Electrode plate for cell and method for manufacturing the same

A method for producing a battery electrode plate, comprising:

• intermittently feeding a band-like metal sheet (3) into between an upper die (18) and a lower die (19) that are driven in mutually approaching and retreating directions;
• forming a core member (1) in such a manner that, when the upper die and the lower die are driven to advance to respective positions in proximity to each other, a plurality of slits (24) are formed in the metal sheet at locations where respective blades (22) of the upper die and the lower die interengage with each other, and at the same time strip-like portions formed between each adjacent slits are pushed up by a plurality of bumps (21) on the lower die to form first bowed portions (4) and pushed down by a plurality of bumps (21) on the upper die to form second bowed portions (7) in an alternate arrangement, the alternately arranged first and second bowed portions forming a plurality of protruding rows (8), and flat parts (9) are formed between each two protruding rows at locations where respective non-processing parts of the upper die and the lower die interengage with each other;
• and
• densely coating the core member with a mixture paste chiefly comprising an active material (2).

A method for producing a battery electrode plate, comprising:

• continuously feeding a band-like metal sheet (3) into between a pair of processing rolls (27, 28) that are driven to rotate in synchronization with each other;
• forming a core member (1) in such a manner that a plurality of slits (24) are formed in the metal sheet at locations where respective blades (32) of disk cutters (31) of both the processing rolls interengage with each other, and at the same time strip-like portions formed between each adjacent slits are pushed in opposite directions in an alternate arrangement by respective bumps (29) on both the processing rolls to form first and second bowed portions (4, 7), respectively, the alternately arranged first and second bowed portions forming a plurality of protruding rows (8), and flat parts (9) are formed between each two protruding rows at locations where respective non-processing parts of both the processing rolls interengage with each other;
• and
• densely coating the core member with a mixture paste chiefly comprising an active material (2).

A method for producing a battery electrode plate, comprising:

• rotating a metallic electrolytic deposition drum (37) in one direction in an electrolyzer (34) as being immersed in electrolyte (33) therein, so that metal contained in the electrolyte is electrolyzed and continuously deposited on the circumferential surface of the electrolytic deposition drum, in which the electrolytic deposition drum has a plurality of rows of bumps and dents (41) on its circumferential surface arranged along its circumferential direction with flat parts (42) interposed between each two rows, each of the rows comprising a plurality of curved bumps (39) and curved dents (40) alternately arranged along the axial direction of the electrolytic deposition drum;
• peeling the metal deposited on the electrolytic deposition drum in the form of a foil (38) to obtain a core member (1);
• and
• densely coating the core member with a mixture paste chiefly comprising an active material (2).