SageBrush wrote: DaveinOlyWA wrote:
johnlocke wrote:We now have reports of at least 4 cars with 4 bar losses. Per the Nissan Help Desk, third bar drops at 70% and the Fourth bar drops at 63% Two owners report that the fourth bar loss was around 60% Now at least we have some concrete evidence of when to expect a replacement battery. The 60% number isn't particularly exciting since that equals 18 KWH capacity. For me, that works out to 64 miles total and I drive 55 miles round trip every day. Doesn't leave much margin for error or extra errands. On the bright side, Nissan also confirmed that the original 100,000 mi/8 year warranty would still cover a replacement battery. That means that it's possible to have the battery replaced several times under the warranty.
numbers based on Nissan BMS as we already know have a wide variance due to likely calibration issues. Since each pack should drop bars at about the same SOC, this is a good example of the error caused partially by charging/driving habits, unbalanced cells and a BMS that has simply lost count...
Some variation, but at least for the 24 kWh models the bar drops for ~ 2 SD of the reports are within an Ahr of each other.
battery numbers for 24 kwh packs showed the same volatility which we all know is simply not really possible so any similarity in the numbers when the bars dropped only meant packs that were equal in balance and calibration. But if you look at enough you will see several incidences when that did not happen.
Just search for "When does the last..." or "Why hasn't my 4th bar dropped?" etc for those who lost bars at lower than the norm. Were they persecuted. made to wait longer than the rest? Or simply was the BMS simply on holiday? I am betting on the latter.
Remember we did at least one incidence of someone who lost their 4th bar, took it to the dealership and it failed the degradation test. Even stranger was the fact that the test somehow restored his 4th bar. So he had to take the LEAF back home, drive it for a bit more until the bar disappeared again...
So yeah, the numbers are at best guidelines due to the VERY wide tolerance the BMS seems to be using.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 (build 10/2016)"low water marks" 24,261.3 miles.363 GIDAhr 80.66Hx95.95%kwh28.1QCs205,L2's 226
My Blog; http://daveinolywa.blogspot.com
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