| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed battery that inhibits the increase or fluctuation of the internal resistance against the aged deterioration, temperature variation, or the like. SOLUTION: A battery can 2 is sealed by a cover structure 4. Arranged between the electricity generation element 3 and battery cap 17 is a safety valve member 18 to cut off the electrical connection by distortion when the internal pressure is abnormally increased. The battery cap 17 has an outer flange 17a attached to the battery can 2 with a gasket 15 interposed between them. The safety valve member 18 has an outer flange 18b corresponding to the flange 17a of the battery cap 17. The flanges 17a and 18a are soldered facing each other integrated into the battery cap 17.
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