Patent ID: 8618773

Claim:
A charging control method for a battery pack comprising a plurality of battery cells in which a full charge voltage value is initially set as a first voltage value, the charging control method comprising: charging the plurality of battery cells to the first voltage value in an initial charge mode; and resetting the full charge voltage value to a second voltage value less than the first voltage value in a subsequent charge mode, wherein the resetting the full charge voltage value comprises: measuring a charge capacity of any one of the battery cells several times for a duration after the initial charge mode; storing a number of measurement times in which the measured charge capacity is equal to or higher than 90% of a rated capacity of the battery cell as first data, and storing a number of measurement times in which the measured charge capacity is less than 90% of the rated capacity of the battery cell as second data; comparing the first data and the second data; and decreasing the full charge voltage value from the first voltage value to the second voltage value when the first data is greater than the second data.