HIGH VOLTAGE SAFETY
– 9 –
High Voltage Safety System – Vehicle Shut
Off (
READY
-OFF)
High Voltage Safety System – Vehicle On
and Operational (
READY
-ON)
HV Battery and DC-DC Converter Cable Routing
Note: Positive and negative power cables
shown bundled as a single line
❶
❷
❸
❸
❹
The HV battery pack powers the high voltage
electrical system with DC electricity. Positive and
negative high voltage power cables are routed
from the battery pack, under the vehicle floor pan,
to the inverter/converter. The inverter/converter
contains a circuit that boosts the HV battery voltage
from 288 to 650-Volts DC. The inverter creates
3-phase AC to power the motors. A set of 3 power
cables is routed from the inverter to each high
voltage motor (electric motor, electric generator,
A/C compressor, and 4WD rear motor). Occupants
in the vehicle and emergency responders are
separated from high voltage electricity by the
following system:
High Voltage Safety System
•
A high voltage fuse
❶
provides short circuit
protection in the HV battery pack.
•
Positive and negative high voltage power cables
❷
connected to the HV battery pack are
controlled by 12-Volt normally open relays
❸
.
When the vehicle is shut off, the relays stop
electricity flow from the HV battery pack.
•
Both positive and negative power cables
❷
are
isolated from the metal chassis, so there is
no possibility of shock by touching the
metal chassis.
•
A ground fault monitor
❹
continuously
monitors for high voltage leakage to the metal
chassis while the vehicle is running. If a
malfunction is detected, the vehicle computer
❹
will illuminate the master warning light
in the instrument cluster and indicate
“CHECK HYBRID SYSTEM” on the
Multi-information Display.
•
The HV battery pack relays will automatically
open to stop electricity flow in a collision
sufficient to activate the SRS or rear
collision sensors.
The HV battery pack also powers a 288-Volt DC to
42-Volt DC converter for the assist motor in the
electric power steering (EPS). This DC-DC converter
is located under the cargo area
❶
. Both positive
and negative 42-Volt cables
❷
are contained within
plastic yellow sheathing and are isolated from the
metal vehicle chassis.
NOTE:
42-Volt DC has a higher arc potential than 12-Volt DC.
WARNING:
•
Power remains in the high voltage
electrical system for 5 minutes after the
HV battery pack is shut off.
•
Never
touch, cut, or open any orange
high voltage power cable or high voltage
component.
•
Failure to follow these warnings can
cause severe burns and electric shock
that may result in death or serious injury.
❷
❶
