SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME

A method for manufacturing a secondary battery, having an activation process, in which charging/discharging and aging are performed, according to the present invention comprises: a step of providing a first cell and a second cell, each of which has a structure in which an electrode assembly is embedded in a pouch, and a negative electrode lead and a positive electrode lead protrude to the outside of the pouch; a step of stacking the first cell and the second cell; and a step of bonding the positive electrode leads of the first and second cells to each other and bonding the negative electrode leads of the first and second cells to each other, wherein each of the first and second cells is individually activated before the step of providing the first cell and the second cell.