SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME

A secondary battery includes an electrode assembly including a first electrode, a second electrode, and a separator, an inner case including an upper opening of which a first surface is open, a lower opening of which a second surface facing the first surface is open, and a tubular inner sidewall surrounding the electrode assembly, an upper terminal plate joined to the upper opening and electrically coupled to the first electrode, a lower terminal plate joined to the lower opening and electrically coupled to the second electrode, and an outer case including a tubular outer sidewall surrounding the inner case, an upper part extending inwardly from the outer sidewall and joined to the upper terminal plate, and a lower part extending inwardly from the outer sidewall and joined to the lower terminal plate, wherein the inner case and the outer case include an insulating material.