SECONDARY BATTERY AND METHOD FOR MANUFACTURING SECONDARY BATTERY

A secondary battery according to various embodiments of the present disclosure includes: a battery can including a first curved part formed to be curved to have a first radius of curvature on an inner circumferential surface of a side wall; an electrode assembly accommodated inside the battery can; and a cover cap coupled to the side wall, wherein the cover cap includes a curved coupling part having a shape corresponding to at least a portion of the first curved part.