Re: Panasonic

["Lawrence Rhodes" <bassoon@jps.net>]

Thanks for the info Peter but I was under the impression all of their sealed
lead acid batteries were smaller versions of the ones that are used in the
EV1.  I thought if the same technology were used in a simular battery in
weight to the Optimas it would produce twice the amp hours or whatever was
the difference they are to regular lead acid.  I wouldn't mind having some
to put in my Lectra.  Larry Rhodes...
----- Original Message -----
From: PETER VANDERWAL <peterv@peoplepc.com>
To: <ev@listproc.sjsu.edu>
Sent: Saturday, July 29, 2000 4:42 PM
Subject: Re: Panasonic


> > I was on the Panasonic website and there seemed to be a lot of batteries
> in
> > the 2lb to 10lb range that were 6v & 12v.  I'm thinking if they are the
> same
> > design as the EV1's It might be good for Bikes and scooters.  10
12volters
> > would weigh 80lb and put out as many amps as 4 optimas and give one heck
> of
> > a lot more voltage.  Would an A89 take 120v?  Maybe two strings at 60v.
> My
> > Lectra mod would sure weigh a lot less.  Larry Rhodes.....
>
> You are talking about the sealed lead-acid batteries?  I believe those are
> standard Gel Cells.  Not a very good choice for an electric bike even
though
> many people use them for this.  Most are not designed for deep cycle use
and
> seem to wear out quickly.
>
> Also I doubt that an 8lb battery can dish out as many amps as an Optima
that
> weighs 45lbs.  Maybe if they were TMF, but I don't think Panasonic makes
TMF
> batteries yet.  I'm assuming you are talking about the Panasonic
LC-RA1212P?
> The charts on this battery stop at 40 amps which is a long way from the
1200
> amps or so that an optima can dish out.
> Perhaps you meant Amp Hours?  At the 1hr rate the Panasonic can put out a
> bit over 8 AH, compared to the 48 AH an optima can deliver at the 1hour
> rate.  That means it would take 6 of the Panasonic batteries in parallel
to
> provide the same amount of Amp Hours as one Optima, and they would weigh a
> couple pound more than the optima (not counting the cables needed to
connect
> them together).
>
> 120V on an A89?  I doubt it, a K91 maybe but that's pushing it.  The K91
> only costs $85 more than an A89 and it's rated for up to 96V.
>
> 12 of the Panasonic batteries in series could produce 144V at 8 Amps for 1
> hour, or (maybe) 100 amps for about 2 minutes.
>
> If you were to use 10 of them in series parallel, you'd get 60V and 16Ah
> (1hr rate).  If you ran the A89 at it's max continuous power rating (80
> amps) the batteries would be dead in about 9 minutes.  I don't know how
many
> times you could do that before you ruined that batteries but my guess is
> maybe 20-30 times.
>