Gen 1 Leaf is rated at 80 kW. Pack is 96s2p. Leaf modules have 4 cells in each (48 modules x 4 cells each=192).
Voltage is 96x 3.65 V=350.4 V 80 kW / 350.4 V = 228.3 amps 228.3 amps / 2 parallel strings = 114 amps per string NEC ampacity (conservative) rating for 1 gauge wire is 110 amps with wire rated for 60 degree C, 130 amps with 75 C rated wire, 150 amps with 90 C rated wire. Insulation type determines the temp ratings. The real answer depends on how much power you need. In your 5p configuration, with uninsulated busbars of the dimensions you report, you could assume 5x 114 amps = 570 amps at the pack output to match how Nissan used the bus bars between modules. You might possibly even go up to 5x 150 amps = 750 amps by using the NEC ampacity at an assumed temp of 90 C, but this risks exposing the battery terminals to too much heat, and would put higher discharge C rates on the battery. 17s modules x 4 cells/module x 3.65 V per cell = 248.2 V pack. 248.2 V x 456 amps = 141 kW available 5p17s modules = 85 modules 85 modules x 0.5 kWh/module (when new) = 42.5 kWh I think you have enough energy for a useful short range truck, and enough power to meet light duty truck needs. On Sat, Aug 1, 2020, 19:45 John Lussmyer via EV <[email protected]> wrote: > I'm trying to figure out what the constant and 30-second Amp ratings are > for some Leaf Busbars. > The ones I have measure 0.78" wide by 0.08" thick. > That calculates out to 40.25 mm2 (yeah, changing units) > 1 awg wire is 42 mm2. > BUT the busbar isn't insulated, and has a much larger surface area, so > won't heat up as much. > 1 awg wire is rated at 0.13 ohms/1000 ft. > > It's about 1.25" between modules in a Leaf pack. > That comes out to 0.00001354 ohms. > at 200A, there should be a voltage drop of 0.0027V, or 0.542 watts. > > What I'm trying to figure out is if I need to stack several of them for > the 5p17s pack we are probably going to do for a friends truck. > > -- > Bobcats and Cougars, oh my! http://john.casadelgato.com/Pets > _______________________________________________ > 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) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20200801/41f003fe/attachment.html> _______________________________________________ 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)
