SECONDARY BATTERY

A secondary battery includes an electrode assembly having positive electrodes, of which positive electrode tabs are connected to each other, and negative electrodes, of which negative electrode tabs are connected to each other, the electrode assembly having a quadrangular shape, a space part that is an empty space is defined between two sides facing each other, and the positive electrode tabs and the negative electrode tabs are positioned within the space part, a positive electrode lead having one end connected to the positive electrode tabs, a negative electrode lead having one end connected to the negative electrode tabs, and a pouch in which the electrode assembly is embedded is provided. The other end of the positive electrode lead and the other end of the negative electrode lead pass through the pouch to protrude from one of the largest surfaces of the pouch to the outside.