What is thermal runaway in Lithium-ion batteries and how to control it? | A course on Battery Safety

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In this video, Akshay Gill, Director at MakerMax Inc. takes you through the explanation of why thermal runaway happens, how it happens and ways to control a thermal runaway reaction in Lithium-ion batteries so that they do not cause devastation to products, vehicles, factories and cosumers.

Опубликовано:

29 июн 2024

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Комментарии : 6

@ElectrifiedEgypt 2 года назад

Thank you so much. Very informative.

@Rajesh-nj7lw Год назад

Thanks for your clear explanations

@kevenc Год назад

It's important to know that just because you don't violate the rules on a lithium cell doesn't mean TR (thermal runaway) won't happen. Dendrite growth and impurities in construction can cause TR even in the best cells. It's widely known in the industry that between 1 in 4M and 1 in 10M cells, even from top tier manufacturers, will develop an internal short. If you continue to use the cell, this can cause TR. We also have to realize in any device there is the problem of mechanical mangling due to some sort of abuse. The bottom line is you always have to assume at some point TR will happen, so design for safety.

@davidpacholok8935 4 месяца назад

Kevenc, I absolutely agree with your comments. I think I can believe the one in 4E6 failure rate from the best manufacturers for an 18650 cell. But my engineering intuition tells me that the failure rate for a larger cell will be higher. Two factors at play here. 1. Failure rate per square area of separator due to contamination and/or defects, 2. Damage due to final cell assembly. I suspect 1 above is is the greater part, but I have no data on this. Be that as it may a BESS INSTALLATION may be 50 MW total. If each cell is 100 WH, 500,000 cells are needed. So our chances of infant mortality are 4E-7 x 5E5 or about 2E-1. 1 in 5! Now not all failures will lead to thermal runaway, hopefully the BMS will notify the operator to take corrective action before things go south. Unfortunately this seems not to have happened in Surprise AZ, etc etc. Even if no one is injured in such events, we, the electric utility rate payers will ultimately pick up the tab.