[ausev] Trying to determine how good/value the A123 battery systems are

[Brian Lasseter]

On Sat, Jul 5, 2008 at 1:15 PM, Mike Seningen <mseningen at austin.rr.com>
wrote:

>  I found a datasheeet for the A123 Li-Nanotechnology batteries from the
> a123 website.
>
> http://a123systems.textdriven.com/product/pdf/1/ANR26650M1_Datasheet_MARCH_2008.pdf
>
> However I am just not knowledgeable enough to figure out the conversion
> factors to compare them using
> the below calculator.  I pinged around --even found a datasheet for the
> valences -- but looks like no two
> pages have the same units of measure -- and the calculator is different
> beyond them.....
>

Batteries are all different, and they have different characteristics... so
comparing them is never easy.  In your case though, the numbers you need are
on the A123 "Discharge Characteristics graph.  The graph shows a nearly
uniform discharge curve for all 4 of the currents used, that means that the
peukert exponent is darn close to 1, like your other batteries.  However,
since I do not have the numbers used to make the graph, one can only guess
at the actual peukert value... So... I will guess.

Also, since the peukert exponent is close to one, the Ah rating of the
battery would also be the 20 hour Ah rate.  This fills in your chart.
Granted... A123 is selling cells, not packs like the other companies... and
last I checked, A123 was not selling significant quantities of batteries to
anyone.



>
>   Brand Model Voltage 20Ah PeukExp PeukCap Ohms Cycles Weight Price
> Thundersky <http://www.thunder-sky.com/en/battery.htm> TS-IC24v90 24.00 90
> 1.056 54.846 0.00600 2000 52.00 $950.00  Valence <http://www.valence.com>
> U24-XP 12.00 100 1.036 106.195 0.00600 2000 34.00 $1500.00  A123
>  ANR26650M1 3.30
> 2.3
> 1.046
> 2.1
>
>
>
>
>
>
>
>
> 0.010
>
>
>
>
> >1000 0.154
> $18.33
>
>


-- 
TTFN,
Brian "Lasso" Lasseter

· (512)736-1677 · AIM:digininja · ICQ:2238123 · MSN:azoreg ·
"No Sane man will dance." -Cicero (106-43 B.C.)
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