| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat battery which is advantageous in securing liquid leakage resistance. SOLUTION: An opening of an outer package can 2 of the flat battery 1 is sealed with a sealing can 3. A peripheral wall 12 of the outer package can 2 includes a bent part 13 formed by curving a tip end part 12a to a center axis side 9 of the flat battery 1. The outer package can 2 is caulked and fixed on the sealing can 3 by the bent part 13. A peripheral wall 15 of the sealing can 3 includes a folded part 17 so that a part of the peripheral wall 15 of the sealing can 3 becomes a double wall 18. A gasket 4 is interposed between an outer circumferential surface of the peripheral wall 15 of the sealing can 3 and an inner circumferential surface of the peripheral wall 12 of the outer package can 2. A tip end 17a of the folded part 17 presses the gasket 4. With this pressing, a recess is formed on the gasket 4 at the tip end 17a of the folded part 17, and compressibility of the gasket at the recess part is highest. COPYRIGHT: (C)2011,JPO&INPIT |
