| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery control method, by which heat generation by precipitated Li is suppressed at a high efficiency.SOLUTION: A lithium ion secondary battery control method comprises: a step S101 for measuring a battery temperature, an input current value and an input period during charging a lithium ion secondary battery each time the lithium ion secondary battery is charged; a step S102 for making a determination on whether or not the charge conditions, i.e. during the charging, the temperature is -20°C or below, the input current value is 20 C or more, and the input period is 0.5 sec. or less (excluding 0 sec.) are all satisfied; a step S103 for counting up the number of inputs with all the charge conditions satisfied; a step S104 for making a determination on whether or not the number of inputs is no less than a predetermined threshold; and a step S105 for storing the lithium ion secondary battery at 60-70°C for three hours or longer in the case of the number of inputs equal to or larger than the threshold.SELECTED DRAWING: Figure 2 |
