On 25 Jan 2018 at 15:39, Peter VanDerWal via EV wrote: > I assume this is the thermal management system working to keep the > batteries at their "optimal" temperature ... how important is this (if > any) to extending the life span of the batteries?
I'm far from a lithium expert, but I've read that while lead batteries lose performance at low temperatures, cold can wreck lithiums if you're not careful. As I understand it, they should never be charged when their temperature is below freezing. I think that even discharging them gets risky if they sink too far below 0 deg C. They also degrade faster (have shorter lives) when they get hot while fully charged. They don't seem to like being fully charged at all. The rule of thumb I read years ago for laptop batteries was that you should store them at 50-70% SOC. So I'd guess that thermal management is probably pretty important for your Volt's battery. BTW, welcome back to the EVDL, Peter. It's been years since we've heard from you. Good to know you're OK. David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to "evpost" and "etpost" addresses will not reach me. To send a private message, please obtain my email address from the webpage http://www.evdl.org/help/ . = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
