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Title:
COPPER ALLOY BAR USED FOR BATTERY TAB MATERIAL FOR CHARGING
Document Type and Number:
WIPO Patent Application WO/2012/128150
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a copper alloy bar suitable for a battery connection tab material, which has a good balance among good tensile strength, electrical conductivity, repeated bendability and weldability. The present invention relates to an Sn-plated copper alloy bar for a battery tab for charging, which contains 2-12% by mass of Zn and 0.1-1.5% by mass of Sn with the balance made up of copper and unavoidable impurities. The Sn-plated copper alloy bar for a battery tab for charging has an aspect ratio of crystal grains in the thickness direction and in a direction parallel to the rolling direction of 0.1 or more, and is provided with a reflow Sn plating wherein the thickness of the Sn layer after reflow is 0.10-1.60 μm and the thickness of the Cu-Sn compound after reflow is 0.10-1.90 μm. This copper alloy bar is preferably provided with an Ni/Cu base plating or a Cu base plating, and has an electrical conductivity of 31-70% IACS, a number of bending repetitions of 2.5 or more in a 180° bending and bend-back test, and a tensile strength of 300-610 MPa.

Inventors:
KAKITANI AKIHIRO (JP)
Application Number:
PCT/JP2012/056566
Publication Date:
September 27, 2012
Filing Date:
March 14, 2012
Export Citation:
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Assignee:
JX NIPPON MINING & METALS CORP (JP)
KAKITANI AKIHIRO (JP)
International Classes:
C22C9/04; C22F1/08; C25D5/10; C25D5/50; C25D7/00; H01M2/06; H01M2/26; H01M2/30; C22F1/00
Domestic Patent References:
WO2008114868A12008-09-25
Foreign References:
JP2010236068A2010-10-21
JP2007084920A2007-04-05
JP2010242121A2010-10-28
Attorney, Agent or Firm:
AXIS Patent International (JP)
Axis international patent business corporation (JP)
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Claims: