Prime Planet Energy & Solutions, Inc.

Minehiro Funato

Hideki Asadachi

Yosuke Shimura

The present disclosure provides a method for manufacturing an angular battery having improved insertability of an electrode body. According to the present disclosure, there is provided a method for manufacturing an angular battery including a battery case that has a rectangular bottom surface and a pair of long side surfaces having, as one side thereof, a long side of the rectangular bottom surface and facing each other, and an electrode body that is accommodated in the battery case and wide surfaces facing the long side surfaces. The manufacturing method includes a preparation step of preparing a first member having substantially U-shaped end faces including the bottom surface and the pair of long side surfaces extending from the bottom surface, and a second member and a third member that are to be joined to respective end faces of the first member and constitute short side surfaces; a sandwiching step of sandwiching the wide surfaces of the battery body between the pair of long side surfaces of the first member; and a joining step of joining the second and third members to the respective end faces of the first member in a state in which the electrode body is sandwiched by the pair of long side surfaces.

Method for manufacturing angular battery, and angular battery

A square battery includes a battery case containing therein an electrode body. The battery case includes a case main body having a square shape substantially in the form of a cuboid having an open side surface and a lid bonded to the case main body so as to close an opening of the case main body. The case main body includes a rectangular bottom surface portion, a pair of wider surface portions facing each other, and a pair of narrower surface portions facing each other. The wider surface portion and the narrower surface portion adjacent to each other are bonded together. In the opening of the case main body, an inner side of a corner portion between the wider surface portion and the narrower surface portion adjacent to each other has an R-shape, and an outer edge of the lid is welded to the inner side of the corner portion.

Growing community of inventors

Toyota, Japan

Minehiro Funato