Mounting structure of battery bottom ring

The utility model provides a mounting structure of a battery bottom ring, the battery bottom ring comprises an annular bottom ring body, the bottom end of the bottom ring body is provided with a negative electrode cover fixing groove for inserting and fixing a battery negative electrode cover, and the inner circumferential surface of the negative electrode cover fixing groove is uniformly provided with a plurality of bulges in the circumferential direction. Each bulge is formed by extending the bottom ring body inwards in the radial direction, and the bulges are respectively and correspondingly inserted into through holes in the outer peripheral wall of the battery cathode cover. According to the utility model, the bulge is inserted into the through hole in the outer peripheral wall of the battery cathode cover, so that the battery bottom ring is fixedly mounted, the assembly is easy, the fixing effect is good, the requirement on the size of the battery bottom ring is reduced, and the yield is improved. 本实用新型