Pole, top cover assembly and secondary battery

Abstract

The utility model discloses a pole, a top cover assembly and a secondary battery, the pole is used for being installed in an integrated top cover sheet, the pole comprises an upper part and a lower part, the outer diameter of the lower part of the pole is larger than that of the upper part of the pole so as to form a step end face between the upper part and the lower part, and a plurality of first anti-rotation bosses are arranged on the peripheral side of the upper part of the pole at intervals. According to the pole, the top cover assembly and the secondary battery provided by the embodiment of the invention, the structural stability of the assembled top cover assembly and the secondary battery can be improved through the barb structure, and the upper plastic and the pole can be prevented from rotating through the anti-rotating groove or the second anti-rotating boss and the first anti-rotating boss, so that the overall structural stability is improved; and the lower part of the pole is prevented from being damaged, so that the function weakening of the pole is avoided.

Description

Technical Field

[0001] This application belongs to the field of secondary battery technology, and particularly relates to an electrode post, a top cover assembly, and a secondary battery. Background Technology

[0002] Chinese invention patent CN118412595A discloses a battery cover, a method for preparing the battery cover, and a power battery. The following content is recorded in paragraphs

[0050] to

[0051] of the specification of this patent document:

[0003] "In one embodiment, the lower outer diameter of the pole post is larger than the upper outer diameter of the pole post to form a stepped end face between the two. The second insulating member also covers the stepped end face to restrict the second insulating member from detaching from the pole post, so that the second insulating member can be reliably sleeved on the pole post, thereby improving the insulation reliability."

[0004] In one embodiment, the electrode post is provided with a second connecting groove located on the stepped end face. The second insulating member extends into and fills the second connecting groove, thereby increasing the contact area between the second insulating member and the electrode post, ensuring that the second insulating member is reliably fixed to the electrode post, and improving structural reliability.

[0005] However, despite the numerous advantages of the aforementioned technology, in practical applications, the lower part of the electrode post (e.g., conductivity) is weakened because the second connecting groove is located on the stepped end face, thus damaging the lower portion of the electrode post. Therefore, it is necessary to provide a novel electrode post to overcome this technical defect. Utility Model Content

[0006] One of the purposes of this application is to provide a terminal post, a top cover assembly, and a secondary battery, for providing a first anti-rotation protrusion on the upper part of the terminal post to avoid damaging the lower part of the terminal post, thereby preventing the lower part of the terminal post from being weakened.

[0007] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:

[0008] This application provides an electrode post for installation in an integrated top cover plate. The electrode post includes an upper part and a lower part. The outer diameter of the lower part of the electrode post is larger than the outer diameter of the upper part of the electrode post to form a stepped end face between the two. A plurality of first anti-rotation protrusions are provided at intervals on the circumference of the upper part of the electrode post.

[0009] This application provides a top cover assembly, including the aforementioned pole and an integrated top cover sheet;

[0010] The integrated top cover includes: a top cover, the top cover having a through hole for installing the pole post, a surrounding wall structure protruding around the through hole on the outside of the top cover, and a barb structure extending from the top of the surrounding wall structure;

[0011] The surface of the wall structure and / or the barbed structure is provided with a second anti-rotation protrusion or anti-rotation groove;

[0012] The top cover plate, the wall structure, the barb structure, and the second anti-rotation boss are integrally formed, and / or the top cover plate, the wall structure, the barb structure, and the anti-rotation groove are integrally formed.

[0013] Optionally, on the inner side of the wall structure, the top cover plate is provided with a support surface for placing the sealing gasket, and on the inner side of the support surface, there is also a stepped structure for connecting the lower plastic.

[0014] Optionally, the integrated top cover, sealing gasket, and pole are secured together by filling with plastic.

[0015] This application provides a secondary battery, including the aforementioned terminal post or the aforementioned top cover assembly.

[0016] Compared with the prior art, the beneficial effects of the embodiments of this application are:

[0017] The present application provides an electrode post, a top cover assembly, and a secondary battery. By providing multiple first anti-rotation protrusions at intervals on the upper periphery of the electrode post, when the electrode post is assembled with the integrated top cover sheet, the upper plastic forms a snap-fit ​​connection at the first anti-rotation protrusions, thereby preventing the electrode post from rotating. This can avoid damaging the lower part of the electrode post and thus avoid weakening the function of the lower part of the electrode post. Attached Figure Description

[0018] 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.

[0019] Figure 1 A schematic diagram of a pole post provided in an embodiment of this application is shown;

[0020] Figure 2 This illustration shows a structural schematic diagram of an integrated top cover with an anti-rotation groove provided in an embodiment of this application;

[0021] Figure 3 It shows Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This illustration shows a structural schematic diagram of an integrated top cover plate with a second anti-rotation boss provided in an embodiment of this application;

[0023] Figure 5It shows Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 It shows Figure 4 Top view;

[0025] Figure 7 It shows Figure 6 AA section view;

[0026] Figure 8 It shows Figure 7 Enlarged view of point B in the middle;

[0027] Figure 9 An exploded view of the top cover assembly provided in an embodiment of this application is shown;

[0028] Figure 10 A cross-sectional view of the top cover assembly provided in an embodiment of this application is shown.

[0029] Illustration:

[0030] 10. One-piece top cover; 11. Top cover; 111. Through hole; 112. Support surface; 113. Step structure; 12. Enclosure structure; 121. Anti-rotation groove; 122. Second anti-rotation protrusion; 13. Hook structure;

[0031] 20. Sealing gaskets;

[0032] 30. Pole post; 31. Upper part; 311. First anti-rotation boss; 32. Lower part; 33. Stepped end face;

[0033] 40. Apply plastic;

[0034] 50. Lower plastic. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0039] Please see Figures 1 to 10 As shown, this application embodiment provides a pole post 30 for installation in an integrated top cover plate 10. The pole post 30 includes an upper part 31 and a lower part 32. The outer diameter of the lower part 32 of the pole post 30 is larger than the outer diameter of the upper part 31 of the pole post 30 to form a stepped end face 33 between the two. A plurality of first anti-rotation protrusions 311 are provided at intervals on the periphery of the upper part 31 of the pole post 30.

[0040] The aforementioned pole post 30 has multiple first anti-rotation protrusions 311 spaced around the upper part 31 of the pole post 30. When the pole post 30 is assembled with the integrated top cover 10, the upper plastic 40 forms a snap connection at the first anti-rotation protrusions 311, thereby preventing the pole post 30 from rotating. This avoids damage to the lower part 32 of the pole post 30, thus preventing the lower part 32 of the pole post 30 from weakening its function.

[0041] This application embodiment also provides a top cover assembly, including the aforementioned pole post 30 and an integrated top cover sheet 10.

[0042] Specifically, the integrated top cover 10 includes a top cover 11, which has a through hole 111 for mounting the pole post 30. A surrounding wall structure 12 protrudes around the through hole 111 on the outside of the top cover 11, and a barb structure 13 extends from the top of the surrounding wall structure 12. The surface of the surrounding wall structure 12 and / or the barb structure 13 is provided with a second anti-rotation boss 122 or an anti-rotation groove 121.

[0043] For example, such as Figure 2 and Figure 3 As shown, a schematic diagram of the structure of an integral top cover 10 with an anti-rotation groove 121 is presented.

[0044] For example, such as Figure 4 and Figure 5 As shown, a structural schematic diagram of an integral top cover 10 with a second anti-rotation boss 122 is presented.

[0045] In this embodiment, the top cover plate 11, the wall structure 12, the barb structure 13, and the second anti-rotation boss 122 are integrally formed, and / or the top cover plate 11, the wall structure 12, the barb structure 13, and the anti-rotation groove 121 are integrally formed.

[0046] The aforementioned top cover assembly, by setting an integrally formed top cover piece 11, a wall structure 12, a barb structure 13, and an anti-rotation groove 121 (or a second anti-rotation boss 122), can improve the structural stability of the assembled top cover assembly and secondary battery through the barb structure 13, and can also use the anti-rotation groove 121 (or the second anti-rotation boss 122) to prevent the upper plastic 40 from rotating, thereby improving the overall structural stability.

[0047] It should be noted that during assembly, the terminal post 30 can be inserted into the enclosure structure 12 from top to bottom or from bottom to top. As an example, when the terminal post 30 is inserted into the enclosure structure 12 from top to bottom, the following relationship holds: R0 < R1 < R2. Where R0 is the diameter of the through hole 111, R1 is the maximum outer diameter of the terminal post 30, and R2 is the middle diameter of the barb structure 13. This configuration improves manufacturing efficiency and reduces costs, while also enhancing the structural stability of the assembled top cover assembly and the secondary battery.

[0048] In some embodiments, on the inner side of the enclosure structure 12, the top cover 11 is provided with a support surface 112 for placing the sealing gasket 20, and on the inner side of the support surface 112, a step structure 113 for connecting the lower plastic 50 is also provided.

[0049] In some embodiments, the integrated top cover 10, sealing gasket 20 and pole post 30 are fixed together by filling with plastic 40.

[0050] As an example, the upper plastic 40 can also extend to the outer side of the fence structure 12, for example... Figure 10 As shown.

[0051] This application also provides a secondary battery, including the aforementioned terminal post 10 or top cover assembly. For example, the secondary battery is a lithium-ion battery.

[0052] The aforementioned terminal post 30, top cover assembly, and secondary battery can improve the structural stability of the assembled top cover assembly and secondary battery through the barbed structure 13. Furthermore, the anti-rotation groove 121 (or the second anti-rotation protrusion 122) and the first anti-rotation protrusion 311 can prevent the upper plastic 40 and terminal post 30 from rotating, thereby improving the overall structural stability and avoiding damage to the lower part 32 of the terminal post 30, thus preventing the weakening of the function of the terminal post 30.

[0053] 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 pole post for installation in an integrated top cover plate, characterized in that, The pole post includes an upper part and a lower part. The outer diameter of the lower part of the pole post is larger than the outer diameter of the upper part of the pole post to form a stepped end face between the two. A plurality of first anti-rotation protrusions are provided at intervals on the circumference of the upper part of the pole post.

2. A top cover assembly, characterized in that, Includes the pole post and integrated top cover sheet as described in claim 1; The integrated top cover includes: a top cover, the top cover having a through hole for installing the pole post, a surrounding wall structure protruding around the through hole on the outside of the top cover, and a barb structure extending from the top of the surrounding wall structure; The surface of the wall structure and / or the barb structure is provided with a second anti-rotation protrusion or anti-rotation groove; The top cover, the wall structure, the barb structure, and the second anti-rotation boss are integrally formed, and / or the top cover, the wall structure, the barb structure, and the anti-rotation groove are integrally formed.

3. A top cover assembly according to claim 2, characterized in that, On the inner side of the wall structure, the top cover is provided with a support surface for placing a sealing gasket, and on the inner side of the support surface, there is also a stepped structure for connecting the lower plastic.

4. A top cover assembly according to claim 3, characterized in that, The integrated top cover, the sealing gasket, and the pole are fixed together by filling with plastic.

5. A secondary battery, characterized in that, It includes the pole as described in claim 1 or the top cover assembly as described in any one of claims 2 to 4.

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