Some recent discussion about range has got me thinking about my own. I
have 96V of Exide GC2-H from NAPA auto parts (390 Min @25Amps, 110 Min
@75Amps, 186Ah @20 Amps, 62 Lbs .. or it could be 480 Min @25Amps, 135
Min @75Amps, 226Ah @20 Amps, 65 Lbs). Thats ~1000lbs of lead. Used 5
days per week for at least 13 miles, recharged every night. 288Wh/mile
(form the pack). total weight unmeasured, probably around 3000lbs. I
use an emeter and watch kWh more than voltage for SOC. Typically using
~5kWh for ~13 miles.
I claim a practical and useful range of 20 miles to a DOD of 60% at
35MPH with hills. By practical and useful I mean acceleration that
does not cause accidents/road rage AND without pulling the pack
voltage below 1.75Vpc (84V). I have full stops every mile. I intend
for this pack to last 4 years (it's at 1 year now).
It has been suggested that I should be getting some 60 miles range
with my battery pack. I just dont believe that is feasible. I can
understand that some math models would suggest amazing range, but the
model I used when designing my pack gave me 29 mile range. My car uses
288 Wh/mile. On good days I could probably push it another 9 miles.
What are some real historical experiences with 4 year packs? Could I
push it harder? My worry is that at higher DOD, the voltage drops
quickly under load (high internal resistance?) and I cant get much
current (like 150A@84V, that's getting to be golf cart acceleration
for me)
-Jon Glauser
http://jonglauser.blogspot.comhttp://www.evalbum.com/555_______________________________________________
General EVDL support:
http://evdl.org/help/Usage guidelines:
http://evdl.org/help/index.html#convArchives:
http://evdl.org/archive/Subscription options:
http://lists.sjsu.edu/mailman/listinfo/ev
