Abstract: An implicit full parameterized model was established for lithium-ion power battery compartments of electric vehicles (EV) by using a software platform of SFE Concept to realize EV lightweight design. An optimization process of battery compartments was established by combining an iSight platform. The assembly position of battery hoisting components and wall thickness of key components were taken as design variables, and the overall quality of battery compartment was taken as the optimal-design objective function, while the structural stiffness, strength, the fatigue endurance and the NVH (noise, vibration, harshness) performance were taken as constraint conditions, and using a pointer algorithm. The results showed that the battery mass was reduced by 2.6% after parameter optimization. Therefore, this method has some references for the forwarddesign and development of battery compartment structure.

Key words: lithium-ion power battery, lightweight design, structure optimization, stiffness and strength, parametric design