Secondary battery top cover

Abstract

The utility model provides a secondary battery top cover which comprises a top cover sheet, lower plastic cement is assembled on the back surface of the top cover sheet, and through mounting holes are formed in the top cover sheet and the lower plastic cement; a pole assembly is mounted in the mounting hole; a turnover ring is arranged on the surface of the top cover sheet, is turned over towards the direction of the pole component and is used for preventing the pole component from moving upwards; a plurality of rotation stopping holes are formed in the side wall of the turnover ring, and the rotation stopping holes are connected with the pole column assembly in a clamping manner; according to the utility model, the pole is assembled in the mounting hole through the sealing ring, then the plastic cement is injected between the pole and the turnover ring, the pole assembly is fixedly clamped on the mounting hole through the turnover ring, and then the pole assembly is inserted into the insertion column of the upper plastic cement through the rotation stopping hole in the turnover ring, so that the gap between the pole and the turnover ring is filled with the upper plastic cement; and the insertion column is tightly matched with the rotation stopping hole, so that the pole assembly is stably fixed on the top cover plate, and the pole assembly can be prevented from rotating relative to the top cover plate.

Description

Technical Field

[0001] The utility model relates to the field of lithium ion batteries, in particular to a secondary battery top cover. Background Art

[0002] With the development of new energy, the requirements for energy density of existing batteries are further improved. New energy power batteries are usually secondary batteries, which means that after the battery is discharged, the active material can be activated by charging and the battery can continue to be used.

[0003] A Chinese utility model patent with announcement number CN219419260U discloses a cover plate assembly and a battery, a cover plate assembly comprising a top cover plate and a first insulating member, the top cover plate being provided with a mounting hole; a pole being mounted in the mounting hole; a first end being provided with a folding portion, folded toward the center of the mounting hole; an axial inner wall of the mounting hole being provided with a first fixing portion; a first insulating member being clamped between the pole and the mounting hole, the folding portion abutting against the first insulating member; a second fixing portion being provided on the axial outer peripheral surface of the first insulating member, the first fixing portion being fixedly matched with the second fixing portion so that the first insulating member is fixedly connected to the mounting hole.

[0004] In the above patent, due to the limitation of the connection method between the pole assembly and the top cover sheet, the pole assembly is prone to rotate relative to the top cover sheet.

[0005] To this end, we propose a secondary battery top cover to solve the problem of the pole assembly rotating relative to the top cover sheet. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings of the prior art. In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The top cover of a secondary battery comprises: a top cover sheet, the back of which is provided with a lower plastic, and through mounting holes are provided on the top cover sheet and the lower plastic; a pole assembly is installed in the mounting hole; a folding ring is provided on the surface of the top cover sheet, the folding ring is folded toward the pole assembly and is used to prevent the pole assembly from moving upward; a plurality of anti-rotation holes are provided on the side wall of the folding ring, and the anti-rotation holes are snap-fitted with the pole assembly; the pole assembly comprises a sealing ring, a pole and an upper plastic; the upper plastic is formed by injection molding around the outside of the pole, and a plug-in column matching the anti-rotation hole is formed by injection molding on the outer side wall of the upper plastic, and the pole is fixed in the mounting hole by a sealing ring, and the sealing ring keeps the top cover sheet and the pole insulated; the upper plastic is formed by injection molding between the pole and the folding ring, and is tightly snap-fitted with the plug-in column on the upper plastic through the anti-rotation hole, so as to effectively prevent the pole assembly from rotating relative to the top cover sheet.

[0008] Further preferably, the upper plastic is fixed under the folding ring by injection molding, and the plug post on the upper plastic is tightly matched with the anti-rotation hole.

[0009] Further preferably, the pole has a stepped surface, and a rotation-stopping edge is arranged on the stepped surface.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model assembles the pole in the installation hole through a sealing ring, and then injects plastic between the pole and the folding ring, fixes the pole assembly on the installation hole through the folding ring, and then plugs the plug post of the upper plastic through the anti-rotation hole on the folding ring. The upper plastic not only fills the gap between the pole and the folding ring, but also the plug post and the anti-rotation hole are tightly matched, so that the pole assembly is stably fixed on the top cover sheet, and the pole assembly can be prevented from rotating relative to the top cover sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the structure of the top cover sheet;

[0013] Figure 2 It is an explosion diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the assembly of the utility model;

[0015] Figure 4 It is a cross-sectional view of the utility model.

[0016] In the figure: top cover sheet 1, sealing ring 2, pole 3, upper plastic 4, lower plastic 5, mounting hole 11, folding ring 12, anti-rotation hole 13, waist groove 14, injection hole 15, anti-rotation edge 31, plug column 41. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Reference Figure 1-Figure 4 The secondary battery top cover comprises: a top cover sheet 1, a lower plastic 5 is assembled on the back of the top cover sheet 1, and a through mounting hole 11 is arranged on the top cover sheet 1 and the lower plastic 5; a pole assembly is installed in the mounting hole 11; a folding ring 12 is arranged on the surface of the top cover sheet 1, and the folding ring 12 is folded toward the pole assembly and used to prevent the pole assembly from moving upward; a plurality of anti-rotation holes 13 are opened on the side wall of the folding ring 12, and the anti-rotation holes 13 are clamped with the pole assembly.

[0019] In the embodiment: there are two pole assemblies, which are a positive pole assembly and a negative pole assembly respectively, there are two mounting holes 11, which are respectively arranged on both sides of the top cover sheet 1, and the folding ring 12 is a vertical ring before being folded. First, several anti-rotation holes 13 are opened on the vertical ring, and the multiple anti-rotation holes can be evenly distributed or unevenly distributed on the vertical ring. The positive pole and the negative pole are respectively installed on the mounting holes 11 on both sides, and then the vertical ring is folded toward the pole direction to form a folding ring 12 for preventing the pole from moving upward, and then the upper plastic 4 is injection molded between the pole and the folding ring 12, and the anti-rotation hole 13 is tightly engaged with the plug 41 on the upper plastic 4 to effectively prevent the pole assembly from rotating relative to the top cover sheet 1.

[0020] The pole assembly includes a sealing ring 2, a pole 3 and an upper plastic 4; the upper plastic 4 is formed by injection molding around the outside of the pole 2, and a plug 41 that cooperates with the anti-rotation hole 13 is injection molded on the outer wall of the upper plastic 4. The pole 3 is fixed in the mounting hole 11 through the sealing ring 2, and the sealing ring 2 keeps the top cover sheet 1 and the pole 3 insulated.

[0021] In the embodiment, the anti-rotation hole 13 is tightly plugged into the plug post 41 , which effectively prevents the pole assembly from rotating relative to the top cover sheet 1 .

[0022] The upper plastic 4 is fixed under the folding ring 12 by injection molding, and the plug 41 on the upper plastic 4 is tightly matched with the anti-rotation hole 13.

[0023] The pole has a stepped surface, and a rotation-stopping edge 31 is arranged on the stepped surface.

[0024] In the embodiment: the design of the anti-rotation edge 31 effectively prevents the pole 3 and the upper plastic 4 from rotating.

[0025] The utility model assembles the pole in the installation hole through a sealing ring, and then injects plastic between the pole and the folding ring, fixes the pole assembly on the installation hole through the folding ring, and then plugs the plug post of the upper plastic through the anti-rotation hole on the folding ring. The upper plastic not only fills the gap between the pole and the folding ring, but also the plug post and the anti-rotation hole are tightly matched, so that the pole assembly is stably fixed on the top cover sheet, and the pole assembly can be prevented from rotating relative to the top cover sheet.

Claims

1. A secondary battery top cover, characterized in that: include: A top cover sheet, the back of which is provided with a lower plastic, a through mounting hole is provided on the top cover sheet and the lower plastic; a pole assembly is installed in the mounting hole; a folding ring is provided on the surface of the top cover sheet, the folding ring is folded toward the pole assembly and is used to prevent the pole assembly from moving upward; a plurality of anti-rotation holes are provided on the side wall of the folding ring, and the anti-rotation holes are clamped with the pole assembly; The pole assembly comprises a sealing ring, a pole and an upper plastic; the upper plastic is formed by injection molding around the outside of the pole, and a plug-in column matching the anti-rotation hole is formed by injection molding on the outer wall of the upper plastic. The pole is fixed in the mounting hole by a sealing ring, and the sealing ring keeps the top cover sheet and the pole insulated; The upper plastic is fixed under the folding ring by injection molding, and the plug post on the upper plastic is tightly matched with the anti-rotation hole.

2. The secondary battery top cover according to claim 1, characterized in that: The pole has a stepped surface, and a rotation-stopping edge is arranged on the stepped surface.

3. The secondary battery top cover according to claim 1, characterized in that: There are multiple anti-rotation holes, and the multiple anti-rotation holes are evenly distributed or unevenly distributed.

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