Lithium iron phosphate batteries than Tesla MODELS using the ternary lithium batteries in much higher energy density, weight is about 200 wh/kg, this means that the same weight of ternary lithium battery range is longer than the lithium iron phosphate batteriesBut its shortcomings are obvious, when its temperature is 250-350 ℃, internal chemicals began to decompose, thus puts forward high requirements on battery management system, the installation of insurance device need batteries separately for each section, in addition, due to the monomer volume is small, so the bike to battery monomer quantity is very large, MODELS, for example, more than 7000 day18650 the ternary lithium battery to meet the dosage of the assembly of a car, no doubt this again for the battery management system is further increased the difficulty of control.