Battery cell ending device, lamination stacking machine and battery production line

The utility model belongs to the technical field of batteries, and discloses a battery cell ending device, a lamination machine and a battery production line. The device comprises a track, and a diaphragm supporting assembly and a battery cell supporting assembly which are oppositely arranged, the cell supporting assembly is used for fixing a to-be-ended cell, and the diaphragm supporting assembly is used for fixing a diaphragm; the distance between the battery core supporting assembly and the diaphragm supporting assembly is a diaphragm with a reserved length and used for ending; the battery cell supporting assembly and/or the diaphragm supporting assembly are/is mounted on the track in a non-contact manner; and when the to-be-ended battery cell is driven by rotation, the diaphragm between the battery cell supporting assembly and the diaphragm supporting assembly is configured in a way that the battery cell supporting assembly and/or the diaphragm supporting assembly are/is pulled to slide on the track towar