Oops, that link was in another message. here you go: Images: https://plus.google.com/photos/100767276460953028406/albums/5857562724939978177/5943602817868503746?pid=5943602817868503746&oid=100767276460953028406
Alibaba page: http://www.aliexpress.com/store/product/48V-20Ah-LiFePO4-Battery-1000W-BMS-6A-Charger-FOR-E-BIKE-Free-Shipping/328001_821460991.html On Thu, Nov 7, 2013 at 3:07 PM, Michael Ross <[email protected]>wrote: > WIllie2, > > My reply to Mark has a link to the Alibaba page. > > Sorry, I don't have an album. Go to the link and look at the other > pictures there. My EV is an Organic transit ELF. Pedal assist gets me the > upper few mph and improves range. > > I can't find this much battery using 38120 cells, for instance. Just > buying 32 10Ah 38120 cells alone costs $400 to $500, then they want $200 > for shipping. > > The battery sold with the ELF is 10Ah 48V. Not enough for my commute. > There are pictures of this battery exposed in the album also. I think it > is a fine battery, just too small and too many $. Probably better for > production where you have to own up to its performance. > > My 20Ah battery is mine at my own risk and OT rightfully does not want to > hear much about it from me if I have problems. > > We will see how bottom balancing the welded pack goes. I have not got > all I need to do that yet. > > BentMike > > > On Thu, Nov 7, 2013 at 2:52 PM, Willie2 <[email protected]> wrote: > >> On 11/07/2013 12:30 PM, Michael Ross wrote: >> >>> I use about 0.8Ah / mile with nominal 48V pack. Roughly 40W/h/mile >>> averaging 24mph for the 25 mile commute (country 2 lane 80% of distance >>> then urban for the remainder). I charge up at home and at work. I >>> guess I >>> am buying about a kW each time for $0.12. The charger is 60VDC, and >>> shuts >>> off at 56VDC. 56VDC/16 cells = 3.5V per cell. There is a BMS of >>> uncertain >>> function that is supposed to balance the cells. I only have about 1000 >>> miles on it. >>> >>> I just did a teardown and repackage of the cell pack, and it was made of >>> 18650 cells - 96 of them in banks of 6 in parallel, 20Ah in a bank. >>> Interestingly, I can buy this pack with BMS, charger, air shipping for >>> $445. $22.25 / 48V Amp hour. $445 / 96 = $.63 / cell (ignoring the >>> extras). Hard to ignore shipping from China though - it is usually $200 >>> or >>> so. I guess the pack is sort of only $250. >>> >>> Care to name your source? >> >> I didn't find you in EVAlbum. >> >> Is this a two wheeler? >> >> Correct me if I misinterpreted but I make your pack to be about 1kwh? >> The cost seems to be about the same as for prismatic LFP cells but you got >> the BMS, charger and shipping included? Sounds like a great way to go it >> it works. And lasts. >> >> _______________________________________________ >> 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) >> >> > > > -- > Put this question to yourself: should I use everyone else to attain > happiness, or should I help others gain happiness? > *Dalai Lama * > > Tell me what it is you plan to do > WIth your one wild and precious life? > Mary Oliver, "The summer day." > > To invent, you need a good imagination and a pile of junk. > Thomas A. > Edison<http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> > > A public-opinion poll is no substitute for thought. > *Warren Buffet* > > Michael E. Ross > (919) 550-2430 Land > (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google > Phone > (919) 631-1451 Cell > (919) 513-0418 Desk > > [email protected] > <[email protected]> > > > -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do WIth your one wild and precious life? Mary Oliver, "The summer day." To invent, you need a good imagination and a pile of junk. Thomas A. Edison<http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 550-2430 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell (919) 513-0418 Desk [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20131107/2cd98a2f/attachment.htm> _______________________________________________ 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)
