公开(公告)号：US20100190076A1

公开(公告)日：2010-07-29

申请号：US12358989

申请日：2009-01-23

申请人： JOHN C. FAGLEY ,  Steven R. Falta

发明人： JOHN C. FAGLEY ,  Steven R. Falta

IPC分类号： H01M8/04

CPC分类号： H01M8/04507 ,  H01M8/04231 ,  H01M8/04828

摘要： A system and method for providing a fuel cell stack purge at fuel cell system shut-down. The method provides a two-stage purge process where the first stage purge uses humidified cathode air to get the fuel cell stack to a known stack hydration level from an unknown stack hydration level at system shut-down. As the stack is purged with the humidified air, the hydration level of the stack decreases asymptotically to the known stack hydration level where the duration of the first stage is set based on the asymptote as a safety margin. Once the known hydration level is achieved, then the second stage purge is performed with dry air to further reduce the stack hydration to a final desired hydration level.

摘要翻译： 一种用于在燃料电池系统关闭时提供燃料电池堆清洗的系统和方法。 该方法提供两级清洗过程，其中第一级清洗使用加湿的阴极空气将燃料电池堆从系统停机时的未知堆积水合水平获得到已知的堆积水合水平。 当堆叠被加湿的空气吹扫时，堆叠的水合水平渐近地减小到已知堆积水化水平，其中基于渐近线设置第一阶段的持续时间作为安全裕度。 一旦实现了已知的水合水平，则用干燥空气进行第二阶段吹扫，以进一步将堆积水化降低到最终期望的水化水平。