Problems to be overcome in the development of power lithium-ion batteries in my country

my country’s power lithium-ion battery development must overcome this problem. At present, my country’s automotive power lithium-ion battery technology chooses the same lithium iron phosphate road, but the overall level of lithium battery technology still lags behind the United States and Japan. For example, the average energy density of Japanese batteries is 30% to 40% higher than that of Chinese batteries, and the number of charging times is several times that of Chinese batteries. my country's lithium battery industry has to overcome the following problems. (1) Intellectual property rights. The lithium iron phosphate cathode data patent was obtained in 1996 by the Goodenough team at the University of Texas. Canada's H-q and Phostech have obtained exclusive patents and commercial licenses. At present, carbon coating, metal oxide coating, nano-chemical modification and preparation technology are continuously developed to improve the conductivity of lithium iron phosphate powder, and a number of patents have been obtained. Therefore, the patent problem is a problem that domestic lithium iron phosphate processing companies avoid. (2) Common problems. The lithium batteries used in electric vehicles are connected in series or in parallel. If the common problems are not effectively solved, the processing of lithium batteries cannot be applied to electric vehicles on a large scale. (3) Safety and longevity after grouping. Large-capacity, high-charge-discharge power lithium-ion power lithium-ion battery packs, under harsh working conditions, are more likely to cause deviations in certain parts of the battery, thereby causing safety problems. The service life of a single lithium iron phosphate battery can exceed 2000 times, but after hundreds of individual batteries are connected in series and parallel, the service life of the entire battery pack may be only 500 times. Therefore, it is necessary to use a battery processing system (BMS) to process and control battery packs reasonably and effectively. (4) Compatible with high energy and high power. Lithium-ion power lithium-ion batteries have a high energy density, which can make electric vehicles run at a constant speed for longer. In the electrochemical system, only supercapacitors can achieve a very high charge-discharge ratio (1000C), but its energy density is only 1/20 of that of lithium batteries. If there is no supercapacitor, a high-capacity, high-power battery is not an ideal choice. (5) Screening of raw data. It is impossible to import all the raw data used to process lithium batteries, and it is important to import them from China. However, the domestic raw data must be certified by the world, and the output of the lithium battery can be recognized by the world, so now some issues need to be dealt with in the raw data certification link. As far as fuel power cells are concerned, it is necessary to industrialize them so that the cost of power generation (at that time was US$49/kW) is lower than or close to the price of fossil fuels (US$30/kW). In addition to the optimization of key components of the battery and the basic problems of assembly, the following technical barriers that limit the industrialization of fuel power cells must be overcome. (1) The cost of precious metals. After the industrialization of fuel power cells, their processing will lead to a shortage of precious metals. The alternative catalysts and multi-component catalysts at that time were far from meeting the technical requirements of industrialization. (2) Stability of fuel power cell stack. The service life of automobile fuel power battery system is still far below the world level, and the low temperature function of fuel power battery stack needs to be improved. (3) Establish and improve the industrialization infrastructure of fuel power batteries. After solving the problems of cost and functional stability, it is necessary to establish a network of liquid hydrogen technology facilities to maintain work. At that time, there were only about 60 hydrogen refueling stations in our country. In the field of hydrogen energy, my country lacks layout planning, capital investment, clear roadmap and timetable. (4) Further increase government support. The country should continue to increase the support and attention of fuel power cell research institutions, and encourage and guide the power of companies to enter the occupation of fuel power cells, and use capital and government investment effects to cause citizens and world capital to follow up and enter the fuel power cell industry. . Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Is there any danger in using lithium batteries while charging?