I believe the one Richard was mentioning was at an airport in Japan where t= here was some battery backed equipment in a locker in the rear of the aircr= aft that failed. I do remember seeing photos (I think they were linked in a= post from this forum) of the resulting mess. The plane was being serviced = between flights when the battery failed, so there was no crash as such from= it. -----Original Message----- From: piclist-bounces@mit.edu On Behalf Of Forres= t Christian (List Account) Sent: 02 August 2018 12:53 To: Microcontroller discussion list - Public. Subject: Re: [OT] a ten second evac warning for venting lithium batteries I'm not aware of a recent crash caused by lithium batteries.... The only o= ne I'm aware of is a UPS 747 which had a pallet of them in the cargo hold back in 2010. Maybe this was what you were thinking of. I believe this event is why you can't ship most lithium batteries by air. There have been a couple of recent crashes where they were suspected, but neither were conclusive. One being mh370, the other being ms304. And yes, Boeing seems to be continuing to have lithium battery failures/fi= res in the 787, but so far none has caused a hull loss that I'm aware of. On Thu, Aug 2, 2018, 12:25 AM Richard Pope wrote: > James, Ryan, > What has happened is a cascade failure. Remember that a battery=20 > is made of several cells. When one of these cells failed it overheated=20 > the cells around it. This caused these cells to fail and this=20 > overheated surrounding cells and so forth. The lithium in the=20 > batteries would react in a violent manner to the oxygen in the air=20 > when the cells were breached. Once this type of failure starts there is n= o way to stop it. > This is what happen to a 777 Dreamliner a few years ago. It brought=20 > the plane down. Since then Boeing has changed the design of the=20 > battery and installed it in a stronger containment system that has an=20 > external vent system. > GOD Bless, > rich! > > On 8/2/2018 1:01 AM, Ryan O'Connor wrote: > > I can't think of any explainable reason why the venting would=20 > > increase > when > > the charger was pulled out (the chinese report had a second camera=20 > > angle showing he definitely pulled the plug out. it also has sound,=20 > > an audible pop is heard first when the dog jumps). However it is=20 > > surprising how quickly it escalated considering it was unplugged. > > > > Ryan > > > > On Thu, 2 Aug 2018 at 17:40, James Cameron wrote: > > > >> > http://www.abc.net.au/news/2018-08-02/electric-scooter-explodes-while- > charging-in-china/10066416 > >> > >> Battery begins to vent. Operator disconnects charger. Venting=20 > >> increases by orders of magnitude. Operator evacuates. Vented gas=20 > >> ignites. > >> > >> What has interested me is; > >> > >> - only ten seconds before "flames", > >> > >> - did the venting increase because of charger being turned off? > >> > >> -- > >> James Cameron > >> http://quozl.netrek.org/ > >> -- > >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive=20 > >> View/change your membership options at=20 > >> http://mailman.mit.edu/mailman/listinfo/piclist > >> > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive=20 > View/change your membership options at=20 > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .