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윤창오,이평연,장민호,유기수,김종훈 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.71 No.-
This study elaborately analyzes the lithium-ion battery pack in series and parallel connection installed inspace applications through environmental tests that typically composed of three tests: half-sine shock,sine vibration and random vibration. These tests are well conducted based on the internal certificationstandard and the space industry standard. Above all, from basic equivalent electrical circuit modeling ofthe high-power 18650-HE4 cell based series/parallel battery packs of 4S4P with rectangular and cubetypes, some internal parameters were minutely extracted and compared to check which environmentaltest adversely affects the battery pack’s electrochemical characteristics and its electrical performance. Moreover, maximum/minimum cell voltages and their differences measured in four series point andinternal temperature measured infive points inside the two battery packs are compared. For reference, inorder to analyze the impact of the battery pack clearly, this study further analyzed some single cells withvarious impacts through identical environmental test profiles. Above analyses and comparisons can helpto get a solution forfinding a suitable shape for space application with a parameter change rate accordingto the different shape of the battery pack. In particular, the necessity of a modified equivalent electricalcircuit modeling of the battery pack varied by environmental tests can be sufficiently suggested. Accurateinformation on internal parameters of the cell and battery pack contributes to the high-fidelity state-ofcharge(SOC) estimation and state-of-health (SOH) prediction in vibration and shock environments suchas electric vehicle (EV), satellites and space-launch vehicles.
윤창오,김용경,정순성,이정재 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1
It is recent trends that residents in office building demand more healthy and comfortable environment. To supply these good environment, The personalized air-conditioning system what can make thermal environment optimal has been researched. In this paper, we suggest the validity of a Personal Air-Conditioning System, and design Personal Air-conditioning System with specification guided by indoor environmental characteristics analyzed through the experiment.
인공위성용 리튬이온 배터리의 잔존 수명 및 내부 파라미터 분석
윤창오 ( Chang-o Yoon ),김종훈 ( Jonghoon Kim ),문은아 ( Eun-a Moon ),김기현 ( Ki-hyun Kim ) 조선대학교 공학기술연구원 2017 공학기술논문지 Vol.10 No.1
This researches introduces the lifetime prediction and internal parameter analysis of lithium-ion cell for spacecraft application such as satellite and launch vehicle. Two kinds of lithium-ion cylindrical cells (18650 type; 2.5Ah, 26650 type; 3.5Ah) with high-power characteristics were used. With increased cycling, discharge capacity and hybrid-pulse power characterization (HPPC)-based internal resistances were measured and compared with that of fresh lithium-ion cell. From these results, it can be surely expected to predict the lifetime of lithium-ion cell and to provide good solution for well-established lithium-ion battery pack in satellite and launch vehicle.