Battery management system

A battery management system configured to manage secondary batteries used in a use device, comprising:

• a usage history acquisition unit configured to acquire usage history information indicating usage history of the secondary batteries, during a period, mounted on the use device;
• a deterioration estimation unit configured to estimate current deterioration state of the secondary batteries and a deterioration factor causing the current deterioration state based on the usage history information acquired by the usage history acquisition unit;
• a battery load acquisition unit configured to acquire battery load information indicating a battery load estimated to be applied to the secondary batteries when a predetermined scheduled use period is elapsed in a future, the battery load information being calculated using a future use mode of the secondary batteries in the use device;
• a deterioration change degree identification unit configured to identify a deterioration change degree indicating a change in the deterioration state of the secondary batteries at a time point when the predetermined scheduled use period is elapsed, using the current deterioration state and the deterioration factor estimated by the deterioration estimation unit and the battery load information of the secondary batteries acquired by the battery load acquisition unit;
• and
• a battery management unit configured to associate the secondary batteries with a plurality of future use modes by using the deterioration change degree of the secondary batteries identified by the deterioration change degree identification unit such that an evaluation value becomes a minimum value, the evaluation value indicating a degree of deterioration of the secondary batteries in a plurality of the use devices.