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... 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