Title:
FUEL CELL SYSTEM AND CELL CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/1999/067846
Kind Code:
A1
Abstract:
A control unit (20) calculates an output required by an inverter (44) from an acquired accelerator opening (step S12), derives output current-output voltage characteristics corresponding to an acquired amount of gas to calculate from the characteristics a point where an energy conversion efficiency is highest and which is determined as an operating point of a fuel cell (36) and calculates an output power of the fuel cell (36) at that operating point (steps S16 to S20), determines an output voltage required by a battery (40) based on the difference between an inverter requirement output and a fuel cell output power and SOC of the battery (40) (step S24), controls a DC/DC converter (38) to regulate an output voltage of the DC/DC converter (38) so that an output voltage of the battery (40) is equal to the determined output voltage (step S28), and controls an inverter (44) so as to let a motor (46) consume a power equivalent to the requirement output (step S30), whereby the fuel cell (36) can be operated at an operating point where an energy conversion efficiency is high.
Inventors:
IWASE MASAYOSHI (JP)
Application Number:
PCT/JP1999/002909
Publication Date:
December 29, 1999
Filing Date:
May 31, 1999
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
IWASE MASAYOSHI (JP)
IWASE MASAYOSHI (JP)
International Classes:
B60L11/18; H01M8/00; H01M8/04; H01M16/00; H02J7/00; (IPC1-7): H01M8/04
Foreign References:
| JPH0775214A | 1995-03-17 | |||
| JPH0458463A | 1992-02-25 | |||
| JPH07105964A | 1995-04-21 | |||
| JPS63236269A | 1988-10-03 |
Other References:
See also references of EP 1091437A4
Attorney, Agent or Firm:
Igarashi, Takao (Nishiki 1-chome Naka-ku Nagoya-shi Aichi, JP)
Download PDF: