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2. 发明申请

US20100003549A1 FUEL CELL, FUEL CELL SYSTEM, AND CONTROL METHOD OF FUEL CELL SYSTEM 有权
标题翻译：燃料电池系统和燃料电池系统的控制方法
公开(公告)号：US20100003549A1
公开(公告)日：2010-01-07
申请号：US12374741
申请日：2007-09-07
申请人： Hisayoshi Ota , Kazuyori Yamada , Masaru Tsunokawa , Manabu Kato , Hiroo Yoshikawa
发明人： Hisayoshi Ota , Kazuyori Yamada , Masaru Tsunokawa , Manabu Kato , Hiroo Yoshikawa
IPC分类号： H01M8/10 , H01M8/04
CPC分类号： H01M8/04582 , H01M8/0265 , H01M8/04089 , H01M8/04231 , H01M8/04447 , H01M8/04552 , H01M8/04761
摘要： A fuel cell stack includes: a first cell having a first fuel gas flow path; and a second cell having a second fuel gas flow path constructed to have a specific flow path structure having a higher potential for a decrease in concentration of a fuel gas than that of the first fuel gas flow path during power generation. A sensor is located on the second cell to detect a decrease in concentration of the fuel gas during power generation. In one exemplified structure, a groove formed on an anode separator of the second cell as the second fuel gas flow path has a restriction element to narrow the sectional area of flow passage. A hydrogen concentration sensor is located in a non-narrowed area in the downstream of the restriction element having a lower pressure level. Impurity gas discharge control discharges an anode off gas out of the fuel cell stack, in response to detection of a decrease in hydrogen concentration to or below a preset reference level by the hydrogen concentration sensor. This arrangement of the invention enables the effective use of the fuel gas and prevents deterioration of membrane electrode assemblies of the fuel cell stack by carbon oxidation in an anode dead end-type fuel cell system.
摘要翻译：燃料电池堆包括：具有第一燃料气体流路的第一电池; 以及具有第二燃料气体流路的第二单元，其构造成具有在发电期间具有比第一燃料气体流路的燃料气体浓度降低的更高的电位的特定流路结构。传感器位于第二电池上，以检测在发电期间燃料气体浓度的降低。在一个示例性结构中，形成在作为第二燃料气体流路的第二电池的阳极隔板上的槽具有用于使流路的截面积变窄的限制元件。氢浓度传感器位于具有较低压力水平的限制元件的下游的非变窄区域中。响应于通过氢浓度传感器检测到氢浓度降低到预设参考水平或低于预设参考水平，杂质气体放电控制将阳极排出燃料电池堆。本发明的这种布置能够有效地利用燃料气体，并且通过在阳极死端型燃料电池系统中的碳氧化来防止燃料电池堆的膜电极组件的劣化。

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