Battery cell state of charge balancing
US8614563B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 2011 |
| Grant date | Dec 24, 2013 |
| Priority date | — |
| Expiry date | Nov 27, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods and systems for balancing a state of charge of cell units of a battery pack of a vehicle are provided. Voltage sensors each measure a first value of state of charge of respective cell units at a first time, and a second value of state of charge of the respective cell units at a second time that is subsequent to the first time. A current sensor measures a current of the battery pack. A controller is coupled to the voltage sensors and the current sensor. The controller balances the state of charge around a predetermined calibrated value using the first values of state of charge, the second values of state of charge, and the current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.