发明授权
- 专利标题: Control of nitrogen fraction in a flow shifting fuel cell system
- 专利标题(中): 控制流量转换燃料电池系统中的氮气分数
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申请号: US11612108申请日: 2006-12-18
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公开(公告)号: US07862948B2公开(公告)日: 2011-01-04
- 发明人: Sebastian Lienkamp , Peter Willimowski , David A. Arthur
- 申请人: Sebastian Lienkamp , Peter Willimowski , David A. Arthur
- 申请人地址: US MI Detroit
- 专利权人: GM Global Technology Operations, Inc.
- 当前专利权人: GM Global Technology Operations, Inc.
- 当前专利权人地址: US MI Detroit
- 代理机构: Dinsmore & Shohl LLP
- 主分类号: H01M8/04
- IPC分类号: H01M8/04
摘要:
A device and method to predict and regulate nitrogen concentration in a flow shifting system. In one aspect of the system, a bleed valve fluidly coupled to multiple fuel cell stacks is used to reduce the presence of nitrogen in an anode flowpath. One or more sensors can be used to measure voltage within one or both of the fuel cell stacks. By assessing fuel cell voltage changes within the anode flowpath and equating such changes with nitrogen fraction buildup, the system can manipulate the bleed valve at appropriate times to improve system operability. In one form of equating the sensed voltage changes with the nitrogen fraction buildup, a predictive algorithm can be used by a logic device in a controller to compare the sensed voltage so that the controller instructs the bleed valve when to open and close. In a variation, the controller can compare the sensed voltages against stored data rather than rely on a formula or related algorithm.