Abstract
A honeycomb sandwich battery box composed of high-strength steel outer layer, sandwich aluminum alloy honeycomb and inner layer is proposed. Firstly, the expressions of platform stress, ultimate strain and equivalent elastic modulus of ‘Y’ honeycomb cell are derived based on deformation mechanism and energy principle under quasi-static compression, and then the relations among relative density, unit volume energy absorption and thickness coefficient are acquired. Based on above, the optimal thickness coefficient of honeycomb unit cell can be acquired by utilizing particle swarm optimization algorithm. Simultaneously, aluminum alloy honeycomb sample is made to verify the accuracy of finite element simulation and theoretical models under quasi-static compression. Subsequently, the optimal thicknesses of three layers are optimized with the constraint that the 1st mode frequency is more than 30 Hz. Finally, the mass of the optimized battery box decreases by 37.26 %, and its static performances increase more largely compared with traditional one.
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Acknowledgement
This work was supported by College of Engineering and Technology; Southwest University and the authors gratefully thanks the help and support of Dr. Zhao’s Team. In addition, this work is also supported by Natural Science Foundation of Chongqing, China (Project No.: cstc2020jcyjmsxmX0996).
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Zhao, Y., Shi, J., Wang, K. et al. Mechanical Properties and Optimization Analysis on Battery Box with Honeycomb Sandwich Composite Structure. Int.J Automot. Technol. 24, 1–14 (2023). https://doi.org/10.1007/s12239-023-0001-1
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DOI: https://doi.org/10.1007/s12239-023-0001-1