SECONDARY BATTERY HAVING IMPROVED MANUFACTURING PROCESS EFFICIENCY AND SAFETY

Disclosed is a secondary battery having a structure in which a jelly-roll having a cathode/separator/anode structure is mounted in a cylindrical battery case, wherein a plate-shaped insulating member is mounted on the top of the jelly-roll and the insulating member includes a perforated inlet enabling gas discharge and penetration of electrode terminals and a plurality of pores with a diameter of 100 µm or less provided over the entire surface of the insulating member.