Hi Victor and All,
--- Victor Tikhonov <[EMAIL PROTECTED]> wrote:
> jerry dycus wrote:
>
> > >
> > > If you only look at life time nothing beats
> NiCd.
> >
> > But lifetime is the big thing!!!
> > They put out higher spec power, much easier,
> > faster, cheaper charger-ing, cheaper to buy, run,
> > takes abuse well, no problem with cold weather and
> > better in hot than the others high tech, LA batts.
> > Other than these the others are okay!!!!
> > What more could you want?
> >
>
> I want 336V 100 Ah pack in my car and make sure it's
> not
> folding in half and even better - not overweight.
And you'll pay for it dearly.
It's the major drawback of most AC systems is the
need for so many costly cells.
Wouldn't it be better to use a system that
doesn't break the bank! Like Sep-Ex and a reasonable
battery voltage, charger, controller.
Or a lighter, more aero car so you didn't need so
much battery pack. An early RX-7 would be a lot
better for you amoung others.
>
> With NiCd it may not be possible. Depends on your
> priority.
Ni-cads have 2.5 times the usable power
density/weight ratio of of YT's so with them you would
go more than 2.5 times as far with ni-cads for the
same weight.
Ni-cads come in other sizes too like 60 ahr if you
don't need 30kw.
They will cost 1/2 of the evercells over an EV's
life.
> If my battery will last 100,000 miles, give neat 300
> miles range
> (LiIon) and twice as light, I'm willing to pay twice
> as much.
Maybe in a couple of years they will but not now.
But if you were stuck with them it would be worse
than ni-cads, you can't claim both sides in the same
debate.
Plus ni-cads are proven over 70 years. There are
50 yr old ni-cads still putting out over spec!!!!
>
> If I invest in NiCd, I'm stuck with it for 27 years
at
> least
> to get full return (unless re-sell). In this time
> many things
> may and will happen.
You could buy used ones. Or move them to a new EV.
And there is a market for used ones if you would ever
need to sell them. I haunt the battery shops waiting
like a vulture for used ones to come in.
A lot of industrial ones have, but their power/
weight ratio isn't good. Waiting for some SAFT
mono-blocks.
BTW, I'd say 20 years on the life of ni-cads in EV
service. My 27 year old units spent most of their life
sitting in a medical machine as UPS backup so were
little used probably until I started abusing them 2
years ago.
>
> Don't get me wrong - NiCd is likely best battery
> available
> now to anyone. Everyone's priorities are different
> though.
True!! Being able to charge them once a week
without harming them is nice too.
jerry dycus
> Victor
>
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