CN209071489U - A lithium battery connector - Google Patents

Abstract

The utility model discloses a lithium battery connecting piece, which comprises a first connecting piece and a plurality of second connecting pieces, wherein the second connecting pieces are fixedly connected with the first connecting piece, the second connecting pieces are positioned at the same side of the first connecting piece and form a fin-shaped structure, and the planes of the second connecting pieces are vertical to the same plane; the utility model discloses in, the lithium battery connecting piece that provides, first connection piece are used for being connected with utmost point post, and a plurality of second connection pieces are used for with roll up a core utmost point ear and be connected, have great area of contact between a plurality of second connection pieces and the roll core utmost point ear to second connection piece and roll up have stronger ability of overflowing between the core utmost point ear, satisfy the requirement of power electricity core heavy current quick charge-discharge.

Description

A lithium battery connector

technical field

The utility model relates to the technical field of lithium batteries, in particular to a lithium battery connector.

Background technique

Lithium batteries are widely used in electric vehicles, backup power systems, and microgrid energy storage systems due to their high energy density and long life. Directly welded together by laser welding, usually there is a connecting piece with a thickness of a few tenths of a millimeter between the core tab and the pole. The connecting piece and the tab are connected by ultrasonic welding, and the connecting piece and the pole are connected by laser. weld.

However, most of the positive and negative electrode tabs are located at one end of the top cover, the area of the connection between the tabs and the connecting piece is small, and the overcurrent capability is weak, which cannot meet the requirements of high-current fast charging and discharging of power cells.

Utility model content

In order to solve the technical problems existing in the background technology, the utility model proposes a lithium battery connector.

A lithium battery connecting piece proposed by the utility model comprises a first connecting piece and a plurality of second connecting pieces;

The plurality of second connecting pieces are fixedly connected with the first connecting piece, the plurality of second connecting pieces are located on the same side of the first connecting piece and form a fin-like structure, and the planes on which the plurality of second connecting pieces are located are perpendicular to the same plane.

Preferably, the thickness of the first connecting piece is greater than the thickness of the second connecting piece.

Preferably, the first connecting piece includes a first welding part and a second welding part which are integrally formed, the first welding part is fixedly connected with the plurality of second connecting pieces, and the second welding part is used for connecting with the pole.

Preferably, the plurality of first connecting pieces are connected to the first connecting pieces by ultrasonic welding.

Preferably, the edges of the plurality of second connecting pieces are fixedly connected with the first connecting pieces.

Preferably, the middle portions of the plurality of second connecting pieces are fixedly connected with the first connecting pieces.

Preferably, the first connecting piece and the plurality of second connecting pieces are made of copper or aluminum material.

In the proposed lithium battery connector, the first connecting piece is used for connecting with the pole, a plurality of second connecting pieces are used for connecting with the winding core tab, and the plurality of second connecting pieces are connected with the winding core tab There is a large contact area between them, so that the second connecting piece and the winding core tab have a strong overcurrent capability, which meets the requirements of high current and fast charging and discharging of the power cell.

Description of drawings

1 is a schematic structural diagram of a lithium battery connector proposed by the utility model;

FIG. 2 is a schematic structural diagram of a lithium battery connector and a pole connected by the utility model;

FIG. 3 is a schematic structural diagram of a lithium battery connector provided by the utility model connected with the winding core tab.

Detailed ways

As shown in Figures 1-3, Figure 1 is a schematic structural diagram of a lithium battery connector proposed by the present invention, and Figure 2 is a structural schematic diagram of a lithium battery connector proposed by the present invention connected to a pole. 3 is a schematic diagram of the structure of a lithium battery connecting piece proposed by the utility model connected with the winding core tabs.

Referring to FIG. 1 , a lithium battery connector proposed by the present utility model includes a first connecting piece 1 and a plurality of second connecting pieces 2 ;

A plurality of second connecting pieces 2 are fixedly connected with the first connecting piece 1, a plurality of second connecting pieces 2 are located on the same side of the first connecting piece 1 and form a fin-like structure, and the planes where the plurality of second connecting pieces 2 are located are perpendicular to the same flat.

Referring to FIG. 2 , the two first connecting pieces 1 are welded to the positive and negative poles on the cover plate by laser welding.

Referring to FIG. 3 , the plurality of second connecting pieces 2 in the two connecting pieces are respectively welded with the positive and negative electrodes of the winding core by ultrasonic welding, and there are relatively small gaps between the plurality of second connecting pieces 2 and the tabs of the winding core. Large contact area, so that the second connecting piece 2 and the winding core tab have a strong overcurrent capability, which meets the requirements of fast charging and discharging of power cells with large currents.

In this embodiment, the thickness of the first connecting piece 1 is greater than the thickness of the second connecting piece 2 .

The first connecting piece 1 includes a first welding portion 11 and a second welding portion 12 that are integrally formed. The first welding portion 11 and the plurality of second connecting pieces 2 are connected together by ultrasonic welding. The second connecting piece 2 is pre-welded together by low-power ultrasonic welding, and then the pre-welded second connecting piece 2 is welded on the first connecting piece 1 using high-power ultrasonic welding, and the second welding part 12 is used for connecting with the pole Column welding.

In this embodiment, the plurality of second connecting pieces 2 are strip-shaped, the middle portions of the plurality of second connecting pieces 2 are fixedly connected to the first connecting piece 1 , and the plurality of second connecting pieces 2 are arranged in a fan shape.

In another design manner, the edges of the plurality of second connecting pieces 2 are fixedly connected to the first connecting piece 1 , which can also form a fin-like structure.

In this embodiment, the first connecting piece 1 and the plurality of second connecting pieces 2 are made of copper, and can also be made of aluminum.

The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (7)

1. A lithium battery connector, characterized in that it comprises a first connecting piece (1) and a plurality of second connecting pieces (2); A plurality of second connecting pieces (2) are fixedly connected to the first connecting piece (1), a plurality of second connecting pieces (2) are located on the same side of the first connecting piece (1) and form a fin-like structure, and a plurality of second connecting pieces (2) are located on the same side of the first connecting piece (1). The plane where the connecting piece (2) is located is perpendicular to the same plane. 2 . The lithium battery connector according to claim 1 , wherein the thickness of the first connecting piece ( 1 ) is greater than the thickness of the second connecting piece ( 2 ). 3 . 3 . The lithium battery connector according to claim 1 , wherein the first connecting piece ( 1 ) comprises a first welding part ( 11 ) and a second welding part ( 12 ) which are integrally formed, and the first welding part ( 11) It is fixedly connected with a plurality of second connecting pieces (2), and the second welding part (12) is used for connecting with the pole post. 4 . The lithium battery connector according to claim 1 , wherein the plurality of first connecting pieces ( 1 ) are connected to the second connecting pieces ( 2 ) by ultrasonic welding. 5 . 5 . The lithium battery connector according to claim 1 , wherein the edges of the plurality of second connecting pieces ( 2 ) are fixedly connected to the first connecting pieces ( 1 ). 6 . 6 . The lithium battery connector according to claim 1 , wherein the middle portions of the plurality of second connecting pieces ( 2 ) are fixedly connected to the first connecting pieces ( 1 ). 7 . 7 . The lithium battery connector according to claim 1 , wherein the first connecting piece ( 1 ) and the plurality of second connecting pieces ( 2 ) are made of copper or aluminum material. 8 .