cliveb wrote: > I am very pessimistic about recharge times ever getting short enough. > Not because of limitations in battery technology, but because of the > practical limits of how much power you can feed in during recharging. > 200 miles range requires about 50kWh - that's not going to change, > because electric motors are already staggeringly efficient. If you want > to charge 50kWh in, say, 5 minutes, you need to feed in power at 600kW > (assuming 100% efficiency). I can't see how that can ever be viable. >
Agree with your maths. We'd either need to be charging at 10k Volts / 60 A or using plug-in pre-charged supercapacitors as a charging system or something we haven't yet thought of. FWIW based only on its power output the top of the line Tesla battery pack may actually be able to soak around 400-450 KW in short bursts. A charge time of 20 minutes is much more achievable however, and making the cars lighter and giving them less powerful electric motors would make the overall consumption lower requiring smaller power ingest too. It's tricky at the moment but I don't think these will be problems we think about twice in 20 years time. cliveb wrote: > > In that case I'd imagine you probably would agree with something I heard > a long time ago: "oil is too valuable to burn". > Totally! I want clever polymers and ultra light waterproof sheet materials not clouds of black smoke thanks. ------------------------------------------------------------------------ drmatt's Profile: http://forums.slimdevices.com/member.php?userid=59498 View this thread: http://forums.slimdevices.com/showthread.php?t=105775 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
