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zeropointbug -> '5s2p' A123 or '6s2p' A123 pack running 7XL motor (11/23/2006 10:27:01 PM)
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Hi,
I just purchased a Quark Monster 125B (the best) controller and a Feigao 540C-7XL motor for a 1/8 scale, 7.2 lb custom project. Anyways, i am struggling to make a choice whether to use a 5s2p A123 custom pack or a 5s2p custom pack. I am building the pack myself from the developer cells. I know that the 7XL can be a current monster if loaded enough, however 7.2 lbs and 1/8 tires are no match for it.
I have worked out from checking out all over the web at discharge curves and from members like 'EveryDayFlyer' thanks for the graphs, they helped; i figured out that in a high drain application like mine, a 6s2p A123 pack should perform modestly better than a 5s Li-Po pack. That is taking into consideration the discharge vdroop and and nominal voltage, and average discharge voltage.
The 7XL has a peak power output of 1500 watts. THe Quark 125B controller can handle 125 amps cont. and 300 amps peak
Li-Po 5s pack with 4.8 Ah capacity and 18.5 volts Nom, should have a corrected 'continuous' power output of 1600 watts @ 16.75 volts. load (96 amps)
An A123 '6s2p' pack with 4.6Ah capacity and 19.8 volts Nom, should have a corrected 'continuous' power output of 2200 watts @15.9 volts load (138 amps)
'5s2p' pack with 4.6Ah capacity and 16.5 volts Nom, should have a corrected 'continuous' power output of 1800 watts @13.25 volts load (138 amps)
So, if any of you guys have any experience with brushless setups, let me know which setup between the two A123 packs.
And if you have discharge data on the A123 cells that differ from what i could find, PLEASE let me know.
THanks
Zeropointbug
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