1⃣️The engine transmission wheel belt of the car is connected to the generator, as long as the engine starts, the generator will rotate with it, and the relevant speed must be reached in order to send out a standard output suitable for battery charging. Just like the crank phone, the slow shaking voltage is low, and the engine can also reduce the speed when the throttle is small, so the output of the generator can not reach the charging power.
2⃣️ The generator outputs AC low voltage, and then the output charging voltage is 1.2 times that of the battery 12V after rectifying and stabilizing, when the battery is started and consumed, it will be supplemented in the drive, if you turn on the DC electrical equipment on the car, the generator will supply electricity while charging, just like the mobile phone is used while charging, and when the battery is fully charged, the virtual voltage of 14.4V is balanced with the charger, the generator only supplies the electrical appliances on the car, and the battery will not be charged.
3⃣️ If you park and use electrical appliances with large power consumption, once the battery is old, the current power supply will be insufficient and the pressure reduction cannot start the engine when starting the ignition, so the protection of the car battery is something that the driver should pay great attention to, some people want to cook in the car, turn on the headlights, turn on the air conditioner, turn on the stereo and use electrical equipment while charging while driving!
Thank you!