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公开(公告)号：US07968240B2
公开(公告)日：2011-06-28
申请号：US12014272
申请日：2008-01-15
CPC分类号： H01M8/04238 , H01M8/04231 , H01M8/04559 , H01M8/0488 , H01M8/0491
摘要： A fuel cell system is provided that includes a fuel cell stack with a plurality of fuel cells and a power converter in electrical communication with the fuel cell stack. The power converter is configured to selectively regulate a power of the fuel cell stack and short circuit the fuel cell stack, as desired. A method for starting the fuel cell stack is also described, including the steps of causing a short circuit of the fuel cell stack by placing the power converter in a short circuit mode; introducing a hydrogen to the anodes of the fuel cell stack to displace a quantity of air on the anodes; and placing the power converter in a power regulation mode. A degradation of the fuel cell stack during start-up is thereby militated against.
摘要翻译： 提供一种燃料电池系统，其包括具有多个燃料电池的燃料电池堆和与燃料电池堆电连通的电力转换器。 功率转换器被配置为根据需要选择性地调节燃料电池堆的功率并使燃料电池堆短路。 还描述了用于启动燃料电池堆的方法，包括通过将功率转换器置于短路模式来引起燃料电池堆的短路的步骤; 向燃料电池堆的阳极引入氢以置换阳极上的空气量; 并将功率转换器置于功率调节模式。 因此，在启动期间燃料电池堆的劣化因此受到阻碍。
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公开(公告)号：US20100003546A1
公开(公告)日：2010-01-07
申请号：US12014272
申请日：2008-01-15
IPC分类号： H01M8/04
CPC分类号： H01M8/04238 , H01M8/04231 , H01M8/04559 , H01M8/0488 , H01M8/0491
摘要： A fuel cell system is provided that includes a fuel cell stack with a plurality of fuel cells and a power converter in electrical communication with the fuel cell stack. The power converter is configured to selectively regulate a power of the fuel cell stack and short circuit the fuel cell stack, as desired. A method for starting the fuel cell stack is also described including the steps of causing a short circuit of the fuel cell stack by placing the power converter in a short circuit mode; introducing a hydrogen to the anodes of the fuel cell stack to displace a quantity of air on the anodes; and placing the power converter in a power regulation mode. A degradation of the fuel cell stack during start-up is thereby militated against.
摘要翻译： 提供一种燃料电池系统，其包括具有多个燃料电池的燃料电池堆和与燃料电池堆电连通的电力转换器。 功率转换器被配置为根据需要选择性地调节燃料电池堆的功率并使燃料电池堆短路。 还描述了用于起动燃料电池堆的方法，包括通过将功率转换器置于短路模式来引起燃料电池堆的短路的步骤; 向燃料电池堆的阳极引入氢以置换阳极上的空气量; 并将功率转换器置于功率调节模式。 因此，在启动期间燃料电池堆的劣化因此受到阻碍。
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3.发明授权Method and apparatus for measurement of fuel cell high frequency resistance in the presence of large undesirable signals 有权在存在大量不合需要的信号的情况下测量燃料电池高频电阻的方法和装置公开(公告)号：US07421356B2
公开(公告)日：2008-09-02
申请号：US11536723
申请日：2006-09-29
CPC分类号： G01R31/3662
摘要： A method and apparatus for a high frequency resistance measurement instrument with a reasonable dynamic range, which militates against saturation in the presence of one or more large undesirable signals, the high frequency measurement instrument capable of employing multiple alternating currents of differing frequencies to maintain measurement capability despite signal chain saturation in the presence of a large undesirable signal.
摘要翻译： 一种用于具有合理动态范围的高频电阻测量仪器的方法和装置，其在存在一个或多个大的不期望的信号的情况下不利于饱和，该高频测量仪器能够采用不同频率的多个交流电流来维持测量能力 尽管在存在大的不期望的信号的情况下信号链饱和。
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4.发明申请公开(公告)号：US20080091367A1
公开(公告)日：2008-04-17
申请号：US11536723
申请日：2006-09-29
IPC分类号： G01R23/16
CPC分类号： G01R31/3662
摘要： A method and apparatus for a high frequency resistance measurement instrument with a reasonable dynamic range, which militates against saturation in the presence of one or more large undesirable signals, the high frequency measurement instrument capable of employing multiple alternating currents of differing frequencies to maintain measurement capability despite signal chain saturation in the presence of a large undesirable signal.
摘要翻译： 一种用于具有合理动态范围的高频电阻测量仪器的方法和装置，其在存在一个或多个大的不期望的信号的情况下不利于饱和，该高频测量仪器能够采用不同频率的多个交流电流来维持测量能力 尽管在存在大的不期望的信号的情况下信号链饱和。
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公开(公告)号：US08828616B2
公开(公告)日：2014-09-09
申请号：US12262785
申请日：2008-10-31
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。
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公开(公告)号：US20100112382A1
公开(公告)日：2010-05-06
申请号：US12262785
申请日：2008-10-31
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。
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公开(公告)号：US07972749B2
公开(公告)日：2011-07-05
申请号：US10875464
申请日：2004-06-24
CPC分类号： H01M8/0488 , B60L11/1883 , H01M8/241 , H01M2250/20 , H02M7/483 , Y02T90/32 , Y02T90/34
摘要： A fuel cell system that includes a fuel cell stack providing high voltage power. A tap is electrically coupled to the positive end of the stack to provide a positive voltage output terminal of the fuel cell stack, and a tap is electrically coupled to the negative end of the stack to provide a negative output terminal of the fuel cell stack. A low voltage tap is electrically coupled to one or more intermediate bipolar plates of the stack to provide low voltage power. Several intermediate taps can be electrically coupled to the bipolar plates, where a center intermediate tap is designated a reference potential tap. A switching network switches the several voltage potentials to provide an AC signal.
摘要翻译： 一种燃料电池系统，其包括提供高电压功率的燃料电池堆。 抽头电耦合到堆叠的正端以提供燃料电池堆的正电压输出端子，并且抽头电耦合到堆叠的负端以提供燃料电池堆的负输出端子。 低压抽头电耦合到堆叠的一个或多个中间双极板以提供低电压功率。 几个中间抽头可以电耦合到双极板，其中中间中间抽头被指定为参考电位抽头。 交换网络切换几个电压电位以提供AC信号。
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公开(公告)号：US07883809B2
公开(公告)日：2011-02-08
申请号：US11196052
申请日：2005-08-03
申请人： Clark G. Hochgraf
发明人： Clark G. Hochgraf
IPC分类号： H01M8/04
CPC分类号： H01M8/04723 , B60L11/1885 , B60L11/1892 , B60L11/1894 , H01M8/04089 , H01M8/04949 , H01M2250/20 , Y02T90/32 , Y02T90/34
摘要： A technique for heating a fuel cell stack at stack start-up that includes using the vehicle motor drive system to generate waste heat independent from providing traction. Particularly, at fuel cell stack start-up, the electric traction inverter associated with the traction motor that drives the vehicle is controlled so that command signals provided by an inverter to a traction motor do not provide motor torque, but dissipates power into the motor windings and/or motor structure as waste heat. Thus, the output power generated by the fuel cell stack can be made high enough to quickly heat the fuel cell stack through inefficiencies in the stack operation, without providing driving torque. Additionally, the electric traction inverter can be operated so that waste heat is generated within the semiconductor power switches in the inverter.
摘要翻译： 一种用于在堆垛启动时加热燃料电池堆的技术，其包括使用车辆电动机驱动系统以独立于提供牵引力产生废热。 特别地，在燃料电池堆启动时，控制与驱动车辆的牵引电动机相关联的电力牵引逆变器，使得由逆变器提供给牵引电动机的指令信号不提供电动机转矩，而是向电动机绕组 和/或马达结构作为废热。 因此，燃料电池堆产生的输出功率可以被制成足够高的，以便在不提供驱动转矩的情况下通过堆栈操作中的低效率来快速加热燃料电池堆。 此外，电动牵引逆变器可以工作，从而在逆变器的半导体功率开关内产生废热。
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公开(公告)号：US20080311441A1
公开(公告)日：2008-12-18
申请号：US11762875
申请日：2007-06-14
CPC分类号： H01M8/04097 , B60L50/72 , H01M8/04111 , Y02T90/34
摘要： A system for providing fuel recirculation in a fuel cell is disclosed, wherein the system uses a cathode exhaust flow to energize a fuel recirculation pump that facilitates the fuel recirculation from an anode exhaust passage to an anode supply passage.
摘要翻译： 公开了一种用于在燃料电池中提供燃料再循环的系统，其中该系统使用阴极排气流来激励燃料再循环泵，该燃料再循环泵便于从阳极排气通道到阳极供应通道的燃料再循环。
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