What are the functions of automobile batteries?

When the car starts, the battery provides power for the starting motor, ignition system, electronic fuel injection and lighting. After the starter motor gets power, it starts to rotate, driving the engine to rotate together. At the same time, the ignition system ignites the gasoline in the cylinder, and the gasoline burns and explodes to do work for the engine, which is the start of the battery. When the engine starts normally, the starting motor of the starting circuit is automatically disconnected, and the engine begins to provide power for the air conditioning compressor, vehicle running and power generation system on the vehicle. After the power generation system receives power, it begins to replace the battery to provide power for the ignition system and EFI on the vehicle, to provide power for all electrical equipment such as lights, speakers, DVD and headlights on the vehicle, and to replenish power for the battery. When the engine is at low speed or idle speed, if the output power of the power generation system cannot fully meet the power demand of the on-board electrical equipment, the storage battery will assist the power generation system to supplement the electrical energy for the electrical equipment, and stabilize the voltage of the electrical equipment while supplementing the electrical energy. This is the charging and voltage stabilizing function of the battery. If the engine is not running, the power supply of all electrical appliances in the car is provided by the battery. Of course, this situation should be avoided as much as possible.