| 摘要 |
A method for manufacturing a lithium-ion secondary battery according to the present invention includes at least the following four steps (A1) through (A4). (A1) an initial-charge step for charging a lithium-ion secondary battery in a temperature environment of -20 to 15 °C inclusive before an initial charge, (A2) an ageing step for leaving the lithium-ion secondary battery in a temperature environment of 30-80 °C inclusive after the initial-charge step (A1), (A3) a short-circuit-detection step for detecting a short-circuit in the lithium-ion secondary battery by measuring the amount of voltage drop of the lithium-ion secondary battery and comparing the amount of voltage drop against a reference value, and (A4) a selection step for selecting a lithium-ion secondary battery in which the short-circuit has not been detected. |
