Top patch and battery
By designing a top patch with overlapping zones, the problems of lax pasting on the side walls of the top cover patch and failure of insulation on the side walls of the battery case are solved, and tighter insulation and lower costs are achieved.
Patent Information
- Application Number
- CN202420228115.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-01-30
AI Technical Summary
In the prior art, the top cover patch is prone to gaps when it is pasted to the side wall of the battery case, resulting in insulation failure, and the notch design can easily lead to lax and lifting of the patch.
A top patch is designed, which includes a main body portion and an extension portion, the extension portion is folded along the outer peripheral edge of the top cover, and an overlapping region is formed on the outer peripheral edge portion of the top cover, and the overlapping region is attached to the side wall of the housing, To ensure tight wrapping of the top cover and housing side walls.
Through the design of overlapping zones, it ensures that there is no gap when the top patch covers the side wall of the shell, improves insulation, and reduces the risk of lax patches and curling, while simplifying the processing process and reducing costs.
Smart Images
Figure CN222514959U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a top patch and a battery. Background Art
[0002] After the battery is assembled, it is usually wrapped with an insulating film on its outer surface. On the one hand, it can play an insulating role to prevent the metal shell from short-circuiting with the external circuit, and on the other hand, it can play a protective role to prevent the metal shell from being worn and scratched. In addition, since the battery top cover needs to lead out the pole, the insulating film cannot completely wrap the battery top cover, so a top cover patch is usually attached to the battery top cover. Its function is the same as that of the insulating film, which is to play an insulating and protective role.
[0003] In the related art, the top cover patch includes a main body and a flange, the main body covers the battery top cover, and the flange extends downward to the metal shell. In order to facilitate the flange to be pasted to the metal shell, a notch is usually designed on the flange, but it is easy to cause the flange to be loosely pasted and the flange to be easily lifted from the notch, causing the insulation of the top cover patch to fail. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a top patch, which can wrap the top cover and the side wall of the shell more tightly by setting an overlapping area, prevent the top patch from covering the side wall of the shell, and ensure the insulation of the top patch.
[0005] According to the top patch of the first aspect of the utility model, the battery comprises a shell and a top cover closing the shell opening, the top patch comprises a main body and an extension connected to the circumference of the main body, the main body covers the outer surface of the top cover, the extension is folded along the outer periphery of the top cover toward the shell, and at the outer periphery of the top cover, parts of the extension are overlapped to construct an overlapping area, and the overlapping area is attached to the side wall of the shell.
[0006] According to the top patch of the embodiment of the utility model, the top patch includes a main body and an extension part connected to the circumference of the main body, the main body covers the outer surface of the top cover, the extension part is folded along the outer periphery of the top cover toward the shell body, parts of the extension part are overlapped to construct an overlapping area, the overlapping area is attached to the side wall of the shell, and the overlapping area can wrap the top cover and the side wall of the shell more tightly to prevent gaps from appearing when the top patch covers the side wall of the shell, thereby ensuring the insulation of the top patch.
[0007] According to some embodiments of the present invention, a plurality of overlapping regions are provided, and the plurality of overlapping regions are spaced apart from each other along the circumference of the top cover.
[0008] According to some embodiments of the present invention, the battery is a square battery, and the overlapping area is located at a corner of the square battery.
[0009] According to some embodiments of the present invention, the extension portion has a first stacking sheet and a second stacking sheet, the first stacking sheet and the second stacking sheet are separated by a slit, and the first stacking sheet and the second stacking sheet are overlapped to construct the overlapping area.
[0010] According to some embodiments of the present invention, the distance between the end of the extension portion away from the main body and the outer surface of the top cover is W, satisfying: W ≥ 4 mm.
[0011] According to some embodiments of the present invention, the thickness of the top patch is D, which satisfies: 0.05≤D≤0.2mm.
[0012] According to some embodiments of the present invention, the top patch is an integrally formed insulating piece.
[0013] According to some embodiments of the utility model, the main body is provided with an explosion-proof valve through hole, and the explosion-proof valve through hole is used to avoid the explosion-proof valve; and / or, the main body is provided with a pole through hole, and the pole through hole is used to avoid the pole; and / or, the main body is provided with positive and negative electrode identification through holes, and the positive and negative electrode identification through holes are used to avoid the positive and negative electrode identifications.
[0014] According to some embodiments of the utility model, the size of the explosion-proof valve through hole is equal to or larger than the size of the explosion-proof valve; and / or, the size of the pole through hole is equal to or larger than the size of the pole; and / or, the size of the positive and negative electrode identification through holes is equal to or larger than the size of the positive and negative electrode identification.
[0015] The battery according to the embodiment of the second aspect of the utility model comprises: a shell and a top cover closing the opening of the shell, and the top cover is provided with a top patch according to the embodiment of the first aspect of the utility model.
[0016] According to the battery of the embodiment of the utility model, by providing the above-mentioned top patch, the top cover and the side wall of the shell can be wrapped more tightly to prevent gaps from appearing when the top patch covers the side wall of the shell, thereby ensuring the insulation of the top patch and further improving the safety of the battery.
[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0019] Figure 1 is a schematic diagram of a battery according to an embodiment of the utility model;
[0020] Figure 2 It is a schematic diagram of a top patch according to an embodiment of the utility model.
[0021] Reference numerals:
[0022] 10. Battery; 11. Top cover; 111. Positive pole; 112. Explosion-proof valve; 113. Positive pole mark; 12. Shell;
[0023] 20. Top patch; 21. Main body; 211. Pole through hole; 212. Explosion-proof valve through hole; 22. Extension; 23. Overlapping area; 231. First stacking sheet; 232. Second stacking sheet. DETAILED DESCRIPTION
[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0025] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] Reference below Figure 1-Figure 2 A top patch 20 according to an embodiment of the present invention is described.
[0028] Reference Figure 1-Figure 2 According to the top patch 20 of the first embodiment of the utility model, the top patch 20 is used for the battery 10, and the battery 10 includes a shell 12 and a top cover 11, the shell 12 has an opening, and the top cover 11 is used to close the opening of the shell 12. The top patch 20 includes a main body 21 and an extension 22, the extension 22 is connected to the circumference of the main body 21, the main body 21 covers the outer surface of the top cover 11, and the extension 22 is folded along the outer periphery of the top cover 11 toward the shell 12, which can not only reduce the risk of insulation failure caused by the damage of the insulation film at the welding point between the top cover 11 and the shell 12; it can also increase the contact area between the top patch 20 and the shell 12, and prevent the outer edge of the top patch 20 from warping. For example, an angle can be formed between the main body 21 and the extension 22, and the angle can be 90°.
[0029] For example, the main body 21 may be fixedly connected to the top cover 11 by using adhesive, and the extension portion 22 may be covered on the shell 12 by using adhesive.
[0030] At the outer periphery of the top cover 11, parts of the extension portion 22 are overlapped to construct an overlapping area 23, and the overlapping area 23 is attached to the side wall of the shell 12. The overlapping area 23 can wrap the side walls of the top cover 11 and the shell 12 more tightly, and can prevent gaps from appearing when the top patch 20 covers the side wall of the shell 12, thereby ensuring the insulation of the top patch 20.
[0031] In the related art, in order to facilitate the top patch 20 to be pasted on the housing 12, a notch is set on the extension part 22, but the notch of the extension part 22 will cause the problem of poor coverage, resulting in poor insulation of the top patch 20; and the top patch 20 is easy to warp at the notch of the extension part 22, resulting in the top patch 20 not being pasted tightly. On the other hand, setting a notch on the extension part 22 will increase the processing steps of the top patch 20, thereby increasing the cost of the top patch 20. The top patch 20 of the present application can be processed and formed in one piece, thereby reducing the cost of the top patch 20.
[0032] According to the top patch 20 of the embodiment of the utility model, the top patch 20 includes a main body 21 and an extension portion 22 connected to the circumference of the main body 21, the main body 21 covers the outer surface of the top cover 11, the extension portion 22 is folded along the outer periphery of the top cover 11 toward the shell 12, and parts of the extension portion 22 are overlapped to construct an overlapping area 23. The overlapping area 23 can wrap the side walls of the top cover 11 and the shell 12 more tightly to prevent gaps from appearing when the top patch 20 covers the side walls of the shell 12, thereby ensuring the insulation of the top patch 20.
[0033] According to some embodiments of the present invention, referring to Figure 1-Figure 2 There are multiple overlapping areas 23, and the multiple overlapping areas 23 are spaced apart along the circumference of the top cover 11, which can avoid the problem of all the overlapping areas 23 being gathered together, resulting in poor coverage at the overlapping areas 23.
[0034] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The battery 10 is a square battery 10, and the overlapping area 23 is located at the corner of the square battery 10, which can not only completely cover the corner of the square battery 10, reducing the risk of the corner of the square battery 10 being exposed, and ensuring the insulation of the top patch 20; it can also effectively avoid the risk of the top patch 20 warping at the corner of the square battery 10, and has the effect of improving the reliability of the bonding between the top patch 20 and the top cover 11.
[0035] An overlapping area 23 is provided at each corner of the square battery 10 . The overlapping area 23 can completely cover each corner of the square battery 10 , thereby ensuring the insulation of the top patch 20 .
[0036] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The extension portion 22 has a first stacking sheet 231 and a second stacking sheet 232, and the first stacking sheet 231 and the second stacking sheet 232 are separated by a slit. The first stacking sheet 231 and the second stacking sheet 232 are overlapped to construct an overlapping area 23, which can facilitate the first stacking sheet 231 and the second stacking sheet 232 to be adhered to the side wall of the shell 12.
[0037] For example, the first overlapping sheet 231 can be pasted toward the adjacent side wall, and the second overlapping sheet 232 can be pasted toward the adjacent side wall. For another example, the first overlapping sheet 231 and the second overlapping sheet 232 can be overlapped and then pasted to the side wall of the housing 12.
[0038] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The distance between the end of the extension portion 22 away from the main body portion 21 and the outer surface of the top cover 11 is W, satisfying: W ≥ 4 mm, which can reduce the risk of the extension portion 22 warping up, so that the extension portion 22 can better fit on the side wall of the shell 12, thereby ensuring the firmness of the top patch 20 adhered to the top cover 11.
[0039] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The thickness of the top patch 20 is D, which satisfies: 0.05≤D≤0.2mm. Within this range, on the one hand, the firmness of the top patch 20 being adhered to the top cover 11 can be ensured, and on the other hand, the internal space of the battery 10 occupied by the top patch 20 can be reduced.
[0040] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The top patch 20 is an integrally formed insulating member, which can make the top patch 20 have good insulation and can be used to protect the battery core; and the processing cost of the top patch 20 is low and the processing technology is simple. The material of the top patch 20 can be a variety of materials, including but not limited to PET, PI, PP and other plastic materials; PET is preferred, as PET has a lower cost.
[0041] For example, the surface energy of the top patch 20 is ≥ 30 dynes, which can ensure that the top patch 20 is firmly attached to the top cover 11 .
[0042] For another example, the 180° peeling force of the top patch 20 is ≥3 N / cm, which can reduce the risk of the top patch 20 peeling off from the top cover 11 .
[0043] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The main body 21 is provided with an explosion-proof valve through hole 212, which is used to avoid the explosion-proof valve 112, so that the explosion-proof valve 112 can be exposed to the external environment from the top patch 20 through the explosion-proof valve through hole 212, which is convenient for the operation of the explosion-proof valve 112. The main body 21 is provided with a pole through hole 211, which is used to avoid the pole, and the pole can extend from the top patch 20 through the pole through hole 211, which is convenient for the electrical connection of the pole. The pole may include a positive pole 111 and a negative pole.
[0044] The main body 21 is also provided with positive and negative electrode identification through holes, which are used to avoid the positive and negative electrode identification through holes. The positive and negative electrode identification through holes can be observed to identify the positive and negative electrodes of the battery 10. The positive and negative electrode identification can include a positive electrode identification 113 and a negative electrode identification. The positive electrode identification 113 is used to identify the positive electrode of the battery 10, and the negative electrode identification is used to identify the negative electrode of the battery 10.
[0045] For example, the explosion-proof valve through hole 212, the pole through hole 211 and the positive and negative electrode identification through holes can be set in a top view shape according to the device that needs to be exposed by the battery 10, such as: square, racetrack, circle, rectangle, ellipse, etc.
[0046] In a specific example, the main body 21 does not need to be provided with positive and negative electrode identification through holes, and positive and negative electrode markings can be directly provided on the main body 21 to indicate the positive and negative electrodes of the battery 10.
[0047] According to some embodiments of the present invention, referring to Figure 1-Figure 2The size of the explosion-proof valve through hole 212 is equal to or greater than the size of the explosion-proof valve 112, so that the explosion-proof valve 112 can be completely exposed to the external environment through the explosion-proof valve through hole 212, preventing the explosion-proof valve 112 from interfering with the outer wall of the explosion-proof valve through hole 212. The size of the pole through hole 211 is equal to or greater than the size of the pole, so that the pole can extend from the top patch 20 through the pole through hole 211, avoiding the interference between the pole and the outer wall of the pole through hole 211. The size of the positive and negative electrode mark through hole is equal to or greater than the size of the positive and negative electrode mark, so that the positive and negative electrode mark can be completely exposed through the positive and negative electrode mark through hole, avoiding the interference between the positive and negative electrode mark and the outer wall of the positive and negative electrode mark through hole.
[0048] The battery 10 according to the second embodiment of the utility model comprises a shell 12 and a top cover 11 for sealing the opening of the shell 12 , and the top cover 11 is provided with a top patch 20 according to the first embodiment of the utility model.
[0049] According to the battery 10 of the embodiment of the utility model, by providing the above-mentioned top patch 20, the top cover 11 and the side walls of the shell 12 can be wrapped more tightly, preventing gaps from appearing when the top patch 20 covers the side walls of the shell 12, thereby ensuring the insulation of the top patch 20 and further improving the safety of the battery 10.
[0050] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0051] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A top patch for a battery, the battery comprising a shell and a top cover closing an opening of the shell, characterized in that: The top patch includes a main body and an extension portion connected to the circumference of the main body, the main body covers the outer surface of the top cover, the extension portion is folded along the outer periphery of the top cover toward the shell, and at the outer periphery of the top cover, parts of the extension portion are overlapped to construct an overlapping area, and the overlapping area is attached to the side wall of the shell.
2. The top patch according to claim 1, characterized in that: A plurality of overlapping regions are provided, and the plurality of overlapping regions are spaced apart from each other along the circumference of the top cover.
3. The top patch according to claim 2, characterized in that: The battery is a square battery, and the overlapping area is located at a corner of the square battery.
4. The top patch according to claim 1, characterized in that: The extension portion has a first stacking sheet and a second stacking sheet, the first stacking sheet and the second stacking sheet are separated by a slit, and the first stacking sheet and the second stacking sheet are stacked to construct the overlapping area.
5. The top patch according to claim 1, characterized in that: A distance W between an end of the extension portion away from the main body portion and an outer surface of the top cover satisfies: W≥4 mm.
6. The top patch according to claim 1, characterized in that: The thickness of the top patch is D, which satisfies: 0.05≤D≤0.2mm.
7. The top patch according to claim 1, characterized in that: The top patch is an integrally formed insulating piece.
8. The top patch according to claim 1, characterized in that: The main body is provided with an explosion-proof valve through hole, and the explosion-proof valve through hole is used to avoid the explosion-proof valve; and / or, the main body is provided with a pole through hole, and the pole through hole is used to avoid the pole; and / or, the main body is provided with positive and negative electrode identification through holes, and the positive and negative electrode identification through holes are used to avoid the positive and negative electrode identifications.
9. The top patch according to claim 8, characterized in that: The size of the explosion-proof valve through hole is equal to or larger than the size of the explosion-proof valve; and / or, the size of the pole through hole is equal to or larger than the size of the pole; and / or, the size of the positive and negative electrode identification through hole is equal to or larger than the size of the positive and negative electrode identification.
10. A battery, characterized in that: include: A shell and a top cover for closing an opening of the shell, wherein the top cover is provided with a top patch according to any one of claims 1-9.