Martin, Delivering 300A at 120V is 36,000 Watts, so losing 350W in the wiring and terminal connections means only 1% loss in the grand scheme of things. A single traffic light turning red in front of you so you have to stop and again accelerate up to speed is likely a bigger difference in the efficiency of a trip...
Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: cwa...@proxim.com Private: http://www.cvandewater.info Skype: cor_van_de_water Tel: +1 408 383 7626 -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lee Hart via EV Sent: Tuesday, August 19, 2014 9:08 AM To: Martin WINLOW; Electric Vehicle Discussion List Subject: Re: [EVDL] CALB bolt terminals getting hot - Cor van de Water via EV wrote: >> Depends on your current. Typically I would say in the order of >> magnitude of 0.1 mOhm (milliOhm) because a 300A current will then >> give 30mV drop, which produces 300A x 0.03V = 9 Watt of power loss >> as heat. Martin WINLOW via EV wrote: > At EVERY connection? In a 120V lithium pack that 's 38 x 9 = > nearly 350W of heat! No; Cor has it right. And, 0.1 milliohms is a *good* connection. You will discover that it is damnably difficult to make a connection that good with aluminum terminals! -- You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete. -- R. Buckminster Fuller -- Lee Hart's EV projects are at http://www.sunrise-ev.com/LeesEVs.htm _______________________________________________ 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)
