Fuel cell system, control method therefor, and movable object
AssigneeToyota Jidosha Kabushiki Kaisha
InventorMichio Yoshida
Life of this patent
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Abstract
The oxidizing gas supply is stopped during the catalyst activation treatment, and the output voltage of the fuel cell is linearly decreased toward the reduction target voltage. Once the interruption condition of the activation treatment has been satisfied, a voltage command value of the converter is returned to a standby voltage and, after waiting till the output voltage of the fuel cell returns to the vicinity of the standby voltage, the compressor is operated to start the supply of the oxidizing gas, and the catalyst activation treatment is completed. As a result, overcharging of the battery caused by rapid increase in the output power of the fuel cell is avoided.
Claims10
A fuel cell system in which a catalyst activation treatment is implemented by stopping a supply of an oxidizing gas to a cathode electrode of a fuel cell and reducing an output voltage of the fuel cell, comprising:
- a control unit which controls the output voltage of the fuel cell and the supply of the oxidizing gas to the cathode electrode of the fuel cell, wherein
- the control unit is programmed to, when the catalyst activation treatment is interrupted in the course of implementing the catalyst activation treatment, return the output voltage of the fuel cell to a standby voltage by increasing the output voltage of the fuel cell, and
- after waiting till an oxidizing gas supply condition is satisfied, resume the supply of the oxidizing gas to the cathode electrode of the fuel cell,
- wherein the oxidizing gas supply condition is that the output voltage of the fuel cell approaches the standby voltage when returning the output voltage of the fuel cell to the standby voltage.
A method for controlling a fuel cell system in which a catalyst activation treatment is implemented by stopping a supply of an oxidizing gas to a cathode electrode of a fuel cell and reducing an output voltage of the fuel cell, the method comprising the steps of:
- determining whether the catalyst activation treatment is interrupted in the course of implementing the catalyst activation treatment;
- returning the output voltage of the fuel cell to a standby voltage by increasing the output voltage of the fuel cell when the catalyst activation treatment is determined to be interrupted;
- waiting till an oxidizing gas supply condition is satisfied;
- and
- resuming the supply of the oxidizing gas to the cathode electrode of the fuel cell when the oxidizing gas supply condition is satisfied,
- wherein the oxidizing gas supply condition is that the output voltage of the fuel cell approaches the standby voltage when returning the output voltage of the fuel cell to the standby voltage.
Dependencies are inferred from the claim text.