The Reasons for The Non Charging of Diesel Generator Batteries

Batteries are the main energy source in diesel generators. A well functioning and regularly charged battery will ensure that your diesel generator can start smoothly at any time of the year. So where do we get the charging, in other words, what charges the battery of the diesel generator?

The generator charges the battery

During the operation of diesel generators, the power generation device generates charging voltage, which is also the main resource for charging the battery pack. The charging process of the generator set battery should be carried out without damaging the environment, completely eliminating the possibility of electrolyte overflow in the tank.

What kind of charging should be carried out from the generator to the battery?

How much must the generator charge the battery to ensure the full operation of the generator? It is generally believed that a power generation device with a charging current equivalent to at least 10% of the capacity of the driver itself is sufficient to fully supplement the energy cost of the battery. In other words, for a 70 ampere/hour machine equipment, the power generation system must emit a charging current of at least 7 amperes, which will be the normal battery charging from the generator.

If a larger energy storage unit is used, the current generated during the operation of the autochanger may not be sufficient to fully recover energy consumption. This may lead to battery discharge and engine starting issues in the future. In addition, it is important to remember that the load of all electrical appliances equipped with the machine - the generator also has the ability to handle it.

How does a typical diesel generator operator check if the generator is charging the battery?

Dismantling ABC terminal - When a generator failure occurs, the engine immediately shuts down (only applicable to mechanical ignition systems).

Short circuit to ground in the positive terminal for a short time - spark check.

When diagnosing modern diesel generators, it is prohibited to use these methods - control units, fuses, or diode bridges fail instantly.

How to use a multimeter to check the charging status of a generator?

Monitor the operation of the power generation device and diagnose the current, voltage, and resistance values at least twice a year.

How to check if the battery is charged?

There are two methods to diagnose potential differences:

1. Directly on the generator winding. Through the battery unit, the energy generation source is directly connected to the large cross-sectional wire of the battery unit, which is inseparable.

2. Connect the instrument wires to the ABC terminals in any order and determine the network voltage, which should not be lower than 12V. In the case of complete power outage, when the motor is unloaded, the allowable voltage range is 13.5-14v. In this case, the deviation in the direction of decrease or increase may not exceed 0.2.

How long does it take for the battery to charge from the generator?

When the engine is running, the generator generates electricity to replenish energy in the battery. The charging duration depends on several criteria:

Environmental air temperature;

Remaining battery capacity;

Its service life;

Generate the charging current value of the source.

When the diesel generator operates correctly, the battery energy can be used to start the engine or ensure the operation of the electrical appliances when the engine is turned off. Therefore, when the engine is running, regardless of whether the machine is running or not, the drive will start charging to restore energy reserves.

Dingbo Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to sales@dieselgeneratortech.com we will pay highly attention on your question.