Procedures for shutting down fuel cell system by using air purge at low cell temperature
US7270904B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2004 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Mar 2, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fuel cell system that employs a procedure for delaying an air purge of a fuel cell stack at system shut-down until the temperature of the stack is reduced below a predetermined temperature. The fuel cell stack includes an anode side, a cathode side, an anode input, a cathode input and an anode exhaust. The system includes a temperature sensor for monitoring the temperature of a cooling fluid flowing through the stack. The anode side of the fuel cell stack is purged at the stack shut-down by directing air from the cathode input line to the anode input line after the temperature of the cooling fluid is reduced to a predetermined temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.