Patent ID: 6605388
Filing Date: 2003-08-12
Classification: H01M,Y02E,Y10T

Abstract:
A method of fabricating a battery cell electrode core plate for retaining an active material and collecting current, comprising the steps of:providing a thin metal plate exhibiting electrical conductivity; feeding said metal plate between a primary molding block, having punches which are at least one of conical and pyramidal, and a secondary molding block having concave dies corresponding to said punches; pressing said metal plate between said primary molding block and said secondary molding block, to form hollow projections with thin-walled tips that project from one side and bulges that bulge out in a direction opposite that of said projections in intervals between said projections; and subjecting said metal plate to a process of at least one of chemical etching and electrolytic etching to corrosively remove said thin-walled tips of said hollow projections, and to thereby form through holes and etch pit irregularities on said metal plate.