Hi Marco and all, You can also use the heat pump for heating/cooling combined with an idea of Lee Hart's. Make a cold/hot plate out of coiled copper tubing that the battery pack sits on. Sandwich the copper coils between an aluminum plate that the Bat pack sits on and an insulating base. And if you really get industrious you can make the walls of the bat pack out of the heating/cooling plate and even the rows separating your batteries.
Rush Dougherty Tucson AZ 85719 > -----Original Message----- > From: EV [mailto:[email protected]] On Behalf Of Marco Gaxiola via EV > Sent: Sunday, April 09, 2017 8:48 PM > To: Peter C. Thompson; Electric Vehicle Discussion List > Subject: Re: [EVDL] Electric compressor for EV+Battery heating (heat pump) > > 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 <[email protected]> > 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 > > > > 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 <[email protected]> on behalf of Cor van de Water > >> via EV <[email protected]> > >> 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:[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) > >> > >> -------------- next part -------------- An HTML attachment was > >> scrubbed... > >> URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/ > >> 20170409/2f1eddcd/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) > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.evdl.org/private.cgi/ev- > evdl.org/attachments/20170409/97a8455c/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)
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