Fuel cell unit and fuel cell stack
AssigneeCanon Kabushiki Kaisha
InventorsShinnosuke Koji, Satoshi Mogi
Life of this patent
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Abstract
There is provided a fuel cell unit and a fuel cell stack including a flow rate controlling member provided in an anode flow path on the side of an exhaust flow path so as to be in contact with an anode gas diffusion layer wherein the flow rate controlling member generates pressure difference between an upstream side of the fuel flow path from a portion at which the flow rate controlling member is provided and a downstream side of the fuel flow path from the portion at which the flow rate controlling member is provided. The fuel cell unit and the fuel cell stack can uniformly supply a fuel and can prevent backflow of the fuel containing an impurity gas from a downstream side.
Claims13
A fuel cell unit, comprising:
- an anode gas diffusion layer and an anode flow path on a side to which a fuel gas is introduced;
- a supply flow path having a supply port of the fuel gas, the supply flow path being connected upstream of the anode flow path to which the fuel gas is introduced;
- an exhaust flow path having an exhaust port of the fuel gas, the exhaust flow path being connected downstream of the anode flow path to which the fuel gas is introduced, the supply flow path, the anode flow path, and the exhaust flow path forming a fuel flow path;
- and
- a first flow rate controlling member provided in the fuel flow path on a side of the exhaust flow path to be in contact with the anode gas diffusion layer,
- wherein, by the first flow rate controlling member, pressure difference is generated between an upstream side of the fuel flow path from a portion at which the first flow rate controlling member is provided and a downstream side of the fuel flow path from the portion at which the first flow rate controlling member is provided.
Dependencies are inferred from the claim text.