发明授权
US07998631B2 Method to reduce/eliminate shunt current corrosion of wet end plate in PEM fuel cells
有权
减少/消除PEM燃料电池中湿端板分流电流腐蚀的方法
- 专利标题: Method to reduce/eliminate shunt current corrosion of wet end plate in PEM fuel cells
- 专利标题(中): 减少/消除PEM燃料电池中湿端板分流电流腐蚀的方法
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申请号: US12401351申请日: 2009-03-10
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公开(公告)号: US07998631B2公开(公告)日: 2011-08-16
- 发明人: Mahmoud H. Abd Elhamid , Youssef M. Mikhail , Gayatri Vyas Dadheech
- 申请人: Mahmoud H. Abd Elhamid , Youssef M. Mikhail , Gayatri Vyas Dadheech
- 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: Brooks Kushman P.C.
- 主分类号: H01M8/04
- IPC分类号: H01M8/04 ; H01M8/24 ; H01M2/38 ; H01M2/40
摘要:
A fuel cell stack includes a first fuel cell assembly and a last fuel cell assembly. The first fuel cell assembly includes a first end plate assembly, which has a first end plate cooling channel adapted to receive a coolant. The last fuel cell assembly includes a last end plate assembly that has a last end plate cooling channel. A first electrical potential exists between the first end plate and the last end plate. The fuel cell stack also includes a connecting cooling channel is in fluid communication with the first end plate cooling channel and the last end plate cooling channel. A coolant is contained within the connecting coolant channel, the first end plate cooling channel, and a last end plate cooling channel. The fuel cell stack further includes a coolant electrode positioned in the coolant channel, which contacts the coolant. A voltage source is in communication with the first end plate and the coolant electrode such that a second electrical potential between the coolant electrode and the first end plate is at a sufficient voltage to impede corrosion of the first end plate.