I expect that this means "do not power up the pads when it is not freezing" But it might be good to find more application documentation. Cor.
-----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Peter C. Thompson via EV Sent: Sunday, April 09, 2017 9:11 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump) More research is definitely called for - their notes include this: "Do not use when the temperature is above 0C." :( Cheers, Peter On 4/9/17 8:47 PM, Marco Gaxiola wrote: > Ohh those pads looks nice.. > > Thanks for the advices, Yes, I think cooling the batteries in the > summer time won't be a big problem (compared to the Arizona's / > Sonora's wheater; excessive heat) Since I found the average > temperature there doesn't go avobe 25°C > > my biggest concern was the idea of using the AC as a heat pump, but > you have clarified this, thanks! > > > Marco Gaxiola > > On Sun, Apr 9, 2017 at 8:22 PM, Peter C. Thompson via EV > <ev@lists.evdl.org <mailto:ev@lists.evdl.org>> wrote: > > You can also get heating pads designed for lead-acid batteries - > these tend to be rugged and acid proof. > > Example: > > https://www.amazon.com/dp/B000I8VL16/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=ECZS9XXRJF00&coliid=I1DAV5PWDDSP7T > > <https://www.amazon.com/dp/B000I8VL16/ref=wl_it_dp_o_pC_nS_ttl?_encodi > ng=UTF8&colid=ECZS9XXRJF00&coliid=I1DAV5PWDDSP7T> > > Cheers, Peter > > > On 4/9/17 9:07 AM, ROBERT via EV wrote: > > Why re-invent the wheel. I have some aircraft NICAD > batteries. They have a heating pad in each battery box and a > thermostat. Each battery box has a inlet and outlet for > forced air circulation. Just buy some of these heating pad. > > > ________________________________ > From: EV <ev-boun...@lists.evdl.org > <mailto:ev-boun...@lists.evdl.org>> on behalf of Cor van de > Water via EV <ev@lists.evdl.org <mailto:ev@lists.evdl.org>> > Sent: Saturday, April 8, 2017 6:29 PM > To: Marco Gaxiola; Electric Vehicle Discussion List; Jukka > Järvinen > Subject: Re: [EVDL] Electric compressor for EV+Battery heating > (heat pump) > > 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:ev-boun...@lists.evdl.org > <mailto:ev-boun...@lists.evdl.org>] 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 <http://energyev.com> > > On Thu, Apr 6, 2017 at 12:56 PM, Jukka Järvinen > <akkuju...@akkujukka.fi <mailto:akkuju...@akkujukka.fi>> > 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 > <ev@lists.evdl.org <mailto:ev@lists.evdl.org>> > 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 <http://energyev.com> > -------------- next part -------------- An HTML > attachment was > scrubbed... > URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/ > <http://lists.evdl.org/private.cgi/ev-evdl.org/> > attachments/20170406/51844c9c/attachment.htm> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > <http://www.evdl.org/help/index.html#usub> > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > <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 > > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170408/5f4adc27/attachment.htm>> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > <http://www.evdl.org/help/index.html#usub> > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > <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 > <http://groups.yahoo.com/group/NEDRA>) > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > <http://www.evdl.org/help/index.html#usub> > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > <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 > <http://groups.yahoo.com/group/NEDRA>) > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170409/2f1eddcd/attachment.htm > > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170409/2f1eddcd/attachment.htm>> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > <http://www.evdl.org/help/index.html#usub> > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > <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 > <http://groups.yahoo.com/group/NEDRA>) > > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > <http://www.evdl.org/help/index.html#usub> > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > <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 > <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) _______________________________________________ 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)
