Battery cell, battery, electrical device, and manufacturing method and device for battery cell

A battery cell, comprising:

• an electrode assembly, comprising a tab;
• a housing, having an opening and comprising a limit part, wherein the housing is configured to accommodate the electrode assembly;
• and
• an end cap, comprising:
• a cap body, wherein:
• the cap body is configured to cover the opening;
• in a thickness direction of the end cap, the cap body is located at one side of the limit part away from the electrode assembly;
• and
• the limit part is configured to limit the cap body from moving relatively to the housing towards the electrode assembly;
• and
• a convex part protruding from an inner surface of the cap body towards the electrode assembly, the convex part being configured to go beyond the limit part away from the cap body, so that the convex part is pressed against the tab;
• wherein the limit part is configured to cover at least a portion of the tab in a thickness direction of the end cap.

A battery cell, comprising:

• an electrode assembly, comprising a tab;
• a housing, having an opening and comprising a limit part, wherein the housing is configured to accommodate the electrode assembly;
• an end cap, comprising:
• a cap body, wherein:
• the cap body is configured to cover the opening;
• in a thickness direction of the end cap, the cap body is located at one side of the limit part away from the electrode assembly;
• and
• the limit part is configured to limit the cap body from moving relatively to the housing towards the electrode assembly;
• and
• a convex part protruding from an inner surface of the cap body towards the electrode assembly, the convex part being configured to go beyond the limit part away from the cap body, so that the convex part is pressed against the tab;
• and
• an insulation member, comprising:
• an insulation part configured to isolate the cap body from the housing;
• and
• a pressing part connected to the insulation part and configured to extend from the insulation part towards the tab to press against a top surface of the tab.