This article briefly introduces the motor, energy converter, electronic controller and the battery of the electrical driving system of electric vehicle and tells the charging ways of its battery.

Through CAN bus and CAN bus interface converter, the electricity checks meter system conveys remotely users' realtime electric data to the computer and the computer realizes charging and controlling.

The invention is used for regulating the time for charging the capacitor, further adjusts the maximum duty cycle of the reset signal and improves the output ripple of the buck converter.