H
-56-
igh Voltage Safety (2012 Model)
The HV battery assembly powers the high voltage electrical system with DC
electricity. Positive and negative orange colored high voltage power cables are
routed from the HV battery assembly, under the vehicle floor pan, to the
inverter/converter. The inverter/converter contains a circuit that boosts the HV
battery voltage from 207.2 to 650 Volts DC. The inverter/converter creates 3-
phase AC to power the motor. Power cables are routed from the
inverter/converter to each high voltage motor (electric motor, electric generator,
and A/C compressor). The following systems are intended to help keep
occupants in the vehicle and emergency responders safe from high voltage
electricity:
High Voltage Safety System
• High voltage fuses provide short circuit protection in the HV battery
assembly.
• Positive and negative high voltage power cables connected to the HV
battery assembly are controlled by 12 Volt normally open relays . When
the vehicle is shut off and not charging, the relays stop electrical flow from
leaving the HV battery assembly.
WARNING:
The high voltage system, including the charging system, may remain
powered for up to 10 minutes after the vehicle is shut off, disabled, or
charging stops. To prevent serious injury or death from severe burns
or electric shock, avoid touching, cutting, or breaching any orange
high voltage power cable or high voltage component.
• Both positive and negative power cables are insulated from the metal
body. High voltage electricity flows through these cables and not through
the metal vehicle body. The metal vehicle body is safe to touch because it
is insulated from the high voltage components.
• A ground fault monitor continuously monitors for high voltage leakage
to the metal chassis while the vehicle is running. If a malfunction is
detected, the hybrid vehicle computer will illuminate the master warning
light
in the instrument cluster and indicate “Check Hybrid System” on
the multi-information display.
High Voltage Safety System – Vehicle Shut Off (READY-OFF)
High Voltage Safety System – Vehicle On and Operational (READY-ON)
12 Volt Auxiliary
Battery
Hybrid Vehicle
Computer
Volt DC
00
Volt DC
00
Volt AC
A/C
Compressor
Electric
Generator
Electric
Motor
00
Volt DC
00
Inverter/
Converter
Battery Charger
Assembly
AC
3-Phase
HV Battery
Assembly
12 Volt Auxiliary
Battery
Hybrid Vehicle
Com
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