| 摘要 |
PROBLEM TO BE SOLVED: To improve the accuracy in quality determination of a secondary battery.SOLUTION: A secondary battery inspection method comprises: a first aging step of storing, for a predetermined period of time at a temperature of 40°C or more and 80°C or less, a secondary battery that has been subjected to initial charging; a step of measuring, after the first aging step, a first voltage that is a battery voltage value of the secondary battery, at a temperature of 40°C or more and 80°C or less; a second aging step of storing, for a predetermined period of time at a temperature of 0°C or more and 30°C or less, the secondary battery after measuring the first voltage; a step of measuring, after the second aging step, a second voltage that is a battery voltage value of the secondary battery; and a step of determining that the secondary battery is defective if a difference between the first voltage and the second voltage is greater than a threshold value.SELECTED DRAWING: Figure 1 |
