Sealing insulator for high-capability lithium battery

The utility model relates to a sealing insulator used for a high-capability lithium battery, which belongs to the technical field of battery insulators. The sealing insulator used for the high-capability lithium battery comprises an upper cover and a positive terminal, wherein a hole is formed in the center of the upper cover, the positive terminal consisting of a metal sleeve pipe and a central column arranged in the metal sleeve pipe penetrates the hole on the upper cover and a vitreous body is arranged between the central column and the hole wall of the upper cover. The utility model has the advantages of reasonable structure, low cost, good sealing effect and lower resistance; and the utility model can solve the problem of battery voltage lagging due to the excessively high resistance of the sealing insulator and prolongs the service life of the lithium battery.