roperld
Posts: 77
Joined: Mon Feb 06, 2012 7:54 am
Delivery Date: 07 May 2012
Leaf Number: 019536
Location: Blacksburg VA
Contact: Website

Lizard battery capacity

Thu Sep 03, 2015 11:10 am

I have the Gid meter that I used to use with my leased 2012 LEAF. Now I have leased the 2015 LEAF for 2 years.

When I charge the 2015 LEAF and the LEAF SOC shows 100%, the Gid meter shows 103.9% maximum. What does that mean?
Leased for 3 years on 5 May 2012 a Cayenne-Red 2012 LEAF SL http://www.roperld.com/science/LEAFRoper.pdf
http://www.roperld.com/science/ElectricCarsMusings.pdf
Leased for 2 years on 3 Mar 2015 a Pearl-White 2015 LEAF SV

edatoakrun
Posts: 5222
Joined: Thu Nov 11, 2010 9:33 am
Delivery Date: 15 May 2011
Leaf Number: 2184
Location: Shasta County, North California

Re: Lizard battery capacity

Thu Sep 03, 2015 11:15 am

no condition is permanent

User avatar
GeekEV
Posts: 1825
Joined: Tue Jan 18, 2011 4:11 pm
Delivery Date: 15 Feb 2011
Leaf Number: 0308
Location: NorCal, USA

Re: Lizard battery capacity

Thu Sep 03, 2015 6:55 pm

It seems likely that different battery chemistry would give different readings. Since the % number is interpolated from other numbers, the software in the gid meter probably needs an update. But I'm totally guessing here, since I've never had a gid meter and don't even have my LEAF anymore.

P.S. Did you mean you've leased the 2015 for 2 MONTHS not 2 YEARS? That would be quite a feat...

2014 Chevy Spark EV 2LT
2013 Tesla Model S 60kWh[/url]
AV L2 EVSE + kWh meter
9.4kW Solar Array + enphase energy

GerryAZ
Gold Member
Posts: 2632
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Lizard battery capacity

Thu Sep 03, 2015 10:49 pm

The Gidmeter reads a value from the CAN bus that represents the amount of energy stored in the battery which is not quite the same as state of charge (SOC). The Gidmeter was programmed to display 100% for 281 which was the highest number that was typically read from the CAN bus on fully-charged 2011 (and 2012) Leafs with little or no battery deterioration. I am not sure about 2013 and 2014 models, but my 2015 typically displays 292 (or 103.9%) when fully charged and once or twice it hit 293 (or 104.3%).

The SOC display in the dash on the 2015 is scaled to display 100% when the Leaf is fully charged. SOC is a percentage of the maximum energy the battery can store in its present condition. This means it will display 100% even if the battery capacity has dropped. With a fully-charged battery that has 80% of new capacity, the dash would display 100% on a 2015, but the Gidmeter would display 83.1% (80% of 103.9%).

Gerry
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

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