Bouldergramp
Posts: 77
Joined: Mon Oct 15, 2018 10:36 am
Delivery Date: 15 Oct 2018
Leaf Number: 317621
Location: COLORADO

Boulder to Denver at 90 mph

Mon Aug 17, 2020 1:47 pm

Yesterday evening my Audi loving daughter drove my wife and me a total of 60 miles to Denver and back in our 2018 Leaf. Denver traffic on I-25 in the left lanes where we were was moving at a pretty good clip. Only a few motorcycles and fast cars and pickups passed us. From the back seat I noticed the speedometer was right at 90 mph. When we got home the battery, which started out fully charged, was at 59% with an estimated 96 miles remaining. The AC was set at 68 deg and the outside air temperature was in the mid 80's.

It was an interesting first trip on an interstate. We didn't drive the entire trip at 90 but I don't think she ever got down to the posted speed limits.

salyavin
Posts: 184
Joined: Thu Sep 26, 2019 9:51 pm
Delivery Date: 30 Dec 2019
Leaf Number: 318726
Location: Littleton , CO

Re: Boulder to Denver at 90 mph

Mon Aug 17, 2020 2:23 pm

Nice, wecome to the LEAF family. As you can probably imagine there are quite a few around the Denver and Boulder area. We have EV groups in Denver and Colorado Springs if you wanted to talk to other EV drivers locally. Colorado Springs has weekly zoom meetings these days.

The car as you saw uses a lot more power to do a higher speed and the battery will gain a little bit of heat but nothing to worry about for that distance. I only maxed the car out once I think it was somewhere around 100mph so while the acceleration is not bad the cars top end speed is not noteworthy.

There is a lot of speculation on weather charging to 100% is good for the car, some think between 20-80 percent may extend battery life. Just thought I'd mention that idea.

You may be surprised but you can go to a lot of the state in your LEAF with the fast charger network that has been getting built out. I was just camping outside Telluride last week as an example. I recommend something like https://abetterrouteplanner.com/ to help you plan your trips if you ever want to leave the metro area in your LEAF as well as plugshare to see how people have done at chargers you plan to use.

alozzy
Posts: 1568
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Boulder to Denver at 90 mph

Mon Aug 17, 2020 9:28 pm

The thinner air in Denver definitely helps, driving at that speed at sea level would have chewed up considerably more battery charge.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

lorenfb
Posts: 2464
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Boulder to Denver at 90 mph

Tue Aug 18, 2020 6:35 am

Bouldergramp wrote:
Mon Aug 17, 2020 1:47 pm
Yesterday evening my Audi loving daughter drove my wife and me a total of 60 miles to Denver and back in our 2018 Leaf. Denver traffic on I-25 in the left lanes where we were was moving at a pretty good clip. Only a few motorcycles and fast cars and pickups passed us. From the back seat I noticed the speedometer was right at 90 mph. When we got home the battery, which started out fully charged, was at 59% with an estimated 96 miles remaining. The AC was set at 68 deg and the outside air temperature was in the mid 80's.

It was an interesting first trip on an interstate. We didn't drive the entire trip at 90 but I don't think she ever got down to the posted speed limits.
Let's "cook" that Leaf battery, right? Did you check your battery temperature after that drive? Remember, the Leaf lacks TMS (battery cooling),
i.e. it's not an Audi, Bolt, or a Tesla where one can drive as if it were an ICEV.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

salyavin
Posts: 184
Joined: Thu Sep 26, 2019 9:51 pm
Delivery Date: 30 Dec 2019
Leaf Number: 318726
Location: Littleton , CO

Re: Boulder to Denver at 90 mph

Tue Aug 18, 2020 11:05 am

for that distance of drive it is fine at 90mph out here. Waste of charge but will not build up enough heat to cook the battery. It's really the DCFCs that get you as it can't get rid of heat as you know but they didn't need that. Remember 30 miles there and 30 miles back.

lorenfb
Posts: 2464
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Boulder to Denver at 90 mph

Tue Aug 18, 2020 5:21 pm

salyavin wrote:
Tue Aug 18, 2020 11:05 am
for that distance of drive it is fine at 90mph out here. Waste of charge but will not build up enough heat to cook the battery. It's really the DCFCs that get you as it can't get rid of heat as you know but they didn't need that. Remember 30 miles there and 30 miles back.
So you've checked the battery temperature after a lengthy drive at 90 MPH with the AC on with a 10-15 degree temp differential, right?
Or are you just guessing, if not provide your temperature readings using LeafSpy. Also, are you claiming like some that a moving Leaf
can reduce the battery's temperature, if so fully example how that can occur. So given your inference, TMS is only necessary when QCing,
and neither ambient temperatures nor temperature rises due to motor currents require TMS, right?
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

alozzy
Posts: 1568
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Boulder to Denver at 90 mph

Tue Aug 18, 2020 6:23 pm

LOL, the 3rd degree burn - guess that's what you get for sharing a simple story about driving a LEAF on the highway.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

DougWantsALeaf
Posts: 1970
Joined: Fri May 10, 2013 8:21 pm
Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Boulder to Denver at 90 mph

Tue Aug 18, 2020 6:36 pm

I would like to efficiency test my S+ in Denver or Springs to see how much the thinner air helps.
2019 S Plus (97.98% SOH) & 2019 SV Plus (94.84% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh

SageBrush
Posts: 5155
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Boulder to Denver at 90 mph

Tue Aug 18, 2020 6:42 pm

lorenfb wrote:
Tue Aug 18, 2020 5:21 pm
salyavin wrote:
Tue Aug 18, 2020 11:05 am
for that distance of drive it is fine at 90mph out here. Waste of charge but will not build up enough heat to cook the battery. It's really the DCFCs that get you as it can't get rid of heat as you know but they didn't need that. Remember 30 miles there and 30 miles back.
So you've checked the battery temperature after a lengthy drive at 90 MPH with the AC on with a 10-15 degree temp differential, right?
Or are you just guessing, if not provide your temperature readings using LeafSpy. Also, are you claiming like some that a moving Leaf
can reduce the battery's temperature, if so fully example how that can occur. So given your inference, TMS is only necessary when QCing,
and neither ambient temperatures nor temperature rises due to motor currents require TMS, right?
I had the same thought as you Loren but if he really did use 40% of the 40 kWh battery to travel 60 miles that works out to 266 Wh/mile. No way anything but a small part of the drive was much over 65 mph.

As you say, a 45 minute drive at 90 mph would cook the battery. I don't have the LEAF CdA handy but the Bolt Aero resistance is 800 Newton at 87 mph, equal to about 32 kW. The LEAF will be higher, and the other losses and AC are icing on the cake. Easily a CHAdeMO equivalent and without any taper :lol:
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

SageBrush
Posts: 5155
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Boulder to Denver at 90 mph

Tue Aug 18, 2020 6:51 pm

DougWantsALeaf wrote:
Tue Aug 18, 2020 6:36 pm
I would like to efficiency test my S+ in Denver or Springs to see how much the thinner air helps.
Look up the air density compared to sea level. I think it is ~ 15 - 20% less.
That sounds like a lot but at the speeds you drive Aero is ~ 1/3 of power, less if AC is used.
So around a 5- 7% improvement, less with AC
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

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