Electromagnetically coupled battery charger
US4031449A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Nov 20, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/29
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solid state electronic battery charger which is electromagnetically coupled to one or more batteries. A charging circuit energizes a drive winding to produce an alternating field received by an associated coupler and operative to convey charging current to a battery connected thereto. A sense winding monitors the level of the alternating field to derive a signal representative of the battery charge level and which causes a tapered charge to be supplied to the battery and an indication of a sensed fully charged state. A proximity sensor can be provided to denote the presence of a coupled battery and by which charging operation is commenced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.