Hydrogen passivation shut down system for a fuel cell power plant
    1.
    发明授权
    Hydrogen passivation shut down system for a fuel cell power plant 有权
    用于燃料电池发电厂的氢钝化关闭系统

    公开(公告)号:US08142950B2

    公开(公告)日:2012-03-27

    申请号:US12387515

    申请日:2009-05-04

    IPC分类号: H01M2/38 H01M8/04

    摘要: The invention is a hydrogen passivation shut down system for a fuel cell power plant (10, 200). During shut down of the plant (10, 200), hydrogen fuel is permitted to transfer between an anode flow path (24, 24′) and a cathode flow path (38, 38′). A controlled-oxidant flow device (209) near an oxygen source (58′) permits a minimal amount of atmospheric oxygen to enter the power plant (200) during shut down to equalize pressure between ambient atmosphere and the flow paths (24′, 28′) and to keep limited atmospheric oxygen entering the power plant (200) through the device (209) as far as possible from fuel cell flow fields (28′, 42′). A non-leaking hydrogen inlet valve (202), a non-leaking cathode exhaust valve (208), and a combined oxidant and fuel exhaust line (206) also minimize penetration of oxygen into the shut down power plant (200).

    摘要翻译: 本发明是用于燃料电池发电厂(10,200)的氢钝化关闭系统。 在工厂(10,200)关闭期间,允许氢燃料在阳极流动路径(24,24')和阴极流动路径(38,38')之间传递。 在氧源(58')附近的受控氧化剂流动装置(209)允许最少量的大气氧在关闭期间进入发电厂(200),以使环境大气和流动路径(24',28)之间的压力相等 ')并且尽可能远离燃料电池流场(28',42'),通过装置(209)将有限的大气氧气进入发电厂(200)。 不泄漏的氢气入口阀(202),不泄漏的阴极排气阀(208)和组合的氧化剂和燃料排放管线(206)还使氧气进入关闭发电厂(200)的渗透最小化。

    FUEL CELL FOR MOISTURE MANAGEMENT AT GAS INLETS
    2.
    发明申请
    FUEL CELL FOR MOISTURE MANAGEMENT AT GAS INLETS 审中-公开
    燃气输入口水分管理燃油电池

    公开(公告)号:US20120003560A1

    公开(公告)日:2012-01-05

    申请号:US13256290

    申请日:2009-03-18

    IPC分类号: H01M8/04 H01M2/08

    CPC分类号: H01M8/023 H01M8/04276

    摘要: A fuel cell includes an electrode assembly having an electrolyte between a cathode catalyst and an anode catalyst, and a flow field plate having a channel for delivering a reactant gas to the electrode assembly. The flow field plate includes a channel having a channel inlet. A porous diffusion layer is located between the electrode assembly and the flow field plate. The porous diffusion layer includes a first region near the channel inlet and a second region downstream from the first region relative to the channel inlet. The first region includes a filler material that partially blocks pores of the first region such that the first region has a first porosity and the second region has a second porosity that is greater than the first porosity.

    摘要翻译: 燃料电池包括在阴极催化剂和阳极催化剂之间具有电解质的电极组件和具有用于将反应气体输送到电极组件的通道的流场板。 流场板包括具有通道入口的通道。 多孔扩散层位于电极组件和流场板之间。 多孔扩散层包括在通道入口附近的第一区域和相对于通道入口从第一区域下游的第二区域。 第一区域包括填充材料,其部分地阻挡第一区域的孔,使得第一区域具有第一孔隙度,并且第二区域具有大于第一孔隙率的第二孔隙率。

    Low Power Control of Fuel Cell Open Circuit Voltage
    3.
    发明申请
    Low Power Control of Fuel Cell Open Circuit Voltage 有权
    燃料电池开路电压低功率控制

    公开(公告)号:US20110171547A1

    公开(公告)日:2011-07-14

    申请号:US12998152

    申请日:2008-10-03

    IPC分类号: H01M8/04

    摘要: A fuel cell power plant (5) includes a stack (6) of fuel cells, each of which have an anode (9), a cathode (10), and a PEM (11) disposed between the anode and the cathode. A controller (17) recognizes an indication (67) of no load demand (68) by a load (59), to operate (45) an air recycle loop (44-46) utilizing the process air blower (35) and transfer the power output (57) of the stack from the load (59) to an auxiliary load (60), comprising a resistance which will consume a predetermined small amount of power in response to the current applied thereto, when the stack operates at a critical voltage above which fuel cell corrosion is unacceptable. Fuel and air will also be reduced (16, 40). The controller may cause increased cathode recycle when the critical voltage is reached and increased air when the voltage is a fraction of a volt below the critical voltage.

    摘要翻译: 燃料电池发电厂(5)包括燃料电池堆(6),每个燃料电池单元具有设置在阳极和阴极之间的阳极(9),阴极(10)和PEM(11)。 控制器(17)通过负载(59)识别空载需求指示(67),利用处理空气鼓风机(35)操作(45)空气循环回路(44-46),并将 堆叠从负载(59)到辅助负载(60)的功率输出(57),包括响应于施加到其上的电流将消耗预定的小量功率的电阻,当堆栈以临界电压 以上燃料电池腐蚀是不可接受的。 燃料和空气也将减少(16,40)。 当达到临界电压时,控制器可能导致增加的阴极再循环,当电压是低于临界电压的伏特的一小部分时,空气增加。

    PEM fuel cell system with a porous hydrophobloc plug for maintaining system back pressure and methods for designing the plug and for designing systems for using the plug
    4.
    发明授权
    PEM fuel cell system with a porous hydrophobloc plug for maintaining system back pressure and methods for designing the plug and for designing systems for using the plug 有权
    PEM燃料电池系统具有多孔疏水塞塞,用于维持系统背压,设计插头的方法和设计使用插头的系统

    公开(公告)号:US07972745B2

    公开(公告)日:2011-07-05

    申请号:US12799386

    申请日:2010-04-23

    IPC分类号: H01M2/08

    摘要: A polymer electrolyte membrane (PEM) fuel cell power plant is cooled evaporatively by a non-circulating pressurized water coolant system. The coolant system utilizes a hydrophobic porous plug for bleeding air from the coolant water while maintaining coolant back pressure in a coolant flow field of the system. Furthermore, there is a first method for identifying appropriate parameters of the hydrophobic porous plug for use with a known particular coolant system; and a second method for determining proper operating conditions for a fuel cell water coolant system which can operate with a hydrophobic porous plug closure having known physical parameters.

    摘要翻译: 聚合物电解质膜(PEM)燃料电池发电厂通过非循环加压水冷却剂系统蒸发冷却。 冷却剂系统使用疏水性多孔塞,用于从冷却水中排出空气,同时保持系统的冷却剂流场中的冷却剂背压。 此外,存在用于识别用于已知特定冷却剂系统的疏水性多孔塞的适当参数的第一种方法; 以及用于确定燃料电池水冷却剂系统的适当操作条件的第二种方法,所述燃料电池水冷却剂系统可以用具有已知物理参数的疏水性多孔塞子封闭

    Preventing fuel starvation of a fuel cell stack
    7.
    发明授权
    Preventing fuel starvation of a fuel cell stack 有权
    防止燃料电池堆的燃料不足

    公开(公告)号:US07807302B2

    公开(公告)日:2010-10-05

    申请号:US10765737

    申请日:2004-01-27

    申请人: Carl A. Reiser

    发明人: Carl A. Reiser

    IPC分类号: H01M8/04

    CPC分类号: H01M8/04231

    摘要: The direction of flow of purged fuel reactant gas (20) is sensed (38, 39, 44, 53, 54) to ensure it flows outwardly from a fuel cell stack (9) towards the ambient (21). If the purged fuel reactant. gas is not flowing outwardly, a signal (39) causes a controller (26) to open the circuit (35) thereby disconnecting the electrical load (33) from the fuel cell stack.

    摘要翻译: 检测清除的燃料反应物气体(20)的流动方向(38,39,44,53,54),以确保其从燃料电池堆(9)向外流向环境(21)。 如果被清除的燃料反应物。 气体不向外流动,信号(39)使控制器(26)打开电路(35),从而将电负载(33)与燃料电池堆断开。

    Fuel cell minimum fuel recycle with maximum fuel utilization
    8.
    发明授权
    Fuel cell minimum fuel recycle with maximum fuel utilization 有权
    燃料电池最小燃料循环利用率最高

    公开(公告)号:US07732073B2

    公开(公告)日:2010-06-08

    申请号:US10838816

    申请日:2004-05-04

    申请人: Carl A. Reiser

    发明人: Carl A. Reiser

    IPC分类号: H01M8/04

    摘要: Recycle fuel gas is provided (36) to an impeller (34, 34a) for application to the input (24) of the anode flow fields of a fuel cell stack (25). The impeller may be an ejector (34) having its primary input (33) connected to a source (11) of hydrogen and its secondary input (35) connected to the outlet (27, 37) of the fuel cells anode flow fields. The ejector outlet provides the minimum fuel flow required at the lowest power rating. The impeller may be an electrochemical hydrogen pump (34a) with a constant current generator (50) providing for a substantially constant recycle flow (the highest not more than double the lowest), and one pressure regulator (20) providing minimum flow of fresh fuel to the fuel inlets of the first stack. Pressure regulators (20, 21) control the amount of fresh fuel to the anode flow fields for power in excess of minimum power.

    摘要翻译: 向燃料电池堆(25)的阳极流场的输入端(24)施加循环燃料气体(36)到叶轮(34,34a)。 叶轮可以是喷射器(34),其喷射器(34)的主要输入端(33)连接到氢气源(11),其次级输入(35)连接到燃料电池阳极流场的出口(27,37)。 喷射器出口提供最低额定功率所需的最小燃油流量。 叶轮可以是具有恒定电流发生器(50)的电化学氢泵(34a),其提供基本恒定的循环流量(最高不超过最低值的两倍),以及一个压力调节器(20),其提供最小的新鲜燃料流 到第一堆的燃料入口。 压力调节器(20,21)控制阳极流场的新鲜燃料量超过最小功率的功率。

    Fuel cells evaporative reactant gas cooling and operational freeze prevention
    10.
    发明授权
    Fuel cells evaporative reactant gas cooling and operational freeze prevention 有权
    燃料电池蒸发反应物气体冷却和操作防冻

    公开(公告)号:US07579098B2

    公开(公告)日:2009-08-25

    申请号:US11230066

    申请日:2005-09-19

    IPC分类号: H01M8/02 H01M8/04

    摘要: Fuel cells (38) have water passageways (67; 78, 85; 78a, 85a) that provide water through reactant gas flow field plates (74, 81) to cool the fuel cell. The water passageways may be vented to atmosphere (99), by a porous plug (69), or pumped (89, 146) with or without removing any water from the passageways. A condenser (59, 124) receives reactant air exhaust, may have a contiguous reservoir (64, 128), may be vertical, (a vehicle radiator, FIG. 2), may be horizontal, contiguous with the top of the fuel cell stack (37, FIG. 5), or below (124) the fuel cell stack (120). The passageways may be grooves (76, 77; 83, 84) or may comprise a plane of porous hydrophilic material (78a, 85a) contiguous with substantially the entire surface of one or both of the reactant gas flow field plates. Air flow in the condenser may be controlled by shutters (155). The condenser may be a heat exchanger (59a) having freeze-proof liquid flowing through a coil (161) thereof, the amount being controlled by a valve (166). A deionizer (175) may be used.

    摘要翻译: 燃料电池(38)具有通过反应气体流场板(74,81)提供水以冷却燃料电池的水通道(67; 78,85; 78a,85a)。 水通道可以通过多孔塞(69)排放到大气(99),或者通过或不从通道中去除任何水而被泵送(89,146)。 冷凝器(59,124)接收反应物排气,可以具有连续的储存器(64,128),其可以是垂直的(图2的车辆散热器)可以是水平的,与燃料电池堆的顶部邻接 (37,图5)或下面(124)燃料电池堆(120)。 通道可以是凹槽(76,77; 83,84),或者可以包括与反应物气体流场板中的一个或两个的基本上整个表面相邻的多孔亲水材料(78a,85a)的平面。 冷凝器中的气流可由百叶窗(155)控制。 冷凝器可以是具有流过其线圈(161)的防冻液体的热交换器(59a),其量由阀(166)控制。 可以使用去离子器(175)。