Boomer23
Well-known member
I've wanted to fully document the battery readings for my 2013 LEAF between LBW and Turtle ever since I did my previous two Turtle runs.
I'm planning a 120 mile drive (each way) to Ventura and back from Orange County, and I wanted a better guide for the usefulness of the various readouts in my particular car. Some others may find this data useful.
As background, I have a 2013 LEAF SL with a manufacture date of May, 2013. The car was delivered June 15, has been in use for two and a half months, has 2,445 miles on it and has been taken to Turtle two previous times. It is usually charged to 80%, but it is charged to 100% about every 10 days.
In the two previous Turtle runs, I reported that the car behaved as if it has a charge reserve of a few kWh below 10 Gids. In both previous tests, I was able to drive several miles per Gid on the last few Gids before Turtle, with perhaps 7 miles of range possible between 10 Gids and 5 Gids (Turtle). I don't think for a minute that the battery has extra capacity, I just think that more of the charge resides below VLBW and below 10 Gids than on my 2011 LEAF and almost all other LEAFs that I've read about here. The exception is stjohnh, who has documented similar behavior at low SOC in his LEAF of May 2013 manufacture.
http://www.mynissanleaf.com/viewtopic.php?f=31&t=13776" onclick="window.open(this.href);return false;
Note that some significant differences have been reported between the early 2013 packs and those found in LEAFs that were built in May 2013. The two differences that I know of are lower AH and Health readings from the LBA in the May-build LEAFs and this unexpected Gid reading behavior at low SOC. Could we May 2013 LEAF drivers be experiencing the new "warm battery", as I call it?
I happened to drive my car down to LBW this evening, so I decided to do a Turtle run and to document as much data as I could from the LEAF Battery App (LBA), the original Gidmeter, and the LEAF's dash readings.
In the chart below, I document the data that I recorded.
Method: Car had been driven 72 miles during the day at an efficiency of 4.1 mi/kWh. Pack was warm at 96.6 deg F at beginning of Turtle run. The day was hot for this region, high temp of 90 deg F. Beginning at LBW, 49 Gids, I re-set a trip odometer and one of the mi/kWh efficiency meters. I drove the car in a suburban setting at approx indicated 4.0 mi/kWh with headlights on, in D or B mode, some radio use, until I reached Turtle mode. I recorded data from the LEAF's main dash (odometer, SOC%, GOM), Center dash display (efficiency mi/kWh), Gidmeter (verified Gids at LBW, VLBW, 10 Gids and Turtle), and LEAF Battery Android App (LBA, v0.26c) (Gids, KWh remaining, Wh used, SOC%, Range remaining at 4.1 mi/kWh, Volts and milllivolt differential, Highest pack temperature (F))
Some conclusions:
--Gid readings from the LBA agreed exactly with Gid readings from the Original Gidmeter.
--Range from LBW (49 Gid) to Turtle was 20.2 miles at an indicated efficiency of 4.0 mi/kWh
--Predicted range from LBW from GOM of 17 miles compares fairly well with actual range of 20.2 miles
--The SOC% on the LEAF dash tracked % Gids closely until the dash display went to --- below 6% SOC
--Actual driven Range between 10 Gids and 5 Gids (Turtle) was 5.5 miles, making Gid readings at these low levels misleadingly pessimistic
--Reading the LBA's Remaining kWh display was equally misleading as Gid readings, with 5.5 miles of actual driven range between 0.8 and 0.4 kWh Remaining
--The only display that was a useful and continuous predictor of remaining range at low SOC was the LBA's SOC%, with Turtle occurring at 1.4% SOC.
Data:
I'm planning a 120 mile drive (each way) to Ventura and back from Orange County, and I wanted a better guide for the usefulness of the various readouts in my particular car. Some others may find this data useful.
As background, I have a 2013 LEAF SL with a manufacture date of May, 2013. The car was delivered June 15, has been in use for two and a half months, has 2,445 miles on it and has been taken to Turtle two previous times. It is usually charged to 80%, but it is charged to 100% about every 10 days.
In the two previous Turtle runs, I reported that the car behaved as if it has a charge reserve of a few kWh below 10 Gids. In both previous tests, I was able to drive several miles per Gid on the last few Gids before Turtle, with perhaps 7 miles of range possible between 10 Gids and 5 Gids (Turtle). I don't think for a minute that the battery has extra capacity, I just think that more of the charge resides below VLBW and below 10 Gids than on my 2011 LEAF and almost all other LEAFs that I've read about here. The exception is stjohnh, who has documented similar behavior at low SOC in his LEAF of May 2013 manufacture.
http://www.mynissanleaf.com/viewtopic.php?f=31&t=13776" onclick="window.open(this.href);return false;
Note that some significant differences have been reported between the early 2013 packs and those found in LEAFs that were built in May 2013. The two differences that I know of are lower AH and Health readings from the LBA in the May-build LEAFs and this unexpected Gid reading behavior at low SOC. Could we May 2013 LEAF drivers be experiencing the new "warm battery", as I call it?
I happened to drive my car down to LBW this evening, so I decided to do a Turtle run and to document as much data as I could from the LEAF Battery App (LBA), the original Gidmeter, and the LEAF's dash readings.
In the chart below, I document the data that I recorded.
Method: Car had been driven 72 miles during the day at an efficiency of 4.1 mi/kWh. Pack was warm at 96.6 deg F at beginning of Turtle run. The day was hot for this region, high temp of 90 deg F. Beginning at LBW, 49 Gids, I re-set a trip odometer and one of the mi/kWh efficiency meters. I drove the car in a suburban setting at approx indicated 4.0 mi/kWh with headlights on, in D or B mode, some radio use, until I reached Turtle mode. I recorded data from the LEAF's main dash (odometer, SOC%, GOM), Center dash display (efficiency mi/kWh), Gidmeter (verified Gids at LBW, VLBW, 10 Gids and Turtle), and LEAF Battery Android App (LBA, v0.26c) (Gids, KWh remaining, Wh used, SOC%, Range remaining at 4.1 mi/kWh, Volts and milllivolt differential, Highest pack temperature (F))
Some conclusions:
--Gid readings from the LBA agreed exactly with Gid readings from the Original Gidmeter.
--Range from LBW (49 Gid) to Turtle was 20.2 miles at an indicated efficiency of 4.0 mi/kWh
--Predicted range from LBW from GOM of 17 miles compares fairly well with actual range of 20.2 miles
--The SOC% on the LEAF dash tracked % Gids closely until the dash display went to --- below 6% SOC
--Actual driven Range between 10 Gids and 5 Gids (Turtle) was 5.5 miles, making Gid readings at these low levels misleadingly pessimistic
--Reading the LBA's Remaining kWh display was equally misleading as Gid readings, with 5.5 miles of actual driven range between 0.8 and 0.4 kWh Remaining
--The only display that was a useful and continuous predictor of remaining range at low SOC was the LBA's SOC%, with Turtle occurring at 1.4% SOC.
Data:
Code:
------------------Data from LEAF Battery App--------------
Miles %SOC Dash Gids %Gids kWh Wh used SOC% Range Volts/range mi/kWh GOM High pack Warnings
Remain Remain LCD mi Temp (F)
@ 4.1
mi/kWh
0 18 49 17.4 3.9 0 25.4 11.5 3.788 / 14 --- 17 96.6 LBW
2.1 15 42 14.9 3.4 594 22.8 9.2 3.758 / 14 3.5 14 96.2
4.4 13 36 12.8 2.9 1,148 20.3 7.2 3.738 / 12 3.9 12 96.0
6.6 10 30 10.7 2.4 1,730 17.7 5.2 3.725 / 10 3.9 9 96.0
9.2 8 24 8.5 1.9 2,430 14.6 3.3 3.700 / 15 3.9 --- 96.2 VLBW
11.3 7 19 6.8 1.5 2,906 12.4 1.6 3.677 / 20 4.0 --- 96.2
12.5 6 17 6.0 1.4 3,187 11.2 1.0 3.652 / 34 4.0 --- 96.4
13.8 --- 13 4.6 1.0 3,479 9.9 0.0 3.608 / 48 4.1 --- 96.4
14.7 --- 10 3.6 0.8 3,679 9.0 0.0 3.572 / 49 4.1 --- 96.4
15.9 --- 8 2.8 0.6 4,006 7.5 0.0 3.504 / 61 4.1 --- 96.6
16.7 --- 7 2.5 0.6 4,226 6.5 0.0 3.451 / 70 4.1 --- 96.8
17.6 --- 7 2.5 0.6 4,579 5.0 0.0 3.355 / 83 4.1 --- 96.8
18.5 --- 6 2.1 0.5 4,915 3.5 0.0 3.246 / 96 4.0 --- 97.2
20.0 --- 6 2.1 0.5 5,339 1.6 0.0 3.084 / 120 4.0 --- 97.5
20.2 --- 5 1.8 0.4 5,366 1.4 0.0 3.081 / 120 4.0 --- 97.7 Turtle
