| 摘要 |
PROBLEM TO BE SOLVED: To make a lead wire hard to be dropped off from an electrode made of aluminum of an electrochemical cell. SOLUTION: The lead wire 18, made of copper, is jointed to a tab part 14 of a collector 30 made of aluminum and projected from a cell body 12 of a lithium ion polymer secondary battery 10. A wire, in which a tin cover film is formed on a surface, is preferably the lead wire 18 made of copper. A heating press-contacting method is preferable as the jointing method. |
