Lithium Technology Corporation (LTHUQ)

[ratler3311]

Rivian - OK I Lied - One More - Battery Suppliers

According to Richard Farquhar, Rivian’s VP of Propulsion, the pack is thick because it contains not one, but two layers of vertical 21700 (also known as 2170) cylindrical cells — the same cell format made by Panasonic at Tesla’s Nevada Gigafactory and used in Tesla’s Model 3 sedan.
Rivian isn’t saying who their cell supplier is although it does not seem likely to be sourcing Gigafactory cells. Samsung also makes 21700 cells and other battery makers are free to use the same size as well instead of the older and more common 18650 format.

https://electricrevs.com/2018/11/29/rivian-the-powertrain-details-you-wont-read-about-elsewhere/