In the general diesel generator set, the battery is the power supply equipment for the starter motor to run. When the diesel generator is started, the battery is required to supply low voltage and high current to the starter in a short time. After the diesel generator is working, the generator can supply power to the electrical equipment and at the same time supply power to the battery. When the diesel generator is at low speed or stopped, the output voltage of the generator is insufficient or stops working, and the battery can supply the required current to the electrical equipment of the diesel generator.
The lead-acid batteries we commonly use in general diesel generator sets are mainly divided into two types, namely dry-charged batteries and maintenance-free batteries.
1) Dry-charged battery: Its full name is the dry-charged lead-acid battery. Just add electrolytes and wait 20-30 minutes before use. Its main advantages are stable voltage and low price; its disadvantages are low specific energy (that is, the electric energy stored per kilogram of battery), short service life, and frequent daily maintenance.
2) Maintenance-free battery: Due to its own structural advantages, the maintenance-free battery consumes very little electrolyte, and basically does not need to replenish distilled water within its service life. It also has the characteristics of shock resistance, high-temperature resistance, small size, and small self-discharge. The service life is generally twice that of ordinary batteries. There are also two types of maintenance-free batteries on the market: the first type requires no maintenance (adding supplementary liquid) after adding electrolyte at the time of purchase; the other type is that the battery itself has been filled with electrolyte and sealed when it leaves the factory. , the user cannot add a refill at all.
There are 2.4 volts, 4 volts, 6 volts, 8 volts, 12 volts, and 24 volts series of lead-acid batteries, with capacities ranging from 200 mAh to 3000 mAh. Generally, diesel generator sets use 12V or 24V batteries to start.