Battery cell electrode core plate, fabrication method therefor, and battery cell made therewith

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 through primary punches, which are at least one of conical and pyramidal, and concave primary dies arranged alternately in a primary molding block, and concave secondary dies corresponding to said primary punches and one of conical and pyramidal secondary punches corresponding to said concave primary dies arranged in a secondary molding block;
• pressing said metal plate between said primary molding block and said secondary molding block, to form hollow projections with thin-walled tips that alternately project from both sides and bulges that bulge out in a direction opposite that of said hollow projections in intervals between said projections;
• and
• subjecting said metal plate to a process of at least one of chemical etching or electrolytic etching to corrosively remove said thin-walled tips of said projections, and to thereby form through holes and etch pit irregularities on said metal plate.

A method of manufacturing a battery cell electrode core plate comprising the steps of:

• press molding a metal sheet so as to form hollow projections in said metal sheet;
• and
• applying a corrosive material to said metal sheet so as to remove material such that said hollow projections are opened to form projected holes and to remove rough edges and burrs;
• wherein said press molding includes pressing the metal sheet between a first molding block and a second molding block and said first molding block has one of conical punches and pyramidal punches for forming said hollow projections in said metal sheet;
• and
• wherein said second molding block has concave dies and forms bulges in said metal sheet.

A method of manufacturing a battery cell electrode core plate comprising the steps of:

• press molding a metal sheet so as to form hollow projections in said metal sheet;
• and
• applying a corrosive material to said metal sheet so as to remove material such that said hollow projection are opened to form projected holes and to remove rough edges and burrs;
• wherein:
• said press molding includes pressing the metal sheet between a first molding block and a second molding block;
• said first molding block has conical or pyramidal punches and forms hollow projections, in a first direction, in said metal sheet;
• and
• said second molding block has concave dies and forms a plurality of bulges, in a second direction, in said metal sheet.

A method of manufacturing a battery cell electrode core plate comprising the steps of:

• press molding a metal sheet so as to form hollow projections in said metal sheet;
• and
• applying a corrosive material to said metal sheet so as to remove material such that said hollow projections are opened to form projected holes and to remove rough edges and burrs;
• wherein:
• said press molding includes pressing the metal sheet between a first molding block and a second molding block;
• said first molding block has conical or pyramidal punches and concave dies and forms hollow projections and bulges, in a first direction, in said metal sheet;
• and
• said second molding block has conical or pyramidal punches and concave dies and forms hollow projections and bulges, in a second direction, in said metal sheet.

A method of manufacturing a battery cell electrode core plate comprising the steps of:

• press molding a metal sheet so as to form hollow projections in said metal sheet;
• partially flattening said metal sheet after said hollow projections are formed;
• and
• applying a corrosive material to said metal sheet so as to remove material such that said hollow projections are opened to form projected holes and to remove rough edges and burrs.