stutech wrote:From what I can tell though my battery cools back down before I get to the next charger on the plus model with 50kw charging. My average speeds have been 65-70mph and the ambient temp was 60-80F. I would love to see how it does at 100kw charging with even warmer temps to get a true assessment.
It might be advisable to use LeadSpy to monitor your battery temperature after a QC or when driving at speeds greater than 55 mph.
The thermal time constant of the Leaf's battery to ambient is fairly lengthy, greater than an hour for a temp delta of 20 degrees,
i.e. the Leaf battery's thermal resistance to ambient is high. When charging or driving at the speed noted, the battery heats up
quickly, 10 - 15 minutes for a temp delta increase of 20 degrees, i.e. the Leaf's battery heats quickly the result of the battery's I^2 X R
losses from high QC rates or heavy motor loads. The high thermal resistance to ambient also results in a lengthy cool down time for
the Leaf battery.
Last edited by lorenfb
on Tue May 07, 2019 8:35 am, edited 1 time in total.
#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