Pin roller type connecting device of lithium ion battery electrode foil for large current test

The invention relates to a pin roller type connecting device of a lithium ion battery electrode foil for a large-current test. The device comprises a main frame, a thrust assembly and a roller bearing part, wherein one end of the main frame is externally connected with a lead-out wire, and the electrode foil is inserted into the other end of the main frame; the thrust assembly has elastic telescopic and conductive capabilities; the roller bearing part comprises a guide groove which is formed in the side part of the main frame and has a dip angle, a rolling shaft which is rotationally mounted at one end of the thrust assembly, and a roller which is arranged on the rolling shaft; when the thrust assembly pushes the rolling shaft to move to a bottom end of the guide groove, a rolling column tightly presses the electrode foil, and an end, away from the rolling shaft, of the thrust assembly can be pressed into the main frame and connected with the lead-out wire. Compared with the prior art, a problem that ohmic re