CASE FOR SECONDARY BATTERY, SECONDARY BATTERY INCLUDING CASE, AND METHOD OF MANUFACTURING SECONDARY BATTERY

A case for a secondary battery may include a bottom part and a sidewall part connected to the bottom part, the bottom part and the sidewall part defining an opening opposite to the bottom part, wherein the sidewall part may include a first cylindrical portion extending from the bottom part and a second cylindrical portion extending from the first cylindrical portion toward the opening, wherein a thickness of the first cylindrical portion and a thickness of the second cylindrical portion may be different, and wherein an elastic member may be disposed on at least a portion of an inner circumferential surface of the second cylindrical portion.