ONLINE OBSERVATION METHOD OF ANODE NITROGEN CONCENTRATION FOR PROTON EXCHANGE MEMBRANE FUEL CELL

An online observation method of an anode nitrogen concentration for a proton exchange membrane fuel cell is disclosed. Firstly, a dynamic model of anode nitrogen concentration is established based on a gas transmembrane penetration model and an anode material conservation model of a fuel cell, and then an average voltage degradation value between a nitrogen partial pressure and an average monolithic cell voltage is obtained as online feedback information, an online observer of anode nitrogen concentration is established based on the dynamic model of anode nitrogen concentration and the online feedback information, and the anode nitrogen concentration of the fuel cell is obtained by the online observer. The new method solves the problem of online observation of anode nitrogen concentration during the operation of a proton exchange membrane fuel cell engine system under dynamic conditions.