Patent ID: 8697299
Filing Date: 2014-04-15
Classification: H01M,Y02E,Y02T

Abstract:
1. A fuel cell system, comprising: a fuel cell for generating power through electrochemical reaction between a gas to be supplied to an anode side and a gas to be supplied to a cathode side; a dilution device for diluting an anode off-gas drained from the fuel cell with a cathode off-gas and emitting the anode off-gas; and a fuel cell case for accommodating the fuel cell and the dilution device in an interior thereof wherein a side surface opening of the fuel cell case, through which an emission pipe extending toward downstream in an emission direction of the dilution device passes, is formed at a position upper in a gravity direction than a lowest portion of an inner surface of the dilution device, wherein the dilution device comprises a mixing portion for mixing the anode off-gas with the cathode off-gas, an anode off-gas introduction pipe connected to the mixing portion for ejecting the anode off-gas into the mixing portion, and a cathode off-gas introduction pipe connected to the mixing portion for introducing the cathode off-gas into the mixing portion; and wherein the anode off-gas, which is ejected into the mixing portion from the lateral side of the horizontal direction at the substantially same height position in the gravity direction as the flow of the cathode off-gas introduced into the mixing portion in such a manner that the flow of the anode off-gas opposes the emission direction of the cathode off-gas, collides against the flow of the cathode off-gas in the mixing portion so that the anode off-gas directly expands into the flow of the cathode off-gas to facilitate the mixing of the anode off-gas and the cathode off-gas.