Battery secondary use (battery cascade utilization). It means that when the power battery no longer meets the requirements for the use of electric vehicles, it turns to the fields with low requirements on the performance of the battery pack (such as standby power supply, energy storage power station, etc.) to continue to exert the remaining value of the battery pack to realize the maximum value.

Similarly, Secondary utilization power battery also involves battery detection and diagnosis, battery pack disassembly and reorganization, system integration, and the construction of a new battery management system.

However, at present, because different manufacturers use different specifications of cells and modules, different Pack technologies and even incompatible and closed battery management systems, it is a great obstacle to the classification, reorganization and integration of battery reuse. Therefore, efficient automatic dismantling, rapid selection and classification of modules, advanced BMS management system are the key technologies for reuse.