Patent ID: 8101313

Claim:
A flow field plate module for a fuel cell system comprising at least a flow field plate, the flow field plate comprising: a main body having a fuel-in wall provided with a fuel inlet, a fuel-out wall provided with a fuel outlet, and two corresponding side walls, which together defining a fuel transporting channel in the main body; the fuel transporting channel being divided into a middle converging zone and two diverging zones separately located at two lateral sides of the middle converging zone; the fuel inlet and the fuel outlet being provided in the middle converging zone for introducing a fuel into the fuel transporting channel via the fuel inlet flows in a first flowing direction before being discharged from the main body via the fuel outlet; a first flow guide group including a plurality of first flow guiding plates arranged in the middle converging zone to space from one another in the first flowing direction; and two second flow guide groups arranged in the two diverging zones at two opposite sides of the first flow guide group; each of the second flow guide groups including at least one second flow guiding plate; each of the second flow guiding plates being directed at an inner end toward a space between two adjacent first flow guiding plates in the middle converging zone to thereby offset from each of the two adjacent first flow guiding plates by a predetermined distance, allowing a fluid path to be formed between any two adjacent first and second flow guiding plates; wherein when the fuel is introduced into the fuel transporting channel via the fuel inlet, the fuel is repeatedly guided by the first flow guiding plates toward the two diverging zones to form two branch flows, which are then guided by the second flow guiding plates to flow toward the middle converging zone via the offset distance and form a main flow again; and the diverging and converging of the fuel repeats until the fuel is finally guided to the fuel outlet and discharged from the main body.