On Mon, Feb 25, 2019 at 3:00 PM Paul Compton via EV <ev@lists.evdl.org> wrote: > > On Mon, 25 Feb 2019 at 04:40, Jan Steinman via EV <ev@lists.evdl.org> wrote: > > > Supercaps are currently 1-10 farads or so. A farad can supply an amp for a > > second. > > I think you might be a little out of touch on Supercaps. > > I've had a sample Maxwell PC223 8 Farad cap on the shelf for nearly 30 years. > > They've been into the multi 1000F range for years. >
Yes, but the bigger issue is that they unfortunately drop in capacitance as you put them in series. So, you either parallel a whole bunch of them and try to figure out a way to go from 2.5v at thousands of amps up to some useful voltage or you put them in series and watch as the capacitance plummets. I don't really know how they plan to get around this aspect of capacitors. They just aren't that great in series but you need high voltage for a car. It wouldn't be so bad if super caps weren't almost exclusively 2.5 to 2.9v rated. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
