SurfHawk
Posts: 83
Joined: Thu Sep 22, 2016 1:43 pm
Delivery Date: 04 Oct 2016
Location: Santa Barbara

Re: Reset Capacity Bars

Thu Oct 27, 2016 5:15 pm

Leaf Spy from just before I bought it.

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2013 Leaf S - Purchased 10/2016
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baustin
Posts: 711
Joined: Tue Feb 24, 2015 1:23 pm
Delivery Date: 09 Mar 2015
Leaf Number: 402162
Location: North Las Vegas, NV

Re: Reset Capacity Bars

Thu Oct 27, 2016 6:30 pm

The charge cycle has to completely finish for the cells to be balanced. If it is being stopped by the timer, then they are not getting balanced. If it has not been done for a while, it may take four or five full charge cycles to get the cells fully balanced. Charge cycles require a lot more time to complete when using the L1 EVSE.
2013 Leaf SV - Cayenne Red - QC Port - LED Headlights

AntronX
Posts: 83
Joined: Sun May 22, 2016 12:17 pm
Delivery Date: 14 May 2016

Re: Reset Capacity Bars

Thu Oct 27, 2016 7:30 pm

baustin wrote:The charge cycle has to completely finish for the cells to be balanced...
I keep seeing this posted here, and it does not make sense. Look at first leafspy page. All those red lines are cells being bled off via balancing resistors in BMS. It happens all the time, regardless of the SOC. I think you are perpetuating the myth that you need to charge to full in order for balancing to occur.

LeftieBiker
Moderator
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Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Reset Capacity Bars

Thu Oct 27, 2016 8:46 pm

- First couple weeks I only charged to 80%. Then I read about re-balancing so I've been charging to 100%. However I have been using the charging timer, does that let it re-balance? Also, I am only charging via L1 at home, getting L2 installed next week. Some brief L2 charging in the wild a few times a week.
If you don't set an end time with the timer, and the charge lights are all off when you unplug the car, then it is charging and equalizing fully. If you do set an end time, then it may not be doing so.
Last edited by LeftieBiker on Thu Oct 27, 2016 9:51 pm, edited 1 time in total.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
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TimLee
Posts: 2811
Joined: Thu Jan 20, 2011 9:40 am
Delivery Date: 17 May 2011
Leaf Number: 2026
Location: Chattanooga, TN

Re: Reset Capacity Bars

Thu Oct 27, 2016 8:58 pm

Keep in mind that the reset is "Clear Long Term Capacity Data".

It is possible that SOH which seems to correlate with capacity will take the longest to adjust back.
Maybe 4 to 8 weeks, 10 to 30 charge and discharge cycles plus miles driven.

AHr may adjust quicker.
But it could still be badly out of whack.

Hx which is based on pack conductance (inverse of resistivity) will likely adjust fastest.

Maybe one charge /discharge cycle, 100 miles since the BMS is measuring it much more directly.

I would look at that first.

Tim Lee
Chattanooga, TN

Man. Date: 03/10/11, VIN # 2026
Delivered 05-17-2011
Blue Ocean, 2011 SL-eTec

SurfHawk
Posts: 83
Joined: Thu Sep 22, 2016 1:43 pm
Delivery Date: 04 Oct 2016
Location: Santa Barbara

Re: Reset Capacity Bars

Thu Oct 27, 2016 10:05 pm

I'm using the built in timer on the S trim, setting it to finish by 8am. Based on my utility reports, it's finishing by 6am. When I get to it at 8am, no blue lights are on and it's at 100%.
2013 Leaf S - Purchased 10/2016
4kW Solar - Installed 11/2016

cwerdna
Posts: 11136
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Reset Capacity Bars

Thu Oct 27, 2016 11:03 pm

SurfHawk: Unless you battery usage range is really narrow (e.g. charge to 80%, go down to only say 60% then charge to 80%), I think it's somewhat likely you were a reset victim.

I posted my used '13 SV stats on a 5/2013 built car that I bought in mid-7/2015 at http://www.mynissanleaf.com/viewtopic.p ... 25#p430825.

Of course the stats have generally crept downwards but not as rapidly as yours. Today (10/27/16), more than a year and 3 months later, my stats were these:
AHr: 57.09
SOH: 87%
Hx: 85.69%
odo: 38,749 miles

The stats fluctuate. About the worst recent stat I had was from 10/24/16:
AHr: 56,84
SOH: 86%
Hx: 85.15%
odo: 38,660 miles

Let's see if your keeps rapidly falling and you start losing capacity bars. I've still got all 12 of mine but am getting progressively closer to losing 1. What was the build month on your car? Where did it previously reside?

'19 Bolt Premier
'13 Leaf SV w/premium (owned)
'13 Leaf SV w/QC + LED & premium (lease over)

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

baustin
Posts: 711
Joined: Tue Feb 24, 2015 1:23 pm
Delivery Date: 09 Mar 2015
Leaf Number: 402162
Location: North Las Vegas, NV

Re: Reset Capacity Bars

Fri Oct 28, 2016 9:11 am

AntronX wrote:
baustin wrote:The charge cycle has to completely finish for the cells to be balanced...
I keep seeing this posted here, and it does not make sense. Look at first leafspy page. All those red lines are cells being bled off via balancing resistors in BMS. It happens all the time, regardless of the SOC. I think you are perpetuating the myth that you need to charge to full in order for balancing to occur.
The equalization process (balancing) is done at the end of charge cycle, after the BMS determines charging is complete, and takes at least 25 minutes. The issue with cells that are not fully balanced only affects those that use the 80% charge option, or some other method to stop the charge cycle from completing. If you prefer to believe that the issue is a perpetuated myth, that is your choice.
2013 Leaf SV - Cayenne Red - QC Port - LED Headlights

AntronX
Posts: 83
Joined: Sun May 22, 2016 12:17 pm
Delivery Date: 14 May 2016

Re: Reset Capacity Bars

Fri Oct 28, 2016 9:58 am

baustin wrote:The equalization process (balancing) is done at the end of charge cycle, after the BMS determines charging is complete, and takes at least 25 minutes. The issue with cells that are not fully balanced only affects those that use the 80% charge option, or some other method to stop the charge cycle from completing. If you prefer to believe that the issue is a perpetuated myth, that is your choice.
How do we know this?

baustin
Posts: 711
Joined: Tue Feb 24, 2015 1:23 pm
Delivery Date: 09 Mar 2015
Leaf Number: 402162
Location: North Las Vegas, NV

Re: Reset Capacity Bars

Sat Oct 29, 2016 2:25 am

AntronX wrote:
baustin wrote:The equalization process (balancing) is done at the end of charge cycle, after the BMS determines charging is complete, and takes at least 25 minutes. The issue with cells that are not fully balanced only affects those that use the 80% charge option, or some other method to stop the charge cycle from completing. If you prefer to believe that the issue is a perpetuated myth, that is your choice.
How do we know this?
Start a charge cycle on a fully-charged battery and see how long it takes to complete.

Read the multitude of threads, going back to the beginning of MNL, that cover the charging and balancing topics in great detail.
2013 Leaf SV - Cayenne Red - QC Port - LED Headlights

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