| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed storage battery capable of efficiently releasing a gas inside a battery from the battery to the outside even at the temperature rise due to overcharging or over discharging. SOLUTION: A safety valve device of this sealed storage battery is constructed of a sealed plate 6 having a through hole 5 communicating with a battery interior, a terminal cap 7 and a rubber valve element 8 stored in a space formed by the sealed plate 6 and the terminal cap 7 and pressed against the through hole 5 of the sealed plate 6. The rubber valve element 8 having a recessed part 9 is utilized on a part facing to a plurality of ventholes 10 formed in the peripheral side surface of the central projection part of the terminal cap 7. |
