Specifications

Wireless CPU
®
Q24 Series
Interfaces
©Confidential Page: 50 / 83
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WM_PGM_Q24NG_PTS_001-005 November 20, 2007
3.14.4 Li-Ion Charging Alg
During the charging to tune parameters
embedded in the Wireless CPU
AT+WBCM=<Mode>,<Ch deltaT lMax>
<BattLevelMin>, <MaxVoltP
<M p>,<Min eryTemp> rrent>, <De VoltStart>,
<Battery_Pulse_Charging_ <Battery_Fast_Charging_Timeout>,
< , <Ba (See the AT command
Interface Guide [4]).
orithm
process of a Li-Ion battery, it is required
®
operating system:
argeInd>,<T
ulse>,
emp>,<BattLeve ,
axBatteryTem Batt
Timeout>,
,<Charging_Cu dicated
TPulseOutCharge> ttIntRes>, <BattChangeLevel>
Caution:
The parameters need to be tuned accordin
ime:
g to the battery specifications.
The main parameters to be tuned are:
Parameters related to t
• BatteryFastChargingTimeout: Maximum duration of the fast charging period.
(T1)
• B tteryPulseCharg the charging pulse
• TPulseOutCharge: Monitoring oltag
process is not activated(T3)
Parameters related to voltage:
a ingTimeout: Maximum duration of
period.(T2)
time of the VBATT v e when charging
• BattLevelMin: Minimum VBATT e batt
• BattLevelMax: Maximum VBATT voltage allowed by the battery (<4.5V)
• DedicatedVoltStart: Pulse charging is started above this threshold voltage
arameter related to charging current:
voltage allowed by th ery (>3.2V)
P
arameters related to safety:
• ChargingCurrent: Charging current delivered by the charger
P
These parameters are important; as they en
• MaxVoltPulse: Maximum VBATT over-voltage supported by the PCM of the
battery (Protection Circuit Module)
• TdeltaTemp: Delta time interval to measure the variation of the battery
temperature
• Min_Battery_Temp_Volt: Lowest value for battery temperature sensor voltage
in mV (highest temperature with a NTC
• Max_Battery_Temp_Volt: Highest value for battery temperature sensor
voltage in mV (lowest temperature with a NTC)
sure that the battery will not be damaged.