H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 8/02 (2006.01)
Patent
CA 2685573
The invention relates to a repeater unit (10) for a fuel cell stack (8), comprising a membrane electrode assembly (20) and a flow field (30), designed to supply an active surface (22) of the membrane electrode assembly (20) with gas (32) and which has at least one gas through opening (34). According to the invention, a gas-tight flow barrier (36) is arranged between the active surface (22) and the gas through opening (34), such that gas (32), flowing through the first gas through opening (34) flows around the gas flow barrier (36), wherein the projection of the gas flow barrier (36) on the edge of the active surface (22) is at least half as long as the projection of the gas through opening (34) on the edge of the active surface (22).
La présente invention concerne une unité récurrente (10) destinée à un empilement de piles à combustible (8), comprenant une unité électrode à membrane (20) et un champ de flux (30) qui est conçu pour alimenter une surface active (22) de l'unité électrode à membrane (20) avec du gaz (32) et qui présente au moins une ouverture de passage de gaz (34). Selon l'invention, une barrière anti-circulation de gaz (36) imperméable aux gaz est disposée entre la surface active (22) et l'ouverture de passage de gaz (34) de sorte que le gaz (32) qui passe par la première ouverture de passage de gaz (34) contourne la barrière anti-circulation de gaz (36), la projection de la barrière anti-circulation de gaz (36) sur le bord de la surface active (22) ayant une longueur qui vaut au moins la moitié de celle de la projection de l'ouverture de passage de gaz (34) sur le bord de la surface active (22).
Gowling Lafleur Henderson Llp
Staxera Gmbh
LandOfFree
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