BATTERY CELL, MANUFACTURING METHOD AND MANUFACTURING SYSTEM THEREFOR, BATTERY AND ELECTRIC DEVICE

Embodiments of the application provide a battery cell, a manufacturing method and a manufacturing system therefor, a battery and an electric device. The battery cell according to an embodiment of the application includes: a casing having an opening; an electrode assembly, accommodated in the casing and including a tab portion; an end cover assembly, including an end cover configured to cover the opening and an electrode terminal mounted on the end cover, the end cover being provided with a first through hole; and a current collecting member, configured to electrically connect the electrode terminal and the tab portion, where the current collecting member includes a first connecting portion for connecting the tab portion, and projection of a connecting region of the first connecting portion and the tab portion in a thickness direction of the end cover at least partially overlaps with projection of the first through hole in the thickness direction. According to the application, impurities attached to the electrode assembly can be reduced during assembly, thereby improving the safety performance of the battery cell.