Re: Battery Analysis Spreadsheet

[David Roden <roden@wksu.org>]

> 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