Hyundai NEXO Manuel utilisateur

NEXO

•If severe damage causes high-voltage components to become exposed, emergency responders should take

appropriate precautions and wear appropriate insulated personal protective equipment.

•Do not attempt to remove the safety plug while standing in the water.

•Never cut or disconnect the high voltage orange cabling and connectors without first disabling the system by

removing the safety plug.

•Exposed cables or wires may be visible inside or outside the vehicle. Never touch the wires, cables, connectors, or

any electric components before disabling the system, to prevent injury or death due to electrical shock.

Failure to follow any of these instructions may result in serious injury or death by electrocution.

•Do not cut through any component of the Airbag (SRS) system (Supplementary Restraint System)

•SRS components may remain powered and active for up to 3 minutes after the 12V electrical system is shut off or

disabled.

Disconnect the battery negative cable and wait for at least 3 minutes before beginning work.

Failure to follow any of these instructions may result in serious injury or death from accidental deployment of the

airbag system.

Emergency Response Guide

HYUNDAI ROADSIDE ASSIST

1800 186 306

This manual includes information titled as DANGER, WARNING, CAUTION & NOTICE.

These titles indicate the following:

DANGER indicates a hazardous situation which, if not avoided, will result in death or

serious injury.

WARNING indicates a hazardous situation which, if not avoided, could result in death or

serious injury.

CAUTION indicates a hazardous situation which, if not avoided, could result in minor or

moderate injury.

NOTICE indicates a situation which, if not avoided, could result in vehicle damage.

•If severe damage causes high-voltage components to become exposed, emergency responders should take

appropriate precautions and wear appropriate insulated personal protective equipment.

•Do not attempt to remove the safety plug while standing in the water.

•Never cut or disconnect the high voltage orange cabling and connectors without first disabling the system by removing

the safety plug.

•Exposed cables or wires may be visible inside or outside the vehicle. Never touch the wires, cables, connectors, or any

electric components before disabling the system, to prevent injury or death due to electrical shock.

Failure to follow any of these instructions may result in serious injury or death by electrocution.

•Do not cut through any component of the Airbag (SRS) system (Supplementary Restraint System)

•SRS components may remain powered and active for up to 3 minutes after the 12V electrical system is shut off or

disabled. Disconnect the battery negative cable and wait for at least 3 minutes before beginning work.

Failure to follow any of these instructions may result in serious injury or death from accidental deployment of the airbag

system.

Important Safety Information

Contents

Roadside Assistance ················································································· 29

- Towing ······································································································· 29

- Jump Starting······························································································· 30

Introduction ······························································································ 1

- High Voltage Safety System ··········································································· 2

- Safety Issues of Compressed Hydrogen···························································· 3

- Safety Precautions for Hydrogen Electric Vehicle ·············································· 4

NEXO Identification ··················································································· 5

- General Vehicle Description ··········································································· 5

- Identifying a Hyundai Hydrogen Electric Vehicle ················································ 5

NEXO Main Systems ··················································································· 9

- Key Specifications ························································································ 9

- Vehicle Components Location ········································································· 10

- Vehicle Components ····················································································· 11

- Airbag System (SRS : Supplemental Restraint System) ········································ 15

Emergency Procedures ··············································································· 17

- Initial Response: Identify, Immobilize and Disable ··············································· 17

- Extraction Operations ··················································································· 23

- Submersion ································································································· 25

- Vehicle Fire ································································································· 26

- High-Voltage Battery Damage and Fluid Leaks ·················································· 28

Document Purpose

The purpose of this document is to familiarize emergency responders and the towing/roadside

assistance industry with the proper methods to handle the Hyundai NEXO in an emergency situation.

This guide offers a basic overview of key vehicle systems and provides instructions for dealing with

the different types of situations encountered by emergency responders. The emergency response

procedures for this vehicle are somewhat similar to a conventional vehicle, with additional

information provided on dealing with the high-voltage electrical and hydrogen system.

Vehicle Description

A hydrogen electric vehicle is a vehicle that generates electrical energy through a fuel cell system.

While regular vehicles use an internal combustion engine and gasoline as fuel, hydrogen electric

vehicles use electrical energy that is produced by the reaction of hydrogen and oxygen. As a result,

hydrogen electric vehicles are eco-friendly since they do not emit exhaust gases.

When decelerating or driving downhill, regenerative braking is utilized to charge the highvoltage

battery. This minimizes energy losses and increases the range of the vehicle.

1. Powertrain (Stack)

2. High voltage battery

3. Hydrogen tank

Introduction

Fuel Cell Stack

Hydrogen electric vehicles, unlike regular internal combustion engine vehicles, use high voltage

electrical energy generated in the fuel cell stack as a power source. Due to this high voltage

electricity, the vehicle requires careful handling due to the high voltage hazard. The following items

are safety guidelines of the high voltage in the fuel cell stack of NEXO.

1)A metal chassis and electro-conductive enclosure is located in the fuel cell stack to prevent an

electrical shock due to the direct or indirect contact of users. The fuel cell stack has a high

protection degree of IPXXB.

2)Live parts and high voltage buses, which are generating over 400V DC in the fuel cell stack, are

designed to maintain a reliable insulation resistance with an electro-conductive enclosure. When the

insulation resistance is lower than a specified value, the user is notified and the output current of

fuel cell stack is limited.

High Voltage Battery System

This system supplies the energy which is applied during vehicle acceleration. The system is also

used to store the energy generated during regeneration braking.

1) The high voltage system is located in trunk area and is protected with a steel case.

2)The system consists of 64 cells. Each cell is sealed with an aluminum case to protect against an

electrolyte spillage. There is a rare possibility that the electrolyte in the cell will spill, even if the

battery module is cracked.

3) For safety, an over-current protection and ceramic coating isolation layer are used.

4)Non-flammable electrolyte material is used to prevent explosions or fire in an emergency case

such as a car accident.

5) High voltage cables (orange color) connect the battery system to the DC converter.

6)There is a high voltage regulator used to control the high voltage line. In addition, a highvoltage

fuse and a safety plug are used to separate the electrical sources in the system for safety.

High Voltage Safety System

General Characteristics of Hydrogen

Hydrogen is a gas with the smallest molecular weight of all gasses. It is colorless, odorless, tasteless,

and noncorrosive with combustibility and fast diffusivity. It needs to be handled with caution.

However, hydrogen is not dangerous in any other way and could even be less dangerous than other

fuels in some aspects. Since hydrogen is the lightest element , it rapidly rises and disperses in the

atmosphere without mixing with the air. Hydrogen is relatively safe as it does not easily reach the

concentration for explosion.

Hydrogen Gas Features

A hydrogen gas leak should be prevented to minimize the

hazard of ignition or detonation.

The followings are properties of gaseous hydrogen.

▪It has the lowest molecular weight, and is the smallest

molecule of any element.

▪It has the lowest density and the highest buoyancy of

any element.

▪It can cause brittleness in some materials, including

metals (materials chosen for hydrogen applications

are not susceptible to brittleness).

▪It is colorless, odorless and tasteless.

▪It burns invisibly and without smoke.

▪It has the lowest ignition energy of any fuel (less than

one-tenth that of other fuels).

▪It has a wide flammability concentration range of 4% to 75%

Hydrogen Gas Leak Detection System

The hydrogen gas detection sensor detects a hydrogen leak. If there is a leak, the hydrogen storage

system and electrical systems will be shut down. Sensors will illuminate a waring light when

concentrations reach the minimum flammability limit of hydrogen.

Sensors are installed at the fuel cell stack, fuel suppling system, and in between the hydrogen

storage tank and the ceiling of vehicle. These sensors detect a hydrogen leak under emergency

situations, allowing the system to block the hydrogen.

Safety Issues of Compressed Hydrogen

Gas CH4 C3H8 H2

Diffusion

1.0 0.63 3.8

urbulen

Flow 1.0 0.6 2.83

Diffusion Velocity Ratio of Diffusionand

Flow in the air

The NEXO uses approximately 250 ~ 450 DC voltage and high pressure hydrogen gas. Be sure to

follow the safety instructions below. Failure to follow the safety instructions may result in serious

injury or death.

[Safety precautions for the hydrogen system]

[Safety precautions for the high voltage system]

Safety Precautions for Hydrogen Electric Vehicle

From a safety point of view, hydrogen gas leaks should be prevented due to the possibility of ignition

or detonation.

The followings are properties of gaseous hydrogen.

•It has the lowest molecular weight, and has the smallest molecules of any element.

•It has the lowest density and the highest buoyancy of any element.

•It can cause brittleness in some materials, including metals (materials chosen forhydrogen

applications are not susceptible to brittleness).

•It burns invisibly and without smoke.

•It has the lowest ignition energy of any fuel (less than one-tenth that of other fuels).

•It has a wide flammability concentration range of 4% to 75%

NOTICE

•Ignition sources should not be near the vehicle. For example, exposed flame, sparks, electrostatic

discharge or hot surfaces that could cause hydrogen gas to ignite.

•Caution labels for hydrogen are attached to the hydrogen storage system components. The

hydrogen storage system is composed of two cylinders and are filled with hydrogen gas. Each tank is

made of aluminum and covered with carbon fiber, which allows the storage tank to sustain high

pressures. This cylinder contains flammable gas under high pressure. Serious injury or death can

result from improper installation, lack of maintenance or overfilling. Do not attempt to remove this

cylinder or any of its fittings from this vehicle. It may contain residual gases under pressure, which

could cause a fire or explosion.

•Warning labels for high voltages are attached to the high voltage components. The color ofthe

high voltage cables and connectors are orange. Do not touch any of these high voltage

components, cables, and connectors without proper Personal Protection Equipment (PPE).

WARNING

NEXO Identification 5

General Vehicle Description

The Hyundai NEXO hydrogen electric vehicle is built on a chassis specifically developed to handle

the fuel cells. The safest method is to assume that the NEXO you respond to is equipped with high

voltage and hydrogen systems because the NEXO is an exclusive hydrogen electric vehicle model.

Using the information provided in this section, responders will be able to identify the NEXO.

Identifying a Hyundai NEXO Vehicle

‘NEXO’ on the trunk and the Blue Drive badge on the side of vehicle

The Hyundai NEXO can be easily identified by the ‘NEXO’ and the ‘Fuel Cell’ badge located on the

trunk lid and the ‘BLUE-DRIVE’ badge on the left side of the vehicle.

Electrocution Risk!

Badging can become hidden after a crash due to damage to the vehicle. Always be sure to utilize

additional methods as necessary to identify the vehicle if there is no badge present.

DANGER

NEXO Identification 6

VIN Number

The Vehicle Identification Number (VIN) identifies an electric vehicle with a “6” displayed in the 8th

position, as shown in the below drawing.

The VIN is embedded on the floor under the passenger seat. The number “6” in the 8th character of

the VIN indicates that it is an electric vehicle with batteries [LiPB 240 V, 6.5 Ah] and a motor [3-

phase AC 113 kw].

XXXXXXX6XXXXXXX

8th digit

NEXO Identification 7

Fuel Cell Power ModuleCompartment

The NEXO has a fuel cell stack cover with

“HYDROGEN” clearly shown on it.

Additionally, there are orange colored high-

voltage electrical cables in the fuel cell power

module compartment.

Vehicle Underside

Orange colored cables are hidden by the under

cover. Some remain visible on the underside of

the vehicle. This cable runs from the rear of

the vehicle to the fuel cell power module

compartment.

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