I watched the charge cycle this afternoon and it is worse than I thought. The charge cycle is different than what I wrote below.
It was in the 3rd phase and I was seeing almost 140V on the PacTracker with all kinds of error messages that it was overcharging. The charger showed no signs of going to float mode any time soon. I unplugged it and waited about 15 minutes. I plugged it back in. It started up and immediately went back to Phase 3 cooking the batteries again. I can't continue to use this charger. Even if I pull the plug, I can't get it into a float mode. I have to get a new charger that works for 108V and doesn't cook the batteries. So, here it what it is really doing as far as I can tell: Im = 13 Amps constant current until voltage hits U1 which is 128.7V (this is probably true, but I didn't verify) Hold voltage at U1 which is 128.7V until current fades to I2 which is 6.7Amps. (This is also probably true) Current is held constant at I2 which is 6.7 Amps for T3 which I am a little unclear on, but I believe T3 ends when the voltage hits Um which is 132V (seems very high for a 108V pack, but that is what the data sheet says). This is not true. The voltage was way over 132, it was almost 140 when I pulled the plug. Then it floats forever at 119V. I measured and it was exactly 119.4V, so this is true. -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Charge-profile-on-Zivan-NG3-for-108V-US-Battery-125-s-tp4665883p4665889.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ 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)
