IEC 61851-24:2014
(Main)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
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. The contents of the corrigendum of June 2015 have been included in this copy.
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. Le contenu du corrigendum de juin 2015 a été pris en considération dans cet exemplaire.
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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
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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
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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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.
The contents of the corrigendum of June 2015 have been included in this copy.
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.
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
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
______________
To be published.
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
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.
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
Connector locked – Vehicle connector lock None
locked status
→DC-B3
DC-B3 Insulation test for d.c. power line None Charging system malfunction None
Pre-charge (depending on the system
DC-B3 N/A N/A N/A
architecture)
Initialization
Charge
Handshaking
preparation
– 12 – IEC 61851-24:2014 © IEC 2014
Table A.1 (2 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-C or Notification of vehicle main
Vehicle side contactors closed None None
DC-D contactor closed status
– Station status
– Output voltage
– Charging current request
– Output current
DC-C or Notification of request value of
Charging by current demand (for CCC) – Charging system fault
DC-D charging current (or voltage)
– Remaining charging time
– Vehicle shift lever position
– Station malfunction
– Charging system malfunction
DC-C or
Charging by voltage demand (for CVC) N/A N/A N/A
DC-D
– Station status
– Charging stop control
DC-C,(D) Request of energy transfer
Current suppression Vehicle charging enabled
→DC-B’1 shut-off
– Output voltage
– Output current
– Station status
Notification of energy transfer
DC-B’1 Zero current confirmed
shut-off
– Charging system malfunction
DC-B’1→ None
Welding detection (by vehicle) None
DC-B’2
DC-B’2 Vehicle side contactors open None None None
DC-B’2 DC power line voltage verification Notification of present voltage Output voltage None
Notification of connector
DC-B’3 Connector unlocked Vehicle connector lock None
unlocked status
Terminate the digital
DC-B’4 End of charge at communication level None None
communication
DC-A Connector unplugged N/A N/A
a
The order of actions does not refer to the procedure of charging control process.
Shutdown Energy transfer
A.3 Digital communication of d.c. charging control
The parameters for digital communication of d.c. charging control shall be exchanged
according to the sequence diagram as shown in Figure A.1.
DC. EV charging station Signal / digital data Vehicle
Start request
Switch(d1):ON
signal sensing device(f):ON
Transmit "Charging Start (CP)" signal Receive "Charging Start (CP)" signal
"Charging Start (CP)" signal
Receive initial vehicle digital data and
Start digital communication
transmit charger digital data in return
Digital communication
Process the information for charge control Process the information for charge control
before charging (battery compatibility, charging before charging (on-board battery information,
Digital communication
time calculation etc.)
maximum charging time etc.)
Signal sensing device(j):ON switch(k):ON
"Charging Permission(CP3)" signal
Transmit the signal and parameter of vehicle
Lock vehicle connector setup completion
"Vehicle Charging Enabled" flag
Digital communication
Check that EV contactors are surely opened
(voltage of d.c. power line is 10 V or less)
Isolation test on d.c. power line
Check the termination of isolation test
(Voltage of d.c. power line is 20 V or less)
Switch(d2):ON signal sensing device(g):ON
Transmit "Charging Start (CP2)" signal Close EV contactors 'c'
"Charging Start (CP2)" signal
Start charging current output Transmit "Charging Current Request"
Digital communication
Charging completed
Signal sensing device(j):OFF switch(k):OFF
Transmit the signal and parameter of charging
Stop charging
"Vehicle Charging Enabled" flag stop request
"Charging Stop Control" flag
Digital communication
Check that d.c. current is 5 A or less
Check that voltage of d.c. power line is
Open EV contactors 'c'
10 V or less
Change "Vehicle Connector Lock" flag to 0
Unlock vehicle connector Terminate digital communication
Digital communication
Terminate digital communication
IEC
For symbols, see Table AA.1 of IEC 61851-23:2014.
Figure A.1 – Sequence diagram of d.c. charging control communication for system A
– 14 – IEC 61851-24:2014 © IEC 2014
A.4 Parameter definition
The definition of parameters during d.c. charging control process are shown in Table A.2.
Table A.2 – Exchanged parameter during d.c. charging
control process between system A station and vehicle (1 of 4)
Data
Item in CAN ID Resolution
Parameter Content Source Destination update Unit Status flag
Table 1 ID.byte(bit) (range)
rate
The maximum voltage value at the vehicle
Maximum battery H'100.4, System A
b-2 inlet terminals, at which the station stops EV 100 ms V - 1 V/bit
voltage H'100.5 station
charging to protect the vehicle battery
Rated capacity of H'101.5, System A
Rated capacity of battery EV 100 ms kWh - 0,1 kWh/bit
battery H'101.6 station
Fixed value for charging rate indication,
Constant of charging System A 1 %/bit (100 %:
which is the maximum charging rate (100 %) H'100.6 EV 100 ms %
rate indication station fixed)
of vehicle battery
Maximum charging
Maximum charging time permitted by EV, set System A 10 s/bit
time H'101.1 EV 100 ms s -
by 10 s station (0 to 2 540 s)
(set by 10 s)
Maximum charging
Maximum charging time permitted by EV, set System A 1 min/bit
time H'101.2 EV 100 ms min
by minute station (0 to 255 min)
(set by minute)
Estimated charging Estimated remaining time before the end of System A 1 min/bit
H'101.3 EV 100 ms min -
time charging calculated by EV station (0 to 254 min)
Control protocol Software version of control protocol to which System A 1/bit
b-1 H'102.0 EV 100 ms -
number EV corresponds station (0 to 255)
Targeted charging voltage at the vehicle inlet H'102.1, System A 1 V/bit
Target battery voltage EV 100 ms V -
terminals H'102.2 station (0 to 600 V)
Charging-current- Current value requested by EV during System A 1 A/bit
a-1 H'102.3 EV 100 ms A -
request charging station (0 to 255 A)
Table A.2 (2 of 4)
Data
Item in CAN ID Resolution
Parameter Content Source Destination update Unit Status flag
Table 1 ID.byte(bit) (range)
rate
System A 1 %/bit
Charging rate Charging rate of vehicle battery H'102.6 EV 100 ms %
station (0 % to 100 %)
Vehicle charging Status flag indicating charge permission System A 0: disabled,
g H'102.5(0) EV － －
enabled status of EV station 1: enabled
0: “Parking”
Vehicle shift lever System A position,
Status flag indicating the shift lever position H'102.5(1) EV － －
position station 1: other
position
0: normal,
Status flag indicating a malfunction caused System A
Charging system fault H'102.5(2) EV － －
by EV or the station, and detected by EV station
1: fault
0: EV contactor
closed or
during welding
detection,
System A
Vehicle status Status flag indicating the EV contactor status H'102.5(3) EV － － 1: EV contactor
station
open or
welding
detection
finished
0: no request,
Normal stop request Status flag indicating the request of EV to System A
H'102.5(4) EV － － 1: request to
before charging stop charging control station
stop
Status flag indicating whether or not the
System A 0:normal,
Battery overvoltage vehicle battery voltage exceeds the H'102.4(0) EV － －
station 1: fault
maximum limit specified by EV
Status flag indicating whether or not the
System A 0:normal,
Battery undervoltage vehicle battery voltage is less than the lower H'102.4(1) EV － －
station 1:fault
limit specified by EV
– 16 – IEC 61851-24:2014 © IEC 2014
Table A.2 (3 of 4)
Data
Item in CAN ID Resolution
Parameter Content Source Destination update Unit Status flag
Table 1 ID.byte(bit) (range)
rate
Status flag indicating whether or not the
Battery current System A 0:normal,
output current deviates from EV requested H'102.4(2) EV － －
deviation error station 1: fault
current
Status flag indicating whether or not the
High battery System A 0:normal,
temperature of vehicle battery exceeds the H'102.4(3) EV － －
temperature station 1:fault
maximum limit
Status flag indicating whether or not the
Battery voltage System A 0:normal,
vehicle battery voltage deviates from the H'102.4(4) EV － －
deviation error station 1: fault
output voltage measured by the station
0:not
supporting
vehicle welding
EV contactor welding
Identifier indicating whether or not the station System detection,
h-2 detection support H'108.0 EV 100 ms
deals with EV contactor welding detection A station 1 or more:
identifier
supporting
vehicle welding
detection
Available output Maximum output voltage value at the vehicle H'108.1, System 1 V/bit
a-3 EV 100 ms V -
voltage connector terminals H'108.2 A station (0 to 600 V)
Available output System 1 A/bit
a-4 Maximum output current value of the station H'108.3 EV 100 ms A -
current A station (0 to 255 A)
Threshold voltage to stop the charging H'108.4, System 1 V/bit
b-2 Threshold voltage EV 100 ms V
process in order to protect vehicle battery H'108.5 A station (0 to 600 V)
Software version number of control protocol
1 / bit
Control protocol System
b-1 or charging sequences that the station deals H'109.0 EV 100 ms
number A station
(0 to 255)
with
Supply voltage value of the output circuit in H'109.1, System 1 V/bit
Output voltage EV 100 ms V -
the station H'109.2 A station (0 to 600 V)
Table A.2 (4 of 4)
Data
Item in CAN ID
Parameter Content Source Destination update Unit Status flag Resolution
Table 1 ID.byte(bit)
rate
Supply current value of the output circuit in System 1A/bit
Output current H'109.3 EV 100 ms A -
the station A station (0 to 255 A)
Remaining charging Remaining time before the end of charging System 10 s/bit
H'109.6 EV 100 ms s
time (counted by 10 s) (counted by 10 s) A station (0 to 2540 s)
Remaining charging
Remaining time before the end of charging System 1 min/bit
time H'109.7 EV 100 ms min
(counted by min) A station (0 to 255 min)
(counted by min)
c Status flag indicating the energy transfer System 0: standby,
Station status H'109.5(0) EV 100 ms -
h-1 from the station A station 1: charging
Status flag indicating whether or not there is System 0: normal,
Station malfunction H'109.5(1) EV 100 ms -
a malfunction caused by the station A station 1: fault
Status flag indicating the electromagnetic System 0: unlocked,
Vehicle connector lock H'109.5(2) EV 100 ms -
lock status of vehicle connector A station 1: locked
Status flag indicating the compatibility of
System 0:compatible,
Battery incompatibility vehicle battery with the output voltage of H'109.5(3) EV 100 ms -
A station 1: incompatible
station
Status flag indicating whether or not there is
Charging system System 0: normal,
d a problem with EV, such as improper H'109.5(4) EV 100 ms -
malfunction A station 1: malfunction
connection
0: operating,
Status flag indicating whether or not the System
e Charger stop control H'109.5(5) EV 100 ms - 1: shutdown or
station proceeds with shutdown process A station
stop charging
– 18 – IEC 61851-24:2014 © IEC 2014
A.5 Physical/data link layer
A.5.1 Specifications
The physical/data link layer specifications are shown in Table A.3.
Table A.3 – The physical/data link layer specifications for system A
ISO 11898-1 and ISO 11898-2
Communication protocol
The extension bit (12 − 29 bit) is not used.
Communication
system
Transmission rate (kbps) 500
Cycle 100 ms ± 10 %
A.5.2 Communication circuit
The CAN communication circuit is established to exchange parameters, i.e. voltage, current,
status flags, and fault flags, which are necessary for the charging control.
– Terminating resistor
1:1 communication is assumed. The vehicle and the d.c. EV charging station shall be
equipped with terminating resistors.
– Noise filter
The vehicle and the d.c. EV charging station shall be equipped with noise filters to reduce
the conducted noise of the common mode and differential mode.
– Twisted-pair line
Twisted pair line shall be utilized as the communication line that links the d.c. EV charging
station with the vehicle so as to reduce differential mode noise.
– CAN transceiver
CAN transceiver shall be equipped to send and receive CAN communication data.
The CAN-bus circuit shall be established independently for d.c. charging, as shown in
Figure A.2.
Charger side Vehicle side
TX
TX
CAN Noise Noise CAN
Terminating Terminating
IC IC
filter filter
resistor resistor
Twisted pair line
RX
RX
IEC 0680/14
Figure A.2 – CAN-bus circuit diagram
A.5.3 Transmission
Data frames shall be transmitted in ascending order of ID number specified in Table A.2. The
data frames shall be continuously transmitted at 100 ms (± 10 %) interval through the
charging process.
A.5.4 Reception
When the vehicle or the d.c. EV charging station receives data frames from the other party,
the received frames should not be echoed. Furthermore, the received error frames shall be
destroyed.
A.5.5 CAN communication
Figure A.3 shows the basic specifications related to the dedicated CAN communication
between the vehicle and the d.c. EV charging station.
Network within
Network within
the d.c. EV
the vehicle
charging station
DC.EV
Vehicle
charging
station
CAN-bus
IEC 0681/14
Figure A.3 – Dedicated CAN communication between
vehicle and d.c. EV charging station
– 20 – IEC 61851-24:2014 © IEC 2014
Annex B
(normative)
Digital communication for control of d.c. EV charging system B
NOTE This annex is not applicable to Europe
B.1 General
This annex shows the specification of d.c. charging control digital communication for the d.c
EV charging station of system B (in this annex, referred to as "System B station" or "charger")
as specified in Annex BB of IEC 61851-23:—.
B.2 Digital communication of d.c. charging control
The parameters for digital communication of d.c. charging control shall be exchanged
according to the sequence diagram as shown in Figure B.1.
Vehicle
Charger Signal/ digital
information
Physical connection Physical connection
Signal
and power on and power on
Digital
Charge handshake Charge handshake
Digital
Charge parameter Charge parameter
configuration configuration
Digital
Charging Charging
Digital
Charge ending Charge ending
Signal
Disconnection Disconnection
IEC 0682/14
Figure B.1 – Sequence diagram of d.c. charging control communication for system B
B.3 Digital communication actions during charging control process
The communication actions and parameters during d.c. charging control process are shown in
Table B.1.
Table B.1 – Communication actions and parameters during
d.c. charging control process between system B station and vehicle
Charging Digital
Parameter
control stage communication Information Source Destination
cycle
(process) action
Confirm the Charger recognition
Charger Vehicle 250 ms
necessary parameter
Handshaking parameters of
Vehicle recognition
battery and
Vehicle Charger 250 ms
parameter
charger.
Battery charge parameter Vehicle Charger 500 ms
Charger time
Charger Vehicle 500 ms
synchronization
Charging Exchange of
parameter charging control Charger max/min output
Charger Vehicle 250 ms
configuration parameters. parameter
Vehicle charge ready Vehicle Charger 250 ms
Charger output ready Charger Vehicle 250 ms
Battery charge
Vehicle Charger 50 ms
requirement
Send charging
Charger charge status Charger Vehicle 50 ms
status to each
Battery charge status 1 Vehicle Charger 250 ms
other, according
to the battery
Battery charge status 2 Vehicle Charger 250 ms
charge level
Charging stage requirements
Battery cell voltage Vehicle Charger 1 s
sent by Vehicle;
the charger
Battery temperature Vehicle Charger 1 s
adjusts the
Vehicle stopping Vehicle
charging
Charger 10 ms
command
process.
Charger stopping
Charger Vehicle 10 ms
command
Vehicle statistic data Vehicle Charger 250 ms
Charging ending Energy transfer
stage shut-off.
Charger statistic data Charger Vehicle 250 ms
Restart Vehicle receiving error Vehicle Charger 250 ms
communication
Communication
program or stop
error
Charger receiving error Charger Vehicle 250 ms
charging
process.
B.4 Parameter definition
The definition of parameters during d.c. charging control process are shown in Tables B.2,
B.3, B.4, B.5 and B.6.
– 22 – IEC 61851-24:2014 © IEC 2014
Table B.2 – Parameters in charge handshake stage for system B
Item in
a b
Information Parameter M /O Unit Resolution Status flag
Table 1
0x00:
unrecognized
Recognition result M - - -
0xAA:
Charger
recognized
recognition
parameter
Charger number M - - - -
Charger/charge station
O - - - -
location code
Vehicle communication
M - - - b-1
protocol version
Battery type code M - - - -
Battery system rated
M Ah 0,1 Ah/bit - -
capacity
Battery system rated voltage M V 0,1 V/bit - -
Battery manufacturer code,
O - - - -
Vehicle
ASCII
recognition
parameter
Battery pack number O - - - -
Battery pack product date O - - - -
Battery pack charging times O - 1/bit - -
0: Lease
Battery pack property right
O - - -
mark
1: Private
Vehicle identification number
O - - - -
(VIN)
a
M = Mandatory
b
O = Optional
NOTE The communication protocol version includes 3 bytes. The current version is V1.0, whic
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