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    Online method to estimate hydrogen concentration estimation in fuel cell systems at shutdown and startup
    1.
    发明授权
    Online method to estimate hydrogen concentration estimation in fuel cell systems at shutdown and startup 有权
    在关闭和启动时估算燃料电池系统中氢浓度估算的在线方法

    公开(公告)号：US08195407B2

    公开(公告)日：2012-06-05

    申请号：US12721416

    申请日：2010-03-10

    申请人： John P. Salvador ,  Joseph Nicholas Lovria ,  Sriram Ganapathy ,  John C. Fagley

    发明人： John P. Salvador ,  Joseph Nicholas Lovria ,  Sriram Ganapathy ,  John C. Fagley

    IPC分类号： G01N31/00

    CPC分类号： H01M8/04302 ,  H01M8/04223 ,  H01M8/04303

    摘要： A system and method for estimating the amount of hydrogen and/or nitrogen in a fuel cell stack and stack volumes at system start-up and shut-down. The method defines the fuel cell stack and stack volumes as discrete volumes including an anode flow-field and anode plumbing volume, a cathode flow-field volume and a cathode header and plumbing volume. The method estimates the amount of hydrogen and/or nitrogen in the anode flow-field and anode plumbing volume, the cathode flow-field volume and the cathode header and plumbing volume when the fuel cell system is shut down, during a first stage when the hydrogen partial pressure between the anode and cathode is not in equilibrium and during a second stage when the hydrogen partial pressure between the anode and cathode is in equilibrium by considering various flows into and out of the volumes.

    摘要翻译： 一种用于在系统启动和关闭时估计燃料电池堆中的氢和/或氮的量和堆积体积的系统和方法。 该方法将燃料电池堆和堆叠体积定义为离散体积，包括阳极流场和阳极管道体积，阴极流场体积和阴极集管以及管道体积。 该方法估计在燃料电池系统关闭期间阳极流场和阳极管道体积，阴极流场体积和阴极集管中的氢和/或氮的量，在第一阶段期间，当 在阳极和阴极之间的氢分压不是平衡的，而在第二阶段当阳极和阴极之间的氢分压通过考虑流入和流出体积的各种流动而处于平衡状态时。

    ONLINE METHOD TO ESTIMATE HYDROGEN CONCENTRATION ESTIMATION IN FUEL CELL SYSTEMS AT SHUTDOWN AND STARTUP
    2.
    发明申请
    ONLINE METHOD TO ESTIMATE HYDROGEN CONCENTRATION ESTIMATION IN FUEL CELL SYSTEMS AT SHUTDOWN AND STARTUP 有权
    在关闭和启动时估算燃料电池系统中氢浓度估算的在线方法

    公开(公告)号：US20110087441A1

    公开(公告)日：2011-04-14

    申请号：US12721416

    申请日：2010-03-10

    申请人： John P. Salvador ,  Joseph Nicholas Lovria ,  Sriram Ganapathy ,  John C. Fagley

    发明人： John P. Salvador ,  Joseph Nicholas Lovria ,  Sriram Ganapathy ,  John C. Fagley

    IPC分类号： G01N33/22 ,  G06F19/00

    CPC分类号： H01M8/04302 ,  H01M8/04223 ,  H01M8/04303

    摘要： A system and method for estimating the amount of hydrogen and/or nitrogen in a fuel cell stack and stack volumes at system start-up and shut-down. The method defines the fuel cell stack and stack volumes as discrete volumes including an anode flow-field and anode plumbing volume, a cathode flow-field volume and a cathode header and plumbing volume. The method estimates the amount of hydrogen and/or nitrogen in the anode flow-field and anode plumbing volume, the cathode flow-field volume and the cathode header and plumbing volume when the fuel cell system is shut down, during a first stage when the hydrogen partial pressure between the anode and cathode is not in equilibrium and during a second stage when the hydrogen partial pressure between the anode and cathode is in equilibrium by considering various flows into and out of the volumes.

    摘要翻译： 一种用于在系统启动和关闭时估计燃料电池堆中的氢和/或氮的量和堆积体积的系统和方法。 该方法将燃料电池堆和堆叠体积定义为离散体积，包括阳极流场和阳极管道体积，阴极流场体积和阴极集管以及管道体积。 该方法估计在燃料电池系统关闭期间阳极流场和阳极管道体积，阴极流场体积和阴极集管中的氢和/或氮的量，在第一阶段期间，当 在阳极和阴极之间的氢分压不是平衡的，而在第二阶段当阳极和阴极之间的氢分压通过考虑流入和流出体积的各种流动而处于平衡状态时。

    FEEDBACK CONTROL OF H2 INJECTION DURING PARK BASED ON GAS CONCENTRATION MODEL
    3.
    发明申请
    FEEDBACK CONTROL OF H2 INJECTION DURING PARK BASED ON GAS CONCENTRATION MODEL 有权
    基于气体浓度模型的公园期间注入氢气的反馈控制

    公开(公告)号：US20110244348A1

    公开(公告)日：2011-10-06

    申请号：US12754279

    申请日：2010-04-05

    申请人： Jun Cai ,  Joseph Nicholas Lovria ,  Sriram Ganapathy ,  Jaehak Jung ,  John P. Salvador

    发明人： Jun Cai ,  Joseph Nicholas Lovria ,  Sriram Ganapathy ,  Jaehak Jung ,  John P. Salvador

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04992 ,  H01M8/04097 ,  H01M8/04104 ,  H01M8/04201 ,  H01M8/04223 ,  H01M8/04225 ,  H01M8/04228 ,  H01M8/04303 ,  H01M8/04447 ,  H01M8/04753 ,  H01M8/04798 ,  H01M2250/20 ,  Y02T90/32

    摘要： A method for determining when to inject hydrogen gas into the anode side of a fuel cell stack associated with a fuel cell vehicle when the vehicle is off. The method includes estimating the concentration of hydrogen gas in the anode side of the fuel cell stack using a gas concentration model and determining if the estimated concentration of hydrogen gas is below a first predetermined threshold. If the estimated hydrogen gas is less than the threshold, then hydrogen gas is injected into the anode side from a hydrogen source. While the hydrogen gas is being injected, the method compares the estimated concentration of the hydrogen gas in the anode side to a desired concentration, and generates an error signal there between. If the error signal is greater than a second predetermined threshold, the algorithm continues to inject the hydrogen into the anode side of the fuel cell stack.

    摘要翻译： 一种用于在车辆关闭时确定何时将氢气注入与燃料电池车辆相关联的燃料电池堆的阳极侧的方法。 该方法包括使用气体浓度模型估计燃料电池堆的阳极侧的氢气浓度，并且确定氢气的估计浓度是否低于第一预定阈值。 如果估计氢气低于阈值，则氢气从氢源注入阳极侧。 在注入氢气的同时，该方法将阳极侧的氢气的估计浓度与期望浓度进行比较，并在其间产生误差信号。 如果误差信号大于第二预定阈值，则算法继续将氢气注入燃料电池堆的阳极侧。

    Feedback control of H2 injection during park based on gas concentration model
    4.
    发明授权
    Feedback control of H2 injection during park based on gas concentration model 有权
    基于气体浓度模型的公园H2注入反馈控制

    公开(公告)号：US08722263B2

    公开(公告)日：2014-05-13

    申请号：US12754279

    申请日：2010-04-05

    申请人： Jun Cai ,  Joseph Nicholas Lovria ,  Sriram Ganapathy ,  Jaehak Jung ,  John P. Salvador

    发明人： Jun Cai ,  Joseph Nicholas Lovria ,  Sriram Ganapathy ,  Jaehak Jung ,  John P. Salvador

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04992 ,  H01M8/04097 ,  H01M8/04104 ,  H01M8/04201 ,  H01M8/04223 ,  H01M8/04225 ,  H01M8/04228 ,  H01M8/04303 ,  H01M8/04447 ,  H01M8/04753 ,  H01M8/04798 ,  H01M2250/20 ,  Y02T90/32

    摘要： A method for determining when to inject hydrogen gas into the anode side of a fuel cell stack associated with a fuel cell vehicle when the vehicle is off. The method includes estimating the concentration of hydrogen gas in the anode side of the fuel cell stack using a gas concentration model and determining if the estimated concentration of hydrogen gas is below a first predetermined threshold. If the estimated hydrogen gas is less than the threshold, then hydrogen gas is injected into the anode side from a hydrogen source. While the hydrogen gas is being injected, the method compares the estimated concentration of the hydrogen gas in the anode side to a desired concentration, and generates an error signal there between. If the error signal is greater than a second predetermined threshold, the algorithm continues to inject the hydrogen into the anode side of the fuel cell stack.

    摘要翻译： 一种用于在车辆关闭时确定何时将氢气注入与燃料电池车辆相关联的燃料电池堆的阳极侧的方法。 该方法包括使用气体浓度模型估计燃料电池堆的阳极侧的氢气浓度，并且确定氢气的估计浓度是否低于第一预定阈值。 如果估计氢气低于阈值，则氢气从氢源注入阳极侧。 在注入氢气的同时，该方法将阳极侧的氢气的估计浓度与期望浓度进行比较，并在其间产生误差信号。 如果误差信号大于第二预定阈值，则算法继续将氢气注入燃料电池堆的阳极侧。

    Detection of small anode leaks in fuel cell systems
    5.
    发明授权
    Detection of small anode leaks in fuel cell systems 有权
    检测燃料电池系统中的小阳极泄漏

    公开(公告)号：US08524405B2

    公开(公告)日：2013-09-03

    申请号：US12784060

    申请日：2010-05-20

    申请人： John P. Salvador ,  Joseph Nicholas Lovria

    发明人： John P. Salvador ,  Joseph Nicholas Lovria

    IPC分类号： H01M8/04

    CPC分类号： G01M3/26

    摘要： A system and method for detecting small hydrogen leaks in an anode of a fuel cell system. The method includes determining that a shut-down sequence has begun, and if so, deplete the cathode side of a fuel cell stack of oxygen. The method then increases the pressure of the anode side of the fuel cell stack to a predetermined set-point, and monitors the pressure decay of the anode side of the stack. The method compares the rate of pressure decay to an expected pressure decay rate, and if the measured pressure decay rate exceeds the expected pressure decay rate by a certain threshold, determines that a potential leak exists.

    摘要翻译： 一种用于检测燃料电池系统的阳极中的小氢泄漏的系统和方法。 该方法包括确定关闭序列已经开始，如果是这样，则耗尽燃料电池堆的氧气的阴极侧。 然后，该方法将燃料电池堆的阳极侧的压力增加到预定的设定点，并且监视堆叠的阳极侧的压力衰减。 该方法将压力衰减速率与预期的压力衰减速率进行比较，如果测量的压力衰减速率超过预期的压力衰减速率一定阈值，则确定存在潜在的泄漏。

    DETECTION OF SMALL ANODE LEAKS IN FUEL CELL SYSTEMS
    8.
    发明申请
    DETECTION OF SMALL ANODE LEAKS IN FUEL CELL SYSTEMS 有权
    检测燃料电池系统中的小阳极泄漏

    公开(公告)号：US20110287327A1

    公开(公告)日：2011-11-24

    申请号：US12784060

    申请日：2010-05-20

    申请人： John P. Salvador ,  Joseph Nicholas Lovria

    发明人： John P. Salvador ,  Joseph Nicholas Lovria

    IPC分类号： H01M8/04 ,  G01M3/04

    CPC分类号： G01M3/26

    摘要： A system and method for detecting small hydrogen leaks in an anode of a fuel cell system. The method includes determining that a shut-down sequence has begun, and if so, deplete the cathode side of a fuel cell stack of oxygen. The method then increases the pressure of the anode side of the fuel cell stack to a predetermined set-point, and monitors the pressure decay of the anode side of the stack. The method compares the rate of pressure decay to an expected pressure decay rate, and if the measured pressure decay rate exceeds the expected pressure decay rate by a certain threshold, determines that a potential leak exists.

    摘要翻译： 一种用于检测燃料电池系统的阳极中的小氢泄漏的系统和方法。 该方法包括确定关闭序列已经开始，如果是这样，则耗尽燃料电池堆的氧气的阴极侧。 然后，该方法将燃料电池堆的阳极侧的压力增加到预定的设定点，并且监视堆叠的阳极侧的压力衰减。 该方法将压力衰减速率与预期的压力衰减速率进行比较，如果测量的压力衰减速率超过预期的压力衰减速率一定阈值，则确定存在潜在的泄漏。

    Optimized cathode fill strategy for fuel cell
    10.
    发明授权
    Optimized cathode fill strategy for fuel cell 有权
    燃料电池优化阴极填充策略

    公开(公告)号：US08697303B2

    公开(公告)日：2014-04-15

    申请号：US12693251

    申请日：2010-01-25

    申请人： Daniel I. Harris ,  Joseph Nicholas Lovria ,  Matthew C. Kirklin ,  Gary M. Robb

    发明人： Daniel I. Harris ,  Joseph Nicholas Lovria ,  Matthew C. Kirklin ,  Gary M. Robb

    IPC分类号： H01M8/06 ,  H01M8/04

    CPC分类号： H01M8/04455 ,  H01M8/04798 ,  H01M2250/20 ,  Y02T90/32

    摘要： A method for controlling cathode air flow at system start-up by controlling a stack by-pass valve. The method includes determining a concentration of hydrogen in a cathode side of the fuel cell stack. The method also includes determining a volumetric flow rate through a cathode compressor, determining a volumetric flow rate through the cathode side and determining a fraction of volumetric flow rate through the cathode side to the total flow through the compressor. The method determines a modeled hydrogen outlet concentration from the fuel cell stack based on the volumetric flow rate through the compressor, the fraction of volumetric flow rate through the compressor to the total flow through the compressor and the concentration of hydrogen in the cathode side. The method uses a desired fraction of volumetric flow rate through the cathode side and the total flow through the compressor to determine the position of the by-pass valve.

    摘要翻译： 一种通过控制堆叠旁通阀来控制系统启动时的阴极气流的方法。 该方法包括确定燃料电池堆的阴极侧的氢浓度。 该方法还包括确定通过阴极压缩机的体积流量，确定通过阴极侧的体积流量，并确定通过阴极侧的体积流量与通过压缩机的总流量的比例。 该方法基于通过压缩机的体积流量，通过压缩机的体积流量与通过压缩机的总流量的比例以及阴极侧的氢浓度，确定来自燃料电池堆的模型氢出口浓度。 该方法使用通过阴极侧的所需部分体积流量和通过压缩机的总流量来确定旁通阀的位置。