Provided in the embodiments of the present application are a pressure relief apparatus, a cell, a battery and an electrical device, belonging to the technical field of batteries. Provided in the embodiments of the present application is a pressure relief a...

The pressure compensating device has a gas passage opening (130) and a membrane element (116) with a gas permeable membrane through which the gas passage opening is locked. The gas permeable membrane is deformable depending on a change in the internal pres...