BATTERY AND METHOD OF MANUFACTURING SAME

A battery includes an electrode assembly including a first electrode, a second electrode, and a separator wound between the first electrode and the second electrode, a cylindrical case including a bottom part, a sidewall connected to the bottom part, and an opening facing the bottom part and accommodating the electrode assembly, and a first cap assembly coupled to one end of the sidewall of the case to seal the opening, wherein the first cap assembly includes a cap plate, and each of the cap plate and the case includes an insulating material.