Reviving this thread as we're having another very cold stretch here in the Eastern US.
My batteries (SE130 CALBs) are still going, but boy do they sag when it's cold like this. It's annoying. I've been charging when my BMS sensors (atop each cell) are over 0C, which they have generally remained over the past few weeks despite the cold (thankfully my garage generally stays above 0C). But, my follow-up question on all this is if the BMS measurement is good enough. For example, I guess there is resistive heat that gets generated upon charge/discharge/shunting that probably make the sensors read higher than the cells themselves. How much, I don't know. Does anybody have any thoughts, experience on this? We've gotten down to -20C with a HIGH today of only -10C ... yet I'm charging. I didn't really want to do it, but I was dragging so much on the road with low SOC%, I had to, or risk having to really limp home. ----- Dan Gallagher http://www.evalbum.com/3854 -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Cold-Charging-Lithium-Experiences-tp4667675p4673895.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)
