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_CombiPower_IA_DE-IT.book Seite 73 Freitag, 21. Oktober 2011 8:10 20
CombiPower
Technical description
6.5
Battery charging function
The charging characteristics are referred to as modified IU0U characteristics.
U/V
1
2
3
4
5
6
I/A
U
I
U0
U
100 %
I
6 %
t
1: Analysis phase
First, the battery charge is analysed with increasing charge current.
2: I phase (bulk)
At the beginning of the charging process, the flat battery is charged with a
constant current (100% charge current) until the battery voltage reaches
14.4 V or 28.8 V. The charging current decreases when the battery has
reached this charging level.
3, 4: U0 phase (absorption)
Now the two-stage absorption charging process (U0-Phase) begins, where
the charge voltage and duration depend on the size and type of the battery.
Different voltages can be set for phases 3 and 4, which remain constant until
the maximum charging current (6% of the set current) is reached.
Phase 4 ends no later than 8 hours after 13.8 V or 27.6 V is reached.
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