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    • 42. 发明申请
    • Fuel Cell Stack with Improved End Cell Performance
    • 燃料电池堆,改善端电池性能
    • US20080299418A1
    • 2008-12-04
    • US11757843
    • 2007-06-04
    • Yeh-Hung LaiPinkhas A. RapaportPo-Ya Abel ChuangWenbin Gu
    • Yeh-Hung LaiPinkhas A. RapaportPo-Ya Abel ChuangWenbin Gu
    • H01M8/00
    • H01M8/04201H01M8/023
    • 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.
    • 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。
    • 43. 发明申请
    • SOFT START FUEL CELL CONTROL STRATEGY
    • 软启动燃料电池控制策略
    • US20080236930A1
    • 2008-10-02
    • US11695270
    • 2007-04-02
    • Manish SinhaYeh-Hung LaiJohn C. Fagley
    • Manish SinhaYeh-Hung LaiJohn C. Fagley
    • H01M8/04B62D21/00
    • H01M8/04302H01M8/04007H01M8/04119H01M8/04223H01M8/04225H01M8/04268H01M8/04291H01M2008/1095H01M2250/20Y02T90/32
    • A method of operating an electrochemical conversion assembly is provided. According to the method, an assembly warm-up operation is executed by increasing the temperature TSTACK of the membrane electrode assembly. Next, stoichiometry-based control of the relative humidity (RH) of one of the reactant flowfields is initiated when the temperature TSTACK exceeds a threshold temperature T0. The stoichiometry-based RH control comprises a reduction in the relative humidity from a value RHWET exceeding 100% relative humidity to a value RHDRY less than 100% relative humidity. The relative humidity value RHDRY is sufficiently low to permit reduction of an initial membrane hydration λWET in the membrane electrode assembly. The reduction in the relative humidity to RHDRY is achieved by controlling the stoichiometry of the reactant flowfield and the temperature of the membrane electrode assembly such that the reduction to RHDRY decreases substantially continuously, relative to portions of the RH profile of the reactant flowfield prior to initiation of the stoichiometry-based control. The cell transitions from the stoichiometry-based RH control to generally elevated-temperature, temperature-based RH control when membrane hydration in the membrane electrode assembly falls below a target membrane hydration value λDRY. Additional methods and corresponding systems are contemplated.
    • 提供了一种操作电化学转化组件的方法。 根据该方法,通过增加膜电极组件的温度T< STACK>来执行组装预热操作。 接下来,当温度TststACK 超过阈值温度T 0 0时,开始基于对反应物流场之一的相对湿度(RH)的基于化学计量的控制。 基于化学计量的RH控制包括相对湿度从超过100%相对湿度的RH RH值降低到低于100%相对湿度的RH RH值。 相对湿度值RH 足够低以允许减少膜电极组件中的初始膜水合作用。 通过控制反应物流场的化学计量和膜电极组件的温度来实现相对湿度相对湿度的降低,使得RH RH的降低显着降低 在开始基于化学计量的控制之前相对于反应物流场的RH分布的部分连续地进行。 当膜电极组件中的膜水合降低到目标膜水合值λDRY 时,细胞从基于化学计量的RH控制转变为通常高温,基于温度的RH控制。 考虑附加的方法和相应的系统。
    • 45. 发明申请
    • Method Of Operating A Fuel Cell Stack By Monitoring Membrane Hydration
    • 通过监测膜水化操作燃料电池堆的方法
    • US20080038594A1
    • 2008-02-14
    • US11464226
    • 2006-08-14
    • Yeh-Hung LaiPinkhas A. RapaportJohn C. Fagley
    • Yeh-Hung LaiPinkhas A. RapaportJohn C. Fagley
    • H01M8/04H01M8/24H01M8/10
    • H01M8/04126H01M8/04313H01M8/04529H01M8/0485H01M8/04992H01M8/248H01M2008/1095
    • 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.
    • 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。
    • 46. 发明申请
    • Electrochemical fuel cell elements having improved compression over channels
    • 具有改善的通道压缩的电化学燃料电池元件
    • US20060046125A1
    • 2006-03-02
    • US10926178
    • 2004-08-25
    • Yeh-Hung Lai
    • Yeh-Hung Lai
    • H01M2/02H01M2/14
    • H01M8/0247H01M8/0254H01M8/026H01M8/0263H01M8/0267H01M2008/1095
    • An electrically conductive element and a related assembly are provided for use in an electrochemical cell. The electrically conductive separator plate has an upper boundary and a lower boundary. The upper boundary has at least one land formed therein, where the land has a surface defining a first plane and the lower boundary defines a second plane. The first plane extends towards said second plane, so as to intersect with said second plane at an angle greater than zero. An assembly further comprises a compliant layer which substantially conforms to the angled land surfaces, thereby enhancing contact pressure between and across a plurality of components in the compliant layer. A method of assembling such a separator assembly in a fuel cell is also provided.
    • 提供导电元件和相关组件用于电化学电池。 导电隔板具有上边界和下边界。 上边界具有形成在其中的至少一个平台,其中平台具有限定第一平面的表面,下边界限定第二平面。 第一平面朝向所述第二平面延伸,以便以大于零的角度与所述第二平面相交。 组件还包括基本上符合成角度的陆面表面的柔性层,从而增强柔顺层中的多个部件之间和跨过顺应层中的多个部件之间的接触压力。 还提供了一种在燃料电池中组装这种分离器组件的方法。
    • 48. 发明授权
    • Electrochemical fuel cell elements having improved compression over channels
    • 具有改善的通道压缩的电化学燃料电池元件
    • US07687183B2
    • 2010-03-30
    • US10926178
    • 2004-08-25
    • Yeh-Hung Lai
    • Yeh-Hung Lai
    • H01M8/02H01M2/14
    • H01M8/0247H01M8/0254H01M8/026H01M8/0263H01M8/0267H01M2008/1095
    • An electrically conductive element and a related assembly are provided for use in an electrochemical cell. The electrically conductive separator plate has an upper boundary and a lower boundary. The upper boundary has at least one land formed therein, where the land has a surface defining a first plane and the lower boundary defines a second plane. The first plane extends towards said second plane, so as to intersect with said second plane at an angle greater than zero. An assembly further comprises a compliant layer which substantially conforms to the angled land surfaces, thereby enhancing contact pressure between and across a plurality of components in the compliant layer. A method of assembling such a separator assembly in a fuel cell is also provided.
    • 提供导电元件和相关组件用于电化学电池。 导电隔板具有上边界和下边界。 上边界具有形成在其中的至少一个平台,其中平台具有限定第一平面的表面,下边界限定第二平面。 第一平面朝向所述第二平面延伸,以便以大于零的角度与所述第二平面相交。 组件还包括基本上符合成角度的陆面表面的柔性层,从而增强柔顺层中的多个部件之间和跨过顺应层中的多个部件之间的接触压力。 还提供了一种在燃料电池中组装这种分离器组件的方法。
    • 50. 发明申请
    • Flexible bipolar plate
    • 柔性双极板
    • US20060046130A1
    • 2006-03-02
    • US10925753
    • 2004-08-25
    • Yeh-Hung Lai
    • Yeh-Hung Lai
    • H01M8/02H01M4/94
    • H01M8/241H01M8/0228H01M8/0254H01M8/0265H01M8/0267H01M8/0271H01M8/2483H01M2008/1095
    • The present invention provides for a construction for a bipolar plate for a fuel cell stack that enables the bipolar plate to be a more compliant member in the fuel cell stack. The bipolar plate can be configured to provide varying levels of compliance, as demanded by the design of the fuel cell stack. The bipolar plate can be more compliant than the diffusion media members and the active elements used to form the individual fuel cells. The compliant nature of the individual bipolar plates enables localized dimensional changes that occur within the fuel cell stack to be compensated by a localized deformation of the portions of the bipolar plate within that region. The bipolar plate has an internal coolant flow field where some opposing pairs of lands are spaced apart with a gap therebetween while other opposing pairs of lands are in contact with one another.
    • 本发明提供了一种用于燃料电池堆的双极板的结构,其使得双极板能够在燃料电池堆中成为更顺从的构件。 双极板可以被配置为提供不同程度的顺应性,如燃料电池堆的设计所要求的。 双极板可以比用于形成单个燃料电池的扩散介质构件和活性元件更柔顺。 各个双极板的顺应性使得在燃料电池堆内发生的局部尺寸变化能够被该区域内的双极板的部分的局部变形所补偿。 双极板具有内部冷却剂流动场,其中一些相对的焊盘对间隔开,而其它相对的焊盘对彼此接触。