With the increase of mobile appliance and motor products, lead acid batteries were commonly used. Now a reliable and useful lead acid battery charger was introduced in the article. It can be used for 1 ~ 3 tons of electric lift hydraulic forklift.

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    This lead acid battery charger is a traditional transformer type and the charging current can be adjusted by adjusting the primary and secondary turns ratio of the transformer. Voltage detection used LM393P. The charger has a function that positive and negative anti-wiring and lead acid battery damage refusal function, the charger charging process is as follows:

    In the situation that lead acid battery terminal voltage is not less than 10 volts, connecting the lead acid battery charger, turning on the power switch, the output relay ZJD switches on, the primary turns ratio relay ZJ2 switches on, light-emitting diode DF1 lightens, lead acid battery was into a fast charge stage, the charging current will instantly be greater than 1 / 10C lead acid battery standard charging current. With the lead-acid battery terminal voltage rising, the charging current would be quickly closed to the standard charge current of 1 / 10C, when the lead acid battery terminal voltage rose to 12.5 volts, the primary turns than the relay ZJ2 release, ZJ1 switches on, light-emitting diodes DF2 lightens, DF1 off, lead acid battery was into a normal charging stage, the charging current is less than 1 / 10C lead acid battery standard charging current. When the lead acid battery terminal voltage rises to 14.5V, the primary turns ratio relay ZJ1 release, light-emitting diode DF3 lightens, DF2 extinguished, lead acid battery was into a floating charging stage, floating charge lasting for 1 to 2 hours, turn off the power switch, output relay ZJD wsa released, the charging process finished.

    Anti-wiring positive and negative reverse function: Achieved by D1, D8, DF4, lead acid batteries’ and chargers’ wiring is reversed, D1, D8 reverse, circuit board does not work, ZJD does not switches on, light-emitting diode DF4 lightens.

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