Battery storage system, the storage battery monitoring device, and a storage battery monitoring method

To identify whether each of the plurality of unit cells in the battery system is available, and a plurality of secondary battery packs are attached to each of said plurality of secondary battery packs, wherein each of the secondary batteries an information storage unit for storing the battery information about the pack, on the basis of the battery information stored in the information storage unit comprises a monitoring device for determining whether it is possible to mount to the battery system.