发明名称 |
Fuel cell system back-pressure control with a discrete valve |
摘要 |
A fuel cell system that employs a two-position valve at the cathode exhaust gas output for controlling the pressure within the fuel cell stack to control the stack relative humidity. In one embodiment, the two-position valve is switchable between a fully open and a fully closed position, where the valve is opened when the fuel cell system is operating at a low operation temperature and the valve is closed when the fuel cell system is operating at a high operation temperature. A fixed restriction valve is provided in parallel with the two-position valve so that when the two-position valve is fully closed, the proper amount of pressure is provided at the cathode output. In another embodiment, the two-position valve employs sized leak paths so that when the two-position valve is in the closed position, the cathode exhaust gas can still flow through.
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申请公布号 |
US2005186457(A1) |
申请公布日期 |
2005.08.25 |
申请号 |
US20040785654 |
申请日期 |
2004.02.24 |
申请人 |
CLINGERMAN BRUCE J.;SALVADOR JOHN P.;JAMES RONALD L. |
发明人 |
CLINGERMAN BRUCE J.;SALVADOR JOHN P.;JAMES RONALD L. |
分类号 |
H01M8/00;B60L11/18;H01M8/04;H01M8/10;(IPC1-7):H01M8/04 |
主分类号 |
H01M8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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