Methods for improving the cold starting capability

专利名称：Methods for improving the cold starting

capability of an electrochemical fuel cell

发明人：Roberts, Joy A.,St-Pierre, Jean,Van der Geest,

Marian E.,Atbi, Abderrahmane,Fletcher,Nicholas J.

申请号：EP06004858.4申请日：20000922公开号：EP1672727A3公开日：20060628

摘要：Temperature dependent methods can be used to improve the cold startcapability of fuel cell electric power generation systems. A method of ceasing operationof an electric power generation system improves the cold start capability and freezetolerance of a fuel cell stack by reducing the amount of water remaining within thepassages of the stack. The method involves purging one or more of the fuel cell stackoxidant and fuel passages at shutdown prior to allowing the fuel cell stack to drop totemperatures below the freezing point of water. Preferably purging at shutdown isconducted at a temperature below the stack operating temperature. Another method,used at start-up, involves directing a coolant fluid stream to the fuel cell stack only aftera predetermined temperature above the freezing temperature of water is exceeded.Preferably, after freezing the fuel cell stack is heated to a temperature above its normaloperating temperature before operation is commenced.

申请人：BALLARD POWER SYSTEMS INC.

地址：9000 Glenlyon Parkway Burnaby, British Columbia V5J 5J9 CA

国籍：CA

代理机构：Beyer, Andreas

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