GerryAZ wrote: ↑
Wed Oct 09, 2019 8:22 pm
Try to discharge the battery as deeply as you can between charges. Deep discharge will get the other cell voltages closer to the low ones and also extend the charging time so it should help the balancing process.
How do you figure they get closer? That theory doesn't make sense with the data.
If you monitor the cell voltages with the phone app you will see that the difference gets greater as the SOC decreases--the lower cells drop quicker, they fall off the linear slope first and the voltage heads toward the bottom end at a faster rate, whereas the remaining cells are still up on the flat linear slope. So the difference grows greater, not lesser.
If you monitor the cells with the phone app with the car READY but not driving, you will see the balancers cycling on and off. It might be quicker to reach balance by charging and then just turning the car ON and let it sit and balance. Don't know if it balances when the car is OFF like Tesla does.