BATTERY CELL, BATTERY, ELECTRICAL APPARATUS, AND MANUFACTURING METHOD FOR BATTERY CELL

A battery cell, a battery, an electrical apparatus, and a manufacturing method for a battery cell are disclosed. The battery cell includes an electrode assembly, and the electrode assembly includes a main body part and a tab extending from the main body part. The tab includes a first bending portion and a straight portion, and the straight portion is connected to the main body part through the first bending portion; a second bending portion is formed on the straight portion, and the second bending portion protrudes towards the side of the main body part. The arrangement of the second bending portion generates a protruding deformation towards the side of the main body part, which makes the layers of the tab close together, forming a local binding of the tab, and increasing the resistance to separation between the layers of the tab, thereby improving the safety of the battery.