SECONDARY BATTERY AND ASSEMBLED BATTERY, AND PRODUCTION METHOD THEREOF

Provided is art that allows joining an external conductive member and a bus bar more stably. A method for producing a secondary battery disclosed herein has: an attachment step; an arrangement step; a covering step; and, a joining step. The external conductive member has a recess sunk from the upper surface, around a through-hole. In the joining step, the external conductive member and the terminal are joined in a state where an edge portion of a cover member is disposed between a planned joint portion, and an outer peripheral edge of the recess, in a cross-sectional view along a direction of penetration into the through-hole.