Battery cell, battery, and electric device

A battery cell, comprising:

• a housing, wherein the housing defines an accommodating cavity, and an explosion-proof valve is disposed at a bottom of the housing;
• a bottom support, wherein the bottom support is disposed on a bottom wall of the accommodating cavity, and the bottom support comprises:
• a support plate, wherein a side surface of the support plate facing the bottom wall of the accommodating cavity is a first surface;
• and
• a support frame, wherein the support frame comprises at least one first support rib, the first support rib is disposed on the first surface and extends along a length direction of the support plate, at least one of the first support ribs is arranged on at least one side edge of the support plate in a width direction, and a gas flow channel in communication with the explosion-proof valve is defined between the first support rib, the first surface, and the bottom wall of the accommodating cavity;
• and
• an electrode assembly, wherein the electrode assembly is disposed in the accommodating cavity and supported on a second surface of the support plate, and the first surface and the second surface are disposed opposite each other in a thickness direction of the support plate.