Inventor71
Posts: 1
Joined: Thu Jan 10, 2019 9:49 am
Delivery Date: 10 Jan 2019

Battery Upgrades are very possible

Fri Jan 18, 2019 9:42 am

I have read a lot of post on this forum and I can say with confidence that battery upgrades are very probable. Going from a 24KW to a 30 KW is nothing more than creating a emulator / translator between the CAN bus and the battery. There are a lot of people on this forum that have mapped and documented the CAN interface. It also looks like the hardware interface can also designed on this forum or somebody could make a hardware device and make a pretty decent profit.

The reason for this post is to tell people a battery upgrade is very possible. Is Nissan going to do it? Hell NO. That effects their profit margin. I have 2013 Nissan Leaf SV with 11 bars, when it gets to 9 or 8 bars the car will be paid off and its very possible I would consider a bigger battery ( at which time may be bigger than 30KW ) instead of buying the same battery. Yes a 30KW battery may be around 6K on copart.com but 6K is better than 30K for a new leaf.

The CAN bus has been documented pretty well, I am working on completely changing the infotainment system so it can have a new look every time a new firmware comes out and gives the car a new look and feel from the drivers point of view.

The mechanical parts of the car can last pretty much forever if maintained properly. I had a 2002 Dodge Durango before the Leaf and it had the worst reliability score at the time. By doing the maintenance properly I put 300,000 miles with zero issues other than typical maintenance. There is no reason the Leaf should a major failure other than the battery. There is not any wearable parts in the drive train other typical stuff (brake pads, tires).

DaveinOlyWA
Posts: 13835
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Battery Upgrades are very possible

Fri Jan 18, 2019 10:26 am

Let us know when you have progressed beyond the talking stage.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 15,000 miles, 478 GIDs, 37.0 kwh 109.81 Ahr , SOH 94.61, Hx 120.15
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

OakLeaf
Posts: 114
Joined: Tue Dec 11, 2012 1:00 pm
Delivery Date: 21 Nov 2012
Location: Telford, PA

Re: Battery Upgrades are very possible

Fri Jan 18, 2019 10:49 am

In case you haven't already seen it, "Mux" has been working on this sort of device:

http://mynissanleaf.com/viewtopic.php?f=8&t=6522&start=390

He's added on a battery pack to his LEAF and I think is looking to do replacement packs as well with a startup he's formed.

Fenix Power is also possibly taking this approach with thier battery pack replacement:

http://mynissanleaf.com/viewtopic.php?f=27&t=26597
2012 Leaf SL - 64K miles since 11/2012 - No P3227 Update - 8 Bars / 41.2AHr / SOH 63% / Hx 55%

gugusse
Posts: 25
Joined: Thu Jun 01, 2017 6:54 am
Delivery Date: 06 May 2017
Location: France

Re: Battery Upgrades are very possible

Sun Jan 20, 2019 2:39 am

I remember a post here of somebody whom replaced his 24kWh pack with a 30kWh but he had to replace 2other part (one behind the glove box and one under the hood) and I think a dealership had to pair them.... Still good to know!

cwerdna
Posts: 9250
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Battery Upgrades are very possible

Sun Jan 20, 2019 3:38 am

Inventor71 wrote:Going from a 24KW to a 30 KW is nothing more than creating a emulator / translator between the CAN bus and the battery.

... at which time may be bigger than 30KW )

Your post would have a lot more credibility if you used the right units.

The proper units in this context are kWh, not "KW". See http://www.mynissanleaf.com/viewtopic.p ... 45#p540845.

Someone pointed to this video by Bjorn: https://www.youtube.com/watch?v=O0lyqrgQJFk. Apparently, he's made another on this subject which I haven't watched.

24 and 30 kWh (battery size) Leafs have 80 kW motors.
Last edited by cwerdna on Thu Jan 24, 2019 9:17 pm, edited 1 time in total.

'19 Bolt Premier
'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

TexasLeaf
Posts: 103
Joined: Wed Mar 21, 2018 5:37 am
Delivery Date: 17 Mar 2018
Leaf Number: 303111
Location: Texas

Re: Battery Upgrades are very possible

Thu Jan 24, 2019 10:09 am

Sad to say but there should be wrecked Leafs with 40 kWh packs available soon. It’s about time for people to start trying to get 40 kWh packs in older Leafs. I will be looking at sticking a 62 kWh pack in my Leaf when the pack degrades out of warranty.
2018 Leaf SL
2015 Ford Fusion Energi Titanium
2007 GMC Envoy XL SLT 4X4

Dooglas
Posts: 277
Joined: Thu Apr 03, 2014 10:08 pm
Delivery Date: 04 Jan 2017
Leaf Number: 314779
Location: Oregon City, OR

Re: Battery Upgrades are very possible

Sat Jan 26, 2019 11:44 am

TexasLeaf wrote:I will be looking at sticking a 62 kWh pack in my Leaf when the pack degrades out of warranty.

A lot of people might be "looking" at that alternative. Is there any indication that anyone will be doing it?
2013 Leaf SV - lease ended, 2016 Leaf S30 - purchased

DaveinOlyWA
Posts: 13835
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Feb 2018
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Battery Upgrades are very possible

Sat Jan 26, 2019 12:34 pm

Post on u tube of Russians reputedly (if you can understand Russian, you can verify) replaced 24 kwh pack with 40 kwh pack successfully.
But no English, no value to me... Oh wait!! I forgot, I already have a 40 kwh pack. That might have played a part as well. 8-)
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 15,000 miles, 478 GIDs, 37.0 kwh 109.81 Ahr , SOH 94.61, Hx 120.15
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

Reagle
Posts: 55
Joined: Wed Apr 11, 2018 8:05 pm
Delivery Date: 25 Jun 2018
Location: Upstate New York

Re: Battery Upgrades are very possible

Sun Jan 27, 2019 8:25 pm

I've actually been watching videos by these guys with an EV service shop in Ukraine who did a bunch of Leaf related transplants. Btw, Youtube does somewhat decent job autotranslating with captions. You'll miss all the fun of the original sayings, but at least some meaning will come through. Lots of very good technical info on our cars there. They do all kinds of repairs with zero support from Nissan since they don't even sell Leafs there.

The channel is at https://www.youtube.com/channel/UCi8nlJ ... 5EXR4wqMoA

Their latest project is taking 40kwh pack from a wrecked 2018 and putting it into a 2014 I think 24kwh Leaf.
https://www.youtube.com/watch?v=GtGOZvpa6Ks
https://www.youtube.com/watch?v=u6tDOHXxukY

they went through a bunch of various combinations - moving packs as is, moving VCM, but all they got was a turtle mode operation
Then in part2 they kinda succeeded by transplanting a bunch of 24kwh guts into the 40kwh pack- contactors, current sensor, main battery controller and even pack heaters. The car drove but BMS had no idea that pack capacity was higher than 60AH. So it would display --- instead of range, and go into turtle mode after 200 something km. So they basically hit the wall since BMS does not learn that far up. Next steps are modifying settings in firmware but since it's read protected that was something they did not yet have a way to do

Keep in mind it's a fully equipped shop, with Nissan diagnostic tools etc.
the same guys also swapped a 30kwh pack into a 24kwh leaf of a similar vintage and that did work.

I do speak the language, so could help somewhat with translation questions
2018 Jade Frost SV with tech and weather packages
Delivery: 06/2018
Build date: 03/2018

Oilpan4
Gold Member
Posts: 510
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Battery Upgrades are very possible

Mon Jan 28, 2019 2:39 am

Reagle wrote:I've actually been watching videos by these guys with an EV service shop in Ukraine who did a bunch of Leaf related transplants. Btw, Youtube does somewhat decent job autotranslating with captions. You'll miss all the fun of the original sayings, but at least some meaning will come through. Lots of very good technical info on our cars there. They do all kinds of repairs with zero support from Nissan since they don't even sell Leafs there.

The channel is at https://www.youtube.com/channel/UCi8nlJ ... 5EXR4wqMoA

Their latest project is taking 40kwh pack from a wrecked 2018 and putting it into a 2014 I think 24kwh Leaf.
https://www.youtube.com/watch?v=GtGOZvpa6Ks
https://www.youtube.com/watch?v=u6tDOHXxukY

they went through a bunch of various combinations - moving packs as is, moving VCM, but all they got was a turtle mode operation
Then in part2 they kinda succeeded by transplanting a bunch of 24kwh guts into the 40kwh pack- contactors, current sensor, main battery controller and even pack heaters. The car drove but BMS had no idea that pack capacity was higher than 60AH. So it would display --- instead of range, and go into turtle mode after 200 something km. So they basically hit the wall since BMS does not learn that far up. Next steps are modifying settings in firmware but since it's read protected that was something they did not yet have a way to do

Keep in mind it's a fully equipped shop, with Nissan diagnostic tools etc.
the same guys also swapped a 30kwh pack into a 24kwh leaf of a similar vintage and that did work.

I do speak the language, so could help somewhat with translation questions

I thought that was their original plan.
Take a 24kwh pack, gut it, repack it with 40kwh pack modules. Or wire up a 40kwh battery with 24kwh battery guts.
Yeah it looked like swapping the 24kwh stuff over to the 40kwh battery was the way to go.
But if simply swapping a pack, vcm or bms would work, might as well try it and confirm or rule it out for sure one way or the other (like he did when putting a 30kwh pack and 30kwh cars' vcm in a 2011 last year and got it to work) .

I would call going 217 km with a 40kwh pack before going turtle a success.
I'm not sure how he will convince the gen 1 pack that it has more than the standard 24kwh stuff available for power.

It looked like in that last test on part 2 it displayed range with the 40kwh pack, but it looked like 24kwh range?

If the car was given 40kwh batteries wired up with 24kwh battery electronics and showed range wouldn't the car eventually learn that it has much more range than normal?
2011 white SL leaf with 2014 batt.
Chargers: Panasonic brick moded for 240v, duosida 16a 240v and a 10kw setec portable CHAdeMO
Location: 88103

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