Top patch assembly and battery

Abstract

The utility model discloses a top patch assembly and a battery, and relates to the technical field of lithium battery parts. The top patch assembly comprises a top patch and a release film, and an adhesive layer is arranged on the inner surface of the top patch; the release film comprises a film body and a handle, the film body is attached to the top patch through an adhesive layer, and the handle is fixedly arranged at one end of the film body; the film body is provided with a first cutting opening penetrating through the film body, the first cutting opening is located at the end, close to the handle, of the film body, and one end of the first cutting opening extends to the attaching area of the film body and the adhesive layer. According to the utility model, the problem that the top patch cannot be separated from the release film and is easy to tear when the release film is torn can be solved, and the efficiency of automatic assembly of the lithium battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery parts, in particular to a top patch assembly and a battery. Background Art

[0002] Lithium battery parts include shell, cover plate, and top patch, among which the top patch is covered on the cover plate to play the role of insulation and pressure resistance. In order to realize the automation of lithium battery assembly, the top patch is usually covered on the release film, and the top patch and the release film are separated by the cooperation of the suction cup and the robot.

[0003] Due to the differences in top patch processes from different manufacturers and the differences in the release force of the release film, the top patch and the release film cannot be separated when the robot tears off the release film, and the release film is easily torn during tearing. Utility Model Content

[0004] In order to overcome the above defects existing in the process of mechanical hands tearing off the release film, the utility model provides a top patch assembly and a battery. The top patch assembly with this structure can effectively solve the problem that the release film is difficult to peel off and easy to tear.

[0005] The utility model provides a top patch assembly, comprising:

[0006] A top patch, wherein a glue layer is provided on the surface of the top patch;

[0007] The release film comprises a film body and a handle; the film body is attached to the top patch through the adhesive layer, and the handle is fixedly arranged at one end of the film body;

[0008] The membrane body is provided with a first cutting opening penetrating through the membrane body, and the first cutting opening is located at one end of the membrane body close to the handle;

[0009] One end of the first cutting opening extends to the bonding area of ​​the film body and the adhesive layer.

[0010] According to an embodiment of the present invention, the other end of the first cutting opening extends to the edge of the end of the membrane body where the handle is located, and is located on one side of the handle.

[0011] According to an embodiment of the present invention, there are two first cutting openings, and the other ends of the two first cutting openings extend to the edge of the end of the membrane body where the handle is located, and are respectively located on both sides of the handle.

[0012] According to an embodiment of the present invention, the other end of the first cutting opening extends to the connection between the edge of the membrane body and the edge of the handle.

[0013] According to an embodiment of the present invention, the other end of the first cutting opening extends to the handle.

[0014] According to an embodiment of the present invention, a second cutting opening is provided at one end of the first cutting opening extending to the fitting area.

[0015] According to an embodiment of the present invention, the end of the second cutting opening is connected to one end of the first cutting opening extending to the fitting area, and the second cutting opening forms an angle with the first cutting opening.

[0016] According to an embodiment of the present invention, the end of the second cutting opening is connected to one end of the first cutting opening extending to the fitting area, and the second cutting opening is arc-shaped or curved.

[0017] According to an embodiment of the present invention, the length of the first cutting opening extending into the fitting area is 3-10 mm.

[0018] The utility model also provides a battery, comprising a cover plate and a top patch in the above-mentioned top patch assembly.

[0019] Compared with the prior art, the technical effects that can be achieved by the utility model include:

[0020] The top patch assembly of the utility model is provided with a first cutting opening on the film body, and the first cutting opening extends to the bonding area of ​​the film body and the adhesive layer, thereby dividing the bonding boundary and reducing the adhesive force at the bonding boundary when being torn, thereby facilitating the removal of the release film; further, the second cutting opening provided at the end of the first cutting opening can prevent the release film from being torn during the peeling process, thereby solving the problem that the release film of the existing top patch assembly is difficult to peel off and easy to tear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is an exploded view of the top patch assembly of Example 1 of the utility model;

[0023] Figure 2 This is a schematic diagram of a release film of a top patch assembly of Example 2 of the utility model;

[0024] Figure 3 This is a schematic diagram of a release film of a top patch assembly of Example 3 of the utility model;

[0025] Figure 4 It is a schematic diagram of a release film of a top patch assembly of Example 4 of the utility model;

[0026] Figure 5 It is a schematic diagram of the release film of the top patch assembly of Example 5 of the utility model;

[0027] Figure 6 It is a schematic diagram of the release film of the top patch assembly of Example 6 of the utility model;

[0028] Figure 7 It is a schematic diagram of the release film of the top patch assembly of Example 7 of the utility model;

[0029] Figure 8 This is a schematic diagram of the assembly of the cover plate and the top patch of the battery in Example 8 of the utility model.

[0030] Reference numerals

[0031] 1. Top patch; 2. Release film; 3. Cover plate; 11. Non-adhesive surface of top patch; 12. Adhesive layer; 20. Film body;

[0032] 21. handle; 211. first cutting opening; 212. second cutting opening. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments to be described below are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0035] It should also be understood that the terms used in this utility model embodiment specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model embodiments. As used in the utility model embodiment specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0036] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0037] Example 1

[0038] like Figure 1 The top patch assembly shown includes a top patch 1 and a release film 2 .

[0039] The inner surface of the top patch 1 is provided with an adhesive layer 12 .

[0040] The release film 2 includes a film body 20 and a handle 21. The film body 20 is bonded to the top patch 1 through the adhesive layer 12, and the handle 21 is fixedly arranged at one end of the film body 20. The film body 20 is provided with a first cutting opening 211 which passes through the film body 20, and the first cutting opening 211 is located at one end of the film body 20 close to the handle 21. Among them, one end of the first cutting opening 211 extends to the bonding area between the film body 20 and the adhesive layer 12, and the other end of the first cutting opening 211 extends to the connection between the edge of the film body 20 and the edge of the handle 21.

[0041] The length of the first incision 211 extending into the bonding area is 3-10 mm. Preferably, the length of the first incision 211 extending into the bonding area is 3-5 mm. In this embodiment, the length of the first incision 211 extending into the bonding area is 5 mm. It has been found that in order to achieve the purpose of easier peeling of the release film 2 and the top patch 1, the first incision 211 only needs to extend to the bonding area between the top patch 1 and the film body 20.

[0042] In this embodiment, the release film 2 is a long rectangular strip, the handle 21 is a rectangle set at one end of the release film 2, and the first cutting opening 211 is set along the length direction of the release film 2, so that when the film body 20 is torn off by the handle 21, the film body 20 can be torn off along the dividing line formed by the first cutting opening 211.

[0043] It is understandable that the embodiment of the utility model does not limit the shape of the membrane body 20, and the shape of the membrane body 20 can be consistent with the size of the top patch 1. For example, the outer boundary of the membrane body 20 can coincide with the outer boundary of the top patch 1.

[0044] It should be noted that, in general, in order to prevent the tear stress between the handle 21 and the film body 20 from being concentrated at the connection, which may cause the connection to be disconnected when the release film is torn, resulting in the release film being torn, a rounded corner is often provided at the connection between the two. In this embodiment, the handle 21 and the film body 20 are integrally formed, which can facilitate large-scale production and the operation of a robot, and also facilitate pulling the film body 20 when the handle 21 is pulled to drive the release film 2.

[0045] In this embodiment, the end of the first cutting opening 211 extending to the bonding area is provided with a second cutting opening 212. The end of the second cutting opening 212 is connected to the end of the first cutting opening 211 extending to the bonding area, and the second cutting opening 212 is arc-shaped.

[0046] It should be noted that in other embodiments, the second cutting opening 212 may be in the shape of a circular arc, a wavy arc, a smooth curve, or a curved curve. The arc-shaped second cutting opening 212 helps to reduce the tearing stress at the connection between the first cutting opening 211 and the second cutting opening 212, prevents the film body 20 from being torn at the connection between the first cutting opening 211 and the second cutting opening 212, and helps to protect the film body 20 from being torn.

[0047] Specifically, a cutter may be used to cut the film body 20 to form a first cutting opening 211 and a second cutting opening 212 on the film body 20 .

[0048] The top patch assembly of this embodiment is provided with a first cutting opening and a second cutting opening on the film body, and the first cutting opening extends to the bonding area with the adhesive layer on the film body, thereby dividing the bonding boundary and reducing the adhesive force when being torn to the bonding boundary, which is helpful to help tear off the release film. The second cutting opening can prevent the release film from being torn during the peeling process, thereby solving the problem that the release film of the existing top patch assembly is difficult to peel off and easy to tear.

[0049] Example 2

[0050] like Figure 2 The release film of the top patch assembly shown in the figure is different from the top patch assembly of embodiment 1 in that the release film of the present embodiment is not provided with a second cutting opening, and the other structures are the same as those of the top patch assembly of embodiment 1.

[0051] Example 3

[0052] like Figure 3 The release film of the top patch assembly shown in the figure, the difference between this embodiment and the top patch assembly of embodiment 1 is that the second cutting opening 212 on the release film of this embodiment is linear, and the second cutting opening 212 forms an angle of 120° with the first cutting opening 211, and the other structures are the same as the top patch assembly of embodiment 1.

[0053] It can be understood that, in other embodiments, the second cutting opening 212 and the first cutting opening 211 form an angle, and the angle can be an obtuse angle, an acute angle, or a right angle, as long as an angle is formed.

[0054] Example 4

[0055] like Figure 4 The release film of the top patch assembly shown is different from the top patch assembly of this embodiment and embodiment 1 in that the shape of the release film handle is a trapezoid.

[0056] It is understandable that the handle 21 may be in other shapes, such as a right triangle, a rhombus, or other irregular shapes.

[0057] Example 5

[0058] like Figure 5 The release film of the top patch assembly shown in the figure is different from the top patch assembly of the present embodiment and the top patch assembly of the embodiment 1 in that the other end of the first cutting opening 211 extends to the edge of the end of the film body 20 where the handle 21 is located and is located on the left side of the handle 21 .

[0059] It is understandable that the extension of the other end of the first cutting opening 211 can be located on either side of the handle 21, as long as its position is not too close to the edge of the membrane body 20 to avoid leaving residue in the area between the edge of the membrane body 20 and the first cutting opening 211 during the tearing process.

[0060] Example 6

[0061] like Figure 6 The release film of the top patch assembly shown in the figure is different from the top patch assembly of the present embodiment and the embodiment 1 in that there are two first cutting openings 211 , and the other ends of the first cutting openings 211 and 211 ′ extend to the edge of the end of the film body where the handle is located, and are respectively located on both sides of the handle 21 .

[0062] It can be understood that the more the cutting openings are, the more the bonding parts are divided, the smaller the bonding force between the top patch 1 and the release film 2 is during separation, and the release film 2 is easier to be torn.

[0063] Example 7

[0064] like Figure 7 The release film of the top patch assembly shown in the figure is different from the top patch assembly of Example 1 in that the other end of the first cutting opening 211 extends to the handle 21, and the distance in which the first cutting opening 211 extends inside the handle 21 is about 1 / 3 of the length of the handle.

[0065] It is understandable that, in order to prevent the handle 21 from being cut by the first cutting opening 211 , the extended portion of the first cutting opening 211 will not extend too deep into the handle 21 .

[0066] Example 8

[0067] A battery comprising Figure 8 The cover plate 3 shown and the top patch 1 in the top patch assembly of Examples 1-7.

[0068] During the assembly process of the battery of this embodiment, the robot suction cup absorbs the non-glue surface 11 of the top patch, and the robot clamps the handle of the release film 2 of the top patch assembly to peel it off. After peeling off the release film 2, the top patch 1 is adhered to the cover plate 3.

[0069] The above is a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A top patch assembly, characterized in that: include: A top patch, wherein an adhesive layer is disposed on the inner surface of the top patch; The release film comprises a film body and a handle; the film body is attached to the top patch through the adhesive layer, and the handle is fixedly arranged at one end of the film body; The membrane body is provided with a first cutting opening penetrating through the membrane body, and the first cutting opening is located at one end of the membrane body close to the handle; One end of the first cutting opening extends to the bonding area between the film body and the adhesive layer.

2. The top patch assembly according to claim 1, characterized in that: The other end of the first cutting opening extends to the edge of the end of the membrane body where the handle is located, and is located on one side of the handle.

3. The top patch assembly according to claim 2, characterized in that: There are two first cutting openings, and the other ends of the two first cutting openings extend to the edge of the end of the membrane body where the handle is located, and are respectively located on both sides of the handle.

4. The top patch assembly according to claim 1, characterized in that: The other end of the first cutting opening extends to the connection between the edge of the membrane body and the edge of the handle.

5. The top patch assembly according to claim 1, characterized in that: The other end of the first cutting opening extends to the handle.

6. The top patch assembly according to any one of claims 1 to 5, characterized in that: The first cutting opening is extended to one end of the fitting area and a second cutting opening is provided.

7. The top patch assembly according to claim 6, characterized in that: The end of the second cutting opening is connected to one end of the first cutting opening extending to the fitting area, and the second cutting opening forms an angle with the first cutting opening.

8. The top patch assembly according to claim 6, characterized in that: The end of the second cutting opening is connected to one end of the first cutting opening extending to the fitting area, and the second cutting opening is in an arc or curve shape.

9. The top patch assembly according to claim 1, characterized in that: The length of the first cutting opening extending into the fitting area is 3-10 mm.

10. A battery, characterized in that: The invention comprises a cover plate and a top patch in a top patch assembly as claimed in any one of claims 1 to 9.

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