CAP STRUCTURE AND BATTERY

A cap structure and a battery are provided. The cap structure includes a cap assembly and a sealing ring sleeved on the cap assembly. A first sealing portion of the sealing ring includes a first outer wall, a first inner wall, a second outer wall, and a second inner wall. A distance from the first outer wall to a central axis is greater than a distance from the second outer wall to the central axis. A ratio of a distance from the second outer wall to an extension line of the first outer wall to a distance from the second inner wall to an extension line of the first inner wall is 1 : (1-10). The cap assembly is disposed corresponding to the second inner wall.