Fuel Cell Cathode Flow Field
    8.
    发明申请
    Fuel Cell Cathode Flow Field 有权
    燃料电池阴极流场

    公开(公告)号:US20080213648A1

    公开(公告)日:2008-09-04

    申请号:US11794876

    申请日:2005-12-29

    IPC分类号: H01M2/14 H01M8/02

    CPC分类号: H01M8/0265

    摘要: A fuel cell cathode flow field has multiple channels each with a cross-sectional area that varies along the length of the channel such that oxygen availability at every lengthwise position along the channel is kept substantially constant for a given channel length and air stoichiometry ratio. Each channel comprises a flat floor with substantially constant depth and a pair of side walls extending upwardly from the floor; the side walls each taper inwards from channel inlet to outlet with a convex curve relative to the channel centreline. Achieving substantially uniform oxygen availability throughout the flow field results in substantially uniform current density throughout the flow field, which is desirable for efficient fuel cell operation and improved performance.

    摘要翻译: 燃料电池阴极流场具有多个通道,每个通道的横截面积沿着通道的长度变化,使得沿着通道的每个纵向位置的氧气可用性对于给定的通道长度和空气化学计量比保持基本上恒定。 每个通道包括具有基本恒定深度的平坦地板和从地板向上延伸的一对侧壁; 侧壁各自从通道入口到出口向内逐渐变细,相对于通道中心线具有凸曲线。 在整个流场中实现基本均匀的氧气可用性导致整个流场中的基本上均匀的电流密度,这对于有效的燃料电池操作和改进的性能是期望的。