Patent ID: 7261971

Claim:
A battery which comprises an electrode body made of lamination of a sheet-like positive electrode and a sheet-like negative electrode through a separator, a battery can body comprising a depression provided with a flange portion at a circumference part thereof for accommodating at least a part of said electrode body together with an electrolyte and a metal lid provided with a circumference portion used for sealing an opening of said can body by joining said flange portion and the corresponding circumference portion thereof, wherein one end of each lead element connected to said positive and negative electrode respectively is drawn out from said can body through a space formed at a surface part of said jointed flange section and the area of said flange section wound the drawing space is sealed by a resin bonding, wherein one of the flange portion and the jointed flange section is wider 1 mm or more than the other flange width, and wherein said electrode body is formed in a cross-sectional shape of ellipse in a direction perpendicular to a winding axis of said electrode body by winding laminating of the sheet-like positive electrode and the sheet-like negative electrode through the separator and is accommodated in said can body so that the winding axis of said electrode body is positioned parallel to the broader flange portion or jointed flange section and the winding terminations of said positive electrode and/or said negative electrode are located at the side of the broader flange portion.