ISO 19453-1:2018

INTERNATIONAL ISO
STANDARD 19453-1
First edition
2018-03
Road vehicles — Environmental
conditions and testing for electrical
and electronic equipment for
drive system of electric propulsion
vehicles —
Part 1:
General
Véhicules routiers — Spécifications d'environnement et essais
de l'équipement électrique et électronique pour les véhicules à
propulsion électrique —
Partie 1: Généralités
Reference number
ISO 19453-1:2018(E)
©
ISO 2018

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ISO 19453-1:2018(E)

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© ISO 2018
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ISO 19453-1:2018(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification by mounting location . 2
4.1 Powertrain . 2
4.2 Passenger compartment . 3
4.3 Luggage compartment/load compartment . 3
4.4 Mounting on exterior/in cavities . 3
4.5 Other mounting location . 3
5 Operating modes . 4
5.1 Operating mode 1 . 4
5.2 Operating mode 2 . 4
5.3 Operating mode 3 . 4
5.4 Operating mode 4 . 4
6 Functional status classification . 4
6.1 General . 4
6.2 Class A . 4
6.3 Class B . 5
6.4 Class C . 5
6.5 Class D . 5
6.6 Class E . 5
7 Tests and requirements . 5
7.1 General . 5
7.2 General test conditions . 5
7.3 Test sequence . 6
8 Designation . 6
8.1 Coding . 6
8.2 Use of Code Z “as agreed” . 7
Annex A (informative) Example of a test plan . 8
Annex B (informative) Example of life test/reliability statement . 9
Bibliography .13
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ISO 19453-1:2018(E)

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
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
A list of all parts in the ISO 19453 series can be found on the ISO website.
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ISO 19453-1:2018(E)

Introduction
The purpose of ISO 19453 is to assist its user in systematically defining and/or applying a set of
internationally accepted environmental conditions, tests and operating requirements based on
the anticipated actual environment which the equipment will be operated in and exposed to during
its life cycle. This document has been developed based on fundamental investigations and vehicle
measurements on voltage class B components. Therefore, its scope is restricted to such components.
However, this document can also be referred to for testing components such as electric motors, inverters
and DC/DC converters used in supply voltage classes other than voltage class B if its applicability has
been verified by, for example, vehicle measurements. The ISO 19453 series is based on the ISO 16750
series and follows the same basic principles, but is dedicated to voltage class B components.
Contrary to the ISO 16750 series, the ISO 19453 series contains no part 2 on electrical testing as those
testing conditions and requirements are handled in ISO 21498.
The following environmental factors have been considered in the development of this document.
— World geography and climate
Electric propulsion vehicles are operated in nearly all land regions of the earth. Significant variations
in environmental conditions due to climatic environment, including diurnal and seasonal cycles, can
therefore be expected. Consideration has been given to worldwide ranges in temperature, humidity,
precipitation and atmospheric conditions including dust, pollution and altitude.
— Type of electric propulsion vehicle
Environmental conditions in and on electric propulsion vehicles can depend on vehicle design
attributes, such as whether to equip an internal combustion engine and/or an electric motor for vehicle
propulsion, vehicle mass, vehicle size, electrical supply voltage and so on. Consideration has been given
to typical series production electric propulsion vehicles, including hybrid electric vehicles, battery
electric vehicles, range extender hybrid electric vehicles and fuel cell vehicles, but not including the
equipment specific for fuel cell systems.
— Vehicle use conditions and operating modes
Environmental conditions in and on the vehicle vary significantly with road quality, types of road
surface, road topography, vehicle use (e.g. commuting, towing, cargo transport, etc.) and driving
habits. Operating modes such as storage, starting, driving, stopping and so on have been considered.
Additionally, it has been taken into account that combustion engine speed distributions differ
significantly for hybrid vehicles with electric driving modes during which the internal combustion
engine is completely shut off.
— Equipment life cycle
Electrical and electronic equipment is also resistant to environmental conditions experienced during
manufacture, shipping, handling, storage, vehicle assembly and vehicle maintenance and repair. Such
conditions and tests (e.g. handling drop test) are within the scope of this document.
— Vehicle supply voltage
For electrical and electronic equipment with different supply voltages, these voltages are considered
for the specification of operating modes applied for testing.
— Component mass and volume
Current components of the drive system of electrically propelled road vehicles tend to be much
larger and heavier than conventional, small and light E/E equipment for which the test conditions are
covered by the ISO 16750 series. The size and mass of components of the electric powertrain have been
considered in this ISO 19453 series, for example, by taking the inertia mass of those components into
account as an effect on the measured excitation during vibration measurements. Also, the size and mass
significantly influence the necessary dwell time at low and high temperatures when applying a thermal
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ISO 19453-1:2018(E)

profile, such as in ISO 19453-4, as it takes much longer to reach the intended temperature in the core of
the component.
— Mounting location in the vehicle
In current or future vehicle concepts, systems/components are mounted in almost any location of the
vehicle. The environmental requirements for each specific application highly depend on its mounting
location. Each location in a vehicle has its distinct set of environmental loads. As an example, the range
of temperatures in the engine compartment differs significantly from the range in the passenger
compartment. This is also true for the vibration loads, except that in this case, not only are the vibration
levels different, but the type of vibration load also varies. Body mounted components are typically
exposed to random vibrations whereas for engine mounted systems/components the additional sine
vibration from the engine is considered. Moreover, devices installed in doors are exposed to a high
number of mechanical shocks from door slamming.
It is desirable for the vehicle manufacturer to group the different environmental load types and
levels in a reasonable number of standard requirement sets. This strategy makes it possible to carry
systems/components from one vehicle project to another. Furthermore, the exact requirement
levels are often unknown when designing a component for a future vehicle concept. The expected
environmental loads are usually compiled from other vehicle concepts with similar conditions. The
grouping is normally done by mounting location, but it is difficult to define the right number of different
mounting locations and respective load profiles, because there is a conflict of aims between having only
few requirement classes and tailoring the requirement levels to each application. The reason is that the
environmental loads are not only depending on the mounting location. There are other major factors
that affect the stress levels for systems/components. For example, body styles, drive-train concepts or
package densities can create absolutely different requirement levels for devices that are installed in
different vehicles at almost the same location.
The purpose of ISO 19453 is to define requirement classes for separate load types. It distinguishes
between electrical, mechanical, thermal, climatic and chemical loads. For each load type, several
requirement classes are defined. Every requirement class is determined by a specific code letter. The
complete environmental requirement set is created by defining the code letter combination. The code
letters are defined in the respective clauses of this document. Additionally, tables in the annexes of each
part show the usual mounting locations and give examples of their respective code letters. For normal
applications, these code letters are used. If an application is very specific and therefore the given code
letter combinations cannot be used, it is possible to create new code letter combinations to serve this
purpose. In case none of the given code letters is useable, new requirement levels can be created by
using the code letter Z. In this case, the specific requirements are defined separately, but it is desirable
not to change the test methods.
At a minimum, the following mounting locations should be considered for a device under test (DUT)
with respect to thermal, mechanical, climatic and chemical loads.
a) Applicability to manufacturer’s responsibility
Due to technology limitations or variations in vehicle design, the vehicle manufacturer can be required
to place a component in a location where it cannot withstand the environmental conditions described
in ISO 19453. Under these circumstances, it is the responsibility of the vehicle manufacturer to provide
the necessary environmental protection.
b) Applicability to wiring harnesses, cables and electrical connectors
Although some environmental conditions and tests in ISO 19453 can be relevant to vehicle wiring
harnesses, cables and connectors, its scope is not sufficient to be used as a complete standard. It is
therefore not recommended that ISO 19453 be directly applied to such devices and equipment.
c) Applicability to parts or assemblies inside equipment
ISO 19453 describes environmental conditions and tests to be applied to electrical and electronic
equipment directly mounted in or on the vehicle. It is not intended for direct application to parts or
assemblies that are part of the equipment. For example, ISO 19453 should not be directly applied to
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ISO 19453-1:2018(E)

integrated circuits (ICs) and discrete components, electrical connectors, printed circuit boards (PCBs),
gauges, etc. that are attached in or on the equipment. Electrical, mechanical, climatic and chemical loads
for such parts and assemblies can be quite different from those described in ISO 19453. Therefore, for
those sub-components, the test conditions of ISO 16750 can be considered as a reference.
On the other hand, it is desirable to use ISO 19453 to help derive environmental conditions and test
requirements for parts and assemblies that are intended for use in road vehicle equipment. For example,
a temperature range of −40 °C to 90 °C may be specified for an assembly contained inside a piece of
equipment having a temperature range of −40 °C to 70 °C and an additional temperature rise of 20 K.
d) Applicability relative to system integration and validation
The user of ISO 19453 is cautioned to understand that the scope of ISO 19453 is limited to conditions
and testing at the equipment level, and therefore does not represent all conditions and testing necessary
for complete verification and validation of the vehicle system. Environmental and reliability testing of
equipment parts and vehicle systems can be required.
For example, ISO 19453 does not necessarily ensure that environmental and reliability requirements
for solder joints, solderless connections, integrated circuits and so on are met. Such items are ensured
at the part, material or assembly level. Additionally, vehicle and system level testing can be required to
validate the equipment in the vehicle application.
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INTERNATIONAL STANDARD ISO 19453-1:2018(E)
Road vehicles — Environmental conditions and testing for
electrical and electronic equipment for drive system of
electric propulsion vehicles —
Part 1:
General
1 Scope
This document specifies requirements for the electric propulsion systems and components with
maximum working voltages according to voltage class B. It does not apply to high voltage battery packs
(e.g. for traction) and systems or components inside. It describes the potential environmental stresse
...