Power lithium battery don't be in a hurry -Lithium - Ion Battery Equipment

Power lithium battery don't be in a hurry -Lithium - Ion Battery Equipment

The leap-forward rise of my country's new energy vehicle industry has promoted the rapid development of power lithium battery technology. On August 1, the "Interim Regulations on the Traceability Management of Recycling and Utilization of New Energy Vehicle Power Batteries" (referred to as "Recycling Traceability Regulations") will be officially implemented, emphasizing the implementation of the extended producer responsibility system and requiring automobile production companies to assume the main responsibility for power battery recycling. This regulation brings good news for preventing resource waste and environmental pollution.(Lithium - Ion Battery Equipment)

Wu Feng, academician of the Chinese Academy of Engineering and director of the Green Energy Research Institute of Beijing Institute of Technology, said in an interview with reporters that to develop the lithium battery industry, it is necessary to do a good job in the research and development of advanced battery technology and the efficient use of lithium resources. Regarding the recycling of power lithium batteries, green recycling technology should be used as much as possible to prevent secondary pollution to the environment.

Frontier breakthrough requires multi-party progress

As early as 2000, when my country's electric vehicle project was launched, Xu Guanhua, then minister of science and technology, pointed out that the key to electric vehicles is the battery. At present, lithium-ion batteries have become the focus of attention of all parties. In Wu Feng's view, lithium-ion batteries have the advantages of large specific energy, long cycle life, good safety performance, and fast charge and discharge, making related technologies and key materials a hot spot in the current international competition for research and development, and a new generation of information A key link in major applications such as communications (5G), electric vehicles, energy storage power stations, and security. It has been reported recently that the X-57 pure electric aircraft project being developed by NASA has been in progress for three years, and will soon achieve its maiden flight and achieve zero emissions in the air. The future commercialization will require breakthroughs in battery technology.

my country's new energy vehicle subsidies have shown a trend of de-subsidy. This year, the Ministry of Finance, the Ministry of Industry and Information Technology, the Ministry of Science and Technology, and the National Development and Reform Commission jointly issued the "Notice on Adjusting and Improving Financial Subsidy Policies for the Promotion and Application of New Energy Vehicles". energy density requirements. Wu Feng believes that the development of power lithium batteries and new energy vehicles must strive to meet the development needs of the market. The state's move is intended to encourage the development of high-energy-density batteries to achieve longer cruising range for new energy vehicles and meet further market demands. In 2020, the subsidy is about to be cancelled, and it is imperative to find a way to make batteries and new energy vehicles better adapt to the development and demand of the market.

Since the "Thirteenth Five-Year Plan", the development trend of energy density indicators of power lithium batteries has become higher and higher. In 2015, the energy density index of the power lithium-ion battery was 120-180 Wh/kg, and the material system was mainly lithium iron phosphate-graphite and ternary material-graphite. In the near future, the energy density index of the new generation of power lithium-ion batteries in 2020 is: the lithium-rich material-silicon carbon anode system cell is 300 Wh/kg. In the medium and long term, 400 watt-hours/kg should be achieved in the medium-term (2025), and 500 watt-hours/kg in the long-term (2030). In recent years, the key materials and technologies of batteries have made significant progress, but there is still room for improvement. This refers to the improvement space of comprehensive performance, including battery safety, energy density, power density, life, cost, etc. Only when the overall performance of the battery is improved can it better meet the development of the new energy vehicle market.

From a technical point of view, lithium-ion batteries should be able to achieve high specific energy simply, but it is difficult to achieve high index industrialization, because various conditions must be considered. Wu Feng believes that by using ternary cathode materials and silicon carbon anode materials, a high specific energy lithium-ion battery with an energy density of 319 Wh/kg can be prepared. However, the improvement of the energy density of power lithium-ion batteries is not only related to the positive and negative electrode materials, but also the requirements for the electrolyte used are getting higher and higher.



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