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What's inside Li-ion cell (pouch or cylindrical) ?

Ravi Kempaiah

New Member
Dec 16, 2019
I noticed some confusion regarding pouch vs cylindrical cells, especially when the Journal of Electrochemistry paper describing the cell chemistry that would be able to power an EV for 1 million miles.
paper: A Wide Range of Testing Results on an Excellent Lithium-Ion Cell Chemistry to be used as Benchmarks for New Battery Technologies

Since I am a researcher in this field, I thought I would clarify some of this misunderstanding.
A pouch cell is not chemically different from a cylindrical cell. It is wound differently that is all. The same materials can be wound differently and cylindrical cells do have slightly tighter winding as the casing can withstand higher pressure.

Here is a recent video where Prof. Dahn is showing a reporter what is inside a Li-ion pouch cell.

If there is interest, I can prepare a more through presentation on the intricacies of pouch cell vs cylindrical cells and share it here.

I hope we clear some ambiguity in this topic.
  • Informative
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