"And so the fundamental question for me is simple: Why? Why use Lithium-based chemistry for a flight battery pack. Yes, I know, lower weight, lower volume."
And more power density. I'm hoping an aeronautical engineer will eventually chime in, but this document is a pretty good technical read:
The major change was going to a "no-bleed" engine setup which allows for more efficiency. But it also means you need a much more powerful battery to start up the secondary power systems.
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"And so the fundamental question for me is simple: Why? Why use Lithium-based chemistry for a flight battery pack. Yes, I know, lower weight, lower volume."
And more power density. I'm hoping an aeronautical engineer will eventually chime in, but this document is a pretty good technical read:
http://www.boeing.com/commercial/aeromagazine/articles/qtr_4...
Or this One:
http://gm-volt.com/2012/03/30/the-all-electric-boeing-787/
The major change was going to a "no-bleed" engine setup which allows for more efficiency. But it also means you need a much more powerful battery to start up the secondary power systems.