A gas cylinder valve assembly includes a valve body and a valve rod, an end of the valve body is configured to connect with a gas cylinder, a first end face of the valve body facing the gas cylinder is configured with a fluid channel, a second end face of the valve body departing from the gas cylinder is defined with a cavity, a first stepped surface is provided at a connection between the cavity and the fluid channel, the valve rod is connected with an elastic element, an elastic force of the elastic element drives an end face of the valve rod to abut against the first stepped surface to form a sealing trend; a circumferential outer wall of the valve rod in the cavity is defined with a cutting slot, and a breaking zone is formed at a position corresponding to the cutting slot.

This device comprises: a pneumatic cylinder (34), a gas generator (36), a chamber (6, 8) for atmospheric venting, with: an inlet with a connection to the gas generator (36), a first outlet, a second outlet, a valve (16) having a first side (24) and a second side (26) which can change position under the effect of a gas generated by the gas generator and comprising a passage (22) between the two sides (24, 26) obstructed by means which are clearable based on the pressure, where said shuttle-valve (16) is mobile between: a first position allowing connection to the first outlet and the second outlet and isolating the inlet from the first outlet and the second outlet; and a second position allowing connection of the inlet with the first outlet and isolating the second outlet from the inlet and the first outlet.

A pressurization device for pressurizing an enclosure may include a container containing a pressurized fluid, a pin that is inserted into the container, an actuator, and a heating device operably coupled to the actuator. The actuator may initially hold the pin in a closed position and allow the pin to move to an open position, disengaging from the container when the actuator increases in temperature. The pressurized fluid may force the pin toward the open position to release the pressurized fluid from the container. The actuator may include a frangible hollow bulb configured to fracture at a pre-defined temperature. The pressurized fluid may be vented into the enclosure through at least one fluid passage in fluid communication between the enclosure and the container.

A pressurization device for pressurizing an enclosure may include a container containing a pressurized fluid, a pin that is inserted into the container, an actuator, and a heating device operably coupled to the actuator. The actuator may initially hold the pin in a closed position and allow the pin to move to an open position, disengaging from the container when the actuator increases in temperature. The pressurized fluid may force the pin toward the open position to release the pressurized fluid from the container. The actuator may include a frangible hollow bulb configured to fracture at a pre-defined temperature. The pressurized fluid may be vented into the enclosure through at least one fluid passage in fluid communication between the enclosure and the container.

Disclosed are an explosion-proof valve and a battery. The explosion-proof valve includes a main body. The main body is provided with a score and a buffer groove, both of which are racetrack-shaped. The score includes a deep groove section and a shallow groove section. The shallow groove section has a depth of D, a distance between a bottom wall of the shallow groove section and a bottom wall of the main body is T1, and a distance between a bottom wall of the deep groove section and the bottom wall of the main body is T2. A distance between a bottom wall of the buffer groove and the bottom wall of the main body is T3, wherein D>0, T3>T2, and T1>T2.