cylindrical secondary battery with charge and discharge at high speed

A cylindrical secondary battery (100) including a set (400) cap constructed with a structure in which a duct (420) which intercepts electric current and discharge gas pressure when increasing the pressure inside the battery due the abnormal operation of the battery, is in contact with an upper cap (410) having a central portion protruding, wherein the end of the conduit (420) is curved to surround the outer circumferential surface (414) of the upper cap ( 410), and a groove (416) to prevent leakage of an electrolyte and prevent the occurrence of defects in the battery during battery assembly is formed at the interfaces between the conduit (420) and upper cap (410) so that the groove (416) is continuously disposed in parallel with the outer circumferential surface (414) of the upper cap (410).