Patent ID: 8241786
Filing Date: 2012-08-14
Classification: H01M,Y02E

Abstract:
1. A secondary battery comprising: a sealing plate fitted with a terminal; an electrode assembly; and an outer can housing the electrode assembly and having a mouth portion to which the sealing plate is hermetically fixed, the terminal and a collector of the electrode assembly being electrically coupled with each other, the terminal having a terminal portion formed on one side of a flange portion, and a cylindrical crimping member formed on the other side of the flange portion, the cylindrical crimping member being inserted through openings formed in a first insulating member, the sealing plate, a second insulating member, and the collector, a tip end side of the cylindrical crimping member being crimped in a diameter-increasing direction in a countersunk hole formed in the collector, a thin-walled portion having a thickness smaller than those of other portions formed at an end portion of the crimping member being fitted in the countersunk hole of the collector, the flange portion of the terminal, the first insulating member, the sealing plate, the second insulating member, and the collector being mechanically fixed to each other, and a joint section of the thin-walled portion of the crimping member and the countersunk hole of the collector being welded with a high-energy beam.