| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery can, by which a battery post-preservation characteristic can be improved, and a battery using it by increasing a battery can inside volume by means of a DI method and reducing battery contact resistance. SOLUTION: In a battery can 6 using a DI method, a tin-nickel alloy layer 2 with a thickness of 0.05-0.30μm is formed on the outermost surface of the can inner circumference side face, so that micro-cracks are generated on the can inside face. Consequently, surface roughness of the can inside face is increased, a battery internal resistance is reduced, and a battery post-preservation characteristic is improved.
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