CN114873012A

CN114873012A - Film pasting tool and film pasting method

Info

Publication number: CN114873012A
Application number: CN202210328180.0A
Authority: CN
Inventors: 王亮; 李鑫炎; 秦伟贤
Original assignee: Linkdata New Energy Co Ltd
Current assignee: Linkdata New Energy Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-08-09
Anticipated expiration: 2042-03-29
Also published as: CN114873012B

Abstract

The application discloses pad pasting frock and pad pasting method, pad pasting frock includes: the film sticking frame is provided with a hollow area and comprises an inner side face and an outer side face which are oppositely arranged, and a first face and a second face which are connected with the inner side face and the outer side face and are oppositely arranged; a hollow area is formed by the inner side surface of the battery cell for limiting the battery cell; the first surface is used for supporting the coating film, the first surface is provided with a limiting structure for limiting the coating film, and the hollow area is located in a graph area limited by the limiting structure; and the pressing plate is arranged on the first surface in a manner of opening or closing and is used for pressing the coating film when the coating film is closed. The application discloses pad pasting frock, during the pad pasting, the coating film is placed in the first face of pad pasting frame, carries on spacingly through limit structure to adopt the clamp plate to compress tightly fixedly, and electric core carries on spacingly through the medial surface of pad pasting frame, because the fretwork district is located within the figure region that limit structure prescribes a limit to, can make the coating film exceed the size at electric core edge and keep the uniformity, thereby can improve attached precision.

Description

Film pasting tool and film pasting method

Technical Field

The application relates to the technical field of lithium batteries, in particular to a film pasting tool and a film pasting method.

Background

The surface of lithium cell is equipped with the coating film for seal electric core, carry out insulation protection to inner structure.

In the related art, the attachment of the coating film is mainly performed manually, and the dimension of the coating film beyond the edge of the lithium battery is manually controlled by visual observation. The above attachment method makes the insulating film have poor dimensional uniformity beyond the edges of the lithium battery.

Disclosure of Invention

The application provides a pad pasting frock and pad pasting method can make the size that the coating film surpassed electric core edge keep the uniformity to can improve attached precision.

In a first aspect, an embodiment of the present application provides a film pasting tool, including:

the film sticking frame comprises an inner side face and an outer side face which are oppositely arranged, and a first face and a second face which are connected with the inner side face and the outer side face and are oppositely arranged; the inner side surface is enclosed to form the hollow area for limiting the battery cell; the first surface is used for supporting a coating film, the first surface is provided with a limiting structure for limiting the coating film, and the hollow area is located within a graph area limited by the limiting structure;

and the pressing plate is arranged on the first surface in a covering or opening manner and is used for pressing the coating film when the covering is closed.

Optionally, the film sticking frame comprises a cutting end, when the first surface is covered by the pressing plate, the end surface of the pressing plate close to the cutting end is flush with the outer side surface of the cutting end, so that the coated film is cut.

Optionally, when the pressing plate covers the first surface, the limiting structure is used for limiting.

Optionally, the film frame includes: the first barrier strip, the second barrier strip, the third barrier strip and the fourth barrier strip are sequentially connected end to end in a square shape;

the battery cell is limited by the inner side surface of the first barrier strip, the inner side surface of the second barrier strip and the inner side surface of the fourth barrier strip.

Optionally, a first chamfered edge is arranged at the intersection of the second surface and the inner side surface of the second barrier strip;

and a second chamfered edge is arranged at the intersection of the second surface and the inner side surface of the fourth barrier strip.

Optionally, the inner side surface of the first barrier strip includes at least one boss, and the end surface of the boss limits the electric core.

Optionally, a first groove is formed in the first surface of the first barrier strip, and the first groove penetrates through the inner side surface and the outer side surface of the first barrier strip.

Optionally, a second groove is formed in the first surface of the second barrier strip, and the second groove penetrates through the inner side surface and the outer side surface of the second barrier strip;

and/or a third groove is formed in the first surface of the fourth barrier strip, and the third groove penetrates through the inner side surface and the outer side surface of the fourth barrier strip.

Optionally, the first surface of the first barrier strip is provided with at least one first stopper, the first surface of the second barrier strip is provided with at least one second stopper, the first surface of the fourth barrier strip is provided with at least one third stopper, and the first stopper, the second stopper and the third stopper form the limiting structure;

the inner side surfaces of the first stop block, the second stop block and the third stop block are outwards expanded relative to the inner side surface of the film sticking frame.

Optionally, two first stoppers are arranged, and are respectively located at two ends of the first barrier strip;

the pressing plate is in a convex shape and comprises a pressing plate body and a convex protrusion part extending along the outer side surface of the pressing plate body, when the pressing plate covers the first surface, the convex protrusion part exceeds the outer side surface of the first barrier strip, and the end surfaces of the pressing plate body at the two sides of the convex protrusion part are respectively abutted to the two first stop blocks;

the end surface of the pressing plate body close to the second barrier strip is abutted against the second stop block;

the end face, close to the fourth barrier strip, of the pressing plate body abuts against the third stop block.

Optionally, the protruding portion includes a first hollow portion, and the first hollow portion exceeds an outer side surface of the first barrier strip.

Optionally, the pressing plate includes a second hollow portion, and when the pressing plate covers the first surface, a projection of the second hollow portion on the first surface is located within the hollow area.

In a second aspect, an embodiment of the present application further provides a film attaching method, in which the film attaching tool described in the above embodiments is used to attach a coating film on a surface of a battery cell,

the film pasting method comprises the following steps:

placing the coating film on the first surface, and limiting through the limiting structure;

placing the pressing plate on the coating film, and pressing the coating film;

turning over the film pasting tool to enable the second face to face upwards, placing the battery cell into the hollow area, limiting the battery cell through the inner side face, and bonding the coating film and the battery cell;

and removing the film pasting tool, and coating the battery cell with the coating film.

Optionally, after the pressing plate is placed on the covering film and the covering film is compressed, the method further includes:

and cutting the coating film along the outer side surface of the cutting end.

The pad pasting frock of this application embodiment, including pad pasting frame and clamp plate, the coating film is placed in the first face of pad pasting frame, carries on spacingly through limit structure, and adopt the clamp plate to compress tightly fixedly, and electric core carries on spacingly through the medial surface (being the fretwork district) of pad pasting frame, and because the fretwork district is located within the figure region that limit structure prescribed a limit to, can make the coating film surpass the size at electric core edge and keep the uniformity when the pad pasting at every turn, thereby can improve the attached precision of coating film on electric core.

Drawings

The technical solutions and advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of a film laminating tool provided in an embodiment of the present application, wherein a pressing plate faces upward;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic view of the film frame of the film sticking tool of FIG. 1 facing upwards;

fig. 4 is a schematic view illustrating a film attaching tool for fixing a coating film according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a cover film disposed on a film frame according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a wrapping film before being cut according to an embodiment of the present disclosure

Fig. 7 is a schematic flow chart of a film laminating method according to an embodiment of the present application.

Detailed Description

With reference to the figures, the following description is based on illustrated embodiments of the present application and should not be taken as limiting other embodiments of the present application which are not described in detail herein.

The surface of lithium cell is equipped with the coating film for seal electric core, carry out insulation protection to inner structure. In the related art, the attachment of the coating film is mainly performed manually, and the dimension of the coating film beyond the edge of the lithium battery is manually controlled by visual observation. The above attachment method makes the insulating film have poor dimensional uniformity beyond the edges of the lithium battery. Based on this, this application provides a pad pasting frock for attached coating film can improve the attached precision of coating film on electric core.

Referring to fig. 1 to fig. 3, fig. 1 is a schematic structural diagram of a film laminating tool according to an embodiment of the present application, in which a pressing plate faces upward, fig. 2 is an exploded view of fig. 1, and fig. 3 is a schematic structural diagram of a film laminating frame of the film laminating tool of fig. 1 facing upward. This pad pasting frock includes: the film sticking frame comprises a film sticking frame 10 and a pressing plate 20, wherein the film sticking frame 10 is provided with a hollow-out area. For example, the film frame 10 may be a frame formed by processing a hollow area in the middle area of a flat plate, and may be an integrated structure, or may be assembled and spliced by several components, and the present application is not limited in particular.

The pad pasting frame 10 includes relative medial surface 10A and lateral surface 10B that sets up to and connect medial surface 10A and lateral surface 10B and relative first face 10C and the second face 10D that sets up, medial surface 10A encloses into above-mentioned fretwork district, and the shape in the appearance of pad pasting frame 10 and fretwork district can be rectangle, polygon or other irregular shape, can realize the purpose of this application can. Taking fig. 1 as an example, the shape of the film frame 10 is rectangular, and the hollow area is also rectangular, that is, the film frame 10A is substantially in a shape of a square, it can be understood that the inner side surface 10A includes four inner walls of the film frame 10, the outer side surface 10B includes four outer walls of the film frame 10, the first surface 10C is a top surface of the film frame 10, and the second surface 10D is a bottom surface of the film frame 10.

Medial surface 10A is used for spacing electric core 101, for example, when putting into pad pasting frame 10 with electric core 101, can carry on spacingly to electric core 101 through three inner wall of medial surface 10A, also can carry on spacingly to electric core 101 through two adjacent inner walls of medial surface 10A or four inner walls, specifically can design the size of the corresponding square region (being the fretwork district) of pad pasting frame 10 according to the spacing needs of difference.

The first surface 10C is provided with a limiting structure, and the hollow area is located within a graphic area defined by the limiting structure, so that the projection of the battery cell 101 on the first surface 10C during film pasting can be ensured to be located within the graphic area defined by the limiting structure; first face 10C is used for supporting coating film 102, and coating film 102 carries on spacingly through limit structure, limit structure specifically makes coating film 102's position at first face 10C relatively fixed, the coating film can be the polymer insulation film, it is then better to have good heat dispersion, coating film 102 can set up the adhesive towards the one side of electric core in whole face, also can set up the adhesive partially, or do not set up the adhesive, set up the adhesive on electric core 101's surface, when electric core 101 and coating film 102 contact, both can bond. It can be understood that, because the battery cell 101 needs to be coated, the size of the coating film 102 is larger than that of the battery cell 101, and therefore, after the battery cell 101 is placed in the film-attached frame 10, the projection of the first surface 10C is located within the pattern area defined by the limiting structure, so that the coating film 102 can exceed the edge of the battery cell 101. In addition, because the coating film 102 is placed on the first surface 10C and is limited by the limiting structure, and the battery cell 101 is limited by the inner side surface 10A, the size of the coating film 102 exceeding the edge of the battery cell 101 can be kept consistent during film pasting at each time.

A pressing plate 20 is openably or closeably provided to the first face 10C for pressing the cover film 102 when closed. For example, the pressing plate 20 may be hinged to the film frame 10 on the first surface 10C to form a folding structure, or the pressing plate 20 may be an independent structural member relative to the film frame 10, and when the pressing plate is closed, the pressing plate and the film frame are positioned through the positioning post-positioning hole matching. As an example, when the pressing plate 20 covers the first surface 10C, the position can be limited by the limiting structure, that is, both the pressing plate 20 and the cover film 102 are limited by the limiting structure. The specific connection mode of the pressing plate 20 and the film frame 10 is not particularly limited in the present application, and the pressing plate 20 may be covered on the first surface 10C to press the cover film 102.

The film attaching tool of this embodiment is further described with reference to the film attaching process, and please refer to fig. 4, and fig. 4 is a schematic diagram of the film attaching tool for fixing the coating film according to this embodiment. At first place pad pasting frame 10's first face 10C up, then arrange first face 10C in with coating film 102, and spacing through limit structure, arrange clamp plate 20 in again on coating film 102, compress tightly coating film 102, and upset pad pasting frock makes second face 10D up, put into pad pasting frame 10's mouth font region with electric core 101 from second face 10D at last, carry out spacingly through medial surface 10A to electric core 101, this embodiment is that three inner wall through pad pasting frame 10 carries on spacingly to electric core 101. The bottom surface of the battery cell 101 is bonded to the coating film 102, and then the film attaching tool is removed, so that the battery cell 101 is coated by the coating film 102.

The pad pasting frock of this embodiment, including pad pasting frame 10 and clamp plate 20, cladding film 102 is placed in the first face 10C of pad pasting frame 10, carry on spacingly through limit structure, and adopt clamp plate 20 to compress tightly fixedly, electric core 101 carries on spacingly through the medial surface 10A of pad pasting frame 10, and the fretwork district is located within the figure region that limit structure prescribed a limit to, can make cladding film 102 exceed the size at electric core 101 edge and keep the uniformity when the pad pasting at every turn, thereby can improve the attached precision of cladding film 102 on electric core.

In order to improve the application range of the film attaching tool, for example, for attaching the rolled uncut coating film 102, the embodiment of the application further improves the film attaching tool so that the film can be cut when attaching the film. Referring to fig. 5, fig. 5 is a schematic diagram illustrating a coating film disposed on a film frame according to an embodiment of the present disclosure, for convenience of description, two ends of the coating film 102 are defined as a positioning end 102A and an extending end 102B, the positioning end 102A is engaged with a limiting structure, and the extending end 102B is a free end of the coating film 102, and the extending end 102B is cut to obtain a required length of the coating film 102. In the present embodiment, the size of the pressing plate 20 along the length direction of the covering film 102 is further limited, referring to fig. 4, specifically, the film frame 10 includes a cutting end 13, it can be understood that the cutting end 13 corresponds to the extending end 102B of the covering film 102, so as to cut the covering film 102 to a target length. When the pressing plate 20 covers the first surface 10C, the end surface 20B of the pressing plate 20 close to the cut end 13 is flush with the outer side surface 10B of the cut end 13. In pasting, please refer to fig. 4, 5 and 6, fig. 6 is a schematic diagram of the wrapping film before cutting according to an embodiment of the present application, and after the pressing plate 20 presses the wrapping film 102, the wrapping film 102 can be cut along the outer side surface 10B of the cutting end 13 of the frame 10.

In the related art, a steel ruler or a flexible ruler is generally used for measuring the length of an insulating film, then a blade is used for cutting, and the cut insulating film with a preset size is coated on the surface of a lithium battery, so that poor cutting such as cutting size deviation and uneven cuts are easy to occur during cutting. In the film pasting tool of the embodiment, when the pressing plate 20 covers the first surface 10C, the end surface 20B of the pressing plate 20 close to the cutting end 13 is flush with the outer side surface 10B of the cutting end 13 of the film pasting frame 10. The outer side surface 10B of the cut end 13 of the film frame 10 can be used as a cutting surface to reduce poor cutting. The pad pasting frock of this embodiment can realize cutting dual-purpose.

As an example, referring to fig. 2 and 3, the film frame 10 may include a first barrier strip 11, a second barrier strip 12, a third barrier strip 13, and a fourth barrier strip 14, which are sequentially connected end to form a square shape, and the four barrier strips may be independent structural members, and are spliced and assembled to form the film frame 10, or may be an integrated structure. The battery cell 101 is limited by the inner side surface 10A of the first barrier strip 11, the inner side surface 10A of the second barrier strip 12 and the inner side surface 10A of the fourth barrier strip 14, that is, the film frame 10 is limited on three sides of the battery cell 101. In this embodiment, when the pressing plate 20 covers the first surface 10C, the end surface 20B of the pressing plate 20 close to the third barrier strip 13 may be disposed to be flush with the outer side surface 10B of the third barrier strip 13, so that the coating film 102 may be cut along the outer side surface 10B of the third barrier strip 13, and the film attaching tool may be used for both cutting and attaching. In this embodiment, the third barrier 13 can be understood as the cut end 13 of the previous embodiment.

In one embodiment, the present application provides a specific limiting structure, please continue with fig. 2. The limiting structure includes a first stopper 113, a second stopper 123 and a third stopper 143. Specifically, the first surface 10C of the first barrier rib 11 is provided with at least one first stopper 113, the first surface 10C of the second barrier rib 12 is provided with at least one second stopper 123, the first surface 10C of the fourth barrier rib 14 is provided with at least one third stopper 143, and the first stopper 113, the second stopper 123, and the third stopper 143 constitute a limiting structure. The inner side surface of the first stopper 113, the inner side surface of the second stopper 123, and the inner side surface of the third stopper 143 are extended outward relative to the inner side surface 10A of the film-attached frame 10, so that the projection of the battery cell 101 on the first surface 10C is located within the graphic area defined by the limiting structure, that is, the extended size L is the size of the coating film 102 exceeding the edge of the battery cell 101. When the cover film 102 is placed on the first surface 10C, the edge abuts against the inner side surface of the first stopper 113, the inner side surface of the second stopper 123, and the inner side surface of the third stopper 143, thereby forming three-side limitation. Similarly, the pressure plate 20 can be limited on three sides by the limiting structure.

As an example, referring to fig. 2, the first surface 10C of the second barrier rib 12 is provided with two second stoppers 123, the first surface 10C of the fourth barrier rib 14 is provided with two third stoppers 143, and the two second stoppers 123 and the two third stoppers 143 may be arranged opposite to each other or may be arranged in a staggered manner, which is not particularly limited in the present application.

In an embodiment, referring to fig. 2 and fig. 3, at least one boss 111 may be further disposed on the inner side surface 10A of the first barrier strip 11, and an end surface 111A of the boss 111 limits the electric core 101. For example, the number of the bosses 111 may be 1, 2, 3, 4, etc., and when a plurality of bosses are provided, the bosses may be uniformly or symmetrically distributed on the first barrier rib 11. Compare the whole face of the medial surface 10A with first blend stop 11 as the locating surface, adopt boss 111 spacing to make and have the clearance between the medial surface 10A of electric core 101 and first blend stop 11, be convenient for take out the operation.

In an embodiment, referring to fig. 3, the first surface 10C of the first barrier 11 may be provided with a first groove 112, the first groove 112 penetrates the inner side surface 10A and the outer side surface 10B of the first barrier 11, for example, the cross section of the first groove 112 may be semicircular. When the cover film 102 is placed on the first face 10C, the position of the cover film 102 can be corrected manually through the first groove 112. Similarly, the first surface 10C of the second barrier rib 12 may also be provided with a second groove 122, and the second groove 122 penetrates through the inner side surface 10A and the outer side surface 10B of the second barrier rib 12. In addition, the first surface 10C of the fourth bar 14 may be provided with a third groove 142, and the third groove 142 penetrates the inner surface 10A and the outer surface 10B of the fourth bar 14. The second recess 122 and the third recess 142 may be disposed in only one of them, or may be disposed in the same time, and when disposed in the same time, they may be disposed coaxially.

In one embodiment, referring to fig. 3, a first chamfered edge is provided at the intersection of the second surface 10D and the inner side surface 10A of the second bar 12, and a second chamfered edge 144 is provided at the intersection of the second surface 10D and the inner side surface 10A of the fourth bar 14, wherein the first chamfered edge is hidden from view in the figure, and the second chamfered edge 144 can be referred to specifically. The first and second chamfered edges 144 are arranged to extend the operating space for placing the battery cell 101 from the second surface 10D, so as to avoid the battery cell 101 from being stuck into the film frame 10 when the thickness of the battery cell 101 is thin, which is inconvenient for taking out the battery cell, and the chamfered edges may have a large size, such as 10mm (width) × 10mm (depth), 15mm × 10mm, and so on.

In order to facilitate the opening and closing operations of the pressing plate 20, in an embodiment, please continue to refer to fig. 1 and fig. 2, two first stoppers 113 may be disposed at two ends of the first barrier rib 11; the pressing plate 20 may be in a convex shape, and includes a pressing plate body 21 and a protruding portion 22 extending along the outer side surface of the pressing plate body 21, when the pressing plate 20 covers the first surface 10C, the protruding portion 22 exceeds the outer side surface 10B of the first barrier strip 11, the end surfaces 21A of the pressing plate body 21 at the two sides of the protruding portion 22 respectively abut against the two first stoppers 113, it can be understood that the end surfaces 21A of the pressing plate body 21 at the two sides of the protruding portion 22 are two shoulders of the pressing plate 20 in the convex shape; the end surface 21B of the pressing plate body 21 close to the second barrier rib 12 abuts against the second stopper 123, and the end surface 21C of the pressing plate body 21 close to the fourth barrier rib 14 abuts against the third stopper 143. This embodiment can perform the opening and closing operation of the pressing plate 20 with the protrusion 22 as a handle.

In an embodiment, referring to fig. 1, the protruding portion 22 may further include a first hollow portion 221, and the first hollow portion 221 protrudes beyond the outer side surface 10B of the first blocking strip 11, and the first hollow portion 221 is used for grasping during manual operation, so as to improve the convenience of operation of the pressing plate 20.

In an embodiment, in order to prevent the coating film 102 and the pressing plate 20 from being adsorbed to form a vacuum, a second hollow portion 211 may be further disposed on the pressing plate 20, when the pressing plate 20 covers the first surface 10C, a projection of the second hollow portion 211 on the first surface 10C is located within the hollow area of the film attaching frame 10, so as to ensure that when the battery cell 101 is placed into the hollow area of the film attaching frame 10, the pressing plate 20 may support the battery cell 101, so that the coating film 102 is bonded to the battery cell 101, and in addition, the weight of the pressing plate 20 may be reduced by the disposition of the second hollow portion 211, which is convenient for operation, and makes the overall weight of the film attaching tool lighter, and facilitates management of the tool.

Referring to fig. 7, fig. 7 is a schematic flow chart of a film attaching method according to an embodiment of the present application, in this embodiment, the film attaching tool according to the foregoing embodiments may be adopted to attach a coating film on a surface of a battery cell,

the film pasting method comprises the following steps:

s101, placing the coating film on the first surface, and limiting through a limiting structure;

s102, placing a pressing plate on the coating film, and pressing the coating film tightly;

s103, turning over the film pasting tool to enable the second surface to be upward, placing the battery cell into the hollow area, limiting the battery cell through the inner side surface, and bonding the coating film and the battery cell;

s104, removing the film pasting tool, and coating the battery cell with the coating film.

The embodiment can be used for attaching the cut coating film on the surface of the battery core to coat the battery core.

In an embodiment, when the wrapping film is in an uncut state, after step S102, the method may further include:

and cutting the coating film along the outer side surface of the cutting end.

The embodiment can be attached in electric core surface with the coating film that does not cut, cuts when attached, and the pad pasting frock plays and cuts dual-purpose effect.

The film attaching tool and the film attaching method provided by the embodiment of the application are described in detail above, a specific example is applied in the description to explain the principle and the implementation of the application, and the description of the embodiment is only used to help understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

In addition, in the description of the present application, it is to be understood that the terms "top surface", "bottom surface", "on", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. In addition, the same or different reference numerals may be used to identify structures having the same or similar characteristics. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.

Claims

1. The utility model provides a pad pasting frock which characterized in that includes:

the film sticking frame is provided with a hollow area and comprises an inner side face and an outer side face which are oppositely arranged, and a first face and a second face which are connected with the inner side face and the outer side face and are oppositely arranged; the inner side surface is enclosed to form the hollow area for limiting the battery cell; the first surface is used for supporting a coating film, the first surface is provided with a limiting structure for limiting the coating film, and the hollow area is located within a graph area limited by the limiting structure;

2. The film pasting tool according to claim 1, wherein the film pasting frame comprises a cutting end, when the pressing plate covers the first surface, the end surface of the pressing plate close to the cutting end is flush with the outer side surface of the cutting end, so that the coating film is cut.

3. The film pasting tool according to claim 1, wherein when the pressing plate covers the first surface, the limiting structure is used for limiting.

4. The film laminating tool according to claim 1, wherein the film laminating frame comprises: the first barrier strip, the second barrier strip, the third barrier strip and the fourth barrier strip are sequentially connected end to end in a square shape;

5. The film pasting tool according to claim 4, wherein a first chamfered edge is arranged at the intersection of the second surface and the inner side surface of the second barrier strip;

6. The film pasting tool according to claim 4, wherein the inner side surface of the first barrier strip comprises at least one boss, and the end surface of the boss limits the electric core.

7. The film pasting tool according to claim 4, wherein a first groove is formed in a first surface of the first barrier strip, and the first groove penetrates through an inner side surface and an outer side surface of the first barrier strip.

8. The film pasting tool according to claim 4, wherein a second groove is formed in a first surface of the second barrier strip, and the second groove penetrates through the inner side surface and the outer side surface of the second barrier strip;

9. The film sticking tool according to claim 4, wherein at least one first stop block is arranged on a first surface of the first barrier strip, at least one second stop block is arranged on a first surface of the second barrier strip, at least one third stop block is arranged on a first surface of the fourth barrier strip, and the first stop block, the second stop block and the third stop block form the limiting structure;

10. The film sticking tool according to claim 9, wherein two first stop blocks are arranged and are respectively positioned at two ends of the first stop strip;

11. The film sticking tool according to claim 10, wherein the protruding portion comprises a first hollowed-out portion, and the first hollowed-out portion extends beyond the outer side face of the first blocking strip.

12. The film pasting tool according to any one of claims 1 to 11, wherein the pressing plate comprises a second hollowed-out portion, and when the pressing plate covers the first surface, the projection of the second hollowed-out portion on the first surface is located within the hollowed-out area.

13. A film attaching method for attaching a coating film on the surface of a battery cell by adopting the film attaching tool as claimed in any one of claims 1 to 12,

the film pasting method comprises the following steps:

placing the pressing plate on the coating film, and pressing the coating film;

14. The film laminating method according to claim 13, wherein the step of placing the press plate on the cover film and pressing the cover film further comprises:

and cutting the coating film along the outer side surface of the cutting end.