In the process of vehicle driving, the automobile generator supplies power to the battery, and the battery voltage will be large and small. Is this normal? What are the causes? What is the normal value of battery voltage? With these questions, SADC electric Hu Gong will answer for you.

What is the normal value of battery voltage

The no-load voltage of automobile battery is about 13V, and the load voltage is more than 11V. When the load voltage is lower than the load voltage, the engine may not start or start very difficult.

After starting, the car generator starts to generate electricity. The battery voltage of 12V train should be in the middle of 13.5v-14.5v, and the battery voltage of 24V train should be maintained between 27-29v.

Automobile generator to battery power supply voltage will be big, small, normal?

Automobile circuit is composed of automobile generator, battery and various electrical equipment

1. When the engine is off:

The battery provides power to the car, and the battery voltage will increase with the power consumption in the car (listening to songs, charging mobile phones, etc.), and the voltage will slowly decrease at this time;

2. When the engine is running (at idle speed)

The generator starts to generate electricity and charges the battery. The power generation voltage of the car is generally higher than that of the battery;

3. When the engine is running (the relationship between the engine speed and the driving and refueling conditions)

The higher the speed, the higher the voltage. The voltage of the battery is not always constant.

To sum up, it is normal for the vehicle generator to supply power to the battery for a long time, and it is a normal phenomenon for the battery voltage to be in the range of 13.5v-14.5v during driving, so the car owner can use it without worry.