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    • 43. 发明申请
    • Low Power Control of Fuel Cell Open Circuit Voltage
    • 燃料电池开路电压低功率控制
    • US20110171547A1
    • 2011-07-14
    • US12998152
    • 2008-10-03
    • Matthew P. WilsonVenkateshwarlu YadhaCarl A. Reiser
    • Matthew P. WilsonVenkateshwarlu YadhaCarl A. Reiser
    • H01M8/04
    • H01M8/04626H01M8/04552H01M8/04753H01M8/04761H01M8/04873H01M8/04947H01M2250/20Y02E60/50Y02T10/92Y02T90/32
    • 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.
    • 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。
    • 46. 发明授权
    • Fuel cell minimum fuel recycle with maximum fuel utilization
    • 燃料电池最小燃料循环利用率最高
    • US07732073B2
    • 2010-06-08
    • US10838816
    • 2004-05-04
    • Carl A. Reiser
    • Carl A. Reiser
    • H01M8/04
    • H01M8/249H01M8/04089H01M8/04097H01M8/04104H01M8/04231H01M8/0681H01M2250/20Y02T90/32
    • 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.
    • 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。
    • 48. 发明申请
    • Fuel Cell Power Plant Diverting Air in Response to Low Demand
    • 燃料电池发电厂响应低需求转向空气
    • US20090098427A1
    • 2009-04-16
    • US12085401
    • 2005-11-29
    • Carl A. Reiser
    • Carl A. Reiser
    • H01M8/04
    • H01M8/04753H01M8/0258H01M8/04089H01M8/04119H01M8/04223H01M8/04559H01M8/04589H01M8/0488H01M8/241H01M2008/1095H01M2250/20Y02T90/32Y02T90/34
    • A fuel cell system, which may be powering a vehicle propulsion system (159), includes a fuel cell power plant having a stack (151) including a plurality of fuel cells (12), each having a cathode (19) and anode (17) separated by a membrane (16), and an air pump (174) connected to reactant air flow fields through a diverter valve (172). A controller (185) is responsive to normal and high demand to cause the diverter valve to allow air to flow from the pump to the reactant air flow fields, and is responsive to low demand to cause said diverter valve to divert air directly into ambient so that it does not reach the cathode, thereby to reduce open circuit voltage conditions that promote degradation of the cathode, and to prevent excessive performance decay. An auxiliary load (220) can be in the diverted air flow, either ahead of or after the diverter valve. Energy storage (200, 201) works with the vehicle propulsion system.
    • 可以为车辆推进系统(159)供电的燃料电池系统包括燃料电池发电厂,其具有包括多个燃料电池(12)的堆叠(151),每个燃料电池单元具有阴极(19)和阳极(17) )和通过分流阀(172)连接到反应物气流场的气泵(174)。 控制器(185)响应于正常和高的需求以使分流阀允许空气从泵流动到反应物气流场,并且响应于低需求以使所述分流阀将空气直接转入环境中 它不会到达阴极,从而降低促进阴极退化的开路电压条件,并防止过度的性能衰减。 辅助负载(220)可以在转向阀之前或之后的转向空气流中。 储能(200,201)与车辆推进系统配合使用。