BAC150CAN Battery Charger User Manual
BAC150CAN Battery Charger Version 1.0 2019-03-05 Page 5 of 13
3 CHARGING PRINCIPLE
Fig. 1 3-Stage Charging Curve Gragh
Three-stage charging method is applied for the charger to work according to the battery charging
characteristics.
1) The first stage is
‘Constant Current’ mode. When the terminal voltage is comparatively low, the
charging current is small, which effectively prevents the battery from damaging because of high
temperature, calling
‘low voltage trickle charging’. When the terminal voltage gets high, the
charging current changes to rated current, which makes the battery electricity increasing rapidly.
This process is
‘quick charging’.
2) The second stage is
‘Even Charging’ mode. After constant current mode, the voltage gets up to
the even voltage value, and at this time the charger keeps constant voltage output. The charging
current slows down, and the terminal voltage also slowly keeps at the value of even voltage.
3) The third stage is
‘Float Charging’ mode. After the above two stages, the charging is basically
completed and output voltage of the charger switches to float voltage automatically. Charging
current also drops to float current. All white LED indicators are illuminated always. Afterwards the
charging current only offsets the battery self-discharge and longtime charging is unharmful for the
battery.
