Protective circuits for secondary battery packs
US7701176B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2006 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | May 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00304
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention discloses a charging/discharging protective circuit for a secondary battery pack, having an over-charging/discharging voltage comparator, a reference voltage source and a battery status decision circuit. There is also a sampling circuit having a sequential pulse generator for generating pulses for selecting one of the batteries in the battery pack for testing purposes. The pulse generator provides M-channel gating pulses to the selection circuit of the battery under test and provides sampling pulses to the over-charging/discharging voltage comparators. The reference voltage source has a regulated output circuit. This invention uses time division inspection methods to provide a cost-effective solution for inspecting batteries in a battery pack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.