Secondary battery module, battery information management device, battery information management system, secondary battery reuse system, secondary battery recovery and sales system, secondary battery reuse method, and secondary battery recovery and sales method

A battery system comprising:

• a plurality of electrically connected battery modules each having an assembled battery formed by electrically connecting a plurality of cells;
• and
• a battery controller provided corresponding to the plurality of battery modules, the battery controller being configured to detect states of the plurality of cells of each of the battery modules, control the plurality of cells of each of the battery modules, and transmit and receive information to and from a controller of a host system,
• wherein each battery module includes:
• a storage device adapted to have stored therein at least one of electrical characteristic information and usage history information on the cells or the assembled battery of the associated battery module, as battery information,
• a battery controller communication interface circuit configured to communicate with the battery controller, and
• a storage device control circuit configured to, in response to an instruction from the battery controller, read the battery information on the associated battery module stored in the storage device and transmit the read battery information on the associated battery module to the battery controller via the interface circuit, and receive the battery information on the associated battery module transmitted from the battery controller via the interface circuit and write the received battery information on the associated battery module into the storage device,
• wherein the battery controller includes:
• a battery module communication interface circuit configured to communicate with the plurality of battery modules,
• means for transmitting to the storage device control circuit of each of the battery modules an instruction to read the battery information stored in the storage device of each of the battery modules and the battery information to be stored in the storage device of each of the battery modules via the battery module communication interface circuit,
• means for receiving the battery information via the battery module communication interface circuit, the battery information having been read from the storage device of each of the battery modules in response to the instruction to read the battery information, and transmitted from the storage device control circuit of each of the battery modules, and
• a host system communication interface for communicating with the controller of the host system, and
• wherein the battery modules and the battery controller are configured to be separable.