How does the engine charge the battery?

The engine charging the battery has little to do with time, mainly related to the operation of the engine. When the engine is idling normally, the charging indicator goes out, then the generator starts to generate electricity. The higher the engine speed, the larger the power generation. After the generator's power generation meets the requirements of the vehicle electrical equipment, the rest will be Charge the battery.

The engine, AC motor, battery and electrical load on the car are an interconnected system. That is to say, when the engine is idling, depending on the power consumption of the car, the current generated by the generator can not charge the battery. However, it is guaranteed that the battery will not be used.

The energy balance on the car also needs to be considered. The restart of the engine must consider the state of charge of the battery. The battery can be regarded as an energy storage device to supply various loads. In turn, the alternator must charge the battery as it Energy provider. If the discharge capacity of the battery exceeds the charge, then the large-capacity battery will be discharged step by step until it is emptied, so many people say that the most ideal state is the balance between the energy input and output of the battery.

In fact, the charging indicator on the vehicle does not indicate whether the battery is charging or not, and it does not indicate at what speed the engine is charging. In the case of heavy load of the alternator, the charging indicator will also be extinguished, and the battery will not be charged but discharged. Also, please note that if the charging indicator does not go out at high speed, then the alternator, voltage regulator, line or drive belt has failed.

The battery is low-voltage direct current, and the charger is high-voltage alternating current. In order to charge the battery, it is necessary to change the high voltage to low voltage, and the alternating current is converted into direct current. This requires a buck and a rectifier inside the charger. The transformer converts 220 v to 12 v or 24 v. It is the principle of mutual inductance. The rectifier is the same as the generator, and the alternating current is converted into direct current. Therefore, there are transformers and rectifiers inside. This is the main component. Others have battery clips and fuses. There are ammeter voltmeters, adjustment switches, etc.

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