CAP FOR FULL-TAB CYLINDRICAL LITHIUM BATTERY AND FULL-TAB CYLINDRICAL LITHIUM BATTERY

This application is applicable to the technical field of lithium batteries, and provides a full-tab cylindrical lithium battery cap and a full-tab cylindrical lithium battery, including an explosion-proof valve, an isolation ring, a connecting plate and a sealing ring, and the isolation ring is arranged between the explosion-proof valve and the connecting plate, the sealing ring is sleeved on an edge of the explosion-proof valve; the explosion-proof valve includes a connecting portion and an explosion-proof portion, the connecting portion is arranged along a circumference of the explosion-proof portion, and the edge of the connecting portion abuts on the sealing ring, the explosion-proof portion is provided with a rupture line, and the connecting portion is thicker than the explosion-proof portion. The full-tab cylindrical lithium battery cap provided in this application is formed by combining an explosion-proof valve, an isolation ring, a connecting plate and a sealing ring.