公开(公告)号：US06479177B1

公开(公告)日：2002-11-12

申请号：US09406318

申请日：1999-09-27

申请人： Joy A. Roberts ,  Jean St-Pierre ,  Marian E. van der Geest ,  Abderrahmane Atbi ,  Nicholas J. Fletcher

发明人： Joy A. Roberts ,  Jean St-Pierre ,  Marian E. van der Geest ,  Abderrahmane Atbi ,  Nicholas J. Fletcher

IPC分类号： H01M804

CPC分类号： H01M8/04029 ,  H01M8/0267 ,  H01M8/04007 ,  H01M8/04119 ,  H01M8/04156 ,  H01M8/04223 ,  H01M8/04253 ,  H01M8/04268 ,  H01M8/04303 ,  H01M8/241 ,  H01M8/2457 ,  H01M2008/1095 ,  H01M2300/0082

摘要： A method of ceasing operation of an electric power generation system improves the cold start capability and freeze tolerance of a fuel cell stack by reducing the amount of water remaining within the passages of the stack. The method involves purging one or more of the fuel cell stack oxidant and fuel passages at shutdown prior to allowing the fuel cell stack to drop to temperatures below the freezing point of water. Preferably purging at shutdown is conducted at a temperature below the stack operating temperature.

摘要翻译： 停止发电系统运转的方法通过减少堆叠通道内剩余的水量来提高燃料电池堆的冷启动能力和冷冻公差。 该方法包括在关闭燃料电池堆氧化剂和燃料通道之前清除燃料电池堆的一个或多个，然后使燃料电池堆降到低于水凝固点的温度。 优选地，在低于堆叠工作温度的温度下进行关闭时的清洗。

公开(公告)号：US07482085B2

公开(公告)日：2009-01-27

申请号：US10833228

申请日：2004-04-26

申请人： Joy A Roberts ,  Jean St-Pierre ,  Marian E van der Geest ,  Abderrahmane Atbi ,  Nicholas J Fletcher

发明人： Joy A Roberts ,  Jean St-Pierre ,  Marian E van der Geest ,  Abderrahmane Atbi ,  Nicholas J Fletcher

IPC分类号： H01M8/04

CPC分类号： H01M8/04225 ,  H01M8/04007 ,  H01M8/04029 ,  H01M8/04119 ,  H01M8/04156 ,  H01M8/04223 ,  H01M8/241 ,  H01M8/2457 ,  H01M2300/0082

摘要： An electric power generation system has elements that improve the cold start capability and freeze tolerance of a constituent fuel cell stack cooperate to reduce the amount of water remaining within the passages of the stack. The system includes a purge system that is connectable to the oxidant supply, fuel supply and/or coolant passages upstream of the stack. When the stack is shut down, the stack is disconnected from an external circuit, and purge fluid is transmitted by the purge system through the stack before the stack falls below the freezing point of water. In systems where fuel and/or oxidant streams are humidified prior to entry into the stack, a humidifier bypass system may be provided in place of the purge system. The humidifier bypass system transmits reactant fluid to the stack in fluid isolation from the humidifier, so that the inlet reactant streams are unhumidified.

摘要翻译： 发电系统具有提高组分燃料电池堆的冷启动能力和冷冻公差的元件，其协作以减少堆叠通道内剩余的水量。 该系统包括可连接到堆叠上游的氧化剂供应源，燃料供应源和/或冷却剂通道的净化系统。 当堆叠关闭时，堆叠与外部电路断开连接，并且在堆叠降低到水的冰点之前，净化系统通过堆叠传输净化流体。 在燃料和/或氧化剂流在进入堆叠之前被加湿的系统中，可以提供加湿器旁路系统来代替净化系统。 加湿器旁路系统将反应物流体与加湿器以流体隔离的方式将反应物流体传送到堆叠中，使得入口反应物流不加湿。