Method for making multi-porous lead-carbon electrode sheets electrode sheet cassette and lead-carbon battery

A method for making a multi-porous lead-carbon composite electrode comprising steps of:

• providing a first lead material, a second lead material and a carbon material, coupling a first side of the first lead material to one side the carbon material, and coupling a second side of the second lead material to the other side of the carbon material, so that the carbon material is located between the first lead material and the second lead material to form a lead-carbon sandwich, wherein the first lead material is in a sheet form, and the second lead material is in a sheet form;
• placing the lead-carbon sandwich in a hot press mold, wherein the hot press mold comprises:
• a convex mold, the convex mold comprising a plurality of convex mold exhaust holes and a convex mold ventilating groove, the convex mold exhaust holes dispersed evenly along an inner side of convex periphery of the convex mold, the convex mold ventilating groove formed along an outer side of convex periphery of the convex mold;
• and
• a concave mold, the concave mold comprising a plurality of concave mold exhaust holes and a concave mold ventilating groove, the concave mold exhaust holes dispersed evenly along an inner side of concave periphery of the concave mold corresponding to the convex mold exhaust holes, the concave mold ventilating groove spiraling along the inner side of periphery of the concave mold and towards geometric center of the concave mold;
• wherein the convex mold ventilating groove connects to the concave mold ventilating groove for ventilation when the convex mold combines with the concave mold in a corresponsive manner;
• at a first temperature, producing a swelling pressure from air between the carbon material and the first lead material or the second lead material to ventilate the air;
• and
• at the first temperature, exerting an external pressure on the lead-carbon sandwich for 2˜10 minutes so as to combine the first lead material, the second lead material and the carbon material to form a lead-carbon electrode sheet, wherein the first temperature ranges from 300 to 360° C. and the external pressure ranges from 70 kg/m2 to 120 kg/m2.