Sealing structure for a battery

Abstract

A sealing device for a battery, characterized in that the sealing device comprises:a sealing element (1) comprising a connecting portion (11) and a sealing portion (12) axially connected to each other, wherein the connecting portion (11) projects from the sealing portion (12); andan upper cover (2) provided with a first groove (21), wherein the bottom of the first groove (21) is provided with a liquid injection opening (22), wherein an annular flange (24) protrudes from the side wall of the first groove (21), and wherein the sealing part (12) is positively inserted into the liquid injection opening (22), and the annular flange (24) is connected to the connecting part (11), whereby the lower surface of the annular flange (24) fits the upper surface of the connecting part (11), and the upper cover (2) is provided with a second groove (23), wherein the second groove (23) is formed along a circular arc around the first groove (21).