Embossed type separator for a storage battery

摘要

The separator comprises an embossed, thin porous sheet of synthetic material and inorganic powder. The embossed pattern consists of a large number, e.g. 200 to 1300 per cm2, of spherical projections of equal height arranged in vertical and horizontal rows at regular intervals and forming spherical cavities on the opposite side. The projections on one side are shifted from those on the opposite side so that there are alternating rows of projections and cavities on each side. Gas discharging passages are formed by the lines of communicating cavities and valleys between adjacent projections.