dhanson865 said:
blimpy said:
I'm assuming I will end up operating my used leaf' in the predicted the 5-10 year capacity region.
say 50 % capacity. Will that mean much lower charge efficiency ( same power in-less power out ) ??? :?: :?: :?:
What do you guys with 50-75K miles see in this respect ?
does the battery become that much less efficient or does it just finish charging faster?
At L2 charging speeds, internal resistance is low enough that there is no measurable difference in charging efficiency. At QC charging speeds, the rise in internal resistance simply means that the car charges slower as it hits the BMS's maximum allowable cell voltages sooner of about 4.1V / cell. But still, internal resistance is low enough that not a significant difference in energy is lost to heat in the pack.
You do lose efficiency due to reduced regen the car allows, though. For example, just after having lost 2 bars, with my pack in the 70-72F range, I only get about 15 kW of regen maximum at 75-80%. When the car was still in it's first year, 25-30 kW was possible.
I really wish that Nissan would loosen up the allowed regen - it's clear that the battery can take more (cell voltages remain well below 4.1V) and the reduction in regen above and below appx 20 mph really makes a difference for me as I live on a 300 ft hill that I descend every day. Unless there is no traffic behind me and I am able keep my speeds down (and thus regen up), I currently lose about half the regen I would otherwise be able to get. For those days when I start off at 100%, I easily lose 10% efficiency on my commute.