Battery and battery manufacturing method

A battery manufacturing method comprising:

• preparing a terminal;
• preparing a flat electrode body;
• preparing a case main body which has a flat rectangular-solid-shaped accommodation space and of which one surface is opened;
• preparing a sealing plate to be attached to an opening of the case main body;
• attaching the terminal to the sealing plate;
• joining the terminal to the electrode body;
• and
• placing, in the case main body, the electrode body out of an assembly including the sealing plate, the terminal, and the electrode body, and mounting the sealing plate to the opening of the case main body, wherein:
• the terminal thus prepared includes a base end to be attached to the sealing plate, an intermediate part extending from the base end, and a flat tip end bent from a tip of the intermediate part, and the tip end is inclined relative to a normal line of an inner surface of the sealing plate such that, at the time when the terminal is attached to the sealing plate, a normal line of either one surface of the tip end intersects with a flat surface along the inner surface of the sealing plate;
• in the joining of the terminal to the electrode body, the electrode body is joined to the one surface of the tip end of the terminal;
• and
• in the placing of the electrode body in the case main body and the mounting of the sealing plate to the opening of the case main body, the terminal is deformed at a boundary between the intermediate part and the tip end, as a base point.