thankyouOB
Posts: 3583
Joined: Mon Feb 21, 2011 11:14 am
Delivery Date: 30 Apr 2011
Leaf Number: 1442
Location: Coastal LA

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 4:58 pm

maybe its mike's meter.
may reserve/delivery 4/30/11
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ECOtality/LADWP/ Blink 4/4/11
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Gardena Nissan, msrp -1k
red SL with etec L3
SOLAR POWERED since 2008

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mwalsh
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Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 5:39 pm

thankyouOB wrote:maybe its mike's meter.


I think my car's capacity reporting is acting up, if anything - GOM was 74 miles this morning.
2011 Blue Ocean SL with 80,000 miles
2015 pack on 12/30/15
Tinted windows
Bridgestone Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

palmermd
Posts: 2563
Joined: Fri Apr 23, 2010 3:19 pm
Delivery Date: 31 Mar 2011
Leaf Number: 1100011011
Location: Hermosa Beach, CA

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 5:50 pm

mwalsh wrote:
thankyouOB wrote:maybe its mike's meter.


I think my car's capacity reporting is acting up, if anything - GOM was 74 miles this morning.



pure speculation, but perhaps a bad cell module instead of capacity loss. This would explain the GOM going wild over the past few months as well as the GID irregularities. Perhaps it has a bad connection on one module, or just plain bad. Might be worth purchasing the Leafscan to see what is being reported by the on board computer.
Michael

Leaf from 31 March 2011 - Traded 18 April 2018 for Tesla Model 3 Unicorn
Driving electric since 1996


Leaf Bar Loss

tbleakne
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Delivery Date: 03 Jun 2011
Leaf Number: 2400
Location: Claremont, CA

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 5:52 pm

edatoakrun wrote:
tbleakne wrote:
My data:
I used cool recent weather (65 deg F evening, 62 deg F overnight low), to do a rare test of my 100% charge. Result:
271 gids, or 3.6% loss...

When I first finished my SOC meter in late Aug 2011, I never saw more than 274 gids, but with the onset of cooler Fall weather the readings went up, and I hit 281 for most of my winter once-per-month 100% checks. Last 281 was probably February...


RE "3.6% loss", wouldn't it be a good idea to calculate percentage losses, from gid readings, taken at similar temperatures?

You only have a about a 1% gid loss since your highest gid count in late August 2011, right?

Were all those nights significantly warmer, than during your recent 271 result?

Do you have a similar charge temperature gid count recorded from that time (or later) to compare to the present?

Are the 11 bar LEAFs also seeing gid counts variable by temperature?

1. Yes, I am now setup to record garage temperatures, including morning, maximum afternoon (if car present), and minimum over-night.
2. Yes, 271 is about 1% less than the best I achieved last August.
3. Yes, Aug nights are all at least 5-6 degrees F warmer than the highest recent night temperatures, and most of the recent temperatures since my last 281 were an additional 3-4 degrees cooler than the highest recent night temperatures.
4. No, I do not have recorded temperatures from last Aug.
5. (11 bar LEAFs) I don't know. It is a reasonable question, but I would expect that temporary temperature loss would continue to add to permanent capacity loss.

My main concern about the coming summer is possible permanent loss from high daytime temperatures while the car is in the garage with most of a full charge, ready for a planned evening out. My garage gets quite hot in the afternoon, despite its insulated door and solar panels on its roof. The same conditions last summer didn't cost any immediate loss, but it seems possible that the loss effect could be cumulative.
LEAF Ocean Blue SL, "100 % Electric" decals, Delivered June 3, 2011
Sold June 2014 27K miles, 18% capacity loss, 1 bar, 5.0 mi/kWh.
Solar 4.6 KW DC with both string and micro-inverters.

sparky
Posts: 723
Joined: Fri Apr 23, 2010 10:55 am
Delivery Date: 08 Jan 2011
Location: SoCal

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 6:02 pm

Mike's latest readings concerned me and piqued my interest enough that I'm recording my 'Gids', voltage and temp much more frequently.
I really want the battery temp at the beginning and end of charge though, ambient seems less relevant.
Anybody get that CAN code yet?
Mike's LEAF and mine are days apart in age, live in similar climates and are close in miles driven but I'm only at 14k.
Since Jan 2011:
507 charges; Usually 80% but 135 to 100%
Nearly all the 100% charges have been the night before.
Car sits in shade at both home and work. Color: Black
Been to LBW less than 10 times and VLBW once.
I've been checking the 'gid' number off an on since last July.
I've only rarely seen above 275 and never 281.
80% charges have always been 227-233; Yesterday was 231.
100% charges in the last 8 weeks have been 258 to 276 averaging about 269.
So, I'm figuring about 3% loss so far. I'll be looking closely this summer to see if it falls off a cliff.
If I didn't have the measurement tools I'd never have any suspicion that there was any loss. On the same drives ( 25 mi and 50-70 mi) I see very consistent gauge readings. So, perhaps I'll see some more loss over the summer followed by recovery in the Fall. If I get to 2 yrs with 90% capacity I'll be happy as long as it does some leveling off after that.
Last edited by sparky on Tue May 29, 2012 6:05 pm, edited 1 time in total.

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mwalsh
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Leaf Number: 0213
Location: Garden Grove, CA

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 6:03 pm

palmermd wrote:Might be worth purchasing the Leafscan to see what is being reported by the on board computer.


Would if I could. Maybe Ingineer will bump me up to the top of the list in consideration for helping out on getting the EVSE Upgrade business started!
2011 Blue Ocean SL with 80,000 miles
2015 pack on 12/30/15
Tinted windows
Bridgestone Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

palmermd
Posts: 2563
Joined: Fri Apr 23, 2010 3:19 pm
Delivery Date: 31 Mar 2011
Leaf Number: 1100011011
Location: Hermosa Beach, CA

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 6:21 pm

mwalsh wrote:
palmermd wrote:Might be worth purchasing the Leafscan to see what is being reported by the on board computer.


Would if I could. Maybe Ingineer will bump me up to the top of the list in consideration for helping out on getting the EVSE Upgrade business started!


That sounds good. And imagine what it would do to sales of Leafscan if the first unit shipped actually diagnosed a battery problem.
Michael

Leaf from 31 March 2011 - Traded 18 April 2018 for Tesla Model 3 Unicorn
Driving electric since 1996


Leaf Bar Loss

Stoaty
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Joined: Fri Jun 18, 2010 9:50 pm
Delivery Date: 12 Jun 2011
Leaf Number: 3871
Location: West Los Angeles

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 7:44 pm

I am wondering if the scattered reports of capacity loss are due to a bad cell rather than the whole pack aging prematurely. If a cell was marginal, a year plus some heat might be enough to push it over the edge. Obviously Nissan would want to wait as long as possible to make any replacement of marginal cells since it costs them money to do so. It could be that they see a problem developing, but want to wait until the cell fails more severely and pack capacity starts plummeting before doing anything.
2011 Leaf with 62,000 miles given to Nephew
2013 Tesla Model S85 with 251 miles rated range at full charge
Leaf Spy Manual
Battery Aging Model Spreadsheet

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mwalsh
Posts: 9624
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 8:54 pm

I wonder if Nissan actually knows there may be problems yet. I don't think any of us have actually reported it to them, or taken a car in for warranty work for the issue. I'm certainly waiting until I have more than a week of hard data and a month of supposition.
2011 Blue Ocean SL with 80,000 miles
2015 pack on 12/30/15
Tinted windows
Bridgestone Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

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TickTock
Posts: 1701
Joined: Sat Jun 04, 2011 10:30 pm
Delivery Date: 31 May 2011
Leaf Number: 3626
Location: Queen Creek, Arizona
Contact: Website

Re: Lost a "high-voltage battery status" bar, down to 11

Tue May 29, 2012 8:56 pm

Recall the 15% degradation in 9 months is normal thread. I took mine in 3 months ago and got them to run the cell pair test. Despite confirming the loss in capacity/range, all the cells came back in good shape (only 60mV difference between the highest and the lowest cell pair). I go in again in the next few weeks for the mandatory 1 year check. Going to ask for it again since I have seen further degradation since then (am now down to 80%).

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