Deformation and Failure Properties of High-Ni Lithium-Ion Battery under Axial Loads

Genwei Wang; Shu Zhang; Meng Li; Juanjuan Wu; Bin Wang; Hui Song

doi:10.3390/ma14247844

Deformation and Failure Properties of High-Ni Lithium-Ion Battery under Axial Loads

Materials (Basel). 2021 Dec 18;14(24):7844. doi: 10.3390/ma14247844.

Authors

Genwei Wang^{1

2}, Shu Zhang^{2

3}, Meng Li^{2

3}, Juanjuan Wu^{2

3}, Bin Wang⁴, Hui Song^{2

3}

Affiliations

¹ College of Aeronautics and Astronautics, Taiyuan University of Technology, Jinzhong 030600, China.
² Shanxi Key Laboratory of Material Strength and Structure Impact, Taiyuan 030024, China.
³ College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
⁴ Department of Mechanical and Aerospace Engineering, Brunel University London, London UB8 3PH, UK.

Abstract

To explore the failure modes of high-Ni batteries under different axial loads, quasi-static compression and dynamic impact tests were carried out. The characteristics of voltage, load, and temperature of a battery cell with different states of charge (SOCs) were investigated in quasi-static tests. The mechanical response and safety performance of lithium-ion batteries subjected to axial shock wave impact load were also investigated by using a split Hopkinson pressure bar (SHPB) system. Different failure modes of the battery were identified. Under quasi-static axial compression, the intensity of thermal runaway becomes more severe with the increase in SOC and loading speed, and the time for lithium-ion batteries to reach complete failure decreases with the increase in SOC. In comparison, under dynamic SHPB experiments, an internal short circuit occurred after impact, but no violent thermal runaway was observed.

Keywords: axial load; cylindrical lithium-ion battery; failure mechanism; thermal runaway.

Abstract

Grants and funding