lithium ion battery, life, accelerated life test, space technology experiment, geosynchronous orbit, storage battery, spacecraft power supply, electric discharge
その他のタイトル（英）
Long term life evaluation for large scale lithium-ion cells for space use
GS Yuasa Technology Ltd. Large-scale Lithium-ion Battery Engineering Department
GS Yuasa Technology Ltd. Large-scale Lithium-ion Battery Engineering Department
GS Yuasa Technology Ltd. Large-scale Lithium-ion Battery Engineering Department
GS Yuasa Technology Ltd. Large-scale Lithium-ion Battery Engineering Department
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
第27回宇宙エネルギーシンポジウム 平成19年度
雑誌名(英)
The Twenty-seventh Space Energy Symposium
ページ
1 - 5
発行年
2008-05
抄録（英）
GS Yuasa Technology (GYT) had developed large capacity lithium ion cells for space applications in 1999. The chemical design of the cell was fixed at that time and it has not changed up to now. Since satellite applications require very long life and the replacement during missions is impossible, it is very important to evaluate life characteristics of the cell. GYT established a capacity estimation formula under consideration of two major capacity loss mechanisms from matrix life tests. The estimation method makes it possible to estimate cell life in any missions. On the other hand, GYT has performed many life tests which simulate actual satellites missions since the cell development. These tests have reached the end of the required mission shown as follows. (1) 40 seasons (20 years): Semi-accelerated GEO (Geostationary Earth Orbit) (max. 80 percent DOD (Depth Of Discharge) (2) 30 seasons (15 years): Semi-accelerated GEO (max. 70 percent DOD) (3) 40,000 cycles (7 years): LEO (Low Earth Orbit) 25 percent DOD. From these results, GYT confirmed that the cells can meet general requirements of life performance for GEO and LEO.
宇宙用大型リチウムイオン電池の長期寿命評価
