Cathode pole piece treatment device for lithium ion battery

The utility model provides a cathode pole piece treatment device for a lithium ion battery. The device comprises a rolling mechanism, a heating mechanism, a vacuumizing mechanism and a metal lithium treatment mechanism, wherein the rolling mechanism comprises a press roller and a back roller and is used for rolling a cathode pole piece to be treated; the surface of the cathode pole piece is a cathode diaphragm containing a cathode active material; the heating mechanism comprises a heating chamber; the heating chamber seals and accommodates the rolling mechanism and is used for heating the cathode pole piece; the vacuumizing mechanism is in sealed communication with the heating chamber of the heating mechanism and is used for vacuumizing the heating chamber of the hating mechanism; the metal lithium treatment mechanism is positioned in the heating chamber and at the upstream part of a rolling pair consisting of the press roller and the back roller of the rolling mechanism, comprises a metal lithium spray head which faces to the surface of the cathode diaphragm of the cathode pole piece to be treated, and is used for spraying liquid lithium onto the surface of the cathode diaphragm of the cathode pole piece so as to enrich lithium for the cathode pole piece before rolling the cathode pole piece by the press roller and the back roller of the rolling mechanism. Therefore, the requirement on the lithium enrichment uniformity and quantity can be improved, the cost is low, the process is simple, and industrial batch production is easy to realize.