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voltage gauge drops while driving
It is normal for the voltage to drop when the vehicle is driving. In general, the battery voltage of automobile battery will drop to a certain extent during driving. The battery voltage of automobile is usually 12V or 24V. Generally, the battery voltage of domestic gasoline engine is 12V. The working principle of diesel engine is different from that of gasoline engine, so it needs higher voltage.
The main purpose of the starter is to provide the battery with shallow charge and discharge when the car is started. Therefore, the battery must be kept fully charged at all times in use, otherwise the service life of the battery will be greatly shortened. If the car stops driving for a long time, the battery will discharge itself and the voltage will gradually drop. Generally, it is difficult to start the car after stopping driving for about half a month; If you stop driving for more than three months, the battery will be completely discharged. If the battery connection is not disconnected, there are still electrical components working on the car.
For vehicles that have been stopped for a long time, it is best to disconnect all the connecting wires of the battery, and start it every ten days or so, running for more than half an hour each time, so that the generator can charge the battery to avoid too much reduction in the power of the battery, which can effectively prolong the service life of the battery.
Automobile circuit is composed of Generator + Battery + various electrical equipment. When the engine is off, only the battery supplies power to various electrical equipment. The battery voltage will slowly decrease with the increase of power consumption, so the voltage is not a constant value. After the engine is ignited, the generator starts to generate electricity and charge the battery at the same time. The voltage of the generator is generally slightly higher than that of the battery, but some power generation opportunities are related to the speed. When the speed is high, the voltage will be slightly higher, so the output of the generator is not necessarily a constant value.
When flameout, 12.7v is the battery voltage, which belongs to the normal range. When starting, the generator starts to work, and the voltage rises to about 14-14.5v. The generator supplies power to the on-board electrical appliances and charges the battery at the same time. However, during driving, if the battery is sufficient, the generator does not need to continuously provide a high voltage of more than 14V. If the battery is continuously charged, the circuit will reduce the generator voltage, Therefore, it will drop to about 12.5-13v, but when the car is idling, if the battery voltage decreases, the generator will increase the voltage to more than 14V to charge the battery. Therefore, this situation is normal. In addition, voltage is not the only standard to judge the trial life of batteries.
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