发明授权
US08420271B2 Method to improve reliability of a fuel cell system using low performance cell detection at low power operation
有权
在低功率运行时提高使用低性能电池检测的燃料电池系统的可靠性的方法
- 专利标题： Method to improve reliability of a fuel cell system using low performance cell detection at low power operation
- 专利标题（中）： 在低功率运行时提高使用低性能电池检测的燃料电池系统的可靠性的方法
-
申请号： US12502961申请日： 2009-07-14
-
公开(公告)号： US08420271B2公开(公告)日： 2013-04-16
- 发明人: Tayoung Choi , Sriram Ganapathy , Jaehak Jung , David R. Savage , Balasubramanian Lakshmanan , Pamela M. Vecasey
- 申请人： Tayoung Choi , Sriram Ganapathy , Jaehak Jung , David R. Savage , Balasubramanian Lakshmanan , Pamela M. Vecasey
- 申请人地址： US MI Detroit
- 专利权人： GM GLobal Technology Operations LLC
- 当前专利权人： GM GLobal Technology Operations LLC
- 当前专利权人地址： US MI Detroit
- 代理机构： Miller IP Group, PLC
- 代理商 John A. Miller
- 主分类号： H01M8/04
- IPC分类号： H01M8/04 ; H01M8/24
摘要：
A system and method for detecting a low performing cell in a fuel cell stack using measured cell voltages. The method includes determining that the fuel cell stack is running, the stack coolant temperature is above a certain temperature and the stack current density is within a relatively low power range. The method further includes calculating the average cell voltage, and determining whether the difference between the average cell voltage and the minimum cell voltage is greater than a predetermined threshold. If the difference between the average cell voltage and the minimum cell voltage is greater than the predetermined threshold and the minimum cell voltage is less than another predetermined threshold, then the method increments a low performing cell timer. A ratio of the low performing cell timer and a system run timer is calculated to identify a low performing cell.