Sealed prismatic storage battery

摘要

The object of the present invention is to provide a sealed and prismatic storage battery characterized by such features as a high volumetric energy density, high compressivity and the like. A battery case 4 is made of molded plastics, each of an inner surface 9 and an outer surface 10 of each respective corner section 11 is formed of a curvature, the thickness B2 of the corner section 11 is 2.5 mm, a radius of curvature R1 of the outer surface 10 is 5.0 mm, a radius of curvature R2 of the inner surface 9 is 2.5 mm, a thickness B1 of a small thickness section 12 between the corner section 11 and the flat plane section 13 is 2.0 mm and the position of the thinnest wall section coincides with a position where the radius of a circular arc forming the inner surface of the corner section 11 crosses perpendicularly the outer side surface of the battery case.