Operating modes/charging mode (permanent settings)
2280073 Rev.1 Page 23
6.6 Charging mode for 12V lithium-ion batteries (Charging LIO)
This operating mode is for charging 12V lithium-ion Batteries. The MC1500 is ready to use after
it has been switched on by pressing control button 1 (on/off). This means that the output voltage
of the charger unit remains 0V until a battery has been connected to the charger's output.
When connecting a battery, its voltage is measured first. If the voltage of the connected battery
is not within the permissible range (see table in section 6.7 "Overview of applicable voltage
ranges"), the MC1500 does not switch on and the output voltage remains at 0V, and the LCD
displays an error message "Faulty battery".
If the battery is within an applicable 12V voltage range, the selects the corresponding output
voltage and charges the battery (see table in section 6.7). The LCD displays the message
"12V LIO charge".
Charging continues until the charging current falls below the limit of 2.5A. After that the MC1500
switches over to trickle charging without any post-charging time.
During trickle charging, the voltage is increased to charging-voltage level every 3 minutes to
avoid battery discharging due to low currents (high voltage stability of lithium-ion battery). The
charger unit will switch over to charging again if the current rises back above 2.5A during this
test. Hence, the charging cycle starts again.
If, during an adjustable time (default setting 12h), the charging current doesn't fall below 2.5A,
the MultiCharger 1500 is switched over to trickle charging and status message "Max. CHRG
time" is shown on the display.
6.7 Overview of applicable voltage ranges
The following table provides an overview of the applicable voltage ranges battery charging:
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