prEN ISO 15118-20

Road vehicles - Vehicle to grid communication interface - Part 20: 2nd generation network layer and application layer requirements (ISO/DIS 15118-20:2022)

This document specifies the communication between the electric vehicle (EV), including battery electric vehicle (BEV) and plug-in hybrid electric vehicle (PHEV), and the electric vehicle supply equipment (EVSE). The application layer messages defined in this document are designed to support the electricity power transfer between an EV and an EVSE.
This document defines the communication messages and sequence requirements for bidirectional power transfer.
This document furthermore defines requirements of wireless communication for both conductive charging and wireless charging as well as communication requirements for automatic connection device and information services about charging and control status.
The purpose of this document is to detail the communication between an electric vehicle communication controller (EVCC) and a supply equipment communication controller (SECC). Aspects are specified to detect a vehicle in a communication network and enable an Internet Protocol (IP) based communication between the EVCC and the SECC.

Straßenfahrzeuge - Kommunikationsschnittstelle zwischen Fahrzeug und Ladestation - Teil 20: 2. Generation Anforderungen an das Netzwerk- und Anwendungsprotokoll (ISO/DIS 15118-20:2022)

Véhicules routiers - Interface de communication entre véhicule et réseau électrique - Partie 20: Exigences des couches réseau et application de 2ème génération (ISO/DIS 15118-20:2022)

Cestna vozila - Komunikacijski vmesnik med vozilom in omrežjem - 20. del: Zahteve za omrežno in aplikacijsko plast druge generacije (ISO/FDIS 15118-20:2022)

General Information

• Status: Not Published
• ICS: 43.120 - Electric road vehicles
• Technical Committee: CEN/TC 301 - Electrically propelled road vehicles
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Due Date: 12-Apr-2022
• Completion Date: 12-Apr-2022
• Ref Project: oSIST prEN ISO 15118-20:2022 - Road vehicles - Vehicle to grid communication interface - Part 20: 2nd generation network layer and application layer requirements (ISO/FDIS 15118-20:2022)

RELATIONS

• Revised: EN ISO 15118-2:2016 - Road vehicles - Vehicle-to-grid communication Interface - Part 2: Network and application protocol requirements (ISO 15118-2:2014)
• Effective Date: 27-Feb-2019

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 15118-20:2022
01-marec-2022
Cestna vozila - Komunikacijski vmesnik med vozilom in omrežjem - 20. del:
Zahteve za omrežno in aplikacijsko plast druge generacije (ISO/FDIS 15118-
20:2022)

Road vehicles - Vehicle to grid communication interface - Part 20: 2nd generation

network layer and application layer requirements (ISO/FDIS 15118-20:2022)

Straßenfahrzeuge - Kommunikationsschnittstelle zwischen Fahrzeug und Ladestation -

Teil 20: 2. Generation Anforderungen an das Netzwerk- und Anwendungsprotokoll
(ISO/FDIS 15118-20:2022)

Véhicules routiers - Interface de communication entre véhicule et réseau électrique -

Partie 20: Exigences des couches réseau et application de 2ème génération (ISO/FDIS

15118-20:2022)
Ta slovenski standard je istoveten z: prEN ISO 15118-20
ICS:
35.100.05 Večslojne uporabniške Multilayer applications
rešitve
43.040.15 Avtomobilska informatika. Car informatics. On board
Vgrajeni računalniški sistemi computer systems
oSIST prEN ISO 15118-20:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 15118-20:2022
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oSIST prEN ISO 15118-20:2022
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 15118-20
ISO/TC 22/SC 31
Road vehicles — Vehicle to grid
Secretariat: DIN
communication interface —
Voting begins on:
2022-01-05
Part 20:
Voting terminates on:
2nd generation network layer and
2022-03-02
application layer requirements
Véhicules routiers — Interface de communication entre véhicule et
réseau électrique —
Partie 20: Exigences des couches réseau et application de 2ème
génération
This draft is submitted to a parallel vote in ISO and in IEC.
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 15118-20:2022(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2022
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oSIST prEN ISO 15118-20:2022
ISO/FDIS 15118-20:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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Published in Switzerland
© ISO 2022 – All rights reserved
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oSIST prEN ISO 15118-20:2022
ISO/FDIS 15118-20:2022(E)
Contents Page

1 Scope .......................................................................................................................................................... 1

2 Normative references .......................................................................................................................... 1

3 Terms and definitions .......................................................................................................................... 4

4 Abbreviated terms ............................................................................................................................. 12

5 Conventions .......................................................................................................................................... 15

5.1 Definition of OSI based services .................................................................................................... 15

5.2 Requirement structure ..................................................................................................................... 15

5.3 Usage of references ............................................................................................................................ 16

5.4 Notation used for XML schema diagrams................................................................................... 16

6 Document overview ........................................................................................................................... 16

7 Basic requirements for V2G communication............................................................................ 17

7.1 General information .......................................................................................................................... 17

7.2 Service primitive concept of OSI layered architecture ......................................................... 18

Overview ................................................................................................................................................ 18

Syntax of service primitives ............................................................................................................ 18

7.3 Security concept .................................................................................................................................. 19

General ................................................................................................................................................... 19

Certificate and key management .................................................................................................. 21

Number of root certificates and root validity ........................................................................... 35

Support and application of TLS ..................................................................................................... 37

Firewall .................................................................................................................................................. 38

Protection of the cryptographic keys .......................................................................................... 38

Random number generation .......................................................................................................... 40

7.4 V2G communication states and data link handling ................................................................ 42

7.5 Data link layer ...................................................................................................................................... 46

Data link layer security for WLAN ................................................................................................ 46

7.6 Network link layer ............................................................................................................................. 51

General ................................................................................................................................................... 51

Applicable RFCs, limitations and protocol parameter settings ......................................... 51

IP addressing ........................................................................................................................................ 53

7.7 Transport layer ................................................................................................................................... 54

Transmission control protocol (TCP) ......................................................................................... 54

User datagram protocol (UDP) ...................................................................................................... 55

Transport layer security (TLS) ...................................................................................................... 56

7.8 V2G transfer protocol ........................................................................................................................ 82

General information .......................................................................................................................... 82

Supported ports .................................................................................................................................. 83

Protocol data unit ............................................................................................................................... 83

7.9 Presentation layer .............................................................................................................................. 87

XML and efficient XML interchange (EXI) .................................................................................. 87

Message security ................................................................................................................................. 90

7.10 Application layer .............................................................................................................................. 114

SECC discovery protocol ................................................................................................................ 114

8 Application layer messages ......................................................................................................... 127

8.1 General information and definitions ........................................................................................ 127

8.2 Protocol handshake definition ................................................................................................... 128

Handshake sequence ...................................................................................................................... 128

Message definition supportedAppProtocolReq and supportedAppProtocolRes ..... 130

Semantics description supportedAppProtocol messages................................................. 131

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Message examples ............................................................................................................................ 132

8.3 V2G message definition .................................................................................................................. 133

Overview ............................................................................................................................................. 133

General ................................................................................................................................................. 134

Header definition ............................................................................................................................. 134

Request and response definitions .............................................................................................. 137

Complex data types .......................................................................................................................... 243

8.4 Service selection ............................................................................................................................... 364

General ................................................................................................................................................. 364

General description of configuration parameters ............................................................... 365

Selection of service and service parameters .......................................................................... 366

8.5 V2G communication timing .......................................................................................................... 376

Overview ............................................................................................................................................. 376

Common ............................................................................................................................................... 377

DC service ............................................................................................................................................ 377

Message sequence and communication session ................................................................... 378

Session setup and ready to charge ............................................................................................. 384

V2G message synchronization for AC and DC with IEC 61851-1 signalling ................ 390

V2G message synchronization with IEC 61980-2 signalling for WPT ........................... 397

8.6 Message sequencing and error handling ................................................................................. 397

Overview ............................................................................................................................................. 397

Basic definitions for error handling .......................................................................................... 397

ResponseCode handling ................................................................................................................. 398

Request-response message sequence requirements .......................................................... 409

Multiplexed communication ........................................................................................................ 437

Message sequence diagrams ........................................................................................................ 439

Annex A (normative) Schema definition ................................................................................................. 444

Annex B (normative) Certificate profiles ............................................................................................... 446

B.1 Overview ............................................................................................................................................. 446

B.2 General ................................................................................................................................................. 449

B.2.1 Mandatory versus optional........................................................................................................... 450

B.2.2 Critical versus non-critical............................................................................................................ 451

B.2.3 Common requirements for all certificate profiles ............................................................... 455

B.3 V2G root CA certificate profiles ................................................................................................... 457

B.3.1 Based on curves as defined by [V2G20-2674] ....................................................................... 457

B.3.2 Based on curves as defined by [V2G20-2319] ....................................................................... 458

B.4 Charge point operator certificate profiles .............................................................................. 460

B.4.1 Based on curves as defined by [V2G20-2674] ....................................................................... 460

B.4.2 Based on curves as defined by [V2G20-2319] ....................................................................... 462

B.4.3 Common requirements for charge point operator certificate profiles ........................ 463

B.5 Certificate provisioning service certificate profiles ............................................................ 464

B.5.1 Based on curves as defined by [V2G20-2674] ....................................................................... 464

B.5.2 Based on curves as defined by [V2G20-2319] ....................................................................... 465

B.5.3 Common requirements for certificate provisioning service certificate profiles ...... 467

B.6 e-Mobility service provider certificate profiles .................................................................... 468

B.6.1 Based on curves as defined by [V2G20-2674] ....................................................................... 468

B.6.2 Based on curves as defined by [V2G20-2319] ....................................................................... 471

B.6.3 Common requirements for e-mobility service provider certificate profiles.............. 474

B.7 OEM provisioning certificate profiles ....................................................................................... 476

B.7.1 Based on curves as defined by [V2G20-2674] ....................................................................... 476

B.7.2 Based on curves as defined by [V2G20-2319] ....................................................................... 479

B.7.3 Common requirements for OEM provisioning certificate profiles................................. 482

B.8 Vehicle certificate profiles ............................................................................................................ 483

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B.8.1 Based on curves as defined by [V2G20-2674] ....................................................................... 484

B.8.2 Based on curves as defined by [V2G20-2319] ....................................................................... 485

B.8.3 Common requirements for vehicle certificate profiles ..................................................... 487

B.9 Cross certificate & OCSP signer certificate profiles ............................................................. 488

B.9.1 Based on curves as defined by [V2G20-2674] ....................................................................... 488

B.9.2 Based on curves as defined by [V2G20-2319] ....................................................................... 490

B.9.3 Common requirements for cross certificate & OCSP signer certificate profiles ....... 492

B.10 Private environment certificate profiles ................................................................................ 493

B.10.1 Based on curves as defined by [V2G20-2674] ....................................................................... 493

B.10.2 Based on curves as defined by [V2G20-2319] ....................................................................... 496

B.10.3 Common requirements for private environment certificate profiles .......................... 498

Annex C (normative) Specification of identifiers ................................................................................ 500

C.1 e-Mobility authentication identifier (EMAID) ....................................................................... 500

C.1.1 EMAID syntax .................................................................................................................................... 500

C.2 Provisioning certificate identifier (PCID) ............................................................................... 500

C.2.1 PCID syntax ........................................................................................................................................ 500

C.2.2 PCID semantics ................................................................................................................................. 501

C.3 Supply equipment communications controller identifier (SECCID) ............................. 501

C.3.1 SECCID syntax .................................................................................................................................... 501

C.3.2 SECCID semantics ............................................................................................................................. 502

C.4 Electric vehicle supply equipment ID (EVSEID) ................................................................... 503

C.4.1 EVSEID syntax ................................................................................................................................... 503

C.5 Electric vehicle communication controller ID (EVCCID) ................................................... 503

C.5.1 EVCCID syntax ................................................................................................................................... 503

C.5.2 EVCCID semantics ............................................................................................................................ 504

C.6 Calculation of the check digit ...................................................................................................... 504

Annex D (informative) ACDP ...................................................................................................................... 506

D.1 Coordinate system definition for ACDP with inverted pantograph .............................. 506

D.1.1 Coordinate system definitions .................................................................................................... 506

Annex E (informative) Basic PPD for interoperability ...................................................................... 508

E.1 Overview ............................................................................................................................................. 508

E.2 RFID implementation (recommended) ................................................................................... 508

E.2.1 Functional description ................................................................................................................... 508

Annex F (informative) Message sequencing for renegotiation ...................................................... 511

F.1 Overview ............................................................................................................................................. 511

F.2 Renegotiation after resuming a V2G communication session......................................... 512

Annex G (informative) Association of VAS client to V2G session ................................................... 513

Annex H (informative) Application of certificates .............................................................................. 514

H.1 General information ....................................................................................................................... 514

H.1.1 Overview ............................................................................................................................................. 514

H.1.2 Demands of the OEM ....................................................................................................................... 515

H.1.3 Demands of the secondary actors .............................................................................................. 516

H.1.4 Rationale for decisions in this document ............................................................................... 516

H.1.5 Cross certification............................................................................................................................ 518

H.1.6 Examples of the resulting certificate structure .................................................................... 522

H.2 Simplified certificate management in private environment ........................................... 531

H.2.1 Overview ............................................................................................................................................. 531

H.2.2 Solution for private environments ............................................................................................ 534

H.2.3 Security considerations of using private environment credentials .............................. 538

H.3 Solution for emergency and disaster situations ................................................................... 539

H.4 Use of OEM provisioning certificates ........................................................................................ 539

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H.5 Offline contract certificate installation .................................................................................... 540

H.5.1 Processes ............................................................................................................................................. 541

H.6 Risks of root CA compromise ....................................................................................................... 542

H.7 Security appliances and their associated certificates ......................................................... 543

Annex I (informative) Precision of measurements and tolerances .............................................. 549

Annex J (informative) Absolute pricing examples .............................................................................. 551

J.1 Overview ............................................................................................................................................. 551

J.2 Simple examples ............................................................................................................................... 551

J.2.1 Parking fee only ................................................................................................................................ 551

J.2.2 Energy fee only .................................................................................................................................. 551

J.2.3 Energy and taxes .............................................................................................................................. 552

J.2.4 Minimum and maximum cost ...................................................................................................... 552

J.3 Less simple examples ..................................................................................................................... 553

J.3.1 Different rates for different days ............................................................................................... 553

J.3.2 Different rates for different power levels ............................................................................... 554

J.3.3 Different rates for different power levels including reverse power ............................. 554

J.3.4 Overstay after charging finished ................................................................................................ 555

J.3.5 Stacked prices .................................................................................................................................... 556

Bibliography ..................................................................................................................................................... 559

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oSIST prEN ISO 15118-20:2022
ISO/FDIS 15118-20:2022(E)
Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical

Commission) form the specialized system for worldwide standardization. National bodies that are

members of ISO or IEC participate in the development of International Standards through technical

committees established by the respective organization to deal with particular fields of technical activity.

ISO and IEC technical committees collaborate in fields of mutual interest. Other international

organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the

work.

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 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 or
www.iec.ch/members_experts/refdocs).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO and IEC 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) or the IEC list of patent

declarations received (see https://patents.iec.ch).

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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. In the IEC, see www.iec.ch/understanding-standards.

This document was prepared jointly by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC

31, Data communication, Technical Committee IEC/TC 69, Electrical power/energy transfer systems for

electrically propelled road vehicles and industrial trucks, in collaboration with the European Committee

for Standardization (CEN) Technical Committee CEN/TC 301, Electrically propelled road ve

...