Moof
Posts: 179
Joined: Sat Sep 06, 2014 5:11 pm
Leaf Number: 004023
Location: Beaverton, OR

Has anyone had cells replaced?

Mon Oct 27, 2014 4:49 pm

Just curious if there are any stories of battery packs getting repaired, rather than replaced due to low capacity?
2011 Cayenne Red bought used with 30k miles, manufacture data of 5/2011
42k miles 82% SOH 11 bars 218 GIDs at full charge
Running with Michelin Premier A/S with 42 psi for 10k miles

User avatar
TomT
Posts: 10565
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: Foothills of Granada Hills, CA
Contact: Website

Re: Has anyone had cells replaced?

Mon Oct 27, 2014 5:07 pm

None that have been reported. There were a few packs with defective Cells that did have the cell replaced but not for capacity per se

Moof wrote:Just curious if there are any stories of battery packs getting repaired, rather than replaced due to low capacity?
59,991 miles/12 bars/289 Gids/68.54 AHr/101% SOH/101.64% Hx 7May15 w/ new Lizard (barely made the warranty).
71,770 miles/12 bars/256 Gids/59.04 AHr/88% SOH/87.92% Hx 3Mar16 at lease return.

Now driving a 2016 Volt Premier. Model 3 reserved.

Mottyski82
Posts: 69
Joined: Fri May 17, 2013 2:22 pm
Delivery Date: 06 Apr 2013
Leaf Number: 405969
Location: Hinesburg, VT

Re: Has anyone had cells replaced?

Mon Oct 27, 2014 9:16 pm

I would love to understand what constituted the cells being defective. My understanding so far is that the cell voltage test would be the best way to prove cells are under-performing... The big question is, how low do cells have to be, and how many, and maybe even where in the pack as a whole they are...?
Does anyone know for sure? I still think it's best to get the pack healthy by removing the weakest links before the bad cells bring 'em all down. It can't be "that" expensive to warrant the individual modules as opposed to whole pack capacity loss... I don't get why everyone focuses on the capacity warranty...

Charge Forward!! :)

cwerdna
Gold Member
Posts: 7188
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Has anyone had cells replaced?

Mon Oct 27, 2014 11:37 pm

TomT wrote:None that have been reported. There were a few packs with defective Cells that did have the cell replaced but not for capacity per se

Moof wrote:Just curious if there are any stories of battery packs getting repaired, rather than replaced due to low capacity?

The only incident that stands out in my mind is this one:
http://www.greencarreports.com/news/108 ... a-carwings
http://insideevs.com/nissan-leaf-self-d ... -carwings/

I've actually personally met Rob and rode his in Leaf when they were still very new (WAY before the above happened) while I was still living in WA state. Years later, I leased a Leaf...

'13 blue Leaf SV w/premium package (owned)
'13 blue Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

vegastar
Posts: 205
Joined: Mon Dec 13, 2010 11:29 am
Delivery Date: 07 Jul 2011
Leaf Number: 5564
Location: Portugal

Re: Has anyone had cells replaced?

Tue Oct 28, 2014 2:59 am

Here in Portugal there was a car with two cells replaced. I actually tested the car before the replacement and at 80% SOC those cells were allready at 4,08V, and from 80% to a 100% charge it took only 0,5kW.h from the wall. Total capacity was reduced to 10kW.h from 0% to 100%, and only them he received a call from Nissan to replace the cells. The owner was visiting the dealer to report low capacity for about 6 months!

After the replacement the battery capacity was normal.
2011 Nissan LEAF since 2011-07-07, 87000 km on 2015-02-28. 10 bars, 182gids@80%charge, 51.7Ah.

User avatar
dgpcolorado
Posts: 2966
Joined: Sat Aug 20, 2011 1:56 pm
Delivery Date: 15 Dec 2011
Location: The Western Slope, Colorado

Re: Has anyone had cells replaced?

Tue Oct 28, 2014 4:04 pm

I had to dig pretty far back, but this might be of interest with regard to when a cell-pair is considered to be out-of-spec:
palmermd wrote:According to the manual you can take the readings anytime, and the maximum allowed variation is based on the current total pack voltage:

Code: Select all

Total voltage (V)           Approx. 360    Approx. 380    Approx. 390
Max - Min voltage (mV)           230           140             135


so at 373 volts you would have had to had a variation more than 140mV in order to be out of spec. 23mV is pretty well balanced.

Service manual EVB page 129.

viewtopic.php?f=30&t=11399&start=16
Blue 2012 SV Dec 2011 to Feb 2016
CPO 2014 Tesla S60 Mar 2016
One car, no ICE, at last!
Tesla Referral Code

Newbiempls
Posts: 2
Joined: Sun Apr 30, 2017 8:28 pm
Delivery Date: 01 May 2017

Re: Has anyone had cells replaced?

Wed May 03, 2017 1:13 pm

I have not. But I have noticed that on my new-to-me 2012 (I am third owner, it's 2017) that according to LeafSpy, a few cells (6) are noticeably worse than others. Not sure what to do with that info yet.

cwerdna
Gold Member
Posts: 7188
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Has anyone had cells replaced?

Thu May 04, 2017 3:11 am

Newbiempls wrote:I have not. But I have noticed that on my new-to-me 2012 (I am third owner, it's 2017) that according to LeafSpy, a few cells (6) are noticeably worse than others. Not sure what to do with that info yet.

CVLI test? I found these 2 threads.
viewtopic.php?t=11399
viewtopic.php?t=16070

Google for site:mynissanleaf.com cvli test to find more.

The guy at viewtopic.php?f=9&t=21700 got a module replaced: viewtopic.php?p=458180#p458180.

'13 blue Leaf SV w/premium package (owned)
'13 blue Leaf SV w/QC + LED & premium packages (lease over, car returned)
'06 Prius

BiggieJohn
Gold Member
Posts: 35
Joined: Sun Mar 27, 2016 8:43 am
Delivery Date: 25 Mar 2016
Leaf Number: 019136

Re: Has anyone had cells replaced?

Sun May 21, 2017 5:56 pm

When i got my 2012 used, it had a serious problem, was only getting about 18 miles on a full charge, but showed 10 bars.
I didnt have leafspy right away, so no pics of what the situation was, but I took it to my local dealer and Nissan had him tear the battery down to replace 2 modules. Those 2 have always been out of balance with the rest of the pack until recently when I have been driving it hard to try to get the pack down to 8 bars to get it replaced under warranty.
I finally got the 9th bar to drop today, warranty date is June 23rd, and only 43,731 miles, so I dhould be safe

the 2 really high cells in this LeafSpy cap are the ones that were replaced. Whenever I ran the pack down to shutdown, those would always be high by several 100 mv

Screenshot_20170409-104620.png
You do not have the required permissions to view the files attached to this post.
2012 SL Nissan Leaf Glacier White #019136
2015 Chevy Volt summit white #07978

User avatar
RegGuheert
Posts: 5585
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: Has anyone had cells replaced?

Mon May 22, 2017 4:37 am

BiggieJohn wrote:I didnt have leafspy right away, so no pics of what the situation was, but I took it to my local dealer and Nissan had him tear the battery down to replace 2 modules.
Actually, it appears that the dealership only replaced one module (module #29). Each module contains four cells: two parallel pairs in series.
BiggieJohn wrote:I finally got the 9th bar to drop today, warranty date is June 23rd, and only 43,731 miles, so I dhould be safe.
Congratulations! Enjoy your new battery.
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

Return to “Batteries & Charging”