IEC 61980-2:2023

Electric vehicle wireless power transfer (WPT) systems - Part 2: Specific requirements for MF-WPT system communication and activities

IEC 61980-2:2023 addresses communication and activities of magnetic field wireless power transfer (MF-WPT) systems.
The requirements in this document are intended to be applied for MF-WPT systems according to IEC 61980-3 and ISO 19363.
The aspects covered in this document include operational and functional characteristics of the MF-WPT communication system and related activities, and operational and functional characteristics of the positioning system.
The following aspects are under consideration for future documents:
- requirements for two- and three-wheel vehicles;
- requirements for MF-WPT systems supplying power to EVs in motion;
- requirements for bidirectional power transfer.
NOTE Any internal communication at supply device or EV device is not in the scope of this document

Systèmes de transfert de puissance sans fil (WPT) pour véhicules électriques - Partie 2: Exigences spécifiques pour la communication et les activités des systèmes MF-WPT

IEC 61980-2:2023 traite de la communication et des activités des systèmes de transfert d’énergie sans fil en champ magnétique (MF-WPT).
Les exigences du présent document sont destinées à être appliquées aux systèmes MF-WPT conformément aux normes CEI 61980-3 et ISO 19363.
Les aspects traités dans le présent document comprennent les caractéristiques opérationnelles et fonctionnelles du système de communication MF-WPT et des activités connexes, ainsi que les caractéristiques opérationnelles et fonctionnelles du système de positionnement.
Les aspects ci-après sont à l’étude pour les futurs documents:
- prescriptions applicables aux véhicules à deux et trois roues; les
- exigences relatives aux systèmes MF-WPT alimentant les véhicules électriques en mouvement;
- exigences pour le transfert de puissance bidirectionnel.
NOTE Toute communication interne au niveau du dispositif d’alimentation ou du dispositif EV n’entre pas dans le domaine d’application du présent document

General Information

• Status: Published
• Publication Date: 02-May-2023
• ICS: 43.120 - Electric road vehicles
• Technical Committee: TC 69 - Electrical power/energy transfer systems for electrically propelled road vehicles and industrial trucks
• Drafting Committee: WG 7 - TC 69/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 26-May-2023
• Completion Date: 03-May-2023

Relations

• Revises: 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
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61980-2
®

Edition 1.0 2023-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Electric vehicle wireless power transfer (WPT) systems –
Part 2: Specific requirements for MF-WPT system communication and activities

Systèmes de transfert de puissance sans fil (WPT) pour véhicules électriques –
Partie 2: Exigences spécifiques pour la communication et les activités des
systèmes MF-WPT

IEC 61980-2:2023-05(en-fr)

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IEC 61980-2

®


Edition 1.0 2023-05




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside










Electric vehicle wireless power transfer (WPT) systems –

Part 2: Specific requirements for MF-WPT system communication and activities



Systèmes de transfert de puissance sans fil (WPT) pour véhicules électriques –

Partie 2: Exigences spécifiques pour la communication et les activités des

systèmes MF-WPT















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 43.120 ISBN 978-2-8322-6858-2




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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 Abbreviated terms . 14
5 General system structure and interoperability concept . 14
5.1 System structure . 14
5.2 Interoperability concept . 15
6 General communication requirements . 15
7 Communication procedure during an MF-WPT session . 16
7.1 General . 16
7.2 Activities . 18
7.2.1 Communication setup . 18
7.2.2 Fine positioning . 18
7.2.3 Pairing . 23
7.2.4 Authorization and service selection . 29
7.2.5 Final compatibility check . 30
7.2.6 Alignment check . 31
7.2.7 Prepare power transfer . 33
7.2.8 Perform power transfer . 34
7.2.9 Stop power transfer . 38
7.2.10 Terminate communication . 39
7.2.11 WPT spot vacancy detection . 39
7.2.12 Time scheduled power transfer . 40
7.2.13 Safety monitoring and diagnostics . 41
7.2.14 Wake-up after power outage . 43
7.3 Exception handling. 43
7.3.1 General . 43
7.3.2 Exception descriptions . 44
7.3.3 Supply device exception handling (WPT_S_ERR) . 45
7.3.4 EV device exception handling (WPT_V_ERR) . 46
Annex A (informative)  Use cases . 47
A.1 General . 47
A.2 Use case descriptions . 48
A.2.1 UC select supply device . 48
A.2.2 UC compatibility check . 48
A.2.3 UC fine positioning . 49
A.2.4 UC prepare power transfer . 50
A.2.5 UC safety monitoring and diagnostics . 51
A.2.6 UC perform power transfer . 52
A.2.7 UC stop power transfer . 52
A.2.8 UC sleep mode (optional) . 53
Annex B (informative) Physical definition of links and signals. 55
B.1 General . 55
B.2 System architecture . 55

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B.3 WLAN . 55
B.4 LF signal . 55
B.5 LPE . 57
B.6 Power check . 58
B.7 External confirmation means . 58
Annex C (informative) Methods of P2PS signaling . 59
C.1 General . 59
C.2 Fine positioning . 59
C.2.1 General . 59
C.2.2 Manual . 59
C.2.3 LF positioning emitted by EV . 59
C.2.4 LF positioning emitted by supply device . 62
C.2.5 LF parameter exchange . 63
C.2.6 Low power excitation (LPE) . 66
C.3 Pairing . 67
C.3.1 General . 67
C.3.2 Coding pattern specification. 67
C.3.3 Low power excitation (LPE) . 68
C.3.4 LF signal . 68
C.3.5 External confirmation . 69
C.4 Alignment check . 70
C.4.1 General . 70
C.4.2 Power check . 70
C.4.3 LPE . 71
Annex D (normative) State diagrams of WPT process . 72
D.1 General . 72
D.2 Supply device state definitions . 72
D.2.1 Supply device state diagram . 72
D.2.2 System On (WPT_S_ON) . 72
D.2.3 Session initiated (WPT_S_SI) . 73
D.2.4 Awaiting alignment (WPT_S_AA) . 73
D.2.5 Idle (WPT_S_IDLE) . 73
D.2.6 Power transfer active (WPT_S_PTA) . 73
D.2.7 Power transfer (WPT_S_PT) . 73
D.2.8 Service terminated occupied (WPT_S_STO) . 73
D.2.9 System Off (WPT_S_OFF) . 74
D.2.10 Sleep (WPT_S_SLP) . 74
D.2.11 StandBy (WPT_S_STBY) . 74
D.3 Supply device state transitions . 74
D.3.1 General . 74
D.3.2 TS_03 and TS_10 . 76
D.3.3 TS_04 and TS_05 . 76
D.3.4 TS_06 . 77
D.3.5 TS_07. TS_09 and TS_12 . 77
D.3.6 TS_08, TS_14 and TS_16 . 78
D.3.7 TS_13 . 79
D.3.8 TS_11 . 80
D.3.9 TS_15 . 80
D.3.10 TS_17 . 81

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D.4 EV device state definitions . 82
D.4.1 EV device state diagram . 82
D.4.2 System On (WPT_V_ON) . 82
D.4.3 Session initiated (WPT_V_SI) . 82
D.4.4 Awaiting alignment (WPT_V_AA) . 83
D.4.5 Idle (WPT_V_IDLE) . 83
D.4.6 Power transfer active (WPT_V_PTA) . 83
D.4.7 Power transfer (WPT_V_PT) . 83
D.4.8 Sleep (WPT_V_SLP) . 83
D.4.9 Standby (WPT_V_STBY) . 83
D.4.10 System Off (WPT_V_OFF) . 83
D.5 EV state transitions . 83
D.5.1 General . 83
D.5.2 TV_03 . 84
D.5.3 TV_05 . 85
D.5.4 TV_06 . 85
D.5.5 TV_07 and TV_15 . 86
D.5.6 TV_08, TV_14 and TV_16 . 87
D.5.7 TV_04 and TV_09 . 88
D.5.8 TV_10 . 89
D.5.9 TV_11 . 89
D.5.10 TV_17 . 90
Annex E (informative) Marking of primary device . 91
E.1 General . 91
E.2 Requirements for detectability . 92
E.3 Usage for positioning – Parameter setting and message exchange . 92
E.4 Usage for pairing . 93
E.4.1 General . 93
E.4.2 Parameter setting and message exchange . 93
Bibliography . 94

Figure 1 – Example of system structure . 15
Figure 2 – Chain of activities . 17
Figure 3 – Natural offset with different coil geometries . 20
Figure 4 – Sequence of parameter exchange for pairing using LPE . 25
Figure 5 – Sequence of parameter exchange for pairing using LF signal emitted by the
EV/EV device . 26
Figure 6 – Sequence of parameter exchange for pairing using LF signal emitted by the
primary device . 27
Figure 7 – Sequence of parameter exchange for pairing using active optical means
(e.g., LED) . 28
Figure 8 – Sequence of parameter exchange for pairing using passive optical means
(e.g., marker at primary device) . 29
Figure 9 – Sequence of parameter exchange for pairing using external confirmation . 29
Figure 10 – MF-WPT control system . 35
Figure 11 – Classification of system events . 43
Figure A.1 – Use cases specific to wireless power transfer . 47

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Figure B.1 – Example arrangement of the auxiliary LF receivers/transmitters for the
primary device and the vehicle . 56
Figure B.2 – Example arrangement of the auxiliary LF transmitters/receivers for the

primary device and the EV . 57
Figure C.1 – Example OOK data modulation . 60
Figure C.2 – Generalized Manchester encoding . 60
Figure C.3 – Example LF signal data format for fine positioning . 61
Figure C.4 – Example Explanation of parameters for LF fine positioning . 65
Figure C.5 – Coding pattern timing and examples . 67
Figure C.6 – Example LF signal data format for pairing . 68
Figure D.1 – Supply device state diagram . 72
Figure D.2 – Transition TS_03 and TS_10 . 76
Figure D.3 – Transition TS_04 and TS_05 . 76
Figure D.4 – Transition TS_06 . 77
Figure D.5 – Transition TS_07, TS_09, TS_12 . 78
Figure D.6 – Transition TS_08, TS_14, TS_16 . 79
Figure D.7 – Transition TS_13 . 79
Figure D.8 – Transition TS_11 . 80
Figure D.9 – Transition TS_15 . 81
Figure D.10 – Transition TS_17 . 82
Figure D.11 – EV device state diagram . 82
Figure D.12 – Transition TV_03 . 85
Figure D.13 – Transition TV_05 . 85
Figure D.14 – Transition TV_06 . 86
Figure D.15 – Transition TV_07, TV_15 . 87
Figure D.16 – Transition TV_08, TV_14, TV_16 . 88
Figure D.17 – Transition TV_04 and TV_09 . 88
Figure D.18 – Transition TV_10 . 89
Figure D.19 – Transition TV_11 . 90
Figure D.20 – Transition TV_17 . 90
Figure E.1 – Example for a marking for a primary device . 92

Table 1 – Fine positioning setup data from EV . 21
Table 2 – Fine positioning setup data from SECC . 22
Table 3 – Data transfer during positioning . 23
Table 4 – Pairing parameters provided by the EVCC to the SECC . 24
Table 5 – Pairing parameters provided by the SECC to the EVCC . 24
Table 6 – Final compatibility parameters from EV . 31
Table 7 – Final compatibility check parameters from SECC . 31
Table 8 – Alignment check parameter sent by the EVCC. 33
Table 9 – Alignment check response parameters sent by the SECC . 33
Table 10 – Symbols for MF-WPT control system . 35
Table 11 – MF-WPT controller inputs and outputs . 36
Table 12 – Relative response time for control loops . 36

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Table 13 – Perform power transfer request parameters . 37
Table 14 – Perform power transfer response parameters . 38
Table 15 – Exception handling . 44
Table 16 – Error respond parameters . 46
Table 17 – Error request parameters . 46
Table A.1 – UC select supply device . 48
Table A.2 – UC compatibility check . 49
Table A.3 – UC fine positioning . 50
Table A.4 – UC prepare power transfer . 51
Table A.5 – UC safety monitoring and diagnostics . 52
Table A.6 – UC perform power transfer . 52
Table A.7 – UC stop power transfer .
...