John, Do you have a wiring diagram?
BobK On Dec 16, 2016 3:37 PM, "John Lussmyer via EV" <ev@lists.evdl.org> wrote: > On Fri Dec 16 13:18:55 PST 2016 ev@lists.evdl.org said: > >I really dislike the idea of high voltage BMS wires running all over the > place. > >My plan, if I use LEAF cells, is to make a PCB that attaches directly to > the > >battery terminals that has a microcontroller reading the cell voltages and > >sending the data via an optically isolated serial bus that is daisy > chained from > >one cell to the next. > > Which is pretty much what I have done with my current Leaf BMS. Though > it's analog, no digital communications, and just has a "something is wrong" > signal for the driver. (over or under voltage, broken sense wire, whatever) > The problems I'm seeing with this system are: > A) You have to be REALLY careful laying out the PC board. (I have one > trace too close to the busbar, and if you rotate the board just a tad too > far, it'll fry the reg.) > B) PC boards compress, so keeping the mounting bolt tight is difficult. > C) You MUST mount your modules in a way that always gives you easy access > to that end of the module for easy maintenance. > D) It gets difficult dealing with the power cable connectors mounted to > the same bolt as the regs. > > I'm currently redesigning it to have probably 6 regs per board, and a > short wire harness to the set of modules. Makes it MUCH easier for > maintenance. Also makes it easier to mount the regs where you can see them > easily. > > > -- > > Bobcats and Cougars, oh my! http://john.casadelgato.com/Pets > _______________________________________________ > 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/20161216/5a856455/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)
