The 40KWH Battery Topic

[SageBrush]

Thank. Where can I read this information (about the inability to replace the batteries) from the official Nissan? Give me a link.

You should get a clue.
Companies say what they will support, and what they will authorize.
Nissan does not authorize use of the their BMS in transplanted batteries. Nissan employs a software lock to prevent unauthorized use.

Unless you can either
1. Hack the lock; or
2. Replace the BMS

You are NOWHERE
Since you have not realized that the BMS is locked down, I'll go out on a limb and say that you lack the skills for either (1) or (2).

[jsa061]

What you can do, for instance, is to change to a 30 kWh battery as long as you also change the matched VCM at the same time. It's not very hard.

It's also possible to hack the communication between the BMS and the car. It is actually a lot of things you can do to get a different battery running in your Leaf, but the easiest is to Just change the battery and the VCM.

[kovadam]

Soon a video will be released on YouTube, where we installed a 40 kWh battery on the Leaf 24 kWh. See what came of it.
Hi Nissan!

Waiting for the video link!

[Oilpan4]

Well according to the Ukrainian on you tube who already got a 30kwh pack to work in a 2011 leaf... He says that a 24kwh batt pack can be gutted and repacked with 40kwh modules.
All he needs to prove it is a 40kwh pack to sacrifice.

[krox]

Link to video (in Russian):
https://youtu.be/GtGOZvpa6Ks

[Oilpan4]

You can message him and he will respond.
I don't know if he reads and writes English or uses the translator.

[Kieran973]

So with the 40 kWh Leaf being out now for about a year, what are owners seeing in terms of battery degradation? Last I checked a few months ago:

-Dave in Olympia had (I think?) 2.75% degradation over 12,000 miles in Washington state

-Leftie Biker had 5.5% degradation over 6 months and only 1,000 miles in upstate New York (yikes, sorry)

But what are other Leaf owners/leasees witnessing on their 40 kWh Leafs?

[Kieran973]

And what do we make of this article?

http://www.mynissanleaf.com/posting.php ... =9&t=25773

40,000 miles driven, 30,000 of them in Phoenix, constant rapid charging, and only 7.5% capacity loss according to Leaf Spy? Over 12,000 miles, that would only be 2.25% degradation. And imagine if she didn't rapid charge so much, and/or if she lived somewhere colder than Phoenix. Unless, of course, the 7.5% capacity loss was caused by 1.) calendar degradation in the bad AESC battery, and 2.) Phoenix, so it wouldn't really matter if she drove 40,000 miles or 1,000 miles in one year, she still would have experienced the same degradation regardless?

But how do you reconcile her Leaf's profile with say Leftie Biker's experience in his 2018?

[LeftieBiker]

Constant QCs seem to boost the SOH, but there is little evidence that the effect is permanent. Maybe she lives where nights are cool and the pack cools off.

[cwerdna]

And what do we make of this article?

http://www.mynissanleaf.com/posting.php ... =9&t=25773

40,000 miles driven, 30,000 of them in Phoenix, constant rapid charging, and only 7.5% capacity loss according to Leaf Spy? Over 12,000 miles, that would only be 2.25% degradation.
...
But how do you reconcile her Leaf's profile with say Leftie Biker's experience in his 2018?

I think you made a copy paste booboo.