Patent ID: 9099697
Filing Date: 2015-08-04
Classification: H01M,Y02E

Abstract:
1. A fuel cell battery comprising stacked cells, comprising a superposition of plates, called bipolar plates, between which assemblies comprising both an electrolytic membrane and an electrode on each side of the membrane are placed, the plates being provided, on their periphery, with apertures serving to deliver reactive gases, and with apertures serving to evacuate reaction products, the apertures of adjacent plates being aligned in order to form supply or evacuation manifolds that pass right through the stack of cells, and the apertures of the manifolds being encircled by individual ring joints that are separated from one another and separate from the bipolar plates, certain joints forming sealing joints between the aperture and a cell, and other joints forming injectors for a fluid to be delivered to a cell or to be evacuated from a cell, wherein the ring joints are formed from at least one nonplanar metal sheet and a complementary part, the metal sheet having a U-shaped cross section in a plane perpendicular to the plane of the apertures, the arms of the U being flared and having ends folded parallel to the bottom, the bottom bearing against the bipolar plate around the aperture or against an electrolytic membrane, the thickness of the joint corresponding to the distance between the bipolar plate and the membrane, the joints forming injectors being provided with local passages in the thickness of the joint in order to allow the fluid to pass, and the joints forming sealing joints being without such passages in order to maintain the seal, the complementary part being made of metal or polymer, and the passages being formed in the complementary part.