| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a system for detecting an isolation fault in a multi-stack fuel cell system. <P>SOLUTION: The system (30) is configured to determine the percentage of the voltage from each stack in the multi-stack that contributes to the voltage at a positive terminal (32) and a negative terminal (34) of the stack when a no-fault condition exists. The system then uses those percentages and the actually measured stack voltages to determine whether a fault condition exists. The actual voltage measurement at the positive terminal (32) is compared to the calculated voltage contribution from each stack at the positive terminal (32) in the no-fault condition. Also, the actual voltage measurement at the negative terminal (34) is compared to the calculated voltage contribution from each stack at the negative terminal (34) in the no-fault condition. If there is a significant difference between the calculated voltage for a no-fault condition and the calculated percentage of the actual voltage measurements, then a fault condition exists. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
