Varta 63094, Техническое руководство

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COINPOWER | 19
Illustrates the different phases during a charge cycle
3.3 Charging IC
CoinPower batteries may be charged with any standard
single-cell Lithium charging-IC which implements the
CC / CV-procedure for Lithium systems.
Important: The charging current control have low
level setting. The charging procedure can also be
implemented by a microcontroller or DSP.
A Constant-current Constant-voltage (CC / CV)
controlled charge system is used for charging Lithium
and some other battery types that may be vulnerable
to damage if the upper voltage limit is exceeded. The
manufacturers‘ specified constant current charging
rate is the maximum charging rate that the battery
can tolerate without damaging the battery. Special
precautions are needed to maximize the charging rate
and to ensure that the battery is fully charged while at
the same time avoiding overcharging. For this reason
it is recommended that the charging method switches
to constant voltage before the cell voltage reaches
its upper limit. Note that this implies that chargers for
Lithium-Ion cells must be capable of controlling both
the charging current and the battery voltage.
Recommended charging ICs for VARTA CoinPower
batteries:
Texas Instruments
• BQ 24040
• BQ 24050
• BQ 24052
Linear Technology
• LT 4070
• LT 4071
Please note: There are many more charging ICs
available on the market for use in charging VARTA
CoinPower batteries.
COINPOWER | CHARGING AND DISCHARGING