Electric storage battery with a gas-venting system incorporated in the cover

摘要

An electric storage battery comprising a plurality of cells, each cell having a respective gas vent path including a primary condensation chamber (17) and a secondary trap chamber (18) through which gas must flow to reach a vent outlet (29) of the battery, each trap chamber (18) being positioned downstream of its respective primary condensation chamber (17) so that gas venting from a cell must pass through the primary chamber (17) to reach the trap chamber (18). Each trap chamber (18) is associated with its respective condensation chamber (17) such that electrolyte collecting in the trap chamber (18) can drain only into each respective condensation chamber (17) for return to each respective cell, the trap chambers (18) being defined within a common gallery by upstanding walls (27) dividing the gallery into a plurality of trap chambers (18) communicating with each other and the battery vent outlet (29) through vent apertures above the dividing walls (27).