RE: Battery Analysis Spreadsheet

[Steffan Carroll <steffan@usa.net>]

Sorry about the access problem.  I didn't have anyplace else to put it.  It's 60K. I could
email it to anyone who wants it.  You have to register at egroups to get to it
http://www.egroups.com - They need those advertising demographics.  I don't think you'll
get any spam.


SLA = Sealed Lead Acid.

Long does not call their batteries AGM - but that's probably because they have virtually
no internet presence.  ( http://www.asiansources.com/kunglong.co , US Office: San Jose, CA
95153, (408)629-6012 Fax:(408)281-3931 http://www.kunglongbattery.com/ ,
http://www.bestbattery.com/ )
All they have is something the son of one of the owners put up a while back.  They don't
even have email.  But John Wayland dissected one and declared it AGM.

The Long WP22-24NE is a intended for electric vehicles.  Zap uses a Long WP20-12E which is
the JIS 12V 15-18AH standard size.  Long has a 22AH battery of the same size.  The
WP22-24NE is just two of those in the same case,  so instead of being 2 x 2.99" wide
(5.98")  its 5.87".  (7.13" x 5.87" x 6.57", 26.72 lb, 12.147kg ).

The biggest problem with the WP22-24NE is that one can't buy it in less that 500 unit
quantities.  The US Office offered to make an evaluation version for me, but I'm just a
hobbyist.  I don't know what should be evaluated.  The competition is Hawker and Optima,
and I'll give it to Hawker for the drag racing and very fast charging qualities, but at
anything above 30 minute rate - the Long beats Hawker, especially in the C1-C3 discharge
rate. (at least according to their specs).

Can anyone suggest to me what are the important qualities of an EV battery for
distinguishing which is the better battery in the C.5-C3 rates between Optima, Hawker and
Long?

Are there any other manufacturers that come close?

Steffan
Steffan in San Jose,  steffan@usa.net, http://wwp.icq.com/459770
Join the Unofficial Zappy (and other electric scooter) User's Group. (Or another
Unofficial Zapworld User's Group)
http://www.egroups.com/group/zapworlds/info.html


> -----Original Message-----
> From: owner-ev@listproc.sjsu.edu [mailto:owner-ev@listproc.sjsu.edu]On
> Behalf Of David Roden
> Sent: Thursday, December 30, 1999 12:51 PM
> To: 'ev@listproc.sjsu.edu'
> Subject: Re: Battery Analysis Spreadsheet
>
>
> > http://www.egroups.com/docvault/zappy/KLBattery.xls
>
> I tried this and was prompted for a password.
>
> > Note the Long WP22-24NE,  24V 22AH SLA AGM Lead Calcium battery with an
> energy
> > density of 114 wh/L and specific energy of 43 wh/kg.  Nothing else comes
> close.
>
> SLA?  Do you mean SLI (starting, lighting, ignition)?  If it's "Lead
> Calcium," it almost has to be an SLI battery.  If I remember correctly,
> doping with calcium makes an SLI battery use less water, so they can call it
> "maintenance free."  I can't think why they'd use it for an AGM.
>
> Your ICE car's battery is an SLI type. They are designed for high power with
> thinner plates, and will almost always have higher specific energy than deep
> cycle batteries.  But they can't stand more than a dozen or two deep cycles.
>
>
> The EV racers used to use flooded SLIs because they needed the specific
> energy and power more  than the cycle life.  They're cheap, too, so they
> could run a few races, then recycle them.
>
> Or perhaps I'm mistaken about this battery, since I can't get to the
> reference above.
>
>
> David Roden
> Akron OH USA
>
>
>
>