SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME

A method for manufacturing a secondary battery includes an electrode assembly preparation step of preparing an electrode assembly on which flat top and bottom surfaces are formed, a first pressing step of pressing the top and bottom surfaces of the electrode assembly by using a first pressing device, on which a curved surface is formed, to form a curved surface, which has a shape corresponding to that of the curved surface formed on the first pressing device, on each of the top and bottom surfaces of the electrode assembly, an accommodation step of accommodating the electrode assembly in a pouch type exterior in which a cup having a concave shape is formed, and a second pressing step of pressing the curved surfaces of the top and bottom surfaces of the electrode assembly and an outer surface of the pouch type exterior by using a second pressing device.