Specifications

Wireless CPU
®
Q24 Series
Interfaces
3.14.3 Ni-Cd / Ni-Mh Charging Algorithm
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WM_PGM_Q24NG_PTS_001-005 November 20, 2007
the charging process of a Ni-Cd and Ni-Mh battery, it is required to tune
®
+WBCM=<Mode>, <ChargeInd>, <BattLevelMax>, <BattLevelMin>,
TPulseInCharge>, <TPulseOutCharge>, <BattIntRes>, <BattChangeLevel > (See the
T command Interface Guide [4]).
During
software parameters in the Wireless CPU
operating system:
AT
<
A
Caution:
he parameters need to be tuned according to the battery specifications.
he main parameters to be tuned are:
arameters related to time:
T
T
P
• TPulseInCharge: Monitoring time of the VBATT voltage during a charging
process (T2)
• TPulseOutCharge: Monitoring time of the VBATT voltage when charging
process is no
Parameters related to voltage:
t activated(T3)
B voltage allowed by the battery (>3.2V) • attLevelMin: Minimum VBATT
• BattLevelMax: Maximum VBATT voltage allowed by the battery (<4.5V)
Ni-Cd / Ni-Mh battery and tunable parameter
Parameter Default value Min Max Unit
T1 1000 (Not tunable) ms
T2 100 100 10000 ms
T3 5000 100 10000 ms
BattLevelMin 3400 3400 3800 mV
BattLevelMax 4200 4000 5000 mV