2023 HYUNDAI IONIQ 5 auxiliary battery

01
1 -7
Electric Vehicle
An electric vehicle is driven using a
battery and an electric motor. While
general vehicles use an internal
combustion engine and gasoline as fuel,
electric vehicles use electrical energy
that is charged inside the high voltage
battery. As a result, electric vehicles are
eco-friendly in that they do not require
fuel and do not emit exhaust gases.
Characteristics of Electric
Vehicles
1. It is driven using the electrical energy that is charged inside the high voltage
battery. This method prevents air
pollution since fuel, like gasoline, is
not required, negating the emission of
exhaust gases.
2. A high performance motor is used in the vehicle as well. Compared to
standard, internal combustion engine
vehicles, engine noise and vibrations
are much more minimal when driving.
3. When decelerating or driving downhill, regenerative braking is
utilized to charge the high voltage
battery. This minimizes energy loss
and increases the distance to empty.
4. When the battery charge is not
sufficient, AC charge, DC charge and
trickle charge are available. (Refer to
“Charge Types for Electric Vehicle” for
details.)
Information
What does regenerative braking do?
It uses an electric motor when decelerating and braking and transforms kinetic
energy to electrical energy in order to
charge the high voltage battery. (Torque
is applied in the opposite direction when
decelerating to generate braking force and
electric energy.)
Battery Information
• The vehicle is composed of a high
voltage battery that drives the motor
and air-conditioner, and an auxiliary
battery (12 V) that drives the lamps,
wipers, and audio system.
• The auxiliary battery is automatically
charged when the vehicle is in the
ready (
) mode or the high
voltage battery is being charged.
eleCtriC VeHiCle

Foreword / Electric Vehicle System Overview
1-8
main ComponentS oF eleCtriC VeHiCle
Main Components of Electric
Vehicle
• On-Board Charger (OBC) : A device
that charges the high voltage battery
by converting AC power of the power
grid to DC power.
• Inverter : Transforms direct current
into alternate current to supply power
to the motor, and transforms alternate
current into direct current to charge
the high voltage battery.
• LDC : Transforms power from the high
voltage battery to low voltage (12 V) to
supply power to the vehicle (DC-DC).
• VCU : Control the various controls on
the vehicle.
• Motor : Uses electrical energy stored
inside the high voltage battery to drive
the vehicle (functions like an engine in
a standard vehicle).
• Reduction gear : Delivers rotational
force of the motor to the tires at
appropriate speeds and torque.
• High voltage battery (lithium-ion
battery) : Stores and supplies power
necessary for the electric vehicle
to operate (12 V auxiliary battery
provides power to the vehicle features
such as lights and wipers).

à OBC : On-Board Charger

à LDC : Low Voltage DC-DC Converter

à VCU : Vehicle Control Unit
WARNING
• Do not intentionally remove
or disassemble high voltage
components and high voltage
battery connectors and wires. Also,
be careful not to damage high
voltage components and the high
voltage battery. It may cause serious
injury and significantly impact the
performance and durability of the
vehicle.
• When inspection and maintenance
is required for high voltage
components and the high voltage
battery, contact an authorized
HYUNDAI dealer.
High Voltage Battery
(lithium-ion battery)
• The charge amount of the high
voltage battery may gradually
decrease when the vehicle is not
being driven.
• The battery capacity of the high
voltage battery may decrease when
the vehicle is stored in high/low
temperatures.
• Distance to empty may vary depending on the driving conditions
(such as outside temperature), even
if the charge amount is the same.
The high voltage battery may expend
more energy when driving at high-
speed or uphill. These actions may
reduce the distance to empty.
• The high voltage battery is used when
using the air-conditioner / heater.
This may reduce the distance to
empty. Make sure to set moderate
temperatures when using the air-
conditioner/heater.

Foreword / Electric Vehicle System Overview
1-22
Utility Mode
The high voltage battery is used instead
of the 12V auxiliary battery for operating
the convenient features of the vehicle.
When driving is not necessary such as
while camping or when stopping the
vehicle for a long time, it is possible to
use the electrical devices (audio, lights,
air conditioner, heater, etc.) for long
hours.
ONE1Q011032L
System Setting and Activation
System setting
The driver can activate the Utility mode
function when the following conditions
are satisfied. •
The vehicle is in the ready (
) mode and the gear is shifted
to P (Park).
• The EPB (Electronic Parking Brake) is
not a malfunction.
• ‘EV settings → Utility mode’ is selected on the infotainment system screen. System Activation
When the system is activated:•
The (
) indicator will turn off, and
the () indicator will illuminate on
the cluster and the EPB is applied.
• All electric devices are usable but the
vehicle cannot be driven.
• The EPB can be cancelled by pressing
the EPB switch.
Gear cannot be shifted out of P (Park).
If a shift attempt is made, a message
“Shifting conditions not met” will be
displayed on the infotainment system
screen.
System Deactivation
The Utility mode can be deactivated by
pressing the START/STOP button to the
OFF position. The function cannot be
deactivated from the EV settings.

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ONE1Q011011
When the remaining battery is lower than
10 % on the SOC gauge, the warning light (
) turns ON to alert you of the battery
level.
When the warning light (
) turns ON,
the vehicle can drive an additional 18 ~
25 miles (30 ~ 40 km) depending on the
driving speed, heater/air conditioner,
weather, driving style, and other factors.
Charging is required.
NOTICE
When the high voltage battery range
shows 25 ~ 30 miles (40 ~ 50 km),
the vehicle speed is limited and then
eventually the vehicle will turn OFF.
Charge the vehicle immediately.
Aux. Battery Saver+
The Aux. Battery Saver+ is a function that
monitors the charging status of the 12 V
auxiliary battery.
If the auxiliary battery level is low, the
main high voltage battery charges the
auxiliary battery.
Information
• The Aux. Battery Saver+ activates
maximum of 20 minutes. If the Aux. Battery Saver+ function activates
more than 10 times consecutively, in
the Automatic Mode the function will
stop activating, judging that there is
a problem with the auxiliary battery.
In this case, drive the vehicle for some
period of time. The function will start activating if the auxiliary battery
returns to normal.
• The Aux. Battery Saver+ function
cannot prevent battery discharge if the auxiliary battery is damaged, worn out,
used as a power supply or unauthorized
electronic devices are used.
• If the Aux. Battery Saver+ function was activated the high voltage battery level
may have decreased.

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1-63
If an Accident Occurs
WARNING
• When a vehicle accident occurs,
move the vehicle to a safe place,
turn OFF the vehicle and disconnect
the high voltage cut-off switch from
the auxiliary battery (12V) to prevent
high voltage electricity from flowing.
• If electric wires are exposed from
inside or outside the vehicle, do not
touch the wires.
Also, do not touch the high voltage
electric wire (orange), connector,
and all electric components and
devices. This may cause electric
shock and lead to injuries.
WARNING
• When a vehicle accident occurs and
the high voltage battery is damaged,
harmful gas and electrolytes may
leak. Be careful not to touch the
leaked liquid.
• When you suspect leakage of
inflammable gas and other harmful
gases, open the windows and
evacuate to a safe place. If any
leaked fluid comes in contact with
your eyes or skin, immediately clean
the affected area thoroughly with
tap water or saline solution and
have doctors inspect it as soon as possible.
WARNING
• If a small scale fire occurs, use a fire
extinguisher (ABC, BC) that is meant
for electrical fires. If it is impossible
to extinguish the fire in the early
stage, remain a safe distance from
the vehicle and immediately call your
local fire emergency responders.
Also, advise them that an electric
vehicle is involved.
• If the fire spreads to the high
voltage battery, large amount of
water is needed to put out the fire.
Using small amount of water or
fire extinguishers not meant for
electrical fires could cause serious
injury or death from electrical
shocks.
WARNING
If you cannot put out the fire
immediately, the high voltage battery
may explode. Evacuate to a safe place
and do not let other people approach
the site.
Contact the fire department and notify
them of an electric vehicle fire. • If the vehicle is flooded with water,
immediately turn off the vehicle and
evacuate to a safe place. Contact
the fire department or an authorized
HYUNDAI dealer.
SaFety preCautionS For eleCtriC VeHiCle

9-8
Maintenance
Normal Maintenance Schedule The following maintenance services must be performed to ensure good vehicle performance.
Keep receipts for all vehicle services to protect your warranty. Where both mileage and time are shown, the frequency of
service is determined by whichever occurs first.
MAINTENANCE INTERVALS
MAINTENANCE ITEM Months
4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96
Miles×1,000 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Km×1,000 8 16 24 32 40 48 56 64 75 80 88 96 104 112 120 128 136 144 152 160 168 176 184 192
Cooling system
Inspect every 15,000 miles or 12 months
Rotate Tires
(Includes Tire Pressure and
Tread Wear Inspection) I I I I I I I I I I I I I I I I I I I I I I I I
Replace Climate Control Air
Filter (For Evaporator and
Blower Unit) R R
R R R R R R
Coolant *
1 Standard
At first, replace 120,000 miles (200,000 km) or 120 months.
After that, replace every 25,000 miles (40,000 km) or 24 month.
Low Conductivity Replace every 40,000 miles (60,000 km) or 36 months *
2

12V auxiliary battery condition I I
I I I I I I
Brake lines, hoses, and connections I I
I I I I I I
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change. *1 : When replacing or adding coolant, visit an authorized HYUNDAI dealer.
*2 : For your convenience, it can be replaced prior to it’s interval when you do maintenance of other items.