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

This application discloses a battery cell, a battery, an electric apparatus, and a manufacturing method and device of battery cell. The battery cell includes a housing, an electrode assembly, and a pole. The housing is integrally formed and includes two first side walls arranged opposite each other in a first direction and two second side walls arranged opposite each other in a second direction, the two first side walls and the two second side walls enclose an accommodating cavity, the housing has at least one opening in a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other. The electrode assembly is accommodated in the accommodating cavity, and the electrode assembly includes a body portion and a tab protruding out of the body portion. In the battery cell in this application, the pole is integrated and assembled on the side wall of the housing. In this way, the electrode assembly does not need to be connected to an end cover beforehand when being placed into the housing, which facilitates placement into the housing and simplifies assembly procedures of the battery cell.