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Volume 33 Issue 6
Nov 2019
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Chinese Journal of High Pressure Physics  > 2019  >  33(6): 065901.
FAN Wenjie, XUE Pengcheng, WANG Genwei, WANG Bin. Safety Performance of Power Lithium Ion Battery under Compressive Load[J]. Chinese Journal of High Pressure Physics, 2019, 33(6): 065901. doi: 10.11858/gywlxb.20190752
Citation: FAN Wenjie, XUE Pengcheng, WANG Genwei, WANG Bin. Safety Performance of Power Lithium Ion Battery under Compressive Load[J]. Chinese Journal of High Pressure Physics, 2019, 33(6): 065901. doi: 10.11858/gywlxb.20190752
shu

Safety Performance of Power Lithium Ion Battery under Compressive Load

doi: 10.11858/gywlxb.20190752
  • 1.

    Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China

  • 2.

    Key Laboratory of Material Strength and Structure Impact in Shanxi Province, Taiyuan 030024, China

  • 3.

    College of Engineering, Design and Physical Sciences, Brunel University, London UB83PH, UK

  • Received Date: 30 Mar 2019
  • Rev Recd Date: 16 Apr 2019
    Abstract
  • The safety of power batteries is one of the important factors that restrict the rapid development of electric vehicles. In this paper, cylindrical 18650 power lithium ion batteries with different state-of-charge (SOC) were compressed in the radial and axial directions respectively to study the mechanical response, voltage change, temperature change and failure process. The results show that the safety performance of lithium-ion batteries was influenced by SOC, loading speed and loading direction. During the process of compression, electrolyte leakage and instantaneous short circuit may occur, and the temperature of the battery will be rised sharply in a short time after short circuit coming up. During the radial compression process, the phenomena of severe thermal runaway such as explosion and fire will happen for combination of higher SOC and higher loading speed. Therefore, it is important to study the mechanical integrity of lithium-ion batteries under external loads for the safety design of automobiles.

     

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