| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem of the conventional inspection method of a secondary battery that the measurement accuracy of low temperature output characteristics cannot be enhanced sufficiently.SOLUTION: An inspection method of a secondary battery has a charging step S1 of charging an inspection object cell up to a measurement voltage, a voltage drop amount calculation step S2 of discharging at a voltage of the measurement voltage or less, and calculating the voltage drop amount before and after discharge, an aging step S6 of performing the aging after the voltage drop amount calculation step S2, an inspection object value calculation step of calculating the value of the inspection object item of the inspection object cell obtained by performing multiple regression analysis using at least one of the aging temperature and aging time, and the voltage drop amount, and a good item determination step S7 of determining a good item when the value of the inspection object item thus calculated fall within a standard range.SELECTED DRAWING: Figure 1 |
