New energy vehicles are one of the seven emerging industries and have become an important breakthrough for the country to revitalize the economy and transform the industrial structure. The development of new energy vehicles is an important part of the low-carbon economy and plays an important role in easing the contradiction between energy supply and demand, improving the environment, and promoting sustainable economic development.
New energy vehicles are one of the industries that best reflect a country's technological development level, independent innovation capabilities and international competitiveness. It promotes my country's transportation energy transformation and realizes my country's transformation from a major automobile production country to one through energy diversification, power electrification and clean emissions. The transformation of an automotive technology powerhouse. In the draft of the "Automobile and New Energy Vehicle Industry Development Plan" (2011-2020) issued by our country, the central government will invest hundreds of billions of yuan to support the research and development and promotion of core technologies for energy-saving and new energy vehicles, making our country a global As the largest producer of new energy vehicles, China has kept pace with or is at the leading level with developed countries in terms of new energy vehicle production technology. China has made electric vehicles the top priority in the development of new energy vehicles and is the first step in the development of new energy vehicles. Main direction of attack. The power source of electric vehicles is the battery, which is a mobile energy source composed of anode, cathode and electrolyte. During charging, ions flow out from the positive electrode and flow to the negative electrode through the electrolyte. During work or discharge, the positive electrode and the negative electrode undergo opposite electrochemical reactions, and the resulting voltage drop drives the external load to make the car run.
The power battery used in electric vehicles is a lithium battery: the positive electrode is lithium iron phosphate (lithium cobalt oxide LiCoO2, or lithium manganese oxide LiMn2O4 or ternary compound Li(NiCo)O2) coated on aluminum foil, but lithium iron phosphate is the best . The negative electrode is copper foil coated with graphite or lithium titanate. There is a separator between the positive and negative foils, which are wound together. Put the rolled positive and negative sheets (including separators) into the battery case together, inject electrolyte, and then vacuum seal to complete the production of a single battery.
The procurement cost of lithium battery cathode materials accounts for 30%, anode materials account for 20%, separator materials account for 20%, electrolyte accounts for 20%, and casing accounts for 10%. The diaphragm is polyacrylic. The cathode material has a great influence on battery performance (referring to the lithium compound coated on the aluminum foil), and the entire cathode is the most critical part of the battery. The development of the new energy automobile industry is not only related to national energy security, people's livelihood and environmental protection, but also the fate of the development of my country's automobile industry. The positive electrode of lithium batteries for electric vehicles requires aluminum foil, and the vehicle itself is required to be as light as possible. Aluminum is currently the preferred material for lightweighting automotive parts. Aluminum plays a vital role in the development of electric vehicles and hybrid vehicles. It is predicted that the number of electric vehicles in China will account for more than 30% of the total number in 2030. China's new energy (20.82, -0.37, -1.75%) automobile industry has opened up a new application field for the application of aluminum, with great potential. The dosage is considerable. Lithium battery anode aluminum foil has no special requirements for the performance of the aluminum foil, and the Chinese aluminum foil industry can fully meet all requirements for this foil.
