The 40KWH Battery Topic

[LeftieBiker]

We need a place to post battery info, temperature observations, and other things relating to the new 40kwh pack. There are a few stats scattered in other topics, but having this one should make it easier to keep track of them. Links to the other posts would be a good idea.

When I went to pick up my 2018 SL the other evening, I took advantage of my salesman's need to finish up with other customers to take a quick LeafSpy reading. Here are the main stats (I'll try to post a snap of the screen later):

SOH: 99.59

Hx: 99.48

AH: 114.97

The pack looked extremely well balanced - no shunts at all, IIRC, and all the voltages close. SOC was 95% or so.

https://photos.app.goo.gl/RnFL3g7tvMELhFhC8

Moving on to pack temp observations, I have a suggestion: since the temp gauge is a little...subjective to read, it might be best, when LeafSpy isn't available, to estimate the readings as a percentage, with the far left side of the virtual bar gauge being "0%" and the far right, at the end of the red zone, as 100%. Using that metric, I started the car this evening with the ambient temp at 86 or 87F, a huge rise after a morning low of 46F. The pack was still fairly cool, and I would estimate the gauge was reading "40%" along the scale - somewhat to the left of the middle. I also used an infrared touch-less thermometer to read the exterior (Scarlet) body temp (112F) and a digital thermometer I'd left in the backseat to measure the interior (black/grey seat covers and white trim) temp, which was 104.5F. All of this means little of course, because the pack, with its large thermal mass, hadn't warmed to anywhere near ambient.

It might also be interesting to get other readings of steel body panels (with color noted) in full sun, and interior temps with windows both closed and partially open, along with gauge and LeafSpy readings. One comparison I was able to make today was of my Scarlet Ember Leaf's body in full sun (112F), vs my housemate's "Sea Mist Pearl" (very light green/blue) Prius PHEV (99.5F) also in full sun, behind my car. I'm kind of wishing I'd gone with another Brilliant Silver Leaf after all...

[webeleafowners]

Yudaman Leftie. Some of this stuff is beyond me but I’m glad someone is collecting the data. I have to go into Kelowna tomorow so will be taking a 2018 for a test drive. Should be fun.

[alozzy]

@webeleafowners Remember to update the Coquihalla thread after the trip to Kelowna. Specifically, it would be interesting to know how many kWh of pack energy you lose from Hope to Merritt and from Merritt to Kelowna, and same for the return trip.

Also, if you can drop in at the Britton Creek rest area and see if they've done any work on DCQC installation, that would be much appreciated

[Jerryr]

Here’s my 2018 LeafSpy Battery Stat Page after picking up my new leaf and parking it in my driveway.

Just drove it about 40 miles from dealership to Home and hadn’t charged it yet.

SOC was 76%
AHr 113.99
SOH 98.74%
Hx 98.24%

[LeftieBiker]

Thanks for posting that. Where (city/state) do you live?

[alozzy]

He's in Tampa, Florida

[LeftieBiker]

That may explain the slightly lower SOH. If he can keep the car in an even slightly cooled garage overnights, I suggest that he do so. Letting the pack cool off may be critical for these cars.

[webeleafowners]

@webeleafowners Remember to update the Coquihalla thread after the trip to Kelowna. Specifically, it would be interesting to know how many kWh of pack energy you lose from Hope to Merritt and from Merritt to Kelowna, and same for the return trip.

Also, if you can drop in at the Britton Creek rest area and see if they've done any work on DCQC installation, that would be much appreciated

Good morning Leftie. We came from the other direction for that trip. We are in Vernon. We will be doing the Coquihala in July though so should be able to take a peak at Britton Creek. Maybe it will be done by then.

[DaveinOlyWA]

This will be tough to read until I can get it into a graph or chart of some sort but an example. Drive to work, park open air unshaded asphalt, batt temps 65º. Hottest day of the year upper 80's to low 90's depending on location. Car temps about 60-90 mins after peak temp 93º and batt temps were 69º so not a whole lot of difference. Hard to compare since this is not a data set I collected with prev models although I seem to remember temps rising a bit more than a few degrees. Drive home (13 miles, 50% Freeway) brought batt temps to 73º while ambient dropped no lower than 87º

[DaveinOlyWA]

We need a place to post battery info, temperature observations, and other things relating to the new 40kwh pack. There are a few stats scattered in other topics, but having this one should make it easier to keep track of them. Links to the other posts would be a good idea.

When I went to pick up my 2018 SL the other evening, I took advantage of my salesman's need to finish up with other customers to take a quick LeafSpy reading. Here are the main stats (I'll try to post a snap of the screen later):

SOH: 99.59

Hx: 99.48

AH: 114.97

The pack looked extremely well balanced - no shunts at all, IIRC, and all the voltages close. SOC was 95% or so.

https://photos.app.goo.gl/RnFL3g7tvMELhFhC8

Moving on to pack temp observations, I have a suggestion: since the temp gauge is a little...subjective to read, it might be best, when LeafSpy isn't available, to estimate the readings as a percentage, with the far left side of the virtual bar gauge being "0%" and the far right, at the end of the red zone, as 100%. Using that metric, I started the car this evening with the ambient temp at 86 or 87F, a huge rise after a morning low of 46F. The pack was still fairly cool, and I would estimate the gauge was reading "40%" along the scale - somewhat to the left of the middle. I also used an infrared touch-less thermometer to read the exterior (Scarlet) body temp (112F) and a digital thermometer I'd left in the backseat to measure the interior (black/grey seat covers and white trim) temp, which was 104.5F. All of this means little of course, because the pack, with its large thermal mass, hadn't warmed to anywhere near ambient.

It might also be interesting to get other readings of steel body panels (with color noted) in full sun, and interior temps with windows both closed and partially open, along with gauge and LeafSpy readings. One comparison I was able to make today was of my Scarlet Ember Leaf's body in full sun (112F), vs my housemate's "Sea Mist Pearl" (very light green/blue) Prius PHEV (99.5F) also in full sun, behind my car. I'm kind of wishing I'd gone with another Brilliant Silver Leaf after all...

Your batt stats are shockingly similar to every 2018 I have seen.

Mine ahr/SOH/ HX; 115.05 99.66 99.86

Don't know what you consider the most indicative measure but I look at ahr primarily and after 3 days and 152 miles, it started to drop and has been rock steady consistent without fail. There was one day where I lost a big chunk; .76 ahr, .66% SOH. (Hx is super high and seems to be measuring someone else's pack or something... ) but other than that, its been generally .01 per day or less.