Method for manufacturing secondary battery and secondary battery

Abstract

A secondary battery having an electrode body including a positive electrode plate, a negative electrode plate, and a separator, is manufactured by steps including preparing a positive electrode precursor, in which a positive electrode active material layer including positive electrode active material and a protective layer having lower electrical conductivity than the positive electrode active material layer has been applied to a surface of a positive electrode core, which is a strip-shaped metal foil, cutting a region of the positive electrode precursor, where the protective layer has been applied, by a continuous wave laser, preparing a negative electrode precursor, in which a negative electrode active material layer including negative electrode active material has been applied to a negative electrode core, which is a strip-shaped metal foil, and cutting a region of the negative electrode precursor, where the negative electrode active material layer has been applied, by a pulsed laser.

CPC Classifications