The 62kWh Battery Topic

[DougWantsALeaf]

SV+ (build may 19, buy Jun 19)
-i missed the first one, but guessing about 1.5%
97.1 95.72 (-1.38%) Feb 29
95.63 94.66 (-.97%) May 20
94.29 94.99 (.7%) Aug 20
94.72 93.36 (-1.36%) Nov 20 (50F)
93.29 93.36 (.07%) Feb 21 (44F)

S+ (build Sep 19, buy June 20)
97.94 98.11 (.17%) Sep 20
97.95 95.4. (-2.55% adjusted over a week) Dec 20

[DaveinOlyWA]

SV+ (build may 19, buy Jun 19)
-i missed the first one, but guessing about 1.5%
97.1 95.72 (-1.38%) Feb 29
95.63 94.66 (-.97%) May 20
94.29 94.99 (.7%) Aug 20
94.72 93.36 (-1.36%) Nov 20 (50F)
93.29 93.36 (.07%) Feb 21 (44F)

S+ (build Sep 19, buy June 20)
97.94 98.11 (.17%) Sep 20
97.95 95.4. (-2.55% adjusted over a week) Dec 20

So I did a winter range test last year (SOH 99.48%) and got 217 miles with 211 actually driven. temps 39-48º Single drive, rain during 85% of it (only place it didn't rain was near home)

So did another range trip last week. Multiple days; one of 88 miles, one of 65 miles. Both of those days were very close to last years trip. Speed maybe slightly lower (miles/kwh were the same) the rest was work commute where it was dry but cold (mid to low 30's in the morning, high 30's at night) but speeds much higher, miles/kwh 3.6, 3.7, 3.9.

range 206 miles, actually drove 191. So still over 200 miles in Winter. An easy summer range calculation adds .5 to .7 miles/kwh or 235 to 248 miles per charge.

Weather has derailed plans for a trip that would have been 150 miles in one shot which probably gives a clearer picture but this only means 3 days to explore just how well the LEAF does in snow with a little bit of help.

[GerryAZ]

Here are my full discharge/charge tests so far on my 2019 SL Plus:

LEAF 2019 Battery Information 3.jpg

The last 3-month update happened between January 12th and January 16th. On 1/12 AHr=165.90, SOH=94.05%, and Hx=100.18%; on 1/16 AHr=165.41, SOH=93.77%, and Hx=100.05%. Hx has bounced up and down since then while AHr and SOH have continued their very slow downward trend. I cannot determine causes for variation in Hx values, but ambient temperatures have varied (we had snow falling, but not sticking to the ground in north Phoenix a week or two ago and it is about 70 F with sunshine today) and my highway vs. suburban driving has also varied.

[DaveinOlyWA]

Here are my full discharge/charge tests so far on my 2019 SL Plus:
LEAF 2019 Battery Information 3.jpg
The last 3-month update happened between January 12th and January 16th. On 1/12 AHr=165.90, SOH=94.05%, and Hx=100.18%; on 1/16 AHr=165.41, SOH=93.77%, and Hx=100.05%. Hx has bounced up and down since then while AHr and SOH have continued their very slow downward trend. I cannot determine causes for variation in Hx values, but ambient temperatures have varied (we had snow falling, but not sticking to the ground in north Phoenix a week or two ago and it is about 70 F with sunshine today) and my highway vs. suburban driving has also varied.

Yeah, Hx is a mystery to me as well. It rises a lot when I DC so I went to AC only charging and it slowly dropped. I was running SOC bet 20-45%. Then had adjustment larger than normal or simply glitch of sorts? (Oct. .21% drop, Jan 1.54% drop) so decided to move the SOC range up so now I am running between 35 and 65% and my Hx is bouncing back up again?

You didn't by chance track your SOC on your tests? Your GID count is off it seems? My dealer is 80 miles away and he knows how much of an SOC stickler I am so he always times my pickups to be fully charged just before I am expected to depart. Twice the car was still charging when I arrrived but my pickup charge was 772 GIDs.

[GerryAZ]

The table is for full discharge/full charge tests (starting September 7, 2019). I drive the car until the battery is nearly depleted and then run climate control in the driveway until it shuts down so that the measured charging energy from the wall gives me a reading of battery capacity as independent of the Nissan controllers as possible. The first 3 lines in the table give some initial readings. The highest "GID" reading I ever recorded was 737 so your 772 is significantly higher. I notice that GID reading at 100% SOC is sometimes a little higher if the car was not deeply discharged before charging so the 737 number (have two charges with that maximum) did not happen after a full discharge. I had 737 GIDS after charging on 9/21/2019 at 2153 miles and 10/27/2019 at 4630 miles. As you can see, the GID reading was 730 after the first full charge on 8/11/2019 at 189 miles and 721 after the first full discharge/charge test on 9/7/2019 at 1149 miles.

[DaveinOlyWA]

The table is for full discharge/full charge tests (starting September 7, 2019). I drive the car until the battery is nearly depleted and then run climate control in the driveway until it shuts down so that the measured charging energy from the wall gives me a reading of battery capacity as independent of the Nissan controllers as possible. The first 3 lines in the table give some initial readings. The highest "GID" reading I ever recorded was 737 so your 772 is significantly higher. I notice that GID reading at 100% SOC is sometimes a little higher if the car was not deeply discharged before charging so the 737 number (have two charges with that maximum) did not happen after a full discharge. I had 737 GIDS after charging on 9/21/2019 at 2153 miles and 10/27/2019 at 4630 miles. As you can see, the GID reading was 730 after the first full charge on 8/11/2019 at 189 miles and 721 after the first full discharge/charge test on 9/7/2019 at 1149 miles.

Interesting. Your GID set to 77.5 wh?

[GerryAZ]

I have the setting at 80 Wh/GID in Leaf Spy to keep data consistent with "GID Meter" data recorded for the 2011 before Leaf Spy became available (so I can compare data for all three cars). Since Leaf Spy reads the "GID" number from the CAN Bus and then uses the multiplier to calculate Wh, that setting should not change the number of GIDs (but will change kWh displayed in Leaf Spy). I measure charging energy with a revenue accuracy meter on the input side of the EVSE so that data does not depend upon Leaf Spy calculations or CAN Bus information from the car's control modules.

[SageBrush]

Here are my full discharge/charge tests so far on my 2019 SL Plus:

Interesting, thanks.

I find it reassuring and useful that the trends of SOH, AHr and charging kWh match up pretty well.

It also looks like you have a pretty efficient EVSE

[danrjones]

Here are my full discharge/charge tests so far on my 2019 SL Plus:
LEAF 2019 Battery Information 3.jpg
The last 3-month update happened between January 12th and January 16th. On 1/12 AHr=165.90, SOH=94.05%, and Hx=100.18%; on 1/16 AHr=165.41, SOH=93.77%, and Hx=100.05%. Hx has bounced up and down since then while AHr and SOH have continued their very slow downward trend. I cannot determine causes for variation in Hx values, but ambient temperatures have varied (we had snow falling, but not sticking to the ground in north Phoenix a week or two ago and it is about 70 F with sunshine today) and my highway vs. suburban driving has also varied.

Yeah, Hx is a mystery to me as well. It rises a lot when I DC so I went to AC only charging and it slowly dropped. I was running SOC bet 20-45%. Then had adjustment larger than normal or simply glitch of sorts? (Oct. .21% drop, Jan 1.54% drop) so decided to move the SOC range up so now I am running between 35 and 65% and my Hx is bouncing back up again?

You didn't by chance track your SOC on your tests? Your GID count is off it seems? My dealer is 80 miles away and he knows how much of an SOC stickler I am so he always times my pickups to be fully charged just before I am expected to depart. Twice the car was still charging when I arrrived but my pickup charge was 772 GIDs.

I've been running an experiment keeping my SOC always between 30 and 70%. Hx has dropped significantly. I'm going to have to end the experiment this Thursday night as I have to charge to 100% to get to my dealer for service Fri AM. I even have done DC fast charging but again within that SOC range. But that data above seems to contradict mine.

So my thinking was that HX in some way relates to time at high or low states of charge.

[Learjet]

So... there are no dealer in my area with a Leaf tech so they are unable to perform the annual battery check...I think I'm going to document this and not worry about it....I have copies of all the leafspy battery information. Wonder if this would cause a problem with a future warranty claim?