Re: [EVDL] Winter & EVs

--- Rod Hower <[email protected]> wrote:

> I like your 'More Trees, Less Bush' sticker!
> I have a 'Impeach Cheney' hat in my back window.
> Looking at the photos I see three groups of
> Thundersky
> batteries in the back. Is that all of your
> batteries
> and how much do they weigh? what was your range at
> 20C?
> Rod
> --- Nikki Bloomfield <[email protected]>
> wrote:
>
> > I'm really interested in this thread.
> >
> > The City El of course suffers just like any other
> > car in the winter
> > but this year I have some Thundersky lithium Ions
> in
> > her. When I
> > installed the pack I used some thermal 'space
> > blanket' style
> > insulation on each of the three packs ( see
> > http://flickr.com/photos/
> > aminorjourney/sets/72157600628045492/ for
> pictures
> > of the upgrade )
> > but I didn't install heating pads for the cells.
> BIG
> > MISTAKE!
> >
> > Since the average temperature has dropped from the
> > high 20 degrees C
> > down to 15 degrees C my batteries have taken a big
> > hit in performance
> > and the internal resistance has rocketed. The
> first
> > few miles I tend
> > to try and get the batteries as hot as possible so
> > that the car
> > doesn't get too rough a performance. Of course
> also
> > recharging from
> > cold isn't that possible as the batteries won't
> > accept charge so well.
> >
> > So, I'm going to try and install some heating pads
> > this week from RS
> > components. It'll mean removing all of the cells
> fom
> > the car and re-
> > packaging them but at least then I'll have heating
> > for the
> > batteries. The sort of pads I'm getting are here:
> > http://tinyurl.com/
> > 3xu3qw . 30 W of heating per four cells should be
> > enough to keep the
> > cells from getting too cold.
> >
> > I'm also wanting to introduce some form of mains
> > heating for the car
> > as we're about to move house and the garage isn't
> > big enough really
> > to store the City El (it's not long enough as it's
> > just a mini-garage).
> >
> > With those with heating what sort of performance
> > drop do you get in
> > the winter even with heating?
> >
> > Nikki.
> >
> >
> >
> >
> >
> >
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> >
>
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