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Re: Helping the batteries perfom in the cold.
- Subject: Re: Helping the batteries perfom in the cold.
- From: darrylmcmahon igs net
- Date: Sun, 3 Jan 1999 11:21:34 -0500
- In-reply-to: <003b01be36b0$9036b140$e0f0accf@Maximum.ultranet.com>
- Sender: owner-elec-trak cosmos5 phy tufts edu
> To help my E15 work well out there in the cold, does it not make sense to
> keep the thing as warm as toast (ok, say, 65 degrees F) before I put it
> I imagine that those big bad batteries have huge heat capacity, (I mean,
> specific heat of lead is high) and that they will cool very slowly if
> come out of the garage at 65. (ANd operation is exothermic; they give off
> some heat as they work, yes?)
Yes, charging and discharging are both exothermic. It is not
keep the whole tractor warm, just the batteries. The motors would
rather be cold. Look into getting an automotive battery blanket
(usually 50 or 80 watts heating elements). Put one under the front
batteries and one between the rear batteries. Putting a thin sheet
of styrofoam over the batteries (in place of those black plastic
battery covers) should also make a big difference in terms of heat
retention. I use this arrangement in my electric car, and it works
well in temperatures to -35 degrees. Batteries have remained at
+70 degrees F with no difficulties.
> One would, in an unheated garage, want to be very careful about
> ventilation especailly during charging, of course.
Unless you have an airtight garage (unlikely in my experience) and an
open ignition source beside and above the batteries, I would not be
Darryl McMahon 48 Tarquin Crescent,
It's your planet. Nepean, Ontario K2H 8J8
If you won't look Voice: (613)828-0805
after it, who will? Fax: (613)828-3199