| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control valve type lead-acid battery having improved life characteristics by making the working pressure of a valve constant without being affected by fine structural change, e.g. contact state of an exhaust port and the rubber plate of a control valve or adhesion amount of silicon oil. <P>SOLUTION: An electrode plate group and an electrolytic solution are housed, respectively, in a plurality of cell chambers provided in a battery container and the plurality of cell chambers are connected in series. Upper part of the battery container is covered with a lid having exhaust ports at positions directly above respective cell chambers. Each exhaust port is sealed by a control valve consisting of a rubber plate, a cushion material mounted on the rubber plate, and a retainer plate which presses and fixes the cushion material. In such a control valve type lead-acid battery, the cushion material is pressed and fixed by a retainer plate where the thickness at a portion corresponding a part of the periphery of the exhaust port is reduced when compared with that at other positions. <P>COPYRIGHT: (C)2012,JPO&INPIT |
