Charging Methods - Charge Parameter Settings - XciteRC X-PERT X90T Mode D'emploi

Charging methods

Charging methods - Charge parameter settings

NiMH / NiCd - Mode CHG
will be charged by the constant current method with Delta-Peak cut-off. Here, the charging current over the
EN
entire period remains constant, the battery voltage rises slowly during the charging process. At the end of the
charge, however, it falls back slightly. This so-called Delta-peak point is recognized by the charger and used
to stop charging. After shutdown the battery is charged with a very low charging current to prevent a drop
in voltage until use (trickle charge).
WARNING: if the voltage of the battery is lower than 2.5 V, the Delta-Peak voltage may not be detected
properly, which may result in an overcharge. For safety reasons use a temperature sensor or set the charging
current above 1C - fire hazard!
Delta-Peak: before charging set the ∆p value (5 - 20 mV per cell) for automatic charge termination. If the
delta-peak is set higher, there is the danger of overheating the battery, if it is set lower, the battery may not
fully charged. A good starting point is 7 mV for NiMH and 12 mV for NiCd-batteries.
Discharge: Check the end-of-discharge voltage carefully: NiMH 1.0 V/cell and NiCd 0.85 V/cell.
Cycle mode: the charger may perform 1-5 cycles of DCHG > CHG or CHG > DCHG continually.
C > D2T means two times a cycle charge and discharge. NOTE: the battery may become warm during the
cycling. The program inserts a time delay function to allow the battery to cool down during the cycles. The
value ranges from 1 - 60 minutes, we recommend min. 10 minutes delay.
Lithium Batteries - Mode BCHG
are charged by the CC / CV method in the mode BCHG (balancer charge). Here the battery is initially charged
with a constant charge current (CC) until the battery reaches its final charging voltage (eg. 4.2 V / cell for a
Li-Po battery). In order to keep this voltage, the charging current is gradually reduced (CV = constant voltage).
If charging current is below 10% of the initial value, the charging process will be terminated.
The following types of Lithium batteries can be charged: LiPo - Li-Ion - LiFe
NOTE: the charger will set the charge current according to a rate of 1C automatically when you set the ca-
pacity of the battery pack. If the battery pack allows you to charge with a higher rate, you can set the current
CURR higher.
Discharge: Check the end-of-discharge voltage carefully, you may find the correct voltages in chapter Using
the charger for the first time.
Lead-acid batteries (Pb) - Mode CHG
are also charged by the CC / CV method. For charging a Pb battery with nominal voltage from 2 - 20 V - a
Pb battery can not be charged repidly. It can only deliver relatively low current compared to its capacity. The
optimal charge current will be 1/10 of the nominal capacity. Always follow the instructions supplied by the
battery manufacturer.
Discharge: Check the end-of-discharge voltage carefully, you may find the correct voltages in chapter Using
the charger for the first time.
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X-pert Charger X90T