| 摘要 |
PROBLEM TO BE SOLVED: To maintain the voltage of a fuel cell at a desired voltage while suppressing deterioration in an overall system energy efficiency even with a small load requirement.SOLUTION: A power supply system including a fuel cell is controlled to: disconnect between the fuel cell and a load and supply the fuel cell with oxygen at a pre-set condition for supplying the fuel cell with oxygen required to cause an open-circuit voltage of the fuel cell to be consistent with a target voltage in a low-load state where required power from a load is equal to or less than a predetermined reference value; then reduce an oxygen supply amount in the case of being applicable to a first voltage state where the open-circuit voltage of the fuel cell is higher than the target voltage by a first value or more, or increase the oxygen supply amount in the case of being applicable to a second voltage state where the open-circuit voltage of the fuel cell is lower than the target voltage by a second value or more, or maintain an oxygen supply amount in the case of being applicable to a voltage maintaining state that is not applicable to the first or second voltage state.SELECTED DRAWING: Figure 4 |
