CONTROL METHOD FOR PRESSURE FLOW OSCILLATION IN THE ANODE OF FUEL CELL STACK

摘要

PURPOSE: A controlling method of pressure variation in a fuel electrode is provided to improve fuel efficiency and to improve durability of a fuel cell stack. CONSTITUTION: A controlling method of pressure variation in a fuel electrode comprises a step of detecting driving information including standard power, and difference of standard pressures between a two points near a fuel electrode (S20); a step of controlling the inner pressure of the fuel electrode in the electronic controller when current power is lower than the standard power; and a step of controlling the operational period of a purge valve from the electronic controller when the measured pressure is lower than the standard pressure (S230). [Reference numerals] (AA,DD,EE) No; (BB,CC,FF) Yes; (S10) Operation start; (S100) Vibration frequency f=0; (S110) Pressure control P_target_1=func (I); (S120) Continue operation?; (S20) Fuel electrode operation pressure / pressure vibration basic mapping; (S200) Vibration frequency f ≠ 0; (S210) Fuel electrode pressure frequency control; (S220) Monitoring the difference of pressures of an inlet and an outlet of the fuel electrode; (S230) Fuel electrode pressure difference >= standard pressure difference; (S231) Reduce a purge valve operation period; (S232) Keep or increase a purge valve operation period; (S30) Lead >= standard power; (S40) Operation end