5,000j is 5000 watt/seconds or 6.7 HP for 1 second 100 amp-hour battery at 360 volts is 36KW-Hr or 129,000,000 watt-seconds or joules. To store 36KWhr at 360 volts, you would need 2,000F of capacitor rated at >360volts. When 50% discharged, the voltage would be 254volts.
David Kerzel -----Original Message----- From: EV <ev-boun...@lists.evdl.org> On Behalf Of Jan Steinman via EV Sent: Wednesday, April 15, 2020 11:03 PM To: ev@lists.evdl.org Cc: Jan Steinman <j...@ecoreality.org> Subject: Re: [EVDL] custom battery I think the answer is really quite simple — and very expensive: capacitors! I have a fence charger that charges/discharges six joules every second or so. I have studio strobe lights that can charge/discharge nearly 5,000 joules in under ten seconds. Other than the magnitude of energy that is moved about, these applications are perfectly safe, and no BMS is necessary. So-called super capacitors have come down in price dramatically recently, although they are still a couple orders of magnitude more expensive than batteries. But your application sounds like it needs capacitors, or you may end up paying nearly as much in safety, failure prevention, and battery management. Jan _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
