Battery protection circuit
US7541777B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2006 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Apr 6, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00304
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery protection circuit includes an abnormal condition detection circuit having a resistor through which a current flows from a load in response to a current flowing in the load. The resistor generates a voltage in response to the current flowing in the load. The battery protection circuit further includes a control circuit having a detection stop switch configured to control the current flowing in the resistor from the load. The control circuit turns off the detection stop switch and a protection switch connected between the battery and the load when the abnormal condition detection circuit detects the abnormal condition according to the voltage generated by the resistor. The control circuit returns the detection stop switch to an ON state after returning the protection switch to an ON state in response to a start of supplying power from the battery to the battery protection circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.