5
1 PRODUCT
FUNCTION
1.3.3 Charging
Process
A, B or C Profi les
When the Charger is turned on, it will move into the
Boost
stage. The
Boost
stage
maintains a constant current until the battery voltage reaches its Absorption Voltage.
The current in
Boost
stage may vary during operation in order to maintain safe
operating temperature, or to limit the difference between input and output voltages.
The Charger will then move to
Absorption
stage which maintains a constant voltage
level for a predetermined period of time or until the current being drawn by the
output battery drops to less than 4A for 30 seconds; after which the Charger will
enter
Float
stage.
Float
stage maintains 13.3V on the output battery, keeping the battery topped up.
This counteracts the battery’s self discharging or loads applied to the battery. When
the battery loses charge, the Charger will move back into the
Boost
stage.
Li Profi le
When the Charger is turned on, it will move into the
Constant Current
stage. This
stage maintains a constant current until the battery voltage reaches its set point. The
current may vary during operation in order to maintain safe operating temperature,
or to limit the difference between input and output voltage.
The Charger will then move to
Constant Voltage
stage. This stage maintains 14.5V
on the output battery, keeping the battery topped up. This stage also counteracts
the battery’s self discharging. When a load applied to the battery causes it to lose
charge, the Charger will move back into the
Constant Current
stage.
When using the Battery Charger to charge a Lithium Iron Phosphate battery, only
batteries that feature an inbuilt battery management system featuring inbuilt under and
over voltage protection and cell balancing are suitable.
Voltage A, B or C
Float
Absorption
Boost
Current
Charging Process
Voltage Li
Constant Current
Constant Voltage
Figure 1.3.3.1 - Charging Process
