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 <ev-boun...@lists.evdl.org> on behalf of Cor van de Water via EV
<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] 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 <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>
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
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