System and method for balancing cells in a battery pack with selected external and internal bypass paths
US7821229B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2008 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Dec 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0016
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for cell balancing with smart low-voltage control circuit. The cell balancing system comprises a plurality of battery cells, an external bypass path for each cell, an internal bypass path for each cell, an input terminal receiving an enable signal for each cell, an input terminal receiving a selection signal, and a cell balancing unit for generating a configuration signal to conduct the external bypass path or internal bypass path. The enable signal is configured to enable a bypass current of each cell, and the selection signal is configured to select the external bypass path or internal bypass path. The cell balancing unit is employed to receive signals from input terminals, and generate a configuration signal to control the conductance of external bypass paths or internal bypass paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.