Has there been any attempt to rebuild or custom design batteries for the FX or SR? For the FX, it should be possible if the cells fit and the old battery board can be reused.
Bit of a fair warning, if you dont have previous experience building large packs and knowhow when it comes to evs, please disregard and dont follow any of this advice, I really wouldnt recommend you do any of this. With that said, if you pull out the farasis pouches out of a brick, youre left with the shell in which you can fairly easily fit ~168 21700s. If you are using the new tabless 5ah cylindricals that have been hitting the market recently, that should yield ~3.1kwhs or right around the same capacity as a 3.6 brick. Do that twice and you have an fx pack, do it four times and you have a monolith. if you keep the original form factor and pinout of the brick you can reuse all the electronics and not have to come up with some hacky solution.
I did
something similar for my 2009 x project and the same principle applies to the newer bricks. I have a few dead bricks, one of which Ive already pulled the pouches from leaving me with the case, I intend to build the aforementioned 28s6p pack out of molicel p42as and use it as a range extender for the X thatll mount to a rear rack. Im aware of just one other person who has done something similar and that is Rio Cole. He built a replacement pack for his 2013 mx out of (coincidently also) p42as. Ill see if I can dig up some pictures of his pack.
