Analyze the application of lithium-ion batteries in the aerospace field

Application of lithium-ion batteries in the aerospace field. Batteries used in the aerospace field must have the characteristics of high reliability, good low temperature performance, long cycle life, high energy density, small size, and light weight to reduce launch costs. From the performance characteristics of current lithium-ion batteries (such as low self-discharge rate, no memory effect, large specific energy, long cycle life, low-temperature performance, etc.), lithium-ion batteries are better than original cd-ni batteries or zinc/Ag2O batteries The combined power supply is much better. Especially from the perspective of miniaturization and lightweight, it is of great significance to the development of aerospace devices. Because the mass index of aerospace components is usually not calculated in kilograms, but in grams. In addition, zinc/Ag2O batteries must be replaced every 12 to 18 months, while lithium-ion batteries have a service life that is more than 10 times longer. The application of lithium-ion batteries in the field of space power has entered the engineering application stage. So far, more than a dozen spacecraft have used lithium-ion batteries as energy storage power. The following is some of the information collected. The strv-1d spacecraft launched on November 16, 2000 used lithium-ion batteries for the first time, with a specific energy of 100W•h/kg. The satellite, launched on October 22, 2001, also uses lithium-ion batteries to store energy. The spacecraft is equipped with 3 scientific instruments, weighing only 95 kg, and 6 9A•h lithium-ion batteries with a mass of 1.87 kg and a specific energy of 104W•h/kg. 400 charge-discharge cycles are performed every month, and the depth of discharge is 8%~15%. According to the 30% DOD low orbit system, the ground test has carried out 16,000 cycle life evaluations. The battery discharge voltage has been reduced from 23V to 22.2V, and the cycle life performance is excellent. The Rosetta platform project launched by the European Space Agency (ESA) in 2003 also used lithium-ion battery packs. The battery pack has an energy of 1070W•h, divided into three modules, with a mass of 9.9kg and a specific energy of 107w•h/kg. The Rosetta lander also uses lithium-ion batteries for energy storage, with a mass of 1.46 kg and a specific energy of 103w•h/kg. The energy storage power source of the Mars Express project launched by the European Space Agency (ESA) in 2003 also uses lithium-ion batteries. The energy of the battery pack is 1554W•h, the mass of the battery pack is 13.5kg, and the specific energy is 115W•h/kg. In the ground simulation experiment, 9280 cycles were carried out, and the discharge depth was 5%~67.55%. The Mars Rover Hound 2 also uses lithium-ion batteries. In addition, NASA’s Valor and Opportunity satellites launched in 2003 also used lithium-ion batteries, and the European Space Agency (ESA) plans to use lithium-ion batteries to store energy on 18 other spacecraft. Lithium-ion batteries have outstanding advantages over other batteries in terms of specific energy and specific power. Since its development in the early 1990s, lithium-ion batteries have become the battery system with the best overall performance. In particular, the development of polymer lithium-ion battery technology has further broadened the application range of lithium-ion batteries due to its advantages of lightness, thinness, batteries that can be designed into any shape and good safety. The production and sales of lithium-ion batteries have maintained a rapid increase. In the 1990s, lithium-ion batteries tended to be used in portable electronic products. With the improvement of battery design technology and the emergence of new materials, the application range of lithium-ion batteries continues to expand. Citizens have expanded from information products (mobile phones, PDAs, notebook computers, etc.) to energy transportation (electric vehicles, grid peak shaving, solar energy, wind energy can be stored in power stations), military coverage of the sea (submarines, underwater robots) , Land (Army Soldier System, Robot Warrior), Sky (Unmanned Aerial Vehicle), Air (Satellite, Spacecraft), etc. Lithium-ion battery technology is not only an industrial technology, but the development of related information industries is one of the foundations for the development of the new energy industry, and has become one of the important food indispensable for modern and future life and military equipment. 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: How long is the life of the lithium-ion battery for electric vehicles?