BAC06S SOLAR BATTERY CHARGER USER MANUAL
BAC06S Solar Battery Charger Version 1.0 2017-07-20 Page 6 of 19
4. CHARGING PRINCIPLE
Three-stage Method
Charging is performed according to the battery charging characteristics using three-stage method.
a) The first sta
ge is named as „constant current‟: a): Trickle Charge: when the battery terminal
voltage is relatively low, then the charging current is low likewise which can prevent the battery
temperature is too high. b): Quick Charge: When the battery terminal voltage is relatively high,
the charging current will rise to rated value. Large current charging operation leads
to an increase in the electricity quantity of the battery.
b) The second stage is named as Absorption Charge: after the first stage, the battery voltage is rise
to absorption charge value rapidly, and the charger voltage will keep constant. The battery
terminal voltage will stabilize in the absorption charge value with the decreasing of charging
current.
c) The third stage is named as Float Charge: After the above two stage, the charge is basically
completed and the Float Charge is started automatically. In this stage, the charger voltage
reduces to float voltage and the charger current reduces to float value. After that charging current
will only neutralize the battery self-discharge. Even long-term charging cannot harm the battery,
as charger can keep the battery fully charged and so guarantee long lifetime of the battery.
