6 Charging characteristic
Battery charging is fully automatic and micro-processor controlled with a 3-
stage IU
1
U
2
characteristic curve for gentle and optimum charging of the batter-
ies.
Fig. 2: IU1U2 charging characteristic
I phase: Charging with constant current
Depending on the battery charge state, the battery is charged with maximum
charging current to store as much energy as possible in the battery. After
reaching the set main charging voltage, the charger switches to the next char-
ging phase (U
1
phase). If the set main voltage is not reached within max. 10
hours, the device changes to the U
2
phase.
U
1
phase: Charging with constant current
In the main charging phase, the voltage is kept at a constant value. As the bat-
tery increasingly charges, the current decreases continuously and approaches
a lower limit.
Battery
Type
Main charge voltage
Gel battery
24 V
28.8 V
Wet cell battery
24 V
28.2 V
AGM battery
24 V
28.8 V
11
LEAB Automotive GmbH
Thorshammer 6
24866 Busdorf
LEAB Automotive GmbH
6 Charging characteristic
