SIST-TS CLC/TS 50457-2:2008

Conductive charging for electric vehicles -- Part 2: Communication protocol between off-board charger and electric vehicle

This Technical Specification applies to the communication data link between external charger and electric road vehicle for the charging procedure, using the most common communication link. This Part 2 applies to communication data link between the off-board charging system with direct current and electric road vehicles. The aspects covered are the physical layer, the data link layer and the communication applicative layer. This Technical Specification does not cover communication between dedicated off-board charger and their electric vehicle. Annex A gives an example of normal operation.

Konduktive Ladung von Elektrofahrzeugen -- Teil 2: Kommunikationsprotokoll zwischen externem Ladegerät und Elektrofahrzeug

Charge conductive pour véhicules électriques -- Partie 2: Protocole de transmission entre le chargeur extérieur et le véhicule électrique

Polnjenje po kablu pri električnih vozilih - 2. del: Komunikacijski protokol med zunanjim polnilnikom in električnim vozilom

General Information

• Status: Withdrawn
• Publication Date: 16-Apr-2008
• Withdrawal Date: 12-Feb-2018
• ICS: 35.240.60 - IT applications in transport
• ICS: 43.120 - Electric road vehicles
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 13-Feb-2018
• Due Date: 08-Mar-2018
• Completion Date: 13-Feb-2018
• Ref Project: CLC/TS 50457-2:2008 - Conductive charging for electric vehicles - Part 2: Communication protocol between off-board charger and electric vehicle

Relations

• Replaces: SIST ENV 50275-2-4:2002 - Conductive charging for electric vehicles -- Part 2-4: Communication protocol between off-board charger and electric vehicle
• Effective Date: 01-Dec-2008
• Replaces: SIST ENV 50275-2-4:2002 - Conductive charging for electric vehicles -- Part 2-4: Communication protocol between off-board charger and electric vehicle
• Effective Date: 29-Jan-2023
• Revised: SIST ENV 50275-2-4:2002 - Conductive charging for electric vehicles -- Part 2-4: Communication protocol between off-board charger and electric vehicle
• Effective Date: 06-May-2014

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS CLC/TS 50457-2:2008
01-junij-2008
1DGRPHãþD
SIST ENV 50275-2-4:2002
3ROQMHQMHSRNDEOXSULHOHNWULþQLKYR]LOLKGHO.RPXQLNDFLMVNLSURWRNROPHG
]XQDQMLPSROQLOQLNRPLQHOHNWULþQLPYR]LORP
Conductive charging for electric vehicles - Part 2: Communication protocol between off-
board charger and electric vehicle
Konduktive Ladung von Elektrofahrzeugen - Teil 2: Kommunikationsprotokoll zwischen
externem Ladegerät und Elektrofahrzeug
Charge conductive pour véhicules électriques - Partie 2: Protocole de transmission entre
le chargeur extérieur et le véhicule électrique
Ta slovenski standard je istoveten z: CLC/TS 50457-2:2008
ICS:
35.240.60 Uporabniške rešitve IT v IT applications in transport
transportu in trgovini and trade
43.120 (OHNWULþQDFHVWQDYR]LOD Electric road vehicles
SIST-TS CLC/TS 50457-2:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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TECHNICAL SPECIFICATION
CLC/TS 50457-2

SPÉCIFICATION TECHNIQUE
March 2008
TECHNISCHE SPEZIFIKATION

ICS 35.240.60; 43.120 Supersedes ENV 50275-2-4:1998


English version


Conductive charging for electric vehicles -
Part 2: Communication protocol between off-board charger
and electric vehicle



Charge conductive  Konduktive Ladung
pour véhicules électriques - von Elektrofahrzeugen -
Partie 2: Protocole de transmission Teil 2: Kommunikationsprotokoll zwischen
entre le chargeur extérieur externem Ladegerät und Elektrofahrzeug
et le véhicule électrique






This Technical Specification was approved by CENELEC on 2007-03-01.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to
make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting
national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.



CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 50457-2:2008 E

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CLC/TS 50457-2:2008 – 2 –
Foreword
This Technical Specification was prepared by the CENELEC Reporting Secretariat 69, Electric road
vehicles and electric industrial trucks.
The text of the draft was submitted to vote in accordance with the Internal Regulations, Part 2,
Subclause 11.3.3.3 and was approved by CENELEC as CLC/TS 50457-2 on 2007-03-01.
This Technical Specification is to be used in conjunction with EN 61851-1.
This Technical Specification supersedes ENV 50275-2-4:1998.
In the framework of the conversion of ENV 50275-2-4, Clause 2 has been updated.
The following date was fixed:
– latest date by which the existence of the CLC/TS
has to be announced at national level (doa) 2008-07-01
__________

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– 3 – CLC/TS 50457-2:2008
Contents
Page
Intr oduc tion . 4
1 Scope . 5
2 Normative references . 5
3 Definitions . 5
4 Off-board charging system . 5
5 Communication interchange . 6
6 Service definition . 7
7 Communication session . 8
8 Coding implem entation . 12
Annex A (informative) Communication: Example of normal operation . 22
Table 1 – List of services used . 8
Table 2 – Use of services . 9

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CLC/TS 50457-2:2008 – 4 –
Introduction
This Technical Specification "Conductive charging for electric vehicles" is published in separate parts
according to the following structure:
This Technical Specification covers the physical, electrical and performance requirements concerning
devices for the charging system, when they are not already standardized.
Part 1: D.C. charging station.
Part 2: Communication protocol between off-board charger and electric vehicle.

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– 5 – CLC/TS 50457-2:2008
1 Scope
This Technical Specification applies to the communication data link between external charger and electric
road vehicle for the charging procedure, using the most common communication link.
This Part 2 applies to communication data link between the off-board charging system with direct current
and electric road vehicles.
The aspects covered are the physical layer, the data link layer and the communication applicative layer.
This Technical Specification does not cover communication between dedicated off-board charger and
their electric vehicle.
Annex A gives an example of normal operation.
2 Normative references
The following referenced documents are indispensable for the application 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 14229  Road vehicles - Diagnostic systems - Diagnostic services specifications
ISO 14230-1 Keyword Protocol 2000 – Part 1: Physical layer
ISO 14230-2  Keyword Protocol 2000 – Part 2: Data link layer
ISO 14230-3  Keyword Protocol 2000 – Part 3: Application layer
3 Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
vehicle charging control unit (VCCU)
system embedded in the electric vehicle able to command and control the charging parameters of the
off-board charger
3.2
charging parameters
parameters including set points needed by the off-board charger to generate a current adapted to the
vehicle battery
3.3
charging values
values measured during charging process

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CLC/TS 50457-2:2008 – 6 –
4 Off-board charging system
4.1 General overview
Electric vehicles will be equipped with different technologies, voltage and charging current batteries.
In order to avoid any error during charging and to guarantee that the off-board charger will be able to
charge all existing and future batteries, the charge shall be managed by the vehicle.
Any vehicle to be connected to a general purpose off-board charging system must include a charging
control unit able to manage the charging process.
4.2 Charging process
The off-board charger shall be able to supply controlled DC voltage and/or current to the vehicle battery.
The charging values current and voltage shall be measured at least by the off-board charger.
If the vehicle charging control unit also makes this measurement, a full redundancy system could be
established to achieve a high safety charging system.
– The charging parameters shall be established by the vehicle charging control unit and sent to
off-board charger in order to be used as set points.
– The charging measured values will be sent by the off-board charger to the vehicle charging control
unit.
4.3 Safety process
The start of the charging process shall be allowed by both the off-board charger and the vehicle charging
control unit.
The charging process can be stopped at any time by the off-board charger or the vehicle charging control
unit and shall be stopped in case of communication loss.
5 Communication interchange
5.1 Protocols basis
The standard data interchange is based on ISO 14230.
5.2 Adaptation for off-board charging application
The scope of ISO 14230 concerns requirements for diagnostic systems implemented on a serial data link
layer, which allows a tester to control diagnostic functions in and on vehicle electronic control unit. The
same protocol is used for the communication between an electric vehicle and an off-board charger for the
charging procedure. After the initialization phase by the OBC, the VCCU shall control the charging
process of the OBC. Contrarily to communication according to ISO 14230 where the server and the client
are fixed during all the session, the roles are definitively reversed after the initialization phase.
5.3 Initialization header values
Initialization header values are those defined in ISO 14230-2 except for those specified hereafter.

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5.3.1 Initialization mode
The initialization mode is 5 bauds only.
5.3.2 Address
The address sent to open the communication to the vehicle charging control unit shall be 66 h (functional
address).
NOTE  66 h is the value 66 in hexadecimal code.
5.3.3 Key bytes
The key bytes are defined in accordance with ISO 14230-2 with for KB1:
AL0 = 1
AL1 = 0
HB0 = 1
HB1 = 0
TP0 = 1
TP1 = 0
That is to say the following two key bytes:
KB2 KB1 Hexadecimal code Decimal code
10001111 11010101 8FD5 2005

KB2 is the most significative key byte.
The key bytes will define the state of the protocol; any change in the protocols for future use will change
the key bytes.
5.4 Message structure
5.4.1 Message length
The maximum length for charging application shall be 16 bytes (included header and check-sums).
5.4.2 Message header values
The message header values shall be changed and defined as follows:
− number of header bytes: 1 as defined in 8.1.2.

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CLC/TS 50457-2:2008 – 8 –
6 Service definition
6.1 Basis
The services definition is based upon the draft of ISO 14229 with the following main differences:
− diagnostic is hereby replaced by data interchange;
− client (tester) is replaced by the vehicle charging control unit (VCCU);
− server (ECU) is replaced by the off-board charger (OBC);
− as there is only one server, no server identifier parameter shall be provided.
6.2 List of services used
Table 1 – List of services used
Services of ISO 14229 Generic services Generic services
used for this application (client) (server)
Diagnostic management TesterPresent TestDevicePresent
StopDiagnosticSession StopSession
Specific code StopSessionRequest
Data transmission ReadDataByLocalIdentifier ChargerCharacteristics
 ChargerIdentification
ReadDataByLocalIdentifier VehicleIdentification
Stored data transmission ReadDiagnosticTrouble ReadDiagnosticTrouble
Codes Codes
Input/Output Control InputOutputControlByLocaSetSafetyLimits
lIdentifier
 SetpointAdjust
 DisplayMessage
 StartCharging
 StopCharging

6.3 Message interchange rules
After initialization, at any time the server is waiting for a request.
Any request sent by the client must be acknowledged by the server.
The server has the possibility to stop the session by using the generic StopSessionRequest answer.
7 Communication session
In this clause the generic messages to be sent are written in italics.

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7.1 Phases
The communication sequence uses 7 main steps:
a) communication opening;
b) charger identification;
c) vehicle identification;
d) starting charging process;
e) charging process;
f) ending charging process;
g) closing communication.
The use of services, for each step, is detailed hereafter.
Table 2 – Use of services
Communi- Charger Vehicle Safety Starting Charging Stopping End of
cation identifi- identifi- limits charging process charging commu-
Opening cation cation process process nication
(a) (b) (c) (d1) (d2) (e) (f) (g)
ChargerCharacteristics M (b) A F F F F F F
ChargerIdentification F A F F F F F F
VehicleIdentification F M (c) A F F F F F
ReadDiagnosticTroubleCodes F A A A A A A F
DisplayMessage F A A A A A A F
SetSafetyLimits F F M (d1) A F F F F
StartCharging F F F M (d2) A A A (d2) F
SetpointAdjust F F F F M (e) A F F
StopCharging F F F F F A (f) A F
StopSession A (g) A (g) A (g) A (g) A (g) A (g) A (g) F
StopSessionRequest A A A A A A A F
TestDevicePresent A A A A A A A F
A = Allowed,
A(x) = Allowed, go to step (x),
F = Forbidden,
M(x) = Mandatory, go to step (x).

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CLC/TS 50457-2:2008 – 10 –
7.2 Basic session sequence
7.2.1 Communication opening
The off-board charger starts the initialization sequence as defined in ISO 14230-2.
Direction OBC->VCCU VCCU->OBC OBC->VCCU VCCU->OBC
Content 66h 55h KB1 KB2 70h 99h
5 Bd 10,4 kBd
Speed
At the end of the initialization sequence, the VCCU becomes the master and shall manage all the other
sequences by sending appropriate requests to the OBC.
7.2.2 Charger identification
ChargerCharacteristics
This request is used to inform the VCCU of the major characteristics of the OBC ChargerIdentification.
This request is used to identify the OBC (for instance: OBC manufacturer, OBC owner, OBC version.)
7.2.3 Vehicle identification
VehicleIdentification
This service intends to identify the vehicle. It can be used for instance to provide the charger with an
access control facility, it can identify the version of the communication protocol. In case of an unauthorised
vehicle, the OBC shall answer to the request with a StopSessionRequest message. Any further request
request in this session shall get the same answer.
7.2.4 Starting charging process
SetSafetyLimits
The OBC shall not be allowed to supply any power before receiving this request.
StartCharging
From receiving this request, the OBC current setpoint is reset to zero and the OBC shall be ready to
supply power to the battery.
7.2.5 Charging process
SetpointAdjust request sent by the VCCU.
At any time the VCCU can temporarily disconnect the power by using a StopCharging request. The
charging process will then be resumed using a StartCharging request.

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7.2.6 Ending charging process
This can occur in two different ways:
− from VCCU (normal end of process),
the VCCU shall send a StopSession request;
− from OBC (for safety reasons or elapsed credit time for instance),
any request other than StopSession shall get the StopSessionRequest answer.
7.2.7 End of communication
After echoing a StopSession request, the OBC will remain idle till a next initialization.
7.3 Other functions
TestDevicePresent can be used
...