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    • 71. 发明申请
    • Fuel Cell System
    • 燃料电池系统
    • US20080166609A1
    • 2008-07-10
    • US11884555
    • 2006-02-22
    • Nobuyuki Kitamura
    • Nobuyuki Kitamura
    • H01M8/04H01M8/10
    • H01M8/04291H01M8/04529H01M8/04559H01M8/04589H01M8/04649H01M8/04731H01M8/04753H01M8/0485
    • In a fuel cell system including a stack of polymer electrolyte fuel cells, the wet state of electrolyte membranes in the fuel cell stack is detected according to a variation in measurement value of an alternating current impedance (AC impedance) of the fuel cell stack. In an adequate level of water content of the electrolyte membranes, the measurement value of the AC impedance is substantially constant and has a very little variation. In an excess level of water content of the electrolyte membranes, the measurement value of the AC impedance has a significant variation. The AC impedance of the fuel cell stack is determinable by frequency analysis of high-frequency noise generated by an inverter included in the fuel cell system.
    • 在包括聚合物电解质燃料电池堆的燃料电池系统中,根据燃料电池堆的交流阻抗(AC阻抗)的测量值的变化来检测燃料电池堆中的电解质膜的湿态。 在电解质膜的水含量足够高时,AC阻抗的测量值基本上是恒定的,并且变化很小。 在电解质膜的含水量过多的情况下,AC阻抗的测量值有显着差异。 燃料电池堆的交流阻抗可以通过由包括在燃料电池系统中的逆变器产生的高频噪声的频率分析来确定。