ROBBE POWER PEAK ULTIMATE Li 8427 Li Manual De Instrucciones Adicional página 8

The POWER PEAK ULTIMATE battery char-
ger has been upgraded by the addition of the
facility to charge various types of Lithium-Ion
battery. Its title now bears the suffix Li.
The unit is capable of charging up to four
Lithium cells wired in series, with a maximum
current of 5 Amps.
To avoid damage please be sure to read
through these instructions carefully before
using the charger.
Introduction
There are various types of Lithium batteries:
1. Lithium-Ion batteries containing fluid elect-
rolyte, and featuring a nominal voltage of
3.6 Volts. This is the first generation of
Lithium cells, and is not often used for
modelling applications.
2. Lithium-Ion batteries containing fluid elect-
rolyte, and featuring a nominal voltage of
3.7 Volts. This is the second generation of
Lithium cell, and is housed in a metal can.
3. Lithium-Ion-Polymer batteries containing
gel-form electrolyte, and featuring a nomi-
nal voltage of 3.7 Volts. This is the current
generation of Lithium cell, and they have
also become known as Li-Poly batteries.
The gel electrolyte results in a reduced
pressure build-up in the cell during char-
ging and discharging, for which reason a
foil housing is adequate. This cell has
rapidly become very popular for model
purposes due to its low weight and high
energy density.
The charging process is the same for all
Lithium cell types, but the charge termination
voltage varies according to the nominal cell
voltage; this parameter can therefore be
selected in the Ultimate Li's set-up menu.
In general terms the following specification
applies to all Li-Poly batteries:
Charge current:
1 C, i.e. capacity value = charge current
Example: Li-Poly cell of 1500 mAh capacity:
1 C = 1500 mA (= 1.5 A) charge current
Supplementary operating instructions
POWER PEAK ULTIMATE Li
8
Discharge current:
3 - 5 C, peak 10 C
Final charge voltage:
Cells of 3.6 V nominal voltage = 4.1 Volt
Cells of 3.7 V nominal voltage = 4.2 Volt
Final discharge voltage:
Cells of 3.6 V nominal voltage = 2.4 Volt
Cells of 3.7 V nominal voltage = 2.5 Volt
Important note:
If the stated limits for final charge or disch-
arge voltage are exceeded, the cell will be
damaged; the damage takes the form of per-
manent capacity loss. If the limit values are
exceeded for a protracted period, the cell
will be ruined, and may explode and start a
fire.
Effective cell life:
The theoretical useful life of a cell when
discharged at low discharge currents is
around 500 charge/discharge cycles. Howe-
ver, if the discharge current is relatively high
- around 3-5 C - the cell's useful life is redu-
ced to around 300 cycles. If even higher
discharge currents are used, the cycle life
suffers a further significant reduction.
Temperature range:
Charging: -> 0° ... +45°C
Discharging -> -20° ... +60°C
Temperature behaviour
Lithium cells feature a pronounced tempera-
ture index which means that the full nominal
capacity is not available at very low and very
high temperatures.
Temperature curve
Order No.
8427 Li
Temperature °C