Reaming device and reaming method for central hole of lithium battery cell

The invention relates to the technical field of lithium battery processing, in particular to a broaching device for a lithium battery cell center hole and a broaching method thereof.The broaching device comprises a base, a connecting frame is fixed to the top of the base, and a broaching device is arranged at the top end of the connecting frame and used for broaching the center of a lithium battery roll core; the top of the base is rotationally connected with a rotary drum, a driving mechanism is arranged between the rotary drum and the base, and the driving mechanism is used for driving the rotary drum to rotate. According to the device, through the arrangement of the positioning air cooling mechanism, an air source is rapidly and continuously conveyed to the interior of the center hole of the battery roll core after broaching through the positioning air cooling mechanism, so that circulation of the air source is utilized to exchange with outside air, heat dissipation in the battery roll core is accelerated,