Fuel cell system
US6670063B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2000 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Sep 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S429/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In the fuel cell (FC) system comprising a FC and a rechargeable battery, a demand power of the FC is calculated by subtracting the charge power to the battery from a demand power signal which indicates the demand value of a load current and using the result. Accordingly, the charge current is never supplied to the battery which is charged to the maximum ratio, which prevents the utilization ratio of the fuel cell from decreasing and which prevents the battery from overcharge. On the other hand, the battery which is discharged to the minimum ratio does not output the discharge power but the charge power is supplied to the battery. Accordingly, it prevents the battery from over discharge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.