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19 条记录 (耗时 0.05 秒)

    Shutdown strategy for enhanced water management
    12.
    发明授权
    Shutdown strategy for enhanced water management 有权
    加强水管理的停机策略

    公开(公告)号：US08192885B2

    公开(公告)日：2012-06-05

    申请号：US12359736

    申请日：2009-01-26

    申请人： Pinkhas A. Rapaport ,  Steven R. Falta ,  Derek R. Lebzelter ,  Eric J. Connor

    发明人： Pinkhas A. Rapaport ,  Steven R. Falta ,  Derek R. Lebzelter ,  Eric J. Connor

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04179 ,  H01M8/04126 ,  H01M8/04223 ,  H01M8/04225 ,  H01M8/04228 ,  H01M2008/1095

    摘要： A system and method for providing a fuel cell stack purge to remove excess water during system shut-down. A compressor is operated at a shut-down speed to force water out of the cathode flow channels and draw water through the membrane from the anode flow channels so that a desired amount of water is removed from the fuel cell stack without over drying the membrane. The cathode shut-down purge flow can be introduced in the forward or reverse direction. Further, the flow of hydrogen fuel can be directed so that it flows through the anode flow channels in an opposite direction to push water out of an anode outlet manifold into the anode flow channels so that it will also be drawn through the membrane by the cathode airflow. Finally, a brief rehydration step is added after the shut-down purge to achieve the desired water content in the cells.

    摘要翻译： 一种用于在系统关闭期间提供燃料电池堆吹扫以去除多余水的系统和方法。 压缩机以关闭速度运行以迫使水从阴极流动通道中流出并从阳极流动通道吸入水通过膜，使得从燃料电池堆中除去所需量的水而不过度干燥膜。 阴极关闭清洗流可以沿正向或反向引入。 此外，可以引导氢燃料的流动，使得其沿相反方向流过阳极流动通道，以将水从阳极出口歧管推出到阳极流动通道中，使得其也将被阴极拉伸通过膜 气流。 最后，在关闭吹扫之后添加简单的补液步骤，以达到细胞中所需的水含量。

    Method of operating a fuel cell stack by monitoring membrane hydration
    13.
    发明授权
    Method of operating a fuel cell stack by monitoring membrane hydration 有权
    通过监测膜水合来操作燃料电池堆的方法

    公开(公告)号：US07947400B2

    公开(公告)日：2011-05-24

    申请号：US11464226

    申请日：2006-08-14

    申请人： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  John C. Fagey

    发明人： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  John C. Fagey

    IPC分类号： H01M8/04 ,  H01M8/10

    CPC分类号： H01M8/04126 ,  H01M8/04313 ,  H01M8/04529 ,  H01M8/0485 ,  H01M8/04992 ,  H01M8/248 ,  H01M2008/1095

    摘要： An electrochemical conversion assembly (10) is provided comprising a plurality of electrochemical conversion cells arranged in a conductively coupled fuel cell stack (20), a condition sensor (30, 40) operatively coupled to the fuel cell stack (20), and a programmable controller operatively coupled to the condition sensor and the fuel cell stack. The condition sensor is configured to measure a rate of change of hydration in the proton exchange membrane and either the condition sensor or the programmable controller is configured to generate a signal indicative of the measured rate of change of hydration. The programmable controller is configured to facilitate control of at least one operating parameter of the electrochemical conversion assembly by monitoring the signal indicative of the measured rate of change of hydration. The condition sensor can be configured to detect a dimensional change or a change in compression of the conductively coupled fuel cell stack as the membrane hydration changes. Additional embodiments are disclosed.

    摘要翻译： 提供了电化学转化组件（10），其包括布置在导电耦合的燃料电池堆（20）中的多个电化学转换单元，可操作地耦合到燃料电池堆（20）的状态传感器（30,40）和可编程 控制器可操作地耦合到状态传感器和燃料电池堆。 条件传感器被配置为测量质子交换膜中的水合变化率，条件传感器或可编程控制器被配置为产生指示测量的水合变化率的信号。 可编程控制器被配置为通过监测指示测量的水合变化率的信号来促进对电化学转化组件的至少一个操作参数的控制。 条件传感器可以被配置为当膜水合变化时检测导电耦合燃料电池堆的尺寸变化或压缩变化。 公开了另外的实施例。

    Stack operation method aimed at cell reversal prevention
    15.
    发明授权
    Stack operation method aimed at cell reversal prevention 有权
    针对细胞逆转预防的堆叠操作方法

    公开(公告)号：US08524408B2

    公开(公告)日：2013-09-03

    申请号：US12567438

    申请日：2009-09-25

    申请人： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  Amit Nayar

    发明人： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  Amit Nayar

    IPC分类号： H01M8/04 ,  H01M8/02

    CPC分类号： H01M8/04552 ,  H01M8/04582 ,  H01M8/04641 ,  H01M8/0494 ,  H01M2008/1095

    摘要： A method for preventing a fuel cell voltage potential reversal including determining a relationship between the cell resistance and the current of a fuel cell stack at which a fuel cell voltage potential reversal will occur, operating the fuel cell stack according to a power demand requested, and determining the maximum cell resistance of the fuel cells in the stack. If the maximum cell resistance exceeds a threshold value for the current at which the fuel cell stack is being operated, the operation of the fuel cell stack is restricted to prevent the fuel cell voltage potential from reversing.

    摘要翻译： 一种用于防止燃料电池电压电位反转的方法，包括确定电池电阻与将发生燃料电池电压电位反转的燃料电池组的电流之间的关系，根据所要求的功率需求来操作燃料电池堆;以及 确定堆叠中的燃料电池的最大电池电阻。 如果最大电池电阻超过用于操作燃料电池堆的电流的阈值，则限制燃料电池堆的操作以防止燃料电池电压电势反转。

    STACK OPERATION METHOD AIMED AT CELL REVERSAL PREVENTION
    17.
    发明申请
    STACK OPERATION METHOD AIMED AT CELL REVERSAL PREVENTION 有权
    细胞逆转预防的堆叠手术方法

    公开(公告)号：US20110076581A1

    公开(公告)日：2011-03-31

    申请号：US12567438

    申请日：2009-09-25

    申请人： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  Amit Nayar

    发明人： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  Amit Nayar

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04552 ,  H01M8/04582 ,  H01M8/04641 ,  H01M8/0494 ,  H01M2008/1095

    摘要： A method for preventing a fuel cell voltage potential reversal including determining a relationship between the cell resistance and the current of a fuel cell stack at which a fuel cell voltage potential reversal will occur, operating the fuel cell stack according to a power demand requested, and determining the maximum cell resistance of the fuel cells in the stack. If the maximum cell resistance exceeds a threshold value for the current at which the fuel cell stack is being operated, the operation of the fuel cell stack is restricted to prevent the fuel cell voltage potential from reversing.

    摘要翻译： 一种用于防止燃料电池电压电位反转的方法，包括确定电池电阻与将发生燃料电池电压电位反转的燃料电池组的电流之间的关系，根据所要求的功率需求来操作燃料电池堆;以及 确定堆叠中的燃料电池的最大电池电阻。 如果最大电池电阻超过用于操作燃料电池堆的电流的阈值，则限制燃料电池堆的操作以防止燃料电池电压电势反转。