The research of lithium ion batteries in China. The project has been the key project of the national "863", most of the material to achieve the localization, the country has built and the introduction of a number of production lines, supporting material factory have more than one, has formed a large-scale production.
1, power lithium-ion battery industry is currently in the period of import for a long time, many developed countries take electric vehicles as the main capture target, the United States supports multiple national laboratories and enterprise share vehicle lithium ion battery development work. The European Union has developed a high energy storage battery development plan, the use of planning and planning means to ensure that the basic research of continuous * * *, and continue to produce stage results. Japan has a monopoly in the field of lithium ion batteries, SONY, SANYO electric, Matsushita batteries, NEC and other well-known companies have built large-scale lithium-ion battery manufacturing plant, and most manufacturers in addition to maintain and expand the original brand production, with their respective advantages to develop new products of lithium ion battery. On the whole, Japan is still the leading power lithium-ion battery technology countries, and its power lithium-ion battery and its key material production technology has matured, * * * can almost meet the needs of electric vehicles.
Over the past 10 years, China's lithium battery industry has developed from scratch, from small to large, developed rapidly, production capacity is second only to japan. Research and development project of China's lithium ion battery has been a key project of the national "863", most of the material to achieve the localization, the country has built and the introduction of a number of production lines, supporting material factory have more than one, have been the formation of large-scale production, market competition, is the main industrial investment promotion.
2, lithium-ion power battery products applications, lithium-ion power battery products first used in electric bicycles, has entered the market in bulk. The car battery, home also has a lithium ion power battery has a plurality of unit loading demonstration operation, but the overall level is the real commercial is the distance, single cell life and consistent on * * * and the Japanese products have obvious difference, the battery management system and battery technology level also needs to be improved, the level of key materials and the industrial capacity also needs to be further improved.
After several years of research and development of lithium-ion battery power countries have made great progress, mainly is the cathode material of lithium iron phosphate and lithium, in capacity, security, and other aspects of the life cycle of * * * have been fully able to meet the requirements of power equipment, electric bicycle, electric hybrid vehicles, pure electric vehicles, electric boat UPS, power and other energy storage devices have been used, but the large volume applications also need some time, probably in these two years. Domestic and foreign enterprises are staring at this big cake, have put into research and industrialization, hoping to get huge returns in the future.
As electric cars, electric bicycles, electric tools such as mobile power battery for energy development core components of the electric appliances become the key factor for the development of electric vehicles, thus increasing the research and development of battery and its related materials has important significance.
The battery of lithium ion battery has the characteristics of light weight, small volume, long service life, high voltage and no pollution, "the ultimate battery", which is widely favored by the market, gradually replace the nickel metal hydride, nickel cadmium battery etc.. From the angle of the positive electrode material used in the lithium-ion battery, the current lithium ion battery can be divided into lithium cobalt acid battery, three yuan material battery, lithium manganate battery and lithium iron phosphate battery. Mobile phone, notebook computer, the battery is cobalt acid lithium batteries and battery materials three yuan, this is because the lithium cobalt oxide and three element energy ratio is relatively high, can be more electrical energy stored in a smaller volume, but it's safe to * * poor, so is only applicable to small battery. Although the specific energy of lithium manganese phosphate and lithium iron phosphate is lower, but the safety level is higher, so it is more suitable for the middle capacity of the power battery, which is already a relatively internationally accepted technology choice. The large-scale applications of large power batteries still need to be developed with flame retardant electrolyte, high melting point diaphragm and high stability * charging negative electrode materials.
Due to the cycle of * * lithium iron phosphate battery with high safety, good can also * *, the cost is far lower than the lithium cobalt oxide, lithium nickel oxide and three element material, although its cost is much higher than that of lithium manganate battery, but if the output is large, and is expected to drop to the level of lithium manganate, because lithium iron phosphate in the iron and phosphorus as raw material, its rich source, low price, it is expected in the next few years in large quantities used in lithium-ion battery.
Power lithium-ion batteries are now in the introduction of the industry. Battery related technologies have matured and each has its own features. Many testing standards are in progress and moving towards mass production. Battery packs and battery management systems are not standardized and are in their own development.
The development of Li ion power battery involves battery manufacturing, application and market approval. As far as battery manufacturing is concerned, it is now possible to produce power lithium-ion batteries that meet different needs, including a variety of electric vehicles, power tools and so on. However, its extensive application still needs market recognition. At present, some European and American companies have started purchasing power lithium-ion batteries for electric tools and electric vehicles, and the domestic applications are also in the initial stage. At the Eighth China International Battery Technology Exchange Exhibition (CIBF2008) in Tianjin, several companies have demonstrated their application in automotive start-up and electrical engineering
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