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Old 01-12-2013, 10:19 AM   #11
_cy_ OP
Beastly Adventurer
Joined: Sep 2011
Location: Tulsa, Oklahoma
Oddometer: 6,435
winter is trying to make a comeback in Tulsa, OK...

here's a Press Release from 2006, re: Thales and GS Yusa, makers of Li-ion prismatic cells for Boeing 787.
GS Yusa makes aircraft Lithium Cobalt Oxide prismatic cells in 10 and 65 amp hour sizes.

besides main power backup for entire aircraft. above lithium cobalt li-ion batteries are also used to backup electronic aircraft control systems used extensively on Boeing 787.

it's understandable why lithium cobalt were spec'd back in 2005 era. but what's not understandable is why project engineers didn't pickup on the rash of new data generated by all the li-ion (lithium cobalt) fires connected to Sony laptops, etc and other consumer li-ion powered devices exploding.

then factor in fires related to transporting li-ion batteries resulting in new regs by FAA restricting transport on aircraft. it's inexcusable Boeing project engineers didn't pickup on inherent dangers related to lithium cobalt batteries.

what's most worrisome ... should a li-ion battery fire start on a backup power unit for an airplane control. fire could take out a perfectly good electronic control system causing aircraft to lose part of it's flight controls.

IMHO lithium cobalt cells should have never been allowed into production for this mission critical application.

Thales selects GS Yuasa for Lithium ion battery system in Boeing’s 787 Dreamliner
June 12, 2005, Thales will incorporate the latest lithium-ion technology from Japan’s leading
battery manufacturer, GS Yuasa, in the Electrical Power Conversion System of Boeing’s next
generation commercial airliner, the 787 Dreamliner. The multi-year, multi-million dollar contract
is a historic first as it marks the first commercial aviation application of Li-ion technology
anywhere in the world.

GS Yuasa’s Li-ion batteries will play a key role in on-board power, providing both Auxiliary
Power Unit start and emergency power back-up capabilities. In the first phase of the contract, GS
Yuasa will deliver prototypes to Thales starting in spring, 2005 and mass production will starts
for Boeing’s latest plane in 2007. ~

_cy_ screwed with this post 01-12-2013 at 11:03 AM
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