ISO 6469-2:2022

INTERNATIONAL ISO
STANDARD 6469-2
Fourth edition
2022-05
Electrically propelled road vehicles —
Safety specifications —
Part 2:
Vehicle operational safety
Véhicules routiers électriques — Spécifications de sécurité —
Partie 2: Sécurité fonctionelle du véhicule
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Environmental and operating conditions . 3
5 Operational safety . 4
5.1 General . 4
5.2 Driving-enabled mode . 4
5.3 Driving . 4
5.3.1 Indication of reduced propulsion power . 4
5.3.2 Low energy content of RESS. 4
5.3.3 Driving backwards . 5
5.3.4 External sound generation system . 5
5.4 Parking . 6
5.5 Operation of auxiliary electric systems . 6
5.6 Connection of the vehicle to an external electric circuit . 6
6 Owner's manual . 6
7 Information for first responders and emergency services . 6
Annex A (informative) Symbols . 7
Bibliography . 8
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 37,
Electrically propelled vehicles.
This fourth edition cancels and replaces the third edition (ISO 6469-2:2018), which has been technically
revised.
The main changes are as follows:
— introduction of requirements for an external sound generation system;
— introduction of requirements for the operation of auxiliary electric systems;
— addition of an informative annex on standardized symbols for driver information.
A list of all parts in the ISO 6469 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
This document is the second part of the ISO 6469 series that provide safety specifications for electrically
propelled road vehicles.
Electrically propelled road vehicles have different functions and characteristics compared to
conventional vehicles.
This document addresses such characteristics with regard to the operational safety of electrically
propelled road vehicles.
v
INTERNATIONAL STANDARD ISO 6469-2:2022(E)
Electrically propelled road vehicles — Safety
specifications —
Part 2:
Vehicle operational safety
1 Scope
This document specifies requirements for operational safety specific to electrically propelled road
vehicles, for the protection of persons inside and outside the vehicle.
Relevant requirements for motorcycles and mopeds are outside the scope of this document, they are
described in the ISO 13063 series.
This document does not provide comprehensive safety information for manufacturing, maintenance,
and repair personnel.
This document does not consider specific aspects of driving automation features.
NOTE 1 For the definition of the term “driving automation features”, see SAE J3016.
EMC is not covered by this document.
NOTE 2 For EMC see ISO 11451 and IEC 61851-21-1.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
auxiliary electric system
vehicle system, other than for vehicle propulsion, that operates on electric energy
[SOURCE: ISO 6469-3:2021, 3.1]
3.2
case A
connection of an electrically-propelled vehicle (EV) (3.6) to the supply network with a plug and cable
permanently attached to the EV
[SOURCE: IEC 61851-1:2017, 3.1.10]
3.3
case B
connection of an electrically-propelled vehicle (EV) (3.6) to the AC supply network with a cable assembly
detachable at both ends
[SOURCE: IEC 61851-1:2017, 3.1.11]
3.4
case C
connection of an electrically-propelled vehicle (EV) (3.6) to the AC supply network utilizing a cable and
vehicle connector (3.16) permanently attached to the EV charging station
[SOURCE: IEC 61851-1:2017, 3.1.12]
3.5
driving-enabled mode
operating mode in which the vehicle can be moved by its own propulsion system (3.12) by one action
Note 1 to entry: Examples for this action are: pressure to the accelerator pedal, activation of an equivalent
control, release of the brake system.
3.6
electrically-propelled vehicle
EV
vehicle with one or more electric drive(s) for vehicle propulsion
[SOURCE: ISO 6469-3:2021, 3.15]
3.7
external electric circuit
electric circuit which connects to the vehicle power supply circuit (3.18) using the plug [case A (3.2)], the
vehicle inlet [case B (3.3) and case C (3.4)], the ACD counterpart [case D] or the ACD [case E] or electric
circuit which is magnetically coupled with the secondary coil
3.8
external electric power supply
electric power source that is not part of the vehicle for supplying electric energy to a vehicle
[SOURCE: ISO 17409:2020, 3.28]
3.9
external sound generation system
system that provides an acoustic signal to the external environment of the vehicle for the purpose to
provide information to pedestrians
[SOURCE: ISO 16254:2016, 3.3]
Note 1 to entry: Some documents use the equivalent term “acoustic vehicle alerting system (AVAS)”.
3.10
fuel cell system
system, typically containing the following subsystems: fuel cell stack, air processing, fuel processing,
thermal management, water management, and their control
[SOURCE: ISO 6469-3:2021, 3.21]
3.11
FCV
fuel cell vehicle
electrically-propelled vehicle (3.6) with a fuel cell system (3.10) as the power source for vehicle propulsion
Note 1 to entry: An FCV may also have a rechargeable energy storage system (RESS) (3.13) or another power
source for vehicle propulsion.
3.12
propulsion system
combination of power source and powertrain for vehicle propulsion
3.13
RESS
rechargeable energy storage system
rechargeable system that stores energy for delivery of electric energy for the electric drive
EXAMPLE Batteries, capacitors.
[SOURCE: ISO 6469-1:2019, 3.22]
3.14
single-point failure
system failure caused by the failure of only one of its constituent items
3.15
state of charge
SOC
available capacity of a rechargeable energy storage system (RESS) (3.13) or RESS subsystem expressed
as a percentage of rated capacity
[SOURCE: ISO 6469-1:2019, 3.26]
3.16
vehicle connector
part of a vehicle coupler integral with or intended to be attached to the cable assembly
[SOURCE: IEC 62196-1:2014, 3.3.1]
3.17
vehicle inlet
part of a vehicle coupler incorporated in, or fixed to, an electrically propelled vehicle (EV) (3.6)
[SOURCE: IEC 62196-1:2014, 3.3.2]
3.18
vehicle power supply circuit
voltage class B electric circuit which includes all parts that are galvanically connected to the vehicle
inlet (3.16) [case B (3.3), case C (3.4)] or the plug [case A (3.2)] and that is operational when connected to
an external electric power supply (3.8)
4 Environmental and operating conditions
The requirements given in this document shall be met across the range of environmental and operating
conditions for which the electrically propelled vehicle is designed to operate, as specified by the vehicle
manufacturer.
NOTE See the ISO 16750 series, ISO 21498-1 and the ISO 19453 series for guidance.
5 Operational safety
5.1 General
Measures shall be implemented to manage credible single-point failures specific to electrically-
propelled vehicles.
Examples for measures that address single-point failures are:
— normally open switches;
— normally closed fuel valves.
5.2 Driving-enabled mode
Movement of the vehicle by its propulsion system shall be possible only in the driving-enabled mode.
To switch the propulsion system from shut-off condition to driving-enabled mode, at least two deliberate
and distinctive actions shall be necessary.
For reactivation of the propulsion system after its automatic or manual shut-off, the requirements for
activating the driving enabled mode shall apply.
The vehicle shall indicate to the driver that the propulsion system is in driving enabled mode.
A main switch funct
...