| 摘要 |
PROBLEM TO BE SOLVED: To provide an inspection method of a secondary battery which allows for suppression of occurrence of such a case that a cell which is actually non-defective is determined as defective.SOLUTION: An inspection method of a secondary battery measures the voltage drop of a plurality of cells before and after aging, determines whether the voltage drop is smaller than a voltage drop threshold, classifies the plurality of cells, determined that the voltage drop is smaller than the voltage drop threshold, into a plurality of groups, sets a good-product reference value for each group from the voltage drop of a plurality of cells in the group, and performs quality determination of the cells in the group by determining whether or not the difference between the voltage drop of the plurality of cells in the group and the good-product reference value is smaller than a good-product threshold. The good-product threshold is a function of the voltage drop. |
