cwerdna wrote:I'm thinking of a tests like: steady speed range test w/identical tires and tire pressure until turtle or well below VLBW w/no HVAC usage in dry weather and kWh count of car being charged from turtle to full for the above two cases. Would need to have near identical supply voltages though: no comparing to 208 vs 240 volts charging. Both need to be ~208 or both need to be 240.
One of the issues with the BMS reporting is the point at which LBW and VLBW are turned on relative to the acutal capacity remaining in the pack. We are relying on a calculation that is estimating 4kWh and 2kWh respectively and this may be wrong on some cars.
A range test that notes when these warnings light up adds the dimension of perceived range (which may change with the update) while running well below VLBW perhaps until flat is more related to the battery capacity (which probably won't change with the update).
And how about a simple LeafSpy test before & after, measuring all the key battery parameters, e.g. SOH, Hx, and most importantly Ahrs?
Those three parameters should not change if the "fix" is to just change the thresholds for the bar drop points, right? Hopefully, this "fix"
doesn't fully reset all the battery parameters, e.g. SOH == 95 - 100% after the "fix".
#1 Leaf SL MY 9/13: 74K miles, 48 Ahrs, 5.2 miles/kWh (average), Hx=70, SOH=78, L2 - 100% > 1000, temp < 95F (35C), min discharge (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 115 Ahrs, 5.5 miles/kWh (average), Hx=98, SOH=99, DOD > 25%, temp < 105F