SECONDARY BATTERY HAVING A SUPERIOR MANUFACTURING PROCESS AND STABILITY

摘要

The present invention relates to a secondary battery having a structure in which a jelly-roll constituted by a positive electrode, a separator, and a negative electrode is mounted in a cylindrical battery case, wherein an insulation member has a plate structure and is mounted on an upper end of the jelly-roll. The insulation member has a porous structure in which fine pores communicate with each other in a longitudinal direction or in longitudinal and transverse directions.