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On 11/24/2013 11:17 PM, David Nelson wrote: > For about $5000 you could get a LiFePO4 pack I would want to buy a pack of 180 or 200 Ah Cells to replace my current pack. (I don't want to be drawing 300+ amps from a 100 Ah cell.) My existing Zivan NG3 gets up to 153 volts, so to use it I'd have to buy 44 cells for the 3.5 vpc limit, but the problem is that my DC/DC won't go above 141 volts so that could be an issue with a nominal voltage of 3.3 vpc = 145 volts. So I'd probably have to upgrade my charger to one that supports a lithium charging curve. I'd also be uncomfortable running a pack without a BMS, especially for a 5 to 10+ thousand investment. Including a new charger and BMS, I'm looking at 10-13K http://www.kta-ev.com/Battery_Pack_Kit_122_CALB180_p/battery-pack-kit-122-calb180p.htm Since I'm not convinced that a Lithium pack will last 6 times longer than my current Lead Acid pack, I'm going to use PbA again and see how it goes the 2nd time around. (I've got 2.75 years of learning under my belt....we'll see if I can extend the life of this pack longer than 3 years...) Jay -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iEYEARECAAYFAlKThoAACgkQSWJjSgPNbM+L8QCgg06TLKX27S0i82ICJwLeIrDU LlgAnjjsfnBzsxkeBApKoEvbeIsEHNzT =T13z -----END PGP SIGNATURE----- _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
