@inproceedings{oai:jaxa.repo.nii.ac.jp:00007992,
 author = {大平, 賢治 and 大登, 裕樹 and 山本, 真裕 and 井奈福, 浩之 and 豊田, 裕之 and 鵜野, 将年 and 廣瀬, 和之 and 田島, 道夫 and Ohira, Kenji and Ooto, Hiroki and Yamamoto, Masahiro and Inafuku, Hiroyuki and Toyota, Hiroyuki and Uno, Masatoshi and Hirose, Kazuyuki and Tajima, Michio},
 book = {宇宙エネルギーシンポジウム, Space Energy Symposium},
 month = {Jun},
 note = {第28回宇宙エネルギーシンポジウム(2009年3月9日, 宇宙航空研究開発機構宇宙科学研究本部相模原キャンパス), The twenty-eight Space Energy Symposium (March 9, 2009. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara), In recent years, lithium-ion batteries having high discharge voltage and high energy density have been studied in many countries including Japan, the United States, and France for use as power supplies for spacecrafts. A lithium-ion cell having rated capacity of 13.2 Ah - developed for use in a spacecraft by The Furukawa Battery Co. Ltd. and the first of its kind in the world - is onboard "HAYABUSA", a planet exploration spacecraft developed by the Japan Aerospace Exploration Agency (JAXA) launched in May 2003. It is returning to the earth after touching down on the asteroid "ITOKAWA" to get samples from the surface. Based on fundamental technologies used in the battery cells for "HAYABUSA" and for preparation for mounting on the "PLANET-C" Venus probe scheduled for launch in spring 2010, we modified various performance parameters and developed a revised 23.5 Ah class lithium-ion cell. We produced a prototype model cell with space specifications and performed assessment of adaptability of performance of the cell to the "PLANET-C"  mission, assessment of durability in mechanical environments, and of safety. Assessment testing of adaptability to the mission is a test in which actual operating conditions of "PLANET-C" are simulated for assessment of storage from completion of the cell until launching of the satellite, floating charge characteristics from launching of the satellite to arrival to Venus, and charging/discharging cycle characteristics from arrival of the probe to Venus to the mission end. Evaluation of durability in mechanical environments consists of random vibration testing, sinusoidal wave vibration testing, and pyrotechnic shock testing. Through these assessments, we surveyed whether the developed cell's structure can sufficiently withstand vibrations and impacts occurring during launching of "PLANET-C". Furthermore, we performed overcharge testing and external short-circuit testing as safety assessment tests. Assessment of its adaptability to its mission is continuing: all cells subjected to testing have exhibited good progression. Results of assessments of durability in mechanical environments have revealed no failure or abnormal heat generation of the cell in any test. No cell abnormality such as a sudden drop of cell voltage has occurred. Safety assessments have confirmed that fracture, ignition, actuation of the pressure relief valve and a sudden temperature rise did not occur in either the overcharge test or the external short-circuit test., 資料番号: AA0064295001},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)},
 title = {科学衛星PLANET-Cリチウムイオン電池の開発(その2)},
 volume = {28},
 year = {2009}
}