Deep under voltage recovery in a battery pack
US7605568B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 10, 2006 |
| Grant date | Oct 20, 2009 |
| Priority date | — |
| Expiry date | Mar 11, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0069
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In one implementation, a method for charging a battery system is provided. The method includes enabling determining if a charger is coupled to a battery system, the battery system including one or more cells and a charge enable transistor. The method also includes enabling determining if a voltage level of the cells is less than a predetermined first low voltage level. If the voltage level of the cells is less than the predetermined first low voltage level, enabling charging of the cells at a reduced rate including adjusting a voltage applied to the charge transistor gate terminal to regulate a voltage seen by the charger to a level that is less than a predetermined second voltage level. Additionally, when the voltage of the cells reaches the predetermined first low voltage level, the method includes substantially fully enabling the charge transistor to allow for charging at full rate by the charger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.