I think the problem happens when the constant current charger doesn't stop when the cells are full. The cell can't store the energy, but it has to go somewhere. They are sealed, so it can't just bubble off water like lead-acid cells do. The energy breaks down the electrolyte and builds pressure until the cell finally blows.
Once full, I don't think it matters how large or small the current is. It will cause damage and it is additive. Mike On April 1, 2015 10:33:42 PM MDT, Jan Steinman via EV <[email protected]> wrote: >> From: Robert Bruninga via EV <[email protected]> >> >> That's 300 mA at 250 VDC. > >The voltage doesn't really matter, does it? > >If you're charging with a constant-current source, all but one of the >cells could short, and the last cell would still see no more than 360 >mW. > >If you were charging constant-voltage, and you had a cell short, then >that would cause the other cells to receive more current, which could >cause them to short, etc. until you burn up the string. But it >shouldn't happen on a correctly-operating constant-current charger, no? > >:::: Jan Steinman, EcoReality Co-op :::: > >_______________________________________________ >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)
