Electric vehicle wireless power transfer (WPT) systems - Part 2: Specific requirements for communication between electric road vehicle (EV) and infrastructure

IEC TS 61980-2:2019 applies to communication between electric road vehicle (EV) and wireless power transfer (WPT) systems when connected to the supply network, at standard supply voltages per IEC 60038 up to 1000 V AC and up to 1500 V DC.
This document also applies to wireless power transfer equipment supplied from on-site storage systems (e.g. buffer batteries) at standard supply voltages per IEC 60038 up to 1000 V AC and up to 1500 V DC.
The aspects covered in this document include
– standards for operational characteristics and functional characteristics of the WPT communication subsystem,
– communication requirements for WPT system while driving, which are under consideration,
– communication requirements for two- and three-wheel vehicles, which are under consideration, and
– communication requirements for bidirectional power transfer are under consideration
This document does not apply to
– safety aspects related to maintenance, and
– trolley buses, rail vehicles and vehicles designed primarily for use off-road.

General Information

Status
Published
Publication Date
12-Jun-2019
Current Stage
PPUB - Publication issued
Completion Date
13-Jun-2019
Ref Project

Buy Standard

Technical specification
IEC TS 61980-2:2019 - Electric vehicle wireless power transfer (WPT) systems - Part 2: Specific requirements for communication between electric road vehicle (EV) and infrastructure
English language
84 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC TS 61980-2
Edition 1.0 2019-06
TECHNICAL
SPECIFICATION
colour
inside
Electric vehicle wireless power transfer (WPT) systems –
Part 2: Specific requirements for communication between electric road vehicle
(EV) and infrastructure
IEC TS 61980-2:2019-06(en)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2019 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org

The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,

variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English

committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.

and withdrawn publications. Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary

details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and

once a month by email. French extracted from the Terms and Definitions clause of

IEC publications issued since 2002. Some entries have been

IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and

If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC TS 61980-2
Edition 1.0 2019-06
TECHNICAL
SPECIFICATION
colour
inside
Electric vehicle wireless power transfer (WPT) systems –
Part 2: Specific requirements for communication between electric road vehicle
(EV) and infrastructure
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 43.120 ISBN 978-2-8322-6679-3

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC TS 61980-2:2019  IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 7

INTRODUCTION ..................................................................................................................... 9

1 Scope ............................................................................................................................ 10

2 Normative references .................................................................................................... 10

3 Terms and definitions .................................................................................................... 11

4 Abbreviated terms ......................................................................................................... 14

5 Communication of WPT systems ................................................................................... 14

5.1 General ................................................................................................................. 14

5.2 System architecture .............................................................................................. 14

5.3 General system requirements ............................................................................... 16

5.3.1 General ......................................................................................................... 16

5.3.2 Interoperability requirements ......................................................................... 16

5.3.3 System configuration ..................................................................................... 16

5.3.4 Communication security ................................................................................. 17

5.3.5 Timing ........................................................................................................... 17

6 Power transfer process with respect to communication .................................................. 17

6.1 General ................................................................................................................. 17

6.2 Overview of operation process activities ............................................................... 17

6.3 Activities ............................................................................................................... 18

6.3.1 Communication setup and service selection ................................................... 18

6.3.2 Reject WPT session ...................................................................................... 18

6.3.3 Fine positioning ............................................................................................. 18

6.3.4 Pairing ........................................................................................................... 19

6.3.5 Final compatibility check ................................................................................ 19

6.3.6 Initial alignment check ................................................................................... 20

6.3.7 Prepare power transfer .................................................................................. 20

6.3.8 Time scheduled power transfer (informative) ................................................. 21

6.3.9 Perform power transfer .................................................................................. 22

6.3.10 Stop power transfer ....................................................................................... 23

6.3.11 WPT session ................................................................................................. 24

6.3.12 EV leaves WPT spot ...................................................................................... 24

6.3.13 Safety monitoring and diagnostics ................................................................. 24

6.3.14 Terminate communication .............................................................................. 25

6.3.15 Terminate safety monitoring and diagnostics ................................................. 25

6.3.16 Wake-up after power outage .......................................................................... 25

7 Control process states ................................................................................................... 26

7.1 Supply device state definitions .............................................................................. 26

7.1.1 Supply device state diagram .......................................................................... 26

7.1.2 Stand by (WPT_S_SB) .................................................................................. 27

7.1.3 Service initiated (WPT_S_SI) ......................................................................... 27

7.1.4 WPT session rejected .................................................................................... 28

7.1.5 Awaiting alignment (WPT_S_AA) ................................................................... 29

7.1.6 Idle (WPT_S_IDLE) ....................................................................................... 31

7.1.7 Power transfer (WPT_S_PT) .......................................................................... 32

7.1.8 Service terminated occupied (WPT_S_STO) .................................................. 33

7.1.9 Out of service (WPT_S_OOS) ........................................................................ 34

---------------------- Page: 4 ----------------------
IEC TS 61980-2:2019  IEC 2019 – 3 –

7.1.10 Sleep mode WPT_S_SLP .............................................................................. 34

7.2 Supply device state transitions .............................................................................. 35

7.3 EV device state definitions .................................................................................... 36

7.3.1 EV device state diagram ................................................................................ 36

7.3.2 Stand by (WPT_V_SB) .................................................................................. 37

7.3.3 Service initiated (WPT_V_SI) ......................................................................... 38

7.3.4 Awaiting alignment (WPT_V_AA) ................................................................... 39

7.3.5 Idle (WPT_V_IDLE) ....................................................................................... 40

7.3.6 Power transfer active (WPT_V_PT) ............................................................... 40

7.3.7 Off (WPT_V_OFF) ......................................................................................... 40

7.4 EV state transitions ............................................................................................... 40

7.5 Exception handling................................................................................................ 41

7.5.1 General ......................................................................................................... 41

7.5.2 Supply device exception handling (WPT_S_ERR) .......................................... 41

7.5.3 EV device exception handling (WPT_V_ERR) ................................................ 41

7.5.4 Exception descriptions ................................................................................... 42

8 Communication parameter for WPT systems ................................................................. 42

8.1 General ................................................................................................................. 42

8.2 General parameters .............................................................................................. 42

8.3 Communication setup ........................................................................................... 42

8.4 Service selection .................................................................................................. 43

8.5 Fine positioning .................................................................................................... 45

8.5.1 General ......................................................................................................... 45

8.5.2 Starting fine positioning ................................................................................. 45

8.5.3 Fine positioning data exchange ..................................................................... 45

8.5.4 Terminating fine positioning ........................................................................... 46

8.6 Pairing .................................................................................................................. 46

8.6.1 General ......................................................................................................... 46

8.6.2 Start pairing ................................................................................................... 46

8.7 Initial alignment check .......................................................................................... 47

8.7.1 General ......................................................................................................... 47

8.7.2 Initial alignment check request/response ....................................................... 47

8.8 Prepare power transfer ......................................................................................... 48

8.8.1 General ......................................................................................................... 48

8.8.2 Final compatibility check ................................................................................ 48

8.9 Perform power transfer ......................................................................................... 49

8.10 Stop power transfer .............................................................................................. 50

8.11 Terminate communication ..................................................................................... 50

8.12 Exception handling................................................................................................ 50

9 Message sequences of communication with WLAN ........................................................ 51

9.1 General ................................................................................................................. 51

9.2 Messages of communication for power transfer ..................................................... 51

9.3 Communication setup ........................................................................................... 51

9.4 Service selection .................................................................................................. 51

9.5 Fine positioning .................................................................................................... 52

9.6 Pairing .................................................................................................................. 52

9.7 Final compatibility check ....................................................................................... 52

9.8 Initial alignment check .......................................................................................... 52

9.9 Prepare power transfer ......................................................................................... 53

---------------------- Page: 5 ----------------------
– 4 – IEC TS 61980-2:2019  IEC 2019

9.10 Perform power transfer ......................................................................................... 53

9.11 Stop power transfer .............................................................................................. 54

9.12 Terminate communication ..................................................................................... 54

Annex A (informative) Use cases ........................................................................................ 55

A.1 General ................................................................................................................. 55

A.2 Use case descriptions ........................................................................................... 57

A.2.1 UC select supply device ................................................................................ 57

A.2.2 UC service selection ...................................................................................... 59

A.2.3 UC fine positioning ........................................................................................ 60

A.2.4 UC prepare power transfer ............................................................................ 62

A.2.5 UC safety monitoring and diagnostics ............................................................ 64

A.2.6 UC perform power transfer ............................................................................ 64

A.2.7 UC stop power transfer .................................................................................. 65

A.2.8 UC sleep mode (optional) .............................................................................. 67

Annex B (informative) Physical definition of links and signals............................................... 69

B.1 General ................................................................................................................. 69

B.2 System architecture .............................................................................................. 69

B.3 WLAN ................................................................................................................... 69

B.4 SR signal .............................................................................................................. 69

B.5 LF signal (EV device to supply device) .................................................................. 70

B.6 Magnetic vector (EV device to supply device) ....................................................... 72

B.7 LPE (supply device to EV device) ......................................................................... 72

Annex C (informative) Usage of supplemental signals .......................................................... 73

C.1 General ................................................................................................................. 73

C.2 Fine positioning .................................................................................................... 73

C.2.1 General ......................................................................................................... 73

C.2.2 Manual .......................................................................................................... 73

C.2.3 Low power excitation (LPE) ........................................................................... 73

C.2.4 LF signal ....................................................................................................... 74

C.2.5 Magnetic vector ............................................................................................. 77

C.3 Pairing .................................................................................................................. 77

C.3.1 General ......................................................................................................... 77

C.3.2 Coding pattern specification........................................................................... 77

C.3.3 Low power excitation (LPE) ........................................................................... 78

C.3.4 SR signal ....................................................................................................... 79

C.3.5 LF signal ....................................................................................................... 79

C.3.6 Magnetic vector ............................................................................................. 79

C.4 Initial alignment check .......................................................................................... 80

C.4.1 General ......................................................................................................... 80

C.4.2 LPE target current check ............................................................................... 80

C.4.3 RSSI method ................................................................................................. 81

C.5 Continuous alignment check ................................................................................. 82

C.5.1 General ......................................................................................................... 82

C.5.2 System anomaly check .................................................................................. 82

C.5.3 SR signal ....................................................................................................... 83

C.6 Emergency shutdown ............................................................................................ 83

C.6.1 General ......................................................................................................... 83

C.6.2 RF signal ....................................................................................................... 83

C.6.3 Power termination .......................................................................................... 83

---------------------- Page: 6 ----------------------
IEC TS 61980-2:2019  IEC 2019 – 5 –

Bibliography .......................................................................................................................... 84

Figure 1 – Possible elements of combination in a communication subsystem ........................ 15

Figure 2 – WPT site with a single supply device .................................................................... 16

Figure 3 – Operation process of activities for the WPT .......................................................... 17

Figure 4 – Supply device state diagram ................................................................................ 26

Figure 5 – Activity communication setup ............................................................................... 27

Figure 6 – Activity service selection ...................................................................................... 28

Figure 7 – Activity reject WPT session .................................................................................. 29

Figure 8 – Activity from fine positioning to initial alignment check ......................................... 30

Figure 9 – Activity prepare power transfer ............................................................................. 31

Figure 10 – Activity terminate WPT session .......................................................................... 32

Figure 11 – Activity Sleep ..................................................................................................... 32

Figure 12 – Activity stop power transfer ................................................................................ 33

Figure 13 – Activity EV leave WPT spot ................................................................................ 34

Figure 14 – Activity wake-up ................................................................................................. 35

Figure 15 – EV device state diagram .................................................................................... 37

Figure 16 – Activity communication setup (EV device state) .................................................. 38

Figure 17 – Activity service selection (EV device state) ......................................................... 38

Figure 18 – Activity from fine positioning to initial alignment check (EV device state) ............ 39

Figure 19 – Activity prepare power transfer (EV device state) ............................................... 40

Figure A.1 – Use cases particularly for wireless power transfer ............................................. 55

Figure A.2 – Use cases from ISO 15118-1 reusable for WPT systems................................... 56

Figure A.3 – Activity diagram for UC select supply device ..................................................... 58

Figure A.4 – Activity diagram for UC fine positioning ............................................................. 61

Figure A.5 – Activity diagram for UC prepare power transfer ................................................. 63

Figure A.6 – Activity diagram for UC perform power transfer ................................................. 65

Figure A.7 – Activity diagram for UC stop power transfer ...................................................... 66

Figure A.8 – Activity diagram for UC sleep mode .................................................................. 68

Figure B.1 – Example arrangement of the auxiliary LF antennas for the primary device

(left) and the vehicle (right) ................................................................................................... 71

Figure B.2 – Example arrangement of the auxiliary LF antennas for the primary device

(left) and the EV (right) ......................................................................................................... 72

Figure C.1 – Explanation of parameters for LF fine positioning ............................................. 76

Figure C.2 – Coding pattern timing and examples ................................................................. 78

Figure C.3 – Symmetrical antenna configuration for signal comparison with zero offset ........ 81

Figure C.4 – Symmetrical antenna configuration for signal comparison with given offset ....... 82

Table 1 – Supply device state transitions .............................................................................. 35

Table 2 – EV device state transitions .................................................................................... 41

Table 3 – Exception handling ................................................................................................ 42

Table 4 – Service selection EVCC request parameters ......................................................... 43

Table 5 – Service selection SECC response parameters ....................................................... 43

Table 6 – Method list for fine positioning ............................................................................... 44

---------------------- Page: 7 ----------------------
– 6 – IEC TS 61980-2:2019  IEC 2019

Table 7 – Method list for pairing ............................................................................................ 45

Table 8 – Method list for initial alignment .............................................................................. 45

Table 9 – Fine positioning response ...................................................................................... 45

Table 10 – Pairing start request ............................................................................................ 46

Table 11 – Pairing start response ......................................................................................... 46

Table 12 – Pairing confirmation request ................................................................................ 47

Table 13 – Pairing confirmation response ............................................................................. 47

Table 14 – Initial alignment check request ............................................................................ 47

Table 15 – Initial alignment check response .......................................................................... 47

Table 16 – Final compatibility check request parameters ...................................................... 48

Table 17 – Final compatibility check response parameters .................................................... 48

Table 18 – Perform power transfer request parameters ......................................................... 49

Table 19 – Perform power transfer response parameters ...................................................... 49

Table 20 – Error request parameters .................................................................................... 50

Table 21 – Error respond parameters .................................................................................... 50

Table A.1 – UC select supply device ..................................................................................... 57

Table A.2 – UC service selection .......................................................................................... 59

Table A.3 – UC fine positioning ............................................................................................. 60

Table A.4 – UC prepare power transfer ................................................................................. 62

Table A.5 – UC safety monitoring and diagnostics ................................................................ 64

Table A.6 – UC perform power transfer ................................................................................. 64

Table A.7 – UC stop power transfer ...................................................................................... 65

Table A.8 – UC sleep mode .................................................................................................. 67

Table C.1 – Data of the antenna arrangement at EV to send to SECC .................................. 74

Table C.2 – Data of the antenna arrangement at primary device to send to EVCC ................ 75

Table C.3 – Data exchanged between EVCC and SECC during fine positioning .................... 76

---------------------- Page: 8 ----------------------
IEC TS 61980-2:2019  IEC 2019 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLE WIRELESS POWER TRANSFER (WPT) SYSTEMS –
Part 2: Specific requirements for communication between electric road
vehicle (EV) and infrastructure
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 Specifi

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.