IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0077232
(2005-03-11)
|
등록번호 |
US-7582370
(2009-09-16)
|
우선권정보 |
JP-2004-092564(2004-03-26) |
발명자
/ 주소 |
- Goto, Kenichi
- Kamihara, Tetsuya
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
5 |
초록
▼
A fuel cell system includes a fuel cell stack comprising an anode (fuel electrode) and a cathode (oxidizer electrode), and a system startup run is conducted at the system startup to bring the fuel cell stack into a power extractable state (idle state). In the fuel cell system, air supply flow is con
A fuel cell system includes a fuel cell stack comprising an anode (fuel electrode) and a cathode (oxidizer electrode), and a system startup run is conducted at the system startup to bring the fuel cell stack into a power extractable state (idle state). In the fuel cell system, air supply flow is controlled so that air in an amount larger than a reference flow required to bring the fuel cell stack into the power extractable state, is supplied to the cathode over a preset time from the start of air supply to the cathode, by estimating an amount of hydrogen present on the cathode, deciding an air supply flow increment to commensurate with the estimated hydrogen amount, and controlling an air supply flow, whereby air at a flow rate provided by adding the decided increment to the reference flow, is supplied to the cathode during the system startup run, thereby allowing to effectively restrict a disadvantage in that a high concentration of hydrogen is wasted during the system startup run, without deteriorating the efficiency of the fuel cell system.
대표청구항
▼
What is claimed is: 1. A fuel cell system including a solid polymer electrolyte fuel cell configured with a fuel electrode, an oxidizer electrode, and a solid polymer membrane interposed therebetween, the solid polymer electrolyte fuel cell being operative at a startup of the fuel cell system to e
What is claimed is: 1. A fuel cell system including a solid polymer electrolyte fuel cell configured with a fuel electrode, an oxidizer electrode, and a solid polymer membrane interposed therebetween, the solid polymer electrolyte fuel cell being operative at a startup of the fuel cell system to enter a startup run of the fuel cell system, where the fuel electrode is supplied with hydrogen, and the oxidizer electrode is supplied with air at a reference flow to mature the solid polymer electrolyte fuel cell into a power extractable state, the fuel cell system comprising: a hydrogen amount estimator configured to estimate an amount of hydrogen in the oxidizer electrode at the startup of the fuel cell system; a flow increment decider configured to decide an increment of a supply flow of air to the oxidizer electrode, depending on the estimated amount of hydrogen; and an air flow controller configured to control the supply flow of air to a sum of the reference flow and the decided increment for an interval of time from a commencement of air supply to the solid polymer electrolyte fuel cell during the startup run of the fuel cell system. 2. The fuel cell system as claimed in claim 1, wherein the flow increment decider is configured to determine the interval of time from the commencement of air supply to the solid polymer electrolyte fuel cell in accordance with the decided increment of the supply flow of air. 3. The fuel cell system as claimed in claim 1, wherein the hydrogen amount estimator is configured to estimate the amount of hydrogen in the oxidizer electrode, depending on a lapse of time that is an interval time from a previous shutdown of the fuel cell system to a present startup of the fuel cell system. 4. The fuel cell system as claimed in claim 1, wherein the hydrogen amount estimator is configured to estimate the amount of hydrogen in the oxidizer electrode at the startup of the fuel cell system, depending on a temperature of the solid polymer electrolyte fuel cell at a commencement of a previous shutdown of the fuel cell system. 5. The fuel cell system as claimed in claim 1, wherein the hydrogen amount estimator is configured to estimate the amount of hydrogen in the oxidizer electrode, depending on a lapse of time that is an interval time from a previous shutdown of the fuel cell system to a present startup of the fuel cell system, and a temperature of the solid polymer electrolyte fuel cell at a commencement of the previous shutdown. 6. A fuel cell system including a solid polymer electrolyte fuel cell configured with a fuel electrode, an oxidizer electrode, and a solid polymer membrane interposed therebetween, the solid polymer electrolyte fuel cell being operative at a startup of the fuel cell system to enter a startup run of the fuel cell system, where the fuel electrode is supplied with hydrogen, and the oxidizer electrode is supplied with air at a reference flow to mature the solid polymer electrolyte fuel cell into a power extractable state, the fuel cell system comprising: hydrogen amount estimating means for estimating an amount of hydrogen in the oxidizer electrode at the startup of the fuel cell system; flow increment deciding means for deciding an increment of a supply flow of air to the oxidizer electrode, depending on the estimated amount of hydrogen; and air flow controlling means for controlling the supply flow of air to a sum of the reference flow and the decided increment for an interval of time from a commencement of air supply to the solid polymer electrolyte fuel cell during the startup run of the fuel cell system. 7. A control method, comprising controlling a fuel cell system including a solid polymer electrolyte fuel cell configured with a fuel electrode, an oxidizer electrode, and a solid polymer membrane interposed therebetween, the solid polymer electrolyte fuel cell being operative at a startup of the fuel cell system to enter a startup run of the fuel cell system, where the fuel electrode is supplied with hydrogen, and the oxidizer electrode is supplied with air at a reference flow to mature the solid polymer electrolyte fuel cell into a power extractable state, the control method further comprising: estimating an amount of hydrogen in the oxidizer electrode at the startup of the fuel cell system; deciding an increment of a supply flow of air to the oxidizer electrode, depending on the estimated amount of hydrogen; and controlling the supply flow of air to a sum of the reference flow and the decided increment for an interval of time from a commencement of air supply to the solid polymer electrolyte fuel cell during the startup run of the fuel cell system.
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