arnis
Posts: 700
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: Optimum Charging Strategy - 2012 Leaf

Fri Mar 17, 2017 4:28 am

I wouldn't call 2 readings a reasonable sample size :lol:
Also there is actually almost no difference in cell voltage from the moment
charging speed is reduced. Charging speed is reduced as highest
cellpair reaches predefined voltage limit, around 4.1V. This voltage is kept until
the end of the charging cycle. 80% SOC is 4.0V.

Definitely people tend to finish with less than 1/3 charge left.

There is almost no difference between mid nineties and 100%.
As 100% is actually far from 100%. On the absolute scale of things
mid-nineties and 100% is something like 89%SOC and 93%SOC.
There is a reason why Leaf has 24kWh pack and around 22kWh is usable.
Usable capacity of that 24kWh is between 0.4kWh and 22.3kWh.

My phone charges up to 4.4V :lol: That is way closer to absolutely 100%.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

LeftieBiker
Posts: 6303
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Optimum Charging Strategy - 2012 Leaf

Fri Mar 17, 2017 1:43 pm

Definitely people tend to finish with less than 1/3 charge left.


So your claim that those rental Leafs are sitting around with 100% (indicated) SOC is hyperbole? I'd much rather let mine sit at 90% or even 95% indicated SOC than 100%.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

arnis
Posts: 700
Joined: Sat Jan 23, 2016 3:21 pm
Delivery Date: 23 Jul 2014
Leaf Number: 015896
Location: Estonia, Europe

Re: Optimum Charging Strategy - 2012 Leaf

Sat Mar 18, 2017 4:07 am

100% on the instrument cluster is just a number. It is definitely healthy and safe. Like I said, it is actually not 100%, it's
less than 95%.

Last 1-3% take an hour so charging on DC will hardly give actual indicated 100% (though the 100% might be shown
it is not actually 100% indicated, first 3-4% vanish twice as fast).

Can't argue that 90% (indicated) is more healthy than 100% (indicated) - we know that ideal is around 30-50%.
But hassling with it gives nothing meaningful in return. In EU a lot of Leaf owners always charge to 100%.
And, as they have 2-4% degradation per year, Why continue massive discussion about 80-90-95-100% (indicated) charging?
Yes, 80% charge by default would slightly reduce degradation.
Question - is it worth to hassle so much to have 1% less degradation per year? That's 10% per decade.

Or is it worth hassling with 5-15% degradation per year due to hot pack? Decade estimation not possible.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

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