stjohnh
Posts: 363
Joined: Tue Jun 18, 2013 4:27 pm
Delivery Date: 10 Jun 2013
Leaf Number: 409675
Location: Palo Alto, CA

Re: 2013 Low Battery Capacity AHr Battery Degradation

Tue Sep 17, 2013 8:15 am

Here is some of the data for a couple of months for my 2 "Warm Battery" Leafs !!

2013 S at 100% charge

Date Cap Hlth Gids
7/19 60.39 264
7/26 60.34 92.51 262
7/30 60.37 262
9/15 60.78 93.38 264 current odom 3100 miles


2013 SV at 100% charge

7/16 60.3
7/19 60.3 264 gids
7/27 60.83 93.46% 264
7/30 60.72 93.26 263
9/15 60.68 93.17 264 currnet odom 2800 miles

I haven't seen the increase in capacity that boomer has, maybe I need to charge to 100% more. Mostly charge to 80%
Blessings,
Holland

2 LEAFS, bought 1 week apart. 2013 S for me, 2013 SV is wife's. Both manufactured May 2013. I lost first bar at 36,000. Wife still has all bars at 50,000.

User avatar
Boomer23
Posts: 3553
Joined: Sun May 23, 2010 9:57 pm
Delivery Date: 30 Mar 2011
Location: Orange County, CA

Re: 2013 Low Battery Capacity AHr Battery Degradation

Tue Sep 17, 2013 10:12 am

stjohnh wrote:
I haven't seen the increase in capacity that boomer has, maybe I need to charge to 100% more. Mostly charge to 80%
My most recent readings were taken during a 225 mile trip that required three recharges from about 35% SOC to 100% using Level 2. I have found that successive 100% charges have resulted in higher Gid counts and higher AH readings.
Ingineer advised us two years ago that the most accurate Gid counts for full charge will be obtained by charging to 100% at least twice in succession without setting an end timer and allowing a few hours of plugged-in time for balancing after apparent charge completion. In the case of my recent trip, I did charge to 100% four times in a 48 hour period, but I disconnected the plug immediately after the last three of these charges. Rebalancing does clearly happen even when disconnected from mains power.
2018 Tesla Model 3 Long Range RWD
2017 Chevy Bolt EV Premier Kinetic Blue
Blog: http://drivingelectric.blogspot.com" onclick="window.open(this.href);return false;

dm33
Posts: 690
Joined: Sat May 18, 2013 4:43 am
Delivery Date: 31 May 2013
Location: Raleigh, NC

Re: 2013 Low Battery Capacity AHr Battery Degradation

Tue Sep 17, 2013 10:56 am

I did several 100% charges in a row and did see my capacity, GIDS and kwh go up a little to as high as 264 GIDS and 21.1kwh. But now I've hit a new low of 260 GIDS and 20.8kwh at 100% charge.

At this rate I should cross below 90% capacity in a few weeks, although it has suddenly cooled off.

Hard for me to judge if range is any worse since the car reported low capacity and health from the first time I checked it. I'm probably getting better at driving slow and efficiently. We drove 170 miles in one day. 85 miles each way. We recharged at a Nissan dealership to full and came back. Even after 85 miles, we were still showing about 17% left as reported by the car. 5.4mi/kwh reported by the car. Next time we charged to 100% the gom read 103 mile range. First time ever over 100 for us.

But alas our readings are consistently hitting new lows so I tend to believe them.

JonathanT
Posts: 31
Joined: Fri May 24, 2013 2:54 pm
Delivery Date: 24 Oct 2018
Location: Central NJ

Re: 2013 Low Battery Capacity AHr Battery Degradation

Wed Sep 25, 2013 7:10 pm

Just to add a bit more data, my 2013 SV (manufactured July, delivered Aug 3) has 63.6 AHr (average of 10 readings between 16-24 Sep and 830-1110 miles, using Leaf Spy). I have no earlier data. I rarely charge to 100%, and the only measurement I have for full charge is 277 GIDs.

What actually is measured to determine amp hours? Could the apparent variation in capacity among 2013 Leafs be mainly measurement error? It seems that posters with low capacity are seeing normal range.
2013 SV, then 2019 SL powered by 9.9 kW solar PV array in NJ

Berlino
Posts: 661
Joined: Sat Jul 20, 2013 2:28 am
Delivery Date: 05 Aug 2013
Leaf Number: 412600
Location: Quebec City, Canada

Re: 2013 Low Battery Capacity AHr Battery Degradation

Wed Sep 25, 2013 7:56 pm

My 2013 (manufactured June) hemorrhages AHr and Hlth between full charges.

However, full charging always recovers most of the "loss" and I don't feel that range is lower than it should be for a new LEAF.

Delivered AHr : 61.36 August 5
Highest observed AHr: 63.99 August 22
Last AHr the day following a full charge: 63.28 Sep 23
AHr today: 62.15

GIDs after 1st full charge, August 6: 268 (Highest pack temp ~84F)
Highest observed GIDs: August 21: 276
GIDs after last full charge: September 22: 265 (Highest pack temp ~71F)

Hlth has been all over the board. As high as 97.71% and as low as 92.7%. Was 97.21% the day after the latest full charge.
80% charges have ranged from 210 Gids to 219 Gids. Yesterday it was 217.
Ordered: 7/18/13 Delivered: 8/05/13
Red 2013 SL w/premium
EVSE Upgrade, LEAF Spy Pro
Michelin X-Ice Xi3 FIVE months per year.
--------------------------------------
Silver S85.
Selected from inventory w ~500 miles: 3/28/14
Delivered: 3/31/14

Berlino
Posts: 661
Joined: Sat Jul 20, 2013 2:28 am
Delivery Date: 05 Aug 2013
Leaf Number: 412600
Location: Quebec City, Canada

Re: 2013 Low Battery Capacity AHr Battery Degradation

Wed Sep 25, 2013 8:03 pm

I would like to add the SOC as reported by LEAF Spy on a full charge has ALWAYS been 97.3%, but on 80% charges has varied from 79.0% to 80.5%.

The average cell-pair voltage after full charges is ~4.133.

These figures seem to be higher than pre-2013 LEAFs.

Edit: After Tony Williams' contribution, I erase the conjecture about the cell-pair voltages being even higher than early MY13 LEAFs.
Last edited by Berlino on Wed Sep 25, 2013 8:09 pm, edited 1 time in total.
Ordered: 7/18/13 Delivered: 8/05/13
Red 2013 SL w/premium
EVSE Upgrade, LEAF Spy Pro
Michelin X-Ice Xi3 FIVE months per year.
--------------------------------------
Silver S85.
Selected from inventory w ~500 miles: 3/28/14
Delivered: 3/31/14

User avatar
TonyWilliams
Posts: 10104
Joined: Sat Feb 19, 2011 1:48 am
Delivery Date: 02 May 2011
Leaf Number: 002244
Location: Vista, California USA
Contact: Website YouTube

Re: 2013 Low Battery Capacity AHr Battery Degradation

Wed Sep 25, 2013 8:06 pm

Berlino wrote:I would like to add the SOC as reported by LEAF Spy on a full charge has ALWAYS been 97.3%, but on 80% charges has varied from 79.0% to 80.5%.

The average cell voltage after full charges, is ~4.133.

These figures seem to be higher than pre-2013 LEAFs, and perhaps even greater than seen in early MY13 ones.
The slightly higher cell-pair voltage is consistent with the 283-284 Gid readings on MY13 cars.
Thanks,

Tony Williams
QC CHARGE
1497 POINSETTIA AVE
Suite 154
VISTA, CA 92081-8542 USA
Office M-F, 9-5pm Pacific Time
1-760-798-0342
1-844-EV-PARTS
1-844-387-2787

chrisie75
Posts: 11
Joined: Wed Jan 02, 2013 12:16 pm
Delivery Date: 31 Dec 2012
Leaf Number: 026558

Re: 2013 Low Battery Capacity AHr Battery Degradation

Thu Oct 10, 2013 1:34 pm

There might be another possibility, the date that car is assembled is different from the date the battery pack is manufactured.

That's a wild guess. Some 2013 cars might be using battery packs actually made for previous year's? since 60-62Ahr is quite close to that...

stjohnh
Posts: 363
Joined: Tue Jun 18, 2013 4:27 pm
Delivery Date: 10 Jun 2013
Leaf Number: 409675
Location: Palo Alto, CA

Re: 2013 Low Battery Capacity AHr Battery Degradation

Thu Oct 10, 2013 1:49 pm

chrisie75 wrote:There might be another possibility, the date that car is assembled is different from the date the battery pack is manufactured.

That's a wild guess. Some 2013 cars might be using battery packs actually made for previous year's? since 60-62Ahr is quite close to that...
Well, I had thought that the 2013 Leafs were made in Smyrna from May on and in Japan before that. Also I read somewhere that the main battery "stuff" still comes in sheets from Japan, and the batteries are assembled from those sheets in Smyra.
Blessings,
Holland

2 LEAFS, bought 1 week apart. 2013 S for me, 2013 SV is wife's. Both manufactured May 2013. I lost first bar at 36,000. Wife still has all bars at 50,000.

chrisie75
Posts: 11
Joined: Wed Jan 02, 2013 12:16 pm
Delivery Date: 31 Dec 2012
Leaf Number: 026558

Re: 2013 Low Battery Capacity AHr Battery Degradation

Thu Oct 10, 2013 4:37 pm

in theory, once the cell is made, its 'life journey' begins. If new (or nearly new) cars show two and only two capacity values (assuming the measurements are reliable), that's quite possible they are made from two different batch of cells.

Although we all see some variation of capacity measurements in different temp./charging situations, but those differences wont be so significant, and this gap on the other hand, fits in battery life span curve quite well.

We all know Nissan has much higher expectation for 2012 sales which fell short. It wont surprise me that cells manufacturing goes ahead and have to wait for the actual car sales to catch up.

We probably could know better when later time, more new cars roll out.
stjohnh wrote:
chrisie75 wrote:There might be another possibility, the date that car is assembled is different from the date the battery pack is manufactured.

That's a wild guess. Some 2013 cars might be using battery packs actually made for previous year's? since 60-62Ahr is quite close to that...
Well, I had thought that the 2013 Leafs were made in Smyrna from May on and in Japan before that. Also I read somewhere that the main battery "stuff" still comes in sheets from Japan, and the batteries are assembled from those sheets in Smyra.

Return to “Range / Efficiency / Carwings”