Connection component, battery cell, battery and electrical device

A method for manufacturing a battery cell, wherein the method comprises:

• providing an electrode assembly;
• providing an electrode terminal;
• providing a connection component, the connection component comprising a body, a convex portion, a concave portion and a gap control portion, wherein the body comprises a first surface and a second surface opposite to each other in a thickness direction thereof, the convex portion is connected to the body and protrudes from the first surface, the concave portion is provided on the second surface and corresponds to the position of the convex portion, and the gap control portion is configured to be when the connection component is stacked on another connection component, the gap control portion is in contact with the other connection component, so as to control a dimension of a gap D between the two connection components to be greater than 0.6H, wherein H is the height of the convex portion protruding from the first surface;
• and
• connecting the body to the electrode assembly, and connecting the convex portion to the electrode terminal;
• wherein the gap control portion comprises a first protrusion, and the first protrusion is provided on the body and protrudes from the first surface and/or the second surface, the first protrusion protrudes from the first surface and is obliquely provided towards the convex portion, or, the first protrusion protrudes from the second surface and is obliquely provided towards the concave portion.

A device for manufacturing a battery cell, wherein the device comprises:

• a first providing module, used for providing an electrode assembly;
• a second providing module, used for providing an electrode terminal;
• a third providing module, used for providing a connection component, the connection component comprising a body, a convex portion, a concave portion and a gap control portion, wherein the body comprises a first surface and a second surface opposite to each other in a thickness direction thereof, the convex portion is connected to the body and protrudes from the first surface, the concave portion is provided on the second surface and corresponds to the position of the convex portion, and the gap control portion is configured to be when the connection component is stacked on another connection component, the gap control portion is in contact with the other connection component, so as to control a dimension of a gap D between the two connection components to be greater than 0.6H, wherein H is the height of the convex portion protruding from the first surface;
• and
• a mounting module, used for connecting the body with the electrode assembly and used for connecting the convex portion with the electrode terminal;
• wherein the gap control portion comprises a first protrusion, and the first protrusion is provided on the body and protrudes from the first surface and/or the second surface, the first protrusion protrudes from the first surface and is obliquely provided towards the convex portion, or, the first protrusion protrudes from the second surface and is obliquely provided towards the concave portion.