Cap assembly for cylindrical secondary battery comprising current interrupt device coated with insulating material on outer circumference surface

摘要: Disclosed herein is a cap assembly loaded on an open upper end of metal battery can cylindrical secondary battery. The includes top located at the uppermost to constitute positive electrode terminal having outward protruding structure, safety vent under and electrically connected via for discharging gas, current interrupt device configured such that portion surface lower lead assembly, being rupture when high pressure generated in battery, whereby separated from flow current, (CID) gasket coupled so as wrap outer circumferential part excluding portions are tabs order secure electrical insulation property device, wherein insulative coating layer made material formed device.