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Aluminum/nickel clad material and method for manufacture thereof, and exterior terminal for electric cell

A technology for external terminals and manufacturing methods, which is applied to battery pack parts, battery boxes/coatings, manufacturing tools, etc., can solve problems such as large springback and poor shape, and achieve springback suppression, excellent bending processability, and stable welding zygosity effect

Inactive Publication Date: 2004-12-22
NEOMAX MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the external terminal of the above-mentioned form is formed by using the conventional covering material, there is a problem that large springback is likely to occur during bending processing, and shape defects are likely to occur.

Method used

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  • Aluminum/nickel clad material and method for manufacture thereof, and exterior terminal for electric cell
  • Aluminum/nickel clad material and method for manufacture thereof, and exterior terminal for electric cell
  • Aluminum/nickel clad material and method for manufacture thereof, and exterior terminal for electric cell

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Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Samples of various clad materials were produced in accordance with the following points.

[0036] Prepare a nickel sheet with a width of 60 mm and a thickness of 50 μm of pure nickel (the purity of nickel is above 99.9%) and an aluminum sheet of the same width and thickness of 50 μm of pure aluminum (the purity of aluminum is above 99.9%). After passing through the tunnel-type annealing furnace, the above-mentioned nickel sheet is heated, and then it is taken out from the tunnel-type annealing furnace, and then, within about 2 seconds, it is overlapped with the above-mentioned aluminum sheet, and they are passed through a pair of pressing rollers. For crimping, in Table 1, the heating temperature of the nickel sheet of each sample, and the reduction rate at the time of roller crimping are given.

[0037] Using a test piece having a width of 10 mm and a length of 100 mm obtained from a crimped sheet in which the aluminum layer and the nickel layer were crimped by roll bo...

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PUM

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Abstract

An aluminum / nickel clad material (1) which comprises an aluminum layer (3) formed with pure aluminum and a nickel layer (2) formed with pure nickel being joined with each other by diffusion joining, wherein the nickel layer (2) has a hardness of Hv = 130 to 170; and the aluminum / nickel clad material (1), wherein the aluminum layer (3) and the nickel layer (2) are joined by diffusion joining via an Al - Ni based intermetallic compound layer having a thickness of 0.4 to 10.0 mum, preferably 1.0 to 6.0 mum. The latter clad material exhibits excellent peel strength. The aluminum / nickel clad material exhibits stable welding joinability towards an aluminum material even when ultrasonic welding is applied to it and is less prone to occurrence of failures in shape even when it is subjected to bending working, and thus is suitably used as a material for an exterior terminal for an electric cell.

Description

technical field [0001] The present invention relates to an aluminum / nickel covering material suitable as an external terminal joined to a battery external casing and its material. Background technique [0002] Small electric and electronic devices such as mobile phones and notebook personal computers are equipped with small batteries. This small battery has an outer case made of pure aluminum. Electricity generated by the battery is supplied to various electronic components through external terminals attached to the above-mentioned pure aluminum outer casing and conductive members joined thereto. The above-mentioned conductive member is usually formed of pure nickel excellent in corrosion resistance and durability. [0003] The above-mentioned external terminal has a rectangular shape with a width of 3 mm and a length of 20 mm. For the above-mentioned external terminals, as shown in JP 2001-6746, for example, in consideration of the bondability between the outer casing ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/02B23K35/00H01M50/562
CPCH01M2/30Y02E60/12B23K35/002B32B15/017B23K20/023B23K35/004Y02E60/10H01M50/562B32B15/01B23K20/00
Inventor 盐见和弘石尾雅昭船本健一
Owner NEOMAX MATERIALS
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