Amps add in parallel, volts add in series. Given your assumptions, you can put 45 of those 40Ah cells can produce 3.2v at 3600A if you arrange them in parallel, but 80 A at 144V if you arrange them in series. But you can't have your cake and eat it too and get 3600A at 144V...
On Thu, Jul 24, 2014 at 5:37 PM, Ben Goren via EV <[email protected]> wrote: > On Jul 22, 2014, at 8:21 AM, EVDL Administrator via EV <[email protected]> > wrote: > >> For example, the CALB 40ah cells I mentioned are rated for a maximum >> discharge of 2C (80 amps). At 144v, 80a is 11.5kW. Allowing for losses, >> that's only about 12hp from your motor! > > I think I may be a bit confused. > > If a single 40 Ah cell can provide 80 A (for a little while), shouldn't 45 of > those 40 Ah cells be able to provide 80 A * 45 = 3600 A? That 80 A would be > at 3.2 V for 256 W. All 45 cells would be at 144 V, for 518.4 kW or ~ 500 hp. > That's three times the power of the 260 Windsor engine in the car today, and > substantially more than you're going to get in a stock muscle car of any era > -- and waaaaay more than even a pair of AC-50s or WarP 9s is rated for. > > So...does discharge scale with the number of batteries, or is it limited by > the discharge of a single cell? If the former, I should be more than fine > with a 45-cell pack of CALB 40 Ah batteries or equivalent. If the > latter...I'm likely screwed.... > > Thanks, > > b& > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: signature.asc > Type: application/pgp-signature > Size: 801 bytes > Desc: Message signed with OpenPGP using GPGMail > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140724/f9e034e8/attachment.pgp> > _______________________________________________ > 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) > _______________________________________________ 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)
