Patent ID: 8390254

Claim:
A charging apparatus for laptop computer with multi-battery, the charging apparatus used for a first battery unit and a second battery unit and comprising: a micro controller unit; a first charging switch unit electrically connected to the micro controller unit, which further comprises: a first charging switch subunit electrically connected to the charging unit; a second charging switch subunit electrically connected to the first charging switch subunit and the micro controller unit; a third charging switch subunit electrically connected to the first charging switch subunit and the first battery unit; a fourth charging switch subunit electrically connected to the third charging switch subunit and the micro controller unit, a first charging diode electrically connected to the first charging switch subunit; a second charging diode electrically connected to the third charging switch subunit; a first charging resistor electrically connected to the first charging switch subunit; and a second charging resistor electrically connected to the third charging switch subunit; a second charging switch unit electrically connected to the micro controller unit, which further comprises: a fifth charging switch subunit electrically connected to the charging unit; a sixth charging switch subunit electrically connected to the fifth charging switch subunit and the micro controller unit; a seventh charging switch subunit electrically connected to the fifth charging switch subunit and the second battery unit; and an eighth charging switch subunit electrically connected to the seventh charging switch subunit and the micro controller unit; a third charging diode electrically connected to the fifth charging switch subunit; a fourth charging diode electrically connected to the seventh charging switch subunit; a third charging resistor electrically connected to the fifth charging switch subunit; a fourth charging resistor electrically connected to the seventh charging switch subunit; a first charging capacitor electrically connected to the fifth charging switch subunit; and a second charging capacitor electrically connected to the fifth charging switch subunit; a first discharging switch unit electrically connected to the micro controller unit; a second discharging switch unit electrically connected to the micro controller unit; a charging unit electrically connected to the first charging switch unit and the second charging switch unit; and a system main power unit electrically connected to the first discharging switch unit and the second discharging switch unit, wherein, the micro controller unit controls the charging unit charging the first battery unit and the second battery unit via controlling the first charging switch unit and the second charging switch unit, wherein the micro controller unit controls the first battery unit and the second battery unit to discharge to the system main power unit via controlling the first discharging switch unit and the second discharging switch unit.