Avionics News December 2015 - 46
NEW ENERGY IN BATTERY TECHNOLOGY
Continued from page 45
else - our smartphones, music players, tablets and
notebook computers.
In cars and airplanes? Not so much. The auto market
will take care of itself when the right costs/benefit curves
cross.
In aviation, True Blue Power started overcoming
barriers to its new-technology lithium-ion main-ship
batteries more than five years ago - and in panels years
before that.
The TB44 is TSO C179a and EASA ETSO certified,
RTCA DO-311 and DO-160G qualified.
Gaining the first U.S. and European TSOs opened the
door to the STCs that followed. Those STCs came out of
the recognition of the advantages of the True Blue Power
options.
Viva la difference
Winter long ago recognized that prying open the
door to lithium-ion technology in main-ship batteries
required two things: First, a chemistry and technology
combination lacking the potential to produce the
problems experienced so far; second, enough acceptance
The challenge: A fail-safe design
to start a ball rolling as operators accept the safer battery
The threshold went up significantly after a series
technology and believe the significant benefits offered
of malfunctions of lithium-ion main-ship batteries in
by True Blue Power's battery
commercial aircraft. The most
technology.
notable afflicted new Boeing
With the chemistry
True Blue Power teamed with the
787 airliners, a new, delaytechnology licensed from
customer, Canadian carrier
plagued aircraft barely into
A123 Systems, True Blue
Avmax,
to earn STC approval from Power started designing
service when multiple mainTransport Canada, the approval on products employing A123's
ship battery failures prompted
the FAA and operators to
Nanophosphate Lithium-ion
which the companies based their
ground the fleet - not an
chemistry. The first products
application for an FAA STC.
unprecedented action, but one
were standby batteries for
extremely rare.
electrical flight instruments
Boeing came back with a
and avionics; then the
new battery design, a new container design and software
company started integrating purpose-designed batteries
changes to its electrical-system controls, and the problem
into its standby instrument products.
appears to be in the past.
Then came the launch of True Blue Power's first
But the potential for lithium-ion batteries to cause
aircraft main-ship batteries - using A123's technology
the same type of problem underpins existing bans on
and physically designed to prevent the failure of a single
air shipment of bulk lithium-ion batteries of all kinds
cell from starting a thermal runaway.
and restrictions on where and how many passengers are
A123 Systems technology differs from other lithium-ion
allowed to carry on airliners.
chemistries in that if punctured, penetrated or overheated,
With that as a background, it's not difficult to
the failure starts a thermal reaction that quickly consumes
understand how aircraft owners and operators might
itself and expires - with a significantly reduced chance
resist the idea of lithium-ion as their aircraft's main-ship
of reaching temperatures capable of overheating adjacent
battery.
cells and without fueling its own fire in the failure.
The inability of the A123 Systems cells used in True
Temperatures peak around the boiling point of water and
Blue Power batteries to produce the same type of failure
drop quickly as the electrolyte of one cell is consumed.
was the main thrust of the company's initial introduction
Other batteries behave the opposite if a cell fails or
in 2013.
a short develops: Heat quickly builds into the hundreds
The advantages, highlighted at the same time, become
of degrees and the ensuing chemical reaction produces
the attraction after showing how this battery resolves the
its own fuel to feed a fire, meanwhile exposing adjacent
threat of a thermal runaway of the type suffered by the
cells to heat in excess of their design tolerance, and the
Boeing batteries.
failures cascade like a chain reaction.
Testament to that came when True Blue Power won the
It is the differences in chemistry and construction that
first FAA TSO and EASA European technical standard
order certification for lithium-ion main-ship batteries.
Continued on page 48
46
avionics news
*
december
2015
Table of Contents for the Digital Edition of Avionics News December 2015
Avionics News December 2015 - Intro
Avionics News December 2015 - Cover1
Avionics News December 2015 - Cover2
Avionics News December 2015 - 1
Avionics News December 2015 - 2
Avionics News December 2015 - 3
Avionics News December 2015 - 4
Avionics News December 2015 - 5
Avionics News December 2015 - 6
Avionics News December 2015 - 7
Avionics News December 2015 - 8
Avionics News December 2015 - 9
Avionics News December 2015 - 10
Avionics News December 2015 - 11
Avionics News December 2015 - 12
Avionics News December 2015 - 13
Avionics News December 2015 - 14
Avionics News December 2015 - 15
Avionics News December 2015 - 16
Avionics News December 2015 - 17
Avionics News December 2015 - 18
Avionics News December 2015 - 19
Avionics News December 2015 - 20
Avionics News December 2015 - 21
Avionics News December 2015 - 22
Avionics News December 2015 - 23
Avionics News December 2015 - 24
Avionics News December 2015 - 25
Avionics News December 2015 - 26
Avionics News December 2015 - 27
Avionics News December 2015 - 28
Avionics News December 2015 - 29
Avionics News December 2015 - 30
Avionics News December 2015 - 31
Avionics News December 2015 - 32
Avionics News December 2015 - 33
Avionics News December 2015 - 34
Avionics News December 2015 - 35
Avionics News December 2015 - 36
Avionics News December 2015 - 37
Avionics News December 2015 - 38
Avionics News December 2015 - 39
Avionics News December 2015 - 40
Avionics News December 2015 - 41
Avionics News December 2015 - 42
Avionics News December 2015 - 43
Avionics News December 2015 - 44
Avionics News December 2015 - 45
Avionics News December 2015 - 46
Avionics News December 2015 - 47
Avionics News December 2015 - 48
Avionics News December 2015 - 49
Avionics News December 2015 - 50
Avionics News December 2015 - 51
Avionics News December 2015 - 52
Avionics News December 2015 - 53
Avionics News December 2015 - 54
Avionics News December 2015 - 55
Avionics News December 2015 - 56
Avionics News December 2015 - 57
Avionics News December 2015 - 58
Avionics News December 2015 - 59
Avionics News December 2015 - 60
Avionics News December 2015 - 61
Avionics News December 2015 - 62
Avionics News December 2015 - 63
Avionics News December 2015 - 64
Avionics News December 2015 - 65
Avionics News December 2015 - 66
Avionics News December 2015 - 67
Avionics News December 2015 - 68
Avionics News December 2015 - 69
Avionics News December 2015 - 70
Avionics News December 2015 - 71
Avionics News December 2015 - 72
Avionics News December 2015 - Cover3
Avionics News December 2015 - Cover4
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