RegGuheert
Well-known member
Like I said, if your battery is at a lower state-of-charge (and it normally is in the LEAF), it will accept some charge at 13.1V. But the battery will never get fully charged at that voltage.QueenBee said:RegGuheert said:It really doesn't, not to full. (And if it IS putting in ~10W, then the battery is nowhere near full. If the LEAF OEM battery is close to full, the power flow at 13.1V will be significantly less than 1W.) In the case of OP's battery, 13.1V is LOWER than the resting voltage of the fully-charged battery, which was measured to be 13.3V.QueenBee said:Does putting in roughly 10 watts of power at 13.1 volts into the battery really not charge it?
But even in the case of the LEAF OEM battery which has a resting voltage of 12.9V or lower when fully charged, the battery will NOT charge to full at 13.1V. (It will charge up to about 70% or perhaps a bit more if it is below that level.)
I guess it was a big assumption to assume that Nissan's measurement was accurate but my LEAFSpy always reports about 13 volts and flips between just above 1 amp and just below 1 amp.
Here is the plot 69800 provided earlier today, but plotted in Excel with gridlines etc.:
Note that after both the charging and the driving events, the battery voltage, and hence its state-of-charge, is lower or the same as it was before the event. No net charge was added. It was either lost or is the same. That is what happens when you have a full, or mostly full, 12V battery in the LEAF. Once it discharges it to around 60-70%, it can add a little each time and therefore maintain it there. Unfortunately, the lead sulfate is hardening all the while.