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How to establish a lithium manganese oxide lithium ion battery recycling mechanism

How to establish a lithium manganese oxide lithium ion battery recycling mechanism

Release date:2018-11-29 author: clicks:

While the new energy automobile industry is booming, the issue of power battery recycling has also become the focus of attention in the industry. After several years of development, the batch retirement period of new energy vehicles for ternary lithium-ion batteries is approaching. If a large number of decommissioned batteries cannot be properly recycled and utilized, it will not only lead to waste of resources, but also environmental pollution.


"With the establishment of the production responsibility extension system with the whole vehicle enterprise as the main body, the lithium iron phosphate lithium ion battery recycling industry has entered a critical period of channel construction." Department of Energy and Comprehensive Utilization of the Ministry of Industry and Information Technology, former Deputy Inspector, China Electronic Energy Saving Technology Huang Jianzhong, secretary general of the association, said at the 7th Symposium on Recycling and Recycling and Recycling of Automotive Power Battery on April 17 that the design and production of power batteries and the recycling, utilization and comprehensive utilization of used power batteries are currently in the process. Need to support and standardize the initial stage of development.


Industry pain points: high cost and weak economy


The retirement period for new energy passenger vehicles is usually 5 years, and passenger cars and commercial vehicles are 3 years. Before 2022, the decommissioned batteries will be dominated by lithium iron phosphate batteries. After 2022, the decommissioning of ternary batteries will be the same as that of lithium iron phosphate, and will gradually overtake. The theoretical decommissioning of power batteries for the year 2018 is expected to be 5.14 GWh, and the source of decommissioning is mainly new energy buses.


The reporter learned that the current ternary lithium-ion battery has been divided into five categories: traditional recycling companies, emerging recycling companies, battery PACK plants, battery materials companies and OEMs.


Different types of companies have different strengths and weaknesses. For example, traditional recycling companies have relatively superior advantages in recycling channels, material recycling technology, lithium iron phosphate lithium ion battery crushing technology and smelting technology. However, due to the lack of power battery sources, they still need to cooperate with OEMs and scrap factories. The advantages of emerging recycling companies are mainly reflected in battery breaking and dismantling technologies.


At present, the treatment methods of waste power batteries mainly include fire smelting technology and wet smelting technology. Wang Haibei, director of the Metallurgical Research and Design Institute of Beijing Mining and Metallurgy Technology Group Co., Ltd., said that the smelting process of the prior art is very complicated and the difficulty coefficient is very large.


"The smooth operation of the recycling system needs to be based on profit. If there is no profit-driven, it will not be able to fully enhance the enthusiasm of the company." Wang Haibei admits, "The investment in the existing recycling technology investment and recycling network construction is very large, despite the layout of many enterprises. I tested the water, but few companies dug up the big barrels of gold."


It should not be overlooked that the battery recovery process will produce toxic electrolytes and harmful gases, which will cause great harm to the environment and human health if not handled properly. "Some companies use high-temperature heating or burning in the process of handling, and it is easy to endanger the health of workers because of lax control." Ming Yuebin, general manager of Harbin Bartray Resources Recycling Technology Co., Ltd. pointed out.


Government companies work together to find a broken


In response to the above problems, relevant state departments have issued a series of industry policies to guide and standardize the power battery recycling industry.


In February of this year, the Ministry of Industry and Information Technology and other seven ministries and commissions jointly issued the "Interim Measures for the Management of Recycling and Utilization of New Energy Vehicles' Power Battery" to clarify the main responsibility of automobile production enterprises for power battery recycling. In March, the Ministry of Industry and Information Technology and other seven ministries and commissions jointly issued the "Notice on Organizing the Pilot Work of Recycling and Utilization of New Energy Vehicles' Power Battery", proposing to carry out power battery recycling in selected areas such as Beijing-Tianjin-Hebei, Yangtze River Delta, Pearl River Delta and Central Region. The pilot, centered on the pilot, radiated to the surrounding area.


"The issuance of the above notice indicates that China's recycling policy system is gradually being built." Yang Qingyu believes that "With the continuous breakthrough of related technologies, the release rate of lithium manganese oxide lithium-ion battery policy will accelerate, and the relevant standards are expected to be released this year. ”


The guests thought that the current battery type, battery capacity and voltage platform of the new energy vehicle are not different, which is the first hurdle for the utilization of the power battery ladder. Therefore, how to scientifically evaluate the decommissioned battery has also become the decision battery. The first level.


“The decommissioning battery evaluation process mainly collects the collected online and offline data and uploads it to the monitoring platform to analyze and process the lithium manganese oxide lithium battery, and evaluate the performance.” Li Pengfei, Technical Director of Beijing Craftcell Battery Technology Co., Ltd. It is pointed out that from the evaluation results, the ladder utilization value of the ternary battery is greater than the direct disassembly.


According to reports, after the qualification of the decommissioned battery is qualified, the step utilization section can be carried out to help the energy storage system improve the overall economy and maximize the cycle life of the lithium battery. At present, many enterprises have carried out demonstration projects for the use of ladders.


Zhang Xiang, vice president of marketing of Shanghai Xida New Energy Technology Co., Ltd. told reporters: "The original prediction of the utilization rate of battery ladder utilization is 3%-5%, but through the actual operation of the project, except for the cold weather, most of the charge The discharge data shows no attenuation, even lower than the decay rate of the new battery."


For the treatment of toxic gases, Ming Yuebin believes that the assembly line can be used to process the battery and the module as a whole, and the electrolyte is recovered as a whole. The separation technology is used to separate the material and the positive and negative powders, thus obtaining the final Metal housing. “Because the diaphragm is completely recycled, it does not become a harmful gas,” she added.


Deep cooperation in polishing the industrial chain


It is understood that the power battery recycling system involves many stakeholders such as car companies, battery manufacturers, battery recycling companies, etc., the chain is long, there are still many difficulties in the actual operation process.


In this regard, Xie Shaozhong, general manager of Jiangxi Haofeng Cycle Technology Co., Ltd. gave a suggestion: "All links in the industry chain need to be run in, but the overall principle should be 'professional people do professional things'. For example, car companies set up recycling channels, recycling After that, it will be handed over to the comprehensive utilization enterprise for professional treatment, and all links in the industrial chain will cooperate in depth."


It is reported that a number of enterprises have deployed power battery recycling and recycling of this blue ocean:


At the end of 2017, BAIC New Energy released the “Optimus Prime Plan”: By 2022, it is estimated that it will invest 10 billion yuan to build 3,000 optical storage and power stations across the country, with a total of 500,000 replacement vehicles, and energy storage batteries. Utilize more than 5GWh.


In January 2018, China Railway Tower Corporation and 16 companies including Sander Group signed a strategic partnership agreement for the recycling of new energy vehicles. China Railway Tower Company will use the power battery decommissioned by pure electric bus. After testing, sorting and reorganization, it will replace the lead-acid battery for communication base station.


"Either car companies or power battery companies are striving to implement the advanced concept of extending producer responsibility. It is hoped that all parties can explore the establishment of power battery recycling suitable for industries, enterprises and products from the perspective of corporate social responsibility. "The mode and mechanism." Huang Jianzhong pointed out, "If the finishing touch of the power battery is gradual utilization and resource disposal, then the establishment of recycling mode and mechanism will be its magic."

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