I recently came across this on the British Battery Vehicle Society: http://www.batteryvehiclesociety.org.uk/forums/viewforum.php?f=53
And a video of the BMS - https://www.youtube.com/watch?v=Wgyg41GIGxU Trying to track down the fellow who made it. 07966 806 727 On 8 March 2017 at 17:24, paul dove via EV <ev@lists.evdl.org> wrote: > Thats good but thermal monitoring is necessary with many chemistries. > Every laptop battery I have every taken apart had thermal sensors on each > cell. > > Sent from my iPhone > > > On Mar 8, 2017, at 10:33 AM, John Lussmyer via EV <ev@lists.evdl.org> > wrote: > > > > On Wed Mar 08 08:08:01 PST 2017 ev@lists.evdl.org said: > >> Would you share what you're doing to build a BMS, what you've learnt > etc? > > > > This is my 5th BMS version. > > I originally had units with little micro computers on them, and all > kinds of nifty digital features. (revs 1 - 3) > > PITA to program, reliable communications difficult, expensive, and was > hard to detect individual unit failures. > > While it was "fun" to watch all the individual voltages on a display, it > wasn't especially USEFUL to do so. > > > > Rev 4 and 5 have gone back to a simple analog system. > > It detect undervoltage, overvoltage, and has up to 200ma of bypass > balancing. > > The only output of the units is a single small LED on each reg (on is > good!), and a single wire output that is daisychained from unit to unit. > > The wire is a current loop, so if ANYTHING goes wrong (unit fails, wire > comes loose, cell goes completely dead, etc..) you loose signal. > > My in-cab indicator is a green LED that is on if all is good, and a > buzzer that goes off if something is wrong. > > I've also hooked up a small relay to shut off the charger if "something > wrong" happens. > > > > > > -- > > > > Worlds only All Electric F-250 truck! http://john.casadelgato.com/ > Electric-Vehicles/1995-Ford-F-250 > > > > _______________________________________________ > > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > > Read EVAngel's EV News at http://evdl.org/evln/ > > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/ > group/NEDRA) > > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/ > group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170308/14e2c804/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
