Battery Safety: What does deep discharge and overdischarge mean and why is it dangerous?
Channel: ME and the Battery
Date: 2021-10-30

Lithium ion batteries are regularly in the news because of individual batteries catching fire. But most people don't know, what mechanisms are actually causing a safety threat.

In this video, you will learn what deep discharging of Lithium ion cells means, what overdischarge is, and in which cases it poses a safety risk and why.

Throughout the video, I am referring to the following papers and resources:

Connor Fear - Elucidating Copper Dissolution Phenomenon in Li-Ion Cells under
Overdischarge Extremes
https://doi.org/10.1149/2.0671809jes

Hui-Fang Li - Effect of Overdischarge on Swelling and Recharge
Performance of Lithium Ion Cells
https://doi.org/10.1002/cjoc.200890286

Rui Guo - Mechanism of the entire overdischarge process and overdischarge-induced internal short circuit in lithium-ion batteries
https://doi.org/10.1038/srep30248

Thomas Langer - Studies on the deposition of copper in lithium‑ion batteries during the deep discharge process
https://doi.org/10.1038/s41598-021-85575-x

Jan Philipp Schmidt - Beneficial Use of a Virtual Reference Electrode for the Determination of SOC Dependent Half Cell Potentials
https://doi.org/10.1149/1.3684800

Electrochemical potential series
https://leverageedu.com/blog/electrochemical-series/

André Karwath - Digital Multimeter
https://commons.wikimedia.org/wiki/File:Digital_Multimeter_Aka.jpg



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