On 18 Jun 2013 at 8:25, Cruisin wrote: > ... 32kw battery pack using 8k Panasonic 18650 Li-ion cells ...
Wait. Really? Eight thousand cells??? Yikes! No wonder it took 2 years to assemble! Let's see ... batteryspace.com has a generic 18650; in quantities of 100 or more it's $4.46 each. Eight thousand of those would cost $35,680. Even their cheapest Chinese-made cell - definitely not a Panasonic - is $4.05 each for a total of $32,400. Yeow! Uhm, the capacity doesn't add up, either. Those cheap cells are rated 2.2ah at 3.7v, or 8.14Wh per cell, which almost certainly has to be less than top quality Panasonics. At 8000 cells, though, that would be a total capacity of 65kWh, over twice what you quoted. Unless you really do mean that your battery delivered 32kW (power) and not 32kWh (capacity). (The casual interchange of kW and kWh units among EV hobbyists makes me crazy.) But even then ... again those cheap cells are rated for a maximum power of 15.9W each; 8000 of them would deliver over 127kW, so that can't be right either. I must have misunderstood you. Maybe 8k cells doesn't mean 8000 cells? Maybe that's a type number or something? Help me out here. David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to "evpost" and "etpost" addresses will not reach me. To send a private message, please obtain my email address from the webpage http://www.evdl.org/help/ . = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ 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)
