The 62kWh Battery Topic

[Daklein]

recent update: mileage shown includes 28k miles on original battery, so mileage on the 62kwh battery is at about 64000 miles and approaching 5 years in the car.

 

[DougWantsALeaf]

Looks good

 

[DaveinOlyWA]

recent update: mileage shown includes 28k miles on original battery, so mileage on the 62kwh battery is at about 64000 miles and approaching 5 years in the car.
View attachment 5165

Pretty normal. I am at 59,000 on OEM 62 kwh pack at 89.71% SOH, HX 109.45. SOC range typically between 35 to 70%

 

[DougWantsALeaf]

The 62 Packs appear to be aging very consistently.

 

[knightmb]

Just recently passed 100,000 miles (160,934 km) Since I've owned it from new to now, I have a good history log on the maintenance, cost, etc. associated with driving it. I will create a separate topic later that details all the cost and savings versus if I was just driving an economical gas counterpart instead for those 100k miles.

 

[DaveinOlyWA]

Just recently passed 100,000 miles (160,934 km) Since I've owned it from new to now, I have a good history log on the maintenance, cost, etc. associated with driving it. I will create a separate topic later that details all the cost and savings versus if I was just driving an economical gas counterpart instead for those 100k miles.

Good job! What has been your Hx history? Has it always been low or did it slowly drop?

 

[Learjet]

2019 with 42,141 miles SOH 87.76% and Hx 72.60%

 

[knightmb]

Good job! What has been your Hx history? Has it always been low or did it slowly drop?

Looking at the LeafSpy logs it is kind of all over the place.

It didn't drop below 100 until January of 2023 but it has been back up over 100 and then back down, so it seems to be a slow progress roller-coaster. When I get everything put together, I'll make a new topic that has all the data in it, LeafSpy logs for the past years included, etc. It is nice to have a complete log and not pieces like I had on my other Leaf due to failing phones over the years.

 

[DougWantsALeaf]

Finally splurged and bought the recommended relink dongle. My May built 2019 SV+ is at 39K miles, 89.37% SoH and 95.62% Hx

 

[Ancient1]

LeafSpy shows Hx at 72.3%. Is there anything that can be done to bring that number up? Should I be concerned?

 

[Learjet]

LeafSpy shows Hx at 72.3%. Is there anything that can be done to bring that number up? Should I be concerned?

same as my 2019. no issues and no one quite knows what that number means and what is a bad number. Drive your car...be happy.

 

[lorenfb]

LeafSpy shows Hx at 72.3%. Is there anything that can be done to bring that number up? Should I be concerned?

same as my 2019. no issues and no one quite knows what that number means and what is a bad number. Drive your car...be happy.

On Gen1, Hx represents the battery conductance, the reciprocal of resistance, and decreases over time with SOH.
It's not a percentage, as data recorded over three years indicate. As Gen2 ages (5+yrs), Hx appears to follow Gen1.

11/20/14 -13,700 miles, 76 mohms per LeafDD, 20 Deg, 73% SOC, 90% SOH
11/27 -13,800 miles, 67 mohms per LeafDD, 25 deg, 63% SOC
11/30 - 13,900 miles, 56 mohms per LeafDD, 27 deg, 71% SOC
12/2 - 14.100 miles, 55 mohms per LeafDD, 28 deg, 67% SOC
12/16 - 14,500 miles, 89 mohms per LeafDD, 15 deg, 93% SOC
12/27/14 - 14,800 miles, 103 mohms per LeafDD, 11 deg, 24% SOC
3/10 - 17,400 miles, 60 mohms per LeafDD, 30 deg, 73% SOC
3/14 - 17, 550 miles, 56 mohms per LeafDD, 32 deg, 47% SOC, 85% SOH
4/14 - 19,100 miles, 59 mohms per LeafDD, 25 deg. 38% SOC
5/4 - 19,989 miles, 64 mohms per LeafDD, 24 deg. 48% SOC
5/15 - 20,400 miles, 73 mohms per LeafDD, 20 deg. 41% SOC
5/22 - 20,700 miles, 58 mohms per LeafDD, 28 deg. 50% SOC
12/10/15 - 28,000 miles, 90 mohms per LeafDD, 19 deg. 92% SOC
4/5 - 32,000 miles, 74 mohms per LeafDD, 24 deg, 55% SOC
5/16 - 33,700 miles,89 mohms per LeafDD, 22 deg, 47% SOC
5/16 - 33.700 miles, 58 mohms per LeafDD, 31 deg, 76% SOC, 80% SOH
10/5 - 39,300 miles, 100 mohms per LeafDD, 22 deg, 50% SOC
10/6 - 39,400 miles, 61 mohms per LeafDD, 30 deg, 51% SOC
10/7 - 39,500 miles, 80 mohms per LeafDD, 25 deg, 56% SOC
10/15 - 40,000 miles, 71 mohms per LeafDD, 27 deg, 45% SOC
10/30 - 41,000 miles, 74 mohms per LeafDD, 23 deg, 66% SOC
12/26/16 - 43,000 miles, 110 mohms per LeafDD, 13 deg, 77% SOC
6/10/17 - 49,600 miles, 89 mohms per LeafDD, 19 deg, 70% SOC
7/1/17 - 51,000 miles, 62 mohms per LeafDD, 33 deg, 44% SOC
8/15/17 - 53,400 miles, 61 mohms per LeafDD, 35 deg, 57% SOC, 75% SOH

 

[Learjet]

On Gen1, Hx represents the battery conductance, the reciprocal of resistance, and decreases over time with SOH.
It's not a percentage, as data recorded over three years indicate. As Gen2 ages (5+yrs), Hx appears to follow Gen1.

11/20/14 -13,700 miles, 76 mohms per LeafDD, 20 Deg, 73% SOC, 90% SOH
11/27 -13,800 miles, 67 mohms per LeafDD, 25 deg, 63% SOC
11/30 - 13,900 miles, 56 mohms per LeafDD, 27 deg, 71% SOC
12/2 - 14.100 miles, 55 mohms per LeafDD, 28 deg, 67% SOC
12/16 - 14,500 miles, 89 mohms per LeafDD, 15 deg, 93% SOC
12/27/14 - 14,800 miles, 103 mohms per LeafDD, 11 deg, 24% SOC
3/10 - 17,400 miles, 60 mohms per LeafDD, 30 deg, 73% SOC
3/14 - 17, 550 miles, 56 mohms per LeafDD, 32 deg, 47% SOC, 85% SOH
4/14 - 19,100 miles, 59 mohms per LeafDD, 25 deg. 38% SOC
5/4 - 19,989 miles, 64 mohms per LeafDD, 24 deg. 48% SOC
5/15 - 20,400 miles, 73 mohms per LeafDD, 20 deg. 41% SOC
5/22 - 20,700 miles, 58 mohms per LeafDD, 28 deg. 50% SOC
12/10/15 - 28,000 miles, 90 mohms per LeafDD, 19 deg. 92% SOC
4/5 - 32,000 miles, 74 mohms per LeafDD, 24 deg, 55% SOC
5/16 - 33,700 miles,89 mohms per LeafDD, 22 deg, 47% SOC
5/16 - 33.700 miles, 58 mohms per LeafDD, 31 deg, 76% SOC, 80% SOH
10/5 - 39,300 miles, 100 mohms per LeafDD, 22 deg, 50% SOC
10/6 - 39,400 miles, 61 mohms per LeafDD, 30 deg, 51% SOC
10/7 - 39,500 miles, 80 mohms per LeafDD, 25 deg, 56% SOC
10/15 - 40,000 miles, 71 mohms per LeafDD, 27 deg, 45% SOC
10/30 - 41,000 miles, 74 mohms per LeafDD, 23 deg, 66% SOC
12/26/16 - 43,000 miles, 110 mohms per LeafDD, 13 deg, 77% SOC
6/10/17 - 49,600 miles, 89 mohms per LeafDD, 19 deg, 70% SOC
7/1/17 - 51,000 miles, 62 mohms per LeafDD, 33 deg, 44% SOC
8/15/17 - 53,400 miles, 61 mohms per LeafDD, 35 deg, 57% SOC, 75% SOH

So what does that actually mean?

 

[lorenfb]

So what does that actually mean?

Just another parameter to gauge how the battery is aging over time. It's similar to a battery load test.

 

[Jeffrey Stumpf]

Just another parameter to gauge how the battery is aging over time. It's similar to a battery load test.

Per LeafSpy Pro:
1. Hx (% of new battery conductance)
2. Hx The meaning of this number is not fully understood but it appears to be inversely related to the battery internal resistance. As the internal resistance of the battery pack increases it is thought this percentage decreases. As internal resistance increases more energy is lost within the pack and the pack heats up more under load.

[Note:
1. My new 2024 SV Plus on 10/18/2023 at pick up had Hx=96.68 at 9 miles with 3 QC and 2 L1/L2 charges and SOH=98.22%.
2. Now Hx=80.86 at 8,513 miles, with 47 QC and 374 L1/L2 charges and SOH=98.16%. ]

To paraphrase https://www.reddit.com/user/MrPuddington2/
:
1. Hx is the conductance of your battery pack, relative to nominal (100%). The lower the conductance, the less power the battery can take or deliver. The unit of conductance is Siemens, but Hx is a dimensionless number.

2. Hx typically drops faster than SOH ( State Of Health / Battery Capacity), but Hx has much less impact on the utility of the vehicle, because the impact on range is quite small. Unless your Hx is below 50%, I would not worry too much.

 

[DaveinOlyWA]

So what does that actually mean?

Nothing. It is his evaluation of his personal experience. My evaluation says the higher the Hx, the better. I am at 60K miles on a 5 year old (and one week) LEAF and my Hx is 107+

As far as consistency? Not enough data to say and as always there are a few outliers that have low (under 90) Hx and still have a healthy SOH but generally the low Hx'ers are also on the low end of the average SOH. I used to think age was the issue but now that mine is 5 years old, the pointer is starting to shift to SOC range and likely charging habits.

 

[Jeffs231Leafp]

_The_ place to post battery info, SOH (state of health), Ahr (capacity), temperature observations over time, with info about how the pack is being treated, and other things relating to the new 2019+ 62kWh Plus pack. (Like the The 40kWh Topic): https://www.mynissanleaf.com/viewtopic.php?f=9&t=25773

There are a few stats scattered in other topics, but having this one should make it easier to keep track of them. The one I've seen is the Leaf Plus efficiency thread: https://www.mynissanleaf.com/viewtopic.php?f=31&t=29971 Please add Links if there are other threads with data points on the 62kWh pack. If we find ourselves bored, someone can summarize and plot the data in a google spreadsheet.

My pack came without a car :shock: , but it looks like it's in good shape. It came from a salvage yard near Smyrna TN, likely from a dismantled non-saleable development vehicle, allegedly with 6000 miles on it. We'll see on first discharge if it stays well balanced or not. It could always look fine top balanced but fall apart on discharge if some cells are special. I hope to get it running in the near future, and enjoy living with 62kWh! I'm curious to see if having it sitting at 91% SOC until I get it running (plus who knows how long before I got it) will impact the SOH at all.

My pack, s/n 000006 (bet I have the lowest serial number?!) estimated 6000 miles, previous history & usage unknown other than likely located in TN.
11/6/19 https://photos.app.goo.gl/QpEMnsqR91j9sXJA8
171.95 AHr
97.48 SOH
109.33 Hx

There were two other 62 packs that I checked with Leafspy also. They looked just about as good Ahr & SOH, but some external damage.
I don't know where these ended up, they were gone in less than a week after I got mine and posted here about them. https://mynissanleaf.com/viewtopic.php?f=34&t=27600&start=157

s/n 000015 looked just fine on Leafspy, well balanced I guess, but a couple monster dents that at least hit the cell frames.
s/n 000010 had near-zero external dents, but a broken HV connector. And it had a funny looking cell voltage histogram. Still only 16 mV spread, but showing every odd cell high and shunted, every even cell lower and not shunted. Just a curiosity. Lower SOC than the other two, could be random, but could be self discharging too. Does the BMS shunt when not charging? Bad BMS, purposely mis-balanced for a test, purposely constructed pack with half 'bad' lower capacity cells? Anyone see something like this and can explain why? https://photos.app.goo.gl/ZeWWawBPGZ6mav3y

 

[Jeffs231Leafp]

What area, close by city, country?

 

[hornstudio]

My 62 2020 has 50000km 165.5Ah and Hx104%
My 62 2023 has 15000km 166.0Ah and Hx83%

So? Any thoughts?

 

[Jeffrey Stumpf]

My 62 2020 has 50000km 165.5Ah and Hx104%
My 62 2023 has 15000km 166.0Ah and Hx83%

So? Any thoughts?

The 2023 reading is in line and similar to the Hx readings on my 2023 Leaf SV Plus and my 2024 SV Plus. ( Both HV Batteries are now called 60 kWh by Nissan ). I believe your 2020 may need a firmware update or is extra ordinary.
The 2024;
1. When new on 10/18/2023:
odo=14 miles, Hx=96.69, SOH=98.22%, QC=3, L1/L2=3
2. Now more than a year later on 11/27/2024:
odo=9,716 miles, Hx=80.69, SOH=98.15%, QC=47, L1/L2=392