Reddy
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Leaf Number: 006828
Location: Pasco, WA

Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Thu Jan 26, 2012 7:29 pm

Awesome! The Cold 100 Club!
Reddy
2011 SL; 9 bar, 45.80 AHr; 45,000 mi; rcv'd Aug 18, 2011
Long: http://www.mynissanleaf.com/viewtopic.p ... al#p226115"
Cold: http://www.mynissanleaf.com/viewtopic.p ... 60#p243033"

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TonyWilliams
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Location: San Diego
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Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Fri Jan 27, 2012 1:56 am

DaveinOlyWA wrote: x
100.1 miles / 5.3 miles per kWh = 18.88kWh burned. This is almost identical to my trip from Long Beach to San Diego where I drove exactly 100 miles at 5.1, driving in the garage in Turtle. My ambient temp was a bit higher, in the 50F's.

Ambient air 38F - 43F

LB - 11.9 miles until
VLB - 6.6 miles until

Ration LBW to VLB - 55%


Truly great data ! Please shoot me an email at TonyWilliams at LoveMyLEAF daught com with your shipping address, shirt size (S, M, L, XL) and color (Blue or Yellow).

So, let's see how this data fits.

Model 1 of "1% loss per 4F below 21kWh capacity at 70F":

Assumed battery temp of 40F is a 30F delta from 70F, therefore 30 / 4 = 7.5% reduction in battery.

7.5% of 21kWh = 19.42kWh

Model 2, "1% loss per 4F below 20kWh at 70F"

70-40 = 30 / 4 = 7.5% * 20kWh = 18.5kWh

Model 3, "1% loss per 4F below 20.5kWh at 75F"

75-40 = 35 delta / 4 = 8.75% * 20.5kWh = 17.95kWh
Last edited by TonyWilliams on Fri Jan 27, 2012 2:30 pm, edited 1 time in total.

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abasile
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Delivery Date: 20 Apr 2011
Location: Arrowbear Lake, CA

Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Fri Jan 27, 2012 9:08 am

DaveinOlyWA wrote:Image
Dave, do you know when you gained the fifth battery temperature bar? Over the course of that 100 miles, it seems that the average battery temperature was likely higher than 40°F. Knowing the point at which you gained the fifth temperature bar might give us a clue.

As a side note, we just had an interesting day in terms of battery temperature. We started down the mountain with four battery temperature bars, ambient temp in the low 40s, and a bit less than 80% charge after preheating while unplugged. The LEAF gained the fifth temperature bar near the bottom of our 5000' descent due to heat from regen, then went up to six temperature bars while charging to 100% near our destination 50+ miles away. This shouldn't be surprising, though, as the LEAF was parked in the sun near our destination while charging, with an ambient temperature of about 80°F. Still, the pack went from four temperature bars to six bars within the space of several hours, not an everyday occurrence!
2011 LEAF at 71K miles, pre-owned 2012 Tesla S 85 at 98K miles
LEAF battery: 9/12 bars and < 49 Ah (-28% vs. new)
Tesla battery: 250+ miles of range (-5% vs. new)

DaveinOlyWA
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Leaf Number: 319862
Location: Olympia, WA
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Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Fri Jan 27, 2012 12:40 pm

Had not noticed the Barry bar until you mentioned it. During stops I went from 98 GID to 102 while stuffing sushi in my face. Air temps were 43-44 but it was full sun. The car itself was plenty warm enough that there was no need for heat to the point that I did not even zip up my coat. Wondering if that is why because I have seen temps higher that still left me st 4 bars
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; 19,653 mi, 93.47% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

DaveinOlyWA
Posts: 15593
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Fri Jan 27, 2012 12:42 pm

5.3 miles per K
TonyWilliams wrote:
DaveinOlyWA wrote: x
100.1 miles / 5.1 miles per kWh = 18.88kWh burned. This is almost identical to my trip from Long Beach to San Diego where I drove exactly 100 miles at 5.1, driving in the garage in Turtle. My ambient temp was a bit higher, in the 50F's.

Ambient air 38F - 43F

LB - 11.9 miles until
VLB - 6.6 miles until

Ration LBW to VLB - 55%


Truly great data ! Please shoot me an email at TonyWilliams at LoveMyLEAF daught com with your shipping address, shirt size (S, M, L, XL) and color (Blue or Yellow).

So, let's see how this data fits.

Model 1 of "1% loss per 4F below 21kWh capacity at 70F":

Assumed battery temp of 40F is a 30F delta from 70F, therefore 30 / 4 = 7.5% reduction in battery.

7.5% of 21kWh = 19.42kWh

Model 2, "1% loss per 4F below 20kWh at 70F"

70-40 = 30 / 4 = 7.5% * 20kWh = 18.5kWh

Model 3, "1% loss per 4F below 20.5kWh at 75F"

75-40 = 35 delta / 4 = 8.75% * 20.5kWh = 17.95kWh
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; 19,653 mi, 93.47% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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evnow
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Leaf Number: 303
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Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Fri Jan 27, 2012 2:26 pm

DaveinOlyWA wrote:LB @17.4 & 49 80.8
VLB @ 8.5 & 24 and 92.7
lost first power circle @ 98.8 miles
turtle @ 2.8 and 8 and 99.3
Nearly 20 miles from LB. That is great.
1st Leaf : 2/28/2011 to 5/6/2013
2nd Leaf : 5/4/2013 to 3/21/2017
Volt : 3/25/2017 to 5/25/2018
Model 3 : 5/10/2018 to ?

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TonyWilliams
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Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Fri Jan 27, 2012 2:33 pm

evnow wrote:
DaveinOlyWA wrote:LB @17.4 & 49 80.8
VLB @ 8.5 & 24 and 92.7
lost first power circle @ 98.8 miles
turtle @ 2.8 and 8 and 99.3
Nearly 20 miles from LB. That is great.
The best I've done is 22 miles, and the Edmonds.com run of 132 miles was 26 miles (16/10).

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TonyWilliams
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Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Fri Jan 27, 2012 2:36 pm

DaveinOlyWA wrote:5.3 miles per K
I got the math right, and confused your 5.3 for my 5.1. By the way, that trip I made was right at 5.3 and 45mph the whole until I needed the darn heater at the end. 100 miles, though, but with some pretty agressive hyper idling the last several miles to offset the heater.

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evnow
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Delivery Date: 25 Feb 2011
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Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Fri Jan 27, 2012 7:19 pm

TonyWilliams wrote:100.1 miles / 5.1 miles per kWh = 18.88kWh burned. This is almost identical to my trip from Long Beach to San Diego where I drove exactly 100 miles at 5.1, driving in the garage in Turtle. My ambient temp was a bit higher, in the 50F's.
...
So, let's see how this data fits.

Model 1 of "1% loss per 4F below 21kWh capacity at 70F":

Assumed battery temp of 40F is a 30F delta from 70F, therefore 30 / 4 = 7.5% reduction in battery.

7.5% of 21kWh = 19.42kWh
When I did my calculation last time in June (http://www.mynissanleaf.com/viewtopic.php?f=31&t=4344" onclick="window.open(this.href);return false;), I got 20.9 kWh and boomer's data showed 21.1 kwh. We should consolidate to see if there is more data pointing to 21 kWh.

If we assume 21 kWh - from Dave's data we get a loss of 21-18.9 = 2.1 kWh for 30 degrees, a 10% loss.

So, may be the rule could be "1% loss per 3F below 21kWh capacity at 70F".

I don't know how well that fits your other data points.
1st Leaf : 2/28/2011 to 5/6/2013
2nd Leaf : 5/4/2013 to 3/21/2017
Volt : 3/25/2017 to 5/25/2018
Model 3 : 5/10/2018 to ?

DaveinOlyWA
Posts: 15593
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Wanted: Extreme Cold Range Data (earn free t-shirt!)

Fri Jan 27, 2012 9:07 pm

FYI; 23 K's to recharge! started 5:20 PM finished 1:18 am

7 hours 58 mins to charge. not bad!
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; 19,653 mi, 93.47% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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