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    Fuel cell operation to minimize RH cycles to improve durability
    2.
    发明申请
    Fuel cell operation to minimize RH cycles to improve durability 有权
    燃料电池操作以最小化RH周期以提高耐久性

    公开(公告)号：US20070265802A1

    公开(公告)日：2007-11-15

    申请号：US11434385

    申请日：2006-05-15

    申请人： William Pettit ,  John Fagley ,  John Salvador ,  Steven Goebel

    发明人： William Pettit ,  John Fagley ,  John Salvador ,  Steven Goebel

    IPC分类号： G06F19/00 ,  G06F17/40

    CPC分类号： H01M8/04522 ,  H01M8/04126 ,  H01M8/0432 ,  H01M8/04843 ,  H01M2008/1095

    摘要： A fuel cell system that includes an over-arching algorithm for providing a strategy that reduces relative humidity cycling of the cathode outlet gas between wet and dry operation to extend the useful life of the membrane. The algorithm receives sensor signals indicative of operating parameters of the fuel cell system. The algorithm maintains a cathode exhaust gas relative humidity in a wet operating mode if the operating parameters of the fuel cell system are able to sustain the cathode gas relative humidity above a first predetermined value, and maintains the cathode exhaust gas relative humidity in a dry operating mode if the operating parameters of the fuel cell system are able to sustain the cathode gas relative humidity below a second predetermined value.

    摘要翻译： 一种燃料电池系统，其包括用于提供在湿和干运行之间减少阴极出口气体的相对湿度循环以延长膜的使用寿命的策略的叠加算法。 该算法接收指示燃料电池系统的操作参数的传感器信号。 如果燃料电池系统的操作参数能够将阴极气体的相对湿度维持在高于第一预定值的情况下，该算法在湿式操作模式中保持阴极排气相对湿度，并且将阴极废气相对湿度保持在干燥操作 如果燃料电池系统的操作参数能够将阴极气体相对湿度维持在低于第二预定值的情况下。

    Relative humidity control for a fuel cell
    4.
    发明申请
    Relative humidity control for a fuel cell 有权
    燃料电池的相对湿度控制

    公开(公告)号：US20060263654A1

    公开(公告)日：2006-11-23

    申请号：US11130825

    申请日：2005-05-17

    申请人： Steven Goebel ,  William Pettit ,  John Fagley ,  Lee Whitehead

    发明人： Steven Goebel ,  William Pettit ,  John Fagley ,  Lee Whitehead

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04119 ,  H01M8/04253 ,  H01M2008/1095

    摘要： A model uses various operating characteristics of a fuel cell to predict the relative humidity profile that is occurring within the fuel cell as a function of the reaction progress. The model is used to predict the relative humidity profile that will occur in response to changes to one or more of the operating characteristics of the fuel cell. A high frequency resistance of the fuel cell can also be used as a measure that is indicative of the humidity within the fuel cell. The model and/or the high frequency resistance can be used in a closed-loop feedback system to control the operation of the fuel cell to maintain the humidification of the MEA and fuel cells within a desired range to achieve a desired fuel cell performance.

    摘要翻译： 模型使用燃料电池的各种操作特性来预测在燃料电池内发生的相对湿度分布作为反应进程的函数。 该模型用于预测响应于燃料电池的一个或多个操作特性的变化而发生的相对湿度分布。 燃料电池的高频电阻也可以用作指示燃料电池内的湿度的措施。 该模型和/或高频阻抗可以用在闭环反馈系统中以控制燃料电池的操作，以将MEA和燃料电池的加湿保持在期望的范围内，以实现期望的燃料电池性能。

    Fuel cell shutdown and startup purge using a stoichiometric staged combustor
    5.
    发明申请
    Fuel cell shutdown and startup purge using a stoichiometric staged combustor 有权
    使用化学计量分级燃烧器进行燃料电池关闭和启动清洗

    公开(公告)号：US20050136304A1

    公开(公告)日：2005-06-23

    申请号：US10739463

    申请日：2003-12-18

    申请人： William Pettit ,  Steven Goebel

    发明人： William Pettit ,  Steven Goebel

    IPC分类号： H01M20060101 ,  H01M8/04

    CPC分类号： H01M8/04231 ,  H01M8/04022 ,  H01M2008/1095 ,  H01M2250/20 ,  Y02T90/32

    摘要： A device and method for operating a fuel cell system. The device includes a combustor that is configured to combine reactants used in the fuel cell in such a way as to produce an inert fluid used to inert electrodes within the fuel cell. The device also includes componentry to permit purging of the electrodes subsequent to their inerting. In one form, the combustor is of such thermal mass that heat generated by combustion of the reactants is substantially absorbed by the combustor such that recourse to supplemental cooling apparatus is not required. The combustor may also be configured to promote staged mixing and subsequent reaction of the fuel cell reactants to further limit excess heat generated by the reaction. While the device of the present invention is usable during any period of system operation, it is especially valuable for operational conditions associated with starting up and shutting down a fuel cell system to inhibit the formation of high voltage potentials that could otherwise damage fuel cell catalysts or catalyst supports.

    摘要翻译： 一种用于操作燃料电池系统的装置和方法。 该装置包括燃烧器，该燃烧器被配置为结合在燃料电池中使用的反应物，以便产生用于燃料电池内的惰性电极的惰性流体。 该装置还包括组件，以允许电极在其惰化之后清洗。 在一种形式中，燃烧器具有这样的热质量，使得由燃烧器燃烧产生的热量被燃烧器基本吸收，从而不需要追求补充冷却装置。 燃烧器还可以被配置为促进燃料电池反应物的分级混合和随后的反应，以进一步限制由反应产生的多余的热量。 虽然本发明的装置在系统操作的任何时期都是可用的，但是对于与启动和关闭燃料电池系统相关联的操作条件特别有价值，所述操作条件可以抑制形成可能损害燃料电池催化剂的高电压电位， 催化剂载体。

    Method and apparatus for hydrogen detection and dilution
    7.
    发明申请
    Method and apparatus for hydrogen detection and dilution 有权
    用于氢气检测和稀释的方法和装置

    公开(公告)号：US20050058861A1

    公开(公告)日：2005-03-17

    申请号：US10666008

    申请日：2003-09-17

    申请人： William Pettit ,  Steven Goebel ,  Frederick Wagner

    发明人： William Pettit ,  Steven Goebel ,  Frederick Wagner

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04089 ,  H01M8/04014

    摘要： The present invention provides for a method and apparatus for hydrogen detection and dilution. The present invention uses an enclosure within which a variety of components of a fuel cell system are located and a ventilation stream to vent the enclosure which is induced by operation of a compressor that also is operable to supply the oxygen to the fuel cell system. The ventilation stream is directed through an outlet in the enclosure that contains a hydrogen sensor that is operable to both detect the presence of hydrogen and to consume hydrogen within the ventilation stream prior to being exhausted from the enclosure. The ventilation stream, alternatively, can be induced by operation of a fan driven by a motor which operates independently of the operation of the oxidant delivery system.

    摘要翻译： 本发明提供了用于氢气检测和稀释的方法和装置。 本发明使用燃料电池系统的各种部件所在的外壳，以及通过压缩机操作而引起的外壳的通气流，所述压缩机也可操作以将氧气供应到燃料电池系统。 通风流被引导通过外壳中的出口，其包含氢传感器，其可操作以在从外壳排出之前检测氢的存在并消耗通气流内的氢。 可选地，通风流可以通过独立于氧化剂输送系统的操作而操作由马达驱动的风扇来引起。

    Direct water vaporization for fuel processor startup and transients
    10.
    发明申请
    Direct water vaporization for fuel processor startup and transients 有权

    公开(公告)号：US20060121324A1

    公开(公告)日：2006-06-08

    申请号：US11335003

    申请日：2006-01-19

    申请人： Steven Goebel

    发明人： Steven Goebel

    IPC分类号： H01M8/06 ,  C10J3/46

    CPC分类号： H01M8/0618 ,  B01B1/005 ,  C01B3/382 ,  C01B3/48 ,  C01B2203/0244 ,  C01B2203/0283 ,  C01B2203/044 ,  C01B2203/047 ,  C01B2203/066 ,  C01B2203/0811 ,  C01B2203/0822 ,  C01B2203/0827 ,  C01B2203/0844 ,  C01B2203/1288 ,  C01B2203/142 ,  C01B2203/82 ,  H01M8/0668 ,  Y02P20/128

    摘要： A fuel cell system including a fuel reforming processor having a catalyst therein constructed and arranged to produce a reformate stream including hydrogen and carbon monoxide, a water gas shift reactor downstream of the fuel reforming processor and wherein the water gas shift reactor includes a catalyst therein constructed and arranged to reduce the amount of carbon monoxide in the reformate stream, a preferential oxidation reactor downstream of the water gas shift reactor and wherein the preferential oxidation reactor includes a catalyst therein constructed and arranged to preferentially oxidize carbon monoxide into carbon dioxide and to produce a hydrogen-rich stream, and a fuel cell stack downstream of the preferential oxidation reactor constructed and arranged to produce electricity from the hydrogen-rich stream, a first direct water vaporizing combustor constructed and arranged to combust fuel producing a high-temperature fuel combustion byproducts exhaust and to produce steam from water sprayed into the combustion byproduct exhaust and wherein the first direct water vaporizing combustor is plumbed to the fuel reforming reactor to charge steam therein, and a second direct water vaporizing combustor constructed and arranged to combust fuel to produce a high-temperature fuel combustion byproduct exhaust and to produce steam from water sprayed into the fuel combustion byproduct exhaust and wherein the second direct water vaporizing combustor is plumbed to the water gas shift reactor to charge steam therein.