ISO 15118-10:2025

Road vehicles — Vehicle to grid communication interface — Part 10: Physical layer and data link layer requirements for single-pair Ethernet

This document specifies the physical and data link layer of high-level communication (HLC) between electric vehicles (EV) and electric vehicle supply equipment (EVSE) based on single-pair Ethernet communication. Single-pair Ethernet communication uses differential twisted pair wires that are dedicated and balanced. This document applies to 10BASE-T1S only. This document covers the overall information exchange between all actors involved in electrical energy exchange. The ISO 15118 series applies to charging between EV and EVSE.

Véhicules routiers — Interface de communication entre véhicule et réseau électrique — Partie 10: Exigences relatives à la couche physique et à la couche liaison de données pour Ethernet à paire unique

General Information

• Status: Published
• Publication Date: 05-Mar-2025
• ICS: 43.120 - Electric road vehicles
• Technical Committee: ISO/TC 22 - Road vehicles
• Drafting Committee: ISO/TC 22 - Road vehicles
• Current Stage: 6060 - International Standard published
• Start Date: 06-Mar-2025
• Due Date: 06-Mar-2025
• Completion Date: 06-Mar-2025

Relations

• Consolidates: ISO 21498-1:2021 - Electrically propelled road vehicles — Electrical specifications and tests for voltage class B systems and components — Part 1: Voltage sub-classes and characteristics
• Effective Date: 24-Jun-2023

Standards Content (Sample)

International
Standard
ISO 15118-10
First edition
Road vehicles — Vehicle to grid
2025-03
communication interface —
Part 10:
Physical layer and data link layer
requirements for single-pair
Ethernet
Véhicules routiers — Interface de communication entre véhicule
et réseau électrique —
Partie 10: Exigences relatives à la couche physique et à la couche
liaison de données pour Ethernet à paire unique
Reference number
© ISO 2025
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Conventions . 3
5.1 Definition of OSI based services .3
5.2 Requirement structure .3
6 System architecture . 3
6.1 Communication layers .3
6.1.1 Architecture .3
6.1.2 Layer 2 interfaces .4
6.1.3 Communication media .4
6.1.4 Data SAP .4
6.1.5 Service primitive concept of OSI layered architecture .6
6.2 Physical channel .6
6.2.1 General .6
6.2.2 Nodes .7
6.2.3 Requirements for the physical channel.7
6.2.4 Schematic of the coupling network .7
6.3 System requirements .8
6.3.1 Overview of basic signalling .8
6.3.2 Electric vehicle supply equipment (EVSE) .9
6.3.3 Electric vehicle (EV) . .9
7 Connection coordination . 10
7.1 General .10
7.2 Overview .10
7.3 Plug-in phase .10
7.3.1 General .10
7.3.2 EVSE side .10
7.3.3 EV side .10
7.4 Initialization phase .10
7.5 Loss of communication .10
7.5.1 General .10
7.5.2 EVSE side .11
7.5.3 EV side .11
7.6 Sleep mode and wake-up .11
7.6.1 General .11
7.6.2 Entering sleep mode .11
7.6.3 Wake-up .11
7.7 During a charge pause . 12
8 Timing and constants .12
9 EV-EVSE communication initialization .13
9.1 Overview . 13
9.2 Errors . 13
10 EMC requirements .13
Bibliography . 14

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
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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, SC 31, Data communication,
in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 301,
Road vehicles, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
A list of all parts in the ISO 15118 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 atwww.iso.org/members.html.

iv
Introduction
The looming energy crisis and necessity to reduce greenhouse gas emissions has forced vehicle
manufacturers to find ways to scale down how much energy their vehicles consume. The vehicles they are
currently developing are propelled either entirely or in part by electric energy. If this energy is generated
from renewable sources, this will weaken dependency on oil, improve the global energy efficiency and cut
CO emissions. However, a dedicated charging infrastructure is needed to charge the batteries that power
these vehicles.
Much of the standardization work on dimensional and electrical specifications of the charging infrastructure
and the vehicle interface is already treat
...