Patent ID: 9017862
Filing Date: 2015-04-28
Classification: B32B,C22C,C25D,H01M,Y02E

Abstract:
1. A surface-treated steel sheet for battery cases, comprising a nickel-cobalt alloy layer formed at the outermost surface of a plane to be an inner surface of a battery case, wherein when X-ray diffraction measurement using CuKα as a radiation source is performed for the nickel-cobalt alloy layer, an intensity ratio I A /I B is within a range of 0.01 to 0.9, the intensity ratio I A /I B is a ratio of an intensity I A of a peak present at a diffraction angle 2θ within a range of 41° or more and less than 43° to an intensity I B of a peak present at a diffraction angle 2θ within a range of 43° or more and 45° or less.