Joining of bipolar plates in proton exchange membrane fuel cell stacks
    10.
    发明授权
    Joining of bipolar plates in proton exchange membrane fuel cell stacks 有权
    在质子交换膜燃料电池堆中连接双极板

    公开(公告)号:US06887610B2

    公开(公告)日:2005-05-03

    申请号:US10347890

    申请日:2003-01-21

    摘要: A bipolar plate assembly for a proton exchange membrane fuel cell stack advantageously connects electrically conductive plate surfaces, without the requirement to weld or braze the plate pairs. Each plate has alternating coolant channels and lands formed on an inside facing surface. An electrically conductive layer is deposited over at least the coolant channels and lands. Pairs of plates are aligned having facing electrically conductive layers. A fluid seal is disposed between the inside facing surfaces about a perimeter of the coolant channels. Each plate pair is compressed to form a plurality of electrical bond lines between adjacent lands within the perimeter seal. The perimeter seal prevents stack reactant gas oxygen from contacting and oxidizing the electrically conductive layer. A dielectric coolant is also used to reduce oxidation of the electrically conductive layer.

    摘要翻译: 用于质子交换膜燃料电池堆的双极板组件有利地连接导电板表面,而不需要焊接或钎焊板对。 每个板具有形成在面向内侧的表面上的交替的冷却剂通道和平台。 在至少冷却剂通道和焊盘上沉积导电层。 一对板对准具有面向导电层。 流体密封件围绕冷却剂通道的周边布置在面向内的表面之间。 每个板对被压缩以在周边密封件内的相邻平台之间形成多个电接合线。 周边密封件防止堆叠反应物气体氧气接触并氧化导电层。 电介质冷却剂也用于减少导电层的氧化。