Yeah. Made my day considerably less interesting though! I'm surprised this is even possible, but they didn't reconnect the in-vehicle HVAC temperature sensor, and also plugged in some wiring harnesses "backwards" or something, resulting in the A/C button inverting (light on means off), and the...
That sounds reasonable. I should have several more cold spells in which to observe this condition occurring at higher SOC's (in the above example it happened at ~45%), and perhaps resulting in both greater cell voltage differences and pack voltage fluctuations.
I expect you're right that...
I'll read up on that; thanks.
Wonder if the pack voltage out of range is sufficient cause for warranty coverage, or if that too needs to be when not under load.
Next weekend when I have more low temps I'll be able to reproduce this issue at a variety of loads, and probably get the pack...
I agree, it seems like more than simply capacity degradation. There's degradation in several cells resulting in such high resistance that the car "fails" to perform a typical and expected function. Then again, the cells are still rather close in voltage under no load.
I understand that's...
I got my car back from the dealer and was able to reproduce the issue once. As I mentioned in the OP, this is reproducible in ambient temperatures of 30°F and lower. It's now warmed back up until next weekend, at which point I'll be able to do more testing and try to raise some DTCs.
Because I...
I get my leaf back tomorrow and have LeafSpy in hand (plus a nifty plotting tool I whipped up in python). I'll share once I've collected and visualized some data.
I was thinking in terms of getting documentation going on their end, per @SageBrush and others' advice.
I'm not sure what the content of such a complaint should be. My inclination is to compile a complete document with evidence and analysis to support my argument, but I'm not a certified Nissan...
Actually, I see that that DC charging behavior is qualitatively similar to the 24kWh curve here (https://support.fastned.nl/hc/en-gb/articles/204784998-Charging-with-a-Nissan-Leaf-e-or-e-NV200). Here the x axis is SOC, but in my plots it was time, so you have to do a little mental math to...
This is also evident in severely diminished DC charging speeds the one time I did a full DC recharge from about 12% to 90% SOC on a 50kW ChargePoint charger. I expected it to hum along at close to 50kW (or whatever the max supported by my 24kWh Leaf) until it got to around 80%, then decrease the...
Thanks for the ongoing discussion all, (though I realize you enjoy this stuff as much as I do)
I love how much more freely I can imagine the dynamics of cell voltage and resistance as a function of temperature, load, and SOC as a result of your collective insight. You might be interested in a...