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Conductive connecting piece for battery and preparation method of conductive connecting piece

A technology of conductive connecting sheet and battery, applied in conductive connection, battery electrode, contact manufacturing and other directions, can solve the problems of unfavorable welding stability, increase production cost and equipment cost, etc., achieve low cost, high production efficiency, easy welding Effect

Active Publication Date: 2015-05-20
YULIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter what the structure is, it has been proved that the conductivity of the above-mentioned metal sheet is not enough to meet the welding requirements of high-power power battery combinations, because if the internal resistance is too low (resistivity is less than 3.0μΩ·cm), the material must be welded to The steel shell must be slit on the metal sheet and also need to be bumped. In addition, an expensive special high-power energy storage welding machine is required, otherwise it cannot be welded, and this will significantly increase the production cost and equipment cost and is not conducive to welding stability

Method used

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  • Conductive connecting piece for battery and preparation method of conductive connecting piece
  • Conductive connecting piece for battery and preparation method of conductive connecting piece
  • Conductive connecting piece for battery and preparation method of conductive connecting piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 It schematically shows the structure of the conductive connecting sheet for the battery in Example 1. The conductive connecting sheet for the battery is a conductive connecting sheet that can connect 4*4 18650 batteries, and the overall thickness is 0.3 mm. figure 2 The cross-sectional structure of the conductive connecting sheet is schematically shown in . In the figure, 1 is the copper layer, 2 is the first corrosion-resistant and easy-to-solder metal layer, 3 is the recess, 4 is the cross-shaped welding seam, 5 is the resistance spot welding area, 6 is the non-resistance spot welding area, and 7 is the tab hole on the top.

[0033] see figure 1 and figure 2 , The conductive connecting sheet is a conductive connecting sheet made of a layered composite metal, and the layered composite metal includes a copper layer 1 and a first corrosion-resistant and easy-soldering metal layer 2 compounded on the first surface of the copper layer 1 . The area on the condu...

Embodiment 2

[0044] The conductive connecting sheet for the battery is a conductive connecting sheet that can connect 4*4 18650 batteries, and the overall thickness is 0.5mm.

[0045] Its shape is the same as that of the conductive connecting piece in Example 1, but its material (namely, the composition and structure of the layered composite metal constituting the conductive connecting piece) is different.

[0046] In Embodiment 2, the layered composite metal constituting the conductive connecting piece includes a copper layer and a first corrosion-resistant and easily-soldering metal layer compounded on the first surface of the copper layer, and the first corrosion-resistant and easily-soldering metal layer is a nickel layer.

[0047] The specific process of preparing the conductive connecting sheet is basically similar to that of Example 1, including the following steps:

[0048] S1. Prepare a copper-based layered composite metal strip. The 0.8mm (thickness)*110mm (width) N6 pure nickel...

Embodiment 3

[0054] The battery conductive connecting sheet is a conductive connecting sheet that can connect 4*4 18650 batteries, and the overall thickness is about 0.5mm. Its shape is the same as that of the conductive connecting piece in Example 2, but the material (ie, the composition and structure of the layered composite metal constituting the conductive connecting piece) is different.

[0055] In Example 3, the layered composite metal constituting the conductive connecting sheet not only includes a copper layer and a first corrosion-resistant and easy-soldering metal layer compounded on the first surface of the copper layer, but also a second corrosion-resistant metal layer compounded on the second surface of the copper layer. etch the solderable metal layer. The first corrosion-resistant and solderable metal layer and the second corrosion-resistant and solderable metal layer are nickel layers.

[0056] One of its preparation methods is basically the same as the method in Example 2...

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Abstract

The invention relates to a conductive connecting piece for a battery and a preparation method of the conductive connecting piece. The conductive connecting piece is made of a laminated composite metal material; a concave part is formed in the back side of a resistance spot welding area in the conductive connecting piece; the laminated composite metal material comprises a copper layer and a first corrosion-resisting easily welded metal layer which is compounded on a first side of the copper layer; the front side of the resistance spot welding area is positioned on the first corrosion-resisting easily welded metal layer. The preparation method comprises the following steps: S1, preparing a copper-based laminated composite metal strip material; S2, selectively etching the copper-based laminated composite metal strip material so as to form the concave part; and S3, performing stamping molding on the etched copper-based laminated composite metal strip material, thereby preparing the conductive connecting piece. The conductive connecting piece is easy to weld, good in conductivity, high in production efficiency and low in cost, and also can meet high magnification and large-capacity application places such as a power battery.

Description

technical field [0001] The invention relates to a conductive connecting sheet in the battery field, more specifically, to a conductive connecting sheet for a battery and a preparation method thereof. and other high-capacity applications. Background technique [0002] The high attention and emphasis on new energy in today's society has brought unprecedented development opportunities for the application of batteries, especially secondary batteries, among which the application and development of high-rate and power batteries have received special attention and attention. Many products represented by electric vehicles and electric tools all use combined battery packs composed of multiple batteries connected in series and parallel, and the connecting pieces between the batteries are mostly sheet metal at present. Taking the current cylindrical battery pack for electric vehicles as an example, generally hundreds of 18650 single cells are connected in parallel through large-area c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M2/20H01R43/16H01M50/503H01M50/522H01M50/526
CPCH01R43/16H01M50/50Y02E60/10
Inventor 徐卓辉孙康林
Owner YULIN NORMAL UNIVERSITY
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