Discharging - Varta CoinPower CP 1654 A4 Technical Handbook

COINPOWER | HANDLING PRECAUTIONS AND PROHIBITIONS
Prohibition of Trickle Charging or
Continuous Charging
Trickle charging or continuous charging is prohibited.
Trickle charging conditions or continuous charging can
lead to overcharging, generation of internal pressure
and degeneration of the cell.
The cell shall be charged with constant current until
4.3 V ± 50 mV, then with constant voltage and tapering
current. At approx. 0.02C current the charging must be
stopped. Charging should restart only if appreciable
capacity has been discharged from the cell, or the cell
voltage has fallen itself below a voltage level of 4.0 V.

7.3 Discharging

Discharge Current
The cell shall be discharged at less or equal than the
maximum discharge current specified in the Data Sheet.
High discharge current may reduce the discharging
capacity significantly, or cause overheating.
Discharge Temperature
The cell shall be discharged within the temperature
range that is specified in the Data Sheet.
Over-Discharging
Not using the cell(s) for a long time may lead to over-
discharge. In order to prevent overdischarging, the
cell(s) shall be charged periodically to maintain a
voltage in the range of 3 V to 3.8 V.
Over-discharging may cause loss of cell performance, or
damage battery function.
The application device shall be equipped with a device
to prevent further discharging below the cutoff voltage
specified in the Data Sheet.
PCM over-discharge detection threshold / v oltage must
not be used as cutoff voltage for battery.
Also the charger shall be equipped with a device to
control the recharging procedures as follows:
In case of over-discharging, the cell(s) / b attery pack
shall start with a low current (0.01 – 0 .07C) for 15 – 3 0
minutes, i.e. precharging, before rapid charging starts.
The charging according to the Data Sheet shall be
started after the individual cell voltage has risen
above about 3 V within 15 – 3 0 minutes, which can be
determined and controlled by the use of an appropriate
timer for precharging.
In case the individual cell voltage does not rise to about
3 V within the pre-charging time, the charger shall have
functions to stop the further continuous charging and
display that the cell(s) is / a re in an abnormal state.
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