You can also stick the cells in the freezer before soldering. It adds a fraction of a second to coming up to temperature, and gives the cell proper a lot more thermal wiggle-room. Nothing bad will happen if you keep them above about -20° C.
Definitely file this under "bad advice you probably shouldn't follow, and don't tell them I sent you", but 'allegedly' this works...
That's extremely, extremely risky to do if you don't know the cell's composition, especially the liquid electrolyte, and its performance in cold temperatures. Last thing you want to do is manage to get it frozen and physically damage the layers.
Definitely file this under "bad advice you probably shouldn't follow, and don't tell them I sent you", but 'allegedly' this works...