traction control INFINITI Q50 HYBRID 2017 Dismantling Guide
Page 12 of 55
No. Component
LocationDescription
T
raction Motor
Inverter
Engine compartment
(right rear side)Converts the DC power stored in the high-
voltage battery to three-phase AC power and
controls motor torque (revolution) by regulating
the motor current. The inverter has a built in
high-voltage capacitor.
Traction Motor Built-into the
transmission Converts three-phase alternating current (AC)
power to drive power (torque) which propels
the vehicle.
High-voltage
Battery
Trunk area (behind
rear seat back) The high-voltage battery stores and outputs
DC power (Maximum voltage 400V) needed to
propel the vehicle.
DC/DC Converter Trunk area (mounted to top of high-
voltage battery) The DC/DC converter reduces the voltage of
the high-voltage battery to provide power to
the 12-volt battery in order to operate the
vehicle’s electric components (headlights,
audio system, etc.) .
Service Plug Trunk area (below
parcel shelf; behind
access door in trim
panel) This is used to disable the high-voltage system.
12-volt Battery Trunk area (left side
behind trim panel) A lead-acid battery that supplies power to the
low voltage devices.
High-voltage
Harnesses Trunk area (on high-
voltage battery) ,
under floor pan,
engine compartment Orange-colored power cables carry high DC
voltage between each of the high-voltage
components.
Electric Air
Conditioner
Compressor
Engine compartment
(front driver side)Air conditioner compressor
2-3 High-voltage Battery Pack Specifications High-voltage Battery Specifications
High-voltage
battery voltage 346V (400V max.)
Number of high-voltage battery modules in the pack 12 modules (96 cells)
High-voltage battery module voltage 28.8V each
High-voltage battery dimensions 29.63 x 17.81 x 14.85 in.
(752.5 x 452.4 x 377.1 mm)
High-voltage battery weight 108.05 lbs (49 kg)
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2-5 High-voltage Safety System
The
high-voltage safety system is intended to help keep vehicle occupants and emergency responders safe
from high-voltage electricity. • A high-voltage fuse provides short circuit protection inside the high-voltage battery.
• The high-voltage safety system is insulated from the metal chassis.
• Positive and negative high-voltage power cables are connected to the high-voltage battery and arecontrolled by normally open system main relays (SMR1 and SMR2) . When the vehicle is shut off,
the relays stop electrical flow from leaving the high-voltage battery. However, it can take
approximately ten (10) minutes for the high-voltage capacitor to fully discharge. Trunk
J
unction Box High-Voltage Battery
System main relay 1
Service Plug (With Fuse)
System main relay 2
Transmission
Traction Motor Traction Motor
Inverter
(With built in high- voltage capacitor) Electric
Compressor DC/DC
Converter
Engine Compartment DANGER
HPCM
(Hybr
id Powertrain
Control Module)
AAYIA0156GB
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