Method and apparatus for the operation of a cell stack assembly during subfreezing temperatures
    11.
    发明授权
    Method and apparatus for the operation of a cell stack assembly during subfreezing temperatures 失效
    在解冻温度期间操作细胞堆叠组件的方法和装置

    公开(公告)号:US07282285B2

    公开(公告)日:2007-10-16

    申请号:US10473989

    申请日:2002-04-05

    IPC分类号: H01M8/04

    摘要: A cell stack assembly (102) coolant system comprises a coolant exhaust conduit (110) in fluid communication with a coolant exhaust manifold (108) and a coolant pump (112). A coolant inlet conduit (120) enables transportation of the coolant to the coolant inlet manifold. The coolant system further includes a bypass conduit (132) in fluid communication with the coolant exhaust manifold and the coolant inlet manifold, while a bleed valve (130) is in fluid communication with the coolant exhaust conduit and a source of gas. Operation of the bleed valve enables venting of the coolant from the coolant channels, and through a shut down conduit (124). An increased pressure differential between the coolant and reactant gases forces water out of the pores in the electrode substrates (107,109). An ejector (250) prevents air form inhibiting the pump. Pulsed air is blown (238,239,243,245) through the coolant channels to remove more water.

    摘要翻译: 电池堆组件(102)冷却剂系统包括与冷却剂排气歧管(108)和冷却剂泵(112)流体连通的冷却剂排放导管(110)。 冷却剂入口管道(120)能够将冷却剂输送到冷却剂入口歧管。 冷却剂系统还包括与冷却剂排出歧管和冷却剂入口歧管流体连通的旁通管道(132),而排放阀(130)与冷却剂排放管道和气体源流体连通。 泄放阀的操作使冷却剂从冷却剂通道排出,并通过关闭导管(124)。 冷却剂和反应气体之间的增加的压差迫使水从电极基板(107,109)中的孔隙中流出。 喷射器(250)防止空气形式阻止泵。 脉冲空气通过冷却剂通道吹出(238,239,243,245)以除去更多的水。

    Method of using graphite for making hydrophilic articles
    12.
    发明申请
    Method of using graphite for making hydrophilic articles 审中-公开
    使用石墨制造亲水制品的方法

    公开(公告)号:US20070147187A1

    公开(公告)日:2007-06-28

    申请号:US11320517

    申请日:2005-12-28

    IPC分类号: B32B9/00 C09C1/44 G11B11/00

    摘要: A water transport plate assembly that is useful in fuel cells includes at least one hydrophilic article such as a flow field layer. A method of making the hydrophilic article includes establishing a hydrophilicity of the article by including a plurality of graphite particles (112) having a particular physical characteristic that imparts the hydrophilicity to the article. In one disclosed example, the selected graphite particles (112) have a wettability ratio of a hydrophilic surface area to a total surface area that is sufficient to make the article hydrophilic. In a disclosed example, the wettability ratio is more than 0.10. In a disclosed example, the graphite particles are selected based upon a percentage of prismatic surface area of the total surface area.

    摘要翻译: 可用于燃料电池的水输送板组件包括至少一个亲水制品,如流场层。 制备亲水制品的方法包括通过包括具有赋予制品亲水性的特定物理特性的多个石墨颗粒(112)来确定制品的亲水性。 在一个公开的实施例中,所选择的石墨颗粒(112)具有足以使制品亲水的亲水表面积与总表面积的润湿性比。 在公开的实施例中,润湿性比大于0.10。 在公开的示例中,基于总表面积的棱镜表面积的百分比来选择石墨颗粒。

    End-cell thermal distancing for fuel cell system
    13.
    发明授权
    End-cell thermal distancing for fuel cell system 有权
    燃料电池系统的终端热隔离

    公开(公告)号:US06824901B2

    公开(公告)日:2004-11-30

    申请号:US10225527

    申请日:2002-08-21

    IPC分类号: H01M802

    摘要: A PEM fuel cell system includes a plurality of PEM fuel cells arranged in a stack having two opposed, outwardly facing end surfaces; pressure plates positioned relative to said end surfaces for securing said PEM fuel cells in said stack; and spacer members between said end surfaces and said pressure plates for thermally insulating said end surfaces from said pressure plates.

    摘要翻译: PEM燃料电池系统包括布置在具有两个相对的面向外的端面的堆叠中的多个PEM燃料电池; 相对于所述端面定位的压板,用于将所述PEM燃料电池固定在所述堆叠中; 以及在所述端面和所述压板之间的间隔件,用于将所述端面与所述压板绝热。

    Performance recovery process for PEM fuel cells
    14.
    发明授权
    Performance recovery process for PEM fuel cells 有权
    PEM燃料电池的性能恢复过程

    公开(公告)号:US06709777B2

    公开(公告)日:2004-03-23

    申请号:US10103584

    申请日:2002-03-20

    IPC分类号: H01M800

    摘要: Recovery of PEM fuel cell performance is achieved by evacuating (61, 62) or by flowing water absorbing gas (46) through, or both, the fuel flow field (12, 13, 19, 20), the air flow field (25, 26, 30, 31), and the water flow field (36, 39), while resistance of the individual cells, or of the fuel cell stack, is measured; the dry out process is continued until the resistance of the cells (or the resistance per cell, measured across the fuel cell stack as a whole), has increased by at least 5 to 1 (preferably 10 to 1) over the normal resistance of the cells. The water absorbing gas may be air (23) or nitrogen (47); it may be at ambient temperature or heated (50).

    摘要翻译: PEM燃料电池性能的恢复是通过抽空(61,62)或使吸水气体(46)流过燃料流场(12,13,19,20),或者两者都通过气流场(25, 26,30,31)和水流场(36,39),同时测量各个电池或燃料电池堆的电阻; 干燥过程继续进行,直到细胞的电阻(或整个燃料电池堆上测量的每个电池的电阻)与正常电阻相比增加至少5至1(优选10至1) 细胞。 吸水气体可以是空气(23)或氮气(47); 它可能在环境温度或加热(50)。

    SEPARATOR PLATE CONFIGURATION FOR A FUEL CELL
    16.
    发明申请
    SEPARATOR PLATE CONFIGURATION FOR A FUEL CELL 有权
    燃料电池的分离板配置

    公开(公告)号:US20110008698A1

    公开(公告)日:2011-01-13

    申请号:US12922724

    申请日:2008-04-23

    IPC分类号: H01M8/04

    摘要: A fuel cell includes a membrane electrode assembly comprised of a membrane sandwiched between anode and cathode catalyst structures. An anode separator plate and a cathode separator plate are arranged adjacent to the membrane electrode assembly opposite from one another. The anode and cathode separator plates include opposing sides in which one of the opposing sides of the anode and cathode respectively have fuel and oxidant flow fields in communication with the membrane. The anode separator plate is a structure having a first water permeability and is configured to permit passage of water between its opposing sides and with its flow field, and the cathode separator plate comprises a structure having a second water permeability less than the first water permeability of the anode separator plate. In one example, the anode is provided by a porous separator plate, and the cathode is provided by a non-porous, or solid, plate.

    摘要翻译: 燃料电池包括由夹在阳极和阴极催化剂结构之间的膜构成的膜电极组件。 阳极隔板和阴极隔板相邻地布置在膜电极组件附近。 阳极和阴极隔板包括相对的侧面,阳极和阴极的相对侧中的一个分别具有与膜连通的燃料和氧化剂流场。 阳极隔板是具有第一透水性的结构,其构造成允许水在其相对的侧面和其流场之间通过,并且阴极隔板包括具有小于第一透水性的第二透水性的结构 阳极隔板。 在一个实例中,阳极由多孔隔板提供,阴极由无孔或固体板提供。

    Catalytic combustors keeping contained medium warm in response to hydrostatic valve
    18.
    发明申请
    Catalytic combustors keeping contained medium warm in response to hydrostatic valve 有权
    催化燃烧器保持含有介质温度响应静液阀

    公开(公告)号:US20090280036A1

    公开(公告)日:2009-11-12

    申请号:US11794599

    申请日:2005-10-31

    IPC分类号: B01J19/00

    摘要: Water (9) in a fuel cell accumulator (10) is kept above freezing by a hydrogen/oxygen catalytic combustor (13) fed hydrogen through a mechanical thermostatic valve (25) in thermal communication (26) with the container (10) or the air nearby, and connected to hydrogen (28), optionally in series with a timer valve (183). The combustor may comprise an ejector (32) having hydrogen through its primary inlet (31) drawing air through a secondary inlet (33), or a diffusion combustor having a catalyst (38), including TEFLON® to permit water generated by combustion to flow by gravity out of the catalyst, spaced from a heating surface (30), and a diffusion control device (40); low partial pressure of oxygen at the catalyst causing diffusion through the device. Combustion vapor condenses on a surface (146) and is led by hydrophilic woven carbon paper (126) and wicking material (133) downwardly, through a disk (140) and plugs (147) either to ambient to a salt canister (190), or to a porous hydrophilic mixer (200) for mixture with antifreeze (206).

    摘要翻译: 燃料电池蓄能器(10)中的水(9)通过氢气/氧气催化燃烧器(13)保持高于通过与容器(10)热交换的机械恒温阀(25)或氢气 空气附近,并连接到氢(28),任选地与定时阀(183)串联。 燃烧器可以包括具有通过其主入口(31)的氢气的喷射器(32),其通过次级入口(33)抽吸空气,或者具有催化剂(38)的扩散燃烧器,包括TEFLON以允许由燃烧产生的水 通过重力流出催化剂,与加热表面(30)间隔开;以及扩散控制装置(40); 在催化剂下氧的低分压导致通过该装置的扩散。 燃烧蒸气在表面(146)上冷凝,并且由亲水性编织碳纸(126)和芯吸材料(133)向下引导通过盘(140)和塞子(147)到环境到盐罐(190), 或与用于与防冻剂(206)混合的多孔亲水混合器(200)。

    Catalytic combustors keeping contained medium warm in response to hydrostatic valve
    19.
    发明授权
    Catalytic combustors keeping contained medium warm in response to hydrostatic valve 有权
    催化燃烧器保持含有介质温度响应静液阀

    公开(公告)号:US07410619B2

    公开(公告)日:2008-08-12

    申请号:US11027333

    申请日:2004-12-29

    IPC分类号: F01N3/20 H01M8/04

    摘要: The medium (9), such as water, of a container (10), such as a fuel cell accumulator, is kept above freezing by a hydrogen/oxygen catalytic combustor (13) fed hydrogen from a source comprising a mechanical thermostatic valve (25) in thermal communication (26) with the container (10) and connected to a hydrogen supply (28). The combustor may comprise an ejector (32) having hydrogen through its primary inlet (31) drawing air through a secondary inlet (33). The combustor may comprise a diffusion combustor having a catalyst (38) spaced from a heating surface (30) and a diffusion control plate (40) low partial pressure of oxygen at the catalyst causing diffusion through the barrier. Water vapor from combustion condenses on a surface (146) and is led by hydrophilic woven carbon paper (126) to wicking material (133), which has smaller pores than the carbon paper, which leads the water downwardly, through a disk (140) and plugs (147) to atmospheric air. The noble metal catalyst mixture includes TEFLON® to permit water generated by combustion to flow by gravity out of the catalyst.

    摘要翻译: 诸如燃料电池蓄能器的容器(10)等介质(如水)通过氢气/氧气催化燃烧器(13)保持在高于冰的位置,氢气/氧气催化燃烧器(13)从包含机械恒温阀(25 )与容器(10)热连通(26)并连接到氢气供应(28)。 燃烧器可以包括通过其主入口(31)具有氢气的喷射器(32),空气通过次级入口(33)抽吸空气。 燃烧器可以包括具有与加热表面(30)间隔开的催化剂(38)和扩散控制板(40)的扩散燃烧器,催化剂上的低氧分压导致通过阻挡层的扩散。 来自燃烧的水蒸汽在表面(146)上冷凝并由亲水性编织碳纸(126)引导到芯吸材料(133),其具有比碳纸更小的孔,其通过盘(140)向下引导水, 并将塞子(147)连接到大气中。 贵金属催化剂混合物包括使燃烧产生的水通过重力流出催化剂的TEFLON。