Cap structure and battery

A cap structure, comprising:

• a cap assembly;
• and
• a sealing ring sleeved on the cap assembly, wherein the sealing ring comprises a first sealing portion, and at least part of the cap assembly is disposed within a cavity formed by the first sealing portion;
• wherein a portion of the first sealing portion is configured to be bent along a second direction;
• the first sealing portion comprises a first inner wall and a first outer wall;
• the first outer wall comprises a portion extending along the second direction and another portion extending along a first direction;
• the first inner wall extends along the second direction;
• the portion of the first outer wall extending along the second direction is disposed opposite to the first inner wall;
• the first direction and the second direction are perpendicular to each other;
• the first sealing portion further comprises a second outer wall and a second inner wall extending along the first direction;
• wherein the second outer wall and the another portion of the first outer wall extending along the first direction are located on a same side, and the second inner wall and the first inner wall are disposed perpendicular to each other;
• a vertical distance from the second outer wall to an extension line of the another portion of the first outer wall along the second direction is defined as a first distance, a vertical distance from the second inner wall to an extension line of the first inner wall along the second direction is defined as a second distance, a ratio of the first distance to the second distance is 1 :
• (1-10);
• wherein the cap assembly is at least partially disposed corresponding to the second inner wall along the second direction.

A cap structure, comprising:

• a cap assembly;
• and
• a sealing ring comprising a first sub-portion and a second sub-portion, wherein the first sub-portion comprises a first outer wall disposed along a second direction and a first inner wall disposed opposite to the first outer wall, the second sub-portion comprises a second outer wall disposed along the first direction and a second inner wall disposed opposite to the second outer wall;
• the first sub-portion extends along the second direction and is configured to be bent relative to the second sub-portion;
• the first sub-portion is connected to the cap assembly along the second direction, and a portion of the second sub-portion extends along the first direction and is connected to the cap assembly along the second direction;
• wherein a vertical distance between the first inner wall and the first outer wall along the first direction is smaller than a vertical distance between the second inner wall and the second outer wall along the second direction.