The 40KWH Battery Topic

My Nissan Leaf Forum

Help Support My Nissan Leaf Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
rogersleaf said:
rogersleaf said:
rogersleaf said:
Passing 45,000 miles now... Almost no change since the last reading (SOH actually went up slightly, gained a GID)

LS stats:
AHr... 104.83
SOH... 90.81%
Hx... 105.52%
SOC... 97.0% and 449 GID
403.89v, cells balanced between 4.206-4.209v
odo... 45,159
25 QC / 1124 L2’s
Turning 50,000 miles. Battery looks very stable over the past 10K miles

LS stats:
AHr... 104.51
SOH... 90.53%
Hx... 100.03%
SOC... 98.5% and 455 GID
403.90v, cells balanced between 4.206-4.209v
odo... 50,110
27 QC / 1230 L2’s
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.
I held this back a couple weeks while the dealer did some diagnostic testing during their annual check.
In early Feb '22, experienced a sudden drop in SOC while battery was relatively cold and SOC was @ 25%.
They were not able to reproduce the problem (despite cold soaking the car for 2 days @ 20F).
They did fix the "click" in the front axle by performing the Service Bulletin for dry hub/axle splines and retorque the axle nuts.

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
 
rogersleaf said:
Reached the 3-year anniversary and 60,000 miles.
I held this back a couple weeks while the dealer did some diagnostic testing during their annual check.
In early Feb '22, experienced a sudden drop in SOC while battery was relatively cold and SOC was @ 25%.
They were not able to reproduce the problem (despite cold soaking the car for 2 days @ 20F).
Would like to know what "relatively cold" is, as definitely means different things to different parts of the country.
Otherwise I'd say your stats look pretty good for a pack with 60k miles on it. I think we have to acknowledge the fact that all battery packs are susceptible to an isolated "power drain" at low SoC...depending on the exact circumstances (and it would be interesting to know what those were as well--besides temperature).
 
Stanton said:
rogersleaf said:
Reached the 3-year anniversary and 60,000 miles.
I held this back a couple weeks while the dealer did some diagnostic testing during their annual check.
In early Feb '22, experienced a sudden drop in SOC while battery was relatively cold and SOC was @ 25%.
They were not able to reproduce the problem (despite cold soaking the car for 2 days @ 20F).
Would like to know what "relatively cold" is, as definitely means different things to different parts of the country.
Otherwise I'd say your stats look pretty good for a pack with 60k miles on it. I think we have to acknowledge the fact that all battery packs are susceptible to an isolated "power drain" at low SoC...depending on the exact circumstances (and it would be interesting to know what those were as well--besides temperature).
At the time of the incident, I did not have leafspy running so don’t know cell temps exactly. I’m speculating likely in the low 30’s F based on the dashboard temp gauge reading 3 bars. The car had been parked outside and cold-soaked in 15-20F weather for @ 30 hours. Then driven at 65 mph expressway speeds in 20F weather at night into blowing snow & headwinds for about 25 minutes when SOC suddenly dropped from 25% to to flashing “—-“ in about 2 miles. Up to the time of the incident there was a normal consumption rate for the temp & weather conditions (~25 miles and 30% SOC consumed, typical for a 40KWh pack under Ohio winter conditions at expressway speeds). Then a SOC drop so sudden I couldn’t clear the low battery alarm fast enough before the next alarm chimed. Exiting the expressway and pegging the regen as hard as possible reset the SOC to @ 9% and the car behaved normally on surface streets the last few miles to reach home. Relatively obvious this car doesn’t like heavy power draw on a cold pack at lower SOC’s. Just another good argument for not buying an EV without an active thermal management system.
 
danrjones said:
I haven't updated since Jan 11th. Looks like I must have had an "adjustment" sometime the last week or two, and I (think) I am perilously close to loosing my first battery bar.

For REF on Mar 1st I was at at SOH 87.40

Yesterday:

SOH: 86.00
AmpHr: 99.28
Hx: 94.64
Miles: 13577

My stats as of yesterday:

SOH: 85.97%
AHr: 99.24
Hx:94.49
Miles: 13800


So when should I expect to loose the first battery bar? I must be getting close.
 
Nobody has an idea as to when you loose your first battery bar?

I thought it was supposed to be at 7.5% plus 7.5%, so 15% down?

What was it for the older packs?
 
There was no hard figure for the 24kwh packs (it was between 84% and 85%), and the 40kwh packs seem to be holding on to 12 bars a bit longer than that. My guess is that a bar will drop when it hits 83%.
 
LeftieBiker said:
There was no hard figure for the 24kwh packs (it was between 84% and 85%), and the 40kwh packs seem to be holding on to 12 bars a bit longer than that. My guess is that a bar will drop when it hits 83%.

No worries, I'm not holding anyone here accountable, but I am trying to decide whether to sell it now or if it can get me through the summer w/o dropping that precious first bar. Sadly one of my local rebates ($4k) has run out until October, so I'd prefer to hold onto the Leaf until closer to that time.

Certainly is cheaper to drive the leaf than my f150. Free power versus $5.50 gas at 17 mpg.

I'm at just under 86% and its even possible my next 3 month will be a bump up not down. Maybe.
 
danrjones said:
I'm at just under 86% and its even possible my next 3 month will be a bump up not down. Maybe.
Not a chance in the summer. Having said that, I don't see how 11 is so much worse than 12 (CB's)...especially if they do some sort of CAN bus reading (which they should unless they are clueless about EVs).
 
Stanton said:
danrjones said:
I'm at just under 86% and its even possible my next 3 month will be a bump up not down. Maybe.
Not a chance in the summer. Having said that, I don't see how 11 is so much worse than 12 (CB's)...especially if they do some sort of CAN bus reading (which they should unless they are clueless about EVs).

Given where I live I doubt I'll sell it to a private party. It will likely be sold to carmax or one of the online services. Or a trade in. I doubt most of those will do more than check the battery bar page, if they even do that.
 
I would like to confirm a couple aspects of your 2018 MY: What is they typical climate and how hot / humid does it get? Have you QC'd a large number or just L2 charged it? I noticed the low number of miles (as compared to others out there). For comparison, my 2018 MY are in NC, both with about 24,000 miles, and both show nearly identical SOH of around 90 pct, after both being in service for 3 and 3.5 years respectively. Both also were QC'd over 250 times in that period in both hot and cold temps (NCTC station was a few min away!)

danrjones said:
danrjones said:
I haven't updated since Jan 11th. Looks like I must have had an "adjustment" sometime the last week or two, and I (think) I am perilously close to loosing my first battery bar.

For REF on Mar 1st I was at at SOH 87.40

Yesterday:

SOH: 86.00
AmpHr: 99.28
Hx: 94.64
Miles: 13577

My stats as of yesterday:

SOH: 85.97%
AHr: 99.24
Hx:94.49
Miles: 13800


So when should I expect to loose the first battery bar? I must be getting close.
 
jdcbomb said:
I would like to confirm a couple aspects of your 2018 MY: What is they typical climate and how hot / humid does it get? Have you QC'd a large number or just L2 charged it? I noticed the low number of miles (as compared to others out there). For comparison, my 2018 MY are in NC, both with about 24,000 miles, and both show nearly identical SOH of around 90 pct, after both being in service for 3 and 3.5 years respectively. Both also were QC'd over 250 times in that period in both hot and cold temps (NCTC station was a few min away!)

Cool winter climate, very Hot summer climate. Not humid. Last year our hottest day was 115f. Our weather is very similar to Phoenix, though with less humidity (because the monsoon season moisture doesn't usually get this far north west) Much cooler though than Phoenix during our winter. I always park outside, much cooler outside at night than inside my garage during the summer.

Very few QCs, just L2 charges, usually from around 40% back up to about 75%. We use it as an in-town only car, it doesn't have the range to really do much else for me around where I live.
 
PXNkbanh.png


4 years and 34,500 miles @ 88.32 SOH living in hot Atlanta.
 
danrjones said:
danrjones said:
I haven't updated since Jan 11th. Looks like I must have had an "adjustment" sometime the last week or two, and I (think) I am perilously close to loosing my first battery bar.

For REF on Mar 1st I was at at SOH 87.40

Yesterday:

SOH: 86.00
AmpHr: 99.28
Hx: 94.64
Miles: 13577

My stats as of yesterday:

SOH: 85.97%
AHr: 99.24
Hx:94.49
Miles: 13800


So when should I expect to loose the first battery bar? I must be getting close.

Saturday:
SOH: 85.93%
AHr: 99.20
Hx:94.40
Miles: 14124
 
rogersleaf said:
rogersleaf said:
rogersleaf said:
Turning 50,000 miles. Battery looks very stable over the past 10K miles

LS stats:
AHr... 104.51
SOH... 90.53%
Hx... 100.03%
SOC... 98.5% and 455 GID
403.90v, cells balanced between 4.206-4.209v
odo... 50,110
27 QC / 1230 L2’s
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
 
Back
Top