Pulse-charge battery charger
US5633574A · kind A · utility
Inventor
Key dates
| Filing date | Jan 18, 1994 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Jan 18, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/19
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This pulse-charge battery charger charges Nickel-Cadmium and Nickel-metal hydride batteries having one or more cells and used with cellular telephones and camcorders. A battery is lowered into a finger accessible receiving volume and held by a magnetic force. Charging automatically commences and automatically stops, as controlled by utilizing a U1 controller and other combined circuits. Charging status is indicated by colored lights: yellow--charging; green--battery is charged; orange--battery is overheated and cooling; and red--battery is defective. Other combined circuits are: power supply circuit to receive either 12.6 volt AC or DC voltage power, and to produce both a full wave rectified unregulated DC volt power source, and a regulated 5 DC volt power source; battery installed detector circuit; a reset circuit; a timing control circuit; ready light circuit; no battery then no light circuit; over temperature detection circuit; normalize circuit to accommodate battery cell arrangements; constant current source circuit; discharge control circuit; thermistor sensor control circuit; battery being charged circuit operating when a battery has an internal temperature sensor; and a bat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.