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title科学衛星PLANET-Cリチウムイオン電池の開発
Other TitleDevelopment of lithium-ion battery for the Venus Climate Orbiter PLANET-C
Author(jpn)大登 裕樹; 大平 賢治; 山本 真裕; 江黒 高志; 豊田 裕之; 鵜野 将年; 廣瀬 和之; 田島 道夫
Author(eng)Oto, Hiroki; Ohira, Kenji; Yamamoto, Masahiro; Eguro, Takashi; Toyota, Hiroyuki; Uno, Masatoshi; Hirose, Kazuyuki; Tajima, Michio
Author Affiliation(jpn)古河電池; 古河電池; 古河電池; 古河電池; 宇宙航空研究開発機構 宇宙科学研究本部; 宇宙航空研究開発機構 宇宙科学研究本部; 宇宙航空研究開発機構 宇宙科学研究本部; 宇宙航空研究開発機構 宇宙科学研究本部
Author Affiliation(eng)Furukawa Battery Co. Ltd.; Furukawa Battery Co. Ltd.; Furukawa Battery Co. Ltd.; Furukawa Battery Co. Ltd.; Japan Aerospace Exploration Agency (JAXA) Institute of Space and Astronautical Science (ISAS); Japan Aerospace Exploration Agency (JAXA) Institute of Space and Astronautical Science (ISAS); Japan Aerospace Exploration Agency (JAXA) Institute of Space and Astronautical Science (ISAS); Japan Aerospace Exploration Agency (JAXA) Institute of Space and Astronautical Science (ISAS)
Issue Date2008-05
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
宇宙航空研究開発機構宇宙科学研究本部
Publication title第27回宇宙エネルギーシンポジウム 平成19年度
The Twenty-seventh Space Energy Symposium
Start page11
End page15
Publication date2008-05
Languagejpn
AbstractLi-ion batteries, which have the advantage of high discharge voltage and high energy-to-weight ratios, have been studied energetically in recent years aiming at space applications in many countries such as Japan, the U.S. and France. Japan's asteroid explorer Hayabusa (MUSES-C: Asteroid Sample-return Spacecraft), which was launched in May 2003 and is on its way to the Earth hopefully with some samples collected at the asteroid ITOKAWA, is the world's first spacecraft powered by a Li-ion battery, from The Furukawa Battery Corp. The battery consists of 11 prismatic 13.2 Ah battery cells connected in series and has a specific energy of more than 85 Wh/kg. The bus voltage varies from 32.5 to 47.5 V during the battery mode according to the state of charge of the battery. On the basis of the battery technology for 'Hayabusa', we started developing the Li-ion battery for the Venus Climate Orbiter 'PLANET-C' in 2002. Since a further improvement in the mass advantage was requested for the mission, the enlargement of the capacity and the increase of the energy density were examined through the surface modification of an anode active material and the improvement of the separator. As a result, a 23.5 Ah class prismatic Li-ion battery of high energy density was made for trial purposes by 2004. We performed a life test keeping the battery fully charged under the float charge condition, and found that their aged deterioration was reduced by half from the battery for 'Hayabusa'. This aged deterioration test started in 2005 followed by a float charge test and a cycle life test. We also performed a test that simulated the planned charge and discharge operations for the 'PLANET-C' mission. The results allowed us to confirm that the capacity deterioration simulation used in designing the battery was valid. Currently we are investigating the most appropriate operational pattern of the battery that controls the state of charge according to the length of the eclipses keeping the deterioration minimum.
Keywordslithium ion battery; spacecraft power supply; storage battery; space technology experiment; PLANET-C; Venus Climate Orbiter; space exploration; Venus; accelerated life test; energy density; リチウムイオン電池; 宇宙機給電; 蓄電池; 宇宙技術実験; PLANET-C; 金星探査機; 宇宙探査; 金星; 加速寿命試験; エネルギー密度
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会
SHI-NOAA0063965003
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/28396


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