Echelon utilization of power lithium battery -Lithium - Ion Battery Equipment

Echelon utilization of power lithium battery -Lithium - Ion Battery Equipment

As of 2017, the total number of new energy vehicles promoted in my country has exceeded 1.8 million, the energy density of power batteries has tripled compared to 2012, and the price per kilowatt-hour has dropped by more than 70%. Data show that in 2020, it is expected that China's domestic automotive power battery recycling will reach 257,000 tons, and this figure will reach 422,000 tons in 2022.

With the rapid development of new energy vehicles, the decommissioning of power batteries in my country will gradually become large-scale. After the decommissioning of vehicle power batteries, it is necessary to consider their cascade utilization and recycling. Experts from the industry have mentioned the issue of power battery recycling, among which "echelon utilization" has become a high-frequency word.(Lithium - Ion Battery Equipment)

So, how to carry out the cascade utilization of power battery? Where do the retired power batteries go?

Liu Yanlong, Secretary-General of China Chemical and Physical Power Industry Association, said that after the power battery is retired from electric vehicles, 80% of the capacity can be used, so it is necessary to attach great importance to the cascade utilization of power batteries.

Liu Yanlong emphasized that in order to carry out cascade utilization, we must first understand the quality and safety performance of retired batteries. Battery companies should establish a big data traceability system platform, and battery testing and evaluation methods. Big data should include the production data of battery cell research and development, battery pack research and development production data, battery pack on-board operation monitoring data, etc. The health evaluation of retired batteries is carried out through big data to determine whether the battery can enter the cascade utilization market.

In addition, it is also necessary to pay attention to the standardization of battery cells and battery packs. The use of single cells with fewer specifications within an enterprise can not only improve the level of production automation to reduce costs and improve product consistency, but also facilitate future use of cascades. dismantling and reorganization. Therefore, in the power battery design stage, preparations must be made for the subsequent cascade utilization and dismantling and recycling.

Of course, not all power batteries are suitable for cascade utilization. Wu Hui, research director of the Yiwei Economic Research Institute, pointed out that because the ternary power battery contains rare metals such as nickel, cobalt, and manganese, lithium, cobalt, nickel, manganese, copper, aluminum, graphite, diaphragm and other materials are extracted by dismantling. It can realize economic benefits of about 42,900 yuan per ton, thus realizing economic feasibility. However, if the lithium iron phosphate battery is scrapped and dismantled, it can only achieve an economic benefit of about 9,300 yuan per ton, which is difficult to cover its recycling cost. Therefore, the lithium iron phosphate power battery is more suitable for cascade utilization.

So where is the battery after the cascade utilization used? "After recycling retired batteries, we applied them to the field of energy storage. After cascade utilization, the batteries will eventually be taken back for dismantling, recycling, physical sorting using automated technology, and finally returning to raw materials." BYD Battery Business Group Second Division Director Zhang Chunyu pointed out that taking BYD as an example, the cathode material lithium iron phosphate, ternary materials and our anode materials are being recycled as a whole at this stage. At present, the feasibility study has been completed, and a certain-scale recycling production line has been established.

The operation mode of power battery cascade utilization is a problem that is constantly explored in the industry. At this conference, the person in charge of a power battery company said that building an energy storage power station or continuing to use it on low-speed electric vehicles may be a feasible direction for the cascade utilization of power batteries. "At present, whether it is a large-scale energy storage system or a small-scale energy storage system, in general, the power battery will be used more in the energy storage in the cascade." He said.



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