REGISTER | LOGIN
Breaking News
Comments
Oldest First | Newest First | Threaded View
Bert22306
User Rank
Author
re: Were the Boeing 787 batteries cooled properly?
Bert22306   2/7/2013 10:26:26 PM
NO RATINGS
Gratified to see that the focus of the investigation is going to the battery itself, which IMO was always the most likely suspect. It will be interesting to see what cooling measures were adopted, because it seems unlikely that this design requirement was simply ignored. Also, before the press get all wound up about cooling, note that only two batteries, out of all the batteries in all the 787s out there, had this heat stress problem. Was the cooling design too close to the margin? Or was there something anomalous about some of the battery packs? It looks like some lithium-ion variants are more prone to overheating than others, for example. My bet continues to be on the battery design itself. However this does not preclude taking other steps, to make even the more overheating-prone samples of such batteries safe to use.

R Sweeney
User Rank
Author
re: Were the Boeing 787 batteries cooled properly?
R Sweeney   2/10/2013 8:35:40 PM
NO RATINGS
Pictures of the battery make it appear that there were no cooling fans, no active liquid coolers, no heat pipes or even heat sinks in the battery design, only a 1/2" air channel around each cell to provide convective coupling to the metal battery case. This is very interesting considering the battery packs were designed for high discharge/charge rates. Elon Musk, who knows a bit about this, said the 787 battery design was incompetent and dangerous.

selinz
User Rank
Author
re: Were the Boeing 787 batteries cooled properly?
selinz   2/13/2013 8:35:57 PM
NO RATINGS
This will most likely result in some kind of legislation...

lcs1956
User Rank
Author
re: Were the Boeing 787 batteries cooled properly?
lcs1956   2/27/2013 12:36:33 AM
NO RATINGS
Has anyone considered the lack of adequate convective cooling at cruising altitude? I used to work at Los Alamos in the 80s and several devices designed at sea level would fail due to overheating at the 7700 feet altitude arising from the lower air density, especially CRT computer terminals.



Like Us on Facebook
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Martin Rowe

Test Tool Finds Ethernet Wiring Errors
Martin Rowe
Post a comment
When my house was renovated several years ago, I had the electrician install network outlets in numerous places, then run the LAN cables to a wiring closet. But he didn't document the ends ...

Martin Rowe

Local Electronics Store Supplies Engineers and Hobbyists
Martin Rowe
5 comments
Rochester, N.Y. — Tucked away in this western New York city known for its optics is Goldcrest Electronics, a local store that's supplied businesses and individuals with electronic ...

Martin Rowe

How to Transform a Technology University (Book Review)
Martin Rowe
1 Comment
The Presiding Genius of the Place by Alison Chisolm. WPI, Worcester, Mass., 234 pp., 2016. Engineers love to discuss, and often criticize, engineering education. They often claim ...

Max Maxfield

Aloha from EEWeb
Max Maxfield
Post a comment
Just a few minutes ago as I pen these words, I posted this blog about this month's Cartoon Punchline Competition over on EEWeb.com.