Battery Safety: How does a bottom vent help against exploding batteries? (18650, 21700, vent)
Channel: ME and the Battery
Date: 2021-08-31

Lithium ion batteries are regularly in the news because of individual batteries catching fire. But most people don't know, what mechanisms are in place to keep batteries safe.

In this video, you will learn how an additional bottom vent structure can help avoiding an explosion or uncontrolled breach of the cell housing in case of a thermal runaway. 

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

George Brilmyer - Thermal runaway IR video
https://www.youtube.com/watch?v=hwXccpeN6Qc

Nasa 2016 bottom vent
https://core.ac.uk/download/pdf/76423444.pdf

Xu 2021 Protection devices in Lithium Ion Batteries
https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=9416701

Donal Finegan - bottom vent video
https://www.youtube.com/watch?v=Ubd2oZHEF9o

Finegan 2017 Identifying the Cause of Rupture of Li-Ion Batteries during Thermal Runaway
https://onlinelibrary.wiley.com/doi/epdf/10.1002/advs.201700369



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