The 40KWH Battery Topic

[DougWantsALeaf]

Any 2018 Leafs lose a capacity bar yet?

[DaveinOlyWA]

Any 2018 Leafs lose a capacity bar yet?

Not very likely. An informal poll I did in August for owners of at least 15 months or more.

Miles; 8500 to 41,000

Ahr; 110 to 106

SOH; 93 to 91

This covered cars in all areas of the WORLD living in all kinds of weather conditions. IOW; we are essentially all the same.

I picked the 15 month time for ownership because it seems like the 90 day adjustments only lasted 18 months (or adjustments) from birth. Now most only check their pack occasionally including some who use LEAF Spy a lot but simply don't notice or record their pack numbers.

I now have 4 other people who are way overdue for their 7th adjustment. FYI; my 6th adjustment (along with others) went up. It is almost as if it took the BMS that long to determine an algorithm for our driving/charging habits? I know not possible... but I no longer consider the :likely" or the "probably" when Nissan is involved...

As for my pack? If Hx wasn't changing daily (has risen 12 days in a row) I would think my LEAF Spy simply stopped working as ahr and SOH hasn't moved in weeks. Up till now, never went more than 5 days without a change and the norm is a change every 2-3 days if not daily.

The high mileage guy is another Washingtonian who is at "around" (numbers move fast for him) 52,000 with stats just below mine (24,600 miles) but he is trading up to a Plus which he will take delivery of this week. He has LEAF Spy but only checks monthly. Guessing his rate of degradation dropped way off after 18 months (from build date) as well but we shall see.

[DougWantsALeaf]

Are 90 day adjustments based on assembly date or set up date? (When they stick the SD card into the car)

[danrjones]

I've only got about 2500 miles on my 2018 and it is already at 93.18%

But the decrease has dramatically slowed now that the weather has cooled down.

My next three month adjustment, if there will be one, will be around Dec 12th.

The 15 months is an interesting idea, but in my case the car sat around on a dealer lot for likely 12 months or more, so does that count?

[nightleaf]

I have a 2018 and do not check that often to see if the rapid drops have decreased... but I am currently at the following:

Kilometers/Miles; 35500/22116

Ahr; 104.6

SOH; 90.61

hoping I do not reach the 80's anytime soon.

[Oilpan4]

I have a 2018 and do not check that often to see if the rapid drops have decreased... but I am currently at the following:

Kilometers/Miles; 35500/22116

Ahr; 104.6

SOH; 90.61

hoping I do not reach the 80's anytime soon.

Crap. And you're in Canada right?

[DougWantsALeaf]

Did cell chemistry change much between 2015 and 2018?

[Oilpan4]

Something changed.
It took almost 4 years for my 2014 battery to hit 90%.

[DaveinOlyWA]

Are 90 day adjustments based on assembly date or set up date? (When they stick the SD card into the car)

Does "anyone" have that data? In my case, it appears its manufacture date since mine was 01/18 and first adjustment happened 04/18

The 15 months is an interesting idea, but in my case the car sat around on a dealer lot for likely 12 months or more, so does that count?

What was your starting SOH? All the cars I have seen came off the lot new between 99.44 and 99.7ish% a very small range.

Did cell chemistry change much between 2015 and 2018?

Several times

Something changed.
It took almost 4 years for my 2014 battery to hit 90%.

Due to the extreme change in LEAF Spy readings, I say a lot has to do with SW changes. But Nissan has continuously changed the chemistry. You can't more than double the size of the pack on essentially the same frame

[Oilpan4]

If the car sat on the dealer lot for a year fully charged, that wouldn't be good for it.