Method of starting up operation of fuel cell at low temperature
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
UP-0887709
(2004-07-09)
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등록번호 |
US-7588844
(2009-09-24)
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우선권정보 |
JP-2003-272306(2003-07-09) |
발명자
/ 주소 |
- Hayashi, Katsumi
- Inai, Shigeru
- Kato, Hideo
- Jimba, Ryo
- Mohri, Masahiro
- Morikawa, Hiroshi
- Yoshida, Hiromichi
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
2 |
초록
▼
When it is detected that the temperature of the fuel cell stack is at the freezing temperature of water or less (step S1), an operation mode using a freezing temperature starting up operation control map is selected (step S2). Freezing temperature starting up operation of the fuel cell stack is perf
When it is detected that the temperature of the fuel cell stack is at the freezing temperature of water or less (step S1), an operation mode using a freezing temperature starting up operation control map is selected (step S2). Freezing temperature starting up operation of the fuel cell stack is performed according to the freezing temperature starting up operation control map (step S3). Then, when it is detected that the temperature of the fuel cell stack exceeds the freezing temperature (step S4), the operation mode using the freezing temperature starting up operation control map is switched to an operation mode using a normal starting up operation control map (step S5). Thus, normal starting up operation is performed according to the normal starting up control map (step S6).
대표청구항
▼
What is claimed is: 1. A method of starting a fuel cell at a freezing temperature of water or less, said fuel cell including an electrolyte electrode assembly, and separators sandwiching said electrolyte electrode assembly, said electrolyte electrode assembly including a pair of electrodes, and an
What is claimed is: 1. A method of starting a fuel cell at a freezing temperature of water or less, said fuel cell including an electrolyte electrode assembly, and separators sandwiching said electrolyte electrode assembly, said electrolyte electrode assembly including a pair of electrodes, and an electrolyte interposed between said electrodes, said method comprising the steps of: providing a freezing temperature operation control map, the freezing temperature operation control map including a first pressure control map for controlling pressures of a fuel gas and an oxygen-containing gas supplied to the fuel cell, and a first flow rate control map for controlling at least a flow rate of the oxygen-containing gas supplied to the fuel cell, the first pressure control map defining a relationship between the pressures of the fuel gas and the oxygen-containing gas and an output current of the fuel cell at the freezing temperature of water or less, the output current of the fuel cell increasing proportionally as the pressures of the fuel gas and the oxygen-containing gas increase in the first pressure control map, providing a normal operation control map, the normal operation control map including a second pressure control map for controlling pressures of the fuel gas and the oxygen-containing gas supplied to the fuel cell, and a second flow rate control map for controlling at least the flow rate of the oxygen-containing gas supplied to the fuel cell, the second pressure control map defining a relationship between the pressures of the fuel gas and the oxygen-containing gas and the output current of the fuel cell at a temperature higher than the freezing temperature of water, the output current of the fuel cell increasing proportionally as the pressures of the fuel gas and the oxygen-containing gas increase in the second pressure control map, wherein a first gas pressure according to the first pressure control map causes the fuel cell to generate a first level of the output current at the freezing temperature of water or less, and a second gas pressure according to the second pressure control map causes the fuel cell to generate a second level of the output current at the temperature higher than the freezing temperature of water, and the first gas pressure is greater than the second gas pressure when the first level of the output current equals the second level of the output current; selecting a first operation in which the fuel cell is controlled using the freezing temperature operation control map when it is detected that the temperature of said fuel cell is the freezing temperature of water or less, performing the first operation of said fuel cell using the pressures of the fuel gas and the oxygen-containing gas and the flow rate of the oxygen-containing gas determined from said freezing temperature operation control map to generate a required output current of the fuel cell, wherein the generated output current of the fuel cell is provided to an external circuit in the first operation; and switching from said first operation to a second operation in which the fuel cell is controlled using the normal operation control map when it is detected that temperature of said fuel cell exceeds said freezing temperature of water. 2. A method according to claim 1, wherein gas flow rates according to said freezing temperature operation control map are higher than gas flow rates according to said normal operation control map. 3. A method according to claim 1, wherein said oxygen-containing gas is compressed by a compressor, and said compressor is driven by electricity generated by said fuel cell. 4. A method according to claim 1, wherein said fuel gas is discharged from said fuel cell after consumption, and supplied again to said fuel cell by circulation. 5. A method according to claim 1, wherein said fuel gas discharged from said fuel cell is supplied again to said fuel cell by a pump provided in a circulation passage. 6. A method according to claim 1, wherein the temperature of said fuel cell is detected by a thermometer provided in an oxygen-containing gas discharge passage. 7. A method according to claim 1, wherein the step of performing the first operation comprises the steps of: supplying the fuel gas only to an anode electrode at the freezing temperature of water or less; and supplying the oxygen-containing gas only to a cathode electrode at the freezing temperature of water or less.
이 특허에 인용된 특허 (2)
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Jeffrey Allan Rock ; Lawrence Bruce Plant, Cold start-up of a PEM fuel cell.
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Fletcher Nicholas J.,CAX ; Boehm Gustav A.,DEX ; Pow Eric G.,CAX, Method and apparatus for commencing operation of a fuel cell electric power generation system below the freezing temper.
이 특허를 인용한 특허 (1)
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Staley, Scott M.; Sanderson, William F.; Milacic, Milos; Hashim, Hasdi R.; Forthoffer, Daniel William; Mathie, Craig Michael, Freeze preparation for a fuel cell system.
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