The key to the advancement of lithium-ion battery technology is to further improve battery performance, improve quality, reduce costs, and improve safety through the development of new materials.

　　In order to meet the requirements of downstream applications for increasing battery energy density, on the one hand, materials with high specific capacity can be used, and on the other hand, high-voltage materials can be used by increasing the charging voltage.

　　Near and mid-term: While optimizing the existing system of lithium-ion power battery technology to meet the needs of large-scale development of new energy vehicles, focus on improving key technologies such as safety, consistency and life.

　　Mid-to-long term: focus on the research and development of new material system power batteries, significantly increase energy density, greatly reduce costs, and realize the practical and large-scale application of new system power batteries.

　　New energy vehicles mainly use lithium iron phosphate batteries and ternary system lithium batteries, which are retired after a period of use. They can be disassembled and reorganized for use in energy storage or power backup industries, so that they can completely replace lead-acid in terms of price and performance. battery. This is called the cascade utilization of lithium batteries.

　　To carry out echelon utilization, we must first understand the quality and safety performance of decommissioned batteries.

　　Battery companies must establish a big data traceability system platform and battery testing and evaluation methods. Big data should include battery cell R&D and production data, battery pack R&D and production data, battery pack on-board operation monitoring data, etc. Use big data to evaluate the health of retired batteries to determine whether the batteries can enter the echelon utilization market.

　　Therefore, in the design stage of the power battery, it is necessary to make preparations for the subsequent echelon utilization and disassembly and recycling.