Abstract: [PROBLEM] To provide a data distribution platform for data about storage batteries. [SOLVING MEANS] An information system for storage batteries according to an embodiment accepts registration of information about a manufactured storage battery from a first terminal and registration of a use history of a storage battery from a second terminal, the use history including battery state information acquired at each of points in time during a period of use of the storage battery, and accumulates the information about the storage battery and the use history. The information system uses the registered information about the storage battery and/or the registered use history to create an internal state estimation result with a predetermined evaluation technique, and accumulates the internal state estimation result as platform-based evaluation information in association with the registered information and/or the registered use history.