Date of Award
2025
Document Type
Thesis
Degree Name
Master of Science in Engineering (MSE)
Department
Mechanical and Aerospace Engineering
Committee Chair
Guangsheng Zhang
Committee Member
George Nelson
Committee Member
Yu Lei
Research Advisor
Guangsheng Zhang
Subject(s)
Lithium ion batteries--Performance--Simulation methods, Lithium ion batteries--Thermal properties, Lithium ion batteries--Safety measures
Abstract
Internal short circuit (ISC) caused thermal runaway is a critical challenge for Li-ion batteries. Our group reported a method for simultaneous triggering and in situ measurement of critical ISC parameters including temperature, current, and resistance to quantify ISC behaviors. However, cells in the previous study were unable to experience thermal runaway due to insufficient capacity. In this Thesis, the method was implemented in 4-Ah cells. Cells with Al-anode and Al-Cu ISC experienced thermal runaway while cells with cathode-anode and cathode-Cu ISC did not, highlighting the effects of cell capacity and ISC resistance. Additionally, we investigated the effects of state-of-charge (SOC) and thermal boundary conditions. Low SOC and strong cooling mitigated thermal runaway in cells with Al-anode ISC because high ISC current and heat generation rate could not be maintained. These findings demonstrated the effectiveness of the method in quantifying ISC behaviors and enhanced the understanding of ISC caused thermal runaway.
Recommended Citation
Liu, Madeline, "In situ diagnosis of internal short circuit caused thermal runaway" (2025). Theses. 762.
https://louis.uah.edu/uah-theses/762