IEC TR 63071:2016

IEC TR 63071 ®
Edition 1.0 2016-12
TECHNICAL
REPORT
colour
inside
Power supplying scheme for wearable systems and equipment

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IEC TR 63071 ®
Edition 1.0 2016-12
TECHNICAL
REPORT
colour
inside
Power supplying scheme for wearable systems and equipment

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.200 ISBN 978-2-8322-3685-7

– 2 – IEC TR 63071:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 System model . 6
4.1 General . 6
4.2 Existing model . 6
4.3 System models of wearable devices. 7
4.3.1 Wearable devices . 7
4.3.2 Charging and connections . 8
4.3.3 Generator utilizing physical activity of organism . 8
5 Use case . 9
5.1 General . 9
5.2 Use case examples . 9
5.2.1 Generator in shoes . 9
5.2.2 Animal tracking . 9
6 Interface . 10
7 Measurement method . 10
Bibliography . 12

Figure 1 – Solar cell with a secondary battery wristwatch. 7
Figure 2 – Generator with secondary battery . 7
Figure 3 – Generator in shoe . 9
Figure 4 – Animal use . 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER SUPPLYING SCHEME FOR WEARABLE
SYSTEMS AND EQUIPMENT
FOREWORD
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The main task of IEC technical committees is to prepare International Standards. However, a
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example "state of the art".
IEC TR 63071, which is a Technical Report, has been prepared by IEC technical committee
100: Audio, video and multimedia systems and equipment.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
100/2751/DTR 100/2816/RVC
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC TR 63071:2016 © IEC 2016
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the specific document. At this date, the document will be
• reconfirmed,
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INTRODUCTION
Wearable devices are being introduced into the market, but each device employs its own
power charging method and power source device. Wearable devices are used to support
human life and health. The duration and life of the power source, as well as easy charging
and replacing of a power source, is a crucial factor for wearable devices that are primarily
powered by batteries. A power generator is one solution for this power duration or life, since it
provides power generated by user activities and/or also from environmental sources. Also,
connectivity and compatibility of power and data transmission is important.
This Technical Report does not specify the power generating or energy harvesting methods
and devices themselves, but focuses on interoperability and measurement methods of power-
suppling devices and systems.
– 6 – IEC TR 63071:2016 © IEC 2016
POWER SUPPLYING SCHEME FOR WEARABLE
SYSTEMS AND EQUIPMENT
1 Scope
This document provides models and frameworks for the power-supplying scheme for wearable
systems and equipment. This document does not specify power generating or energy
harvesting methods and the devices themselves.
2 Normative references
There are no normative references in this document.
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
energy harvest
technique to obtain energy from surroundings such as electric power from the activity of
organisms
3.2
kinetic generator
generator that utilizes kinetic energy to generate electric power
4 System model
4.1 General
The power-supplying system for audio, video and multimedia systems and equipment can be
applicable to wearable systems and equipment. Among them, the power supplying systems of
energy harvesting devices or systems are suitable for the wearable devices because they
generate energy.
Energy-harvesting devices or systems have already been used in various pieces of equipment
such as electronic wrist watches. The existing model is described in 4.2.
4.2 Existing model
A major existing model of wearable equipment and power supply is the electronic wristwatch.
Power supply methods for electronic wristwatches include:
• primary batteries,
• secondary batteries,
• solar cells with secondary batteries,

• a generator with a secondary battery.
To charge the secondary battery, wired power transfer is a common method. Its connector is
for example a USB connector specified in the IEC 62680 series or other type of dedicated
connector.
Wireless power transfer is not a common method for wristwatches, but it is applied for health
band type wearable equipment that has also a watch function. However, wireless power
transfer is not applied when a wristwatch is worn but applied when it is taken off and when it
is charg
...