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

2018 LEAF, Capacity, Range and efficiency

Tue Jan 30, 2018 1:36 pm

Pushevs has published the first detailed report on actual capacity of the "40 kWh" pack:

2018 Nissan Leaf battery real specs

The specs of the battery cell used in the 2018 Nissan Leaf are pretty impressive.

The 2018 Nissan Leaf battery – like all previous versions – uses a 96s2p cell configuration, this means that in total there are 192 cells in the battery pack. However, the battery cells now have a much higher energy density.

In the Nissan Leaf, each battery pack has 24 modules and each module has 8 cells. Originally, the Nissan Leaf was launched with double the modules. The 24 kWh battery in the 2011 Nissan Leaf had 48 modules, each module with 4 cells. However, when Nissan released the 30 kWh battery, the number of modules was reduced to half – to further increase the energy density of the battery pack. If you look at the new battery module below you’ll see that it seems 2 old modules stuck together…

Now we can calculate the new battery real capacity:

192 x 3,65 V x 56,3 Ah = 39,46 kWh

And compare it to the original battery pack in the 2011 Nissan Leaf.

192 x 3,75 V x 32,5 Ah = 23,4 kWh...

https://pushevs.com/2018/01/29/2018-nis ... eal-specs/

Note that AVTA testing showed that by 2013 (unlike earlier years) the LEAF's "24 kWh" pack actually had over 24 kWh total capacity when new, so it is virtually certain there will be some variation from actual in that 39.46 kWh calculation.
no condition is permanent

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: 2018 LEAF, Capacity, Range and efficiency

Sun Feb 04, 2018 10:24 am

2018 pack dimensions and connections reported to be identical to 2011-17 LEAF packs:

https://www.youtube.com/watch?v=wOi8234tOQ4&t=1s
no condition is permanent

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RegGuheert
Posts: 6287
Joined: Mon Mar 19, 2012 4:12 am
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Leaf Number: 5926
Location: Northern VA

Re: 2018 LEAF, Capacity, Range and efficiency

Sun Feb 04, 2018 11:09 am

edatoakrun wrote:2018 pack dimensions and connections reported to be identical to 2011-17 LEAF packs:

https://www.youtube.com/watch?v=wOi8234tOQ4&t=1s
Thanks! Very cool!

He also showed that Nissan used electronic (electrical?) calipers on the rear wheels for the third iteration of the parking brake.

I had expected to see some room left behind the 40-kWh battery to allow for a larger pack when they start delivering the 60-kWh version. Unfortunately, it looks like there is a bit of space, but there are currently several things in there. I guess we'll have to wait to see what the 60-kWh version looks like.
RegGuheert
2011 Leaf SL Demo vehicle
10K mi. on 041413; 20K mi. (55.7Ah) on 080714; 30K mi. (52.0Ah) on 123015; 40K mi. (49.8Ah) on 020817; 50K mi. (47.2Ah) on 120717; 60K mi. (43.66Ah) on 091918.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

DaveinOlyWA
Posts: 13133
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: 2018 LEAF, Capacity, Range and efficiency

Sun Feb 04, 2018 11:21 am

Prelim LEAF Spy stats do not agree
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 8743 miles, 485 GIDs, 37.6 kwh 111.39 Ahr , SOH 96.49, Hx 114.98
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RegGuheert
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Location: Northern VA

Re: 2018 LEAF, Capacity, Range and efficiency

Sun Feb 04, 2018 11:26 am

DaveinOlyWA wrote:Prelim LEAF Spy stats do not agree
Prelim LEAF Spy stats do not agree with what? (Note that LEAF Spy does not report physical dimensions, which is what we have been discussing.)
RegGuheert
2011 Leaf SL Demo vehicle
10K mi. on 041413; 20K mi. (55.7Ah) on 080714; 30K mi. (52.0Ah) on 123015; 40K mi. (49.8Ah) on 020817; 50K mi. (47.2Ah) on 120717; 60K mi. (43.66Ah) on 091918.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

SageBrush
Posts: 2684
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: Colorado

Re: 2018 LEAF, Capacity, Range and efficiency

Sun Feb 04, 2018 11:36 am

Why does the original article use 3.65 volts for one model and 3.75 volts for the other ?
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Car is now enjoying an easy life in Colorado
3/2018: 58 Ahr, 28k miles
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OrientExpress
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Re: 2018 LEAF, Capacity, Range and efficiency

Sun Feb 04, 2018 11:56 am

RegGuheert wrote:Nissan used electronic (electrical?) calipers on the rear wheels for the third iteration of the parking brake


The electric calipers have more to do than just the parking brake. They also are instrumental in torque vectoring for enhanced handling. This is the same sort of thing that Porsche and other marques use to improve how the car drives.
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SageBrush
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Location: Colorado

Re: 2018 LEAF, Capacity, Range and efficiency

Sun Feb 04, 2018 12:01 pm

the article has a video attached where a Nissan guy at the end says "it has at least 40 kWh."
Is he talking about nominal, usable, or something else ?

And regarding Ahr per cell, I'm still unsure if the increase is from a bigger (heavier) cell or a chemistry change (or both.)
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Car is now enjoying an easy life in Colorado
3/2018: 58 Ahr, 28k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

DaveinOlyWA
Posts: 13133
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: 2018 LEAF, Capacity, Range and efficiency

Sun Feb 04, 2018 12:10 pm

RegGuheert wrote:
DaveinOlyWA wrote:Prelim LEAF Spy stats do not agree
Prelim LEAF Spy stats do not agree with what? (Note that LEAF Spy does not report physical dimensions, which is what we have been discussing.)


I would have to look it up but iirc the ahr rating was 113
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 8743 miles, 485 GIDs, 37.6 kwh 111.39 Ahr , SOH 96.49, Hx 114.98
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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RegGuheert
Posts: 6287
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: 2018 LEAF, Capacity, Range and efficiency

Sun Feb 04, 2018 12:10 pm

OrientExpress wrote:The electric calipers have more to do than just the parking brake. They also are instrumental in torque vectoring for enhanced handling. This is the same sort of thing that Porsche and other marques use to improve how the car drives.
Interesting! Are they also involved with the one-pedal driving system? I'm guessing they do. Do they exist on the front calipers, as well?

If they are similar to the electrical calipers used on the Boeing 787 in that they eliminate hydraulic fluid, then I must say that's a great improvement! Hopefully they don't cost an absolute fortune like those on the 787.
RegGuheert
2011 Leaf SL Demo vehicle
10K mi. on 041413; 20K mi. (55.7Ah) on 080714; 30K mi. (52.0Ah) on 123015; 40K mi. (49.8Ah) on 020817; 50K mi. (47.2Ah) on 120717; 60K mi. (43.66Ah) on 091918.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

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