CONNECTION MEMBER, BATTERY CELL, BATTERY, AND ELECTRICAL DEVICE

Embodiments of the present application provide a connection component, a battery cell, a battery, and an electric device, related to the technical field of batteries. The connection component is used for connecting an electrode assembly and an electrode terminal, the connection component includes a body, a convex portion, a concave portion and a gap control portion, and the body includes 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 while the connection component including the gap control portion is stacked with another connection component, the gap control portion contacts the another connection component so as to control 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. According to the connection component provided by the present application, the gap between two adjacent connection components can be controlled when stacked, thereby reducing the risk of material stuck and improving the production efficiency.