Voltage profile charge control system
US6268715A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2000 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Apr 29, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention is a battery charging system that charges rechargeable battery cells by tracking a voltage profile charging curve across time. As all lithium based, like voltage cells have the same voltage profile across time, regardless of capacity, the invention presents a preferred embodiment of a universal charger capable of charging lithium batteries of varying capacities. Current is treated as a variable dependent upon voltage. Thus, in a preferred embodiment, cells of varying capacities will be charged at an optimal rate, thereby optimizing battery performance. One embodiment uses frequency selection to vary the rate of change in the output voltage of the system, thereby tracking the voltage profile charging curve across time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.