Patent ID: 8841885

Claim:
An information processing device, comprising: a plurality of secondary battery packs; and a charge and discharge execution unit for executing a charge to the plurality of secondary battery packs and a discharge from the plurality of secondary battery packs, wherein the charge and discharge execution unit is configured to, when executing the discharge, select one of the plurality of secondary battery packs as a selected secondary battery pack based on a number of times each of the plurality of secondary battery packs has been charged and a number of times each of the plurality of secondary battery packs has been discharged, and execute the discharge from the selected secondary battery pack, wherein the charge and discharge execution unit is configured to: detect a fully-charged state of each of the plurality of secondary battery packs, when the charge to each of the plurality of secondary battery packs is executed, and to count a number of times of the detection of the fully-charged state; detect an intermediate state in which a remaining capacity of the each of the plurality of secondary battery packs becomes equal to a predetermined value between a maximum remaining capacity value in the fully-charged state and a remaining capacity of zero, when the discharge from the each of the plurality of secondary battery packs is executed, and to count a number of times of the detection of the intermediate state; and detect a remaining capacity near-zero state, in which the remaining capacity of the each of the plurality of secondary battery packs becomes equal to a near-zero value closer to a remaining capacity of zero than the predetermined value, when the discharge from the each of the plurality of secondary battery packs is executed and to count a number of times of the detection of the remaining capacity near-zero state; and the charge and discharge execution unit is configured to determine the number of times each of the plurality of secondary battery packs has been charged and a number of times each of the plurality of secondary battery packs has been discharged based on the number of times of the detection of the fully-charged state, the number of times of the detection of the intermediate state, and the number of times of the detection of the remaining capacity near-zero state.