The 36 motors are distributed to create some redundancy.
Not sure about CG as the battery could be rearward and won't alter during flight
For reference
A boffin has torn down a Tesla battery. It is a good reference for the weight and specs of a state of the art battery
https://teslamotorsclub.com/tmc/thre...ry-pack.34934/
Tesla battery (LiCoO2):
Total 85kwh battery cell weight is 900lbs plus uber strong housing of 300lbs.
The pack contains modules. Each module weights 56 lbs and delivers 5.31kWh with a mass of 1001 in^2 -
Or 10.55 lbs per kWh
188.4 in^2 per kWh
Edit: The above are specs of a tesla car battery for reference. No specs released yet for the Lilium battery.
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