BIDIRECTIONAL VENTILATION VALVE, BATTERY AND POWER DEVICE

Embodiments of this application relate to the technical field of power batteries, and disclose a two-way vent valve, a battery, and an electrical device. The two-way vent valve includes: a valve seat, where the valve seat is configured to form a gas duct, and the gas duct includes a first end and a second end; a two-way valve assembly, where the two-way valve assembly is movably disposed in the gas duct, and is configured to open or close the gas duct through movement relative to the gas duct; and a first elastic component, configured to exert a force on the two-way valve assembly to close the air duct, and, when an air pressure difference between the first end and the second end of the gas duct is greater than a first threshold, the two-way valve assembly is configured to overcome the force of the first elastic component to open the gas duct. In this way, the two-way vent valve according to the embodiments of this application implements two-way controllable exchange of gas between the two ends of the valve. When being used in a battery or a device that uses the battery, the two-way vent valve can reduce the impact caused by moisture outside the battery and reduce risks of condensation.