利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

27 条记录 (耗时 0.021 秒)

    Preparation of patterned diffusion media
    2.
    发明申请
    Preparation of patterned diffusion media 有权
    图案扩散介质的制备

    公开(公告)号：US20050233080A1

    公开(公告)日：2005-10-20

    申请号：US10824032

    申请日：2004-04-14

    申请人： Chunxin Ji ,  Michael Schoeneweiss ,  Mark Mathias ,  Joerg Roth

    发明人： Chunxin Ji ,  Michael Schoeneweiss ,  Mark Mathias ,  Joerg Roth

    IPC分类号： B05D1/32 ,  D21H13/50 ,  D21H19/20 ,  D21H19/66 ,  D21H19/72 ,  D21H19/84 ,  H01M4/86 ,  H01M8/00 ,  H01M8/10

    CPC分类号： H01M8/0239 ,  D21H13/50 ,  D21H19/20 ,  D21H19/66 ,  D21H19/72 ,  D21H19/84 ,  H01M4/8605 ,  H01M8/0234 ,  H01M8/0245 ,  H01M8/1007

    摘要： Gas diffusion media for use in fuel cells are provided that contain a pattern of deposited hydrophobic polymer such that less than 100% of the surface of the diffusion media is covered with hydrophobic polymer. The media are made by first wetting a sheet of carbon fiber paper in an aqueous emulsion of the hydrophobic polymer. The wetted sheet is contacted with a pattern member containing one or more openings oriented to correspond to a predetermined or desired pattern of hydrophobic polymer deposition. While still in contact with the pattern member, the sheet is heated or otherwise treated to cause evaporation of the water from the sheet. Evaporation while in contact with the pattern member takes place in such a way that hydrophobic polymer is concentrated in the sheet at the openings of the pattern member by the process of evaporation.

    摘要翻译： 提供了用于燃料电池的气体扩散介质，其包含沉积的疏水性聚合物的图案，使得少于100％的扩散介质的表面被疏水聚合物覆盖。 介质通过首先在疏水性聚合物的水乳液中润湿碳纤维纸片而制成。 润湿的片材与包含一个或多个开口的图案构件接触，该开口定向成对应于预定或期望的疏水性聚合物沉积图案。 在仍然与图案构件接触的同时，片材被加热或以其他方式处理以引起水从片材的蒸发。 在与图案构件接触的同时进行蒸发，其方式是通过蒸发过程将疏水性聚合物集中在图案构件的开口处的片材中。

    Acrylic fiber bonded carbon fiber paper as gas diffusion media for fuel cell
    4.
    发明申请
    Acrylic fiber bonded carbon fiber paper as gas diffusion media for fuel cell 有权
    丙烯酸纤维粘结碳纤维纸作为燃料电池气体扩散介质

    公开(公告)号：US20070218346A1

    公开(公告)日：2007-09-20

    申请号：US11384706

    申请日：2006-03-20

    申请人： Chunxin Ji ,  Gerald Fleming ,  Margaret Fleming ,  Mark Mathias

    发明人： Chunxin Ji ,  Gerald Fleming ,  Margaret Fleming ,  Mark Mathias

    IPC分类号： H01M4/94 ,  H01M4/96 ,  B32B9/00 ,  D01F9/12

    CPC分类号： D21H13/50 ,  D21H13/18 ,  D21H17/36 ,  H01M8/0234 ,  H01M8/0239 ,  Y02P70/56 ,  Y10T428/30

    摘要： A gas diffusion media for a fuel cell, such as a proton exchange membrane fuel cell, is provided. The gas diffusion media includes carbonizable acrylic pulp fibers instead of conventional phenolic resin as a binder material. The acrylic fibers are mixed with the carbon fiber dispersion during the papermaking step, thus eliminating the phenolic resin impregnation step typically associated with conventional gas diffusion media manufacturing processes. The mat is then cured and carbonized to produce gas diffusion media.

    摘要翻译： 提供了用于燃料电池的气体扩散介质，例如质子交换膜燃料电池。 气体扩散介质包括可碳化的丙烯酸纸浆纤维，而不是传统的酚醛树脂作为粘合剂材料。 丙烯酸纤维在造纸步骤期间与碳纤维分散体混合，从而消除通常与常规气体扩散介质制造方法相关的酚醛树脂浸渍步骤。 然后将垫固化并碳化以产生气体扩散介质。

    GAS DIFFUSION LAYER WITH LOWER GAS DIFFUSIVITY
    5.
    发明申请
    GAS DIFFUSION LAYER WITH LOWER GAS DIFFUSIVITY 审中-公开
    具有较低气体差异的气体扩散层

    公开(公告)号：US20100028744A1

    公开(公告)日：2010-02-04

    申请号：US12185640

    申请日：2008-08-04

    申请人： CHRISTIAN WIESER ,  Chunxin Ji ,  Mark Mathias ,  Daniel R. Baker ,  Paul D. Nicotera

    发明人： CHRISTIAN WIESER ,  Chunxin Ji ,  Mark Mathias ,  Daniel R. Baker ,  Paul D. Nicotera

    IPC分类号： H01M8/10 ,  H01M4/86 ,  H01M8/02

    CPC分类号： H01M8/0243 ,  H01M8/0234 ,  H01M8/0239 ,  H01M2008/1095

    摘要： A gas diffusion layer for use in fuel cells comprises a fiber and non-fiber material in a ratio such that the water vapor diffusion transport resistance is greater than 0.8 s/cm measured at 80 C and 150 kPa absolute gas pressure when the gas diffusion layer has a thickness less than or equal to 300 microns. Another gas diffusion layer comprises a fiber and non-fiber material in a ratio such that the water vapor diffusion transport resistance is lower than 0.4 s/cm measured at 80 C and 150 kPa absolute gas pressure when the gas diffusion layer has a thickness greater than or equal to 100 microns. Fuel cells incorporating the gas diffusion layers are also provided.

    摘要翻译： 用于燃料电池的气体扩散层包括纤维和非纤维材料，其比例使得当气体扩散层在80℃和150kPa绝对气压下测得的水蒸气扩散传输阻力大于0.8s / cm 具有小于或等于300微米的厚度。 另一个气体扩散层包括纤维和非纤维材料，其比例使得当气体扩散层的厚度大于80℃时，在80℃和150kPa绝对气压下测得的水蒸汽扩散传输阻抗低于0.4s / cm 或等于100微米。 还提供了并入气体扩散层的燃料电池。

    Integration of an electrical diode within a fuel cell
    6.
    发明申请
    Integration of an electrical diode within a fuel cell 有权
    在燃料电池内集成一个二极管

    公开(公告)号：US20060147769A1

    公开(公告)日：2006-07-06

    申请号：US11028837

    申请日：2005-01-04

    申请人： Michael Murphy ,  Mark Mathias ,  David Chow

    发明人： Michael Murphy ,  Mark Mathias ,  David Chow

    IPC分类号： H01M8/04 ,  H01M8/10 ,  H01M8/24

    CPC分类号： H01M8/04552 ,  H01M8/0202 ,  H01M8/04753 ,  H01M8/0494 ,  H01M8/1007 ,  H01M8/241 ,  H01M8/2457

    摘要： A fuel cell system that employs a diode electrically coupled between bipolar plates in a fuel cell of a fuel cell stack for preventing the fuel cell between the plates from reversing its polarity. The diode is a thin-sheet p-n diode including doped semiconductor layers and has a thickness relative to the thickness of the MEA in the fuel cell so that the overall stack thickness does not increase. When the fuel cell is operating properly the diode does not conduct and all of the current through the fuel cell goes through the MEA. If the electric load on the stack increases to a level beyond the capability of the fuel cell, where the potential across the fuel cell goes significantly below zero, the diode will begin to conduct so that any current that cannot travel through the MEA with the cell voltage less than one negative forward diode voltage drop is able to go around the MEA through the diode.

    摘要翻译： 一种燃料电池系统，其采用电耦合在燃料电池堆的燃料电池中的双极板之间的二极管，用于防止板之间的燃料电池反转其极性。 二极管是包括掺杂半导体层的薄片p-n二极管，并且具有相对于燃料电池中的MEA的厚度的厚度，使得整个堆叠厚度不增加。 当燃料电池正常工作时，二极管不导通，并且通过燃料电池的电流全部通过MEA。 如果堆叠上的电负载增加到超过燃料电池能力的水平，其中燃料电池两端的电位明显低于零，则二极管将开始导通，使得任何不能通过MEA的电流流过电池 小于1负的正向二极管电压降可通过二极管绕过MEA。

    Capillary layer on flowfield for water management in PEM fuel cell
    7.
    发明申请
    Capillary layer on flowfield for water management in PEM fuel cell 有权
    流场上的毛细管层用于PEM燃料电池中的水管理

    公开(公告)号：US20050181264A1

    公开(公告)日：2005-08-18

    申请号：US10780025

    申请日：2004-02-17

    申请人： Wenbin Gu ,  Gerald Fly ,  Mark Mathias

    发明人： Wenbin Gu ,  Gerald Fly ,  Mark Mathias

    IPC分类号： B05D5/12 ,  C22C29/00 ,  H01M2/00 ,  H01M4/86 ,  H01M8/00 ,  H01M8/02 ,  H01M8/04 ,  H01M8/10 ,  H01M8/24

    CPC分类号： C22C29/00 ,  H01M8/02 ,  H01M8/0232 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0243 ,  H01M8/0245 ,  H01M8/0254 ,  H01M8/0258 ,  H01M8/0267 ,  H01M8/0271 ,  H01M8/04291 ,  H01M8/1007 ,  H01M8/241 ,  H01M8/2457

    摘要： The present invention is directed to an electroconductive element within an electrochemical cell that improves water management. The electroconductive element comprises an impermeable electrically conductive element and a porous liquid distribution media disposed along a major surface of the conductive element. Preferably, the liquid distribution media is in direct contact and fluid communication with a fluid distribution layer disposed between the membrane electrode assembly (MEA) and the liquid distribution media, so that liquids are drawn from the MEA through the fluid distribution layer to and through the liquid distribution media. The liquid distribution media transports liquids away from the MEA in the fuel cell. Methods of fabricating and operating fuel cells and electroconductive elements according to the present invention are also contemplated.

    摘要翻译： 本发明涉及改进水管理的电化学电池内的导电元件。 导电元件包括​​不可渗透的导电元件和沿着导电元件的主表面设置的多孔液体分配介质。 优选地，液体分配介质与设置在膜电极组件（MEA）和液体分配介质之间的流体分配层直接接触并且流体连通，使得液体从MEA通过流体分配层从所述流体分配层抽出并通过 液体分配介质。 液体分配介质将液体远离燃料电池中的MEA。 也可以考虑制造和操作根据本发明的燃料电池和导电元件的方法。

    ADHOC NETWORKING
    9.
    发明申请
    ADHOC NETWORKING 失效
    ADHOC网络

    公开(公告)号：US20100260064A1

    公开(公告)日：2010-10-14

    申请号：US11804049

    申请日：2007-05-16

    申请人： Shashank Garg ,  P. Ravi Menon ,  Mark Mathias

    发明人： Shashank Garg ,  P. Ravi Menon ,  Mark Mathias

    IPC分类号： H04L12/28

    CPC分类号： H04W40/20

    摘要： This invention provides a method of transmitting and receiving packets containing data and positional information for a plurality of devices in a radio frequency network in combination with a global positioning system. The periodic position coordinates of each said device are determined using the global positioning system. The position coordinates are transmitted from each device at staggered points in time that are randomized, and the randomizing operation is performed in discrete steps, wherein the time period of each discrete step is of adequate duration for one device to transmit a positional update. A positional update table and proximity table is created and maintained for each device, and these tables are transmitted to every other device in the network at periodic intervals.

    摘要翻译： 本发明提供了一种在全球定位系统中与无线电频率网络中的多个设备一起发送和接收包含数据和位置信息的分组的方法。 使用全球定位系统确定每个所述设备的周期性位置坐标。 在随机化的交错时间点，从每个设备发送位置坐标，并且以离散步骤执行随机化操作，其中每个离散步长的时间段对于一个设备发送位置更新具有足够的持续时间。 为每个设备创建和维护位置更新表和接近表，并且这些表以周期性间隔被发送到网络中的每个其他设备。

    Fuel cell stack that utilizes an actuator to switch between interdigitated and straight flow for optimizing performance
    10.
    发明授权
    Fuel cell stack that utilizes an actuator to switch between interdigitated and straight flow for optimizing performance 有权
    燃料电池堆，利用执行器在叉指和直流之间切换，以优化性能

    公开(公告)号：US07803497B2

    公开(公告)日：2010-09-28

    申请号：US11341285

    申请日：2006-01-27

    申请人： Thomas W Tighe ,  Mark Mathias

    发明人： Thomas W Tighe ,  Mark Mathias

    IPC分类号： H01M8/02 ,  H01M8/00

    CPC分类号： H01M8/0258 ,  H01M8/241 ,  H01M8/242 ,  H01M8/2457 ,  H01M8/2483 ,  H01M2008/1095 ,  H01M2250/20 ,  Y02T90/32

    摘要： A fuel cell stack that includes an actuating device or devices for selectively providing interdigitated reactant gas flow and straight reactant gas flow through reactant gas flow channels to reduce water accumulation in the diffusing media layers of the stack. In one embodiment, the fuel cell stack employs internal actuators that selectively close the inlet end of every other flow channel and the outlet end of every other opposite flow channel to provide the interdigitated flow. In another embodiment, the interdigitated flow is provided by external actuation where two inlet manifolds and two outlet manifolds are provided. One input manifold is closed to close the input ends of every other flow channel and one outlet manifold is closed to close the output ends of every other opposite flow channel.

    摘要翻译： 一种燃料电池堆，其包括致动装置或用于选择性地提供交错的反应气体流和通过反应气体流动通道的直反应气体流的装置，以减少堆叠的扩散介质层中的积水。 在一个实施例中，燃料电池堆采用内部致动器，其选择性地关闭每隔一个流动通道的入口端和每隔一个相对的流动通道的出口端，以提供叉指流。 在另一个实施例中，通过外部致动提供交错流，其中提供两个入口歧管和两个出口歧管。 一个输入歧管关闭以关闭每个其他流动通道的输入端，一个出口歧管关闭以关闭每隔一个相对流动通道的输出端。