Cylindrical battery

Abstract

The utility model discloses a cylindrical battery, which comprises a top cover structure, the top cover structure comprises a top cover sheet and an elastic annular insulating part, the inner side of the annular insulating part is provided with an annular groove, and the annular insulating part seals and wraps the edge of the top cover sheet through the annular groove; the shell is internally provided with a battery cell, and the shell is provided with a first wrapping and sealing part used for wrapping, sealing and pressing the annular insulating part. According to the cylindrical battery provided by the embodiment of the invention, before the top cover sheet is hermetically connected with the shell, the elastic annular insulating part is formed on the edge of the top cover sheet in advance in a plasticizing forming manner; when the top cover piece is connected with the shell in a sealed mode, the annular insulating part is tightly pressed in a sealed mode through the first wrapping sealing part of the shell, the sealing technology can be simplified, and high-reliability sealed connection among the top cover piece, the annular insulating part and the shell is achieved through the elasticity of the annular insulating part.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to a cylindrical battery. Background Technology

[0002] Traditional cylindrical batteries, used as energy storage components, rely heavily on their sealing performance, which directly impacts their safety and lifespan. Current technologies typically employ a structure consisting of a casing, internal cells, and a top cover. However, this approach suffers from several technical limitations: the sealing process between the top cover and the casing is complex and lacks reliability, restricting its application in high-reliability fields such as new energy vehicles. Therefore, structural innovation is urgently needed to overcome these technical bottlenecks, simplifying the manufacturing process while constructing a sealed structure with inherent safety features. Utility Model Content

[0003] The purpose of this application is to provide a cylindrical battery to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:

[0005] This application provides a cylindrical battery, comprising:

[0006] The top cover structure includes a top cover sheet and an elastic annular insulating member. The inner side of the annular insulating member has an annular groove, and the annular insulating member seals and wraps the edge of the top cover sheet through the annular groove.

[0007] The housing contains an electric cell and has a first sealing part for wrapping, sealing and pressing annular insulating parts.

[0008] Optionally, a first insulating member is provided between the battery cell and the top cover sheet, and a second insulating member is provided between the housing and the battery cell. The housing is also provided with a second wrapping seal for bending the top of the second insulating member to the horizontal edge of the first insulating member.

[0009] Optionally, the first and second sealing portions are positioned adjacent to each other, together forming an S-shaped double-ringed groove.

[0010] Optionally, the first and second package sealing parts are integrally formed using a metal forming process.

[0011] Alternatively, the annular insulating element is formed on the edge of the top cover sheet by plastic molding.

[0012] Optionally, the cylindrical battery also includes a connecting tab for connecting the cell and the top cover tab.

[0013] Compared with the prior art, the beneficial effects of the embodiments of this application are:

[0014] The cylindrical battery provided in this application has an elastic annular insulating component formed on the edge of the top cover sheet by plastic molding before the top cover sheet is sealed to the casing. When the top cover sheet is sealed to the casing, the annular insulating component is sealed and pressed by the first encapsulating sealing part of the casing. This simplifies the sealing process and utilizes the elasticity of the annular insulating component to achieve a highly reliable sealed connection between the top cover sheet, the annular insulating component, and the casing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This paper shows a schematic diagram of the structure of a cylindrical battery according to an embodiment of the present application;

[0017] Figure 2 The illustration shows a top view of the top cover structure of a cylindrical battery according to an embodiment of this application;

[0018] Figure 3 This is a bottom view of the top cover structure of a cylindrical battery according to an embodiment of this application;

[0019] Figure 4 A bottom view of the top cover sheet provided in an embodiment of this application is shown;

[0020] Figure 5 A top view of the annular insulating member provided in an embodiment of this application is shown;

[0021] Figure 6 A cross-sectional view of the top cover structure of a cylindrical battery according to an embodiment of this application is shown;

[0022] Figure 7 This illustration shows a structural schematic diagram of a cylindrical battery casing provided in an embodiment of this application;

[0023] Figure 8 A schematic diagram of the battery cell structure provided in an embodiment of this application is shown;

[0024] Figure 9 A schematic diagram of the structure of the first insulating member provided in an embodiment of this application is shown;

[0025] Figure 10 A schematic diagram of the structure of the second insulating member provided in an embodiment of this application is shown;

[0026] Figure 11A schematic diagram of the connecting piece provided in an embodiment of this application is shown;

[0027] Figure 12 A cross-sectional view of a cylindrical battery provided in an embodiment of this application is shown;

[0028] Figure 13 for Figure 12 The upper part of the diagram.

[0029] Illustration:

[0030] 10. Top cover structure; 11. Top cover piece; 111. Protrusion; 112. Mounting hole; 12. Annular insulating component; 121. Annular groove; 20. Housing; 21. First encapsulated sealing part; 22. Second encapsulated sealing part; 30. Battery cell; 40. First insulating component; 41. Horizontal edge; 50. Second insulating component; 51. Top; 60. Connecting piece. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0035] Please see Figures 1 to 13As shown, this application embodiment provides a cylindrical battery, including a top cover structure 10 and a housing 20. The top cover structure 10 includes a top cover sheet 11 and an elastic annular insulating member 12. The annular insulating member 12 has an annular groove 121 on its inner side, and the annular insulating member 12 seals and wraps around the edge of the top cover sheet 11 through the annular groove 121. A battery cell 30 is installed inside the housing 20, and the housing 20 is provided with a first sealing portion 21 for wrapping, sealing, and pressing the annular insulating member 12.

[0036] As an example, the annular insulating element 12 is formed on the edge of the top cover plate 11 by plastic molding.

[0037] Before the top cover 11 is sealed to the housing 20, the cylindrical battery described above has an elastic annular insulating member 12 formed on the edge of the top cover 11 by plastic molding. When the top cover 11 is sealed to the housing 20, the annular insulating member 12 is sealed and pressed by the first wrapping sealing part 21 of the housing 20, which simplifies the sealing process and utilizes the elasticity of the annular insulating member 12 to achieve a highly reliable sealed connection between the top cover 11, the annular insulating member 12 and the housing 20.

[0038] As an example, the cylindrical battery also includes a connecting piece 60 for connecting the cell 30 and the top cover piece 11.

[0039] As an example, a mounting hole 112 for installing an explosion-proof valve is also provided next to the top cover plate 11.

[0040] As an example, the top cover 11 has an upwardly protruding bulge 111 in the middle, and multiple cylindrical batteries can be electrically connected (in series or in parallel) through the bulge 111 to form a battery module, which can improve the ease of assembly.

[0041] In some embodiments of this application, a first insulating member 40 is provided between the battery cell 30 and the top cover plate 11, and a second insulating member 50 is provided between the housing 20 and the battery cell 30. The housing 20 is also provided with a second wrapping sealing portion 22 for bending the top 51 of the second insulating member 50 to the horizontal edge 41 of the first insulating member 40.

[0042] As an example, such as Figure 13 As shown, the first sealing part 21 and the second sealing part 22 are adjacent to each other and together form an S-shaped double annular groove.

[0043] As an example, the first wrapping seal 21 and the second wrapping seal 22 are integrally formed using a metal forming process.

[0044] The aforementioned cylindrical battery forms a sealing structure between the first encapsulating sealing part 21, the annular insulating member 12, and the top cover plate 11. Another sealing structure is formed between the second encapsulating sealing part 22, the horizontal edge 41 of the first insulating member 40, and the top 51 of the second insulating member 50. The first encapsulating sealing part 21 and the second encapsulating sealing part 22 are adjacent to each other, so that their cross-sectional view structure forms an S-shaped sealing structure. Together, they form a reliable sealing system, which can improve the sealing reliability of the battery while simplifying the manufacturing process.

[0045] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A cylindrical battery, characterized in that, include: A top cover structure, the top cover structure including a top cover sheet and an elastic annular insulating member, the inner side of the annular insulating member having an annular groove, the annular insulating member sealingly wrapping the edge of the top cover sheet through the annular groove; The housing contains an electric cell and has a first sealing portion for wrapping, sealing and pressing the annular insulating member.

2. A cylindrical battery according to claim 1, characterized in that, A first insulating element is provided between the battery cell and the top cover plate, and a second insulating element is provided between the housing and the battery cell. The housing is also provided with a second wrapping sealing part for bending the top of the second insulating element to the horizontal side of the first insulating element.

3. A cylindrical battery according to claim 2, characterized in that, The first and second sealing portions are adjacent to each other, forming an S-shaped double-ring groove.

4. A cylindrical battery according to claim 2, characterized in that, The first and second sealing parts are integrally formed using a metal forming process.

5. A cylindrical battery according to claim 1, characterized in that, The annular insulating element is formed on the edge of the top cover sheet by plastic molding.

6. A cylindrical battery according to claim 1, characterized in that, It also includes a connecting piece for connecting the battery cell and the top cover plate.

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