ISO/SAE 12906:2024

Road vehicles — Test procedures for electric vehicles to determine charging performance

This document specifies test procedures to determine the charging performance of electric vehicles. This document facilitates clear and consistent comparisons of realistic charging capabilities of electrically propelled vehicles (EVs) via commercially available electric vehicle supply equipment. It provides details about test conditions, test methods and test processes derived from typical use cases. Furthermore, it specifies requirements regarding the information for the vehicle operator. This document is applicable to EVs, including plug-in hybrid EVs. This document does not provide requirements for mopeds and motorcycles. Unless specified otherwise, all test procedures can be applied to AC, DC or wireless charging methods. NOTE Specifications for reverse power transfer are under consideration.

Véhicules routiers — Procédures d'essai des véhicules électriques pour déterminer les performances de charge

General Information

• Status: Published
• Publication Date: 12-Dec-2024
• 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
• Current Stage: 6060 - International Standard published
• Start Date: 13-Dec-2024
• Due Date: 13-Dec-2024
• Completion Date: 13-Dec-2024

Standards Content (Sample)

International
Standard
ISO/SAE 12906
First edition
Road vehicles — Test procedures
2024-12
for electric vehicles to determine
charging performance
Véhicules routiers — Procédures d'essai des véhicules électriques
pour déterminer les performances de charge
Reference number
© ISO/SAE International 2024
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© ISO/SAE International 2024 – All rights reserved
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 3
5 General . 3
6 Test cases and general requirements . 4
6.1 Overview of test cases .4
6.2 General requirements .4
6.2.1 Vehicle manufacturer specifications .4
6.2.2 EV run-in.5
6.2.3 Measurement tolerances and accuracies .5
6.2.4 Determination of indicated SOC .5
6.2.5 Determination of recharged electric range by recharged energy . .6
6.2.6 Determination of charging efficiency .8
6.2.7 Determination of maximum charging power .9
6.3 Test procedures .10
6.3.1 Test procedure for test case Normal Charge .10
6.3.2 Test procedure for test case Fast Charge .11
7 Vehicle operator information . 14
Annex A (informative) Fast Charge at low ambient temperature .15
Annex B (informative) Heavy duty vehicles. 19
Bibliography .23

© ISO/SAE International 2024 – All rights reserved
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 through
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with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
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the aerospace, automotive and commercial-vehicle industries. Standards from SAE International are used to
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This document was jointly prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 37,
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© ISO/SAE International 2024 – All rights reserved
iv
Introduction
The test procedures were derived from typical use cases. Both test procedures and use cases were
established based on the following premises:
— Comparability: the charging performance determined according to this document enables a comparison
of the performance of different electrically propelled vehicles in realistic scenarios. The application of
specific optimizing features to improve the charging performance (e.g. battery thermal preconditioning
based on navigation systems) is taken into account.
— Imitability and plausibility: the possibility to retrace the determined charging performance in principle.
— Reproducibility: the specified test conditions, test methods and test processes ensure reproducibility
within common measurement tolerances. It was important to leave as little space as possible for
inadvertent deviations or manipulations.
The test results serve for information purposes, e.g. for vehicle operator interfaces or manufacturer
specifications.
© ISO/SAE International 2024 – All rights reserved
v
International Standard ISO/SAE 12906:2024(en)
Road vehicles — Test procedures for electric vehicles to
determine charging performance
1 Scope
This document specifies test procedures to determine the charging performance of electric vehicles. This
document facilitates clear and consistent comparisons of realistic charging capabilities of electrically
propelled vehicles (EVs) via commercially available electric vehicle supply equipment. It provides details
about test conditions, test methods and test processes derived from typical use cases. Furthermore, it
specifies requirements regarding the information for the vehicle operator.
This document is applicable to EVs, including plug-in hybrid EVs.
This document does not provide requirements for mopeds and motorcycles.
Unless specified otherwise, all test procedures can be applied to AC, DC or wireless charging methods.
NOTE Specifications for reverse power transfer are under consideration.
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 https:// www .electropedia .org/
3.1
applicable driving test
ADT
driving test provision including test procedure and requirements for homologation in the intended market
EXAMPLE Worldwide harmonized light vehicles test procedure; SAE J1634.
3.2
ADT schedule
collection of one or more driving cycle(s)
EXAMPLE Worldwide light-duty test cycle; urban dynamometer driving schedule.
3.3
DC electric energy consumption
EC
DC
R
EC,DC
energy withdrawn per unit of distance from the RESS (3.9) for operating the EV (3.5) as measured by the
combined test procedure defined in the ADT (3.1)
Note 1 to entry: Charging losses due to AC charging are excluded.

© ISO/SAE International 2024 – All rights reserved
Note 2 to entry: The unit of the distance referred to depends on the specification in the ADT.
Note 3 to entry: In the worldwide light-duty test cycle, the consumption of the combined test procedure is called
EC .
DC,WLTC
3.4
discharged battery energy
DBE
E
DBE
energy removed from the RESS (3.9) during the ADT schedule (3.2)
Note 1 to entry: At the end of the ADT schedule the DBE equals the usable battery energy.
3.5
electrically propelled vehicle
EV
vehicle with one or more electric drive(s) for vehicle propulsion
[SOURCE: ISO 6469-3:2021, 3.15 — The abbreviated term “EV” has been added.]
3.6
EV supply equipment
EVSE
equipment or combination of equipment that provides dedicated functions to supply electric energy from
a fixed electrical installation or supply network to an electrically propelled vehicle (3.5) for the purpose of
charging
[SOURCE: IEC 61851-1:2017, 3.1.1, modified – Examples were deleted.]
3.7
indicated state of charge
indicated SOC
residual capacity of rechargeable energy storage system (3.9) available to be discharged as indicated to the
vehicle operator
Note 1 to entry: Indicated state of charge is normally expressed as a percentage of full charge.
[SOURCE: ISO/TR 11954:2024, 3.11, modified — The term was originally RESS state of charge and “as
indicated to the vehicle operator” has been
...