1. Fault phenomenon
¢Ù Firstly, check if the circuit connection is in good contact, carefully check if there is any "spark" or arcing phenomenon between the socket and plug, and if there is any line damage or disconnection.
¢Ú Check if the charger is damaged and if the charging parameters meet the requirements: the initial charging current reaches 1.6-2.5A/unit; The maximum charging voltage reaches 14.8-14.9V/unit, the floating charging conversion current reaches 0.3-0.4A/unit, and the floating charging voltage reaches 14.0-14.4V/unit.
¢Û Check if there is any drying phenomenon inside the battery, that is, if the battery is severely out of liquid.
¢Ü The plates should also be checked for sulfurization. The irreversible sulfation of the electrode plate can be preliminarily determined by QN-1000 (usually with discharge detection below 6V) and then tested with a capacity detector. If the discharge time does not reach 50% of the specified capacity, irreversible sulfation generally occurs. In addition, during charging, the voltage of the battery rises very quickly, with some single cell voltages being particularly high, much exceeding the normal value; When discharging, the voltage drops very quickly, and the battery has no or very little storage. If the above situation occurs, it can be determined that the battery has undergone irreversible sulfation.
2. Fault inspection and handling
Connect all parts of the circuit firmly, and replace the charger if it is abnormal. If the battery cell is dry, pure water should be added for pulse repair.
It is better to control the voltage of all three batteries in the group to be above 13.4V/battery. If the voltage difference between batteries exceeds 0.3V, sulfurization will continue to occur during use due to asynchrony. So it is important to pay special attention to the battery matching issues after repair (especially for users of electric friction batteries). If they need to be replaced, they must be replaced!
