| 摘要 |
PROBLEM TO BE SOLVED: To provide an inspection method improved in determination accuracy.SOLUTION: A manufacturing method for a secondary battery according to the present invention forms a small group including a plurality of battery cells having a first aging step and a cooling step identical to each other in condition; and a large group, which is a combination of small groups having the first aging step and cooling step different from each other in condition. A first determination criterion is set for one group, by suing the result of the measurement of an amount of voltage of a battery cell decreased during a second aging step. On the basis of the first determination criterion, the quality determination of the battery cell included in the one group is determined. Additionally, if the one group is determined to include a defective article, a second determination criterion is set for the other group including the battery cell determined as a defective article, by using the result of the measurement of the amount of voltage dropped. On the basis of the second determination criterion, the quality determination of the battery cell included in the other group is made. |
