Lots of great comments here, thanks for all the great advice! And yes David I understand it is free and not to be taken as legal/verbatim! I guess where the Volt pack is so reliable you can go without an electronic BMS although it sounds like a terrible idea. I suppose one could write a pre-flight checklist like a plane/boat to ensure all systems are checked including some kind of manual BMS check. Everyone that owns an ICE vehicle should check their oil regularly and the there really is no safety to that- by the time the oil light flickers lots of damage is likely already done. A lot of people use low end BMS as the Volt packs are so reliable only to have them ruined by it. Sometimes safety systems actually do more harm than good. Another thing I have noticed is Volt pack fires - has anyone actually seen or heard of a Volt pack catching fire other than from an accident? I can't find one article where a Volt caught fire sitting on a charger or for any cause other those that were in accidents. I think Volt cell pouches likely just expand and die but I'm not willing to test that!
Cheers Dan On Sun, Mar 7, 2021 at 5:21 AM EVDL Administrator via EV <[email protected]> wrote: > On 7 Mar 2021 at 4:06, jerry freedomev via EV wrote: > > > Next the BMSs > > available are not reliable and can double costs so adding them likely > would > > increase danger, not cut it.I've heard of 100s of BMS failures killing > > modules, packs but no Volt Module failures without them. > > Do you know in what commercial products you find lithium batteries without > a > BMS? > > In the cheapest garbage made by dodgy Chinese sweatshops. One infamous > example: the fire-starting hoverboards from a few years back. > > To be fair, though, what Jerry is suggesting here isn't exactly going > without a BMS. He's suggesting that *you* be the BMS. > > That might be fine, except that humans aren't as rigorous about watching > things as dedicated electronics are. We have this annoying human trait of > getting inattentive and lax when nothing goes wrong for a long time. > > That's when you get in trouble. > > Now, I'm not a battery expert. But I think that it might actually MORE > hazardous to manually babysit a reliable lithium battery than one that's > not > so reliable. Three years will go by, maybe 5, and nothing bad will > happen. > The battery will carry on working just about perfectly. Ho hum. You'll > slack off the manual monitoring. And then ... > > EV batteries can supply a lot of power - several times as much as the > electrical system in your home. And they have flammable material inside. > Think about that for a moment. > > Oh, by the way, changing the subject - did y'all know that the EVDL has > (ta- > dah) terms of service? You'll find them here: > > http://evdl.org/pages/tos.html > > One of them states (in summary) that > > => Information posted on the EVDL comes from its subscribers, not from the > EVDL itself; > > => Nobody in the EVDL "management" (which at the moment is just me and I'm > just this guy) monitors or evaluates the posted information; > > => That - who knows? - information posted may be inaccurate, obsolete, > incorrect, and/or dangerous. > > Not that I'm implying anything. :-\ > > As Zeus said to Narcissus, "Watch yourself." > > David Roden, EVDL moderator & general lackey > > To reach me, don't reply to this message; I won't get it. Use my > offlist address here : http://evdl.org/help/index.html#supt > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > It is difficult to get a man to understand something when his > salary depends on his not understanding it. > > -- Upton Sinclair > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/ > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20210307/c11982ab/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
