ISO 23828:2022
(Main)Fuel cell road vehicles — Energy consumption measurement — Vehicles fuelled with compressed hydrogen
Fuel cell road vehicles — Energy consumption measurement — Vehicles fuelled with compressed hydrogen
This document specifies the procedures for measuring the energy consumption and driving range of fuel cell passenger cars and light-duty trucks that use compressed hydrogen.
Véhicules routiers avec pile à combustible — Mesurage de la consommation d'énergie — Véhicules alimentés par hydrogène comprimé
General Information
Relations
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 23828
Third edition
2022-06
Fuel cell road vehicles — Energy
consumption measurement —
Vehicles fuelled with compressed
hydrogen
Véhicules routiers avec pile à combustible — Mesurage de la
consommation d'énergie — Véhicules alimentés par hydrogène
comprimé
Reference number
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms.3
5 Hydrogen measurement accuracy .4
6 Hydrogen consumption measurement . 4
6.1 General . 4
6.2 Pressure method. 4
6.3 Gravimetric method . . 4
6.4 Flow method . 5
7 Fuel consumption test . 5
7.1 Test conditions . 5
7.1.1 General . 5
7.1.2 Ambient temperature. 5
7.1.3 Vehicle conditions . 5
7.1.4 Chassis dynamometer conditions . 6
7.2 Test instrumentation . 6
7.3 Charging of the RESS of externally chargeable FCHEV . 7
7.3.1 Application of a normal charge. 7
7.3.2 Charging the RESS and measuring energy. 8
7.4 Hydrogen consumption tests . 8
7.4.1 General . 8
7.4.2 Vehicle preconditioning . 8
7.4.3 Vehicle soak . 8
7.4.4 Vehicle movement to the test room . 8
7.5 Measurement and calculation over applicable driving test (ADT) . 8
7.5.1 CD state . 8
7.5.2 CS state . 8
7.6 Correction of the test results for FCHEV . 9
7.6.1 General . 9
7.6.2 Allowable range of RESS energy balance . 9
7.6.3 Correction procedure by correction coefficient . 9
8 Calculation of driving range .10
8.1 Non-externally chargeable FCHEV . 10
8.2 Externally chargeable FCHEV . 10
9 Calculation of contribution of electricity and hydrogen for the driving range .10
10 Presentation of results .11
Annex A (normative) Pressure method .12
Annex B (normative) Gravimetric method.14
Annex C (normative) Flow method .16
Annex D (informative) Current method .18
Annex E (informative) Determination of tank surface temperature measuring points .20
Annex F (informative) Test results of hydrogen and electric energy consumption and
driving range of test vehicle .24
Annex G (normative) Calculation of allowable range of RESS energy change .26
Annex H (normative) Linear correction method using a correction coefficient .27
iii
Annex I (normative) Usable amount of hydrogen of FCV and FCHEV .29
Annex J (normative) Test conditions and instrumentation for CD state .31
Annex K (informative) Calculation of electricity and hydrogen contribution .32
Annex L (informative) Fuel consumption measurement by vehicle refuelling .35
Bibliography .37
iv
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 of 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
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 third edition cancels and replaces the second edition (ISO 23828:2013), which has been technically
revised.
The main changes are as follows:
— deletion of Annexes A, B and C (regional tests) because their information is obsolete;
— harmonization of terms and definitions with ISO/TR 8713 and ISO 23274-1;
— addition of a method to correct the hydrogen amount in the external hydrogen supplying line;
— integration of externally chargeable FCHEV;
— calculation of driving range;
— calculation of contribution of RESS and hydrogen fuel for the driving range.
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.
v
INTERNATIONAL STANDARD ISO 23828:2022(E)
Fuel cell road vehicles — Energy consumption
measurement — Vehicles fuelled with compressed
hydrogen
1 Scope
This document specifies the procedures for measuring the energy consumption and driving range of
fuel cell passenger cars and light-duty trucks that use compressed hydrogen.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 10521 (all parts), Road vehicles — Road load
ISO 14687, Hydrogen fuel quality — Product specification
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.
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 https:// www .electropedia .org/
3.1
applicable driving test
ADT
single driving test schedule which is specified for a relevant region
Note 1 to entry: Chassis dynamometer test schedules for a relevant region are the Worldwide Light-duty Test
Cycle (WLTC) or the Urban Dynamometer Driving Schedule (UDDS), for example.
3.2
charge balance of RESS
change of charge in t
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.