Patent ID: 8350531

Claim:
A secondary battery charge control method comprising: a charge control step of executing charging by supplying a charge current to a secondary battery; a charge information acquisition step of acquiring information relating to the charging executed in the charge control step; a storage step of storing the information acquired in the charge information acquisition step as charge data; and a charge inhibition determination step of determining whether to inhibit the charging in the charge control step on the basis of the charge data of a previous cycle that have been stored in the storage step when charging in the charge control step is started again after charging in the charge control step has been completed, wherein the charge information acquisition step includes a timing step of measuring a charge time from start to end of the charging in the charge control step, the storage step includes storing a charge time measured in the timing step as the charge data, and the charge inhibition determination step includes inhibiting the charging in the charge control step when a charge time of a previous cycle that has been stored as charge data in the storage step exceeds a charge time that has been preset to be equal to or longer than a time necessary to charge fully the secondary battery in the charge control step from a state with an SOC of 0%.