| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a rupture plate, which is conventionally installed in a sealed type battery as one of a safety mechanism for maintaining stably a regular operation of the battery for a long period and which works as a barrier rib superior in sealing property for its characteristics especially in a non-aqueous battery, is made of a metal plate as it works also as current flowing passage, thereby, is apt to be corroded when in contact with moisture, and, therefore, may be possibly corroded by the moisture entered from outside of the battery while the battery is used or stored for a long period, and may not operate regularly as a current cut-off element and a pressure release valve. SOLUTION: A metal rupture plate 331 is provided at a sealing lid 30 to seal the aperture of a bottomed envelope body 20 and a corrosion suppression film 332 to suppress corrosion of metal is laminated on the main surface on the downstream side of a gas release passage of the rupture plate 331. COPYRIGHT: (C)2008,JPO&INPIT |
