How complicated is this? I don't see how this can possibly be a practical solution at all. It must be packed into the chassis and be a completely encased rigid platform. No potholes allowed.
"Tesla’s latest vehicle, the Model S 100D has a 100-kilowatt-hour battery pack, which reportedly gives it a range of 335 miles (540 km). The pack is large, about 16 feet long, 6 feet wide and 4 inches thick. It contains more than 8,000 lithium-ion battery cells, each one individually packaged inside a cylinder housing that measures about 2 to 3 inches (6 to 7 centimeters) high and about 0.8 inches (2 cm) across."