Analysis of the reasons why the battery can not be charged
July 26, 2023
When the charger is working normally, the battery is charged for a long time and the voltage rises very slowly. The reasons are as follows:
The wiring head is loose or rusted in the charging circuit, which increases the resistance and reduces the current intensity.
The battery plates are vulcanized with a layer of white aluminum sulfate grains with poor conductivity. When such coarse grains block the pores of the plates, the electrolyte is difficult to penetrate, resulting in an increase in internal resistance and a failure in current flow.
The battery plate is damaged due to the large current charging or discharging the battery, the excessive gravity of the electrolyte or the insufficient liquid level. When diagnosing, first check whether the terminals are loose or rusted, and then judge whether the plates are vulcanized according to the phenomenon during charging. If the temperature of the electrolyte rises rapidly during charging, or the charging time is not long, the electrolyte will generate a large amount of bubbles, but the voltage does not increase, and the specific gravity of the electrolyte does not increase significantly, indicating that the plate has been vulcanized. When the vulcanization is not serious, all the electrolyte can be poured out, distilled water is injected, and then charged for a long time with a small current of about 2 amps to dissolve the aluminum sulfate, but care should be taken not to raise the temperature of the battery. When the specific gravity of the electrolyte does not increase within a few hours, it indicates that the battery is fully charged and then discharged. After repeated charge and discharge cycles, after the active substance is restored, if it is still not normal, the new product should be replaced.
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