Rechargeable battery protection circuit with alarm unit
US6727678B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Jun 13, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00304
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rechargeable-battery protection circuit with alarm unit is proposed, which is designed for use with an electronic system with a rechargeable battery unit, such as a notebook computer with a lithium-type of rechargeable battery unit, for protecting the rechargeable battery unit against over voltage/current. The proposed rechargeable-battery protection circuit is characterized by the provision of an alarm unit which is capable of generating a human-perceivable alarm, such as an audible sound alarm, to alert the user to take necessary manual actions to protect the rechargeable battery unit against the over voltage/current when the built-in protective operation fails to work properly. This allows the rechargeable battery unit to be more reliably protected than the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.