Journal
FRONTIERS IN MATERIALS
Volume 9, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fmats.2022.850610
Keywords
internal short circuit; Li dendrite; Li-ion battery; simulation; safety
Categories
Ask authors/readers for more resources
This article introduces an electrochemical-thermal model to simulate the internal short circuit caused by Li dendrites in lithium-ion batteries. By changing the size, quantity, relative location, and external temperature of the Li dendrites, the temperature change under various conditions is studied, and critical conditions leading to thermal runaway are proposed.
The internal short circuit caused by the Li dendrite is well known to be a major cause for fire or explosion accidents involving state-of-the-art lithium-ion batteries (LIBs). However, post-mortem analysis cannot identify the most probable cause, which is initially embedded in the cell, because the original structure of the cell totally collapses after the accident. Thus, multiphysics modeling and simulation must be an effective solution to investigate the effect of a specific cause in a variety of conditions. Herein, we reported an electrochemical-thermal model to simulate the internal short circuit depending on Li dendrite's sizes (1, 3, 5, 7, and 9 mu m), quantities (1-9), relative locations (0, 25, 50, 100, and 150 mu m), and external temperature (-10, 10, 30, and 50 degrees C). Through monitoring the temperature change affected by the joule and reaction heats for each case, we suggested critical conditions that led to unavoidable thermal runaway. Thus, this model can be a steppingstone in understanding the correlation between internal short circuits and Li dendrites.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available