Multiple battery switchover circuits
US5764032A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Mar 6, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0024
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Multiple battery switchover circuits for selective interconnecting any one of multiple batteries to a load or a charger while maintaining isolation with other batteries of the system. The present invention maintains the required isolation and interconnection capabilities using only three MOSFETs per battery instead of the four required by the prior art. The three MOSFETs for any one battery in the switchover circuit are connected with one current carrying connection in common, with the other current carrying connection of the MOSFETs being coupled to the charger, the load and a respective battery, respectively. Appropriate connection of the MOSFETs assures that as to any possible conduction path through two of the three MOSFETs, one of the MOSFETs has its parasitic diode back biased. Alternate embodiments are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.