Electric energy transmission joint and preparation method therefor

An electric energy transmission joint, comprising an electric energy transmission copper part, an electric energy transmission aluminum part, and an aluminum wire, with the electric energy transmission copper part comprising a fixer for connection with an electric consumption device and a connector for connection with the electric energy transmission aluminum part, wherein a first through hole is provided inside the electric energy transmission aluminum part, a second through hole is provided inside the connector, an aluminum conductive core exposed by stripping an insulation layer from a front end of the aluminum wire is inserted into a cavity formed by the connection of the first through hole and the second through hole, and the electric energy transmission aluminum part is connected to the aluminum wire by crimping;

• a transitional connection device is further provided between the aluminum conductive core and an inner wall of the cavity, and both an inner surface and an outer surface of the transitional connection device are provided with protrusions for piercing oxide layers on an outer surface of the aluminum conductive core and the inner wall of the cavity.