Fuel cell manifold and fuel cell stack including the same

A fuel cell stack comprising:

• a stack unit in which a plurality of unit cells are stacked;
• and
• a manifold disposed on one surface of the stack unit to provide an inflow path for air and an outflow path for fuel, wherein the manifold comprises:
• a cover plate comprising a first air flow hole through which air passes and a first fuel flow hole through which fuel passes;
• an air guide plate comprising a plurality of flow paths spaced apart from each other for guiding air introduced into one end of the air guide plate to flow toward another end of the air guide plate;
• a fuel guide plate comprising a pattern section provided with a plurality of protrusions spaced apart from each other for guiding fuel introduced into one side of the fuel guide plate to flow toward another side of the fuel guide plate;
• and
• an auxiliary plate comprising an air inflow section configured to communicate with an outside for inflow of air introduced from the outside and a fuel outflow section configured to communicate with the outside to discharge fuel in the manifold to the outside;
• wherein the air introduced into the air inflow section of the auxiliary plate from the outside moves to the flow paths through a second air flow hole formed through the one end of the air guide plate;
• wherein a sum of a distance between adjacent flow paths of the air guide plate and a width of each of the adjacent flow paths is greater than a depth of an associated flow path;
• wherein each of the adjacent flow paths has an opening facing the second air flow hole;
• and
• wherein the fuel outflow section includes a fuel accommodation part recessed from the fuel outflow section to provide a space for inflow of fuel introduced into the auxiliary plate, and a fuel outflow path configured to connect a side wall partitioning the fuel accommodation part to a side surface of the auxiliary plate, to provide for communication of the fuel accommodation part with the outside.