Doomsday wrote:Ok, up front, my leaf wont be here till wednesday. What I do have is 25+ years of electric RC flying experience and countless charging hours of pretty much every battery type. 100% should never hurt your battery unless you are not going to be driving the thing for like a month or two. Even then it depends a lot on the batteries themselves. These cars are mass produced so guess what that means, It means lots and lots of safety features because there is nothing worse than a customers battery exploding.
So without knowing the safety parameters that nissan has set this should be a rule of thumb. You should be able to run your battery down to 0 and fully charge it to 100% without any degradation what so ever and here is why. Nissan had to have set a "limit" on both the 0% and 100% extremes and there should be a nice safety buffer there that prevents damage especially since this is a mass produced car, Overcharging and over discharging can cause explosions. The main damage to batteries is heat since from what I read there is no real thermal management system other than air cooled, then environment temps would play heavily in the degradation of the battery especially during the charging and discharging phases. Extreme cold can damage as well but its usually more about reducing its ability to release that stored energy. Again, not a scientist here just going off my years of experience dealing with batteries. Frankly the thing I see that hurts the leaf the most if the lack of a real thermal control system. Not charging to 100% or running it down to 0. Again we dont how cushioned or how slim the margins are but I would bet heavily on cushioned due to the inherent dangers of lithium going boom in your mass produced device. Just look at the galaxy note 7.
Anyways, just my opinion from brand new used leaf owner.
Since it fits into my use profile, I was glad to read your post.
I have a 2014 Leaf S, 24k miles and 12 bars. I usually drive about 40 miles a day, short errands around town, with a weekly 40 mile round trip freeway run at about 70 mph. When I charge, I charge to 100% overnight, though I don't bother plugging it in if the remaining charge is over 80%. Most times the SOC is down to about 50% when I do plug in, though I do rarely run it down to less than 20%.
II didn't buy this car to baby it, or to abuse it either. I bought it to replace a VW diesel, and with the intent to drive it whenever and wherever I need to, not to be a slave to someone else's idea of optimal battery usage.
Nissan is a big company that is serious about the coming electric car revolution, and would not have marketed a car that can only be optimally utilized by the 'expert' few.