Manson Engineering Industrial CBC-9120 Operation Manual page 8

The 6 Stage Charging Algorithms for Lead Acid Battery
There are two separate charging algorithms:
one for lead acid based and one for Lithium FePo4.
Lead acid based batteries ; wet , sealed , AGM
6 Stages: Soft Start--> Bulk --> Absorption ---> Float --> Standby --->
Refresh Cycle
This 6-Stage charger will give a fast and safe charging according to the state of
your battery, saves energy, and automatically refresh your battery.
Soft Start:
When battery voltage is less than 12V, charger will lower the initial charging
current to 10 Amp to avoid heating up and stress on the battery until battery
voltage rises to 12.4V then switches to normal Bulk Charge.
Bulk Charge:
This stage will give about 80% of the total charge to the battery. Charger is held
in giving out a constant charging current of 20Amp to the battery. Voltage
increases as the charging goes on bulk charge mode giving a steady 20Amp
current to the battery and the temperature of the battery increases as well.
Absorption Charge:
This will give the remaining 20% charge to the battery. When the battery
voltage rises to the voltage level of the selected battery type, the charging
switches to Constant voltage charging. The absorption time is adaptive to the
time spent on bulk charge and the battery type.
The absorption time is also is bounded by a set of upper and lower time limits.
Float Charge:
A low constant voltage charge to top up the battery for slight self discharge or
light occasional loading in order to keep the battery in a fully charged condition
all the time.
Standby Charge:
The charger will enter into an energy conversation (Standby) stage with lower
Float Voltage after long period of inactivity of 8 hours or more has been
detected. This Standby stage also helps to reduce grid corrosion. This will
decrease the gassing and corrosion to the positive terminal.
Refresh Charge
Charger will automatically give a refreshing cycle charge (fast bulk &
absorption, float) at 7 days interval of inactivity. This is to keep the electrolyte
and the cells of the lead acid battery in good working condition.
P.6