Breaking News
Comments
Newest First | Oldest First | Threaded View
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.

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...

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.

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.



Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Radio
LATEST ARCHIVED BROADCAST

What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.

Brought to you by:

Most Recent Comments
rick merritt
 
Saturation
 
DCH0
 
realjjj
 
traneus
 
realjjj
 
realjjj
 
Doug_S
 
spike_johan
Like Us on Facebook
Special Video Section
Once the base layer of a design has been taped out, making ...
In this short video we show an LED light demo to ...
The LTC2380-24 is a versatile 24-bit SAR ADC that combines ...
In this short video we show an LED light demo to ...
02:46
Wireless Power enables applications where it is difficult ...
07:41
LEDs are being used in current luxury model automotive ...
With design sizes expected to increase by 5X through 2020, ...
01:48
Linear Technology’s LT8330 and LT8331, two Low Quiescent ...
The quality and reliability of Mill-Max's two-piece ...
LED lighting is an important feature in today’s and future ...
05:27
The LT8602 has two high voltage buck regulators with an ...
05:18
Silego Technology’s highly versatile Mixed-signal GreenPAK ...
The quality and reliability of Mill-Max's two-piece ...
01:34
Why the multicopter? It has every thing in it. 58 of ...
Security is important in all parts of the IoT chain, ...
Infineon explains their philosophy and why the multicopter ...
The LTC4282 Hot SwapTM controller allows a board to be ...
This video highlights the Zynq® UltraScale+™ MPSoC, and sho...
Homeowners may soon be able to store the energy generated ...
The LTC®6363 is a low power, low noise, fully differential ...