Method and system for charge equalization of lithium-ion batteries
US6377024B1 · kind B1 · utility
53Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2001 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Mar 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0018
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system (10) and method (100) for charge and discharge equalization of a lithium-ion battery having a plurality of cells (12) in series. A central charge controller (16) and a central discharge controller (22) command a rate of charge to individual charge controllers (14) associated with each cell (12) of the battery for maintaining equalized charge at each cell (12) of the battery. The charging and discharging is initiated upon sensing a predetermined maximum charge threshold voltage (104) and a predetermined minimum discharge threshold voltage (114) at each cell in the series of cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.