http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
주행환경을 고려한 배터리교환형 전기버스의 배터리 수명을 예측하기 위한 실험방법 고찰
주용호(Yongho Joo),김정용(Jeongyong Kim),박정인(Jungin Park),최웅철(Woongchul Choi) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
Among numerous efforts for successful deployment of electric vehicles in the market, public transportation sector has attracted plenty of interests from many government entities. One of the main reason for this attraction comes from the idea of tax money being used for public welfare and at the same time used for better environment. As a part of these efforts, a newly introduced battery swappable electric bus system has been under pilot program for almost a year now. This system uses a battery pack specifically designed for battery swapping stations located in certain intervals along the bus routes and the batteries in the system serve the system with a specific power and energy requirements. In this paper, an experimental method to identify the life time of the battery specifically for the said system is introduced. Also, a methodology to monitor aging characteristics of the battery is discussed under real life battery usage patterns.
전기자동차 시뮬레이션의 신뢰성 확보를 위한 리튬 이온 배터리의 모델링
주용호(Yongho Joo),김정용(Jeongyong Kim),김현준(Hyunjun Kim),최웅철(Woongchul Choi) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
With increasing concerns about the change of weather patterns and the depletion of energy resources, electrification of the transport system has been at the core of recent development of future vehicles using a renewable energy resource. One of the major research area of the electrification is a battery technology since the current state-of-the- art of the technology is still behind to meet the requirement from the electric vehicle applications. In the current paper, fundamental battery modelings were studied using a first order and second order Randle models. Modeling parameters were estimated with a small subset of experimental data for the discharging process. The identified parameters were validated with a data set of extended experimental results for both 1<SUP>st </SUP>and 2<SUP>nd</SUP> order models and the results were discussed in the current paper. In a separate study, SOC level and temperature data were also considered for the parameter identification and will be further analyzed and reported elsewhere. Ultimately, the model identified based on the early stage of battery will be used to diagnose the state of health of the battery based on the discrepancy between the realtime voltage measurement and the modeled voltage estimation.
전기자동차의 주행 환경을 고려한 전기자동차 배터리 성능 및 노화 테스트 시스템 개발과 고찰
박정인(Jungin Park),주용호(Yongho Joo),김현준(Hyunjun Kim),최웅철(Woongchul Choi) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
Electric vehicles were first developed way back in 1830s and became quite popular in 1910s. However, with the massive discovery of the crude oil in Texas and with the rapid development of IC engine vehicles, the EV disappeared due to its limited capacity of electric energy storage. As shown in the history, the main issue with the successful deployment of the EV is heavily related to the battery technology especially for its power and energy densities. In this paper, a battery test system is introduced. The test system is developed from scratch using a LabVIEW from National Instruments with appropriate hardware. The current test system is designed to accomodate electrical discharge and charge power profile derived from a specific driving cycle with a specific vehicle type. In other words, power profile can be chased every second to follow the vehicle driving cycle. With this setup, it is fully expected to evaluate batteries with load profiles under realistic driving conditions. Furthermore, it is also expected to test the battery to investigate the aging characterics under the realistic load conditions.
고도 변화를 포함하는 Driving Cycle에 대한 배터리 교환형 전기버스의 에너지 소비량 분석
김현준(Hyunjun Kim),김정용(Jeongyong Kim),주용호(Yongho Joo),최웅철(Woongchul Choi) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
Eminent changes of worldwide climate patterns due to rapid acceleration of global warming process warns the world to reduce the production of greenhouse gas such as CO₂ in one way or another. Many studies for the major sources of CO₂ have indicated that the automotive industry is one of the major responsible party. With such results, automotive researchers have made great efforts to alleviate the dependency on the hydrocarbon based fuels to reduce the CO₂ production by using alternative fuels or electricity. Among many techniques, electric vehicles attracts huge attention with rapid developments in power electronics and motor technologies as well as a battery technology. While the main electric powertrain technologies such as the power inverter, the motor controller and the traction motor make solid progress, the battery technology is still struggling to provide dependable energy storage system for the electric vehicle. With an obvious megatrend of urbanization, a public transportation system plays an important role in the efficient use of the transportation energy. A battery swappable smart electric bus has been developed to address this public needs as a one of the solution. In this paper, energy consumption of the battery swappable smart electric bus was studied in the real world driving condition with altitude variations. Energy simulations for the driving cycle obtained from the real experiment were performed with and without the grade change information. Furthermore, the comparison between the simulation results and the experimental results to highlight the importance of the use of driving cycles with the elevation changes.
배터리 교환형 전기버스 시스템을 활용한 전력저장장치(ESS)로서의 가능성 분석
김현준(Hyunjun Kim),김정용(Jeongyong Kim),주용호(Yongho Joo),최웅철(Woongchul Choi) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
Remarkable changes of worldwide climate patterns due to rapid acceleration of global warming process warns the world to reduce greenhouse gas such as CO₂. Many studies for the CO₂ issue have indicated that the automotive industry is one of the major factors. For this reason, researchers have made great efforts to alleviate the dependency on the hydrocarbon based fuels to reduce the CO₂ emissions by using alternative fuels or electricity. Among many techniques, electric vehicles attracts huge attention with rapid developments in power electronics and motor technologies. However the battery technology is still struggling to provide dependable energy storage system for the electric vehicle. With an obvious megatrend of urbanization, a battery swappable smart electric bus has been developed as a one of the solution to address the problem In this paper, for the purpose of ensuring the stability of power supply and demand at a particular region when the maximum power demand occurs the battery swappable smart electric bus system is proposed as a solution proven high leverage value as a public sector. As one of the methodology for this, in order to maximize the efficiency of energy use and eliminate the instability of power supply and demand, ESS of the battery swappable smart electric buses utilizing infrastructure of battery swapping system was analyzed for utilization as measures.