METHOD OF PRODUCING WELDED STRUCTURE AND METHOD OF PRODUCING BATTERY

摘要

A case body (a first member) (30) and a cap member (a second member) (40) that have not been subjected to welding include a protrusion (25) consisting of at least one of a first protrusion (35) that protrudes from a first outer surface (31) and a second protrusion (45) that protrudes from a second outer surface (41) when the case body and the cap member are assembled together such that the first outer surface (31) is flush with the second outer surface (41). The protrusion (25) is placed between the first outer surface (31) and the second outer surface (4l). In a condition where the first outer surface (31) and second outer surface (41) of the pre-welding case body (30) and cap member (40) are flush with each other, and the protrusion (25) is placed between the first outer surface (31) and the second outer surface (41), the protrusion (25) is irradiated with a laser beam, so that the case body (30) and the cap member (40) are welded together with the protrusion (25) providing a part of a weld (52). Thus, a method of producing a welded structure (l) is provided for producing a welded structure in which the first member (30) and the second member (40) are firmly welded together.