HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
News
Electronics & Test
NTSB: Short Circuit Caused 787 Battery Fire
2/12/2013

NTSB chairman Deborah Hersman said last week that investigators have concluded that a short circuit occurred in cell number six of the pack's eight cells.   (Source: NTSB)
NTSB chairman Deborah Hersman said last week that investigators have concluded that a short circuit occurred in cell number six of the pack's eight cells.
(Source: NTSB)

Return to Article

View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 5/5
richnass
User Rank
Blogger
Re: Cause or Effect
richnass   2/12/2013 11:01:31 AM
NO RATINGS
tekochip, if I understand where you are going, is it the blame of the battery itself, or the electronics surrounding the pack. I'd be surprised if anyone takes "credit" for this mishap.

tekochip
User Rank
Platinum
Re: Cause or Effect
tekochip   2/12/2013 10:00:30 AM
NO RATINGS
I understand that, but did the cell fail from being overheated, or did it become hot because it had failed?  The folks at Tesla and others have said that this type of pack requires active cooling.  If that's true will an overheated cell fail by shorting, or was the cell poorly constructed, shorted and then caused the thermal runaway?

g_ost
User Rank
Gold
Re: Cause or Effect
g_ost   2/12/2013 9:37:37 AM
NO RATINGS

G-Yuasa at NASA Aerospace Battery Workshop 2011/November 15, 2011

https://batteryworkshop.msfc.nasa.gov/presentations/04_Qualification%20of%20GS%20Yuasa%20Large%20Format%20Li-ion%20Cells%20for%20Space.pdf

the cell presented is not the one from 787 but the technology should be similar.

The 787 battery pack has 8 cells serial hard connected. The cells can not be individual switched off in case of failure. The damaged cell still getting power from the good cells and aggravate the issue.

tekochip
User Rank
Platinum
Cause or Effect
tekochip   2/12/2013 8:29:25 AM
The classic question.  Was it a manufacturing problem in the battery pack that caused the cell to short or did the pack overheat and then a cell failed, as so many people looking from the outside have suggested?

<<  <  Page 5/5
Partner Zone
Latest Analysis
Self-driving vehicle technology could grow rapidly over the next two decades, with nearly 95 million “autonomous-capable” cars being sold annually around the world by 2035, a new study predicts.
MIT’s Senseable City Lab recently announced the program’s next big project: “Local Warming.” The concept involves saving on energy by heating the occupants within a room, not the room itself.
The fun factor continues to draw developers to Linux. This open-source system continues to succeed in the market and in the hearts and minds of developers. Design News will delve into this territory with next week's Continuing Education Class titled, “Introduction to Linux Device Drivers.”
Dean Kamen tells an audience at MD&M East 2014 how his team created the DEKA Arm to meet DARPA's challenge to design a better prosthetic arm for wounded veterans.
The new draw-it-on-a-napkin is the CAD program. As CAD programs become more ubiquitous and easier to use, they have replaced 2D sketching for early concepting.
More:Blogs|News
Design News Webinar Series
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
7/17/2014 11:00 a.m. California / 2:00 p.m. New York
6/25/2014 11:00 a.m. California / 2:00 p.m. New York
5/13/2014 10:00 a.m. California / 1:00 p.m. New York / 6:00 p.m. London
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Aug 4 - 8, Introduction to Linux Device Drivers
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: August 12 - 14
Sponsored by igus
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service