| 摘要 |
A safety rubber valve for a battery is provided to ensure a continuous sealability even upon a long term use and therefore to maintain an efficiency and performances of the battery for a long time. The safety rubber valve for a battery has a shape of a cylinder, of which a topside(11) is clogged and in which an angle(13) between the topside(11) and the inside of a side wall(12) is 90 degrees or less. The side wall(12) is formed so that a lower contact surface(15) of the inside is 90 degrees with the topside(11). Preferably, an internal edge(14) of a lower end of the side wall(12) is round. |
