Battery and method for producing same

A method for producing a battery, the method comprising:

• a step of preparing a battery can that includes a cylinder portion and a bottom portion, the cylinder portion having an opening edge portion at one of end portions of the cylinder portion, the other one of the end portions of the cylinder portion being closed by the bottom portion;
• a step of preparing a sealing member that includes a lid portion that covers an opening of the opening edge portion;
• and
• a welding step of welding the sealing member to the battery can,
• wherein the battery can includes, in the opening edge portion, a first surface that is inclined obliquely with respect to a radial direction of the cylinder portion formed by the opening edge portion being bent,
• the lid portion includes, in an end portion of the lid portion on an outer circumferential side, a second surface that is inclined obliquely with respect to an axial direction of the cylinder portion, and
• the welding step is a step of placing the sealing member on the battery can in which an electrode body is housed so as to close the opening edge portion, pressing the first surface of the cylinder portion against the second surface of the lid portion such that they overlap each other, and bonding the first surface of the cylinder portion and the second surface of the lid portion to each other by welding.