LeftieBiker wrote:Sorry about the location thing. The only way to know how well these packs will age is to watch them age, as there were no extremely similar units before 2011. We can say that the early packs are a poor bet to last 10 years, but all we can really say about the 4/2013+ packs is that time seems to be much less a factor than heat.
Stoaty had put together a degradation model (http://www.electricvehiclewiki.com/Batt ... ging_Model
) for the crap '11 and '12 packs. AFAIK, it hasn't been updated for the 4/2013+ build date batteries nor the model year '15 "lizard" batteries (http://www.mynissanleaf.com/viewtopic.php?f=4&t=17168
And, it seems like the 30 kWh packs in the '16 SV and SL (and "S 30") and '17 aren't holding up very well. Either that, or we're seeing defective packs in those.
Leaf only came out in December 2010, so it's pretty difficult to know for improved packs.
The key problem is that Nissan (AFAIK) has never publicly released any temp vs time degradation data for ANY of their batteries. And, we don't know how many revisions of battery chemistries there have been nor when they happened other than the lizard reference.
AFAIK, the closest we know in terms of degradation data from Nissan is http://www.mynissanleaf.com/viewtopic.p ... 78#p230478
and http://www.mynissanleaf.com/viewtopic.p ... 75#p230575
back during the Phoenix degradation fiasco along with a paper at http://www.nec.com/en/global/techrep/jo ... 120112.pdf
published 1/12 referring to a newly developed cell. AESC is the Nissan/NEC joint venture that produces the Leaf's batteries: http://www.eco-aesc-lb.com/en/aboutus/company/
. One can only presume that this or something derived from it got deployed starting 4/2013 or with model year 2015 "lizard" batteries.