From my limited understanding this is is a 4s BMS @ 12v 200amp ?
Technically it should be possible to replace the BMS with a 16s BMS @ 48v 200amp which offers canbus, 485, monitoring etc. (daly or equivalent), it would also be possible to keep the pouch cells in their existing plastic "containers" effectively building a 9.6/10 kw battery. Alternatively one could just replace the 4s BMS with a parallel capable bms or one which provides canbus.