Online detection of stack crossover rate for adaptive hydrogen bleed strategy
US7544430B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2006 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Dec 7, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for determining when to provide an anode exhaust gas bleed from a fuel cell stack as the fuel cell stack ages. The method determines the amount of nitrogen flowing from a cathode side to an anode side of the fuel cell stack. The method also determines the amount of nitrogen flowing from the anode side to the cathode side by determining a standard deviation of voltage outputs of the fuel cells, and using the standard deviation as a model for determining the leak rate of nitrogen from the anode side to the cathode side. The method determines the concentration of nitrogen in the anode side based on the nitrogen flow between the cathode and anode side, and opens a bleed valve to bleed the anode exhaust gas if the concentration of nitrogen in the anode side goes above a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.