ISO 6469-4:2015

Electrically propelled road vehicles — Safety specifications — Part 4: Post crash electrical safety

ISO 6469-4:2015 specifies safety requirements for the electric propulsion systems and conductively connected auxiliary electric systems of electrically propelled road vehicles for the protection of persons inside and outside the vehicle. It specifies electrical safety requirements for vehicle post-crash conditions. It applies to electrically propelled road vehicles with voltage class B electric circuits. It does not apply to motorcycles and mopeds. It does not specify any crash test procedure. The safety requirements of this part of ISO 6469-4:2015 apply to applicable vehicles in accordance with published crash test procedures of each country or region. Applicable vehicles are those vehicles which are explicitly specified in these crash test procedures. It does not provide comprehensive safety information for first responders, emergency services, maintenance, and repair personnel.

Véhicules routiers électriques — Spécifications de sécurité — Partie 4: Exigences de sécurité électrique après accident

General Information

• Status: Published
• Publication Date: 31-Aug-2015
• ICS: 43.120 - Electric road vehicles
• Technical Committee: ISO/TC 22/SC 37 - Electrically propelled vehicles
• Drafting Committee: ISO/TC 22/SC 37 - Electrically propelled vehicles
• Parallel Committee: ISO/TC 43/SC 1 - Noise

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 6469-4
First edition
2015-09-01
Electrically propelled road vehicles —
Safety specifications —
Part 4:
Post crash electrical safety
Véhicules routiers électriques — Spécifications de sécurité —
Partie 4: Exigences de sécurité électrique après accident
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2015 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Applied crash test procedures . 3
5 Electric safety requirements . 3
5.1 General . 3
5.2 Protection against electric shock . 3
5.2.1 General. 3
5.2.2 Voltage limit . 4
5.2.3 Isolation resistance . 4
5.2.4 Physical protection . 4
5.2.5 Electrical energy limit . 5
5.3 Protection against overcurrent . 5
6 RESS electrolyte spillage . 5
7 Testing . 6
7.1 Test conditions . 6
7.1.1 General. 6
7.1.2 Preparation of vehicle or test configuration . 6
7.2 Test procedures for electrical safety . 6
7.2.1 Test setup and equipment . 6
7.2.2 Voltage limit . 7
7.2.3 Isolation resistance . 7
7.2.4 Physical protection .10
7.2.5 Electrical energy limit .11
7.3 Test procedure for RESS electrolyte spillage .13
8 Supplementary information .14
Bibliography .15
Foreword
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Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 21,
Electrically propelled road vehicles.
ISO 6469 consists of the following parts, under the general title Electrically propelled road vehicles —
Safety specifications:
— Part 1: On-board rechargeable energy storage system (RESS)
— Part 2: Vehicle operational safety means and protection against failures
— Part 3: Protection of persons against electric shock
— Part 4: Post crash electrical safety
iv © ISO 2015 – All rights reserved

INTERNATIONAL STANDARD ISO 6469-4:2015(E)
Electrically propelled road vehicles — Safety
specifications —
Part 4:
Post crash electrical safety
1 Scope
This part of ISO 6469 specifies safety requirements for the electric propulsion systems and conductively
connected auxiliary electric systems of electrically propelled road vehicles for the protection of persons
inside and outside the vehicle. It specifies electrical safety requirements for vehicle post-crash conditions.
It applies to electrically propelled road vehicles with voltage class B electric circuits.
It does not apply to motorcycles and mopeds.
It does not specify any crash test procedure. The safety requirements of this part of ISO 6469 apply
to applicable vehicles in accordance with published crash test procedures of each country or region.
Applicable vehicles are those vehicles which are explicitly specified in these crash test procedures.
It does not provide comprehensive safety information for first responders, emergency services,
maintenance, and repair personnel.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 6469-3, Electrically propelled road vehicles — Safety specifications — Part 3: Protection of persons
against electric shock
ISO 20653, Road vehicles — Degrees of protection (IP code) — Protection of electrical equipment against
foreign objects, water and access
ISO/TR 8713, Electrically propelled road vehicles — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TR 8713 and the following apply.
3.1
auxiliary electric system
on-board vehicle system, other than the propulsion system, which operates on electric energy
3.2
barrier
part providing protection against direct contact from any usual direction of access
3.3
conductive part
part capable of conducting electric current
3.4
direct contact
contact of persons with live parts
3.5
electric chassis
conductive parts of a vehicle that are electrically connected and whose potential is taken as reference
3.6
electric drive
combination of traction motor, power electronics, and their associated controls for the conversion of
electric to mechanical power and vice versa
3.7
electric shock
physiological effect resulting from an electric current passing through a human body
3.8
electrically propelled vehicle
vehicle with at least one electric drive for vehicle propulsion
3.9
enclosure
part providing protection of equipment against direct contact from any direction
3.10
exposed conductive part
conductive part of the electric equipment, that can be touched by a test finger according to IPXXB (see
ISO 20653) after removing barriers/enclosures that can be removed without using tools and that is not
normally live, but which may become live under fault conditions
3.11
isolation resistance
resistance between live parts of voltage class B electric circuit and the electric chassis as well as the
voltage class A system
3.12
line conductor
conductor which is electrically energized in normal operation and capable of contributing to the
transmission or distribution of electric energy
3.13
live part
conductor or conductive part intended to be electrically energized in normal operation
3.14
maximum working voltage
highest value of a.c. voltage (rms) or of d.c. voltage which may occur in an electric system under any
normal operating conditions according to manufacturer’s specifications, disregarding transients
3.15
potential equalisation
electric connections of exposed conductive parts of the electric equipment to minimize differences in
potential between these parts
3.16
rechargeable energy storage system
RESS
system that stores energy for delivery of electric energy for vehicle propulsion and which is rechargeable
EXAMPLE Battery, capacitors.
2 © ISO 2015 – All rights reserved

3.17
voltage class A
classification of an electric component or circuit with a maximum working voltage of ≤30 V a.c. (rms) or
≤60 V d.c. respectively
3.18
voltage class B
classification of an electric component or circuit with a maximum working voltage of (>30 and
≤1 000) V a.c. (rms) or (>60 and ≤1 500) V d.c. respectively
3.19
X-capacitors
capacitors located between line conductors of different polarity
3.20
Y-capacitors
capacitors located between line conductor and electric chassis
4 Applied crash test procedures
The safety requirements of this part of ISO 6469 shall apply in accordance with the published crash test
procedures of a country or region for vehicles or test configurations which are explicitly specified in
these crash test procedures.
5 Electric safety requirements
5.1 General
The following requirements shall be fulfilled after a vehicle crash test or after a crash test with a test
configuration according to 4.
NOTE Retention of voltage class B components, e.g. RESS, is not covered in this part of ISO 6469 because it is
not relevant for electrical safety.
5.2 Protection against electric shock
5.2.1 General
After the crash test at least one of the criteria specified in 5.2.2 through 5.2.5 shall be met for each
voltage class B electric circuit. This includes all voltage class B electric circuits which are disconnected
or electrically separated in post-crash situations. For different parts of a circuit, different criteria
specified in 5.2.2 through 5.2.5 may apply.
If the test is performed under the condition that part(s)
...