Dual battery switch circuit
US5316868A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Jul 21, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dual-battery switch circuit associated with a load is provided. The switch circuit includes a primary battery, a secondary battery, a circuit disposed to apply energy from the primary battery to the load, and a controller which disposed to sense attempts to apply energy to the load. The controller is configured to couple the secondary battery to the primary battery with respect to the load when a predetermined number of attempts to apply energy to the load occur within a predetermined time period after a first attempt. Alternatively, a controller is provided which couples the secondary battery to the primary battery with respect to the load when an attempt is made to apply energy to the load and the temperature is below a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.