Monday, November 11, 2013

INITIAL PACK CHARGE

My charger is back (Thanks Mark) and functioning as it was programed to by Zivan. It permits me to adjust the voltage for the end of the CC part of the curve, but on the CV part of the curve, seems to hold the voltage for a brief period, then allows the voltage to start creeping up. The charger seems to be shutting down, based on a predetermined time, that was programmed for 225 ah flooded cell batteries originally used. Turning the current down effects the CC stage of the original charge, as well as the CV phase. The batteries are being drained back down so I can check the bottom balance, then will be charged again and the pots adjusted to charge at 18 amps CC and go into the CV phase around 3.25 volts/cell. This will give me some room when the voltage starts drifting up and should allow me to stay in the CV stage until the charger shuts down.


CHARGING THE PACK

The second option is the programmable chip I purchased awhile back, that will allow me to set the CC and CV levels in the software. This is my last resort as I don't want to smoke the charger again.

Currently I am using 2 flood lights to drain the pack at 2.5 amps, so it is taking a long time to get back down to where I am approaching 2.6 volts. A couple cells were shorted for a couple seconds when I was connecting the pack back up, so I hope I didn't take enough out to effect the balance. Those cells are reading a little less than the ones around them.

The 12 volt system needs hooked up this weekend so I can hook up the heater. That should give me a much better way to drain the pack if I need to do it again. Then all that will need done is to hook up the contactor and motor leads before testing the controller. 
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