Abstract: In the present invention, the electrode assembly is first formed, and then a tab portion is formed by compressing an active material unfilled portion in an electrode having a foamed-metal electrode substrate (Tab Portion Formation Step). Accordingly, in the manufacturing method of the present invention, even if winding misalignment is created in which the edge of the separator is located adjacent to one edge of the active material unfilled portion during the formation of the electrode assembly, the misaligned portion of the separator is pushed in the width direction of the electrode together with the active material unfilled portion when the compression is applied in the Tab Portion Formation Step. Herewith, it is less likely to tuck a part of the separator between the tab portion and the current collector when the current collector is joined in the Current Collector Joining Step.

Abstract: A method for producing a cadmium negative electrode for alkaline batteries according to the present invention comprises a step of obtaining a cadmium active-substance impregnated electrode plate by impregnating said electrode substrate with a cadmium active substance; and a step of adding polyethylene glycol for forming a polyethylene glycol coating on the surface of said cadmium negative electrode or on the surface of said active substance by coating or impregnating said active-substance impregnated electrode with polyethylene glycol.

Abstract: In the present invention, the electrode assembly is first formed, and then a tab portion is formed by compressing an active material unfilled portion in an electrode having a foamed-metal electrode substrate (Tab Portion Formation Step). Accordingly, in the manufacturing method of the present invention, even if winding misalignment is created in which the edge of the separator is located adjacent to one edge of the active material unfilled portion during the formation of the electrode assembly, the misaligned portion of the separator is pushed in the width direction of the electrode together with the active material unfilled portion when the compression is applied in the Tab Portion Formation Step. Herewith, it is less likely to tuck a part of the separator between the tab portion and the current collector when the current collector is joined in the Current Collector Joining Step.

Abstract: To provide a battery with low internal resistance and high efficiency in which connection points to a collector plate are evenly distributed on the electrode plate and the number of the connection points is increasable, a battery according to the present invention includes a positive and negative collector plates respectively connected to end surfaces of an electrode assembly. The collector plate, connected to a positive electrode plate, includes a connection area connecting to an edge of the positive electrode plate, and a lead area extended from an outer edge of the connection area. Flange structures, by which the positive and negative electrode plates are connected, are included in the connection area. The flange structures include a ring-shaped flange structure, a linear flange structure, and semi-ring shaped flange structure and semi ring-shaped inner flange structure respectively formed on outer and inner edges of the connection area.

Abstract: A method for producing a cadmium negative electrode for alkaline batteries according to the present invention comprises a step of obtaining a cadmium active-substance impregnated electrode plate by impregnating said electrode substrate with a cadmium active substance; and a step of adding polyethylene glycol for forming a polyethylene glycol coating on the surface of said cadmium negative electrode or on the surface of said active substance by coating or impregnating said active-substance impregnated electrode with polyethylene glycol.