Seal, battery module, and electric device

A battery module comprising:

• a housing, wherein the housing is provided with a first through-hole, a second through-hole, and an accommodating space, wherein the first through-hole communicates with the accommodating space, and the second through-hole communicates with the accommodating space;
• a battery cell, wherein the battery cell is disposed in the accommodating space;
• a first seal, wherein the first seal is connected to the housing and seals the first through-hole;
• and
• a second seal, wherein the second seal is connected to the housing and seals the second through-hole;
• wherein the first seal is configured to melt and/or lose adhesion to form a first pressure relief channel when an internal temperature of the battery module reaches a first temperature, and the second seal is configured to melt and/or lose adhesion to form a second pressure relief channel when the internal temperature of the battery module reaches a second temperature, the second temperature being greater than the first temperature.