I found this info from a battery makers site comparing battery types: Advantages of Li-S in Electric Vehicles Using Full Toyota RAV4 EV Pack Volume _______________NiMH(27 kWh) Li-Ion(30 kWh) Li-Ls(54 kWh) Li-Ls(70 kWh) Driving Range (miles) 81____________94__________ 170_______________ 226 Total Module Weight (lbs) 995______ 600 _________ 475____________ 426 Total Module Volume (cu ft) 6.7 6.7 6.7 6.7 Max Vehicle Payload (lbs) 766_______766_________ 1286___________ 1335 (The 54 kWh packs is based on using SION’s 350 WH/Kg technology while the 70 kWh pack is using the next generation of cells that are at 450 WH/Kg.) I don't know much about SION energy but the Lithium Sulfur seems to be an amazing battery if it can be used for civilian vehicles.
Li-S batteries look very promising. On paper they have twice the volumetric power density and four times the weight power density of Lithium Ion batteries. Almost everything about them looks good. The big unknown is that they are new, and no one knows how well they will work in the real world. Tom
