Abstract: Disclosed is method for producing a secondary battery, capable of selection of a secondary battery having a defect caused by a micro short-circuit with high accuracy. A step for producing a secondary battery includes an inspection step for selecting the secondary battery having the defect among multiple secondary batteries. In the inspection step, a short circuit resistance is calculated based on capacitances of the multiple secondary batteries calculated before self-discharge inspection, a time required for the self-discharge inspection, first and second reference voltages calculated from open circuit voltages measured before and after the self-discharge inspection in the multiple secondary batteries, and first and second voltages which are open circuit voltages of one selected from the multiple secondary batteries measured before and after the self-discharge inspection.

Abstract: Disclosed is method for producing a secondary battery, which enables the selection of a secondary battery having a defect caused by a micro short-circuit with high accuracy. Specifically disclosed is a step (S1) for producing a secondary battery, which includes an inspection step (S70) for selecting a secondary battery (1) having a defect caused by a micro short-circuit among multiple secondary batteries (1). The inspection step (S70) includes a self-discharge inspection in which the multiple secondary batteries (1) are allowed to stand at normal temperature for a predetermined period.