Good point, but the heat does still have to go somewhere, so it should
eventually propagate through the entire battery... assuming that's the
easiest place for it to go.
On Thu, Feb 20, 2020 at 10:41 AM Ken Hohhof <af...@kwisp.com> wrote:
> Heat actually doesn't rise.
>
> Hot air or liquid will rise due to lower density, assuming it is free to
> rise while denser fluids sink. So it might be true in a flooded battery
> but not an AGM battery.
>
> Also not true:
>
> A pint's a pound.
> Ground is ground the world around.
> Lightning never strikes the same place twice.
>
> Can't even trust righty tighty lefty loosey, witness twist ties on stuff
> from China and even some Cat5 cable.
>
>
> -----Original Message-----
> From: AF <af-boun...@af.afmug.com> On Behalf Of Bill Prince
> Sent: Thursday, February 20, 2020 10:09 AM
> To: af@af.afmug.com
> Subject: Re: [AFMUG] Battery heater mat
>
> It probably would depend on the enclosure and/or whether there is
> insulation around the rest of the battery. If the battery has an insulation
> blanket around it, the heat from the heat mat should propagate through the
> entire battery. Heat does rise.
>
>
> bp
> <part15sbs{at}gmail{dot}com>
>
> On 2/20/2020 8:05 AM, Adam Moffett wrote:
> > If you get those heater mats under the battery will you have a
> > temperature gradient where the battery is warmer on the bottom than
> > the top? Will that hurt anything?
> >
> > Suppose the charger has a temperature probe as well. My instinct is
> > to tape it to the same top post as the thermostat probe. I figure the
> > lead post tells me more about the temp inside the battery, and if
> > they're on the same post then the charger and heater are working off
> > the same assumption. Is that reasonable or would you do it differently?
> >
> > I may be at risk of fussing over details that don't matter much, but
> > it's in my nature I guess.
> >
> >
> >
>
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