Battery cell, method and system for manufacture same, battery, and power consuming device

A battery cell, comprising:

• an electrode assembly comprising a first tab arranged around a central axis of the electrode assembly;
• a housing configured to accommodate the electrode assembly, wherein the housing comprises a barrel and a cover connected to the barrel, the cover and the barrel are of an integrally formed structure, the barrel is arranged around a periphery of the electrode assembly, the barrel has an opening at an end facing away from the cover, the cover is provided with an electrode lead-out hole, the central axis extends in a first direction and passes through the electrode lead-out hole, the first tab comprises a first annular portion, the first annular portion is arranged opposite to the cover, and a projection of the first annular portion in the first direction does not overlap with a projection of the electrode lead-out hole in the first direction;
• a cover plate for closing the opening of the barrel;
• an electrode terminal installed in the electrode lead-out hole, wherein the electrode terminal comprises a terminal body, and the terminal body is provided with a first recess;
• and
• a current collecting member which is at least partially located between the cover and the first annular portion, wherein the current collecting member is configured to connect the first annular portion to the electrode terminal in such a way that the first tab is electrically connected to the electrode terminal;
• wherein one of the following is met:
• the first annular portion is welded to the current collecting member to form a first welded portion that is annular and is arranged around the central axis, and a projection of the first welded portion in the first direction does not overlap with a projection of the electrode lead-out hole in the first direction;
• or
• the first annular portion is welded to the current collecting member to form a plurality of first welded portions, and the plurality of first welded portions are spaced in a circumferential direction of the first annular portion, and a projection of each one of the plurality of first welded portions in the first direction does not overlap with a projection of the electrode lead-out hole in the first direction,
• wherein the terminal body of the electrode terminal is formed with a connecting portion at a bottom of the first recess, and the connecting portion is welded to the current collecting member to form a second welded portion, the connecting portion comprises a groove, a bottom wall of the groove is formed with the second welded portion, and the groove is configured to be recessed from a first outer surface of the connecting portion in a direction toward the electrode assembly such that a gap is formed between the first outer surface of the connecting portion and the bottom wall of the groove.