METHODS FOR MANUFACTURING LITHIUM SECONDARY BATTERY AND CURRENT-COLLECTING FOIL FOR LITHIUM SECONDARY BATTERY AND CURRENT-COLLECTING FOIL FOR LITHIUM SECONDARY BATTERY

摘要

A manufacturing method of a lithium secondary battery includes an electrode manufacturing step of manufacturing a positive electrode and a negative electrode, a step of forming an electrode group by stacking or winding the positive electrode and the negative electrode with a separator interposed therebetween, and a step of immersing the electrode group in an electrolyte solution , The electrode manufacturing step includes a perforating step of passing through the current collecting foil to form a plurality of through holes having protrusions protruding from at least one current collecting foil side, and a mixer forming step of forming a mixture layer in the current collecting foil, Characterized in that the process for forming a mixture is continuously performed without winding the current collecting foil after the punching step. This manufacturing method can prevent the peeling of the active material and prevent the generation of the processed metal powder in the current collecting foil in the electrode manufacturing step .