Stud structure of square battery cell

Abstract

The utility model provides a double-screw bolt structure of a square battery cell, which comprises a connecting part capable of being welded on a pole of the square battery cell through laser, the connecting part is integrally formed by a base, a lap joint seat and a threaded column body, the lap joint seat is arranged between the base and the threaded column body, and the lap joint seat is arranged on the threaded column body. The base, the lap joint base and the threaded column are all of a column structure, and the diameters of the bases, the lap joint base and the threaded column are sequentially decreased in a stepped mode. According to the utility model, the connecting part is made into a step shape, the base is used for welding, and the lap joint seat is used for lap joint with the short-circuit bar; the welding area of the base is large enough, the welding requirement can be met, welding is firm, the contact face and the welding face of the step-shaped structure are separated and do not affect each other, the lap joint face is flat and smooth and makes full contact with the short circuit bar, the overcurrent capacity is improved, and temperature rise is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a square electric core's stud structure. BACKGROUND

[0002] It is known that with the vigorous development of new energy vehicles, the demand for lithium batteries is increasing, and lightweight requirements are highlighted. In order to meet the lightweight requirements and improve the energy density of the battery module, laser welding technology has become a mainstream trend. The process of the electric core has also changed from the original bolt locking process to laser welding process. Welding studs on the electric core pole of the square electric core has become a new market demand.

[0003] Chinese document CN215220943U discloses a stud structure suitable for square electric core, which comprises a base capable of being welded on the pole of the square electric core by laser and a threaded column body integrally formed on the base, and an annular groove is formed on the base to improve the absorption of laser energy by the base when laser is shot.

[0004] In the above-mentioned patent, after the base is welded with the pole, the surface of the base is uneven with weld pits, and when the short-circuit row contacts the base, it will cause insufficient contact and affect the overcurrent capacity.

[0005] Therefore, we propose a stud structure for square electric core to solve the problem of incomplete contact caused by surface weld pits. UTILITY MODEL CONTENTS

[0006] The utility model discloses a kind of stud structures for square electric core to solve the problem of incomplete contact caused by surface weld pits.

[0007] A stud structure for square electric core, comprising a connecting component capable of being welded on the pole of the square electric core by laser, the connecting component is integrally formed by a base, a lap joint seat and a threaded column body, the lap joint seat is arranged between the base and the threaded column body, the base, the lap joint seat and the threaded column body are all column body structures, and the diameters are sequentially stepped decreasing;The connecting component is made into ladder shape in the utility model, the base is used for welding, and the lap joint seat is used for lap joint with short-circuit row;The contact surface of ladder-shaped structure is separated from welding surface, and does not affect each other, and the lap joint surface is smooth and flat, fully contacts with short-circuit row, improves overcurrent capacity, and reduces temperature rise.

[0008] Further preferably, the base, the lap joint seat and the threaded column body are coaxially arranged.

[0009] Further preferably, the threaded column body is provided with a threaded structure on the outer peripheral surface.

[0010] Further preferably, the upper surface of the lap joint seat is a plane.

[0011] More preferably, the diameter of the base is smaller than the length and width of the pole post.

[0012] More preferably, the height of the lap joint is greater than the height of the weld mark produced by laser welding.

[0013] More preferably, the connecting component is integrally formed from aluminum alloy material.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention makes the connecting parts into a stepped shape, with the base for welding and the overlap seat for overlapping with the shorting busbar. The welding area of ​​the base is large enough to meet the welding requirements and the welding is firm. The contact surface and welding surface of the stepped structure are separate and do not affect each other. Moreover, the overlap surface is flat and smooth, fully contacting the shorting busbar, improving the current carrying capacity and reducing the temperature rise. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a square battery cell.

[0017] Figure 2 This is a structural schematic diagram of the connecting components;

[0018] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 4 This is an assembly diagram of the present invention.

[0020] In the diagram: 1 square battery cell, 11 terminal post, 2 connecting component, 3 shorting bar, 21 base, 22 connecting seat, 23 threaded column. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 A stud structure for a square battery cell includes a connecting component 2 that can be laser-welded to the terminal post 11 of the square battery cell 1. The connecting component 2 is integrally formed from a base 21, a lap seat 22, and a threaded column 23. The lap seat 22 is disposed between the base 21 and the threaded column 23. The base 21, the lap seat 22, and the threaded column 23 are all column structures, and their diameters decrease in a stepped manner.

[0023] In the embodiment, the connecting component 2 is welded on the pole 11 by laser, the base 21 of the connecting component 2 is welded on the pole 11 by laser, the through hole of the short-circuiting row 3 is sleeved on the threaded column 23, the lower surface of the short-circuiting row 3 is supported on the surface of the overlapping seat 22, and the short-circuiting row 3 is locked and fixed by the nut.

[0024] The base is used for welding, and the overlapping seat is used for overlapping with the short-circuiting row.

[0025] The base 21, the overlapping seat 22 and the threaded column 23 are coaxially arranged.

[0026] In the embodiment, the base 21, the overlapping seat 22 and the threaded column 23 are coaxially and integrally formed, the coaxial arrangement of the base 21 and the overlapping seat 22 facilitates the welding of the base 21 and the column 23, and the coaxial arrangement of the overlapping seat 22 and the threaded column 23 facilitates the support of the surface of the overlapping seat 22 on the short-circuiting row 3.

[0027] The threaded structure is arranged on the outer circumferential surface of the threaded column 23.

[0028] In the embodiment, the threaded structure on the outer circumferential surface is matched with the nut to lock and fix the short-circuiting row 3.

[0029] The upper surface of the overlapping seat 22 is a plane.

[0030] In the embodiment, the upper surface of the overlapping seat 22 is a plane, so that the short-circuiting row 3 fully contacts the overlapping seat 22, the overcurrent capacity is improved, and the temperature rise is reduced.

[0031] The diameter of the base 21 is smaller than the length and width of the pole 11.

[0032] In the embodiment, the diameter of the base 21 is smaller than the length and width of the pole 11, so that the base 21 is conveniently welded and fixed on the pole 11.

[0033] The height of the overlapping seat 22 is greater than the height of a welding mark generated by laser welding.

[0034] In the embodiment, the height of the overlapping seat 22 is greater than the height of the welding mark, so that the welding mark does not affect the contact between the short-circuiting row 3 and the overlapping seat 22, and the short-circuiting row 3 fully contacts the overlapping seat 22.

[0035] The connecting component 2 is integrally formed by an aluminum alloy material.

[0036] In the embodiment, the connecting component 2 is integrally processed and formed by a 6-series aluminum alloy material, the surface of the connecting component 2 is plated with nickel, the surface hardness and the conductivity are strengthened, the hardness of the whole connecting component can meet the locking requirements in the subsequent use process. Specifically, the stud structure can be configured to be capable of being matched and locked with an M6 nut, and meanwhile, the connecting component 2 is integrally processed and formed by the 6-series aluminum alloy material, so that the locking torque value of the stud can be greater than or equal to 6N.

[0037] The connecting component is made into a stepped shape, the base is used for welding, and the lapping seat is used for lapping with the short-circuiting row; the base has a large enough welding area, can meet the welding requirements, is firmly welded, the contact surface and the welding surface of the stepped structure are separated, do not affect each other, and the lapping surface is smooth and flat, fully contacts the short-circuiting row, improves the overcurrent capacity, and reduces the temperature rise.

Claims

1. A stud structure of a square-shaped battery cell, characterized by, The application relates to a connecting component capable of being welded on a pole of a square battery cell by laser, which is integrally formed by a base, a lap joint base and a threaded column, the lap joint base is arranged between the base and the threaded column, the base, the lap joint base and the threaded column are all column structures, and the diameters are gradually reduced in a stepped manner.

2. The stud structure of a square cell according to claim 1, wherein The base, the lap joint base and the threaded column are coaxially arranged.

3. The stud structure of a square cell according to claim 2, wherein A threaded structure is arranged on the outer circumferential surface of the threaded column.

4. The stud structure of a square cell according to claim 1, wherein The upper surface of the lap joint base is a plane.

5. The stud structure of a square cell according to claim 1, wherein The diameter of the base is smaller than the length and width of the pole.

6. The stud structure of a square cell according to claim 1, wherein The The height of the lap joint base is greater than the height of a welding mark generated by laser welding.

7. The stud structure of a square cell according to claim 1, wherein The The connecting component is integrally processed and formed by an aluminum alloy material.

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