DaveinOlyWA
Gold Member
Posts: 11957
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 10 Nov 2016
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: 2016 30 kWh Battery data

Sat Aug 19, 2017 8:17 am

joeriv wrote:
A shallower charge/discharge curve has been shown to dramatically improve battery life.


Do you have a source on this? I'd like to read about it.



Could be true but Nissan instrumentation masks that. The method Nissan uses to track charge capacity is obviously flawed. ahr is not an easy thing to quantify and the reality is only a ballpark figure is really needed but LEAF Spy makes us want to know why every little fluctuation is happening which I am guessing is one of the "under the table" reasons why LEAF Spy will cease to function on 2018's.

What does seem apparent is shallow cycling increases the error of measurements but several deep cycles and full recharges corrects that.
2011 SL; 44,598 miles. 2013 S; 44,840 miles. 2016 S30 (build 10/2016); 22,003 miles. 363 GIDs, Ahr 82.34, Hx; 101.21% kwh 28.1 QCs 190, L2's 213
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

johnlocke
Posts: 118
Joined: Fri Jan 08, 2016 3:47 pm
Delivery Date: 14 Dec 2015
Leaf Number: 300582

Re: 2016 30 kWh Battery data

Sat Aug 19, 2017 7:13 pm

joeriv wrote:
A shallower charge/discharge curve has been shown to dramatically improve battery life.


Do you have a source on this? I'd like to read about it.

google "shallow cycling of li-ion battery to improve life" for more info. Tesla does this by default, limiting battery charge to 80% unless you invoke travel mode which allows the battery to charge to 100%. Most people automatically limit the discharge depth to 20-30% just because no one wants to run out of charge in the middle of town or on the highway. They just plug back in at the end of the day. I know that I charge anytime I end up below 40% at the end of the day. I also charge up if I know I'm going to drive a lot the next day. Just makes sense.
Jamul, CA
San Diego East County

jbuntz
Posts: 52
Joined: Thu Dec 08, 2016 5:41 am
Delivery Date: 17 Dec 2016
Leaf Number: 303765
Location: New Braunfels, TX

Re: 2016 30 kWh Battery data

Sun Aug 20, 2017 9:43 am

As of Friday I have 9434 mi 60.92 Ah 76%SOH 75.08 hx 14mv cell differences. 278 GID at full charge. 1 bar missing for a week now. About 80 miles of range.

From my stats it seems to indicate it is degrading at a linear rate.
Mfg 11/15 Del 12/16 New Braunfels, TX 2016 SL 30kWh,

30 Apr 2017 5175 miles. 324 GIDs, Ahr 70.75, SOH 89%, Hx; 85.31% kwh 25.1

11 Aug 2017 lost 1 bar 9245 miles. 282 GIDs, Ahr 61.68 SOH 77%, Hx; 75.83% kwh 21.9

lorenfb
Posts: 1240
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: 2016 30 kWh Battery data

Sun Aug 20, 2017 10:07 pm

DaveinOlyWA wrote:
joeriv wrote:
A shallower charge/discharge curve has been shown to dramatically improve battery life.


Do you have a source on this? I'd like to read about it.



Could be true but Nissan instrumentation masks that. The method Nissan uses to track charge capacity is obviously flawed. ahr is not an easy thing to quantify and the reality is only a ballpark figure is really needed but LEAF Spy makes us want to know why every little fluctuation is happening which I am guessing is one of the "under the table" reasons why LEAF Spy will cease to function on 2018's.

What does seem apparent is shallow cycling increases the error of measurements but several deep cycles and full recharges corrects that.


"The 'blind' leading the 'blind." Hyperbole expressed to some can invoke a valid hypothesis!

johnlocke
Posts: 118
Joined: Fri Jan 08, 2016 3:47 pm
Delivery Date: 14 Dec 2015
Leaf Number: 300582

Re: 2016 30 kWh Battery data

Fri Sep 01, 2017 10:38 pm

Just crossed 33000 miles. Current battery stats are 281 Gids at full charge, 61.49AH, SOH=77%, Hx=69.93. 55 QC and 617 L1/L2. 12mv cell balance. I've lost almost a quarter of my battery capacity and am still at 11 bars.

As a quick note, I had to fast charge my battery today and it charged from 15% to 100% in about 28-30 minutes. It was still charging at 80 amps at the end which was odd since normally it starts to taper off at 85-90%. It could be because it was so hot today (101 degrees). I finished the charge and checked the battery temps. 11 bars and 130 degrees. Not good for the battery but I thought that the charge controller monitored battery temps. Don't know why it didn't slow or even stop the charging process.
Jamul, CA
San Diego East County

DaveinOlyWA
Gold Member
Posts: 11957
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 10 Nov 2016
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: 2016 30 kWh Battery data

Sat Sep 02, 2017 6:30 am

johnlocke wrote:Just crossed 33000 miles. Current battery stats are 281 Gids at full charge, 61.49AH, SOH=77%, Hx=69.93. 55 QC and 617 L1/L2. 12mv cell balance. I've lost almost a quarter of my battery capacity and am still at 11 bars.

As a quick note, I had to fast charge my battery today and it charged from 15% to 100% in about 28-30 minutes. It was still charging at 80 amps at the end which was odd since normally it starts to taper off at 85-90%. It could be because it was so hot today (101 degrees). I finished the charge and checked the battery temps. 11 bars and 130 degrees. Not good for the battery but I thought that the charge controller monitored battery temps. Don't know why it didn't slow or even stop the charging process.


I see that all time time with 125 amp chargers. I just did 30 mins at EVGO Tacoma yesterday. started with 5ish %, went to about 95% and was charging about 80 amps as well at the end. My temps only got to the low 110's though. I did hit 11 TBs on my 2nd QC later in the day. Almost to 21,000 miles with 9 days until my 10th month in service and still no loss.
2011 SL; 44,598 miles. 2013 S; 44,840 miles. 2016 S30 (build 10/2016); 22,003 miles. 363 GIDs, Ahr 82.34, Hx; 101.21% kwh 28.1 QCs 190, L2's 213
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

SageBrush
Posts: 1106
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: Colorado

Re: 2016 30 kWh Battery data

Sat Sep 02, 2017 9:57 am

DaveinOlyWA wrote: Almost to 21,000 miles with 9 days until my 10th month in service and still no loss.

No loss ... of what ?
Capacity
Or a bar, that happens at somewhere in the 15-20% loss range ?

I wonder if you realize just how faint your praise is to an outsider looking in, happy that an almost 10 month old car is not displaying severe degradation yet. A normal but uninformed reader might guess you meant to type years.
2013 Model 'S' with QC & rear-view camera
Bought off-lease Jan 2017 from N. California with 63.9 Ahr after 22k miles
Car is now enjoying an easy life in Colorado

DaveinOlyWA
Gold Member
Posts: 11957
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 10 Nov 2016
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: 2016 30 kWh Battery data

Sat Sep 02, 2017 3:50 pm

SageBrush wrote:
DaveinOlyWA wrote: Almost to 21,000 miles with 9 days until my 10th month in service and still no loss.

No loss ... of what ?
Capacity
Or a bar, that happens at somewhere in the 15-20% loss range ?

I wonder if you realize just how faint your praise is to an outsider looking in, happy that an almost 10 month old car is not displaying severe degradation yet. A normal but uninformed reader might guess you meant to type years.


no loss of "anything". still 82.34 ahr, 28.1 kwh available, 363 GIDs, 100% SOH....
2011 SL; 44,598 miles. 2013 S; 44,840 miles. 2016 S30 (build 10/2016); 22,003 miles. 363 GIDs, Ahr 82.34, Hx; 101.21% kwh 28.1 QCs 190, L2's 213
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

ElectricEddy
Posts: 365
Joined: Tue Feb 25, 2014 1:42 pm
Delivery Date: 31 Oct 2016
Leaf Number: 313506
Location: Nanaimo, B.C.

Re: 2016 30 kWh Battery data

Sun Sep 03, 2017 4:02 pm

DaveinOlyWA wrote:
SageBrush wrote:
DaveinOlyWA wrote: Almost to 21,000 miles with 9 days until my 10th month in service and still no loss.

No loss ... of what ?
Capacity
Or a bar, that happens at somewhere in the 15-20% loss range ?

I wonder if you realize just how faint your praise is to an outsider looking in, happy that an almost 10 month old car is not displaying severe degradation yet. A normal but uninformed reader might guess you meant to type years.


no loss of "anything". still 82.34 ahr, 28.1 kwh available, 363 GIDs, 100% SOH....

My #'s are identical to yours but I do notice L.Spy stops counting at 28.1 kwh even though an additional 5 to 6 hundred watts appear to add to the total capacity (the Wh counter) before the relay cuts out,
Strange
Pearl White Sl
mfd date 09/16

DaveinOlyWA
Gold Member
Posts: 11957
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 10 Nov 2016
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: 2016 30 kWh Battery data

Sun Sep 03, 2017 4:35 pm

ElectricEddy wrote:
DaveinOlyWA wrote:
SageBrush wrote:No loss ... of what ?
Capacity
Or a bar, that happens at somewhere in the 15-20% loss range ?

I wonder if you realize just how faint your praise is to an outsider looking in, happy that an almost 10 month old car is not displaying severe degradation yet. A normal but uninformed reader might guess you meant to type years.


no loss of "anything". still 82.34 ahr, 28.1 kwh available, 363 GIDs, 100% SOH....

My #'s are identical to yours but I do notice L.Spy stops counting at 28.1 kwh even though an additional 5 to 6 hundred watts appear to add to the total capacity (the Wh counter) before the relay cuts out,
Strange


this I had not noticed but then again, I wouldn't be watching this anyway. I power up LS daily to record stats but only run it when charging as some fast chargers or when stretching the range.

LS supposedly goes to 375 GIDs but never seen that. I guess I could change the GID value to see how high it goes but then again, why?


FYI; New LEAF may not be compatible with LEAF Spy... that would be a HUGE bummer.
2011 SL; 44,598 miles. 2013 S; 44,840 miles. 2016 S30 (build 10/2016); 22,003 miles. 363 GIDs, Ahr 82.34, Hx; 101.21% kwh 28.1 QCs 190, L2's 213
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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