| 摘要 |
PURPOSE:To prevent the overcharge of a storage battery without use of an automatic voltage controller by comparing the terminal voltage of a storage battery with allowable upper limit voltage which is previously set and controlling at least one of hydrogen supply amount and air supply amount to a fuel cell to maintain the terminal voltage to the allowable upper limit voltage or lower. CONSTITUTION:In operation of a hybrid fuel cell, the terminal voltage of a storage battery 3 detected with a voltage sensor 27 is compared with the upper limit voltage V set in a memory in a computing unit of a controller 32. When the terminal voltage exceeds the upper limit voltage, a revolution number decrease signal based on voltage difference is outputted to a fuel pump 13 and/or a blower 22 and supply amount of hydrogen and/or air to a fuel cell 2 is controlled. Output of the fuel cell 2 is decreased and the terminal voltage of the storage battery 3 is maintained so as to come near the upper limit voltage. Overcharge is prevented and charging efficiency is increased. |
