mark13
Posts: 393
Joined: Tue Sep 14, 2010 2:28 pm

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

Wed May 30, 2012 10:55 pm

LEAFfan wrote:I believe thats what happen to me ..2 days after perfect battery check I lose a bar :o
TonyWilliams wrote:
cdub wrote:Got my 1 year checkup today... capacity has dropped 100%.

No I'm kidding... everything is fine. 12,500 miles all capacity bars. Battery check all 5 stars. I didn't get a percentage though.


None of that will identify capacity loss less than 15%

You could be 14% down on capacity and still get five stars and have all 12 capacity bars.


+ 1!

xtremeflyer
Posts: 313
Joined: Tue Sep 28, 2010 2:13 pm
Delivery Date: 03 Aug 2012
Location: Orange, CA

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

Thu May 31, 2012 7:43 am

Boomer23 wrote:
TonyWilliams wrote:
You dont need a LEAFSCAN to check the count of wattHours with a Gidmeter. There are dozens and dozens of these out there, and I'm sure you can find somebody who will loan you one in a major California city (I have no idea where you are).



xtreme and I are friends. Perhaps I can stop by your place one Saturday morning before a breakfast meetup and check your Gids after a full charge. Our Santa Ana meet isn't until June 23, though. We can PM to set something up.


Yea, I was talking about Boomer not Ingineer. Most days I can plug into a 120v plug at work for a couple of hours in the afternoon, but not always. Unfortunately I don't know until that afternoon if it'll be available. (the only plug in the parking lot is for the car wash guys vacuum. Sometimes he's done at 1pm, sometimes he's done at 4pm. I've asked for another plug, but the building owners won't budge.

User avatar
Ingineer
Posts: 2741
Joined: Fri Oct 15, 2010 1:09 pm
Delivery Date: 13 Jul 2011
Leaf Number: 6969
Location: Berkeley, California
Contact: Website

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

Thu May 31, 2012 1:10 pm

TonyWilliams wrote:You dont need a LEAFSCAN to check the count of wattHours with a Gidmeter. There are dozens and dozens of these out there, and I'm sure you can find somebody who will loan you one in a major California city (I have no idea where you are).
While you can get an approximation with a full charge, Since Gids at full charge are variable, you can't get a very accurate number, in addition, factors such as a hot/cold pack or a imbalance can cause an artificially low gid reading temporarily. You also have to perform a full charge in order to check.

LEAFSCAN can read the battery ECU's internal capacity loss numbers, including internal resistance, and can also tell if it's only one or 2 modules, or just a general loss across the whole pack. The capacity loss coefficient that can only be read by LEAFSCAN is what the capacity bars are based on. This can be done at any SoC and any temperature. No need to charge to check, it takes only seconds.

-Phil
Easily Learn Electricity HERE! - - - - Website: http://evseupgrade.com/ - - - - Like us on Facebook: EVSE Upgrade

mkjayakumar
Posts: 1219
Joined: Thu Mar 08, 2012 9:13 am
Delivery Date: 08 Mar 2012
Location: Plano, TX

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

Thu May 31, 2012 1:25 pm

I want my Leafscan NOW !!
2011 Leaf, 30K miles, returned after 24 month lease.
Currently leasing 2014 Leaf SV.

tbleakne
Gold Member
Posts: 983
Joined: Wed Jul 28, 2010 12:05 pm
Delivery Date: 03 Jun 2011
Leaf Number: 2400
Location: Claremont, CA

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

Thu May 31, 2012 2:07 pm

EdmondLeaf wrote:
leafkabob wrote:Mon-Fri my car is parked in a large parking structure that is very open to breezes and airflow. I'm not sure what the temperature difference would be from being in the full sun on hot pavement, but I would think it would be significant. In the evenings and weekends my car is parked in my detached garage (uninsulated, but gets partial shade from large trees).

I also cleverly (I thought) timed my 80% charges to begin at 3 am. In hindsight I'm not sure that made any difference.


I really feel for you:
charging to 80%, late at night did not protect you
parking in perfect condition did not protect you
low mileage did not protect you

More suggestions, which may or may not be practical for your situation:
The data at the Battery University site link posted by JPWhite, while not specific for our Li-Mn chemistry, suggests that storing at charge levels below 80% yields additional benefit. Any change you can do to minimize time spent at high charge and high temperature will help. Perhaps you could add a fan to your garage to reduce how much time the car spends at elevated temperatures on the weekend. Perhaps you can sometimes top-off your charge just before you head-out.

Charging at 3 am probably does not help too much, but the charging process adds some heat of its own.

BTW, over a year ago, when I posted some other battery data from the Battery University, some comments in this forum suggested their data was obsolete and our wonderful Nissan batteries would perform much better. With real experience, we are learning.
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.

User avatar
JPWhite
Gold Member
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Re: Lost a "high-voltage battery status" bar, down to 11

Thu May 31, 2012 2:32 pm

mkjayakumar wrote:I want my Leafscan NOW !!


+1,000,000
--
JP White
http://jpwhitenissanleaf.com
Blue SL-e, Res 4/22/10, Ord 3/29/11, Del 7/30/11
110,000 Miles.
Lost 5 Capacity bars
7/18/13 (29,206), 8/25/14 (51,728), 7/12/15 (71.108), 5/12/16 (88,362), 10/17/16 (96,532)
New Battery 12/3/16 (98,956)

Stoaty
Posts: 4478
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

Thu May 31, 2012 7:15 pm

Ingineer wrote:LEAFSCAN can read the battery ECU's internal capacity loss numbers, including internal resistance, and can also tell if it's only one or 2 modules, or just a general loss across the whole pack. The capacity loss coefficient that can only be read by LEAFSCAN is what the capacity bars are based on. This can be done at any SoC and any temperature. No need to charge to check, it takes only seconds.

I am drooling at the thought of getting the LEAFSCAN! :D
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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TonyWilliams
Posts: 10090
Joined: Sat Feb 19, 2011 1:48 am
Location: San Diego
Contact: Website

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

Thu May 31, 2012 8:13 pm

Ingineer wrote:
TonyWilliams wrote:You dont need a LEAFSCAN to check the count of wattHours with a Gidmeter. There are dozens and dozens of these out there, and I'm sure you can find somebody who will loan you one in a major California city (I have no idea where you are).
While you can get an approximation with a full charge, Since Gids at full charge are variable, you can't get a very accurate number, in addition, factors such as a hot/cold pack or a imbalance can cause an artificially low gid reading temporarily. You also have to perform a full charge in order to check.

LEAFSCAN can read the battery ECU's internal capacity loss numbers, including internal resistance, and can also tell if it's only one or 2 modules, or just a general loss across the whole pack. The capacity loss coefficient that can only be read by LEAFSCAN is what the capacity bars are based on. This can be done at any SoC and any temperature. No need to charge to check, it takes only seconds.

-Phil


Phil, I think we are all going to be thrilled with the final product. Get back to work so I can have a LEAFSCAN before I drive to Canada!

smkettner
Posts: 7337
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

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

Thu May 31, 2012 10:50 pm

I think we are clammering for a Leafscan Basic to tide us over while Leafscan Plus is completed.
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV
RAV4 traded in for I-Pace Dec 2018

ztanos
Posts: 808
Joined: Mon Apr 30, 2012 7:31 pm
Location: Canton, Ga
Contact: AOL

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

Fri Jun 01, 2012 6:37 am

I'm over 9000 waiting for my Leafscan.

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