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Lithium ion batteries in the field of aerospace applications

by:UFO      2020-05-11

used in battery must be in the field of space high reliability, low temperature performance is good, long cycle life, high energy density, small volume and weight, in order to reduce launch costs. From the current lithium ion battery has the performance characteristics of the ( Such as small self-discharge, no memory effect, specific energy, long cycle life, good low temperature performance, etc. ) Lithium ion battery than the original Cd - Ni battery or zinc/joint power of Ag2O battery power is much more superior. Especially from the perspective of the miniaturization, lightweight for the devices is quite important. Because the quality index of the aerospace devices often is not calculated on kg, but is calculated by the gram. And zinc/Ag2O battery must be replaced every 12 to 18 months, and the life of the lithium ion battery compared with more than ten times longer. Internationally in the field of lithium ion battery power supply in the space application has entered the stage of engineering application. There are a dozen spacecraft to the lithium ion battery as energy storage power. The following is part of the data collected. On November 16, 2000 launch STRV - 1 d spacecraft for the first time used the lithium ion battery, the spacecraft of the lithium-ion batteries used in specific energy of 100 w. h/kg. On October 22, 2001 launch satellites using lithium ion batteries as their energy storage power supply. The quality of scientific instruments of the spacecraft with three parts are only 95 kg, with 6 section 9 a. h lithium-ion battery pack, the quality of 1. 87 kg, specific energy of 104 w. h/kg. 400 times monthly charge and discharge cycle, discharge depth is 8% ~ 15%. Ground experimental system for the press 30% DOD low orbit 16000 times cycle life assessment, discharge voltage of the battery pack from 23 v down to 22. 2 v, show the excellent cycle life performance. In 2003 the European space agency ( ESA) Launch platform for the ROSETTA project also USES a lithium-ion battery pack, the energy of the battery pack is 1070 w. h, divided into three modules, quality of 9. 9 kg, specific energy of 107 w. h/kg. ROSETTA platform of the lander also USES the lithium ion battery as energy storage power, the quality of the battery pack is 1. 46 kg, specific energy of 103 w. h/kg. In 2003 the European space agency ( ESA) Launch in 2003, the Mars express project also USES the lithium ion battery energy storage power supply the energy of the battery pack is 1554 w. h, the quality of the battery pack for 13. 5 kg, specific energy of 115 w. h/kg. The ground simulation experiments conducted a 9280 - cycle, discharge depth is 5% ~ 67. 55%. Mars lander - — Hunting 2 also adopted the lithium ion battery. In addition, the U. S. space agency ( NASA) Launched in 2003 the spirit and opportunity, satellite detector also adopted the lithium ion battery, European space agency ( ESA) Plan and 18 spacecraft using lithium ion batteries as energy storage energy.

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