Simulation of impact resistance of sandwich protective structure for vehicle power battery pack

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (10) : 194-202.

QI Chang1,2,CUI Liping1,2,WANG Jixu1,PEI Lianzheng1,2,YU Chen1,2,YANG Shu1,2

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Abstract

According to the impact protection requirements at the bottom of vehicle power battery pack, three sandwich panel structures with different core configurations were proposed, and their protection performance was numerically simulated and quantitatively analyzed and compared. Firstly, the finite element model of typical impact conditions of power battery pack system was established, the dynamic impact response of battery pack system with a homogeneous bottom plate was simulated, and the deformation and energy absorption mechanism of the structure was revealed. Secondly, the sandwich protection structures at the bottom of the battery pack were designed with hollow circular tubes, BRAS structure and laminated bionic scales as the core layer. Furthermore, taking the axial compression and maximum axial compression ratio of the battery, the protection effect parameters and the total energy absorption of the structure as the evaluation indexes, the impact protection performance of the three sandwich panels was simulated and analyzed, and compared with the homogeneous protection panel. The final results show that the BRAS sandwich panel has the best impact resistance and can be used for bottom protection of power battery pack system.

Key words

vehicle power battery / impact protection / battery pack / sandwich panel / battery module / battery cell

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QI Chang1,2,CUI Liping1,2,WANG Jixu1,PEI Lianzheng1,2,YU Chen1,2,YANG Shu1,2. Simulation of impact resistance of sandwich protective structure for vehicle power battery pack[J]. Journal of Vibration and Shock, 2023, 42(10): 194-202

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