I've researched the ebikemotion a bit myself, the motor, battery and iWoc are e-SN specific meaning you can't just replace one component with another without a reprogramming of that part. The serial number is programmed via the dealer app, only available to dealers. So even if you do manage to ship the bike without the battery, you'd need to find an authorised dealer who would be willing to temporarily change the e-SN of the borrowed battery.
Hope you find this helpful