MANUFACTURING METHOD FOR SECONDARY BATTERY

The method of manufacturing a secondary battery according to the present disclosure comprises the steps of: forming a stack cell by stacking a negative electrode material layer, a current collector, a positive electrode material layer, and a separator in a first direction and sealing the side surfaces thereof with a sealing layer; pressing the stack cell in the first direction; and providing heat to the stack cell in a second direction perpendicular to the first direction to form the sealing layer, wherein the sealing layer comprises a sealing resin.