Focusing on the question of which test rig should be selected in vibration durability test of power battery assembly of passenger car to accurately reproduce the mechanical vibration it borne in real environment,experimental research and systematic analysis and demonstration are carried out.It is proved that the mechanical vibration borne by power battery assembly mainly came from road excitation and the mechanical vibration transmitted to power battery assembly through suspensions mainly resulted in vertical pseudo damage,which is mainly accumulated by low-frequency signals below 5 Hz.Through the analysis of virtual coherent auto-power,it is proved that the mechanical vibration of power battery assembly came from multiple independent excitation sources,which is a typical multiaxial vibration problem.Finally,it is concluded that the 6 DOF vibration test bench should be used to carry out the vibration durability test of power battery assembly of passenger car.
关键词
动力电池总成/机械振动/试验方法/伪损伤/多轴振动
Key words
Power battery assembly/Mechanical vibration/Test method/Pseudo damage/Multiaxial vibration
维普
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