[EVDL] fusewires for 18650 cells
Thou my cells are rather close in capity, I'm still thinkng of using fuse wire as in the telsa pack . If i used the phone cable 2 pair cable that runs around houses and used 3/4 inch form cell to bus bar would my 10 amp cells be protected ? ___ 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)
Re: [EVDL] fusewires for 18650 cells
Best thing would be to just test them and be sure. But don't test with a 3" piece of the wire from end of battery to the other end, because that is not the same as testing a 3/4" piece. You will need a 3" piece of heavy wire and then just the 3/4" of the "fuse" wire to get a valid test. But trivial to do the test. Bob -Original Message- From: EV On Behalf Of ken via EV Sent: Wednesday, January 2, 2019 4:26 PM To: Electric Vehicle Discussion List Cc: ken Subject: [EVDL] fusewires for 18650 cells Thou my cells are rather close in capity, I'm still thinkng of using fuse wire as in the telsa pack . If i used the phone cable 2 pair cable that runs around houses and used 3/4 inch form cell to bus bar would my 10 amp cells be protected ? ___ 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) ___ 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)
Re: [EVDL] fusewires for 18650 cells
Phone wire is not consistent in terms of rating or operation. Having built a 10KW with 1200 cells... I would use proper fuse wire in it. It is cheap to buy and at least you know what the rating is rather than a haphazard experiment. I would also fuse top and bottom and not just the top. Cheers Steve On 02/01/2019 21:55, Robert Bruninga via EV wrote: Best thing would be to just test them and be sure. But don't test with a 3" piece of the wire from end of battery to the other end, because that is not the same as testing a 3/4" piece. You will need a 3" piece of heavy wire and then just the 3/4" of the "fuse" wire to get a valid test. But trivial to do the test. Bob -Original Message- From: EV On Behalf Of ken via EV Sent: Wednesday, January 2, 2019 4:26 PM To: Electric Vehicle Discussion List Cc: ken Subject: [EVDL] fusewires for 18650 cells Thou my cells are rather close in capity, I'm still thinkng of using fuse wire as in the telsa pack . If i used the phone cable 2 pair cable that runs around houses and used 3/4 inch form cell to bus bar would my 10 amp cells be protected ? ___ 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) ___ 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) ___ 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)
Re: [EVDL] fusewires for 18650 cells
ken via EV wrote: Thou my cells are rather close in capity, I'm still thinkng of using fuse wire as in the telsa pack . If i used the phone cable 2 pair cable that runs around houses and used 3/4 inch form cell to bus bar would my 10 amp cells be protected ? As mentioned, phone wire is not of consistent size or quality. As a result, its performace as a "fuse" is likely to be inconsistent. Maybe that's good enough; maybe not. You'll have to test it carefully to be sure. A few background details on fuses might help. A fuse "blows" when the metal reaches its melting temperature. That is a function of current, time, and ambient temperature. Onderdonk's equation provides a ROUGH approximation of the fusing current of a round uninsulated wire in still air. For copper, it is I = 0.148 A/T^0.5, where I = current in amps, A = cross sectional area in mils, and T = seconds. Any insulation on the wire drastically lowers the fusing current. Any airflow around the wire drastically increases the fusing current. Most metals have a high enough melting point that they can set fire to surronding materials. When the fuse opens, there may also be an arc. This is especially dangerous on high voltage DC, because the arc will not self-extinguish until it is very long! That's why commercial fuses are always in some fireproof package. Whatever you do, test, Test, TEST! -- The belief that there is only one truth, and that oneself is in possession of it, is the root of all evil in the world. (Max Born) -- Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com ___ 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)