SECONDARY BATTERY INSPECTION METHOD

摘要

Provided is a secondary battery inspection method for quickly detecting, at the time of screening, the future occurrence of a micro-short-circuit, suppressing short-circuiting between positive and negative electrodes during aging, and promoting the rendering harmless of contaminants. The method comprises step (S12) for charging the aforementioned secondary battery, steps (S13, S14) for aging the secondary battery in a first pressed state, step (S17) for measuring the battery voltage (V1) after aging, step (S18) for screening the secondary battery in a second pressed state with a higher pressure than the first pressed state, and step (S19) for measuring the battery voltage (V2) after screening. Whether there is an internal short-circuit is determined (step (S20)) on the basis of the difference between the voltage (V1) measured in step (S17) and the voltage (V2) measured in step (S19).