2020 HYUNDAI SONATA HYBRID battery

01
1-19
Refuel to prevent Hybrid battery
damage
OOSHQ019011L
This message is displayed when the fuel
tank is nearly empty.
You should refill the fuel tank to prevent
hybrid battery damage.
Refill inverter coolant
OOSHQ019012L
This message is displayed when the
inverter coolant is nearly empty.
You should refill the inverter coolant.
Park with engine On to charge
battery
OOSHQ019013L
This message is displayed when the
hybrid battery power (SOC) level is low.
If this occurs, park the vehicle in a safe
location and wait until the hybrid battery
is charged.
Start engine to avoid battery
discharge
OOSHQ019027L
This message is displayed to inform the
driver the 12V battery may be discharged
if the ignition switch is in ON position
(without the
indicator ON).
Set the vehicle to the ready () mode
to prevent the 12V battery from being
discharged.

Foreword
1-20
Energy Flow
The hybrid system displays the energy
flow in various operating modes. While
driving, the current energy flow is
specified in 11 modes.
Vehicle stop
ODN8HQ019001L
The vehicle is stopped.
(No energy flow)
EV propulsion
ODN8HQ019002L
Only the motor power is used to drive the
vehicle.
(Battery → Wheel)
Power assist
ODN8HQ019003L
Both the motor and the engine power are
used to drive the vehicle.
(Battery & Engine → Wheel)
Engine only propulsion
ODN8HQ019004L
Only the engine power is used to drive
the vehicle.
(Engine → Wheel)

01
1-21
Engine generation
ODN8HQ019005L
When the vehicle is stopped, the high-
voltage battery is charged up by the
engine.
(Engine → Battery)
Regeneration
ODN8HQ019007L
The high-voltage battery is charged up
by the regenerative brake system.
(Wheel → Battery)
Engine brake
ODN8HQ019010L
The engine braking is used to decelerate
the vehicle.
(Wheel → Engine)
Power reserve
ODN8HQ019008L
The engine is simultaneously used to
drive the vehicle and to charge up the
high-voltage battery.
(Engine → Wheel & Battery)

Foreword
1-22
Engine generation/motor drive
ODN8HQ019011L
The engine charges up the high-voltage
battery. The motor power is used to drive
the vehicle.
(Engine → Battery → Wheel)
Engine generation/regeneration
ODN8HQ019009L
The engine and regenerative brake
system charges up the high-voltage
battery.
(Engine & Wheel → Battery)
Engine brake/regeneration
ODN8HQ019012L
The engine braking is simultaneously
used to decelerate the vehicle and to
charge up the high-voltage battery.
(Wheel → Engine & Battery)
Start engine to avoid battery
discharge
ODN8HQ019030L
If the engine is not turned on with
the Engine Start/Stop button in ACC
or ON for a while, the battery can be
discharged. Please turn on the engine to
prevent 12V battery from discharge.

01
1-23
SAFETY PRECAUTIONS FOR HYBRID SYSTEM
Hybrid Vehicle Components
High voltage battery system
„„HPCU (Hybrid Power Control Unit) *1
ODN8HQ019029
„„High voltage battery system *2
OAEQ046019
*1 : Located in the engine compartment
*2 : Located under the rear seats
WARNING
Never touch orange colored or high
voltage labeled components, including
wires, cables, and connections. When
the insulators or covers are damaged or
removed, severe injury or death from
electrocution may occur.
WARNING
While replacing the fuses in the
engine compartment, never touch the
HPCU. The HPCU carries high voltage.
Touching the HPCU may result in
electrocution, serious injury, or death.
WARNING
In the hybrid system, the hybrid battery
uses high voltage to operate the motor
and other components. This high
voltage hybrid battery system can be
very dangerous.
Never touch the hybrid system. When
you touch the hybrid battery system,
serious injury or death may occur.
CAUTION
• Do not pile up any items in an area
behind the high voltage battery. In
a crash, the battery may become
unstable, or its performance may
degrade.
• Do not apply strong force nor pile
up any items above the luggage
compartment. Such an attempt
may distort the high voltage battery
case, causing a safety problem or
degrading the performance.
• Be careful when loading flammable
liquid in the luggage compartment.
It could cause operational and safety
degradation if the liquid leaks and
flows in the high voltage battery.
„„Drive motor *3
OAEQ046017
*3 : Located in the engine compartment

Foreword
1-24
WARNING
• Do not disassemble the high voltage
motor connector. The high voltage
motor connector may contain
residual high voltage. Coming in
contact with high voltage may result
in death or serious injury.
• Your vehicle’s hybrid system should
only be inspected or repaired by an
authorized HYUNDAI dealer.
WARNING
• Do not disassemble or assemble
the high voltage battery system.
Doing so may result in electric shock,
causing death or serious injury.
• If you disassemble or assemble
hybrid system components
improperly, it may damage the
performance and reliability of your
vehicle.
• If electrolyte comes in contact
with your body, clothes or eyes,
immediately flush with a large
quantity of fresh tap water. Have
your eyes examined by a doctor as
soon as possible.
WARNING
Never assemble or disassemble the
high voltage battery system.
• If you assemble or disassemble the
high voltage battery system, the
durability and performance of the
vehicle may be damaged.
• When you want to check the high
voltage battery system, have the
vehicle inspected by an authorized
HYUNDAI dealer.
• Do not touch the high voltage
battery and high voltage cable
connected to motor (orange color).
Severe burns and electric shock may
occur. For your safety, do not touch
the cover of electronic components
and electronic cable. Do not remove
the cover of electronic components
and electronic cable. In particular,
never touch the high voltage battery
system when the hybrid system is in
operation. It may result in death or
serious injury.
WARNING
• Never use the package modules
(high voltage battery, inverter and
converter) for any other purpose.
• Do not use an unauthorized battery
charger to charge the high voltage
battery. Doing so may result in death
or serious injury.
• Never locate the high voltage system
near or in a fire.
• Never drill into or strike the package
module. Otherwise, it may be
damaged. An electric shock may
occur, resulting in serious injury or
death.

01
1-25
NOTICE
• When the vehicle is paint baked, do
not bake over 30 minutes in 158°F
(70°C) or 20 minutes in 176°F (80°C)
degree.
• Do not wash the engine
compartment, using water. Water
may cause an electric shock and
damage the electronic components.
WARNING
This hybrid vehicle uses the hybrid
battery system inverter and converter
to generate high voltage. High voltage
in the hybrid battery system is very
dangerous and may cause severe burns
and electric shock. This may result in
serious injury or death.
• For your safety, never touch,
replace, disassemble or remove the
hybrid battery system including
components, cables and connectors.
Severe burns or electric shock may
result in serious injury or death when
you fail to follow this warning.
• When the hybrid battery system
operates, the hybrid battery system
can be hot. Always be careful
because burns or electric shock may
be caused by high voltage.
• Do not spill liquid on the HPCU, HSG,
motor and fuses. If the hybrid system
components come in contact with
liquid, it may result in electric shock.
Service Interlock Connector
ODN8HQ019032
In case of emergency, cut the service
interlock connector cable to isolate the
high voltage of the battery.
WARNING
Never disconnect the service interlock
connector or cut the wire except in an
emergency situation.
Serious problems may occur, such as
the vehicle will not start.
Hybrid Battery Cooling Duct
ODN8HQ019027
The hybrid battery cooling duct is
located on the left side of the rear seats.
The cooling duct cools down the hybrid
battery. When the hybrid battery cooling
duct is blocked, the hybrid battery may
be overheated.
Clean the cooling duct for the hybrid
battery with a dry cloth on a regular
basis.

Foreword
1-26
WARNING
• Never clean the cooling duct of the
hybrid battery with a wet cloth. If
any water enters the cooling duct
of the hybrid battery, the hybrid
battery may cause an electric shock,
resulting in a serious damage, an
injury or death.
• The hybrid battery is composed of
lithium-ion polymer. If the hybrid
battery is improperly handled, it is
dangerous to the environment. Also
it may cause electrical shock and
severe burns, resulting in a serious
injury or death.
• Do not spill liquid over the cooling
duct of the hybrid battery. Doing
so is very dangerous. It may cause
electric shock or serious injury.
• Do not cover the cooling duct with
objects.
• Do not put any objects into the
cooling duct of the hybrid battery.
Doing so may cause loss of cooling
duct volume to the hybrid battery.
When the cooling duct is blocked
with any objects, immediately
contact your HYUNDAI dealer.
• Never place a container of liquid on
or near the cooling duct. If the liquid
spills, the hybrid battery located in
the luggage compartment may be
damaged.
• Secure all loads in the luggage
compartment to prevent them from
being tossed about before driving.
When a sharp or heavy load strike
with a strong impact or pierce the
interior luggage compartment
wall, the hybrid battery system
may be damaged, deteriorating its
performance.
• Do not obstruct the cooling duct
with any other objects.
If an Accident Occurs
WARNING
• For your safety, do not touch the
high voltage cables, connectors
and package modules. High voltage
components are orange in color.
• Exposed cables or wires may be
visible inside or outside of the
vehicle. Never touch the wires or
cables, because an electrical shock,
an injury, or death may occur.
• Any gas or electrolyte leakage from
your vehicle is not only poisonous
but also flammable. Upon witnessing
any of these conditions, open the
windows, and remain a safe distance
from the vehicle out of the road.
Immediately call emergency services
or contact an authorized HYUNDAI
dealer and advise them that a hybrid
vehicle is involved.
• When the vehicle is severely
damaged, remain a safe distance of
50 feet (15 meter) or more between
your vehicle and other vehicles/
flammables.