Method and system for cell equalization with isolated charging sources
US7928691B2 · kind B2 · utility
15Cited by
42References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2005 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Oct 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0018
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for charging a rechargeable, or secondary, battery including a series string of battery cells, a topology of charging sources that selectively provides charging current to battery cells that need to be charged, but avoids overcharging battery cells that are already charged above a predetermined voltage threshold. Based on individual cell voltage measurements, the charging current is controlled in a manner to direct charging current to the battery cell(s) needing charge until these cells are fully charged, and bypasses battery cells that are fully charged or become fully charged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.