JPWhite wrote:I see you have 7 temp bars, I've had 6 or less all year. Only saw 7 temp bars once last year after driving fast in heat and charging soon after.
I think that 7 temperature bars (= 98.2 degree F. or above) means that your Leaf has a fever. If the fever persists or goes higher, your Leaf is going to have some degree of brain (battery pack) damage. I have never seen 7 bars on my Leaf, it is usually at 5 bars, but spends significant time at 6 bars in the Valley during the summer; my pack appears to be in good shape (around 95-96% on a full charge by Gid-o-meter last I checked). I propose that time spent at 7 bars or above may be a good indication of who is going to have premature aging of the pack (assuming Leaf is not left at high SOC for significant periods of time). This fits well with the information on the Volt chemistry that 90 degrees is a lot worse for the pack (5 year life expectancy if) than 72 degrees (8 year life expectancy). My guess is that higher spikes are even worse, even if few and short-lived.
I agree with this.
My experience is only slightly worse:
7 bars - once after QC.
6 bars common during the day in both spring and summer.
5 bars almost always by morning from night-time garage temperatures in low 60s.
Currently showing a Gid loss of about 5.5% at 100% charge (based upon recent 80% charges).
However I seem somewhat more concerned about gradual loss than you, because I am not confident that the rate of loss is going to slow down before Fall.
I would suggest one additional rule-of-thumb for modest rate of capacity loss: how much time the car spends at 5 bars. Even though right now, before the worse summer heat, the pack returns to 5 bars at night, I suspect my car spends much less time at 5 bars than yours in your coastal home climate.
Of course time at 4 bars each day would be even better.
If above rule proves out, my loss rate may accelerate somewhat when the battery pack rarely gets back to 5 bars (72 F reported).
I have another basic concern that may well have been voiced by others. As the pack capacity shrinks, I will need to charge closer to the "new" 100% more often to do the same trips without charge in-route. This additional stress will tend to cancel the decline in the t^.5 loss rate.