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=GtGOZvpa6Kshttps://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