Marco, If you are concerned about battery temp in summer, then you can always Add a fan that pushes air into the box and an exhaust with self-closing flap At a high (warm) point that will let air out when the fan pressurizes the box.
What others have found is that you try to balance the amount of insulation Such that the pack will stay warm enough long enough, but not as much insulation That it will overheat easily, so essentially you need to estimate how much heat You produce charging and driving and then size the insulation value accordingly. If this gives an unrealistic solution then active heating (resistive typically on Shore power only) and possibly active cooling (just blowing ambient air through The box, typically, no A/C for batteries please, we don't need a new EV1. Hope this clarifies, Cor. -----Original Message----- From: EV [mailto:[email protected]] On Behalf Of Marco Gaxiola via EV Sent: Saturday, April 08, 2017 10:49 AM To: Jukka Järvinen Cc: Electric Vehicle Discussion List Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump) Thanks for the reply... its in Norway.. Thanks for the advice. We've been thinking on a heat pump system, but not sure if it worths all the complexity of the system to put in the vehicle considering heat is for sure gonna to be used during winter, but what about summer time? do they use the AC for colling in the summer? Otherwise, just a resistive heating element would be the simplest way to go? Marco Gaxiola energyev.com On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen <[email protected]> wrote: > What do you consider 'a very cold area in north europe"? > > Easy advice for batteries: > Insulation, insulation, insulation. > > :) > > For cabin one can direct charger cooling fan to circulate air over night. > Most important is to keep moist out as people tend to cloth themselves > during beach weather (-10C) and when it's actually cold (-35C and below). > It is pretty unconfortable if cabin is too warm (>+18C). > > -Jukka > > > to 6. huhtikuuta 2017 klo 22.42 Marco Gaxiola via EV > <[email protected]> > kirjoitti: > >> I'm helping a friend to design a conversion battery pack for a >> very cold area in north europe and was wondering if someone here has >> used an electric AC unit as a heat pump, either for heating up and >> comfort of the passengers on board, as well; and most important; to >> keep the battery pack warm enough on blow freezing temperatures. >> >> Marco Gaxiola >> energyev.com >> -------------- next part -------------- An HTML attachment was >> scrubbed... >> URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/ >> attachments/20170406/51844c9c/attachment.htm> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV >> drag racing at NEDRA (http://groups.yahoo.com/ >> group/NEDRA) >> >> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170408/5f4adc27/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ 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 Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
