| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method observing a power generating state inside a fuel cell in order to operate the fuel cell in the optimum state. <P>SOLUTION: The current distribution measuring method of a stacked fuel cell is that an air electrode is joined on one side of an electrolyte and a fuel electrode is joined on the other side, they are interposed between separators each having a gas passage to form a cell of the fuel cell, the cells are stacked to form a cell stack 1 of the fuel cell, and the cell stack 1 is used to measure the current distribution, a magnetic sensor 2 is arranged in the outer peripheral part vertical to the cell stacked thickness direction of the fuel cell stack 1, a magnetic field generating when current flows in the thickness direction of the fuel ceell stack 1 is measured with the magnetic sensor 2, and the current distribution of the fuel cell stack 1 is measured based on the measured magnetic field. The cause of a drop in power generation capacity is determined from a part where the power generation capacity is dropped in the fuel cell cell, and operation restoring the drop in the power generation capacity can be conducted. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
