ISO/PAS 19363:2017

Electrically propelled road vehicles - Magnetic field wireless power transfer - Safety and interoperability requirements

ISO/PAS 19363:2017 defines the requirements and operation of the on-board vehicle equipment that enables magnetic field wireless power transfer (MF-WPT) for traction battery charging of electric vehicles. It is intended to be used for passenger cars and light duty vehicles. ISO/PAS 19363:2017 addresses the following aspects for an EV device: - transferred power; - ground clearance; - interoperability requirements among differently classified EV devices and associated off-vehicle systems; - performance requirements under various conditions, including among different manufacturers and classifications; - safety requirements; - test procedures. EV devices according to ISO/PAS 19363:2017 are intended to operate with off-board systems currently under development in the IEC 61980 series. NOTE 1 This edition covers stationary applications. NOTE 2 Bidirectional power transfer is not considered in this edition.

Véhicules routiers électriques — Transmission d’énergie sans fil par champ magnétique — Exigences de sécurité et d'interopérabilité

General Information

• Status: Withdrawn
• Publication Date: 16-Jan-2017
• Withdrawal Date: 16-Jan-2017
• ICS: 43.120 - Electric road vehicles
• Technical Committee: ISO/TC 22/SC 37 - Electrically propelled vehicles
• Drafting Committee: ISO/TC 22/SC 37 - Electrically propelled vehicles
• Current Stage: 9599 - Withdrawal of International Standard
• Start Date: 03-Apr-2020
• Completion Date: 13-Dec-2025

Relations

• Consolidated By: ISO 20705:2019 - Textiles - Quantitative microscopical analysis - General principles of testing
• Effective Date: 06-Jun-2022
• Revised: ISO 19363:2020 - Electrically propelled road vehicles - Magnetic field wireless power transfer - Safety and interoperability requirements
• Effective Date: 08-Apr-2017

Standards Content (Sample)

PUBLICLY ISO/PAS
AVAILABLE 19363
SPECIFICATION
First edition
2017-01
Electrically propelled road vehicles —
Magnetic field wireless power
transfer — Safety and interoperability
requirements
Véhicules routiers électriques — Transmission d’énergie sans fil par
champ magnétique — Exigences de sécurité et d’interopérabilité
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2017 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Environmental conditions . 6
5 System description . 6
6 MF-WPT interoperability . 7
6.1 General . 7
6.2 Classification of EV power circuits . 7
6.2.1 General. 7
6.2.2 MF-WPT classes . 7
6.2.3 Z classes . 7
6.3 Performance requirements . 8
6.3.1 General. 8
6.3.2 Alignment tolerance requirements . 8
6.3.3 Power transfer requirements . 8
6.3.4 System efficiency requirements. 9
6.4 Frequency . 9
6.5 Reference EV devices . 9
6.6 Test procedure . 9
7 Functions .11
7.1 Communication setup .11
7.2 Service selection .11
7.2.1 General.11
7.2.2 Parameters to be exchanged for interoperability .12
7.3 Fine positioning.12
7.4 Pairing .12
7.5 Final compatibility check .12
7.6 Initial alignment check .12
7.7 Start power transfer .13
7.8 Power saver mode .13
7.8.1 Start power saver mode .13
7.8.2 Terminate power saver mode .13
7.9 Perform power transfer .13
7.10 Stop power transfer .13
7.11 User initiated stop power transfer .14
7.12 Safety monitoring and diagnostics .14
7.12.1 General.14
7.12.2 Alignment monitoring .14
7.12.3 Power transfer monitoring .14
7.12.4 Communication link monitoring .14
7.13 Terminate communication . .14
7.14 Terminate safety monitoring and diagnostics .14
7.15 Wake up after power outage .14
7.16 Test procedure .14
8 Sequence and communication .14
8.1 General .14
8.2 Sequence of functions .15
8.2.1 Protocol flow stages and associated messages .15
8.2.2 Basic definitions for error handling .15
8.3 Communication .15
9 EMC requirements .15
10 Safety requirements .15
10.1 Protection in case of unintended power transfer .15
10.2 Protection against electrical shock .16
10.3 Protection against overcurrent .16
10.3.1 Overload protection .16
10.3.2 Short-circuit protection .16
10.4 Protection of humans against electromagnetic effects .16
10.4.1 General.16
10.4.2 Protection areas .16
10.4.3 Requirements for protection against exposure to hazardous
electromagnetic fields .17
10.4.4 Requirements to protect functionality of active implantable medical
devices (AIMDs) .18
10.4.5 Test procedures.18
10.5 Temperature rise and protection against thermal incidents .20
10.5.1 General.20
10.5.2 Protection against burns from heating of foreign objects .20
11 Owner’s manual and marking .20
11.1 Owner’s manual .20
11.2 Marking .20
Annex A (informative) Circular reference EV device proposals for MF-WPT1.21
Annex B (informative) DD reference EV device proposals for MF-WPT1 .26
Annex C (informative) Circular reference EV device proposals for MF-WPT2 .33
Annex D (informative) DD reference EV device proposals for MF-WPT2 .40
Annex E (informative) Corresponding reference supply devices proposals .50
Annex F (informative) Coil position in parking spot .58
Bibliography .59
iv © ISO 2017 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www . i so .org/ iso/ foreword .html.
ISO PAS 19363:2017 was prepared by Technical Committee ISO/TC 22, Road vehicles, SC 37, Electrically
propelled vehicles, in collaboration with IEC/TC 69 Electric road vehicles and electric industrial trucks, in
accordance with ISO/IEC mode of cooperation 4.
Introduction
This document is an intermediate specification, published prior to the development of a full International
Standard. This document prescribes the usage of the wireless power transfer technology to charge
electrically propelled road vehicles. Even if the technology itself is well known, the implementation in
a vehicle is new and demands to meet the very specific requirements of the automotive industry. The
main purpose of this document is to respond to the upcoming market needs starting with determination
of basic safety requirements and documentation for the first findings for vehicle usage.
This document will be transformed into an International Standard as soon as consolidated technical
experiences are available. When transferring this document into an IS, technical changes are possible
to adopt the document to the latest level of knowledge.
vi © ISO 2017 – All rights reserved

PUBLICLY AVAILABLE SPECIFICATION ISO/PAS 19363:2017(E)
Electrically propelled road vehicles — Magnetic field
wireless power transfer — Safety and interoperability
requirements
1 Scope
This document defines the requirements and operation of the on-board vehicle equipment that enables
magnetic field wireless power transfer (MF-WPT) for traction battery charging of electric vehicles. It is
intended to be used for passenger cars and light duty vehicles.
This document addresses the following aspects for an EV device:
— transferred power;
— ground clearance;
— interoperability requirements among differently classified EV devices and associated off-vehicle
systems;
— performance requirements under various conditions, including among different manufacturers and
classifications;
— safety requirements;
— test procedures.
EV devices according to this document are intended to operate with off-board systems currently under
development in the IEC 61980 series.
NOTE 1 This edition covers stationary applications.
NOTE 2 Bidirectional power transfer is not considered in this edition.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 6469-3, Electrically propelled road vehicles — Safety specifications — Part 3: Protection of persons
against electric shock
ISO 14117, Active implantable medical devices — Electromagnetic compatibility — EMC test
protocols for implantable cardiac pacemakers, implantable cardioverter defibrillators and cardiac
resynchronization devices
ISO 15118-8, Road vehicles — Vehicle to grid communication interface — Part 8: Physical layer and data
link layer requirements for wireless communication
ISO 16750-3, Road vehicles — Environmental conditions and testing for electrical and electronic
equipment — Part 3: Mechanical loads
ISO 16750-4, Road vehicles — Environmental conditions and testing for electrical and electronic
equipment — Part 4: Climatic loads
ISO 16750-5, Road vehicles — Environmental conditions and testing for electrical and electronic
equipment — Part 5: Chemical loads
IEC 61786-1, Measurement of DC magnetic, AC magnetic and AC electric fields from 1 Hz to 100 kHz with
regard to exposure of human beings - Part 1: Requirements for measuring instruments
ICNIRP 2010, Guidelines for limiting exposure to time varying electric and magnetic fields (1 HZ – 100 kHZ)
ICNIRP 1998, Guidelines for limiting exposure to time varying electric and magnetic fields (up to 300 kHZ)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
alignment
relative position of primary to secondary device (3.27)
3.2
alignment check
confirmation that the primary and secondary devices (3.27) are properly positioned relative to each other
Note 1 to entry: Proper positioning is done to assure sufficient system functionality [e.g. system efficiency (3.35),
EMF/EMC limits, safety requirements, etc.].
3.3
basic insulation
insulation of hazardous-live-parts which provides basic protection
3.4
battery system
(battery) energy storage device that includes cells or cell assemblies or battery pack(s), as well as
electrical circuits and electronics
EXAMPLE BCU, contactors.
3.5
double insulation
insulation comprising both basic insulation (3.3) and supplementary insulation (3.30)
3.6
electric shock
physiological effect resulting from an electric current through a human body
3.7
electric vehicle/electric road vehicle
EV
any vehicle propelled by an electric motor drawing current from a battery system (3.4) intended
primarily for use on public roads
2 © ISO 2017 – All rights reserved

3.8
EV communication controller
EVCC
embedded system, within the vehicle, that implements the communication between the vehicle and the
SECC in order to support specific functions
Note 1 to entry: Such specific functions could be, for example, controlling input and output channels, encryption,
or data transfer between vehicle and SECC.
3.9
EV device
on-board component assembly, comprising the secondary device (3.27), the EV power electronics
(3.12) and the EV communication controller (3.8), as well as the mechanical connections between the
components necessary for wireless power transfer
3.10
EV power circuit
EVPC
electrical component assembly that includes the secondary device (3.27) and EV power electronics (3.12),
as well as the mechanical connections between the components
Note 1 to entry: EVPC is here defined specifically for MF-WPT systems (3.19).
3.11
EVPC power class
power class of an EVPC defined according to the MF-WPT input power class (3.18) of the supply device it
is designed to operate
Note 1 to entry: The power delivered to the EV device (3.9) will be less than that maximum MF-WPT input power
to the MF-WPT system (3.19) due to losses, for example, in the supply power electronics (3.34) and eddy currents
in the MF-WPT shield or the vehicle underbody.
3.12
EV power electronics
on-board electronics, including all housings and covers, that convert the AC power from the secondary
device (3.27) to DC power having suitable voltages and currents provided to the battery system (3.4) or
the traction-battery
EXAMPLE Impedance matching network (IMN), filter, rectifier, impedance converter.
3.13
fine positioning
relative movement of the secondary device (3.27) in relation to the primary device (3.23) with the goal of
reaching optimal alignment (3.20)
3.14
foreign object
object that is not an attached part of the vehicle or the MF-WPT system (3.19)
3.15
grid
electric power source that is not part of the vehicle for supplying electric energy to an EV using a supply
power circuit (3.33)
3.16
Magnetic Field Wireless Power Transfer
MF-WPT
wireless transfer of energy from a power source to an electrical load via a magnetic field
3.17
message
data in a specified format
EXAMPLE A message contains data in a specified format that describes for example, a request or a reply.
Note 1 to entry: A message contains zero or more parameters.
3.18
MF-WPT input power class
power class of a supply device of MF-WPT systems (3.19) defined from the perspective of the maximum
power drawn from the grid (3.15) in order to drive the supply device
Note 1 to entry: IEC 61980-3 will specify the MF-WPT input power classes, current status of discussions: for MF-
WPT1 the maximum input power is ≤3,7 kW, for MF-WPT2 the maximum input power is >3,7 kW and ≤7,7 kW, for
MF-WPT3 the maximum input power is >7,7 kW and ≤11 kW, for MF-WPT4 the maximum input power is >11 kW
and ≤22 kW, for MF-WPT5 the maximum input power is >22 kW. For this document, MF-WPT1 to MF-WPT4 are
under consideration.
3.19
MF-WPT system
system consisting of primary device (3.23), supply power electronics (3.34), supply equipment
communication controller (3.32), (the supply device), secondary device (3.27), EV power electronics (3.12)
and electric vehicle communication controller [the EV device (3.9)], including wiring, housing and covers
used to transfer energy using magnetic fields
Note 1 to entry: See also Figure 1.
3.20
optimal alignment
alignment (3.1) with the most efficient power transfer
3.21
pairing
process by which an EV is correlated with the unique dedicated primary device (3.23) at which it is
located and from which power will be transferred
3.22
power saver mode
mode in which the EV either turns EV device (3.9) components off or into a mode with reduced power
consumption
3.23
primary device
device external to the EV that is the source of the MF-WPT, including all housings and covers
Note 1 to entry: When the EV is receiving power, the primary device acts as the source of the power to be
transferred.
3.24
protection area
volume in and around the vehicle that has homogeneous protection target requirements
3.25
reference level
levels of field strength or power density derived from the basic restrictions using worst case
assumptions about exposure
Note 1 to entry: If the reference levels are met, then the basic restrictions will be complied with, but if the
reference levels are exceeded, that does not necessarily mean that the basic restriction will not be met.
4 © ISO 2017 – All rights reserved

3.26
reinforced insulation
insulation of hazardous live parts which provides a degree of protection against electric shock (3.6)
equivalent to double insulation (3.5)
Note 1 to entry: Reinforced insulation may comprise several layers which cannot be tested singly as basic
insulation (3.3) or supplementary insulation (3.30).
3.27
secondary device
device mounted on the EV, including all housings and covers, that captures the magnetic field sourced
by the primary device (3.23)
Note 1 to entry: When the EV is receiving power, the secondary device (3.28) transfers the power from the
primary to the EV.
3.28
secondary device ground clearance
vertical distance between the ground surface and the lowest point of the secondary device (3.28)
Note 1 to entry: The lower surface may not be planar and may not be parallel to the ground surface.
3.29
steady state
state of a system at which all state and output variables remain constant in time while all input variables
are constant
3.30
supplementary insulation
independent insulation applied in addition to basic insulation (3.3) for fault protection
3.31
supply device
off-board component assembly comprising the primary device (3.23), the supply power electronics (3.34)
and the supply device communication controller, as well as the mechanical connections between the
components necessary for wireless power transfer
3.32
supply equipment communication controller
SECC
entity which implements the communication to one or multiple EVCCs (3.8)
Note 1 to entry: Functions of an SECC control input and output channels, data encryption, or data transfer
between vehicle and SECC.
3.33
supply power circuit
off-board component assembly comprising the supply power electronics (3.34) and primary device (3.23),
as well as the mechanical connections between the components
3.34
supply power electronics
off-board electronics, including all housings and covers, that supply the electric power to the primary
device (3.23)
EXAMPLE PFC converter, DC-AC inverter, filter, impedance matching network.
3.35
system efficiency
efficiency from AC or DC power supply (input of the supply device) to the output of the EV device (3.9)
Note 1 to entry: It is of no importance whether the output is connected to a device or directly to a battery.
3.36
voltage class B
classification of an electric component or circuit with a maximum working voltage of >30 V and
≤1,000 V AC (rms) or >60 V DC and ≤1,500 V DC, respectively
4 Environmental conditions
Potential environmental stresses and related tests and requirements for electronic systems/components
mounted in specific locations on/in the vehicle are described in ISO 16750.
The environmental requirements applicable to a particular EV device shall be identified and agreed
between the customer and supplier and the compliance testing for these requirements shall be
performed in accordance with the following ISO standards:
— mechanical loads according to ISO 16750-3, test procedure type VI, vehicle body;
— climate loads according to ISO 16750-4;
— chemical loads according to ISO 16750-5.
5 System description
Figure 1 shows an example for the structure of an MF-WPT system.
Key
1 MF-WPT system 22 EV power electronics
11 primary device 23 EV communication controller (EVCC)
12 supply power electronics 24 EV power circuit (EVPC)
13 supply equipment communication controller (SECC) 25 EV device
14 supply power circuit 200 battery
a
15 supply device Wireless power flow.
b
100 grid Communication.
21 secondary device
NOTE The numbering convention adopted is based on system blocks being assigned a number with the
supply device blocks having numbers of the form “1X” and the EV device blocks of the form “2X”. The second digit
identifies equivalent functionality in the supply and EV sub-systems.
Figure 1 — MF-WPT system
6 © ISO 2017 – All rights reserved

6 MF-WPT interoperability
6.1 General
Interoperability refers to the capability of the supply device and the EV device being able to transfer
power wirelessly in a safe and efficient manner, based on compliance with the requirements in this
document.
In order to determine interoperability, an EV device shall be tested according to 6.6 with the reference
supply devices for which it is designed to operate.
NOTE 1 IEC 61980-3 will specify the reference supply devices. A supply device is designed so that it is operable
with the relevant reference EV devices, specified in this document. In order to determine interoperability, a
supply device is tested with the relevant reference EV devices specified in this document. This allows EV devices
and supply devices to be sourced independently.
NOTE 2 The interoperability of the functions and communication is specified in Clause 7 and Clause 8.
6.2 Classification of EV power circuits
6.2.1 General
The reference EV devices are classified by MF-WPT class and Z class.
NOTE For this document, it is assumed that supply devices are designed to serve all Z classes.
6.2.2 MF-WPT classes
An EVPC shall be classified for one or more MF-WPT classes.
The maximum power of an EVPC shall be specified.
A reference EV device is classified for one MF-WPT class.
Reference EV devices are verified to meet the performance requirements (see 6.3) up to the maximum
power of the MF-WPT class it is assigned to.
MF-WPT class interoperability requirements between the supply device and an EVPC are shown in
Table 1.
Table 1 — MF-WPT Class Interoperability Requirements
Supply device MF-WPT input power class
MF-WPT1 MF-WPT2 MF-WPT3 MF-WPT4
a a a
MF-WPT1 Required Required
a a a
MF-WPT2 Required Required
EVPC MF-
WPT class a a a
MF-WPT3 Required
a a a
MF-WPT4 Required
a
Under consideration.
MF-WPT class interoperability implies that the EV device shall be able to request adaptation of output
power of the supply device.
6.2.3 Z classes
The Z classes as specified in Table 2 are based on the secondary device ground clearance.
Table 2 — Z classes
Secondary device ground clear-
Z class ance
mm
Z1 100 to 150
Z2 140 to 210
Z3 170 to 250
NOTE Alternative for Z3 as 200 mm to 250 mm is under
discussion.
A reference EV device is verified to meet the performance requirements (see 6.3) within the entire
Z class for which it is specified.
The secondary device ground clearance range for which an EVPC is designed shall be specified.
An EVPC shall meet the performance requirements (see 6.3) within the secondary device ground
clearance range for which it is specified when tested with the reference supply device(s).
6.3 Performance requirements
6.3.1 General
An EVPC shall meet the performance requirements within the secondary device ground clearance range
and within the power range as specified by the manufacturer when tested with the corresponding
reference supply device.
6.3.2 Alignment tolerance requirements
The reference EV device are verified to meet the power transfer requirements as in 6.3.3 and the
system efficiency requirements as in 6.3.4 over its entire Z class and the alignment tolerances in x and
y direction (see Table 4).
An EVPC shall meet the requirements as in 6.3.3 and 6.3.4 over its entire secondary device ground
clearance range and the alignment tolerances in x and y direction (see Table 3).
NOTE 1 Compliance is verified by including the maximum misalignment point within the test plan. The test
conditions are defined in the test procedure.
NOTE 2 The alignment tolerances are defined with respect to the optimal alignment.
Table 3 — x and y alignment tolerance requirements
Axis Alignment tolerance (mm)
x ±75
y ±100
The EV may have the capability to assist the driver in aligning the vehicle for proper coupling between
the primary and secondary device. This functionality may require some support from the supply power
circuit and standardization of this mechanism may be desired. The definition of such a mechanism does
not preclude the use of alternate mechanisms by the EV.
6.3.3 Power transfer requirements
A reference EV device shall deliver the requested power under steady-state condition up to maximum
power of the MF-WPT class for which it is specified.
An EVPC shall deliver the requested power under steady-state condition up to the power for which it is
specified by the vehicle manufacturer.
8 © ISO 2017 – All rights reserved

A requested change in power delivery shall not cause a DC output voltage overshoot of an EVPC by more
than ±250 V/ms with the peak voltage not higher than 10 % of the nominal DC output voltage. The DC
output voltage ripple amplitude of an EVPC shall not exceed ±8 V.
6.3.4 System efficiency requirements
The minimum system efficiency shall be according to Table 4.
Table 4 — Minimum efficiency
Alignment Minimum system efficiency
Optimal alignment 85 %
Within alignment tolerance 80 %
If auxiliary loads (e.g. thermal management or foreign object detection) are mandatory for a system
specific application (e.g. higher power classes or higher flux), their power consumption shall also be
included in the system efficiency calculation.
If auxiliary loads are not mandatory and partial load is not applicable for a system specific application,
this shall be confirmed in a clear statement as part of the measurement procedure and type certification
documents.
6.4 Frequency
To ensure interoperability, the power transfer shall be operated within the system frequency range
respectively at the nominal frequency, according to Table 5.
Table 5 — Frequency
Description Frequency (kHz)
System frequency range 81,38 to 90,00
Nominal frequency 85 ± 0,1
A fixed-frequency system shall transfer the power at the nominal frequency.
For frequency-tuneable systems, the nominal frequency is typically observed under optimal alignment
and while the system is in a steady-state. Frequency-tuneable systems may transfer power at any
frequency within the system frequency range.
NOTE To optimize the system efficiency, the MF-WPT system (or the supply power circuit) can tune the
frequency within the system frequency range.
6.5 Reference EV devices
Reference EV devices for MF-WPT1 and MF-WPT2 are described in Annex A to Annex D.
NOTE Annex A to Annex D reflect the state-of-the-art proposals for reference EV devices that are under
discussion. Technical investigations are ongoing to specify the reference EV devices and interoperability
requirements.
6.6 Test procedure
Power transfer and system efficiency requirements shall be tested with the following setup:
— the EV device is connected to a battery or a simulated DC load.
Power transfer and system efficiency requirements shall be tested under the following conditions:
— ambient temperature of 25 °C ± 5 °C;
— the system is in steady-state;
— output voltage of the EV device of 280 V, 350 V and 420 V;
— maximum output power of the EV device. The maximum output power of the EV device is specified
by the manufacturer.
NOTE 1 According to Figure 1, “output power of the EV device” means the power which the EV device is able to
provide to the battery.
NOTE 2 Other output voltage can be selected in the future application.
Power transfer and system efficiency requirements shall be tested in the positions as specified in
Figure 2.
Key
1 optimal alignment
NOTE The coordinate system complies with ISO 4130.
Figure 2 — Measurement positions
The values of the measurement position in Figure 2 are given in Table 6.
10 © ISO 2017 – All rights reserved

Table 6 — Measurement positions
Coordinate value (mm)
Point
Secondary device ground clearance (Z)
X Y
X Y Z
Z1 class Z2 class Z3 class
P P P 150 210 250
+100
P P N 100 140 170
P 0 P 150 210 250
+75 0
P 0 N 100 140 170
P N P 150 210 250
−100
P N N 100 140 170
0 P P 150 210 250
+100
0 P N 100 140 170
0 0 0 125 175 210
0 0
0 0 N 100 140 170
0 N P 150 210 250
−100
0 N N 100 140 170
N P P 150 210 250
+100
N P N 100 140 170
N 0 P 150 210 250
-75 0
N 0 N 100 140 170
N N P 150 210 250
−100
N N N 100 140 170
The values for the secondary device ground clearance shown in Table 6 are used for measuring reference
EV devices. For testing EV devices, the maximal and minimal secondary device ground clearance shall
be according to the specification by the manufacturer.
7 Functions
7.1 Communication setup
Communication setup shall be initiated by the EVCC. The EVCC shall be able to verify communication is
properly established.
7.2 Service selection
7.2.1 General
The EVCC shall request available services and possible power transfer options from the SECC.
In order to be able to serve multiple EVs with different EVPC power classes or other different MF-WPT
system characteristics, a supply site may be organized to offer different options for WPT at different
supply power circuits which are all using one SECC in common for communication. This function will
allow the EVCC and SECC to determine what fine positioning and pairing methods to use. This function
may increase comfort in terms of a pre-selection of valid WPT options and optimization of guidance
functionality. The SECC may provide the same information as in the final compatibility check, as well as
information about the methods for fine positioning, pairing and initial alignment check. The situation
of a home garage with a SECC serving only one primary device maybe treated as a special case of the
situation sketched above.
7.2.2 Parameters to be exchanged for interoperability
The EVCC shall send the following parameters for service selection:
— EVPC power class;
— maximum receivable power;
— maximum secondary device ground clearance;
— minimum secondary device ground clearance;
— minimum operating frequency;
— maximum operating frequency;
— type of geometry of the secondary device;
— circuit topology;
— fine positioning methods;
— pairing methods;
— initial alignment check methods;
— manufacturer ID;
— manufacturer specific data container;
— specific Service Provider (optional).
NOTE The EVCC expects corresponding information from the SECC according to IEC 61980–2 (under
development).
7.3 Fine positioning
Fine positioning begins when the EV is entering the chosen WPT spot and guidance is provided to the
driver. The goal is to reach an alignment within the alignment tolerance requirements (see 6.3.2). The
method for fine positioning shall be chosen during service selection.
7.4 Pairing
The EV shall initiate the pairing process by sending a pairing request to the SECC.
The method for pairing is chosen during service selection. The EVCC shall be able to confirm pairing.
7.5 Final compatibility check
The compatibility of the primary and the secondary device shall be checked after pairing and prior to
power transfer.
The EVCC shall confirm compatibility with the SECC.
7.6 Initial alignment check
The EV shall request the initial alignment check to be performed by the supply device using the method
that was chosen during service selection.
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The initial alignment check ensures that alignment is within the alignment tolerance requirements (see
6.3.2) before the power transfer starts.
NOTE The function is performed by the supply device according to IEC 61980-2 (under development).
7.7 Start power transfer
Power transfer shall be initiated by request of the EV.
The EV shall request power transfer only when safety monitoring and diagnostic functions according to
7.12 are active.
7.8 Power saver mode
7.8.1 Start power saver mode
To start power saver mode, the EVCC shall inform the SECC that power saver mode will be turned on,
and provides the duration for the power saver mode.
In case the SECC agrees, then the EV may go into power saver mode.
SECC and EVCC may negotiate an extension to the power saver mode.
7.8.2 Terminate power saver mode
Once the negotiated time has expired, the EV terminates power saver mode.
The EV may terminate power saver mode at any time.
NOTE Further actions after termination of power saver mode are under consideration.
7.9 Perform pow
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