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    • 1. 发明授权
    • Passive restriction pathways in fuel cell water drainage
    • 燃料电池排水中的被动限制通路
    • US07662495B2
    • 2010-02-16
    • US10981848
    • 2004-11-05
    • Pinkhas A RapaportEric L Thompson
    • Pinkhas A RapaportEric L Thompson
    • H01M8/04H01M8/02
    • H01M8/04179H01M8/026H01M8/0263H01M8/1018
    • A passive restriction passageway (for example, a passive capillary valve or a restricting orifice) positioned to drain accumulated liquid from a fuel cell reactant flow channel is used in conjunction with a control element for periodically adjusting the pressure across the passageway. The control element intermittently adjusts pressure across the passageway to enable liquid flow through the passageway. The restriction passageways and the adjustment of pressure periodically move liquid water through the passageways to drain liquid buildup from the reactant supply channels. Together, these features enable sustained performance from the fuel cell during operation and also prevent damage to the fuel cell when the fuel cell is exposed to freezing temperatures (especially after shutdown of the fuel cell).
    • 被定位为从燃料电池反应物流动通道排出积聚的液体的被动限制通道(例如,被动毛细阀或限制孔)与用于周期性地调节通过通道的压力的控制元件结合使用。 控制元件间歇地调节通过通道的压力,以使液体流过通道。 限制通道和压力调节周期性地将液态水通过通道排出反应物供应通道的液体积聚。 一起,这些特征使得在操作期间来自燃料电池的持续性能,并且还防止当燃料电池暴露于冷冻温度(特别是在关闭燃料电池之后)对燃料电池的损坏。