Canon BJC-55 Service Bulletin page 153
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Also See for BJC-55:
- User manual (468 pages) ,
- Service manual (206 pages) ,
- Service bulletin (22 pages)
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BJC-50
c) Battery temperature detection
The thermistor inside the lithium ion battery pack measures the internal battery
temperature and detects whether the battery is installed or not. This thermistor is
connected between the T terminal and negative terminal of the battery pack. ASIC
uses the A/D value of the thermistor's output voltage, THBAT, to determine whether
the battery temperature is normal. If it is, the recharging will begin.
Battery temperature THBAT
-30°C ≥ THBAT
0°C ≥ THBAT
0°C ≥ THBAT
45°C ≥ THBAT>0°C
THBAT > 45°C
THBAT > 60°C
Lithium Ion
Battery Pack
Thermistor
TABLE 4-4 BATTERY TEMPERATURE
A/D value
965~1024
814~1024
835~1024
408~813
0~407
0~336
Vcc1(+5V)
C
T
ICP 2
Figure 4-30 Battery Temperature Detection Circuit
Determination by THBAT
No battery
Cannot start recharging
Recharging stop
Permission to start recharging
Cannot start recharging
Recharging stop
IC 11
Analog
Switch
THBAT
4-43
Part 4: Technical Reference
IC 6
ASIC
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