My 2014 Energi runs great but the battery has about half its life left. Typically 8-10 miles at best. I use forscan and all the cells are balanced and no errors so I don't think there are any issues.
I spoke with a dealership and a "rebuilt" battery is the only option from them and they want $15k for one. Yikes.
As I understand it, these batteries have 84 Panasonic 3.7 Volt NMC cells with somewhere between 24-26 AH each. The newer 2019/2020 Fusion cells I understand are 30AH.
I'm tempted to try to source 84 new cells but hoping that I can get 40-50 AH each with the same dimensions as the stock cells.
My question is, if I successfully replace all 84 cells with new ones that are say 40 AH, will the BMS be ok with that? And I presume these cells have to be 3.7 NMC with the same demensions. There's no way as far as I know to replace the current cells with LiFePO cells as they run a different voltage and such. The goal is to swap 84 3.7 volt cells for 84 3.7 volt cells with hopefully higher AH so it can be sort of plug and play.
Guidance, thoughts, considerations? Anyone know if a reputable supplier? I'm looking and the only options seem to be Aliexpress or Alibaba and thus I fear it may be impossible to find good safe accurate cells.
