If I take a look at the diagrams in the datasheet, I think even a 200A fuse would be okay when running peaks around 270A battery which only last for a few seconds.
And I think a 80Vdc fuse should also be okay for a 22S battery because the voltage sag would bring it below 80V.
Is there somewhere a table with resistances in milliohms for the Cooper-Bussmann fuses? Unfortunately I could not find one.