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    SERPENTINE FLOW FIELD WITH VARYING NUMBERS OF CHANNEL PORTIONS
    43.
    发明公开
    SERPENTINE FLOW FIELD WITH VARYING NUMBERS OF CHANNEL PORTIONS 有权
    蛇形流体场变化的信道共享NUMBER

    公开(公告)号：EP2891202A1

    公开(公告)日：2015-07-08

    申请号：EP12883561.8

    申请日：2012-08-28

    申请人： Ballard Power Systems Inc.

    发明人： O'NEILL, Jonathan Daniel ,  CARNEVALE, Christopher John

    IPC分类号： H01M8/02 ,  H01M8/18

    CPC分类号： H01M8/0263 ,  H01M8/0258 ,  H01M8/026 ,  H01M8/0265 ,  H01M8/0267

    摘要： An exemplary flow field includes a plurality of flow channel portions. There are n inlet portions configured for introducing a fluid into the flow field. A plurality of first pass portions direct fluid flow in a first direction. A plurality of second pass portions direct fluid flow in a second direction that is generally parallel to and opposite to the first direction. A plurality of third pass portions direct fluid flow in the first direction. n outlet portions are configured to allow fluid to exit the flow field. n is an integer and a number of the portions in at least one plurality of pass portions is a non-integer multiple of n.

    THERMAL CONTROL OF FUEL CELL FOR IMPROVED COLD START
    49.
    发明公开
    THERMAL CONTROL OF FUEL CELL FOR IMPROVED COLD START 有权
    用于改进冷启动燃料电池的热控制

    公开(公告)号：EP1913652A2

    公开(公告)日：2008-04-23

    申请号：EP06785381.2

    申请日：2006-06-21

    申请人： BALLARD POWER SYSTEMS INC.

    发明人： LIN, Bruce

    IPC分类号： H01M8/04 ,  H01M16/00 ,  H01M8/10

    CPC分类号： H01M8/04268 ,  H01M8/04007 ,  H01M8/04029 ,  H01M8/0432 ,  H01M8/04365 ,  H01M8/04768 ,  H01M8/04955 ,  H01M16/003 ,  H01M2008/1095

    摘要： Improvements in startup time for an electrochemical fuel cell system from freezing and sub-freezing temperatures are obtained by utilizing an insulated fuel cell stack in combination with an thermal control subsystem. Temperature of the insulated electrochemical fuel cell stack, as well as temperature of the ambient environment, are monitored and a heating fluid is heated by thermal transfer with the environment under appropriate thermal conditions. The heated fluid is then passed to the insulated fuel cell in order to increase the temperature of the same, typically to a temperature at or near the temperature of the ambient environment. In this manner, ambient heat from the environment is utilized to increase the temperature of the insulated fuel cell stack, thus improving conditions for subsequent cold start of the insulated fuel cell stack.

    SUMMER AND WINTER MODE OPERATION OF FUEL CELL STACKS
    50.
    发明公开
    SUMMER AND WINTER MODE OPERATION OF FUEL CELL STACKS 审中-公开
    SOMMER- UND WINTERBETRIEBSARTFÜRBRENNSTOFFZELLENSTAPEL

    公开(公告)号：EP1836743A2

    公开(公告)日：2007-09-26

    申请号：EP05854889.2

    申请日：2005-12-20

    申请人： Ballard Power Systems Inc.

    发明人： BACH, Peter, J. ,  LOUIE, Craig, R. ,  ANDREWES, Caroline, J., E.

    IPC分类号： H01M8/04 ,  H01M8/10 ,  H01M8/02

    CPC分类号： H01M8/04119 ,  H01M8/0263 ,  H01M8/0267 ,  H01M8/04097 ,  H01M8/04156 ,  H01M8/04253 ,  H01M8/04828 ,  H01M8/04835 ,  H01M8/0485 ,  H01M8/04955 ,  H01M8/04992 ,  H01M8/241 ,  H01M8/2483

    摘要： A fuel cell subject to intermittent use may be operated in two distinct modes, a 'summer' or a 'winter' mode, depending on whether the cell is expected to be stored at below freezing temperatures or not. At steady state in summer mode, much of the cell interior may be fully saturated with water and thus may contain liquid water. While such conditions may be most desirable for performance reasons during operation, the presence of liquid water however may be detrimental when storing at below freezing temperatures. At steady state in winter mode, the cell interior is essentially sub-saturated throughout and liquid water is not present to form ice during storage. Winter mode operation allows for improved performance during startup, especially in automotive solid polymer electrolyte fuel cell stacks.

    摘要翻译： 间歇使用的燃料电池可以以两种不同的模式操作，即“夏季”或“冬季”模式，这取决于电池是否预期在低于冰点的温度下储存。 在夏季模式下处于稳定状态，大部分细胞内部可能被水完全饱和，因此可能含有液态水。 虽然在操作期间这种条件可能是最理想的，但是当存储在低于冰点的温度下时，液态水的存在可能是有害的。 在冬季模式下稳定状态下，细胞内部基本上是饱和的，储存过程中不存在液态水以形成冰。 冬季模式操作允许在启动期间提高性能，特别是在汽车固体聚合物电解质燃料电池堆中。