Nissan issues software update to solve 30 kwh battery issues

[DaveinOlyWA]

It was never Nissan's claim that it cured capacity loss.

Except that what I wrote is "capacity loss problem" - NOT "capacity loss." You can choose to interpret that as "all capacity loss" but that would be silly. Just read it in context.

I think we can all agree the term capacity loss implies permanence which obviously was not the case. At least we are back to where the 24 kwh packs left off where some will do great, some will do good and others should have their heads examined for choosing a LEAF.

But is the car to blame? I know a HUGE fan of the Prius who tried for years to make it work in Phoenix and failed. He now drives a... well something (VW I think) that burns liquid fuel. So its not just Nissan. Cars in general suffer there.

[SageBrush]

At least we are back to where the 24 kwh packs left off where some will do great, some will do good and others should have their heads examined for choosing a LEAF.

You must be kidding.

When > 50% reach 10 years old and have at least 80% of new battery capacity remaining, we can say "some will do good."
For now, I'll guess that 80% are below 80% by year 3.

[DaveinOlyWA]

At least we are back to where the 24 kwh packs left off where some will do great, some will do good and others should have their heads examined for choosing a LEAF.

You must be kidding.

When > 50% reach 10 years old and have at least 80% of new battery capacity remaining, we can say "some will do good."
For now, I'll guess that 80% are below 80% by year 3.

that is where 24 kwh packs left off??

News to me!

[amissionleaf]

amissionleaf wrote:

"just to report that my '17 leaf got a firmware update today (10/8/2018). I don't have any leafspy data but I feel the update added about 15 - 20 miles to the remaining range reading. the longest range I saw in last summer was about 125 miles with a full charge. Today the range is around 105 with a full charge before the update, and showing 102 remaining + 22 driven right after update. The car was built 11/2016 and I got it in march 2017, now has 20250 miles on it."


I got a BAFX bt OBD2 scanner today (10/19/2018)(I should have had it prior to the sw update) and got my first battery stats using the leafspy lite from andriod play store. The data is:

AHr=72.72
SOH=91.50%
Hx=76.22%
4 QC and 820 L1/L2

I have never done the QC, so that must be done by dealer before I had it. is this pack in healthy state? according to the formula from this site: https://flipthefleet.org/2018/30-kwh-ni ... reporting/
SOH_post = 57 + 0.43 x SOH_pre, my SOH prior to the update would be only around 80% and should have lost 1 bar already. the calculated AHr_new = 72.72/0.915 = 79.5 was quite bit small (should be around 82?)

Looks like my pack degrades at a rate of 4.32% per 10,000 miles, that leads to the edge of missing the warranty around 64% of SOH at 100,000 miles

Any comment?

[SageBrush]

Looks like my pack degrades at a rate of 4.32% per 10,000 miles, that leads to the edge of missing the warranty around 64% of SOH at 100,000 miles

Any comment?

Just as Nissan intended, vomit on their collective corporate souls.
HOWEVER, the longer warranty and starting capacity compared to my 24 kWh LEAF is a marked improvement. Enjoy the silver lining, particularly if you bought the car during the fire-sale

[bmw]

My leaf has just under 11,000 miles. It was purchased in 4/17. After the software update on 10/2/18, the SOH according to Leaf Spy pro went from 88% to 94.6%. Now after just over three weeks it is down to 93.4%, and has varied between 95.12% and 93.04%. The HX value has been steadily declining and is now hovering around 80%. The only other change that I have noticed is that the value of SOH does not vary as much with types of driving as he had before the software update.

In this short time it appears to mean that the battery may be continuing to degrade at a similar rate even though the upgrade raised the SOH. I have not seen any change in the GOM estimates or in the actual driving miles. I still get about 110 miles from a 100% charge down to about 20% state of charge. I try not to go below that. As you might guess my driving is pretty conservative. I try to avoid using the brakes as much as possible. I also attempt to keep the car as cool as I can, parking in the shade and putting a sun shade in the front window when I am unable to park in the shade.

I live in St. Louis MO, with summers in the mid 90 degree range. It seems to me that the battery degradation is still rather high for such low mileage.

[goldbrick]

Degradation seems to be sensitive to time as well as mileage so the degradation will probably continue at about this rate regardless of how many miles the car is driven. Keeping it cool and keeping the SOC away from the high and low extremes seems to be about the only thing that can be done to slow the degradation. More driving = more charging so there may be some slight benefit from lower miles but it's probably not much.

[bmw]

I am sorted surprised that there have not been any additional posts describing experience since having the batter software update.

It has been a month and 1/2 since I had the software update was installed on my 2017 Leaf. Other than going from 88% SOH to now around 93% the biggest change that I have noticed is the the SOH reported by Leafspy does not change with the type of driving or charging. For about a month the SOH settled in at 93.33%. In a little over a month it has decreased to 93.08%. It has been amazingly consistent. The other thing that I have noticed is that the Hx value has continued to slowly decline. It is now at 79.5% having been just above 81% after the software update.

I am hoping that battery degradation has slowed but it is two soon tho make any predictions. I would like to hear from more people about their experience.

[joeriv]

Here is my experience to date:

March 2018 before update:
Ahr 73.27 SOH 92.19 Hx 86.09

March 2018 after update:
76.98. 96.86. 86.81

Two weeks after update:
77.22. 97.16. 87.39

Dec 12 2018:
76.59. 96.36. 85.81

I would not get concerned about small differences; after 18 months, my degradation is less than 4%.

[Dooglas]

When > 50% reach 10 years old and have at least 80% of new battery capacity remaining, we can say "some will do good."
For now, I'll guess that 80% are below 80% by year 3.

And that is a guess that has no basis in the real world as far as I know. Next month is 2019. That means a fair number of 30 kwh packs will have been on the road for 3 years quite soon. Okay, 80% below 80% by year 3. Let's check back and see how you did with that projection.