electricvw
Active member
- Joined
- Jul 30, 2010
- Messages
- 33
How many full charge discharge cycles can you get from the Leaf cells.
Herm, is that until 70% remaining capacity? How do we account for calendar degradation? There are anecdotal reports, which seem to indicate that the LEAF can lose anywhere between 4 to 8% capacity just sitting on a dealer lot after the first 12 months, depending on the local climate of course. TaylorSFguy is at about 80% remaining capacity after 70K miles in the cool PNW. That's between 800 to 900 battery cycles, with his average energy economy, when you assume 21 kWh usable capacity.Herm said:From other examples of the chemistry that Nissan uses (plus some hints from Nissan) probably 1000 full cycles, perhaps 1500 if you are optimistic.
Not surprising.electricvw said:I asked. No response yet.
Based on anecdotal reports from other owners, this seems unlikely even in cool climates like the PNW.electricvw said:I figured about 3000 cycles to 80% or more for the life of the pack to 8 years.
This all depends on your range expectations. If a reduced range will work for you, chances are that you will get good use of the LEAF.electricvw said:Not likely that they would really warranty a pack that will end once the warranty is up. If I had an 8 year warranty I'd expect to get better than 8 years usable vehicle miles.
Good for you, Pete! If you don't mind me asking, what's your approximate geographic location?electricvw said:So far I have a tad over 20,000 miles and have not noticed any real capacity loss.
surfingslovak said:Herm, is that until 70% remaining capacity?
surfingslovak said:TaylorSFguy is at about 80% remaining capacity after 70K miles in the cool PNW. That's between 800 to 900 battery cycles, with his average energy economy, when you assume 21 kWh usable capacity.
OK, when we use the rated capacity, then it's about 700 cycles to 80% original capacity in Seattle.Herm said:Perhaps you should use a base capacity closer to 24kWh, but in any case it will make little difference from your 800-900 calculation. So is he halfway thru the life of the battery or only one third?
surfingslovak said:OK, when we use the rated capacity, then it's about 700 cycles to 80% original capacity in Seattle.Herm said:Perhaps you should use a base capacity closer to 24kWh, but in any case it will make little difference from your 800-900 calculation. So is he halfway thru the life of the battery or only one third?
TaylorSFGuy said:I charge to 100% twice a day and am currently plugging in at dashed lines or close to it depending on the day, wind, weather, my mood etc. I am 13 weeks short of 2 years and the twice a day charging goes to once per weekend average so 11 times a week x 91 weeks and I'm at 1,000 full cycles. As for mileage, Surfingslovak is a tad high, I have 66,000 miles today.
electricvw said:How many full charge discharge cycles can you get from the Leaf cells.
TaylorSFGuy said:I charge to 100% twice a day and am currently plugging in at dashed lines or close to it depending on the day, wind, weather, my mood etc. I am 13 weeks short of 2 years and the twice a day charging goes to once per weekend average so 11 times a week x 91 weeks and I'm at 1,000 full cycles. As for mileage, Surfingslovak is a tad high, I have 66,000 miles today.
jclemens said:This article also goes into low temperature testing which is of interest to me as I am in Canada.
http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/38085/1/04-1055.pdf
I realized that after I posted that my day to day full cycles is not the scientific definition. My commute is almost all freeway with little time in traffic.surfingslovak said:TaylorSFGuy said:That said, looking at your charging history, the 1,000 cycles you are referring to likely cover about 800 cycles relative to 24 kWh. The full rated capacity of is often used as a standard reference for a full charge, which Herm alluded to earlier. Since Nissan does not allow us to access the full pack capacity, any charge cycle we complete, even if it goes from turtle to 100%, is only a partial cycle by definition.
One more thing, I was wondering what your long-term average energy economy might be. I had it pegged at 3.8 m/kWh.
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