Fuel gas substitution device for fuel cell stack

Details Fuel gas substitution device for fuel cell stack Fuel gas substitution device for fuel cell stack

H - Electricity

01

M

H01M 8/04 (2006.01)

Patent

CA 2558320

There is provided a fuel gas supply manifold (4) which extends through a plurality of cells (1) in the stacking direction and which is adapted to introduce a fuel gas to the cells (1). There are provided a bypass passage (9) connecting the downstream end of the fuel gas supply manifold (4) to the fuel gas exhaust manifold (7), and a valve (11) for opening and closing the bypass passage (9). When starting the supply of a fuel gas to the fuel gas supply manifold (4), the valve (11) is opened, whereby most of the air in the fuel gas supply manifold (4) is driven away to the exterior through scavenging by the fuel gas by way of the bypass passage (9) without causing it to pass through the interior of the cells.

L'invention concerne un collecteur d'alimentation en gaz combustible (4), qui traverse une pluralité de cellules (1) dans le sens de l'empilement, et est conçu pour introduire un gaz combustible dans les cellules (1). On décrit un passage de dérivation (9) reliant l'extrémité aval du collecteur d'alimentation en gaz combustible (4) au collecteur d'évacuation des gaz (7), et une soupape (11) servant à ouvrir ou fermer le passage de dérivation (9). Au début de l'alimentation du collecteur (4) en gaz combustible, la soupape (11) s'ouvre et la majeure partie de l'air présent dans le collecteur d'alimentation en gaz combustible (4) est balayée par le gaz combustible et évacuée vers l'extérieur par le passage de dérivation (9), sans que l'air ne passe au travers des cellules.

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