ELECTRIFIED VEHICLE BATTERY PRESSURE RELIEF STRUCTURE

A pressure relief structure for an electrified vehicle battery pack includes a valve body having a first end and a second end, and a through hole extending between the first end and the second end, a breathable membrane extending across the first end of the valve body, and a valve cover covering the breathable membrane and having fluid passages that couple the through hole to atmosphere. The valve cover include a protrusion configured to engage a first tool, and a cavity in the protrusion configured to engage a second tool. A flange structure disposed between the first end and the second end extends circumferentially and forms a secondary fluid flow path.