Top patch and battery

Abstract

A top patch (1, 2). A first through hole (101) is formed on the top patch (1, 2); the top patch (1, 2) can be attached to the cover plate (3, 4); the first through hole (101) is provided corresponding to a pole (31, 41) and / or a battery two-dimensional code on the cover plate (3, 4); and the length and width of the cover plate (3, 4) are respectively a and c, and the length and width of the top patch (1, 2) are respectively A and C: 0.5 mm≤a-A≤8 mm, and / or 0.5 mm≤c-C≤8 mm. Also provided is a battery, comprising the cover plate (3, 4) and the top patch (1, 2) that is attached to the cover plate (3, 4). The top patch (1, 2) and the battery provided with the top patch (1, 2) can protect the cover plate (3, 4) during laser welding, thereby ensuring the quality of the cover plate (3, 4) and the battery.

Description

Top patch and battery

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application with application number CN202323648109.X and title “Top Patch and Battery” filed with the China Patent Office on December 29, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a top patch and a battery. Background Art

[0004] The battery consists of a shell and positive and negative electrode covers. During the battery manufacturing process, the shell and the positive and negative electrode covers need to be laser welded. The welding slag splashes on the cover during welding and damages the cover, causing battery quality problems.

[0005] Therefore, there is an urgent need for a top patch and a battery to solve the above problems.

[0006] Application Contents

[0007] In view of this, the present application proposes a top patch that can protect the cover plate during laser welding and ensure the quality of the cover plate and the battery.

[0008] The present application provides a top patch, which is provided with a first through hole. The top patch can be attached to a cover plate, and the first through hole is opened corresponding to the position of the pole and / or the battery QR code on the cover plate. The length and width of the cover plate are a and c respectively, and the length and width of the top patch are A and C respectively, satisfying: 0.5mm≤aA≤8mm, and / or, 0.5mm≤cC≤8mm.

[0009] Beneficial effect: The top patch can be attached to the cover plate, which can protect the cover plate during laser welding and prevent welding spatter from damaging the cover plate, thereby ensuring the quality of the cover plate and the battery. By opening a first through hole on the top patch, the first through hole is opened corresponding to the position of the pole and / or the battery QR code on the cover plate, which can ensure normal communication between the pole and the outside world, and the battery QR code on the cover plate can be viewed normally. The length and width of the cover plate are a and c respectively, and the length and width of the top patch are A and C respectively, satisfying: 0.5mm≤aA≤8mm, and / or, 0.5mm≤cC≤8mm. That is, the size of the top patch is slightly smaller than the cover plate. If the sizes of the two are too close, it will affect welding. If the size difference is too large, the area of ​​the uncovered cover plate will be too large, and the protection effect will be poor. Therefore, the above size range can further ensure the protection effect without hindering welding.

[0010] In an optional embodiment, a second through hole is opened on the top patch, and the second through hole is opened corresponding to the explosion-proof valve of the cover plate.

[0011] In an optional embodiment, the top patch is provided with a first positive and negative electrode identification, or the top patch is provided with a third through hole, and the third through hole is opened corresponding to the second positive and negative electrode identification of the cover plate.

[0012] In an optional embodiment, the top patch is provided with a first positive and negative electrode identification, or the top patch is provided with a third through hole, and the third through hole is opened corresponding to the second positive and negative electrode identification of the cover plate.

[0013] In an optional embodiment, the edge width of the first through hole is greater than or equal to 1 mm;

[0014] And / or, the edge width of the second through hole is greater than or equal to 1 mm;

[0015] And / or, the edge width of the third through hole is greater than or equal to 1 mm.

[0016] In an optional embodiment, the top patch includes a body layer and an adhesive layer, and the adhesive layer can be attached and bonded to the cover plate.

[0017] In an optional embodiment, the thickness D1 of the body layer satisfies 0.1 mm ≤ D1 ≤ 2 mm, and / or the thickness D2 of the adhesive layer satisfies 0.025 mm ≤ D2 ≤ 0.3 mm.

[0018] In an optional embodiment, the adhesive strength of the adhesive layer is greater than or equal to 15 N / in.

[0019] In an optional embodiment, two first through holes are provided, and the two first through holes are opened corresponding to the positions of the pole and the battery QR code respectively.

[0020] Another object of the present application is to provide a battery that can protect the cover plate during laser welding and ensure the quality of the cover plate and the battery.

[0021] The present application provides a battery comprising a cover plate and the above-mentioned top patch, wherein the top patch is attached to the cover plate.

[0022] In an optional embodiment, the battery further includes a shell and a blue film, the blue film is wrapped on the shell, the cover plate is welded to the opening of the shell, and the cover plate and the shell together form a sealed inner cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] FIG1 is an exploded view of a battery provided in an embodiment of the present application;

[0025] FIG2 is a schematic diagram of the structure of the positive electrode cover provided in an embodiment of the present application;

[0026] FIG3 is a schematic structural diagram of a positive electrode top patch (with two first through holes) provided in an embodiment of the present application;

[0027] FIG4 is a schematic structural diagram of a positive electrode top patch (with a first through hole) provided in an embodiment of the present application;

[0028] FIG5 is a schematic diagram of the structure of the negative electrode cover provided in an embodiment of the present application;

[0029] FIG6 is a schematic structural diagram of a negative electrode top patch (with two first through holes) provided in an embodiment of the present application;

[0030] FIG7 is a schematic structural diagram of a negative electrode top patch (with a first through hole) provided in an embodiment of the present application.

[0031] Explanation of the accompanying symbols: 1-positive electrode top patch; 101-first through hole; 102-second through hole; 11-first positive electrode identification; 2-negative electrode top patch; 21-first negative electrode identification; 3-positive electrode cover; 31-positive electrode column; 32-second positive electrode identification; 33-explosion-proof valve; 4-negative electrode cover; 41-negative electrode column; 42-second negative electrode identification; 5-shell; 6-blue film. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0033] As shown in Figures 1 to 7, the top patch of this embodiment can be attached to the cover plate, which can protect the cover plate during laser welding and prevent welding spatter from damaging the cover plate, thereby ensuring the quality of the cover plate and the battery. By opening a first through hole 101 on the top patch, and the first through hole 101 is opened at the position of the pole and / or the battery QR code on the cover plate, the normal connection between the pole and the outside world can be guaranteed, and the battery QR code on the cover plate can be viewed normally. The length and width of the cover plate are a and c respectively, and the length and width of the top patch are A and C respectively, satisfying: 0.5mm≤aA≤8mm, and / or, 0.5mm≤cC≤8mm. That is, the size of the top patch is slightly smaller than the cover plate. If the sizes of the two are too close, it will affect welding. If the size difference is too large, the area of ​​the uncovered cover plate will be too large, and the protection effect will be poor. Therefore, the above size range can further ensure the protection effect without hindering welding.

[0034] As shown in FIG3 and FIG4 , preferably, a second through hole 102 is opened on the top patch, and the second through hole 102 is opened corresponding to the explosion-proof valve 33 of the cover plate to prevent the top patch from interfering with the opening of the explosion-proof valve 33 .

[0035] Optionally, a first positive and negative electrode identification is provided on the top patch, that is, the positive and negative electrodes can be displayed on the top patch for easy assembly. In this embodiment, a first positive electrode identification 11 is provided on the positive electrode top patch 1, and a first negative electrode identification 21 is provided on the negative electrode top patch 2. The positive electrode top patch 1 is attached to the positive electrode cover plate 3, and the negative electrode top patch 2 is attached to the negative electrode cover plate 4. Of course, in other embodiments, the positive and negative electrodes can also be provided on the same cover plate. In this case, three first through holes 101 are provided on the top patch to correspond to the positive electrode column, the negative electrode column and the battery QR code respectively, and the positive electrode identification and the negative electrode identification can be provided near the positive and negative electrode columns accordingly.

[0036] Optionally, a third through-hole is provided on the top patch, corresponding to the second positive and negative markings on the cover plate. This allows the positive and negative poles to be displayed on the top patch, facilitating assembly. Specifically, the third through-hole on the positive top patch 1 corresponds to the second positive marking 32 on the positive cover plate 3, and the third through-hole on the negative top patch 2 corresponds to the second negative marking 42 on the negative cover plate 4, allowing the second positive marking 32 and the second negative marking 42 to be easily visible.

[0037] Preferably, the edge width of the first through hole 101 is greater than or equal to 1 mm, preferably, the edge width of the second through hole 102 is greater than or equal to 1 mm, and preferably, the edge width of the third through hole is greater than or equal to 1 mm. If the edge is too narrow, it is easy to break, difficult to process, and difficult to attach to the cover.

[0038] Preferably, the top patch includes a body layer and an adhesive layer, and the adhesive layer can be attached to the cover plate. Preferably, the body layer is made of an insulating material, such as PC, PP, PE, etc., and the base material of the adhesive layer can be PET, cotton or other materials.

[0039] Preferably, the thickness D1 of the body layer satisfies 0.1 mm ≤ D1 ≤ 2 mm. Preferably, the thickness D2 of the adhesive layer satisfies 0.025 mm ≤ D2 ≤ 0.3 mm. Preferably, the adhesive strength of the adhesive layer is greater than or equal to 15 N / in, where N / in is Newton per inch.

[0040] As shown in Figures 3 and 6, optionally, two first through holes 101 can be provided, and the two first through holes 101 are opened corresponding to the positions of the pole and the battery QR code respectively. As shown in Figures 4 and 7, optionally, one first through hole 101 can also be provided, and the first through hole 101 is opened corresponding to the positions of the pole and the battery QR code.

[0041] As shown in FIG1 , this embodiment further provides a battery, including a cover plate and the above-mentioned top patch, wherein the top patch is attached to the cover plate. The battery can protect the cover plate during laser welding, thereby ensuring the quality of the cover plate and the battery.

[0042] Preferably, the battery further comprises a housing 5 and a blue film 6. The blue film 6 is wrapped around the housing 5 to protect the housing 5 from direct damage from welding slag splashes during welding, and also to protect the housing 5 during other transportation and manufacturing processes. A cover plate is welded to the opening of the housing 5. The cover plate and the housing 5 together form a sealed inner cavity. The top patch and the blue film 6 together protect the battery.

[0043] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims. Industrial Applicability

[0044] This application provides a top patch that can be attached to a cover plate to protect the cover plate during laser welding, preventing welding spatter from damaging the cover plate, thereby ensuring the quality of the cover plate and battery. By providing a first through hole in the top patch, the first through hole is opened corresponding to the position of the terminal and / or the battery QR code on the cover plate, thereby ensuring normal communication between the terminal and the outside world and allowing normal viewing of the battery QR code on the cover plate.

[0045] The present application also provides a battery comprising a cover plate and the aforementioned top patch, wherein the top patch is attached to the cover plate. The battery can protect the cover plate during laser welding, thereby ensuring the quality of the cover plate and the battery.

Claims

1. Top patch, characterized in that, A first through hole is formed in the top patch, and the top patch can be attached to the cover plate. The first through hole is formed corresponding to the position of the pole post and / or the battery two-dimensional code on the cover plate. The length and width of the cover plate are a and c respectively, and the length and width of the top patch are A and C respectively, satisfying: 0.5 mm ≤ a - A ≤ 8 mm, and / or, 0.5 mm ≤ c - C ≤ 8 mm.

2. The top patch according to claim 1, characterized in that, A second through hole is formed in the top patch, and the second through hole is formed corresponding to the explosion-proof valve on the cover plate.

3. The top patch according to claim 2, wherein A first positive and negative pole mark is provided on the top patch, or a third through hole is formed in the top patch, and the third through hole is formed corresponding to the second positive and negative pole mark on the cover plate.

4. The top patch according to claim 3, characterized in that, The edge width of the first through hole is greater than or equal to 1 mm; and / or, the edge width of the second through hole is greater than or equal to 1 mm; and / or, the edge width of the third through hole is greater than or equal to 1 mm.

5. The top patch according to claim 1, wherein, The top patch includes a body layer and an adhesive layer, and the adhesive layer can be attached and bonded to the cover plate.

6. The top patch according to claim 5, characterized in that, The thickness D1 of the body layer satisfies 0.1 mm ≤ D1 ≤ 2 mm, and / or, the thickness D2 of the adhesive layer satisfies 0.025 mm ≤ D2 ≤ 0.3 mm.

7. The top patch according to claim 5, wherein The bonding strength of the adhesive layer is greater than or equal to 15 N / in.

8. The top patch according to claim 1, characterized in that, There are two first through holes, and the two first through holes are respectively formed corresponding to the positions of the pole post and the battery two-dimensional code.

9. A battery, characterized in that, It includes a cover plate and the top patch according to any one of claims 1-8, and the top patch is attached to the cover plate.

10. The battery according to claim 9, wherein It further includes a housing and a blue film. The blue film wraps around the housing. The cover plate is welded to the opening of the housing, and the cover plate and the housing jointly form a sealed inner cavity.

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