Hello World, long time watcher, first time poster here.
I’ve just been through the process of swapping Gen2 cells into a Gen1 case. Unfortunately, we got gung-ho, decided Nissan surely wouldn’t
change the order of wires in the BMS connector and were quickly proved wrong by the smoke getting out. It seems pretty certain that Nissan won’t help me out with programming a BMS to suit my home-modified pack. After reading this thread I think there’s hope.
Thanks so much for sharing your work so far. I wish I’d found this about 3 days ago
I think your safest bet is to buy a Gen 1 BMS computer and move IC9 from the bad one to the replacement BMS, because as far as I have been able to determine, all the "identity" of the BMS is stored in there. IC9 is the serial memory right next to IC1, the big processor chip.
Blowing the ASICs like you have done, does not affect the processor, since it is optically isolated from the high voltage circuits with the 24 ASICs that measure and balance the cells.
Once IC9 is soldered in the correct orientation on the replacement BMS, make sure to use the *old* wiring on all your packs to match the Gen 1 BMS.
Make sure you buy a Gen 1 BMS with all white connectors to swap IC9 into.
The best option at this moment on Ebay is one for $60 with free worldwide shipping:http://www.ebay.com/itm/Nissan-Leaf-2011-BMS-for-battery-managing-with-wires-/332086774774
The wires may come in handy if your connectors were damaged in the process of blowing the BMS.