The 40KWH Battery Topic

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Hello guys,
I'm new here, working on a project involving a 40 kWh battery. We have opened the pack and separated all modules, however, looking at the busbar configurations something doesn't add up. The way the modules are connected in series does not seem to follow any of the two schematics I've found online.

This one, I think is from the 2011 Leaf:
i1wejlp.jpg


But someone also posted this one:
lzpGDQC.jpg


However, after analyzing the circuit, I'm very confident, this is the actual path for the 2018 40kWh pack:
7fg1fjq.jpg


Does anyone have some additional info or can confirm my findings?
 
I sold my Leaf on Saturday, but I did get one more Leafspy reading a day or so before I sold it. Here was my final reading:

SOH: 85.34%
AHr: 98.52
Hx: 97.44
Odo: 15,317
QC: 21
L1/L2: 736


I have 3 plus years of data all in an excel sheet, so if someone wants the data, let me know and I can probably email it to you.
 
danrjones said:
I have 3 plus years of data all in an excel sheet, so if someone wants the data, let me know and I can probably email it to you.
Forget the data: why did you sell such a low-mileage vehicle after only 3 years?
 
Stanton said:
danrjones said:
I have 3 plus years of data all in an excel sheet, so if someone wants the data, let me know and I can probably email it to you.
Forget the data: why did you sell such a low-mileage vehicle after only 3 years?

The chicken knows: to get to the other side.
 
Calculated decision.

I had always planned to trade it in for something with longer range. "150" miles where I live basically made it useless for anything except around town driving. I hike quite a bit and want to be able to use an EV. The leaf couldn't.

We started with the Leaf as a test to see if we liked an EV, and because it was cheap at the time. But now it was getting close to loosing a battery bar, CHAdeMO is dead, the battery isnt cooled - and used car prices are up.

Therefore i sold with probably the best price I would ever get.
 
Update on my 2019 Leaf S

Date SOH Ahr Hx Odo # L1/L2
3/8/2019 99.39% 114.74 104.14% 649 24
4/7/2019 99.06% 114.35 110.42 1606 56
5/8/2019 97.84% 112.95 113.36 2698 91
10/3/2019 96.12% 110.96 109.28 7177 256
3/8/2021 91.80% 105.97 94.66 12700 481
9/17/2022 90.72% 104.73 79.99 17381 694

I drive it like a normal car, fill it to 100%, let it sit at 100% and not worry about it. Usually don't go under 30% battery.
 
DougWantsALeaf said:
Our 62 S+/SV+ have very similar SoH and mileage. Makes me think all this fuss around keep battery between 40 and 70% SoH doesn't do anything.
The longer I have this car the greater the belief that Nissan baked the degradation curve into their software.
 
rogersleaf said:
rogersleaf said:
rogersleaf said:
Turning 55,000 miles. Slight decline

LS stats:
AHr... 103.38
SOH... 89.55%
Hx... 101.59%
SOC... 98.2% and 449 GID
403.42v, cells balanced between 4.201-4.204v
odo... 54,956
33 QC / 1346 L2’s

Reached the 3-year anniversary and 60,000 miles.

LS stats:
AHr... 103.21
SOH... 89.41%
Hx... 104.43%
SOC... 98.4% and 449 GID
409.90v, cells balanced between 4.195-4.199v
odo... 60,226
41 QC / 1477 L2’s
Past 65,000 miles.
Nothing spectacular happening...

LS stats:
AHr... 102.97
SOH... 89.20%
Hx... 95.94%
SOC... 96.9% and 441 GID
402.47v, cells balanced between 4.191-4.194v
odo... 65,114
43 QC / 1626 L2’s
70,000 mile figures:

LS stats:
AHr... 100.87
SOH... 87.38%
Hx... 88.86%
SOC... 96.7% and 431 GID
403.54v cells balanced between 4..202 and 4.205v
odo... 70,687
43 QC / 1771 L2’s
 
Hello friends. I have finally received my 2018 Nissan Leaf car, which I have been waiting for months, as second hand. I was able to get the 40 Kw model. I'm sending you an attached image of the battery health. Could you please evaluate it for me? I hope it is in good condition because I will never be able to replace it or have it repaired. Best regards from Cyprus

 
You'll be happy to hear that the battery is in very good condition. The remaining capacity (SOH) is about 89%, the cells are well balanced, and there are no bad or weak cells. Enjoy your Leaf.
 
LeftieBiker said:
You'll be happy to hear that the battery is in very good condition. The remaining capacity (SOH) is about 89%, the cells are well balanced, and there are no bad or weak cells. Enjoy your Leaf.


I am really happy that you let me know this news. Thank you very much for your time
 
Here's my 4 year battery health status. This was fully charged and no longer charging so it's notable that LSPro indicates 97.5% SOC. Also I do a lot of 30min-2hr charge sessions when I am home between jobs during the day so that is why I have so many charge sessions.

Vuz4Y38.jpg
 
We sold our 2018 LEAF this past weekend.

The final readings from LEAF Spy 10/24/22 are interesting:
AHr=103.33
SOH=89.51%
odo=31,753 miles.

We lost 1.4% in the 2-1/2 years we owned this car:
6/10/20

AHr=104.93
SOH=90.90%
HX=95.33%
odo=25,628 miles
 
My wife finally managed to torture her Leaf into losing a bar, though it still shows all of them for some reason. Either that or my memory is bad, I thought the first bar dropped after 85% SoH? Yes, her dash is that dirty. I thought mine was bad. :lol:

aGJByW0.png


7Cug9sE.png
 
knightmb said:
My wife finally managed to torture her Leaf into losing a bar, though it still shows all of them for some reason.

Why do you say a bar was dropped, if all bars still show on the display ?
 
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