Research and Optimization of Electric Vehicle Battery Pack Durability based on Multi-condition Load Spectrum Coupling
With the comprehensive application of CTC chassis and battery integration technology,the durability of the battery pack largely determines the durability and safety of the entire vehicle.This project takes the new energy vehicle battery pack of a specific manufacturer as the research object,starting from the macro and micro failure mechanisms of the battery pack.It explores load characteristics,static characteristics,and fatigue life analysis methods.A reliable battery pack fatigue durability design method for electric vehicles is proposed,solving the challenge of accurately designing battery pack durability due to complex loads when driving on bumpy roads.This provides a reference for the safe design of electric vehicles.Based on the fracture morphology analysis of failed battery pack components,this article infers that the failure mode of the battery pack is fatigue failure.The load combinations under multiple working conditions of electric vehicles are used to analyze and optimize the existing structure.After static strength and fatigue strength analyses,the fatigue life of the weak area A of the optimized battery pack under three survival probabilities has been significantly improved by 30%-50%.At the same time,it explores the topological optimization method for the battery pack,completing multi-objective collaborative optimization under multiple working condition combinations.The most durable and lightest battery pack structure is obtained for reference by similar automobile models.
Electric VehicleBattery packLoad SpectrumFatigue Strength
NETL
NSTL
万方数据
