How to use power lithium-ion batteries in cascade

The average service life of power lithium-ion batteries is 5-8 years, and its performance decays as the number of recharges increases. When the battery capacity decays below 80% of the rated capacity, power lithium-ion batteries are no longer suitable for electric vehicles. However, the decommissioned battery can be further used in many areas such as energy storage, distributed photovoltaic power generation, household electricity, and low-speed electric vehicles after testing, maintenance, and reorganization. When the battery cannot be used in cascades, it must be recycled and disassembled for resource utilization. At present, there are two mainstream technology routes for power lithium battery material recovery, dry metallurgy and hydrometallurgy. GEM currently adopts the hydrometallurgical technology route and has realized the large-scale recycling and utilization of consumer-grade lithium batteries to extract metals such as cobalt and nickel. Once the power lithium-ion battery recovery terminal can increase the amount of energy, there is not much technology to realize the recycling and utilization of power lithium batteries. Obstacles. With the rapid increase in demand for power lithium-ion batteries, the market demand for lithium battery cathode materials continues to increase, and the utilization efficiency of renewable resources, recycling of metals such as nickel, cobalt, manganese and lithium in waste batteries to process cathode materials has become more economical. distinct. It is predicted that by 2018, the domestic power lithium-ion battery scrap recycling market will reach 63,900 tons, and by 2020 it will reach 248,000 tons. We can assume that there are several models to solve this: 1) Unified solution: similar to the battery processing company's model, build a large-scale solution plant, and uniformly solve the waste batteries of a certain company across the country. a. Advantage: It is the battery of the same company. The responsibility of the company is better defined. Private and large customers prefer a simple model. You can collect what you do. b. Disadvantage: The transportation cost and risk of used batteries throughout the country are very high, and they are used in tiers. Those who later sent to the place of use also faced this problem. 2) The echelon utilization and dismantling points of the overturned area based on the promotion and use area (core city): In this mode, part of the recycling is a. Benefits: Solve the problem nearby, guard against greater risks, and solve the battery Discarded vehicles are put together b. Disadvantages: To promote the city to take the lead in solving this matter, in principle, the responsibility is not particularly clear; the cost is relatively high. The core problem here is how long the battery will be retired, essentially echelon utilization and waste The solution to the solution model is different. The former is based on the health status of the original battery to make an assessment, give sufficient consideration to use, and reconstruct a set of use control strategies based on the old battery, which is a kind of value utilization; This is similar to garbage recycling. The value of recycling the useful metals in the battery and solving the harmful substances in the battery is equal. The most important thing is to ensure that the battery life will not cause excessive harm to the environment. The key goal of the echelon utilization is: 1.48V communication backup battery: This is the current model dominated by the iron tower company. 2. Solar distributed battery: Wind energy fluctuates too much. Relatively speaking, the distributed energy storage system of solar energy is more feasible. A certain degree of cascade utilization is beneficial to deal with the series of grid connection and scheduling faced by the random fluctuation of distributed power generation. Difficulty 3. DC charging station charging battery: smooth the power demand of DC charging station 4. UPS battery: this competition with lead-acid batteries, the chance of winning is not big. Statement: Some pictures and content of articles published on this site are from the Internet, if any Infringement, please contact to delete the previous article: What are the advantages and disadvantages of cylindrical lithium batteries?