DaveinOlyWA
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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 2:52 pm

Ya Vicki when the pack is full and there is no regen the car drives completely different especially when i drive eco all the time so when it slowed down at the stop sign (about 100 feet from my garage) it was "shocking"

so tomorrow i will recharge to full during the day where should see temps around 105 and a "pre conditioned" LEAF. remember it started at 6 TBs this morning (first time ever) and i did a 12 Kwh QC in Centrailia today. pulled out and still had 6 TBs which surprised me.

so i am tooling down the road @ 60 mph with A/C set to 75 and OAT at 93 and five miles down the road, TB #7 showed up (first time ever!! but keep in mind, last year i dont think we hit 90º all summer) . so guess it takes a while for the gauge to react to the temperature change.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 7059.6 mi, 95.35% SOH
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vrwl
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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 4:03 pm

DaveinOlyWA wrote:so i am tooling down the road @ 60 mph with A/C set to 75 and OAT at 93 and five miles down the road, TB #7 showed up (first time ever!! but keep in mind, last year i dont think we hit 90º all summer) . so guess it takes a while for the gauge to react to the temperature change.
Yeah, over the summer, it seemed that I would get the 7th bar towards the end of my 30 mile trip, even when it was well over 100 when I started the drive for the day, so I've come to that conclusion as well. Probably because of the mass of the pack, it just takes awhile for the whole thing to get hot.
Vicki
2011 Silver SL-Mfg 8/11-Purch 6/12
34000 miles

Pipcecil
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Location: Midlothian, TX

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 6:50 pm

I wanted to report my second battery capacity loss:

Almost 2 full months from first bar (14 months total) - it will be 14 months tomorrow

Mileage: 23,652 (3,446 from first bar loss).

Habits between the first and second bar:
Trying to be as careful on the battery as I can, but because of range loss I am having to charge to 100% more often than just the weekends and have had multiple instances of QCing twice in a day.

I reported the problem to Nissan hotline under the same case (just updated the case) today to the same rep (Ricky). Interestingly, Nissan asked what my range was at 12 bars, 11 bars, and now 10 bars. In addition, they asked for information if I was still able to make trips I had before (such as to work, play, etc.) and my driving habits.

While I don't have hard core test runs and data (like ticktock) or oppossum/azdre on range, I do have some general data on my range. Usually I would push my car (not on purpose to one bar or LBW). Estimating the last few miles @ one bar is less room for error, so I figure my general estimates are in a good "ballpark." This is what I told Nissan:

12 bars (last summer) ~ mid 80's total range
11 bars (early 2012 summer) ~ mid 70's range
10 bars (end 2012 summer) ~ high 60's range

My trip yesterday, wind 5 mph (crosswind) and temps ~100 produced a range of ~ 60 miles to LBW, this jives with my numbers. I average 4 mi/kWh and do a decent amount of highway driving.

Odd note, its been a rather cool summer in Dallas-Fort Worth. We only have a handful of 100+ degree temps and maybe a couple over 105+ This is atypical. Today, when I got my bar loss, it was in the low 90's outside (I have never seen it this cool during August here).
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Stoaty
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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 7:33 pm

Pipcecil wrote:I wanted to report my second battery capacity loss:

Almost 2 full months from first bar (14 months total) - it will be 14 months tomorrow

Mileage: 23,652 (3,446 from first bar loss).
Sorry to hear it. Wiki updated. Latest Wiki stats:

55 documented cases of battery capacity loss of one or more bars

The geographic breakdown of these cases is:
Arizona - 36
Texas - 13
California - 6.

The breakdown by number of capacity bars lost is:
one bar - 30
two bars - 21
three bars - 4.

http://www.mynissanleaf.com/wiki/index. ... acity_Loss" onclick="window.open(this.href);return false;
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Stoaty
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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 7:40 pm

There is a guy posting on Nissan Facebook page, Ira Applebaum:

"Major battery problems . Battery down to 50% in less than two years. Can't do a 58 mile round trip to work anymore. Nissan says see the dealer. Dealer says see Nissan. Our immediate family has owned 15 new Nissans since 1992. Horrible customer service!"

I am not going to add him to the Wiki without a lot more documentation, since 50% decrease sounds suspect. Apparently he lives in the Phoenix area.
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OrientExpress
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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 7:41 pm

Now plot how many miles these 55 cars have on them vs. how long they have been in service vs. how many bars they have lost.
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Stoaty
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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 7:47 pm

OrientExpress wrote:Now plot how many miles these 55 cars have on them vs. how long they have been in service vs. how many bars they have lost.
Feel free to do this and post your results. The available data is in the Wiki. Probably not the optimal comparison, since another variable is the ambient temperature, which may vary significantly between Phoenix, and say, Dallas. Comparison for cars in Phoenix already done in this thread:

http://www.mynissanleaf.com/viewtopic.php?f=4&t=9548" onclick="window.open(this.href);return false;

Very little correlation was seen.
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OrientExpress
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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 8:27 pm

It looks like all of these cars are high mileage ones, ie. more than 15k a year.
2018 LEAF SL
Gun Metalic
Delivery April 10 2018

Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

shrink
Posts: 360
Joined: Sun Aug 07, 2011 11:21 pm
Delivery Date: 26 Jun 2012
Leaf Number: 21842
Location: Phoenix, AZ

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 9:01 pm

OrientExpress wrote:It looks like all of these cars are high mileage ones, ie. more than 15k a year.
Wrong. Again.
Lost 3rd Bar, down to 9 bars only!

Date of Loss: 08/14/12
Location: Phoenix, AZ
Mileage At Loss: 7,767

http://www.mynissanleaf.com/viewtopic.p ... 03#p220403" onclick="window.open(this.href);return false;
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Stoaty
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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Thu Aug 16, 2012 9:10 pm

OrientExpress wrote:It looks like all of these cars are high mileage ones, ie. more than 15k a year.
Wrong. I took all of the one bar lost cars that have mileage and months owned, then normalized them for the annual mileage rate. Results:

Mean - 14,261
Median - 14,182
Standard deviation - 3,917

Here are the normalized annual mileages, sorted in ascending order:

7,034
8,541
8,743
9,018
9,122
9,500
9,750
10,400
10,507
10,575
10,800
11,262
11,391
11,400
11,675
12,000
12,094
13,228
13,633
13,867
13,984
14,000
14,068
14,182
14,500
15,000
15,231
15,281
15,345
15,529
15,700
15,733
16,000
16,494
16,500
17,506
18,000
18,444
18,873
20,200
20,400
20,571
20,690
20,974
24,000

I think 14,000 miles a year is a pretty "normal" mileage.
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2013 Tesla Model S85 with 251 miles rated range at full charge
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