Pole piece, roll core and battery core

The utility model relates to the technical field of batteries, and discloses a pole piece, a roll core and a battery cell. The battery cell comprises a pole piece, the pole piece comprises a pole piece body and tabs, the multiple tabs are arranged on the edge of the pole piece body and arranged at intervals in the first direction, and a notch is formed in the end, away from the pole piece body, of each tab. When a plurality of tabs are kneaded or flattened, the mutual overlapping and interference conditions of the tabs can be reduced, and the flatness of the tabs after the tabs are kneaded or flattened is ensured. On the basis, the gaps can release the internal stress of the tabs, the deformation degree of the tabs is reduced, the flatness and the consistency of the end surfaces of the battery cells after the tabs are flattened are improved, the subsequent welding stability of the tabs and the confluence plate is ensured, and the performance of the battery cells is further ensured. 本实用新型涉及电池技术领域，公开了一种极片、卷芯及电芯