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STUDY OF VARIOUS HYBRID COMPOSITE MATERIALS AND GEOMETRIES FOR BATTERY PACK PROTECTION UNDERGOING GROUND IMPACT LOADING

Penulis : Muhammad Ahdal'ula Rayhanfasya [13616009]
Kontributor / Dosen Pembimbing :
  • Dr. Ir. Muhamad Giri Suada
  • Djarot Widagdo, Ph.D.
  • Dr. Ir. Sigit Puji Santosa, M.SME.
  • Dr. Bentang Arief Budiman, S.T., M.Eng.
  • Poetro Lebdo Sambegoro, M.Sc., Ph.D.
Jenis Koleksi : Tugas Akhir
Penerbit : Teknik Dirgantara
Fakultas : Fakultas Teknik Mesin dan Dirgantara
Subjek :
Kata Kunci : Battery pack, hybrid material, ground impact, protective plates, electric vehicle crashworthiness
Sumber :
Staf Input/Edit : Alice Diniarti  
File : 1 file
Tanggal Input : 23 Jun 2022

Nowadays, electric vehicles are developed and adopted in a very fast pace. Currently, the batteries that are used in electric vehicles are lithium-ion cells with different shapes and configurations. However, ground impact caused by road debris can hit and penetrate the battery pack and results in very severe fire accident. In order to study the ground impact accidents, a simplified finite element model of the battery pack structure using typical cylindrical 2170 cells, and floor-type architecture is analysed. Based on this model, the protection structure is improved using different core geometry and fibre metal laminate material arrangements. Simulation of the battery pack undergoing ground impact loading is done using LSDYNA software. The criteria that are evaluated are battery shortening and specific energy absorption of the protective plate. Studies are conducted to investigate the effect of different arrangements of composite layer, thickness of composite layer, different load cases, thickness of the metal core, and different composite materials. The model is validated using energy method. Simulation results show that adding composite backplate results in a lower battery shortening. Thinner composite layer also improves SEA while still maintaining safe battery shortening. Two load cases are also evaluated for chosen models to ensure that the protection structure are still effective. Thinner unidirectionally stiff double hull (USDH) thickness also improves specific energy absorption (SEA), up to a point where battery shortening increases significantly. Finally changing glass fibre reinforced polymer (GFRP) material to carbon fibre reinforced polymer (CFRP) improves both battery shortening and SEA, but not in a significant way that the cost increase is justified. In this study the most effective design for the battery pack protection structure is a USDH metal core layer with (h : w : t) = (15.87 : 15.87 : 1) mm and a 1.2 mm GFRP backplate layer with quasi-isotropic lay-up. Battery shortening is 51.58% better, SEA is 150.54% higher, and structure weight is 40.59% lower compared with baseline case.

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