Document No:
GSC16-PLEN-31
Source:
TTA
Contact:
Seung-ok LIM
GSC Session:
PLENARY
Agenda Item:
6.13
Wireless Charging System
Seung-ok Lim
TTA
Halifax, 31 Oct – 3 Nov 2011
ICT Accessibility For All
GSC16-PLEN-31
Wireless Charging System
•
Transfer electric power to mobile nearby devices (less than several meters)
and charge batteries
Halifax, 31 Oct – 3 Nov 2011
ICT Accessibility For All
2
GSC16-PLEN-31
Technical Trends

Qualcomm
 Announcement of eZone, a
wireless power transfer system, in
CES2009
 Maximum supportable devices: 2
 Maximum charging distance: 0.2m
Intel
 12W power transfer to
netbook in 3feet
 Receiver coils in the cover of
netbook
 Independent standardization
activity on 100W wireless
power transfer

Qualcomm-WiPower
 Takeover WiPower in 2010 for
developing a wireless power
transfer system
 Developing power transfer system
in vehicles
 Charging distance: 0.05m
Sony
 Power transfer to 22 LCD TV
60W
 Efficiency: about 80% @
50cm
 Charging distance increases
by repeaters

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

WiTricity-Haire
 WiTricity, a spin-off company
from MIT
 Power transfer to Full HD TV
in CES 2010


Halifax, 31 Oct – 3 Nov 2011
ICT Accessibility For All
3
GSC16-PLEN-31
Highlight of Current Activities
• TTA PG 709 (Wireless Charging and Application)
– Established in Mar. 2011
– Scope:
 Standard roadmap
 Power transfer interface
 Control mechanism
– 12 members
TTA PG709
Steering Committee
WG 1
- Service & Structure
Halifax, 31 Oct – 3 Nov 2011
WG 2
-Interface
ICT Accessibility For All
WG 3
-Evaluation
4
GSC16-PLEN-31
Strategic 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
5
GSC16-PLEN-31
Overview 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
Halifax, 31 Oct – 3 Nov 2011
ICT Accessibility For All
6
GSC16-PLEN-31
Challenges
• 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
7
GSC16-PLEN-31
Next 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
Halifax, 31 Oct – 3 Nov 2011
ICT Accessibility For All
8