Electrical Response of Mechanically Damaged Lithium-Ion Batteries

Damoon Soudbakhsh, Mehdi Gilaki, William Lynch, Peilin Zhang, Taeyoung Choi and Elham Sahraei
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Damoon Soudbakhsh: Dynamical Systems Laboratory (DSLab), Temple University, Philadelphia, PA 19122, USA
Mehdi Gilaki: Electric Vehicle Safety Lab (EVSL), Temple University, Philadelphia, PA 19122, USA
William Lynch: Research Laboratory of Electronics (RLE), Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Peilin Zhang: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Taeyoung Choi: Korea Aerospace Industries (KAI), Sacheon-si 52529, Korea
Elham Sahraei: Electric Vehicle Safety Lab (EVSL), Temple University, Philadelphia, PA 19122, USA

Energies, 2020, vol. 13, issue 17, 1-15

Abstract: Lithium-ion batteries have found various modern applications due to their high energy density, long cycle life, and low self-discharge. However, increased use of these batteries has been accompanied by an increase in safety concerns, such as spontaneous fires or explosions due to impact or indentation. Mechanical damage to a battery cell is often enough reason to discard it. However, if an Electric Vehicle is involved in a crash, there is no means to visually inspect all the cells inside a pack, sometimes consisting of thousands of cells. Furthermore, there is no documented report on how mechanical damage may change the electrical response of a cell, which in turn can be used to detect damaged cells by the battery management system (BMS). In this research, we investigated the effects of mechanical deformation on electrical responses of Lithium-ion cells to understand what parameters in electrical response can be used to detect damage where cells cannot be visually inspected. We used charge-discharge cycling data, capacity fade measurement, and Electrochemical Impedance Spectroscopy (EIS) in combination with advanced modeling techniques. Our results indicate that many cell parameters may remain unchanged under moderate indentation, which makes detection of a damaged cell a challenging task for the battery pack and BMS designers.

Keywords: EIS; distributed ECM; mechanical deformation; charge/discharge cycle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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