the car is connected to the car computer and electronic equipment by setting the USB interface. The setting of the USB charger makes it more convenient for the mobile phone to charge when the car is running. The USB charger provides power through the USB interface. Usb interface can charge all electronic equipment and other electrical appliances with standard interface, which is convenient for people's life, light in weight and easy to carry.
at present, mobile phones, tablets and other electronic devices are equipped with USB chargers, and charging can be started by connecting the data cable as the power cord and the USB interface. By using usb interface, cars can be charged and played music. USB audio is a 5V power supply with USB interface, and there are no other requirements. Because the voltage of electric cars is basically 48V or 72V, and the single battery is 12V, it is suggested to use four rechargeable batteries in series and add a 5V voltage stabilizing circuit, so as to get a separate power supply to answer the constraints of electric cars.