| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat type nonaqueous electrolyte battery suppressing deterioration of battery characteristics caused by moisture infiltrating from the outside under humid environments by improving its sealing performance, and having excellent reliability for a long period of time. SOLUTION: In this flat type nonaqueous electrolyte battery, a generating element constituted of a positive electrode and a negative electrode disposed face to face through a separator is housed in a battery case together with a nonaqueous electrolyte, the opening part of the battery case is sealed by a sealing part through a gasket, and a resin material made up by tetra-fluoroethylen-perfluoroalkyl vinyl ether copolymer having crystallinity of 25-45% is used for the gasket. Thereby, air tightness is improved to suppress infiltration of moisture from the outside, and the battery has high reliability without causing deterioration of air tightness due to surface peeling of the gasket 6. COPYRIGHT: (C)2010,JPO&INPIT |
