What are the problems faced by cascading use of waste power lithium-ion batteries

At present, there are still some problems plaguing the development of echelon utilization of power lithium-ion batteries in my country. 1. The cost of cascade utilization is high. According to the analysis of relevant experts, according to my country's current technology and process, the cost of realizing the echelon utilization of power lithium-ion batteries does not have high advantages. At the same time, with the attenuation of power lithium-ion batteries, the service life of power lithium-ion batteries will also be greatly reduced. Retired power lithium-ion batteries have higher hidden costs from recycling and transportation to evaluation and testing. Some people in the industry believe that these issues will become a puzzle when choosing a new battery or using batteries in cascades. 2. The battery lacks consistency. Since my country first launched a demonstration research project on cascade utilization of power lithium-ion batteries in 2014, the issue of battery consistency has always been an important challenge in the operation of cascade utilization projects. It is reported that the inconsistency of power lithium-ion batteries in terms of capacity, internal resistance, and voltage is closely related to the battery's own charge-discharge reaction mechanism. Previously, experts from the Chinese Academy of Electrical Engineering, Lai Xiaokang, said that even with retired batteries that have been selected by thousands, when constructing a tiered energy storage system, they still cannot fully guard against the occurrence of battery consistency and discreteness during system operation. 3. Different technical routes. Some experts said that some people think that the energy storage battery is not moved there, whether its technical requirements are not so high. In fact, from a different perspective, some aspects of energy storage batteries may have higher technical requirements. Some people in the industry believe that in the future, electric vehicles and energy storage end have different battery requirements. Electric vehicles tend to have high energy density power lithium-ion batteries, while energy storage end values u200bu200bbatteries with high cycle life. Therefore, power The technical routes of lithium-ion batteries and energy storage batteries will also be separated. And there are still some confusions about whether there are potential safety hazards and whether the stability of ternary power lithium-ion batteries will be used in the energy storage end in the future. Fourth, the value assessment is not uniform. At present, the price range of decommissioned power lithium-ion batteries on the market is relatively large, and there is no uniform standard in the industry for evaluating the residual value of decommissioned batteries. Experts from the China Southern Power Research Institute believe that the evaluation and evaluation of a battery (or battery pack), its actual remaining capacity, health status, estimated remaining cycles, and full life cycle discharge capacity, are more important for decommissioning power lithium The market value of ion batteries has a more straightforward impact. At present, on how to evaluate the value of decommissioned batteries, depots, users, recycling agencies, energy storage power stations and other parties have not yet reached a value consensus. Diversified layouts to move forward Although the power lithium-ion battery is facing many doubts and difficulties in the tiered utilization, the pace of the entire industry in this direction has never stopped, constantly breaking through and growing. Many companies have gradually realized the importance of the echelon utilization of power lithium-ion batteries for my country's new energy automobile industry, and have expanded their layout in echelon utilization, and forged ahead in the controversy. According to incomplete statistics, BYD, CATL, AVIC Lithium, Xinwangda, GEM, ZTE Painer, Narada Power, Shanshan, Zhongtian Energy Storage, Camel, Mengshi Technology, Thornton New Energy, and Vision A group of power lithium-ion batteries and upstream and downstream companies such as Guoxuan Hi-Tech, Kelu Electronics, Pu Neng Company, etc. all have a layout in the field of power lithium-ion battery recycling. For example, Camel shares proposed in 2018 that it is expected to invest 5 billion yuan to build a power lithium-ion battery cascade utilization and reprocessing industrial park; Dongfeng Motor uses recycled battery energy storage equipment to deploy commercial energy storage, using peak-to-valley electricity price differences or renewable energy to charge , Provides power for electric vehicles and the society; Weimar Motors uses cascade batteries to develop a microgrid optical storage and charge-discharge integrated system statement: Some pictures and content of the articles published on this site are from the Internet, if there is any infringement, please contact to delete the previous article: lithium battery What is the important reason for the explosion