I suspect you may find that the Volt still uses energy to keep the battery within its desired temperature range, but simply uses battery energy instead of EVSE energy. You should be able to detect that by watching the range after the car sits unplugged or the EVSE is disabled, compared to range after the car sits with the EVSE providing power overnight.
Tesla definitely uses battery energy to keep the batteries in an environmental range. They actually use the battery energy directly and only trigger a recharge cycle when the battery range has dropped 10 miles. In my garage, that would probably be every 2-3 days. I usually drive it every day and notice that it dropped 2-3 miles from the last charge ending range. Mike > On January 25, 2018 at 12:40 PM Cor van de Water via EV <email@example.com> > wrote: > > > Peter, > Storing LiIion batteries is usually not the problem, although it is > recommended for long life to not store them fully charged, especially > not in hot environment. > Damage is done when (fast) charging in cold - the colder, the slower > they need to charge to avoid damage. > Nissan Leaf only has battery warmers, those will only come on when the > car is on or plugged in and below a certain temp (I believe -30) > I don't know about the Volt, it might simply stop maintaining the temp > when the EVSE is disabled, you can find out by simply trying and see if > the > state of charge of the Volt changes when the EVSE is not enabled. > Cor. > > -----Original Message----- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Peter VanDerWal > via EV > Sent: Thursday, January 25, 2018 7:40 AM > To: firstname.lastname@example.org > Cc: e...@vanderwal.us > Subject: [EVDL] LiIon thermal management question (Chevy Volt) > > I've noticed that if I leave my Volt plugged in and the outdoor > temperature gets very high or very low the Volt will occasionally draw > power for 10-15 minutes. I assume this is the thermal management system > working to keep the batteries at their "optimal" temperature. > http://www.vanderwal.us/energy/Volt-ico.png > What I'm wondering is how important is this (if any) to extending the > life span of the batteries? > I'm guessing that when it's cold out, keeping the batteries warm just > improves performance and that it won't hurt the batteries to spend a few > hours at 20 deg F. > However, what happens when it's 90 deg out? > The reason I'm asking is if it's not critical when the car is parked, > I'd like to avoid wasting 1-3 kwh a day. I can always re-enable the > EVSE before driving the car so the batteries will be at their designed > temperature when being discharged. > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20180125/fb2d > 69c2/attachment.html> > _______________________________________________ > 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) > > _______________________________________________ > 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) > _______________________________________________ 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)