Method and system for voltage balancing of multiple rechargeable energy storage devices
US9525298B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2014 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | May 22, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00302
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system is provided for balancing voltage of two rechargeable energy storage devices connected in series at a common node. A voltage divider is configured to divide a total voltage across the two devices into first and second reference voltages. First and second circuit elements include, respectively: first and second comparators, first and second P-channel MOSFETs, first and second current limiting resistors, and first and second networks of resistors. The first circuit elements are in electrical communication and configured to actively discharge a first device of the two devices when a difference between a voltage at the common node and the first reference voltage is greater than a first predetermined voltage. The-second circuit elements are in electrical communication and configured to actively charge the first device when a difference between the voltage at the common node and the second reference voltage is less than a second predetermined voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.