apzelic wrote:Yesterday (6/25/18) we took our 2016 30kw-hr Leaf in for the recall 'software update' (SU) and I will report some limited data below. I did not have time to drain the battery to VLBW and record the voltage on LeafSpy, nor did I do so after the SU update (though I will be doing so; see below), but perhaps the data presented below will be helpful.
Before the SU yesterday -- when the dashboard SOC read 80% and the # of bars was 11/12 as it had been since November 2017 at 6,200 miles -- LeafSpy reported the following data:
- SOH = 80.1%
- Hx = 76.79
- SHVolt = 388
Immediately after the SU the Dashboard read 12/12 bars (that is we 'recovered' back to 12/12 from 11/12 bars) and the following LeafSpy data was obtained
- SOH = 91.6%
- Hx = 76.79
- SHVolt= 378
Why is it that the Hx (the inverse of the ratio of internal battery resistances over time X 100%) has not changed with the update?
The SOH and Hx should track over time as both relate to the battery's degradation over time. The Hx of about 77% indicates that
the battery's internal conductance (reciprocal of resistance) over time has decreased by about 23%. This resulted in more heat
generation while driving and charging versus when the battery was new. Did the engineers at Nissan when designing the update
forget to also modify the Hx along with SOH and restoring the lost bars?
Another data point from up-thread; viewtopic.php?f=4&t=26009&start=50#p530487
Before update was down 2 bars
After update all 12 bars restored