The 62kWh Battery Topic

watchdoc said:

DaveinOlyWA said:

watchdoc said:

Approaching my 1 year mark. Here are my results so far. Was trying to shove it all into a chart but I couldn't get the dates to adjust the spacing.

LeafSpy results (monthly or 1000 miles)
Date Miles SOH AH HX Notes
1/4/21 400 99.48 175.48 103.25 initial delivery
1/23/21 964 99.42 175.38 106.28
2/9/22 2002 99.32 175.20 111.33
3/13/22 2991 99.11 174.83 112.38
4/22/22 4007 98.86 174.39 111.96
5/14/22 5000 98.65 174.02 112.37
6/11/22 6002 98.38 173.54 112.84
7/14/22 7003 98.03 172.92 112.56
8/6/22 7,999 97.73 172.40 111.61
8/16/22 9,002 97.58 172.13 111.96
9/8/22 10,000 96.53 170.28 112.30 big drop!
9/24/22 11,001 96.39 170.03 113.11
10/21/22 12,028 96.28 169.84 112.12
11/18/22 13,012 96.20 169.70 112.55
12/9/22 14,001 94.90 167.40 114.11 biggest drop!

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Your chart is hard to read but not for the reasons you think. Your car is having its adjustments on the 3, 6, 9 and 12th month starting around the 7th give or take. These adjustments can take several days and you took readings in the middle of two of them giving the impression the daily movements between adjustments are significant when they are not.

If you want to continue monthly monitoring, I would suggest you change to the 15th of the month for a much clearer picture.

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I have been taking readings every 1000 miles so the date of the month is merely coincidental. What would a better format be?

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As mentioned, the 15th of the month. By then, the adjustment will be completed and you will get a better picture how much of a change you see month to month with and w/o the adjustment. You are likely getting an up within the next two adjustments if not both...

Had to go back and check but my two biggest drops were my first one and also my one year anniversary one like yours. Your build date is 12/21 BTW...

Hardly noteworthy anymore. My 2019 S+ just adjusted up again from 92.35% to 92.7%. That puts YoY decline for my S+ from 12/17/2021 to 12/17/2022 at .4% of SoH. Not too bad

My SV+ is at 90.55% SoH vs. 90.68% a year ago. At even more impressive .13% loss. Not too bad either. (It last adjusted in November)

I do generally keep the cars between 30 and 75% SoC except for road trips.

That is encouraging. Glad to see things apparently leveling off for at least some of us near 90%...

-b

Well, I have the evidence now to hopefully get the weak cell problem fixed when I bring it in tomorrow. As I posted previously in this thread, range has been way down for the last several months and getting worse. With the cool weather it threw two DTC codes and went into turtle mode at 15% battery level. Codes are P3180 and P33E6 both traction battery codes. Hopefully this doesn't take too long to get fixed.


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At dealer...fingers crossed for a new pack....as we know it will take a while to go through Nissan's process. Dealer has done a few pack changes...so they are familiar with the process.

Learjet said:

At dealer...fingers crossed for a new pack....as we know it will take a while to go through Nissan's process. Dealer has done a few pack changes...so they are familiar with the process.

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Is this the same dealer too stupid to realize you have a defective cell ?

LOL...no my closer Nissan dealer and the one I purchased the car from has a Leaf (EV) tech on staff again, so they are working it.

I went in with a thumb drive with plenty of pictures and evidence of the issues...and the two active DTC codes stored in the car.

The service writer said Nissan Corp will sometimes send a specialist to look at the diagnoses before authorizing a replacement. The service writer did feel that he had learned the process and how to work with Nissan with this issue with their previous experience...so we'll see.

I asked if they clear the codes can I still drive it while we wait for parts....or he offered they may be able to get me in a rental....TBD.

Cell is really weak now...


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New here with a 2020 SV+ and SOH of 91% and 25K miles. Bought it used with QCs of 300 and L1/L2 of 100 charges in central Texas. This car has seen two harsh summers with higher record temperatures.

I am not sure what effects the SOH to be honest. Does anyone really know?.. here are my views but please chime in to add so we can compile a list:

Factors which may affect the SOH:
- # of QC charges (is it really?). I have seen cars with low QCs with similar SOH
- Mileage??? I have seen cars with higher mileage than mine and better SOH
- SOC levels?? is charging to 100% always really bad ? not that I can tell
- Age of vehicle? yes maybe
- storage at hot temp in a garage? I doubt that is a major issue
- High speed Driving at higher battery temp?

Factors which could help:
-ECO mode usage helps (Nissan states so). not sure why???
-cooler temps overall helps (65- 95F)
-less charging..., helps regardless if QC or not. is that true?
-


what affects your SOH might be a combination of things but truly no one really knows. Each case is different.

Still Like to see others add to this list...

Learjet said:

LOL...no my closer Nissan dealer and the one I purchased the car from has a Leaf (EV) tech on staff again, so they are working it.

I went in with a thumb drive with plenty of pictures and evidence of the issues...and the two active DTC codes stored in the car.

The service writer said Nissan Corp will sometimes send a specialist to look at the diagnoses before authorizing a replacement. The service writer did feel that he had learned the process and how to work with Nissan with this issue with their previous experience...so we'll see.

I asked if they clear the codes can I still drive it while we wait for parts....or he offered they may be able to get me in a rental....TBD.

Cell is really weak now...

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Pack looks great except for that one cell, shame they can't replace that cell and rebalance the pack.

Supposedly the Uber Leaf S+ driver in Indy had a dealer change out a couple bad cells when his pack went on the fritz (after a very long time with the car). It was outside of warranty at 120K miles, so was a pretty expensive repair. (Drivermojo on youtube)

DougWantsALeaf said:

Supposedly the Uber Leaf S+ driver in Indy had a dealer change out a couple bad cells when his pack went on the fritz (after a very long time with the car). It was outside of warranty at 120K miles, so was a pretty expensive repair. (Drivermojo on youtube)

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according to one of his replies on his channel he is up to 160,000 miles....impressive. Nissan repair....not to impressed by his experience.

Nissan has approved the repair, changing out a module / sub-assembly....saying parts should be here next week? Fingers crossed

watchdoc said:

Pack looks great except for that one cell, shame they can't replace that cell and rebalance the pack.

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They can replace and balance although the "balance" part varies widely from decent to poor results but if its higher than the rest, it bodes well in most use cases.

I wonder how Nissan chooses a replacement cell? Do they always use a new cell or do they try to find a used cell that meets their voltage criteria. Maybe they have a wine celler but instead they call it a cell celler.... "Here we have a vintage 2018 module with a full bodied 3.6 voltage and excellent recharge aftertaste.........."

My wife doesn't think I'm funny either.... I'll see myself out

watchdoc said:

I wonder how Nissan chooses a replacement cell? Do they always use a new cell or do they try to find a used cell that meets their voltage criteria. Maybe they have a wine celler but instead they call it a cell celler.... "Here we have a vintage 2018 module with a full bodied 3.6 voltage and excellent recharge aftertaste.........."

My wife doesn't think I'm funny either.... I'll see myself out

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It makes no sense to use a used cell. The cost to replace a cell is large so they would do whatever is necessary to make sure that its only needed once.

What they (and everyone else) lack is a good way to test the cell for durability without tearing the thing apart.

So the ideology, is they use a new cell and degrade it to the level of the pack. This could be the reason why some cells get replaced, some packs get replaced. I will say in the half dozen who have consistently reported their LS stats, that the balancing of the replacement cell is well... weak and it takes many months (some are still in the process after a year) to bring that new cell near the level of the pack.

In my case the "Battery sub assembly B" which I believe is a whole set of cells is being replaced. Part is in and work is in progress...more info to come once I get the car back.

update...car is still at the dealer...replacement battery "sub-assemble" has been installed.....now the hold up is the "special silicon sealant" that is need to seal the battery pack....that should have been on order when this replacement started...oh well. Meanwhile I'm driving my RV puller... a Ram 3500 Cummins dually Diesel around... :roll:

This is where I think Nissan missed the boat...if they would have perfected quick and efficient battery pack repairs...the Leaf may have sold twice the numbers it has....JMHO. Nissan feel free to pay for my advice

Learjet said:

update...car is still at the dealer...replacement battery "sub-assemble" has been installed.....now the hold up is the "special silicon sealant" that is need to seal the battery pack....that should have been on order when this replacement started...oh well. Meanwhile I'm driving my RV puller... a Ram 3500 Cummins dually Diesel around... :roll:

This is where I think Nissan missed the boat...if they would have perfected quick and efficient battery pack repairs...the Leaf may have sold twice the numbers it has....JMHO. Nissan feel free to pay for my advice

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Unlike gassers, service centers felt having spendy parts on hand that were rarely needed wasn't necessary. It is inventory carried that is a load on their cash flow. As a former car guy, I can say I was shocked at how they run feast to famine weekly, paying out thousands in commission (to one person) while holding nothing in reserve. There was also the owner who had no business or industry training who frequently took ALL the available cash every month, leaving not a penny in reserve for emergencies. I found it all to be...well shocking.

In two cases I worked at dealerships owned by former professional athletes and they were the worst.

DaveinOlyWA said:

watchdoc said:

DaveinOlyWA said:

Your chart is hard to read but not for the reasons you think. Your car is having its adjustments on the 3, 6, 9 and 12th month starting around the 7th give or take. These adjustments can take several days and you took readings in the middle of two of them giving the impression the daily movements between adjustments are significant when they are not.

If you want to continue monthly monitoring, I would suggest you change to the 15th of the month for a much clearer picture.

Click to expand...

I have been taking readings every 1000 miles so the date of the month is merely coincidental. What would a better format be?

Click to expand...

As mentioned, the 15th of the month. By then, the adjustment will be completed and you will get a better picture how much of a change you see month to month with and w/o the adjustment. You are likely getting an up within the next two adjustments if not both...

Had to go back and check but my two biggest drops were my first one and also my one year anniversary one like yours. Your build date is 12/21 BTW...

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Took my LeafSpy reading on 1/16, SOH 94.83% so no positive adjustment yet but not bad either.

Just picked up my Leaf after having the module replaced for a weak cell #1. Glad to have it back!!!

We'll see how it balances over time...but you can see below the new module is lower voltage right now. Not sure why the scale is wrong on LeafSpy...that is a first.



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