Toyota Camry Hybrid AHV40 Manual page 53

7. Battery Control
D The battery smart unit detects and transmits the HV battery condition signals (voltages, currents, and
temperatures), which are used to determine charging or discharging values, to the THS ECU.
D The battery smart unit also detects and transmits the cooling fan voltage signals which are necessary to
effect cooling fan control, to the THS ECU.
D A leak detection circuit is provided in the battery smart unit in order to detect any excessive current draw
from the HV battery.
" A
System Diagram
Current Sensor
HV Battery
D Temp. Sensor
Signal
D Voltage
THS II (TOYOTA HYBRID SYSTEM II)
Battery Smart Unit
CPU
Voltage
Detection
Circuit
Leak
Detection
Circuit
Cooling Fan
THS ECU
Serial
Communication
TH-53
02HTH47TE