CN206022497U - a connection structure - Google Patents

Abstract

The utility model belongs to the technical field of the battery, in particular to connection structure, a connection structure, including first connection piece and second connection piece, first connection piece is copper sheet or aluminum sheet, the second connection piece is nickel piece or silver piece, first connection piece include hard connection part and with the soft connection part that hard connection part connects, second connection piece hot-pressing weld in the hard connection part of first connection piece. The welding mode of first connecting piece and second connecting piece does: macromolecule diffusion welding or other heating methods hot-pressing welding, through cylinder or pneumatic cylinder pressure welding's hot-pressing welding's mode, make the utility model discloses under the condition that does not add any auxiliary agent, with nickel piece or silver piece welding to the surface of first connecting piece, make power battery circuit connection at last and use soft or hard connection structure, guarantee good electric conductive property like this, solve battery electrode copper and change aluminium or aluminium and change the difficult problem of copper.

Description

a connection structure

technical field

The utility model belongs to the technical field of batteries, in particular to a connection structure.

Background technique

Aluminum flexible connections, or Bus-Bar, are used in existing power batteries. In order to connect with the copper electrodes of the battery, it is necessary to plate a nickel or silver layer on the aluminum flexible connection (Bus-Bar), but because of the electroplating treatment It is partial plating, because the price of partial plating is high, and the thickness and color of the electroplating layer are unstable.

Based on this, the industry has developed a welding product of aluminum foil + nickel sheet, so that there is no need to perform electroplating on the aluminum soft connection (Bus-Bar), which saves time, reduces costs, and improves stability.

Utility model content

The purpose of the utility model is to provide a connection structure aiming at the deficiencies of the prior art, which solves the technical problems of high electroplating treatment cost, time-wasting and poor stability in the prior art.

In order to achieve the above object, the utility model adopts the following technical solutions:

A connecting structure, comprising a first connecting sheet and a second connecting sheet, the first connecting sheet is a copper sheet or an aluminum sheet, the second connecting sheet is a nickel sheet or a silver sheet, and the first connecting sheet includes a hard The connection part and the soft connection part connected with the hard connection part, the second connection piece is thermocompression welded to the hard connection part of the first connection piece. The welding method of the first connecting piece and the second connecting piece is: polymer diffusion welding or other heating method hot-press welding (heating method includes but not only electrode heating, electric heating wire heating, carbon rod heating, etc.), through the cylinder or hydraulic pressure The thermocompression welding method of cylinder pressure welding enables the utility model to weld the nickel sheet or silver sheet to the surface of the first connecting sheet without adding any additives, and finally make a soft and hard connection for power battery circuit connection structure, which ensures good electrical conductivity and solves the problem of copper-to-aluminum or aluminum-to-copper battery electrodes.

As an improvement of the connecting structure described in the present invention, the first connecting piece is formed by thermocompression welding of at least two layers of copper or aluminum sheets, and the thickness of each layer is 0.05-0.25mm.

As an improvement of the connection structure described in the present invention, the hard connection part has a connection hole.

As an improvement of the connection structure described in the present invention, the soft connection part is arranged in a circular arc structure.

As an improvement of the connecting structure described in the present invention, the thickness of the second connecting piece is 0.05-1.0 mm.

Description of drawings

Fig. 1 is one of structural representations of the utility model.

Fig. 2 is the second structural diagram of the utility model.

Fig. 3 is a sectional view of the utility model.

detailed description

The utility model will be further described in detail below in conjunction with the specific implementation and the accompanying drawings, but the implementation of the utility model is not limited thereto.

As shown in Figures 1 to 3, a connecting structure includes a first connecting piece 1 and a second connecting piece 2, the first connecting piece 1 is a copper sheet or an aluminum sheet, the second connecting piece 2 is a nickel sheet or a silver sheet, The first connection piece 1 includes a hard connection part 11 and a soft connection part 12 connected with the hard connection part 11, and the second connection piece 2 is thermocompression welded to the hard connection part 11 of the first connection piece 1, and the second connection piece 2 can It is arranged in two pieces, and the two second connecting pieces 2 can be thermocompression-welded to the upper and lower surfaces of the first connecting piece 1 respectively. The upper surface or surface of a connecting piece 1 . The quantity of the hard connection part 11 of the present utility model is one or more, the quantity of the soft connection part 12 is one or more, one or more soft connection parts 12 connect two adjacent hard connection parts 11, hard connection part 12 The connecting part 11 is generally a flat structure, and the flexible connecting part 12 is generally arranged in a circular arc structure. When the utility model is installed in the battery module structure, the flexible connecting part 12 of the circular arc structure can play a role of shock absorption, improving the The service life of the utility model.

Preferably, the first connecting sheet 1 is made of at least two layers of copper or aluminum sheets welded by thermocompression, and the thickness of each layer is 0.05-0.25 mm. Within this range, the softness of the flexible connection part 12 can be effectively guaranteed, so that the product can effectively absorb vibration energy and prevent product damage.

Preferably, the hard connection part 11 has a connection hole 111 through which it is connected to the pole of the battery, usually by welding.

Preferably, the thickness of the second connecting piece 2 is 0.05~1.0mm, within the range of 0.08~0.25mm, the thickness difference between the first connecting piece 1 and the second connecting piece 2 can be ensured to be small, so as to ensure that the soft connection part 12 The square number and the over-current capacity are not reduced. In the range of 0.25~1.0mm, the product can have sufficient strength at the connection part of the nickel sheet, so that the mechanism connection can be effectively realized.

What needs to be said is: Compared with the prior art, the connection structure of the utility model does not need electroplating treatment on the aluminum flexible connection (Bus-Bar), and each PCS product can save more than 3 yuan in electroplating costs, accounting for 15% of the total product price , greatly reducing costs and improving product stability.

The manufacturing process of the above connection structure includes the following steps:

A. Prepare the first connecting piece 1 and the second connecting piece 2. The first connecting piece 1 is a copper or aluminum piece, the second connecting piece 2 is a nickel or silver piece, and the first connecting piece 1 includes a hard connection part 11 And and the soft connection part 12 that is connected with the hard connection part 11;

B. Then heat and press weld the second connecting piece 2 to the hard connection part 11 of the first connecting piece 1, so that the first connecting piece 1 and the second connecting piece 2 are integrated to form the above connection structure.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also change and modify the above embodiment. Therefore, the utility model is not limited to the above specific implementation manners, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the utility model shall belong to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (5)

1. A connecting structure, characterized in that: comprising a first connecting piece and a second connecting piece, the first connecting piece is a copper sheet or an aluminum sheet, the second connecting piece is a nickel sheet or a silver sheet, the The first connection piece includes a hard connection part and a soft connection part connected with the hard connection part, and the second connection piece is thermocompression welded to the hard connection part of the first connection piece. 2 . The connecting structure according to claim 1 , wherein the first connecting piece is made of at least two layers of copper or aluminum sheets welded by thermocompression, and the thickness of each layer is 0.05-0.25 mm. 3. The connection structure according to claim 1, characterized in that: the hard connection part has a connection hole. 4. The connection structure according to claim 1, characterized in that: the soft connection part is arranged in a circular arc structure. 5. The connecting structure according to claim 1, characterized in that: the thickness of the second connecting piece is 0.05-1.0 mm.