Integrated top cover sheet, top cover assembly and secondary battery

Abstract

The utility model discloses an integrated top cover piece, a top cover assembly and a secondary battery, the integrated top cover piece comprises a top cover piece, the top cover piece is provided with a through hole for mounting a pole, the outer side of the through hole of the top cover piece is convexly provided with an enclosing wall structure around the through hole, and the top of the enclosing wall structure extends to form a barb structure; a plurality of tooth-shaped grooves used for preventing the upper plastic from rotating are further formed in the inner side face of the barb structure, and the tooth-shaped grooves are distributed along the inner side of the barb structure at intervals. The top cover piece, the enclosing wall structure, the barb structure and the tooth-shaped groove are integrally formed. According to the integrated top cover piece, the top cover assembly and the secondary battery provided by the embodiment of the invention, by arranging the top cover piece, the enclosing wall structure, the barb structure and the tooth-shaped groove which are integrally formed, not only can the structural stability of the assembled top cover assembly and the secondary battery be improved, but also the upper plastic can be prevented from rotating, and the forming difficulty of the integrated top cover piece is reduced; therefore, the overall structural stability is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of secondary batteries, and particularly relates to an integrated top cover sheet, a top cover assembly and a secondary battery. BACKGROUND

[0002] A Chinese patent with the publication number CN114497839A discloses an integrated lithium battery top cover sheet. The edge of the electrode through hole is integrally formed with an upper convex annular clamping ring. During production and assembly, the annular clamping ring can be turned inward to tightly press the electrode assembly such as the insulating ring, the electrode pressing plate and the sealing gasket in the electrode through hole for sealing cooperation. No welding is required. The assembly process is simplified, and the production efficiency is improved. Even when the working condition temperature changes dramatically, the deformation and scaling amount of the sealing cooperation structure is very small, and there is no risk of leakage. The safety and reliability of the sealing structure are greatly improved.

[0003] However, although the above technology brings many advantages, in actual application, when the upper plastic is sealed, the upper plastic is prone to rotation, resulting in unstable structure of the assembled top cover assembly. CONTENT OF THE UTILITY MODEL

[0004] One of the purposes of the application is to provide an integrated top cover sheet, a top cover assembly and a secondary battery for preventing the upper plastic from rotating to improve the overall structural stability.

[0005] To achieve the above application purposes, the technical solutions adopted by the application are as follows:

[0006] The embodiment of the application provides an integrated top cover sheet, which comprises a top cover sheet. The top cover sheet is provided with a through hole for mounting a pole. A wall structure is provided on the outer side of the through hole of the top cover sheet around the through hole. A barb structure is extended at the top of the wall structure.

[0007] A plurality of tooth-shaped grooves for preventing the upper plastic from rotating are further provided on the inner side of the barb structure. The plurality of tooth-shaped grooves are distributed at intervals along the inner side of the barb structure.

[0008] The top cover sheet, the wall structure, the barb structure and the tooth-shaped grooves are integrally formed.

[0009] Optionally, a support surface for placing a sealing gasket is provided on the inner side of the wall structure. A step structure for connecting the lower plastic is further provided on the inner side of the support surface.

[0010] The embodiment of the application provides a top cover assembly, which comprises the above-mentioned integrated top cover sheet, the sealing gasket and the pole. The integrated top cover sheet, the sealing gasket and the pole are fixed by filling the upper plastic.

[0011] The embodiment of the application provides a secondary battery, which comprises the above-mentioned integrated top cover sheet.

[0012] Compared with the prior art, the application has the beneficial effects that:

[0013] The integral top cover sheet, the top cover assembly and the secondary battery provided by the application have the wall structure, the barb structure and the tooth-shaped groove, which can improve the structural stability of the assembled top cover assembly and the secondary battery through the barb structure, prevent the upper plastic from rotating through the tooth-shaped groove arranged on the inner side of the barb structure, and reduce the molding difficulty of the integral top cover sheet, thereby improving the overall structural stability. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0015] Figure 1 The structure schematic diagram of the integral top cover sheet provided by the application is shown;

[0016] Figure 2 The enlarged schematic diagram of A in Figure 1 is shown;

[0017] Figure 3 The top view of Figure 1 is shown;

[0018] Figure 4 The A-A sectional view of Figure 3 is shown;

[0019] Figure 5 The enlarged schematic diagram of B in Figure 4 is shown;

[0020] Figure 6 The exploded view of the top cover assembly provided by the application is shown;

[0021] Figure 7 The sectional view of the top cover assembly provided by the application is shown.

[0022] FIGURE DESCRIPTION:

[0023] 10, integral top cover sheet; 11, top cover sheet; 111, through hole; 112, support surface; 113, step structure; 12, wall structure; 13, barb structure; 131, tooth-shaped groove; 20, sealing ring; 30, pole; 40, upper plastic; 50, lower plastic. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, further detailed description will be given below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, and not to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0027] In order to illustrate the technical solutions described in the present application, specific embodiments will be described below.

[0028] Please refer to Figures 1 to 7 As shown in the drawings, the embodiment of the present application provides an integrated top cover sheet 10, which comprises a top cover sheet 11, the top cover sheet 11 is provided with a through hole 111 for mounting a pole 30, and a wall structure 12 is protruded around the through hole 111 on the outer side of the through hole of the top cover sheet 11, and a barb structure 13 is extended on the top of the wall structure 12.

[0029] A plurality of toothed grooves 131 for preventing the upper plastic 40 from rotating are further arranged on the inner side surface of the barb structure 13, and the plurality of toothed grooves 131 are distributed at intervals along the inner side of the barb structure 13. The top cover sheet 11, the wall structure 12, the barb structure 13 and the toothed grooves 131 are integrally formed.

[0030] The integrated top cover sheet 10 described above sets the toothed grooves 131 on the inner side surface of the barb structure 13 instead of the upper and lower surfaces, which can make the subsequent formed upper plastic 40 form a buckle connection here, thereby preventing the upper plastic 40 from rotating. Moreover, compared with being arranged at other places (such as the surface of the wall structure 12 or the lower surface of the barb structure 13), setting the toothed grooves 131 here can reduce the difficulty of forming the integrated top cover sheet, and can avoid thinning of the wall structure 12 and increase the aesthetic degree of the overall structure.

[0031] It should be noted that when assembling, the pole 30 can be put into the wall structure 12 from top to bottom, or from bottom to top. As an example, when the pole 30 is put into the wall structure 12 from top to bottom, the following relationship is established: R0

[0032] In some embodiments, on the inner side of the wall structure 12, the top cover sheet 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 further provided.

[0033] The embodiment of the present application further provides a top cover assembly, which comprises the above-mentioned integrated top cover sheet 10, sealing gasket 20 and pole 30, and the integrated top cover sheet 10, sealing gasket 20 and pole 30 are fixed through the filling of the upper plastic 40.

[0034] As an example, the upper plastic 40 can also extend to the outer side of the wall structure 12, for example Figure 7 as shown.

[0035] The embodiment of the present application further provides a secondary battery, which comprises the above-mentioned integrated top cover sheet 10. For example, the secondary battery is a lithium ion battery.

[0036] The above-mentioned integrated top cover sheet 10, top cover assembly and secondary battery, by setting the integrated top cover sheet 11, wall structure 12, hook structure 13 and tooth-shaped groove 131, not only can improve the structural stability of the assembled top cover assembly and secondary battery through the hook structure 13, but also can prevent the upper plastic 40 from rotating and reduce the difficulty of forming the integrated top cover sheet by using the characteristics of the tooth-shaped groove 131 provided on the inner side of the hook structure 13, thereby improving the overall structural stability and increasing the overall structural beauty.

[0037] The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A one-piece top cover sheet, characterized in that, Includes a top cover plate, the top cover plate having a through hole for installing an electrode post, a surrounding wall structure protruding around the through hole on the outside of the top cover plate, and a barb structure extending from the top of the surrounding wall structure; The inner side of the barb structure is also provided with a plurality of toothed grooves for preventing the upper plastic from rotating, and the plurality of toothed grooves are distributed at intervals along the inner side of the barb structure; The top cover, the wall structure, the barb structure, and the toothed groove are integrally formed.

2. The integrated top cover sheet according to claim 1, 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.

3. A top cover assembly, characterized in that, It includes the integrated top cover, sealing gasket, and pole as described in claim 1 or 2, wherein the integrated top cover, the sealing gasket, and the pole are fixed together by filling with plastic.

4. A secondary battery, characterized in that, Includes the one-piece top cover sheet as described in claim 1 or 2.

Images