Check the charging circuit.
First of all, check whether the connection of the charging circuit is reliable, check whether the connecting wire is in good contact with the plug, and carefully check whether the socket and plug are "glowing" and arcing, and whether the wireless circuit is damaged or disconnected.
Check the charger.
Check whether the charger is damaged and whether the charging parameters meet the requirements.
Look inside the battery
Finally, check whether the battery is dry, that is, the battery is seriously short of liquid.
Check the polar plate
It is also necessary to check whether the electrode plate has irreversible sulfation: the irreversible sulfation of the electrode plate can be judged by measuring the change of its terminal voltage after overcharge and discharge.
Fault handling
Treatment of the above faults: first connect the charging circuit firmly, and replace the charger if there is any abnormality. Dry batteries should be supplemented with pure water or 1.050 sulfuric acid for maintenance, charging and discharging.
equalized charging
If irreversible sulfation is found, it should be charged evenly. The maintenance and charging of the dry battery after adding liquid should be controlled within the maximum battery 1.8A 10 ~ 15 hours, and the voltage of three batteries is about 13.4V/ battery.
Elimination of irreversible sulfation
After the irreversible sulfated battery is replenished (the flowing electrolyte just appears), it is charged at a current of 0.05-0. 15C2A for about 20 hours, and then discharged at a current of 1.5A, and the discharge termination voltage is 10.5V/ battery, and it is repeated for 1-3 times until irreversible sulfuric acid is obtained.
Specialized technical training
After the lead-acid battery is repaired, the technical maintenance personnel of users should be trained free of charge to ensure the safe and reliable use of users.