[brian_]

Lotsa questions: How common are these? Are they used then in other vehicles? Cooling, passive or otherwise? ...

Is this because another company uses similar ones in a vehicle whose name rhymes with Jolt?

• I have never heard of another vehicle that uses the same modules as the Chrysler Pacifica Hybrid, although other modules may use the same cells. They are well known in this forum mostly because they have been sold as bare modules by various distributors, not due to salvage from Pacificas.
• They are cooled by a chill plate on one of the large faces (the bottom face in the Pacifica and in the photos on the linked page); in the Pacifica Hybrid that uses circulating liquid. Of course you could not actively cool them or could just blow air over the face that is supposed to have a thermal transfer plate on it, just as you can fail to provide appropriate cooling with any module, resulting in limited performance.
• The Volt has similar cells, and a similar (but different in details due to cooling method) stack structure, but not the same size and probably not identical internal composition or construction of cells. The Volt and Pacifica modules have some family resemblance, but are far from twins.

 

[brian_]

• The Volt has similar cells, and a similar (but different in details due to cooling method) stack structure, but not the same size and probably not identical internal composition or construction of cells. The Volt and Pacifica modules have some family resemblance, but are far from twins.

After I posted this and had to go do something else, I realized that the question was likely about the Bolt, not the Volt. The Bolt modules use the same thermal management approach as the Pacifica modules, so in the LG Chem family the Pacifica and Bolt are siblings, and the Volt is their cousin.