> On Aug 13, 2014, at 2:20 PM, Danpatgal via EV <[email protected]> wrote: > > I am using 38x130 ah CALBs in my Lectric Leopard and have had a too hot (> > 40C) warning on my BMS come on a few times in the last month or so.
Do you get it when driving? I have the Elithion Pro BMS. My "to hot" warning comes on sometimes when the cells sit in the direct sun. I don't have a cover over them; just plexiglass. corbin > Today, > after a longer stretch of accelerating uphill to home, I checked some of the > battery posts. Measuring with a laser sensor, several of them were around > 33C , in a grouping, maybe 6 or 8 posts adjacent on the most positive side > of my pack. Posts just a few cells more negative were much cooler, maybe > around 26C or cooler. > > I checked the bolts to make sure they were tight, and didn't notice any real > problem with the connections being loose. My only other thought is that > perhaps (as has been discussed in other threads), these connections have > corroded over time ... adding a little resistance layer (I didn't initially > polish or use Noalox on those) that is now finally heating up. I am also > using the original copper straps with steels M8 bolts. > > Are others noticing this kind of heat with the lithium cell terminals? > Aside from just cleaning the terminals and putting on some Noalox, might > there be other things to do? I installed these in Sep. 2012, so they are > not quite two years in service. > > Thanks - Dan > > > > ----- > Dan Gallagher > http://www.evalbum.com/3854 > > -- > View this message in context: > http://electric-vehicle-discussion-list.413529.n4.nabble.com/CALB-bolt-terminals-getting-hot-tp4670981.html > Sent from the Electric Vehicle Discussion List mailing list archive at > Nabble.com. > _______________________________________________ > 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) > _______________________________________________ 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)
