Protection methods, protection circuits and protective devices for secondary batteries, a power tool, charger and battery pack adapted to provide protection against fault conditions in the battery pack
US7508171B2 · kind B2 · utility
88Cited by
5References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2004 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Feb 25, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a cordless power tool system, protection methods, circuits and devices are provided to protect against fault conditions within a battery pack that is operatively attached to a power tool or charger, so as to prevent internal or external damage to the battery pack or attached tool or charger. The exemplary methods, circuits and devices address fault conditions such as over-charge, over-discharge, over-current, over-temperature, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.