Why not use tin plated copper bus bars. This is what we use in our electrical equipment. You can also get plated aluminum bus bars and wire terminals that is normally use in overhead line equipment.
When purchasing bus bars, wire terminals, circuit breakers, circuit breaker panels and switch gear, some times in the larger fittings it, it may have a stamp on it CO-AL meaning that it is approve for for either Copper or Aluminum connections. You can get the plated copper bus bars in long lengths and cut them to size. You will note that the cut ends will show copper. In wet locations, coat these cut ends with silver paint or epoxy silver paint. Go to a local wholesale electrical supply house to see what sources and manufacturers they sell. Some times you may able to buy from them if you list yourself as a Electric Vehicle Research Systems or sometime like that. If you cannot purchase directly from them, find out what electrical contractors deals with this supplier and go to the electrical contractor to pick up a purchase order with all the items and stock numbers listed. Some times these electrical contractors may have varies lengths of these bus bars left over from a job. I plan to use plated copper bus bars when I use Li-Ion cells. Roland ----- Original Message ----- From: Lee Hart via EV<mailto:[email protected]> To: [email protected]<mailto:[email protected]> ; Electric Vehicle Discussion List<mailto:[email protected]> Sent: Sunday, September 21, 2014 11:22 PM Subject: Re: [EVDL] Dissimilar metals on Headyways? via EV wrote: > I might well be fighting a losing battle, but for the price of 4 holes in a strip of material it has been a great education. > > Tonight I tested the different alloys of Al idea. > > Last time, 0.02 x 1.75 in strip of roof flashing aluminum: > ~120 F temperature rise in ~15 seconds, cross sectional area 0.036 in^2 > > Tonight: 0.1 in diameter aluminum welding filler rod > ~30 F temperature rise in ~90 seconds, cross sectional area 0.016 in^2 > > I was rather impressed that< 1/2 the area had ~1/4 the temperature rise! My guess is the welding rod is a more conductive Al alloy than the roof flashing is the big difference. Great to see some actual test results! A quick comment: Pure metals are much more conductive than alloys. Most hardware store structural aluminum is going to be some alloy -- not what you want as an electrical conductor! Look up the conductivity of the various aluminum alloys and you'll see what I mean. Get some PURE aluminum to test. If you have to get it at Home Depot, then buy some aluminum *wire* and spread out the strands to make a flat strip. There are also aluminum solders. They actually work pretty well. You could place a bunch of strands of aluminum wire next to each other to make a flat "bar", wrap a thin piece of aluminum flashing around them to hold them in position, and then solder them together at the ends. Drill a hole in the ends of the bar, and you have a high conductivity (yet somewhat flexible) inter-cell jumper. -- If you would not be forgotten When your body's dead and rotten Then write of great deeds worth the reading Or do these great deeds, worth repeating. -- Ben Franklin, from Poor Richard's Almanac -- Lee Hart's EV projects are at http://www.sunrise-ev.com/LeesEVs.htm<http://www.sunrise-ev.com/LeesEVs.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/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/20140922/b4da8626/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
