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    SHUTDOWN OPERATIONS FOR AN UNSEALED CATHODE FUEL CELL SYSTEM
    1.
    发明申请
    SHUTDOWN OPERATIONS FOR AN UNSEALED CATHODE FUEL CELL SYSTEM 审中-公开
    用于无负载CATHODE燃料电池系统的关闭操作

    公开(公告)号：US20090263679A1

    公开(公告)日：2009-10-22

    申请号：US12103939

    申请日：2008-04-16

    申请人： Gary M. Robb ,  Hubert A. Gasteiger ,  Balasubramanian Lakshmanan ,  Paul Taichiang Yu ,  Steven G. Goebel ,  Frederick T. Wagner

    发明人： Gary M. Robb ,  Hubert A. Gasteiger ,  Balasubramanian Lakshmanan ,  Paul Taichiang Yu ,  Steven G. Goebel ,  Frederick T. Wagner

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04231 ,  H01M8/04559 ,  H01M8/04955

    摘要： Processes to shut down a fuel cell system are described. In one implementation (300), a load (215) is cyclically engaged and disengaged across a fuel cell stack (205) so as to deplete the fuel available to the system's fuel cells (205). Voltage and/or current thresholds may be used to determine when to engage and disengage the load (215) and when to terminate the shutdown operation. In another implementation (500), a variable load (405) is engaged and adjusted so as to deplete the fuel available to the system's fuel cells (205). As before, voltage and/or current thresholds may be used to determine when to adjust the load (405) and when to terminate the shutdown process. In still another implementation, a load (215 or 405) may be periodically engaged and disengaged during some portion of the shutdown process and engaged but adjusted during other portions of the shutdown process.

    摘要翻译： 描述关闭燃料电池系统的过程。 在一个实施方案（300）中，负载（215）在燃料电池堆（205）周期性地接合和分离，从而消耗可用于系统燃料电池（205）的燃料。 可以使用电压和/或电流阈值来确定何时接合和解除负载（215）以及何时终止关机操作。 在另一实施方案（500）中，接合和调节可变负载（405）以便耗尽系统燃料电池（205）可用的燃料。 如前所述，可以使用电压和/或电流阈值来确定何时调整负载（405）以及何时终止关机过程。 在另一个实施方案中，在关闭过程的某些部分期间，负载（215或405）可以周期性地接合和分离，并且在关闭过程的其他部分期间被接合但被调整。

    Life extension of PEM fuel cell using startup method
    3.
    发明授权
    Life extension of PEM fuel cell using startup method 有权
    使用启动方法延长PEM燃料电池寿命

    公开(公告)号：US08828616B2

    公开(公告)日：2014-09-09

    申请号：US12262785

    申请日：2008-10-31

    申请人： Clark G. Hochgraf ,  Paul Taichiang Yu ,  Frederick T. Wagner ,  Robert S. Foley

    发明人： Clark G. Hochgraf ,  Paul Taichiang Yu ,  Frederick T. Wagner ,  Robert S. Foley

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04753 ,  H01M8/04223 ,  H01M8/04225 ,  H01M8/0494 ,  H01M2250/20 ,  Y02E60/50 ,  Y02T90/32

    摘要： A fuel cell system that employs a technique for reducing or significantly eliminating the MEA degradation that occurs as a result of the hydrogen-air front in the anode flow channels at system start-up. After system shut-down, any hydrogen remaining within the anode flow channels will be quickly reacted or diffused. At the next start-up, a switch is closed to provide a dead short across the positive and negative terminals of the fuel cell stack as hydrogen is being introduced into the anode flow channels. The existing air in the cathode flow channels reacts with the hydrogen being introduced across the membrane in the normal fuel cell reaction. However, the short prevents a voltage potential across the membrane.

    摘要翻译： 一种燃料电池系统，其采用用于减少或显着消除在系统启动时由于阳极流动通道中的氢空气前沿而发生的MEA劣化的技术。 系统关闭后，残留在阳极流动通道内的任何氢气将迅速反应或扩散。 在下一次启动时，当氢被引入阳极流动通道时，开关闭合以在燃料电池堆的正极和负极端子之间提供死点。 阴极流动通道中的现有空气与在正常燃料电池反应中跨过膜引入的氢反应。 然而，短路防止跨膜的电压。

    LIFE EXTENSION OF PEM FUEL CELL USING STARTUP METHOD
    4.
    发明申请
    LIFE EXTENSION OF PEM FUEL CELL USING STARTUP METHOD 有权
    使用启动方法延长PEM燃料电池

    公开(公告)号：US20100112382A1

    公开(公告)日：2010-05-06

    申请号：US12262785

    申请日：2008-10-31

    申请人： Clark G. Hochgraf ,  Paul Taichiang Yu ,  Frederick T. Wagner ,  Robert S. Foley

    发明人： Clark G. Hochgraf ,  Paul Taichiang Yu ,  Frederick T. Wagner ,  Robert S. Foley

    IPC分类号： H01M8/04 ,  H01M8/02

    CPC分类号： H01M8/04753 ,  H01M8/04223 ,  H01M8/04225 ,  H01M8/0494 ,  H01M2250/20 ,  Y02E60/50 ,  Y02T90/32

    摘要： A fuel cell system that employs a technique for reducing or significantly eliminating the MEA degradation that occurs as a result of the hydrogen-air front in the anode flow channels at system start-up. After system shut-down, any hydrogen remaining within the anode flow channels will be quickly reacted or diffused. At the next start-up, a switch is closed to provide a dead short across the positive and negative terminals of the fuel cell stack as hydrogen is being introduced into the anode flow channels. The existing air in the cathode flow channels reacts with the hydrogen being introduced across the membrane in the normal fuel cell reaction. However, the short prevents a voltage potential across the membrane.

    摘要翻译： 一种燃料电池系统，其采用用于减少或显着消除在系统启动时由于阳极流动通道中的氢空气前沿而发生的MEA劣化的技术。 系统关闭后，残留在阳极流动通道内的任何氢气将迅速反应或扩散。 在下一次启动时，当氢被引入阳极流动通道时，开关闭合以在燃料电池堆的正极和负极端子之间提供死点。 阴极流动通道中的现有空气与在正常燃料电池反应中跨过膜引入的氢反应。 然而，短路防止跨膜的电压。

    Procedures for shutting down fuel cell system by using air purge at low cell temperature
    5.
    发明授权
    Procedures for shutting down fuel cell system by using air purge at low cell temperature 有权
    在低电池温度下使用空气吹扫关闭燃料电池系统的程序

    公开(公告)号：US07270904B2

    公开(公告)日：2007-09-18

    申请号：US10920838

    申请日：2004-08-18

    申请人： Paul Taichiang Yu ,  Frederick T. Wagner

    发明人： Paul Taichiang Yu ,  Frederick T. Wagner

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04231

    摘要： A fuel cell system that employs a procedure for delaying an air purge of a fuel cell stack at system shut-down until the temperature of the stack is reduced below a predetermined temperature. The fuel cell stack includes an anode side, a cathode side, an anode input, a cathode input and an anode exhaust. The system includes a temperature sensor for monitoring the temperature of a cooling fluid flowing through the stack. The anode side of the fuel cell stack is purged at the stack shut-down by directing air from the cathode input line to the anode input line after the temperature of the cooling fluid is reduced to a predetermined temperature.

    摘要翻译： 一种燃料电池系统，其采用在系统关闭时延迟燃料电池堆的空气吹扫的程序，直到堆的温度降低到预定温度以下。 燃料电池堆包括阳极侧，阴极侧，阳极输入，阴极输入和阳极排气。 该系统包括温度传感器，用于监测流过堆叠的冷却流体的温度。 在冷却流体的温度降低到预定温度之后，通过将空气从阴极输入管线引导至阳极输入管线，将燃料电池堆的阳极侧排除在堆叠关闭状态。

    Method of mitigating fuel cell degradation due to startup and shutdown via hydrogen/nitrogen storage
    8.
    发明授权
    Method of mitigating fuel cell degradation due to startup and shutdown via hydrogen/nitrogen storage 有权
    通过氢气/氮气储存减少由于启动和停机导致的燃料电池劣化的方法

    公开(公告)号：US08492046B2

    公开(公告)日：2013-07-23

    申请号：US11612120

    申请日：2006-12-18

    申请人： Paul Taichiang Yu ,  Frederick T. Wagner ,  Glenn W. Skala ,  Balsu Lakshmanan ,  John P. Salvador

    发明人： Paul Taichiang Yu ,  Frederick T. Wagner ,  Glenn W. Skala ,  Balsu Lakshmanan ,  John P. Salvador

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04753 ,  H01M8/04089 ,  H01M16/006 ,  H01M2008/1095

    摘要： A method of operating the fuel cell stack having an anode side and a cathode side by flowing hydrogen into the anode side and flowing air into the cathode side. The fuel cell produces electricity that is used to operate a primary electrical device. To shut down the stack in one embodiment, the primary electrical device is disconnected from the stack. The flow of air into the cathode side is stopped and positive hydrogen pressure is maintained on the anode side. The fuel cell stack is shorted and oxygen in the cathode side is allowed to be consumed by hydrogen. The inlet and outlet valves of the anode and the cathode sides are closed. Thereafter, the flow of hydrogen into the anode side is stopped and the flow of exhaust from the cathode side is stopped.

    摘要翻译： 通过将氢气流入阳极侧并将空气流入阴极侧来操作具有阳极侧和阴极侧的燃料电池堆的方法。 燃料电池产生用于操作主要电气设备的电力。 为了在一个实施例中关闭堆叠，主电气设备与堆叠断开。 进入阴极侧的空气流停止，阳极侧保持正的氢气压力。 燃料电池堆被短路，阴极侧的氧被氢气所消耗。 阳极和阴极侧的入口和出口阀关闭。 此后，停止向阳极侧的氢气流，并且停止来自阴极侧的排气流。

    Method of using H2 purge for stack startup/shutdown to improve stack durability
    9.
    发明授权
    Method of using H2 purge for stack startup/shutdown to improve stack durability 有权
    使用H2吹扫进行堆栈启动/关闭以提高堆叠耐久性的方法

    公开(公告)号：US07799475B2

    公开(公告)日：2010-09-21

    申请号：US10927348

    申请日：2004-08-26

    申请人： Paul Taichiang Yu ,  Frederick T Wagner

    发明人： Paul Taichiang Yu ,  Frederick T Wagner

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04231

    摘要： A method of fuel cell shutdown and start-up is provided. The method of shutdown includes introducing hydrogen gas into the cathode passages to purge a cathode gas from the cathode passages, then introducing air through the cathode and anode passages to remove water droplets and vapor from the fuel cell stacks. The method from fuel cell start-up includes introducing hydrogen gas into the anode and cathode passages to consume/purge oxygen in both the anode and cathode passages, and then introducing a cathode gas into the cathode passages. The introduction of hydrogen into the cathode passages in both the shutdown and start-up procedures allow a rapid draw down of the anode/cathode open circuit voltage and avoids providing a hydrogen/air front while the cathode is filled with air.

    摘要翻译： 提供燃料电池关闭和启动的方法。 关闭的方法包括将氢气引入阴极通道以从阴极通道中吹扫阴极气体，然后通过阴极和阳极通道引入空气以从燃料电池堆中除去水滴和蒸气。 燃料电池启动的方法包括将氢气引入阳极和阴极通道以消耗/清除阳极和阴极通道中的氧气，然后将阴极气体引入阴极通道。 在停机和启动过程中，将氢气引入阴极通道允许阳极/阴极开路电压的快速下降，并避免在阴极充满空气时提供氢气/空气前沿。

    METHOD OF MITIGATING FUEL CELL DEGRADATION DUE TO STARTUP AND SHUTDOWN VIA HYDROGEN/NITROGEN STORAGE
    10.
    发明申请
    METHOD OF MITIGATING FUEL CELL DEGRADATION DUE TO STARTUP AND SHUTDOWN VIA HYDROGEN/NITROGEN STORAGE 有权
    通过氢/氮储存启动和关闭时减少燃料电池降解的方法

    公开(公告)号：US20080145716A1

    公开(公告)日：2008-06-19

    申请号：US11612120

    申请日：2006-12-18

    申请人： Paul Taichiang Yu ,  Frederick T. Wagner ,  Glenn W. Skala ,  Balsu Lakshmanan ,  John P. Salvador

    发明人： Paul Taichiang Yu ,  Frederick T. Wagner ,  Glenn W. Skala ,  Balsu Lakshmanan ,  John P. Salvador

    IPC分类号： H01M8/02

    CPC分类号： H01M8/04753 ,  H01M8/04089 ,  H01M16/006 ,  H01M2008/1095

    摘要： A method of operating the fuel cell stack having an anode side and a cathode side by flowing hydrogen into the anode side and flowing air into the cathode side. The fuel cell produces electricity that is used to operate a primary electrical device. To shut down the stack in one embodiment, the primary electrical device is disconnected from the stack. The flow of air into the cathode side is stopped and positive hydrogen pressure is maintained on the anode side. The fuel cell stack is shorted and oxygen in the cathode side is allowed to be consumed by hydrogen. The inlet and outlet valves of the anode and the cathode sides are closed. Thereafter, the flow of hydrogen into the anode side is stopped and the flow of exhaust from the cathode side is stopped.

    摘要翻译： 通过将氢气流入阳极侧并将空气流入阴极侧来操作具有阳极侧和阴极侧的燃料电池堆的方法。 燃料电池产生用于操作主要电气设备的电力。 为了在一个实施例中关闭堆叠，主电气设备与堆叠断开。 进入阴极侧的空气流停止，阳极侧保持正的氢气压力。 燃料电池堆被短路，阴极侧的氧被氢气所消耗。 阳极和阴极侧的入口和出口阀关闭。 此后，停止向阳极侧的氢气流，并且停止来自阴极侧的排气流。