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CONTROL PANEL
ETV 1591-H
24.03.2015
Page 33
5.7.3
Battery Charging Curve
In the following diagram, the battery was charged for period of 22 h in the ETV 1591-H.
The battery voltage and charging current measured by the UPS were recorded during the
charging process.
Orange curve:
battery voltage
After a charging time of approximately 18 hours, the battery reaches the maximum
possible charge (can be seen on the orange, flat voltage drop after 18 hours).
Because to the very flat charging voltage curve, the battery status and the charged
capacity cannot be reliably specified.
Gray curve:
charging current
After approximately 18 hours, the current sinks to a 40 mA floating charge (see battery
charging current diagram, curve: 5 to 4).