Current collecting member, secondary battery, and method for manufacturing secondary battery

A secondary battery, comprising an electrode assembly, a housing, a top cover assembly, and a current collecting member, wherein

• the current collecting member comprises a substrate and a support plate, the substrate extends in a direction perpendicular to a transverse direction, and the support plate extends from an outer end of the substrate in a longitudinal direction and folds back to a side of the substrate in the transverse direction;
• the support plate comprises a bending portion and a connecting portion, the bending portion is connected to the substrate and bent into an arc shape, and the connecting portion extends from an end of the bending portion farther from the substrate;
• a first gap is reserved between the connecting portion and the substrate, and a first gap is gradually narrowed in a direction extending away from the bending portion;
• the electrode assembly is accommodated in the housing and comprises a body and a first tab, and the first tab extends from an end of the body in the transverse direction;
• the top cover assembly comprises a top cover plate and a first electrode terminal disposed on the top cover plate, the top cover plate is connected to the housing, and the current collecting member is connected to the first tab and the first electrode terminal;
• the substrate is disposed on a side of the body in the transverse direction, and the support plate folds back to a side of the substrate farther from the body;
• and
• the first tab is connected to the connecting portion and bent along a surface of the bending portion.

A method for manufacturing a secondary battery, wherein the secondary battery comprises an electrode assembly and a current collecting member, the electrode assembly comprises a body and a first tab, and the first tab extends from an end of the body in a transverse direction;

• and
• the manufacturing method comprises:
• bending a current collecting plate to form a bending structure, wherein the bending structure comprises a substrate and a support plate that are bent toward each other, and the support plate extends from an outer end of the substrate in a longitudinal direction;
• connecting the first tab to the support plate;
• and
• bending the first tab and the support plate that are connected, wherein during bending, a bending portion and a connecting portion are formed in the support plate, the bending portion is located at a bending position of the support plate and is arc-shaped, the connecting portion extends from an end of the bending portion farther from the substrate, and the substrate, the bending portion, and the connecting portion from the current collecting member;
• and wherein a first gap is reserved between the connecting portion and the substrate, and a first gap is gradually narrowed in a direction extending away from the bending portion.