side of the long side of the battery 100.

[0049] like Fig. 9 and Fig.10 As shown, in the technical solution of this embodiment, the first folded long side film assembly 42 includes a third cylinder 421, a second mounting plate structure 422 and a second rolling film structure 423. The cylinder seat of the third cylinder 421 is mounted on the folded long side film mounting seat assembly 41, and the output end of the third cylinder 421 is connected to the second mounting plate structure 422. The second mounting plate structure 422 can be vertically movably mounted on the folded long side film mounting seat assembly 41, and the second rolling film structure 423 can be rotatably mounted on the side of the second mounting plate structure 422 facing the second positioning and clamping assembly 43. The third cylinder 421 drives the second rolling film to first press against the wide surface (upper or lower surface) of the battery and then slowly press against the side of the battery 100. It should be noted that the second rolling film is rotatably installed, and the cross section of the second rolling film is circular, which is different from the structure of the first rolling film. This is due to the different bending structures of the bent long side and the side of the pole ear.

[0050] like Fig. 9 As shown, in the technical solution of this embodiment, the folding long side film mechanism 40 also includes a second folding long side film assembly 44, which is movably arranged on the folding ear edge mounting seat assembly 31, and the second folding long side film assembly 44 is located at the lower side of the first folding long side film assembly 42. The first folding long side film assembly 42 and the second folding long side film assembly 44 jointly bend the long side of the battery 100. Such a structure improves the bending efficiency on the one hand, and makes the symmetrical two sides of the long side bear force at the same time on the other hand, so that the battery 100 has a better covering effect and a more balanced force.

[0051] It should be noted that the roller in this embodiment is coated with rubber or silicone material, which can reduce damage to the battery and even reduce dangerous accidents. The base mechanism 10 is also controlled by a cylinder to control the movement of the clamping claw, and the clamping claw clamps the battery 100.

[0052] like Fig.14 As shown, according to another aspect of the present application, a battery film encapsulation method is also provided. The battery film encapsulation method adopts the above-mentioned battery folding device, and the battery film encapsulation method includes the following steps:

[0053] S10 The feeding mechanism 20 is feeding. S20 The folding ear side membrane mechanism 30 extrude and wrap the first side corner of the battery from the horizontal direction to the vertical direction. S30 The folding long side membrane mechanism 40 extrude and wrap the second side corner of the battery, and the first side corner and the second side corner are arranged relatively. There are two first side corners, and there are also two second side corners. The folding ear side membrane mechanism 30 includes a first folding ear side membrane assembly 32 and a second folding ear side membrane assembly 34. The first folding ear side membrane assembly 32 and the second folding ear side membrane assembly 34 simultaneously bend the ear side of the battery 100, so that the force on the battery is balanced and the bending effect is better.

[0054] The first cylinder 321 and the second cylinder 323 of the first folding ear membrane assembly 32 move in coordination, and the axial movement of the second cylinder 323 is converted into the vertical movement and the horizontal movement of the first rolling membrane structure 324. The first cylinder 321 realizes the positioning of the initial extrusion position of the first rolling membrane, and the second cylinder 323 realizes the bending of the corner.

[0055] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0056] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A battery folding device, characterized in that: include: Base mechanism (10); A feeding mechanism (20), wherein the feeding mechanism (20) is movably mounted on the base mechanism (10); A folding ear membrane mechanism (30), wherein the folding ear membrane mechanism (30) is arranged on the base mechanism (10); A long-side film folding mechanism (40), wherein the long-side film folding mechanism (40) is arranged on the base mechanism (10); The folded edge film mechanism (30) and the folded long edge film mechanism (40) are arranged at intervals along the feeding direction of the feeding mechanism (20).

2. The battery folding device according to claim 1, characterized in that: The folding ear membrane mechanism (30) comprises a folding ear mounting seat assembly (31), a first folding ear membrane assembly (32) and a first positioning and clamping assembly (33); the first positioning and clamping assembly (33) and the folding ear mounting seat assembly (31) are respectively arranged on two sides of the feeding mechanism (20); the first folding ear membrane assembly (32) is movably arranged on the folding ear mounting seat assembly (31).

3. The battery folding device according to claim 2, characterized in that: The first folding ear membrane assembly (32) comprises a first cylinder (321), a first mounting plate structure (322), a second cylinder (323) and a first rolling membrane structure (324); the cylinder seat of the first cylinder (321) is mounted on the folding ear mounting seat assembly (31); the output end of the first cylinder (321) is connected to the first mounting plate structure (322); the first mounting plate structure (322) can be vertically movably mounted on the folding ear mounting seat assembly (31); the cylinder seat of the second cylinder (323) is rotatably mounted on a side of the first mounting plate structure (322) facing the first positioning and clamping assembly (33); the first rolling membrane structure (324) is rotatably mounted on a side of the first mounting plate structure (322) facing the first positioning and clamping assembly (33); the output end of the second cylinder (323) is rotatably connected to a non-working surface of the first rolling membrane structure (324).

4. The battery folding device according to claim 3, characterized in that: The first rolling film structure (324) comprises a first rolling film, the first rolling film comprises an arcuate surface and a plane, and the output end of the second cylinder (323) is rotatably connected to the arcuate surface.

5. The battery folding device according to claim 2, characterized in that: The folding ear membrane mechanism (30) further comprises a second folding ear membrane assembly (34), wherein the second folding ear membrane assembly (34) is movably arranged on the folding ear mounting seat assembly (31) and is located at the lower part of the first folding ear membrane assembly (32).

6. The battery folding device according to any one of claims 1 to 5, characterized in that: The folded edge film mechanism (40) comprises a folded edge film mounting seat assembly (41), a first folded edge film assembly (42) and a second positioning and clamping assembly (43); the second positioning and clamping assembly (43) and the folded edge film mounting seat assembly (41) are respectively arranged on both sides of the feeding mechanism (20); and the first folded edge film assembly (42) is movably arranged on the folded edge ear mounting seat assembly (31).

7. The battery folding device according to claim 6, characterized in that: The first folded long side film assembly (42) comprises a third cylinder (421), a second mounting plate structure (422) and a second rolling film structure (423); the cylinder seat of the third cylinder (421) is mounted on the folded long side film mounting seat assembly (41); the output end of the third cylinder (421) is connected to the second mounting plate structure (422); the second mounting plate structure (422) is vertically movably mounted on the folded long side film mounting seat assembly (41); and the second rolling film structure (423) is rotatably mounted on the side of the second mounting plate structure (422) facing the second positioning and clamping assembly (43).

8. The battery folding device according to claim 6, characterized in that: The folded long side film mechanism (40) further comprises a second folded long side film assembly (44), wherein the second folded long side film assembly (44) is movably arranged on the folding ear edge mounting seat assembly (31), and the second folded long side film assembly (44) is located at the lower side of the first folded long side film assembly (42).

9. A battery coating method, characterized in that: The battery film encapsulation method adopts the battery folding device according to any one of claims 1 to 8, and the battery film encapsulation method comprises the following steps: S10: the feeding mechanism (20) feeds the material; S20: the folding ear edge film mechanism (30) performs extrusion film wrapping on the first side corner of the battery from the horizontal direction to the vertical direction; S30: the long side film folding mechanism (40) performs extrusion film wrapping on the second side corner of the battery, wherein the first side corner and the second side corner are arranged opposite to each other.

10. The battery coating method according to claim 9, characterized in that: The first cylinder (321) and the second cylinder (323) of the first folding ear membrane assembly (32) move in coordination, and the axial movement of the second cylinder (323) is converted into vertical movement and horizontal movement of the first rolling membrane structure (324).

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