CIRCUIT CONNECTION DEVICE

A circuit connection device includes a first conductive terminal, a cable and a first fixed joint. The first conductive terminal is provided with a first receiving socket and a first guide channel in communication with the first receiving socket. The first guide channel is in communication with the outside via a first external connector. One end of the cable is inserted into the first receiving socket, the cable is provided with a communication channel, the communication channel is in communication with the outside through a first communication port, and the first communication port is located in the first receiving socket. The first fixed joint is sleeved on the cable and connected to the first conductive terminal, and the first receiving socket forms a first cooling cavity enclosed by the first fixed joint.