Open kenpoulton opened 4 years ago
Is this the same across all board types? Is that 3V when board is idle or does that include voltage sag as well?
The Pint and XR have the same voltage batteries. V1 and Plus are somewhat lower voltage.
I haven’t been able to test under load because my board has flaky Bluetooth. 3.0 V w/o load is very close to 0%. I think the BMS uses 3 V under load as well - you have very little power when any cell is close to 3 V.
I now think that simply showing a percentage based on the cell with the lowest voltage would accurately reflect the usable battery charge.
Enhancement request: show total capacity and predicted usable capacity.
The board quits when any one cell gets down to 3 V. When there is a cell voltage imbalance, this can happen well above 0% (mine rarely gets all the way down to 10% and has stopped as early as 80%). I have some data on my weak battery pack.
Here is my empirical formula for predicting the Captain Morgan % :
CM = dV/5 - (100-Start)*2 CM = Captain Morgan fail (%) dV = max_cell(mV)-min_cell(%) Start = current_battery(%)
An alternative formulation might be based purely on the current lowest cell voltage, but I don’t have enough data for that.