Larry - You are right. Amp-hours on its own doesn't really mean much at all. Except, of course, that most modern EVs have battery/traction packs in the ~300V bracket and most batteries used in such vehicles have cell voltages in ~3-4V range so, depending on the context, an Ah rating gives the casual observer some idea of the pack/cell energy content. But it is not a terribly precise number/unit to bandy about! kWh is best. MW
On 9 Jul 2014, at 07:17, Larry Gales via EV wrote: > I know that watts = amps * volts, and watt-hours (wh) is a measure of > energy, but over and over again I hear people talking about EV batteries in > terms of amp-hours. What does that mean if you don't know the voltage? > 1000 amp-hr is not impressive if the voltage is, say, 0.00001 volts. Is > there some sort of standard voltage, e.g., 3.6 volts, that is assumed when > one talks about LiON batteries? Does amp-hours tell you something more > than watt-hours? > > Thanks in advance,-- > Larry Gales > _______________________________________________ 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)
