ONE SIDE Ni PLATED STEEL SHEET HAVING HIGH LUSTER AND REDUCED CONTACT RESISTANCE FOR NEGATIVE AND POSITIVE POLE CANS OF LITHIUM BUTTON CELL

摘要

PROBLEM TO BE SOLVED: To provide a negative pole can and a positive pole can of lithium button cell having high glossiness and low contact resistance. SOLUTION: In this lithium button cell can, an austenitic stainless steel excellent in workability is used as a base material for the negative pole can 2, and a relatively inexpensive ferritic stainless steel is used as a base material for the positive pole can 1. The surface roughness of each stainless steel is regulated to <=0.05μm Ra, and a mat Ni plating layer of 0.01-0.3μm layer thickness is formed via a bright Ni plating layer on each stainless steel.