Systems and methods for multi-mode battery charging
US8004248B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2007 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | May 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Various systems and methods for battery charging are disclosed herein. As just one example, a battery charger is disclosed that includes a current feedback loop that has a pulse width modulated current control output, and a voltage feedback loop that has a pulse width modulated voltage control output. In addition, the battery charger includes a transition circuit with a digital phase/frequency detector. The digital phase/frequency detector is operable to detect a duty cycle difference between the pulse width modulated current control output and the pulse width modulated voltage control output. Further, the transition circuit is operable to transition between application of a substantially current charge control to a charging node to application of a substantially constant voltage to the charging node based at least in part on the difference in duty cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.