User Manual

MCA1215, MCA1225, MCA1235 Technical description

6.3 Battery charging function

The charging characteristics are referred to as modified IU0U characteristics.

1: 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 the charging volt-

age. The charging current decreases when the battery has reached this charging

level.

2, 3, 4: U0 phase (absorption)

Now the three-stage absorption charging process (U0 phase) begins, where the

duration depends on the battery. The voltage remains constant (U0). In the first

2 minutes, the charging of the battery is determined. Then the main charging phase

begins when the battery is fully charged.

Once the battery is completely charged, or the charging current is below 6 % of the

rated charging current for 15 minutes, the U0 phase has finished.

U0 U

100 %

6 %

234 65

U/V

I/A

MCA1215-1235--IO--AU.book Seite 13 Donnerstag, 13. Oktober 2016 10:37 10