Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All

Wireless Charging SystemWireless Charging System

Seung-ok LimSeung-ok Lim

TTATTA

Document No:

GSC16-PLEN-31

Source: TTA

Contact: Seung-ok LIM

GSC Session:

PLENARY

Agenda Item:

6.13

Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All

GSC16-PLEN-31

Wireless Charging SystemWireless Charging System• Transfer electric power to mobile nearby devices (less than several meters)

and charge batteries

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Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All

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Technical TrendsTechnical Trends

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WiTricity-Haire WiTricity, a spin-off company

from MIT Power transfer to Full HD TV

in CES 2010

Intel 12W power transfer to

netbook in 3feet Receiver coils in the cover of

netbook Independent standardization

activity on 100W wireless power transfer

Sony Power transfer to 22 LCD TV

60W Efficiency: about 80% @

50cm Charging distance increases

by repeaters

Qualcomm Announcement of eZone, a

wireless power transfer system, in CES2009

Maximum supportable devices: 2 Maximum charging distance: 0.2m

Qualcomm-WiPower Takeover WiPower in 2010 for

developing a wireless power transfer system

Developing power transfer system in vehicles

Charging distance: 0.05m

Fujitsu Simultaneous charging to two

mobile phones in Sep. 2010 Development of a simulator which

is used for analysis of magnetic fields between multiple coils

Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All

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Highlight of Current ActivitiesHighlight of Current Activities• TTA PG 709 (Wireless Charging and Application)

– Established in Mar. 2011– Scope:

Standard roadmap Power transfer interface Control mechanism

– 12 members

- Service & Structure- Service & Structure -Evaluation

-Evaluation-Interface-Interface

TTA PG709

Steering Committee

WG 1 WG 2 WG 3

Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All

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Strategic DirectionStrategic Direction• Market Analysis – Strong needs

− 16 billion dollars expected in 2014 (Isuppli 2010)

• TTA’s plans− Use case & service scenario (4Q in 2011)− Standard

Wireless Charging protocol (1Q in 2012) Wireless Charging interface (1Q in 2012) Transfer efficiency and measurement (4Q in

2012)

• Collaboration− Cooperation and the sharing of information with

SDOs

Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All

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Overview of Wireless Charging SystemOverview of Wireless Charging System• Wireless Charging System

– How to transfer power and charge efficiently– Devices which have a battery

• Wireless Power Transfer System– How to transfer power efficiently– All electric devices

• Difference from cable chargers– Elimination of complicated wire cables– Safety from electric shock– Increased mobility– Relatively low efficiency (about 90% efficiency of cable chargers)

• Considered frequency bands– 20~60 kHz – 80~370 kHz– 6.78, 13.56 MHz

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Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All

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ChallengesChallenges• Product Diversification

– As market is increasing, each vendor makes the Wireless Charging system which has different structure & protocol

– Wireless Charging is possible only between systems having the same structure & protocol

• Frequency Issues– Each vendor considers different frequency bands for Wireless

Charging which disables interoperability between Wireless Charging systems

• Regulation Issues– Each nation has different regulation for EMI/EMC, SAR, etc.

Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All

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Next Steps / ActionsNext Steps / Actions• Standardization Activities for product diversification

– System & interface– Control & management protocol– Conformance test & certification

• Regulation Coordination & Compromise– Frequency band– EMI/EMC– SAR

• Activities toward the global harmonization– Cooperation with other SDOs– Investigation of the similar activities and directions in other

organizations