| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a nonaqueous electrolyte secondary battery, by which the initial charging can be completed in a short time while preventing the precipitation of charge carriers.SOLUTION: A method for manufacturing a nonaqueous electrolyte secondary battery according to the invention, which is arranged so as to involve graphite as a negative electrode active material comprises: a step of constructing a battery having a positive electrode and a negative electrode; and an initial charging step of initially charging the battery. The initial charging step includes: a first charging treatment in which the battery is charged with a first charging current density until a structural change of the first stage is caused in the graphite. The first charging current density is set so as to avoid making the potential of the negative electrode 0 V or less; and a second charging treatment in which the battery is charged with a second charging current density smaller than the first charging current density after the first stage structural change is caused in the graphite. |
