Top patch assembly and battery

Abstract

The present application discloses a top patch assembly and a battery. The top patch assembly comprises a top patch and a release film. An adhesive layer is arranged on the surface of the top patch. The release film comprises a film body and a handle. The film body is attached to the top patch by means of the adhesive layer, and the handle is arranged at one end of the film body. The film body comprises a first cutting opening passing through the film body, wherein the first cutting opening is located at the end of the film body close to the handle, and one end of the first cutting opening extends to an area where the film body is attached to the adhesive layer.

Description

A top patch assembly and battery Cross Reference to Related Applications

[0001] This application claims priority to the Chinese patent application No. 202421151394.6, filed on May 24, 2024, and entitled "A top patch assembly and battery", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to, but is not limited to, the technical field of lithium battery parts, and in particular to a top patch assembly and battery. BACKGROUND

[0003] The lithium battery parts include a shell, a cover plate, and a top patch, etc., wherein the top patch covers the cover plate and plays a role of insulation and voltage resistance. In order to realize the automation of assembly, the top patch is usually covered on a release film, and the separation of the top patch and the release film is completed by the cooperation of a suction cup and a mechanical hand. SUMMARY

[0004] The following is a summary of the subject matter of the detailed description herein. This summary is not intended to limit the scope of the claims.

[0005] The present application provides a top patch assembly, comprising: a top patch, a surface of the top patch being provided with a glue layer; a release film, comprising a film body and a handle; the film body is attached to the top patch through the glue layer, and the handle is arranged at one end of the film body; the film body comprises a first cutting port penetrating through the film body, and the first cutting port is located at one end of the film body close to the handle; one end of the first cutting port extends to the attachment area of the film body and the glue layer.

[0006] According to one embodiment of the present application, the other end of the first cutting port extends to the edge of the end of the film body where the handle is located.

[0007] According to one embodiment of the present application, the first cutting port has two, and the two first cutting ports are respectively located on both sides of the handle.

[0008] According to one embodiment of the present application, the other end of the first cutting port extends to the connection between the edge of the film body and the edge of the handle.

[0009] According to one embodiment of the present application, the other end of the first cutting port extends to the handle.

[0010] According to one embodiment of the present application, the first cutting port extends to one end of the attachment area, and a second cutting port is arranged at the one end.

[0011] According to one embodiment of the present application, the end of the second cutting opening is connected with one end of the first cutting opening extending to the bonding area, and the second cutting opening forms an included angle with the first cutting opening.

[0012] According to one embodiment of the present application, the second cutting opening is arc-shaped or curved.

[0013] According to one embodiment of the present application, the length of the first cutting opening extending into the bonding area is 3mm to 10mm.

[0014] The present application also provides a battery comprising a cover plate and the top patch in the above top patch assembly.

[0015] The technical effects achieved by the present application include: the top patch assembly of the present application divides the bonding boundary by setting the first cutting opening on the film body, and one end of the first cutting opening extends to the bonding area of the film body and the adhesive layer, thereby reducing the bonding force at the bonding boundary when tearing, and facilitating the removal of the release film; further, the second cutting opening set at the end of the first cutting opening can avoid tearing of the release film during peeling, thereby solving the problems of difficult peeling and easy tearing of the release film existing in the prior art top patch assembly.

[0016] Other aspects can be apparent after reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] FIG. 1 is an exploded view of the top patch assembly of the present application embodiment 1;

[0019] FIG. 2 is a schematic view of the release film of the top patch assembly of the present application embodiment 2;

[0020] FIG. 3 is a schematic view of the release film of the top patch assembly of the present application embodiment 3;

[0021] FIG. 4 is a schematic view of the release film of the top patch assembly of the present application embodiment 4;

[0022] FIG. 5 is a schematic view of the release film of the top patch assembly of the present application embodiment 5;

[0023] FIG. 6 is a schematic view of the release film of the top patch assembly of the present application embodiment 6;

[0024] FIG. 7 is a schematic view of the release film of the top patch assembly of the present application embodiment 7;

[0025] Figure 8 is an assembly diagram of the cover plate and the top patch of the battery of the embodiment 8 of the present application. Reference signs

[0026] 1, top patch; 2, release film; 3, cover plate; 11, top patch glue-free surface; 12, glue layer; 20, film body; 21, handle; 211, first cutting port; 212, second cutting port. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the embodiments to be described below are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] It should be understood that, when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0029] It should also be understood that the terms used in the specification of the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application. As used in the specification of the embodiments of the present application and the appended claims, unless otherwise clearly indicated by the context, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0030] Due to the process difference of top patches from different manufacturers and the difference of release force of release films, the top patch and the release film cannot be separated when the mechanical hand tears off the release film, and the release film is easily torn when being torn off.

[0031] The present application provides a top patch assembly and a battery, and the use of the top patch assembly with the structure can effectively solve the problems of difficult release and easy tearing of the release film.

[0032] In the embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments. Embodiment 1

[0033] Figure 1 is an exploded view of the top patch assembly of the embodiment 1 of the present application. As shown in Figure 1, the top patch assembly includes a top patch 1 and a release film 2.

[0034] The surface of the top patch 1, such as the inner surface, is provided with a glue layer 12.

[0035] The release film 2 comprises a film body 20 and a handle 21, the film body 20 is attached to the top patch 1 through the adhesive layer 12, and the handle 21 is arranged, for example, fixedly arranged at one end of the film body 20; the film body 20 comprises a first cutting port 211 extending through the film body 20 in the thickness direction of the film body 20, and the first cutting port 211 is located at one end of the film body 20 close to the handle 21; wherein one end of the first cutting port 211 extends to the attached area of the film body 20 and the adhesive layer 12, and the other end of the first cutting port 211 extends to the connection between the edge of the film body 20 and the edge of the handle 21.

[0036] The length of the first cutting port 211 extending into the attached area is 3mm to 10mm. Preferably, the length of the first cutting port 211 extending into the attached area is 3mm to 5mm. In this embodiment, the length of the first cutting port 211 extending into the attached area is 5mm. It is found through research that, in order to achieve the purpose of making the release film 2 and the top patch 1 more easily peeled, the first cutting port 211 only needs to extend to the attached area between the top patch 1 and the film body 20.

[0037] In this embodiment, the film body 20 can be a long strip-shaped rectangle, and the handle 21 can be a rectangle arranged at one end of the film body 20. The extending direction of the first cutting port 211 is arranged along the length direction of the release film 2, so that the film body 20 can be torn off along the division line formed by the first cutting port 211 when the handle 21 is pulled to tear off the film body 20. Generally, the width of the rectangle of the handle 21 is smaller than the width of the long strip-shaped rectangle of the film body 20.

[0038] The shape of the film body 20 is not limited in this embodiment, and the shape of the film body 20 can be adapted to the size of the top patch 1. For example, the outer boundary of the film body 20 can coincide with the outer boundary of the top patch 1. In addition, the shape of the handle 21 is not limited in this embodiment.

[0039] Generally, in order to avoid that the tearing and pulling stress between the handle 21 and the film body 20 is concentrated at the connection between the two, causing the connection to be disconnected when the release film 2 is torn, and further causing the release film 2 to be torn, the connection between the two is often provided with a round corner. In this embodiment, the handle 21 and the film body 20 can be integrally formed, which can facilitate large-scale production and operation of a mechanical hand, and also facilitate pulling of the handle 21 to drive the film body 20 to facilitate tearing of the release film 2.

[0040] In this embodiment, one end of the first cutting port 211 extending to the attached area is provided with a second cutting port 212. The end of the second cutting port 212 is connected with the one end of the first cutting port 211 extending to the attached area, and the second cutting port 212 can be arc-shaped.

[0041] In other embodiments, the second cutting port 212 can be circular arc-shaped, or wavy arc-shaped, can be a smooth curve, or a curved curve, the arc-shaped second cutting port 212 helps to reduce the tearing stress at the connection between the first cutting port 211 and the second cutting port 212, prevents the film body 20 from being torn at the connection between the first cutting port 211 and the second cutting port 212, and helps to tear off the film body 20.

[0042] In some embodiments, a knife can be used to cut the film body 20 to form the first cutting port 211 and the second cutting port 212.

[0043] The top patch assembly of the present embodiment divides the bonding boundary by providing the first cutting port 211 and the second cutting port 212 on the film body 20, and extending one end of the first cutting port 211 to the bonding area of the film body 20 and the adhesive layer 12, reduces the bonding force when tearing to the bonding boundary, thereby facilitating the tearing of the release film 2. The second cutting port 212 can prevent the release film 2 from being torn during peeling, thereby solving the problems of difficult peeling and easy tearing of the release film of the existing top patch assembly. Embodiment 2

[0044] FIG. 2 is a schematic view of the release film of the top patch assembly of the present embodiment 2. As shown in FIG. 2, the release film of the top patch assembly of the present embodiment is different from that of the top patch assembly of embodiment 1 in that the release film of the present embodiment is not provided with a second cutting port, and other structures are the same as those of the top patch assembly of embodiment 1. Embodiment 3

[0045] FIG. 3 is a schematic view of the release film of the top patch assembly of the present embodiment 3. As shown in FIG. 3, the release film of the top patch assembly of the present embodiment is different from that of the top patch assembly of embodiment 1 in that the second cutting port 212 of the release film of the present embodiment is linear, the second cutting port 212 and the first cutting port 211 form an angle of 120°, and other structures are the same as those of the top patch assembly of embodiment 1.

[0046] In other embodiments, the second cutting port 212 and the first cutting port 211 form an angle, which can be an obtuse angle, an acute angle, or a right angle, as long as an angle is formed. Embodiment 4

[0047] FIG. 4 is a schematic view of the release film of the top patch assembly of the present embodiment 4. As shown in FIG. 4, the release film of the top patch assembly of the present embodiment is different from that of the top patch assembly of embodiment 1 in that the handle 21 of the release film of the present embodiment is trapezoidal in shape.

[0048] In other embodiments, the handle 21 can have other shapes. For example, the handle 21 can be a right triangle, a rhombus, or other irregular shapes. Embodiment 5

[0049] Figure 5 is a schematic view of the release film of the top patch assembly of the embodiment 5. As shown in the release film of the top patch assembly of Figure 5, the embodiment differs from the top patch assembly of the embodiment 1 in that the other end of the first cut 211 extends to the edge of the end of the film body 20 where the handle 21 is located, and is located on one side of the handle 21, for example, the left side.

[0050] The other end of the first cut 211 can extend to either side of the handle 21, as long as it is ensured that the position thereof is not too close to the edge of the film body 20, so as to avoid leaving residues in the area between the edge of the film body 20 and the first cut 211 during the tearing process.

[0051] Figure 6 is a schematic view of the release film of the top patch assembly of the embodiment 6. As shown in the release film of the top patch assembly of Figure 6, the embodiment differs from the top patch assembly of the embodiment 1 in that the first cut 211 has two, for example, the first cuts 211 and 211', and the other ends of the first cuts 211 and 211' both extend to the edge of the end of the film body 20 where the handle 21 is located, and are respectively located on both sides of the handle 21.

[0052] At this time, the second cut 212 can also have two, for example, the second cuts 212 and 212', which can be respectively arranged at the end of the first cuts 211 and 211' extending to the bonding area. The second cuts 212 and 212' can be arranged in mirror symmetry.

[0053] The more the cuts are, the more the bonding sites are divided, and the smaller the bonding force between the top patch 1 and the release film 2 is during the separation, and the release film 2 is easier to be torn. The number of the cuts is not limited in the present application.

[0054] Figure 7 is a schematic view of the release film of the top patch assembly of the embodiment 7. As shown in the release film of the top patch assembly of Figure 7, the embodiment differs from the top patch assembly of the embodiment 1 in that the other end of the first cut 211 extends to the handle 21, and the distance of the first cut 211 extending in the handle 21 is about 1 / 3 of the length of the handle 21.

[0055] In order to avoid the handle 21 being cut by the first cut 211, the extension position of the first cut 211 should not extend too deep into the handle 21.

[0056] The present application also provides a battery, as shown in Figure 8, which comprises a cover plate 3 and the top patch 1 in the top patch assembly of any one of the embodiments 1-7.

[0057] In the assembling process, the battery of the embodiment sucks the top patch glue-free surface 11, the mechanical hand clamps the handle 21 of the release film 2 of the top patch assembly to peel off, and after the release film 2 is peeled off, the top patch 1 is adhered to the cover plate 3.

[0058] The above is a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A top patch assembly, comprising: a top patch, a surface of the top patch being provided with an adhesive layer; a release film, comprising a film body and a handle; the film body being attached to the top patch through the adhesive layer, and the handle being provided at one end of the film body; the film body comprising a first cutting port extending through the film body, the first cutting port being located at one end of the film body close to the handle; one end of the first cutting port extending to an attachment area of the film body and the adhesive layer.

2. The top patch assembly of claim 1, wherein, the other end of the first cutting port extending to an edge of the film body at the end where the handle is located.

3. The top patch assembly of claim 2, wherein, the first cutting port has two, and the two first cutting ports are respectively located at two sides of the handle.

4. The top patch assembly of claim 1, wherein, the other end of the first cutting port extends to a connection between an edge of the film body and an edge of the handle.

5. The top patch assembly of claim 1, wherein, the other end of the first cutting port extends to the handle.

6. The top patch assembly of any one of claims 1-5, wherein, one end of the first cutting port extending to the attachment area is provided with a second cutting port. 7.The top patch assembly according to claim 6, wherein, an end of the second cutting port is connected to one end of the first cutting port extending to the attachment area, and the second cutting port forms an included angle with the first cutting port. 8.The top patch assembly according to claim 6 or 7, wherein, the second cutting port is arc-shaped or curved.

9. The top patch assembly of any one of claims 1 to 8, wherein, the length of the first cutting port extending into the attachment area is 3mm to 10mm. 10.A battery, comprising a cover plate and a top patch in the top patch assembly according to any one of claims 1 to 9.

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