Charge switch control circuit
US6380763B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Apr 12, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge control circuit which prevents charging of a battery when a charger is connected to the battery when the voltage of the battery is not above a threshold voltage of a MOS inverter circuit. Under such a condition, a charge control switch is turned off and charging current is cut off so that charging of the abnormal battery is inhibited and destruction or explosion of the battery is prevented. First and second circuits monitor the battery voltage, the second circuit having for comparing the battery voltage to a threshold voltage of a MOS transistor, and a logic circuit performs a logic operation on the outputs of the two circuits so that charging of the battery is prevented when the battery voltage is not higher than the threshold voltage of the MOS transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.