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    FAST MEA BREAK-IN AND VOLTAGE RECOVERY
    3.
    发明申请
    FAST MEA BREAK-IN AND VOLTAGE RECOVERY 有权
    快速MEA断开和电压恢复

    公开(公告)号：US20130260266A1

    公开(公告)日：2013-10-03

    申请号：US13432725

    申请日：2012-03-28

    申请人： Pinkhas A. Rapaport ,  Aaron J. Blowers ,  James Leistra ,  Balasubramanian Lakshmanan

    发明人： Pinkhas A. Rapaport ,  Aaron J. Blowers ,  James Leistra ,  Balasubramanian Lakshmanan

    IPC分类号： H01M8/04 ,  H01M8/06

    CPC分类号： H01M8/04708 ,  H01M8/04223 ,  H01M8/04365 ,  H01M8/04559 ,  H01M8/04731 ,  H01M8/0488 ,  H01M8/04952 ,  H01M8/241 ,  H01M8/2457 ,  Y02E60/50

    摘要： A system and method for breaking-in and humidifying membrane-electrode-assemblies (MEAs) in a fuel cell stack. The method includes performing voltage cycling and humidification of the MEAs in the stack, including one or more temperature steps wherein current density of the stack is cycled within a predetermined range for each of the one or more temperature steps. The method also includes maintaining a fuel cell stack voltage within a predetermined range, and maintaining anode and cathode reactant flows at an approximate set-point during the current density cycling of the one or more temperature steps to break-in and humidify the MEAs in the stack so that the stack is able to operate at a predetermined threshold for a fuel cell stack voltage output capability.

    摘要翻译： 一种用于在燃料电池堆中分解和加湿膜 - 电极组件（MEA）的系统和方法。 该方法包括对堆叠中的MEA进行电压循环和加湿，包括一个或多个温度步骤，其中堆叠的电流密度在一个或多个温度步骤中的每一个的预定范围内循环。 该方法还包括将燃料电池堆电压维持在预定范围内，并且在一个或多个温度步骤的电流密度循环期间将阳极和阴极反应物流维持在近似设定点，从而在 堆叠，使得堆叠能够在燃料电池堆电压输出能力的预定阈值下操作。

    Fuel Cell Stack with Improved End Cell Performance
    4.
    发明申请
    Fuel Cell Stack with Improved End Cell Performance 审中-公开
    燃料电池堆，改善端电池性能

    公开(公告)号：US20080299418A1

    公开(公告)日：2008-12-04

    申请号：US11757843

    申请日：2007-06-04

    申请人： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  Po-Ya Abel Chuang ,  Wenbin Gu

    发明人： Yeh-Hung Lai ,  Pinkhas A. Rapaport ,  Po-Ya Abel Chuang ,  Wenbin Gu

    IPC分类号： H01M8/00

    CPC分类号： H01M8/04201 ,  H01M8/023

    摘要： A fuel cell stack that includes a gas diffusion media for the end cells in the stack that has less of an intrusion into the flow field channels of the end cells that the other cells, so as to increase the flow rate through the flow channels in the end cells relative to the flow rate through the flow channels in the other cells. A different diffusion media can be used in the end cells than the nominal cells, where the end cell diffusion media has less of a channel intrusion as a result of diffusion media characteristics. Also, the same diffusion media could be used in the end cells as the nominal cells, but the end cell diffusion media layers could be thinner than the nominal cell diffusion media layers. Further, a higher amount of pre-compression can be used for the diffusion media in the end cells.

    摘要翻译： 一种燃料电池堆，其包括用于堆叠中的末端电池的气体扩散介质，其具有较少侵入到其他电池的端电池的流场通道，以便增加通过其中的流动通道的流速 相对于通过其他电池中的流动通道的流速来说，终端电池。 在末端电池中可以使用不同的扩散介质，而不是标称电池，其中末端电池扩散介质由于扩散介质特性而具有较少的通道入侵。 此外，相同的扩散介质可以在末端电池中用作标称电池，但是终端电池扩散介质层可以比标称电池扩散介质层更薄。 此外，更高量的预压缩可以用于端电池中的扩散介质。

    Method Of Operating A Fuel Cell Stack By Monitoring Membrane Hydration
    5.
    发明申请
    Method Of Operating A Fuel Cell Stack By Monitoring Membrane Hydration 有权
    通过监测膜水化操作燃料电池堆的方法

    公开(公告)号：US20080038594A1

    公开(公告)日：2008-02-14

    申请号：US11464226

    申请日：2006-08-14

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

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

    IPC分类号： H01M8/04 ,  H01M8/24 ,  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。

    Fuel cell stack design and method of operation
    7.
    发明授权
    Fuel cell stack design and method of operation 有权
    燃料电池堆的设计和操作方法

    公开(公告)号：US06794068B2

    公开(公告)日：2004-09-21

    申请号：US10230916

    申请日：2002-08-29

    申请人： Pinkhas A. Rapaport ,  Jeffrey A. Rock ,  Andrew D. Bosco ,  John P. Salvador ,  Hubert A. Gasteiger ,  Lesley A. Paine

    发明人： Pinkhas A. Rapaport ,  Jeffrey A. Rock ,  Andrew D. Bosco ,  John P. Salvador ,  Hubert A. Gasteiger ,  Lesley A. Paine

    IPC分类号： H01M804

    CPC分类号： H01M8/0263 ,  H01M8/0258 ,  H01M8/0265 ,  H01M8/0267 ,  H01M8/04089 ,  H01M8/04156 ,  H01M8/2405 ,  H01M8/2465 ,  H01M8/249

    摘要： A fuel cell stack has at least two segments of fuel cells each having reactant gas passages. Each of the cells in each segment is arranged such that the reactant gas passages of each cell are in parallel with each other cell. Flow of fuel cell fluids, normally in a gaseous state on the anode and cathode side of each cell, is in a gravity assisted downward direction. Gravity assisted flow directs water formed in each cell to lower removal points of the stack segments. Each pair of segments is separated by a separator segment having a separator channel, the separator segment forming an integral unit of the stack. Each separator channel redirects the entire flow of each fluid within the stack from the bottom of an upstream segment to the top of a next or downstream segment, without reacting the fluid, controlling relative humidity between stack segments.

    摘要翻译： 燃料电池堆具有至少两个具有反应气体通道的燃料电池段。 每个区段中的每个单元布置成使得每个单元的反应气体通道与彼此平行的单元格。 在每个电池的阳极和阴极侧通常处于气态的燃料电池流体的流动处于重力辅助的向下的方向。 重力辅助流引导在每个电池中形成的水​​以降低堆垛段的去除点。 每对分段由具有分离器通道的分离器段分开，分离器段形成堆叠的整体单元。 每个分离器通道将堆叠内的每个流体的整个流动从上游段的底部重新定向到下一段或下游段的顶部，而不使流体反应，从而控制堆段之间的相对湿度。

    Fast MEA break-in and voltage recovery
    8.
    发明授权
    Fast MEA break-in and voltage recovery 有权
    快速MEA突破和电压恢复

    公开(公告)号：US09099703B2

    公开(公告)日：2015-08-04

    申请号：US13432725

    申请日：2012-03-28

    申请人： Pinkhas A. Rapaport ,  Aaron J. Blowers ,  James Leistra ,  Balasubramanian Lakshmanan

    发明人： Pinkhas A. Rapaport ,  Aaron J. Blowers ,  James Leistra ,  Balasubramanian Lakshmanan

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04708 ,  H01M8/04223 ,  H01M8/04365 ,  H01M8/04559 ,  H01M8/04731 ,  H01M8/0488 ,  H01M8/04952 ,  H01M8/241 ,  H01M8/2457 ,  Y02E60/50

    摘要： A system and method for breaking-in and humidifying membrane-electrode-assemblies (MEAs) in a fuel cell stack. The method includes performing voltage cycling and humidification of the MEAs in the stack, including one or more temperature steps wherein current density of the stack is cycled within a predetermined range for each of the one or more temperature steps. The method also includes maintaining a fuel cell stack voltage within a predetermined range, and maintaining anode and cathode reactant flows at an approximate set-point during the current density cycling of the one or more temperature steps to break-in and humidify the MEAs in the stack so that the stack is able to operate at a predetermined threshold for a fuel cell stack voltage output capability.

    摘要翻译： 一种用于在燃料电池堆中分解和加湿膜 - 电极组件（MEA）的系统和方法。 该方法包括对堆叠中的MEA进行电压循环和加湿，包括一个或多个温度步骤，其中堆叠的电流密度在一个或多个温度步骤中的每一个的预定范围内循环。 该方法还包括将燃料电池堆电压维持在预定范围内，并且在一个或多个温度步骤的电流密度循环期间将阳极和阴极反应物流维持在近似设定点，从而在 堆叠，使得堆叠能够在燃料电池堆电压输出能力的预定阈值下操作。

    SHUTDOWN STRATEGY FOR ENHANCED WATER MANAGEMENT
    10.
    发明申请
    SHUTDOWN STRATEGY FOR ENHANCED WATER MANAGEMENT 有权
    关于加强水管理的关键战略

    公开(公告)号：US20100190078A1

    公开(公告)日：2010-07-29

    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。