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    Method for Improving FCS Reliability After End Cell Heater Failure
    1.
    发明申请
    Method for Improving FCS Reliability After End Cell Heater Failure 有权
    提高终端电池加热器故障后FCS可靠性的方法

    公开(公告)号：US20090110966A1

    公开(公告)日：2009-04-30

    申请号：US11925422

    申请日：2007-10-26

    申请人： Derek R. Lebzelter ,  William S. Marley ,  John P. Salvador ,  Abdullah B. Alp ,  Loren Devries

    发明人： Derek R. Lebzelter ,  William S. Marley ,  John P. Salvador ,  Abdullah B. Alp ,  Loren Devries

    IPC分类号： H01M8/00

    CPC分类号： H01M8/04037 ,  H01M8/04358 ,  H01M8/04365 ,  H01M8/04597 ,  H01M8/04679 ,  H01M8/04723 ,  H01M8/04753 ,  H01M8/04768 ,  H01M8/04835 ,  H01M8/0494

    摘要： A method for improving fuel cell system reliability in the event of end cell heater failure in a fuel cell stack. The method includes detecting that an end cell heater has failed. If an end cell heater failure is detected, then the method performs one or more of setting a cooling fluid pump to a predetermined speed that drives a cooling fluid through cooling fluid flow channels in the fuel cell stack, limiting the output power of the fuel cell stack or the net power of the fuel cell system, limiting the maximum temperature of the cooling fluid flowing out of the stack, turning off stack anti-flooding algorithms that may be used to remove water from reactant gas flow channels in the stack, and turning off cathode stoichiometry adjustments for relative humidity control in response to water accumulating in cathode flow channels in the fuel cell stack.

    摘要翻译： 一种用于在燃料电池堆中终端电池加热器故障的情况下提高燃料电池系统的可靠性的方法。 该方法包括检测终端电池加热器是否发生故障。 如果检测到终端电池加热器故障，则该方法执行一个或多个将冷却液泵设定到通过燃料电池堆中的冷却流体流动通道驱动冷却流体的预定速度，限制燃料电池的输出功率 堆叠或燃料电池系统的净功率，限制流出堆叠的冷却流体的最高温度，关闭可用于从堆叠中的反应气体流动通道去除水的堆叠防淹没算法，以及转动 响应于在燃料电池堆中的阴极流动通道中积聚的水，进行相对湿度控制的阴极化学计量调节。

    Adaptive limitation of standby mode to enhance fuel cell system life
    3.
    发明授权
    Adaptive limitation of standby mode to enhance fuel cell system life 有权
    备用模式的自适应限制，以提高燃料电池系统的使用寿命

    公开(公告)号：US08945785B2

    公开(公告)日：2015-02-03

    申请号：US13345288

    申请日：2012-01-06

    申请人： Daniel I. Harris ,  Derek R. Lebzelter ,  John P. Salvador ,  William H. Pettit ,  Akbar Chowdhury ,  Edward G. Himes

    发明人： Daniel I. Harris ,  Derek R. Lebzelter ,  John P. Salvador ,  William H. Pettit ,  Akbar Chowdhury ,  Edward G. Himes

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04955 ,  H01M8/04559

    摘要： A system and method for reducing the frequency of stack stand-by mode events, if necessary, as a fuel cell stack ages and experiences lower performance. The method determines an irreversible voltage loss of the fuel cell stack at predetermined time intervals and determines a stack voltage degradation variable based on the irreversible voltage loss. The method also determines if the stack voltage degradation variable indicates that the fuel cell stack will not meet predetermined stack end-of-life voltage requirements and calculates a maximum allowed voltage degradation rate of the fuel cell stack. The method calculates a maximum number of stand-by mode events per unit time that can be allowed to prevent the stack from exceeding the maximum allowed degradation rate and controls the number of stand-by mode events based on the calculated maximum number of stand-by mode events.

    摘要翻译： 如果需要，当燃料电池堆老化并且经历较低的性能时，用于降低堆叠待机模式事件的频率的系统和方法。 该方法以预定的时间间隔确定燃料电池堆的不可逆电压损失，并且基于不可逆的电压损耗确定堆电压劣化变量。 该方法还确定堆叠电压劣化变量是否表明燃料电池堆不能满足预定的堆积寿命电压要求并且计算燃料电池堆的最大允许电压降低率。 该方法计算出每单位时间的待机模式事件的最大次数，可以被允许以防止堆栈超过允许的最大降级率，并根据计算的最大待机数量控制待机模式事件的数量 模式事件。

    Subzero ambient shutdown purge operating strategy for PEM fuel cell system
    5.
    发明授权
    Subzero ambient shutdown purge operating strategy for PEM fuel cell system 有权
    PEM燃料电池系统的零度环境关闭清洗操作策略

    公开(公告)号：US09070921B2

    公开(公告)日：2015-06-30

    申请号：US13431703

    申请日：2012-03-27

    申请人： Michael Cartwright ,  Bruce J. Clingerman ,  Daniel I. Harris ,  Aaron Rogahn ,  Derek R. Lebzelter

    发明人： Michael Cartwright ,  Bruce J. Clingerman ,  Daniel I. Harris ,  Aaron Rogahn ,  Derek R. Lebzelter

    IPC分类号： H01M8/06 ,  H01M16/00 ,  H01M8/04

    CPC分类号： H01M8/0662 ,  H01M8/04223 ,  H01M8/04228 ,  H01M8/04253 ,  H01M8/04303 ,  H01M16/006 ,  Y02E60/50

    摘要： A method for purging water from a fuel cell stack at fuel cell system shutdown. The method includes determining a stack water generation request to control the rate of drying of membranes in the stack and determining a cathode catalytic heating water generation request. A maximum charge a battery in the fuel cell system can accept is also determined. An ancillary power request for powering components of the fuel cell system during shutdown is determined. The method allocates how much of the water generation request will be fulfilled by operating the fuel cell stack to charge the battery and to provide the power needed for the ancillary power request, and how much of the water generation request will be fulfilled by cathode catalytic heating that produces water and heat in a cathode side of the fuel cell stack.

    摘要翻译： 一种在燃料电池系统关闭时从燃料电池堆排出水的方法。 该方法包括确定堆积水生成请求以控制堆叠中的膜的干燥速率并确定阴极催化加热水产生请求。 也可以确定燃料电池系统中可以接受的电池的最大充电量。 确定在关闭期间为燃料电池系统的组件供电的辅助功率请求。 该方法通过操作燃料电池堆来对电池进行充电并提供辅助电力需求所需的功率，并通过阴极催化加热达到多少水分产生要求， 其在燃料电池堆的阴极侧产生水和热。

    SHUTDOWN STRATEGY FOR ENHANCED WATER MANAGEMENT
    6.
    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。

    Frame sequence for a cell voltage measurement system with a low probability of natural occurrence
    7.
    发明授权
    Frame sequence for a cell voltage measurement system with a low probability of natural occurrence 有权
    具有自然发生概率低的单元电压测量系统的帧序列

    公开(公告)号：US09017889B2

    公开(公告)日：2015-04-28

    申请号：US13171147

    申请日：2011-06-28

    申请人： David J. Reed ,  Kenneth L. Kaye ,  Derek R. Lebzelter ,  Kevin Sampson

    发明人： David J. Reed ,  Kenneth L. Kaye ,  Derek R. Lebzelter ,  Kevin Sampson

    IPC分类号： H01M8/04 ,  H04Q9/00 ,  G01R19/00 ,  G01R31/36 ,  H01M8/10

    CPC分类号： H01M8/04992 ,  G01R19/00 ,  G01R31/362 ,  H01M8/04552 ,  H01M8/04671 ,  H01M8/04873 ,  H01M2008/1095 ,  H04Q9/00 ,  H04Q2209/845 ,  Y02E60/50

    摘要： A method for providing calibration and synchronization pulses in a pulse width modulation (PWM) signal including cell voltage measurement pulses, where the calibration pulses are four calibration pulses having a pattern of a narrow width high voltage pulse followed by a wide width low voltage pulse followed by a narrow width high voltage pulse followed by a wide width low voltage pulse that has a very low probability of occurring in a practical fuel cell system. The method modulates a combined sequence of the voltage measurement signals and the calibration pulses using an inverted saw tooth wave to provide the PWM signal, where a width of the pulses representing the voltage signals are proportional to a width of the pulses representing the calibration pulses.

    摘要翻译： 一种用于在包括单元电压测量脉冲的脉冲宽度调制（PWM）信号中提供校准和同步脉冲的方法，其中校准脉冲是具有窄宽度高电压脉冲的图案的四个校准脉冲，随后是宽宽度的低电压脉冲 通过窄的高电压脉冲，随后是在实际燃料电池系统中发生的概率非常低的宽宽度低电压脉冲。 该方法使用反锯齿波调制电压测量信号和校准脉冲的组合序列以提供PWM信号，其中表示电压信号的脉冲的宽度与表示校准脉冲的脉冲的宽度成比例。

    FUEL CELL STACK USED AS COOLANT HEATER
    8.
    发明申请
    FUEL CELL STACK USED AS COOLANT HEATER 有权
    燃料电池堆叠用作冷却加热器

    公开(公告)号：US20100035097A1

    公开(公告)日：2010-02-11

    申请号：US12187056

    申请日：2008-08-06

    申请人： Derek R. Lebzelter ,  Balasubramanian Lakshmanan ,  Frederick T. Wagner

    发明人： Derek R. Lebzelter ,  Balasubramanian Lakshmanan ,  Frederick T. Wagner

    IPC分类号： H01M8/00

    CPC分类号： H01M8/04089 ,  H01M8/04268 ,  H01M8/04365 ,  H01M8/04552 ,  H01M8/04731 ,  Y02E60/50

    摘要： A system and method for increasing the temperature of a fuel cell stack quickly, especially at cold stack start-up. The method includes determining whether the fuel cell stack is below a first predetermined temperature threshold, and, if so, starting a cooling fluid flow through the stack and engaging a shorting circuit across the stack to short circuit the stack and cause the stack to operate inefficiently. The method then determines a desired heating rate of the fuel cell stack and calculates a cathode airflow to the fuel cell stack based on the desired heating rate. The method reduces the flow of cathode air to the stack if a minimum cell voltage is below a predetermined minimum cell voltage threshold and disengages the shorting circuit and applies vehicle loads to the stack when the stack temperature reaches a predetermined second temperature threshold.

    摘要翻译： 一种用于快速提高燃料电池堆的温度的系统和方法，特别是在冷堆启动时。 该方法包括确定燃料电池堆是否低于第一预定温度阈值，并且如果是，则启动冷却流体流过堆叠并且跨越堆叠接合短路电路以使堆叠短路并且使得堆栈无效地运行 。 该方法然后确定燃料电池堆的期望加热速率，并基于期望的加热速率计算到燃料电池堆的阴极气流。 如果最小电池电压低于预定的最小电池电压阈值，则该方法减少阴极空气流到堆叠的流量，并且当堆叠温度达到预定的第二温度阈值时，将短路电路解除并将车辆负载施加到堆叠。

    FRAME SEQUENCE FOR A CELL VOLTAGE MEASUREMENT SYSTEM WITH A LOW PROBABILITY OF NATURAL OCCURRENCE
    10.
    发明申请
    FRAME SEQUENCE FOR A CELL VOLTAGE MEASUREMENT SYSTEM WITH A LOW PROBABILITY OF NATURAL OCCURRENCE 有权
    具有低自然现象可能性的电池电压测量系统的帧序列

    公开(公告)号：US20130002232A1

    公开(公告)日：2013-01-03

    申请号：US13171147

    申请日：2011-06-28

    申请人： David J. Reed ,  Kenneth L. Kaye ,  Derek R. Lebzelter ,  Kevin Sampson

    发明人： David J. Reed ,  Kenneth L. Kaye ,  Derek R. Lebzelter ,  Kevin Sampson

    IPC分类号： G01R19/00

    CPC分类号： H01M8/04992 ,  G01R19/00 ,  G01R31/362 ,  H01M8/04552 ,  H01M8/04671 ,  H01M8/04873 ,  H01M2008/1095 ,  H04Q9/00 ,  H04Q2209/845 ,  Y02E60/50

    摘要： A method for providing calibration and synchronization pulses in a pulse width modulation (PWM) signal including cell voltage measurement pulses, where the calibration pulses are four calibration pulses having a pattern of a narrow width high voltage pulse followed by a wide width low voltage pulse followed by a narrow width high voltage pulse followed by a wide width low voltage pulse that has a very low probability of occurring in a practical fuel cell system. The method modulates a combined sequence of the voltage measurement signals and the calibration pulses using an inverted saw tooth wave to provide the PWM signal, where a width of the pulses representing the voltage signals are proportional to a width of the pulses representing the calibration pulses.

    摘要翻译： 一种用于在包括单元电压测量脉冲的脉冲宽度调制（PWM）信号中提供校准和同步脉冲的方法，其中校准脉冲是具有窄宽度高电压脉冲的图案的四个校准脉冲，随后是宽宽度的低电压脉冲 通过窄的高电压脉冲，随后是在实际燃料电池系统中发生的概率非常低的宽宽度低电压脉冲。 该方法使用反锯齿波调制电压测量信号和校准脉冲的组合序列以提供PWM信号，其中表示电压信号的脉冲的宽度与表示校准脉冲的脉冲的宽度成比例。