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Other TitleOvercharge tolerance test of lithium ion battery
Author(jpn)平山 寛; Kim, Ieyoung
Author(eng)Hirayama, Hiroshi; Kim, Ieyoung
Author Affiliation(jpn)九州大学; 九州大学
Author Affiliation(eng)Kyushu University; Kyushu University
Issue Date2008-05
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
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 page31
End page35
Publication date2008-05
AbstractThis study shows overcharge tolerance of lithium ion battery for ground use, in order to use it for a small satellite. Kyushu university, Kyushu institute of technology and Fukuoka institute of technology are developing a polar plasma observation satellite 'QSAT'. QSAT is a small satellite of 50 kg in mass, designed to be launch as a piggy-back payload of H-2A. Most components of QSAT are made of COTS (Consumer Off The Shelf) products. They must be examined for space use because they are qualified only for ground use. We had examined a candidate product of lithium ion secondary battery in launch and operation environment. And then in this study, we examined its tolerance against overcharging because lithium ion battery will inflates and sometimes explodes in overcharging. The battery as a specimen was forced to be overcharged without its built-in safety circuit, and we measured its inflation with a strain gage during charging and discharging. After 15 hours of charging, the battery inflated twice in thickness but it bore without explosion nor leakage. Although this single experiment is not enough to guarantee that the battery never explode in QSAT, it showed some tolerance against overcharging.
Keywordsovercharge; lithium ion battery; tolerance; exothermic reaction; small scientific satellite; piggyback system; energy density; damage; 過充電; リチウムイオン電池; 耐性; 発熱反応; 小型科学衛星; ピギーバックシステム; エネルギー密度; 損傷
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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