METHOD AND MEANS FOR ACTIVATING A CLOSED BATTERY

摘要

A method of activating a closed battery containing solid hygroscopic electrolyte is provided which comprises reducing the pressure within the battery to below atmospheric, releasing water vapor within the battery while pressure in the battery is in a reduced state and maintaining the water vapor in the battery until a battery-activating portion of the electrolyte is dissolved and activated. The reduction of pressure in the battery to below atmospheric removes fluid from voids in the electrolyte, thus assuring uniform activation of the electrolyte and optimum performance of the battery. The method has particular application to batteries containing a large number of cells. After the pressure reduction, water can be introduced in the closed battery and water vapor can be generated in situ, with or without the aid of heat. Fluid circulation and cooling means may be provided to stabilize the battery temperature, particularly since dissolving of the electrolyte generates heat.