Fuel cell anomaly detection method and apparatus
US6953630B2 · kind B2 · utility
34Cited by
67References
32Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2001 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Dec 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A respective bipolar junction transistor is coupled across pairs of fuel cells in a fuel cell stack to monitor the voltage across each fuel cell pairs for a drop in voltage below a threshold voltage. A respective optoisolator coupled to each of the transistors produces a digital signal corresponding to the status of the respective pair of fuel cells. An “AND” circuit produces a single digital signal corresponding to the status of one or more pairs of fuel cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.