HV Battery Control System

High Voltage Safety
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 optional 4WD-i 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 "1" provides short circuit protection in the HV battery pack.

- Positive and negative high voltage power cables "2" connected to the HV battery pack are controlled by 12-Volt normally open relays "3". When the vehicle is shut off, the relays stop electricity flow from the HV battery pack.

WARNING:
High voltage electricity can cause death or serious injury from severe burns or electric shock. To avoid death or serious injury wait 5 minutes after disabling the vehicle to discharge high voltage electricity, and do not touch, cut, or open any orange high voltage power cable or high voltage component.

- Both positive and negative power cables "2" are isolated from the metal chassis, so there is no possibility of shock by touching the metal chassis.

- A ground fault monitor "4" continuously monitors for high voltage leakage to the metal chassis while the vehicle is running. If a malfunction is detected, the vehicle computer "4" 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.




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 center console "1". Both positive and negative 42-Volt cables "2" 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.