Fuel cell system, control method for the fuel cell system, and vehicle equipped with the fuel cell system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMichio Yoshida, Atsushi Imai
Life of this patent
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Abstract
A fuel cell system includes a fuel cell, a secondary cell, and a control portion that controls the amount of electricity generated when the fuel cell is started. A start-time target voltage is set so as to avoid the overcharged state of the secondary cell. A voltage adjustment portion that adjusts the output voltage of the fuel cell between an open-circuit voltage and a high-potential-avoiding voltage adjusts the amount of electricity generated at the time of starting the fuel cell, on the basis of the start-time target voltage.
Claims8
A fuel cell system comprising:
- a fuel cell that generates electricity through an electrochemical reaction between a fuel gas and an oxidant gas;
- a secondary cell that is chargeable and dischargeable and that is charged with electric power that is output from the fuel cell;
- a control portion that controls amount of electricity generated at a time of starting the fuel cell;
- a voltage adjustment portion that charges the secondary cell with surplus electric power at the time of starting the fuel cell, and that adjusts output voltage of the fuel cell between an open-circuit voltage and a high-potential-avoiding voltage;
- and
- a start-time target voltage setting portion that sets a start-time target voltage before the fuel cell starts generating electricity such that an overcharged state of the secondary cell is avoided, wherein
- the control portion controls the amount of electricity generated at the time of starting the fuel cell so that the start-time target voltage is reached.
A fuel cell system comprising:
- a fuel cell that generates electricity through an electrochemical reaction between a fuel gas and an oxidant gas;
- a secondary cell that is chargeable and dischargeable and that is charged with electric power that is output from the fuel cell;
- a voltage adjustment portion that charges the secondary cell with surplus electric power at a time of starting the fuel cell, and that adjusts output voltage of the fuel cell between an open-circuit voltage and a high-potential-avoiding voltage;
- start-time target voltage setting means for setting a start-time target voltage before the fuel cell starts generating electricity such that an overcharged state of the secondary cell is avoided;
- and
- a control portion controls the amount of electricity generated at the time of starting the fuel cell so that the start-time target voltage is reached.
A vehicle having a fuel cell system comprising:
- a fuel cell that generates electricity through an electrochemical reaction between a fuel gas and an oxidant gas;
- a secondary cell that is chargeable and dischargeable and that is charged with electric power that is output from the fuel cell;
- a control portion that controls amount of electricity generated at a time of starting the fuel cell;
- a voltage adjustment portion that charges the secondary cell with surplus electric power at the time of starting the fuel cell, and that adjusts output voltage of the fuel cell between an open-circuit voltage and a high-potential-avoiding voltage;
- and
- a start-time target voltage setting portion that sets a start-time target voltage before the fuel cell starts generating electricity such that an overcharged state of the secondary cell is avoided, wherein
- the control portion controls the amount of electricity generated at the time of starting the fuel cell so that the start-time target voltage is reached.
A control method for a fuel cell system that includes a fuel cell that generates electricity through an electrochemical reaction between a fuel gas and an oxidant gas, and a secondary cell that is chargeable and dischargeable and that is charged with electric power that is output from the fuel cell, the control method comprising:
- charging the secondary cell with surplus electric power at a time of starting the fuel cell, and adjusting output voltage of the fuel cell between an open-circuit voltage and a high-potential-avoiding voltage;
- setting a start-time target voltage before the fuel cell starts generating electricity such that an overcharged state of the secondary cell is avoided;
- and
- controlling the amount of electricity generated at the time of starting the fuel cell so that the start-time target voltage is reached.
Dependencies are inferred from the claim text.