Anti-twist top cover for secondary battery

Abstract

The utility model provides an anti-twist top cover for a secondary battery, which is characterized in that a turnover ring is arranged on the surface of a top cover sheet, and the turnover ring is turned over towards a pole component and is used for preventing the pole component from moving upwards; a through hole and a limiting groove are formed in the surface of the pin, the pin is connected to the bottom of the pole assembly in a clamped mode, a limiting block for preventing the pin from twisting is arranged on the side edge of the bottom of the lower plastic, and a positioning column matched with the limiting groove is arranged on the surface of the bottom of the lower plastic; according to the utility model, the pole component is fixed on the mounting hole through the folding ring, the through hole on the pin is sleeved at the bottom of the pole, the positioning column and the limiting blocks are arranged on the lower plastic, the pin is assembled at the bottom of the lower plastic and sleeved on the pole, and the limiting blocks and the positioning column on the left and right sides form a triangular structure. The pins are limited by the positioning columns and the limiting blocks on the two sides, so that the pins are effectively prevented from twisting, and the safety and reliability of the battery are improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium-ion batteries, in particular to an anti-twist top cover for secondary batteries. Background Art

[0002] At present, in order to reduce the temperature rise, the size of the tabs of square-shell power batteries is increased, and the two sides of the top cover are connected to the tabs through electrical connectors. However, the anti-rotation and anti-torsion performance of these electrical connectors is not ideal, and there is a risk of twisting. If twisting occurs, it will affect the safety inside the battery.

[0003] To this end, we propose an anti-twist top cover for a secondary battery to solve the problem of twisting risk of an electrical connector. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of the prior art. In order to achieve the above purpose, this utility model adopts the following technical solutions:

[0005] A twist-proof top cover for a secondary battery comprises: a top cover sheet, a lower plastic being assembled on the back of the top cover sheet, the top cover sheet being provided with a through mounting hole; a through avoidance hole being provided on the lower plastic, a pole assembly being mounted in the mounting hole and the avoidance hole; a folding ring being provided on the surface of the top cover sheet, the folding ring being folded toward the pole assembly and being used to prevent the pole assembly from moving upward; the pin being assembled on the bottom of the lower plastic, a through hole and a limiting groove being formed on the surface of the pin, the pin being clipped and connected to the bottom of the pole assembly, a limiting block being provided on the side of the bottom of the lower plastic to prevent the pin from twisting, and a positioning column being provided on the surface of the bottom of the lower plastic to cooperate with the limiting groove.

[0006] Further preferably, the limiting block is rectangular, and there are at least two limiting blocks, which are respectively located on both sides of the avoidance hole.

[0007] Further preferably, the pole assembly includes a sealing ring, a pole and an upper plastic; the upper plastic is formed by injection molding around the outside of the pole, the pole is fixed in the mounting hole by the sealing ring, the sealing ring insulates the top cover sheet from the pole, and the folding ring is fixed to the upper plastic by riveting and flanging.

[0008] Further preferably, the limit blocks are arranged symmetrically or staggered.

[0009] Further preferably, a plurality of clamping columns are provided on the upper surface of the lower plastic, and the clamping columns are close to the edge of the lower plastic.

[0010] Further preferably, a blind hole cooperating with the clamping column is opened on the bottom surface of the top cover piece.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model fixes the pole assembly on the mounting hole by means of a folding ring, and the through hole on the pin is sleeved on the bottom of the pole. By arranging a positioning column and a limit block on the lower plastic, the pin is assembled on the bottom of the lower plastic and sleeved on the pole. The limit blocks on the left and right sides form a triangular structure with the positioning column. The positioning column and the limit blocks on both sides limit the pin, effectively preventing the pin from twisting, and improving the safety and reliability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the explosion structure of the utility model;

[0014] Figure 2 This is a three-dimensional diagram of the back of the lower plastic;

[0015] Figure 3 This is a schematic diagram of the front assembly structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the back structure of the utility model;

[0017] Figure 5 It is a cross-sectional view of the present utility model.

[0018] In the figure: top cover 1, sealing ring 2, pole 3, upper plastic 4, lower plastic 5, pin 6, mounting hole 11, folding ring 12, clamping column 51, avoidance hole 52, positioning column 53, limit block 54, through hole 61, limit groove 62. DETAILED DESCRIPTION

[0019] 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 the embodiments.

[0020] Reference Figure 1-Figure 5 , a twist-proof top cover for a secondary battery, comprising: a top cover sheet 1, a lower plastic 5 is assembled on the back of the top cover sheet 1, the top cover sheet 1 is provided with a through mounting hole 11; the lower plastic 5 is provided with a through avoidance hole 52, and a pole assembly is mounted in the mounting hole 11 and the avoidance hole 52; a folding ring 12 is provided on the surface of the top cover sheet 1, and the folding ring 12 is folded toward the pole assembly and is used to prevent the pole assembly from moving upward; the pin is assembled on the bottom of the lower plastic, a through hole 61 and a limiting groove 62 are opened on the surface of the pin 6, the pin 6 is snap-connected to the bottom of the pole assembly, the side edge of the bottom of the lower plastic 5 is provided with a limiting block 54 to prevent the pin 6 from twisting, and the bottom surface of the lower plastic 5 is provided with a positioning column 53 that cooperates with the limiting groove 62.

[0021] 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 provided on both sides of the top cover sheet 1. The positive pole assembly and the negative pole assembly are respectively installed on the mounting holes 11 on both sides. A folding ring 12 is formed by folding toward the pole assembly, and the folding ring 12 is used to prevent the pole assembly from moving upward; the lower plastic 5 is assembled on the bottom of the top cover sheet 1 through the clamping column 51, and the pin 6 is clamped and fixed to the bottom of the pole 3. By providing a positioning column 53 and a limit block 54 on the lower plastic 5, the limit blocks 54 on the left and right sides form a triangular structure with the positioning column 53, and the positioning column 53 and the limit blocks 54 on both sides realize the limitation of the pin 6, effectively preventing the pin 6 from twisting, and improving the safety and reliability of the battery.

[0022] The limiting blocks 54 are rectangular, and there are at least two limiting blocks 54 , which are respectively located on both sides of the avoidance hole 52 . The limiting blocks 54 are symmetrical or staggered.

[0023] In an embodiment, one or more limit blocks 54 are respectively provided on both sides of the avoidance hole 52, and the limit blocks 54 on both sides constitute one or more pairs, with the center line of the plastic below as the central axis. The multiple pairs of limit blocks 54 can be symmetrically arranged in the transverse direction or staggered, and the multiple pairs of limit blocks 54 can be symmetrically arranged in the longitudinal direction or staggered.

[0024] 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 3, and the pole 3 is fixed in the mounting hole 11 by the sealing ring 2. The sealing ring 2 insulates the top cover sheet 1 from the pole 3, and the folding ring 12 is fixed to the upper plastic 4 by riveting and flanging.

[0025] In the embodiment, the pole 3 has a stepped surface, and the maximum diameter of the outer wall of the pole 3 is larger than the diameter of the mounting hole 11 , that is, the pole 3 and the maximum side wall of the upper plastic 4 are clamped between the mounting hole 11 and the folding ring 12 .

[0026] A plurality of clamping columns 51 are provided on the upper surface of the lower plastic 4 , and the clamping columns 51 are close to the edge of the lower plastic 5 ; a blind hole is opened on the bottom surface of the top cover 1 to match the clamping columns 51 .

[0027] In the embodiment, the clamping column 51 is a stepped column, and the lower plastic 4 is clamped and fixed to the blind hole on the bottom surface of the top cover plate 1 through the clamping column 51 .

[0028] The utility model fixes the pole assembly on the mounting hole by means of a folding ring, and the through hole on the pin is sleeved on the bottom of the pole. By arranging a positioning column and a limit block on the lower plastic, the pin is assembled on the bottom of the lower plastic and sleeved on the pole. The limit blocks on the left and right sides form a triangular structure with the positioning column. The positioning column and the limit blocks on both sides limit the pin, effectively preventing the pin from twisting, and improving the safety and reliability of the battery.

Claims

1. An anti-twist top cover for a secondary battery, characterized in that: include: A top cover sheet, the back of which is provided with a lower plastic, the top cover sheet is provided with a through mounting hole; the lower plastic is provided with a through avoidance hole, the mounting hole and the avoidance hole are provided with a pole assembly; 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; The pin is assembled on the lower plastic bottom, a through hole and a limit groove are opened on the pin surface, the pin is clamped and connected to the bottom of the pole assembly, a limit block is provided on the side of the lower plastic bottom to prevent the pin from twisting, and a positioning column is provided on the surface of the lower plastic bottom to cooperate with the limit groove.

2. The anti-twist top cover for a secondary battery according to claim 1, characterized in that: The limiting block is rectangular, and there are at least two limiting blocks, which are respectively located on both sides of the avoidance hole.

3. The anti-twist top cover for a secondary battery according to claim 1, characterized in that: The pole assembly includes a sealing ring, a pole and an upper plastic; the upper plastic is formed by injection molding around the outside of the pole, the pole is fixed in the mounting hole through the sealing ring, the sealing ring insulates the top cover sheet from the pole, and the folding ring is fixed to the upper plastic by riveting and flanging.

4. The anti-twist top cover for a secondary battery according to claim 2, characterized in that: The limit blocks are arranged symmetrically or staggered.

5. The anti-twist top cover for a secondary battery according to claim 1, characterized in that: A plurality of clamping columns are arranged on the upper surface of the lower plastic, and the clamping columns are close to the edge of the lower plastic.

6. The anti-twist top cover for a secondary battery according to claim 5, characterized in that: The bottom surface of the top cover sheet is provided with a blind hole matched with the clamping column.

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