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. 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)
