| 摘要 |
PROBLEM TO BE SOLVED: To provide a charge control method of a battery pack by which deterioration of battery cells is reduced and safety of battery cells can be improved. SOLUTION: This is a charge control method of a battery pack containing a plurality of battery cells in which a full charge voltage value is set at a first voltage value, includes: a step in which the charge capacity of the plurality of battery cells is measured many times for a certain period; a step in which the measuring number of times wherein the charge capacity measured is 90% or more of a rated capacity of the battery cells is memorized as a first data, and the measuring number of times wherein the charge capacity measured is less than 90% of the rated capacity is memorized as a second data; a step in which the first data and the second data are compared; and a step in which when the first data are larger than the second data, the full charge voltage value of the battery cells is reduced from the first voltage value to a second voltage value and maintained thereat. COPYRIGHT: (C)2011,JPO&INPIT |
