Prismatic secondary battery

Abstract

Provided is a prismatic secondary battery with improved productivity and mounting density. A prismatic secondary battery 100 of the present invention includes a battery can 1 that contains an electric storage element 3 and has a pair of wide surfaces 1b, a pair of narrow surfaces 1c, a bottom surface 1d, and an opening 1a, a lid 6 having a positive electrode-side through hole 46 and a negative electrode-side through hole 26 and closing the opening portion 1a of the battery can 1, and flat plate-like positive electrode current collector plate 44 and negative electrode current collector plate 24 inserted in the positive electrode-side through hole 46 and the negative electrode-side through hole 26 and extending in a straight line toward the bottom surface 1d. Then, the positive electrode current collector plate 44 and the negative electrode current collector plate 24 are made of different metal materials from each other as main materials, and an insertion position of the positive electrode current collector plate 44 deviates on a side of one of the wide surfaces 1b with respect to an insertion position of the negative electrode current collector plate 24.

Dependencies are inferred from the claim text.