dsh wrote:Have 2 questions on this issue with Capacity Loss:
I am understanding correctly we could actually see a Battery Capacity bar being added back on? I.E. have 10 bars, but in winter may see 11 due to cooler weather?
Also, if I am using the 120V trickle charge when charging at my home(Waiting for EcoTality to install the 240V charger, will this damage the batteries?
We don't have acces to the battery degradation data as reported by the car (edit: with the exception of the obvious missing capacity bars at 85%, 78%, 71%, etc). We will when LEAFscan
is released later this year.
There is a heat indexed limit to charging that we can only guess at the particulars. Dave guessed 2-3%
; I've observed almost 10% at over 136F degrees (battery temp) when measuring stored energy via the Gidmeter at a "full" charge. When my battery returned to 70F ambient temperature later that day, it returned to 99% stored energy when fully charged.
Clearly, we don't have detailed data in this area, however it's just not that hard to get. Heating the battery is easy with multiple QC, then measuring the Gid count at set temperatures of the battery at "full" charges. Let the battery cool to 70F, and measure again. It should have returned to its original Gid count.
Please don't directly confuse this "temperature related charging inhibitor protocol" with permanent loss of capacity as reported by the battery capacity gauge. You will not get that back.
keep in mind my estimate is not "climate adjusted." factor in the "Phoenix effect" and it maybe 10%, in fact we can reason as (or create more rumor) by thinking...
now if we flip it a bit. i saw just over 19 KWH stored when my batteries this past winter were in the 30'sº range. so if we take a balance point of sorts to be 70F 35 is well, 35 º away and if 19.5/21.5= 90.6% or a "temporary temperature induced degradation" (or TTID) of 9.4%.
or we can take 105º which is still the same 35º away and then, i could see the TTID of about 10% which is in itself, acceptable and workable.
the problem is cold does not seem to have any lasting damage that i am aware of where heat does. i have always suspected that the AZ people who are reporting 20-25% loss is really only seeing 10-15% permanent loss with the rest being TTID.
so we go back to Nissan's "advisory" warning that passes in absence of a regular warranty of 20% in 5, 30 % in 10 which implies 2% a year after the initial breakin or whatever which means about 12 % in the first year or so. only then do we throw in penalties for OBA (owner battery abuse) whcih then brings us to just about what many Phoenicians are seeing.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 7059.6 mi, 95.35% SOH
My Blog; http://daveinolywa.blogspot.com
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