Patent ID: 7704620
Filing Date: 2010-04-27
Classification: H01M,Y02E

Abstract:
1. A fuel cell system comprising: a fuel cell stack separated into a plurality of stack stages, each stack stage including a plurality of fuel cells, each fuel cell including cathode flow channels; a first flow pipe for providing a fresh cathode gas flow to a first stage of the plurality of stages of the fuel cell stack; a second flow pipe receiving a cathode exhaust gas flow from the first stage and fresh cathode gas flow, wherein the cathode exhaust gas flow and the fresh cathode gas flow are combined and sent to a second stage of the plurality of stages of the fuel cell stack; and a first flow restriction positioned within the second flow pipe, said first flow restriction controlling the flow of the cathode gas flow to the second stage, said first flow restriction including a plurality of elongated flow members for providing a laminar flow characteristic through the first flow restriction to the second stage.