Szukana fraza: [Abstrakt = "The paper describes method of boosting intensity oxygen flow trough the cathode of PEM fuel cell. To that end electric pump controlled with a microcontroller was installed between cell and oxygen tank. Computer software was written which produces turn on of electric pump with a transistor at definite voltage of fuel cell and gas flow in closed cycle. This process produces increase of cell's voltage and current. Research and measurements were made for elementary fuel cells operating individually and in group. Voltage and current courses for different load were recorded. Change of fuel cell voltage in time operation with open oxygen exhaust valve and this gas flow in closed cycle was compared.Słowa kluczowe"]

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