CYLINDRICAL SECONDARY BATTERY CONTAINING CENTER PIN OF NOVEL STRUCTURE

摘要

The present invention provides a secondary battery, wherein an electrode assembly (jelly-roll) manufactured by winding an anode, a cathode, and a separation layer which is interposed between the anode and the cathode is embedded in a cylindrical battery case. A cap assembly is mounted on the upper side of the battery case. A center pin which is longer than the jelly-roll in the longitudinal section of the battery is inserted into a core of the jelly-roll.