| 摘要 |
The present invention relates to a system for controlling peripherals of a direct methanol fuel cell and a method thereof wherein the performance of a direct methanol fuel cell is improved by factoring in the load condition and the concentration of diluted fuel to control the supply of fuel. The system comprises: a fuel cell stack generating power using diluted fuel and oxygen in air containing water and methanol; electronic peripherals sensing and outputting current and voltage of the fuel cell stack; mechanical peripherals controlling the amount and concentration of the diluted fuel and oxygen from the fuel cell stack by controlling a water pump, an undiluted solution pump, a methanol sensor pump and a blower; and a control unit classifying the amount of the load of the fuel cell stack into a plurality of phases, controlling the supply of the diluted fuel and air for the mechanical peripherals to have constant stoichiometric ratio depending on each phase and supplying the diluted fuel and air to the fuel cell stack. [Reference numerals] (10) Fuel cell stack; (12) Electronic peripherals; (16) Peripheral control unit; (20) Display unit; (30) Temperature sensor; (32) Blower; (34) Cathode fan; (36) Anode fan; (40) Diluted fuel tank; (42) Water tank; (44) Undiluted fuel tank; (46) Diluted fuel pump; (48) Water pump; (50) Undiluted fuel tank; (52) Diluted fuel sensor; (54) Undiluted fuel sensor; (56) Methanol sensor; (58) Methanol sensor pump; (AA) Current/voltage; (BB) Dilute fuel concentration; (CC) Dilute fuel amount; (DD) Undiluted fuel amount; (EE) Fuel cell stack temperature; (FF) Cathode temperature; (GG) Anode temperature |
