I've never used a BMS on any of my setups. It's true that this presents a risk, but knowing your battery chemistry and charging parameters can go a long way... I have exploded batteries, but not in a way that a BMS would detect. I did it the old fashioned way... ignite the hydrogen 😊
Damon ________________________________ From: EV <ev-boun...@lists.evdl.org> on behalf of Matthew Quitter via EV <ev@lists.evdl.org> Sent: Tuesday, December 4, 2018 9:30 AM To: Electric Vehicle Discussion List Cc: Matthew Quitter Subject: Re: [EVDL] Tesla battery cells (no BMS) burst into flame... I still don’t know what actually caused the fault. From what I watched on the video and previous ones on that project they’re still in the preliminary planning stages. It appears the pack was not connected to anything, just placed in the car. Is that correct? Which would suggest it spontaneously failed - something I’ve never heard of and tell customers never happens. Worrying as I have 10 Tesla Model S modules sitting waiting to go into a couple projects! Perhaps there was a defect in the module? Or it was removed from its plastic casing and rested against something conductive?! I would like to know what actually caused the initial failure before thermal runaway. Matthew London Electric Cars > On 4 Dec 2018, at 17:15, EVDL Administrator via EV <ev@lists.evdl.org> wrote: > > Not that I want to start an argument, but IMO those folks who say "I don't > need no stinkin' BMS!" should be required to watch the hot action part of > that video clip at least once -- just so they give it a little more thought. > > The "live ammo" question from the firefighters is telling. It DID look and > sound like that. There's a spectacular amount of energy in those little > lithium cells, and it can do unsettling things when it's released all at > once. > > David Roden - Akron, Ohio, USA > EVDL Administrator > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > EVDL Information: > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.evdl.org%2Fhelp%2F&data=02%7C01%7C%7C0ac2946696114272173308d65a0e2a79%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636795414215041255&sdata=1OX8Qxg2aifbfbvfZ%2Fgu1TdZs8Ht%2BIC8dRZ8mDp8e0w%3D&reserved=0 > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > Note: mail sent to "evpost" and "etpost" addresses will not > reach me. To send a private message, please obtain my > email address from the webpage > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.evdl.org%2Fhelp%2F&data=02%7C01%7C%7C0ac2946696114272173308d65a0e2a79%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636795414215041255&sdata=1OX8Qxg2aifbfbvfZ%2Fgu1TdZs8Ht%2BIC8dRZ8mDp8e0w%3D&reserved=0 > . > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > > _______________________________________________ > UNSUBSCRIBE: > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.evdl.org%2Fhelp%2Findex.html%23usub&data=02%7C01%7C%7C0ac2946696114272173308d65a0e2a79%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636795414215041255&sdata=Mb%2F2%2BfphUbKzKXXiLIVWmj0sJu9M22avfcLI0kFnqw8%3D&reserved=0 > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.evdl.org%2Flistinfo.cgi%2Fev-evdl.org&data=02%7C01%7C%7C0ac2946696114272173308d65a0e2a79%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636795414215041255&sdata=Pf2XysGyEazt1qkTdR5SMO%2BZrjUMKZpdVExCkzVhUVo%3D&reserved=0 > Please discuss EV drag racing at NEDRA > (https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgroups.yahoo.com%2Fgroup%2FNEDRA&data=02%7C01%7C%7C0ac2946696114272173308d65a0e2a79%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636795414215041255&sdata=LnLdu6U1L0XcfIh7%2B9fPrh9kek5tV1FWOdt3F1Aq33E%3D&reserved=0) > _______________________________________________ UNSUBSCRIBE: https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.evdl.org%2Fhelp%2Findex.html%23usub&data=02%7C01%7C%7C0ac2946696114272173308d65a0e2a79%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636795414215041255&sdata=Mb%2F2%2BfphUbKzKXXiLIVWmj0sJu9M22avfcLI0kFnqw8%3D&reserved=0 https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.evdl.org%2Flistinfo.cgi%2Fev-evdl.org&data=02%7C01%7C%7C0ac2946696114272173308d65a0e2a79%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636795414215041255&sdata=Pf2XysGyEazt1qkTdR5SMO%2BZrjUMKZpdVExCkzVhUVo%3D&reserved=0 Please discuss EV drag racing at NEDRA (https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgroups.yahoo.com%2Fgroup%2FNEDRA&data=02%7C01%7C%7C0ac2946696114272173308d65a0e2a79%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636795414215041255&sdata=LnLdu6U1L0XcfIh7%2B9fPrh9kek5tV1FWOdt3F1Aq33E%3D&reserved=0) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20181204/b63d0273/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
