公开(公告)号：US06896982B2

公开(公告)日：2005-05-24

申请号：US10158408

申请日：2002-05-30

申请人： Nengyou Jia ,  Benno Giesecke

发明人： Nengyou Jia ,  Benno Giesecke

IPC分类号： H01M4/86 ,  H01M8/04 ,  H01M8/10 ,  H01M8/00 ,  H01M2/14 ,  H01M8/18

CPC分类号： H01M8/04089 ,  H01M4/8605 ,  H01M8/1004 ,  Y02P70/56

摘要： Certain fuel cells (e.g., solid polymer electrolyte fuel cells) may temporarily exhibit below normal performance after initial manufacture or after prolonged storage. While normal performance levels may be obtained after operating such fuel cells for a suitable time period, this process can take of order of days to fully complete. However, exposing the cathode to a reductant (e.g., hydrogen) can provide for normal performance levels without the need for a lengthy initial operating period.

摘要翻译： 某些燃料电池（例如，固体聚合物电解质燃料电池）在初始制造之后或在长时间储存​​之后可能暂时低于正常性能。 虽然在合适的时间段内操作这种燃料电池之后可以获得正常的性能水平，但该过程可能需要几天的时间才能完全完成。 然而，将阴极暴露于还原剂（例如氢）可以提供正常的性能水平，而不需要长的初始操作周期。

公开(公告)号：US06861167B2

公开(公告)日：2005-03-01

申请号：US09916213

申请日：2001-07-25

申请人： Brian Wells ,  Tan Duc Uong ,  Charles Joseph Schembri ,  Gregory A. James ,  George Alexander Skinner ,  Benno Giesecke

发明人： Brian Wells ,  Tan Duc Uong ,  Charles Joseph Schembri ,  Gregory A. James ,  George Alexander Skinner ,  Benno Giesecke

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

CPC分类号： H01M8/04231

摘要： A fuel cell system includes fuel cells forming a fuel cell stack, having a fuel passage and an oxidant passage. A purge valve is coupled to the fuel passage to exhaust contaminants, and a controller is coupled to temporarily increase the oxidant stream flow rate through the oxidant passage, and to temporarily open the fuel purge valve, if a voltage across a pair of fuel cells is less than a defined threshold voltage. In this resuscitation step, the oxidant flow rate can be temporarily increased by increasing a duty cycle of an air compressor by approximately 50% for a duration of between approximately 5 to 10 seconds. The controller can further shut down fuel cell operation if a voltage across a pair of fuel cells is less than a defined threshold voltage in an inter-resuscitation period immediately following the resuscitation step.

摘要翻译： 燃料电池系统包括形成具有燃料通道和氧化剂通道的燃料电池堆的燃料电池。 净化阀联接到燃料通道以排出污染物，并且控制器被耦合以临时增加通过氧化剂通道的氧化剂流流速，并且如果一对燃料电池两端的电压为 小于定义的阈值电压。 在该复苏步骤中，通过将空气压缩机的占空比增加大约50％，持续约5至10秒之间，可以临时增加氧化剂流速。 如果一对燃料电池上的电压在复苏步骤之后的复苏期间小于定义的阈值电压，则控制器可以进一步关闭燃料电池操作。