Another story came out yesterday, saying that Boeing intends to provide more space between cells. It's worth mentioning, however, that Boeing's spokespeople are not commenting, so we don't know for sure.
I saw a graphic that Boeing was going to stick a vented containment around the existing battery box. I doubt that will satisfy the FAA and NTSB. Aside of the whole qualification time lag, why wouldn't they swap the Lion battery units with NiMH-based assemblies? Since they seem to have the space to put a box around the existing box, they could definitely go to a lower energy density battery technology.
this link shows some of the aviation incidents involving smoke, fire, extreme heat or explosion - and we continue to fly. 787 battery issue is a marketing issue, I hope the Dreamliner wil not change the name to Incubusliner.
@g_ost: It's hard to tell whether Airbus's decision to switch to NiCd for the A350 is more about public relations or safety. They've been flying A350s with lithium-ion batteries successfully so far. But being able to say that they don't have the "bad" battery chemistry that Boeing has may give Airbus an advantage with customers and regulators.
Due to 787 battery problems Airbus dispensed for A350 to the installation of lithium batteries. The first aircraft will be delivered with cadmium batteries, not lithium batteries. But the first test flights will attend Airbus with lithium batteries.
For large capacity multi cell series/parallel batteries each series stack typically will have its own controller. If thermal runaway begins in one cell, the consensus seems to be removing the charging current will NOT stop the runaway. See the nfpa link:
Other links regarding marine applications of lithium-ion batteries indicate that monitoring the individual cells (series stacks) is absolutely critical to prevent runaway. If this degree of protection is reasonable for a boat, I can't imagine it isn't practiced on an aircraft.
Yes, isolating each cell physically and electrically is doable, at a cost - but, if due to manufacturing defect or degradation over time, a cell develops an internal short, is it sufficient to just stop the charging current? Or will the stored energy through the short circuit lead to thermal runaway anyway? Does anybody here know?
BMW has already incorporated more than 10,000 3D-printed parts in the Rolls-Royce Phantom and intends to expand the use of 3D printing in its cars even more in the future. Meanwhile, Daimler has started using additive manufacturing for producing spare parts in Mercedes-Benz Trucks.
Researchers have been developing a number of nano- and micro-scale technologies that can be used for implantable medical technology for the treatment of disease, diagnostics, prevention, and other health-related applications.
SABIC's lightweighting polycarbonate glazing materials have appeared for the first time in a production car: the rear quarter window of Toyota's special edition 86 GRMN sports car, where they're saving 50% of its weight compared to conventional glass.
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