Anti-propagation exhaust device for aircraft lithium-ion batteries

An assembly for supplying power to an aircraft, comprising:

• a plurality of housings, each housing a respective battery, each housing being suitable for being carried on board an aircraft and comprising a wall in which a through-opening is arranged, and
• an exhaust device, comprising:
• a discharge duct suitable for connecting the opening of each housing to a discharge port common to all housings, the common discharge port leading to outside the aircraft,
• a plurality of first valves, each mounted on the opening of a respective housing,
• a pressure relief valve suitable for mounting on the common discharge port,
• wherein each first valve comprises a membrane mounted on the wall of each housing in which the through-opening is arranged, so as to seal closed said opening, and is configured to burst when a pressure exerted on the membrane inside the housing exceeds an internal bursting pressure valve, or when the pressure exerted on the membrane outside the housing exceeds an external bursting pressure value,
• wherein the internal bursting pressure value is lower than the external bursting pressure, and
• wherein the pressure relief valve is configured to close off the common discharge port as long as the pressure in the discharge duct is lower than a threshold pressure value that is less than the external bursting pressure of the first membranes, and to allow fluid communication to the outside of the aircraft when the pressure in the discharge duct reaches said threshold pressure.