Patent ID: 9312715
Filing Date: 2016-04-12
CPC Classification: H02J

Claim Text:
1. An electronic device comprising: a main system; a battery; a power button connected to the battery; a battery device power protection and reset circuit comprising: a switch device connected to the main system and the battery; and a charging circuit connected to the power button and configured for turning off the switch device when operating under a first trigger mode, so that the switch device electrically isolates the main system from the battery, wherein after the main system is electrically isolated from the battery, the charging circuit turns on the switch device when operating under a second trigger mode, so that the switch device electrically connects the main system to the battery, wherein when the power button is pressed over a predetermined period, the charging circuit operates under the first trigger mode and is charged by the battery, and a charging voltage of the charging circuit turns off the switch device, wherein after the main system is electrically isolated from the battery, when the power button is pressed again but duration of pressing the power button is shorter than the predetermined period, the charging circuit operates under the second trigger made to turn on the switch device, wherein the power button has a first terminal electrically coupled with the battery and a second terminal electrically coupled with the charging circuit, the first and second terminals are electrically connected to each other when the power button is pressed, and the first and second terminals are electrically isolated from each other when the power button is not pressed, wherein the charging circuit comprises a resistor and a charging capacitor, the resistor is connected to the second terminal of the power button, a first terminal of the charging capacitor is connected to the resistor, and a second terminal of the charging capacitor is grounded; when the first terminal and the second terminal of the power button are electrically connected to each other, the charging capacitor is charged; the predetermined period depends on a resistance of the resistor and a capacitance of the charging capacitor.