EN 61851-24:2014

Electric vehicle conductive charging system - Part 24: Digital communication between a d.c. EV charging station and an electric vehicle for control of d.c. charging

IEC 61851-24:2014, together with IEC 61851-23, applies to digital communication between a d.c. EV charging station and an electric road vehicle (EV) for control of d.c. charging, with an a.c. or d.c. input voltage up to 1 000 V a.c. and up to 1 500 V d.c. for the conductive charging procedure. The EV charging mode is mode 4, according to IEC 61851-23. Annexes A, B, and C give descriptions of digital communications for control of d.c. charging specific to d.c. EV charging systems A, B and C as defined in Part 23.

Konduktive Ladesysteme für Elektrofahrzeuge - Teil 24: Digitale Kommunikation zwischen einer Gleichstromladestation für Elektrofahrzeuge und dem Elektrofahrzeug zur Steuerung des Gleichstromladevorgangs

Système de charge conductive pour véhicules électriques - Partie 24: Communication digitale entre la borne de charge à courant continu et le véhicule électrique pour le contrôle de la charge à courant continu

L'IEC 61851-24:2014, avec la CEI 61851-23, s'applique à la communication digitale entre la borne de charge à courant continu pour véhicule électrique et un véhicule électrique (VE) pour le contrôle de la charge à courant continu, avec une tension d'entrée jusqu'à 1 000 V c.a. et jusqu'à 1 500 V c.c. pour la procédure de charge conductive. Le mode de charge du véhicule électrique est le mode 4, selon la CEI 61851-23. Les Annexes A, B et C donnent des descriptions de communications digitales pour le contrôle de la charge à courant continu spécifique aux systèmes A, B et C de charge à courant continu pour véhicule électrique définis dans la Partie 23.

Sistem kabelskega napajanja električnih vozil - 24. del: Digitalna komunikacija med enosmerno (d.c.) EV-napajalno postajo in električnim vozilom za krmiljenje enosmernega (d.c.) napajanja (IEC 61851-24:2014)

Standarda EN IEC 61851-24 in IEC 61851-23 se nanašata na digitalno komunikacijo med polnilno postajo za električna vozila z enosmernim tokom in električnim cestnim vozilom (EV) za nadzor polnjenja z enosmernim tokom z izmenično (a.c.) ali enosmerno (d.c.) vhodno napetostjo do 1000 V a.c. in do 1500 V d.c. Način polnjenja električnih vozil je način 4 v skladu s standardom IEC 61851-23. Ta standard ne zajema polnilnih postaj, ki jih napaja visokonapetostni izmenični tok. Priloge A, B in C podajajo opise digitalnih komunikacij za nadzor polnjenja z enosmernim tokom, značilnega za polnilne sisteme A, B in C za napajanje električnih vozil z enosmernim tokom, kot je določeno v delu 23.

General Information

• Status: Published
• Publication Date: 29-May-2014
• Withdrawal Date: 10-Apr-2017
• ICS: 43.120 - Electric road vehicles
• Technical Committee: CLC/TC 69X - Electrical systems for electric road vehicles
• Drafting Committee: IEC/TC 69 - IEC_TC_69
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 30-May-2014
• Completion Date: 30-May-2014
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Mandate: M/468 - Standardisation mandate addressed to CEN and CENELEC and ETSI concerning the charging of electric vehicles
• Ref Project: SIST EN 61851-24:2014 - Electric vehicle conductive charging system - Part 24: Digital communication between a d.c. EV charging station and an electric vehicle for control of d.c. charging

Relations

• Replaced By: EN IEC 61851-24:2024 - Electric vehicle conductive charging system - Part 24: Digital communication between a DC EV supply equipment and an electric vehicle for control of DC charging
• Effective Date: 23-Jan-2023
• Corrected By: EN 61851-24:2014/AC:2015 - Electric vehicle conductive charging system - Part 24: Digital communication between a d.c. EV charging station and an electric vehicle for control of d.c. charging
• Effective Date: 30-Jun-2015

Overview

EN 61851-24:2014 (identical to IEC 61851-24:2014) specifies the digital communication between a d.c. EV charging station and an electric road vehicle for control of d.c. charging (conductive charging, EV charging mode 4). The standard applies where the charging equipment has an a.c. or d.c. input up to 1 000 V a.c. and 1 500 V d.c.. It defines communication architecture, the charging control process, exchanged information, and includes normative annexes describing system‑specific implementations (systems A, B and C as defined in IEC 61851-23).

Key Topics

• Scope & applicability
  • Digital control of d.c. charging between off‑board charger and vehicle (mode 4).
  • Excludes chargers supplied by high‑voltage a.c. supply as specified by Part 23.
• Digital communication architecture
  • Logical layers and sequence diagrams for charge handshake, charge parameter configuration, charging control and termination.
• Charging control process
  • States and exchanges required to establish, manage and stop d.c. charging sessions.
• Exchanged information
  • Mandatory/optional parameters used during handshake, charging and error handling (summarized in the standard’s tables).
• Physical/data link layer
  • Guidance on applicable link technologies (including CAN bus references) and layer specifications for the system variants.
• System variants
  • Annex A, B and C describe communications for d.c. EV charging systems A, B and C (including sequence diagrams and parameter tables).

Applications & Who Uses It

EN 61851-24 is practical for:

• Charging station manufacturers implementing digital control for d.c. chargers (ensuring interoperability with EVs).
• Vehicle OEMs integrating vehicle-side charging control and protocol handlers.
• System integrators and implementers developing on‑board/off‑board firmware and CAN‑based interfaces.
• Test laboratories & certification bodies validating communication conformance and interoperability.
• Network operators, installers and regulators defining deployment and safety requirements for d.c. charging infrastructure.

Practical uses include protocol design, firmware implementation, sequence validation (handshake → parameter configuration → charging → termination), interoperability testing, and integration with higher-level V2G or energy management systems.

Related Standards

• EN/IEC 61851‑1: General requirements for conductive charging
• EN/IEC 61851‑23: D.C. EV charging station (system definitions A, B, C)
• ISO/IEC 15118 series: Vehicle‑to‑grid communication interface (higher‑level V2G use cases and protocol layers)
• ISO 11898‑1/2: CAN physical and data link layer standards referenced for communication layers

Keywords: EN 61851-24:2014, IEC 61851-24, d.c. charging, digital communication, EV charging station, mode 4, charging control, CAN bus, ISO/IEC 15118.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2014
6LVWHPNDEHOVNHJDQDSDMDQMDHOHNWULþQLKYR]LOGHO'LJLWDOQDNRPXQLNDFLMDPHG
HQRVPHUQRGF(9QDSDMDOQRSRVWDMRLQHOHNWULþQLPYR]LORP]DNUPLOMHQMH
HQRVPHUQHJDGFQDSDMDQMD,(&
Electric vehicle conductive charging system - Part 24: Digital communication between a
d.c. EV charging station and an electric vehicle for control of d.c. charging
Système de charge conductive pour véhicules électriques - Partie 24: Communication
digitale entre la borne de charge à courant continu et le véhicule électrique pour le
contrôle de la charge à courant continu
Ta slovenski standard je istoveten z: EN 61851-24:2014
ICS:
43.120 (OHNWULþQDFHVWQDYR]LOD Electric road vehicles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61851-24

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2014
ICS 43.120
English Version
Electric vehicle conductive charging system - Part 24: Digital
communication between a d.c. EV charging station and an
electric vehicle for control of d.c. charging
(IEC 61851-24:2014)
Système de charge conductive pour véhicules électriques - Konduktive Ladesysteme für Elektrofahrzeuge - Teil 24:
Partie 24: Communication digitale entre la borne de charge Digitale Kommunikation zwischen einer
à courant continu et le véhicule électrique pour le contrôle Gleichstromladestation für Elektrofahrzeuge und dem
de la charge à courant continu Elektrofahrzeug zur Steuerung des
(CEI 61851-24:2014) Gleichstromladevorgangs
(IEC 61851-24:2014)
This European Standard was approved by CENELEC on 2014-04-11. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61851-24:2014 E
Foreword
The text of document 69/273/FDIS, future edition 1 of IEC 61851-24, prepared by IEC/TC 69 "Electric
road vehicles and electric industrial trucks" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN 61851-24:2014.
The following dates are fixed:
• latest date by which the document has (dop) 2015-01-11
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-04-11
• latest date by which the national
standards conflicting with the

document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61851-24:2014 was approved by CENELEC as a European
Standard without any modification.

- 3 - EN 61851-24:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu
Publication Year Title EN/HD Year

IEC 61851-1 2010 Electric vehicle conductive charging system - EN 61851-1 2011
Part 1: General requirements
IEC 61851-23 2014 Electric vehicle conductive charging system - EN 61851-23 2013
Part 23: D.C. electric vehicle charging station

ISO/IEC 15118-1 Road vehicles – Vehicle to grid - -
communication interface -
Part 1: General information and use-case
definition
ISO/IEC 15118-2 Road vehicles – Vehicle to grid - -
communication interface -
Part 2: Technical protocol description and
open systems interconnections (OSI) layer
requirements
ISO/IEC 15118-3 Road vehicles - Vehicle to grid communication - -
interface -
Part 3 Physical layer requirements

ISO 11898-1 2003 Road vehicles - Controller area network - -
(CAN) -
Part 1: Data link layer and physical signalling

ISO 11898-2 2003 Road vehicles - Controller area network - -
(CAN) -
Part 2: High-speed medium access unit

IEC 61851-24 ®
Edition 1.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric vehicle conductive charging system –

Part 24: Digital communication between a d.c. EV charging station and an

electric vehicle for control of d.c. charging

Système de charge conductive pour véhicules électriques –

Partie 24: Communication digitale entre la borne de charge à courant continu et

le véhicule électrique pour le contrôle de la charge à courant continu

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 43.120 ISBN 978-2-8322-1441-1

– 2 – IEC 61851-24:2014 © IEC 2014
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 System configuration . 7
5 Digital communication architecture . 7
6 Charging control process . 7
7 Overview of charging control . 7
8 Exchanged information for d.c. charging control . 8
Annex A (normative) Digital communication for control of d.c. EV charging system A . 10
Annex B (normative) Digital communication for control of d.c. EV charging system B . 20
Annex C (normative) Digital communication for control of d.c. charging system C
(Combined system) . 27
Bibliography . 29

Figure 1 – Digital communication between a d.c. EV charging station and an electric
vehicle for control of d.c. charging . 8
Figure A.1 – Sequence diagram of d.c. charging control communication for system A . 13
Figure A.2 – CAN-bus circuit diagram . 18
Figure A.3 – Dedicated CAN communication between vehicle and d.c. EV charging
station . 19
Figure B.1 – Sequence diagram of d.c. charging control communication for system B . 20

Table 1 – Exchanged information for d.c. charging control . 8
Table A.1 – Communication actions and parameters during d.c. charging control
process between system A station and vehicle (1 of 2) . 11
Table A.2 – Exchanged parameter during d.c. charging control process between
system A station and vehicle (1 of 4) . 14
Table A.3 – The physical/data link layer specifications for system A . 18
Table B.1 – Communication actions and parameters during d.c. charging control
process between system B station and vehicle . 21
Table B.2 – Parameters in charge handshake stage for system B . 22
Table B.3 – Parameters in charge parameter configuration stage for system B . 23
Table B.4 – Parameters in charging stage for system B (1 of 2) . 24
Table B.5 – Parameters in charge ending stage for system B . 25
Table B.6 – Error parameters for system B . 25
Table B.7 – Physical/data link layer specifications for system B . 26
Table C.1 – Required exchanged parameters for d.c. charging control for system C . 28

IEC 61851-24:2014 © IEC 2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –

Part 24: Digital communication between a d.c. EV charging
station and an electric vehicle for control of d.c. charging

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61851-24 has been prepared by IEC technical committee 69:
Electric road vehicles and electric industrial trucks.
The text of this standard is based on the following documents:
FDIS Report on voting
69/273FDIS 69/280/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61851 series, published under the general title Electric vehicle
conductive charging system, can be found on the IEC website.

– 4 – IEC 61851-24:2014 © IEC 2014
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
IEC 61851-24:2014 © IEC 2014 – 5 –
INTRODUCTION
The introduction and commercialisation of electric vehicles has been accelerated in the global
market, responding to the global concerns on CO reduction and energy security.
Concurrently, the development of charging infrastructure for electric vehicles has also been
expanding. As supplementary system of a.c. charging system, d.c. charging is recognized as
an effective solution to extend the available range of electric vehicles, and different d.c.
charging systems are being used over the world. The international standardization in terms of
charging infrastructure including d.c. charging systems is indispensable for the diffusion of
electric vehicles, and this standard is developed for the manufacturers’ convenience by
providing general specifications for control communication protocols between off-board d.c.
charger and electric vehicles.

– 6 – IEC 61851-24:2014 © IEC 2014
ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –

Part 24: Digital communication between a d.c. EV charging
station and an electric vehicle for control of d.c. charging

1 Scope
This part of IEC 61851, together with IEC 61851-23, applies to digital communication between
a d.c. EV charging station and an electric road vehicle (EV) for control of d.c. charging, with
an a.c. or d.c. input voltage up to 1 000 V a.c. and up to 1 500 V d.c. for the conductive
charging procedure.
The EV charging mode is mode 4, according to IEC 61851-23. The charging station supplied
by high voltage a.c. supply is not covered by this standard.
Annexes A, B, and C give descriptions of digital communications for control of d.c. charging
specific to d.c. EV charging systems A, B and C as defined in Part 23.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61851-1:2010, Electric vehicle conductive charging system – Part 1: General
requirements
IEC 61851-23:2014, Electric vehicle conductive charging system – Part 23: DC electric
vehicle charging station
ISO/IEC 15118-1 , Road vehicles – Vehicle to grid communication interface – Part 1: General
information and use-case definition
ISO/IEC 15118-2:— , Road vehicles – Vehicle to grid communication interface – Part 2:
Technical protocol description and open systems interconnections (OSI) layer requirements
, Road vehicles – Vehicle to grid communication interface – Part 3
ISO/IEC 15118-3:—
Physical layer requirements
ISO 11898-1:2003, Road vehicles – Controller area network (CAN) – Part 1: Data link layer
and physical signalling
ISO 11898-2:2003, Road vehicles – Controller area network (CAN) – Part 2: High-speed
medium access unit
IEC 61851-24:2014 © IEC 2014 – 7 –
3 Terms and definitions
For the purpose of this document, the terms and definitions given in IEC 61851-1 and
IEC 61851-23 as well as the following apply.
3.1
digital communication
digitally encoded information exchanged between a d.c. EV charging station and an EV, as
well as the method by which it is exchanged.
3.2
parameter
single piece of information relevant to charging control, and that is exchanged between a d.c.
EV charging station and an EV using a form of digital communication
3.3
signal
data element that is communicated between a d.c. EV charging station and an EV using any
means other than digital communication
4 System configuration
The system configuration shall be in accordance with 102.2 of IEC 61851-23:—.
5 Digital communication architecture
In this standard, two digital communication architectures are used:
– one, based on CAN using a dedicated data communication circuit; CAN protocol is given
in ISO 11898-1; refer to Annex A and Annex B for specific implementation details; and
– the other, based on Homeplug Green PHY™ over the control pilot line; refer to Annex C
for specific implementation details.
6 Charging control process
The charging control process shall be in accordance with 102.5 of IEC 61851-23:—.
7 Overview of charging control
The digital communication of d.c. charging control covered by this standard is as shown in
Figure 1. This standard does not cover the control protocol internal to the d.c. EV charging
station, nor the vehicle, such as power control protocol for a.c./d.c. inverter of d.c. EV
charging station and battery management control in the vehicle.

______________
Homeplug Green PHY ™ is an example of a suitable product available commercially. This information is given for
the convenience of users of this document and does not constitute an endorsement by IEC of this product.

– 8 – IEC 61851-24:2014 © IEC 2014

IEC 61851-24
VCCF
DCCCF
Digital (Vehicle
Digital
(DC
communication charging
communication
charging
interface control
interface
control
function)
function)
Controller
DC.EV charging station Electric vehicle
IEC  0678/14
Figure 1 – Digital communication between a d.c. EV charging
station and an electric vehicle for control of d.c. charging
8 Exchanged information for d.c. charging control
This clause describes information which shall be exchanged between a d.c. EV charging
station and a vehicle during the charging process according to IEC 61851-23. The information
in Table 1 is common to all systems described in Annexes A, B and C. Each information listed
in Table 1 is defined as a parameter in each annex. Each system may need additional
parameters, and these parameters are defined in each annex.
Table 1 – Exchanged information for d.c. charging control
Relevant
requirement
No. Information Description in IEC 61851-23:—
(unless specified as
IEC 61851-1)
Current request for the controlled Exchange of current value requested by
a-1
current charging (CCC) system EV
6.4.3.101
Voltage request for the controlled Exchange of voltage value requested by DC supply
a-2
voltage charging (CVC) system EV
- 6.4.3.101
DC supply
- 6.4.3.105
Compatibility
Maximum rated voltage of d.c. EV Exchange of maximum rated voltage value
a-3
assessment
charging station of d.c. EV charging station
- 6.4.3.107
Protection against
overvoltage at the
battery
- 6.4.3.101
DC supply for EV
Maximum rated current of d.c. EV Exchange of maximum rated current value
a-4
- 6.4.3.105
charging station of d.c. EV charging station
Compatibility
assessment
Exchange of software version of a
b-1 Communication protocol
charging system
6.4.3.105
Exchange of maximum voltage limit value
b-2 Maximum voltage limit of EV
of vehicle.
Compatibility
assessment
EV minimum current limit, only for
b-3 the controlled voltage charging Under consideration.
(CVC) system
IEC 61851-24:2014 © IEC 2014 – 9 –
Relevant
requirement
No. Information Description in IEC 61851-23:—
(unless specified as
IEC 61851-1)
Exchange of the result of insulation test
6.4.3.106
before charging
c Insulation test result
Insulation test before
- If insulation test fails, a signal is sent that
charging
charging is not allowed.
6.4.3.110
Exchange of information on short circuit
d Short circuit test before charging
Short circuit test
test before charging
before charging
6.4.3.111
Exchange of information on charge stop
e Charging stopped by user command by the user of d.c. EV charging
User initiated
station
shutdown
6.4.4.2 (of
IEC 61851-1)
Exchange of EVSE real time available load
EVSE real time available load
f current for demand management. Required
Detection/adjustment of
current (optional)
for system providing that function.
the real time available
load current of EVSE
Detection of loss of digital communication
9.4
- If a receiver does not get information
g Loss of digital communication
expected to receive within time out period,
Breaking capacity
it is considered as loss of digital
communication.
Notification of zero current confirmed
- Station informs EV that low current
h-1 Zero current confirmed 102.5
condition has been met (to allow connector
Charging control
unlocking)
process and state
Exchange of information on the whole
h-2 Welding detection
process of welding detection
– 10 – IEC 61851-24:2014 © IEC 2014
Annex A
(normative)
Digital communication for control
of d.c. EV charging system A
A.1 General
This annex shows the specification of digital communication for control of the d.c EV
charging station of system A (in this annex, referred to as "system A station" or "station") as
specified in Annex AA of IEC 61851-23:—. More detailed information on system A is defined
in JIS/TSD0007.
A.2 Digital communication actions during charging control process
The communication actions and parameters according to the charging control process as
defined in Table 103 of IEC 61851-23:— are shown in Table A.1.

IEC 61851-24:2014 © IEC 2014 – 11 –
Table A.1 – Communication actions and parameters during d.c. charging
control process between system A station and vehicle (1 of 2)
Charging Parameter
Digital
a
control State High level action at system level
communication action
From d.c. EV charging station From vehicle
stage
DC-A Vehicle unconnected None N/A N/A
DC-B1 Connector plugged in None N/A N/A
Wake up of DCCCF and VCCF None None (default CAN)
DC-B1
Preparation for digital
Communication data initialization (default CAN) (default CAN)
communication
– Control protocol number
– Control protocol number – Rated capacity of battery
Communication established,
– Available output voltage – Maximum battery voltage
DC-B1→ Exchange of charging control
parameters exchanged, and
DC-B2 parameters
– Available output current – Maximum charging time
compatibility checked
– Battery incompatibility – Target battery voltage
– Vehicle charging enabled
DC-B2 Notification of connector
Connecto
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