techiefan wrote: DaveinOlyWA wrote:
draftman wrote:Nope. I drive 16.5 each way. I fill up at work each day, at home or otherwise only on some weekends.
I have a 24 mile RT commute and only charge to full if planning a 150+ mile drive and then only sometimes. Today I will do about 130 miles. Right now my LEAF is about 60%? I will stop by the QC for a charge and lunch.
Based on past track records, I would avoid higher SOCs at least until we have some baseline user experiences.
2018 LEAF in Question here
I agree that more data is needed but what is the real SOC % to go by, I hear 80% but that's based on previous models with different battery sizes. Why not 90% or 95%, I get 100% is a no-no but as said here but charging to a lower number cuts the distance down and one never knows when they will need to or want to do a spur of the moment trip. Why is 5% not enough breathing room or 10%?
Other pain and my grip right now is having to managing charging as such.
The SOC parameter is not a line in the sand. First off, lets examine the basics.
**Li prefers life at 50% SOC. Obviously this is not convenient when moving electrons is the ONLY state that benefits us. So the SOC swing should have an arc as centered as feasibly possible.
** One of the degrading factors is the effects of voltage on the anode. High voltage apparently degrades the connection reducing its ability to convert which in turn lowers its capacity. This phenomena is slow which benefits us. So the less time at high SOC, the better. Slow might be good but it all adds up.
** Then we have heat. This accelerates any chemical process. So imagine you get home, batts are warm like 100º and you charge to full stopping at an SOC deemed "ok" by the BMS but your charge finishes early and the pack continues to cool so you get up in the morning and batts are now 75º. Is that "safe" SOC still safe?
Finally; Nissan picked a chemistry that is now known as one of the least robust for high SOC tolerance when a little (woefully little) heat is added.
So the synopsis? Its my take that I will not charge to a level more than I expect to need. The small inconvenience of stopping to charge is something I can easily accept over the HUGE inconvenience of a car 5 years from now that barely meets my needs.
The bottom line is really what is your comfort level and your need? Some need a lot of extra range to reduce range anxiety. For me? I spent $50 on LEAF Spy and removed all that.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased
. 29,413 miles. 2018 S40; 15,000 miles, 478 GIDs, 37.0 kwh 109.81 Ahr , SOH 94.61, Hx 120.15
My Blog; http://daveinolywa.blogspot.com
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