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Development of an Advanced Hybrid Energy Storage System for Hybrid Electric Vehicles
이백행,신동현,송현식,허훈,김희준 전력전자학회 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.1
Hybrid Electric Vehicles (HEVs) utilize electric power as well as a mechanical engine for propulsion; therefore the performance of HEVs can be directly influenced by the characteristics of the Energy Storage System (ESS). The ESS for HEVs generally requires high power performance, long cycle life and reliability, as well as cost effectiveness. So the Hybrid Energy Storage System (HESS), which combines different kinds of storage devices, has been considered to fulfill both performance and cost requirements. To improve operating efficiency, cycle life, and cold cranking of the HESS, an advanced dynamic control regime with which pertinent storage devices in the HESS can be selectively operated based on their status was presented. Verification tests were performed to confirm the degree of improvement in energy efficiency. In this paper, an advanced HESS with improved an Battery Management System (BMS), which has optimal switching control function based on the estimated State of Charge (SOC), has been developed and verified.
이백행(Baek-Haeng Lee),신동현(Dong-Hyun Shin),송현식(Hyun-Sik Song),김병우(Byeong-Woo Kim),김희준(Hee-Jun Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
There are lots of attempts in automotive field to supersede mechanical parts with electrical ones owing to increasing needs of drivers' safety, comfort and convenience as well as recent tightened environmental regulation. In addition, continuous improvements of semiconductor technology make it speed up to use electric components instead of conventional mechanical and hydraulic ones. In accordance with these tendencies, the demand of electric power and energy used in vehicle has been increasing steadily, and it will cause overburden of conventional 14V power generation and distribution system. A research on higher voltage system started in early 1990s and 42V power system has been introduced for a future automotive power-net. In this paper, technical trend in energy storage devices which implies one of the key technologies to implement 42V power-net is reviewed, and development results of the improved energy storage system consisted of ultracapacitor, battery and management controllers are presented.
마일드 하이브리드 차량용 복합형 에너지 저장장치의 성능개선에 관한 연구
李栢行(Back-Haeng Lee),申東賢(Dong-Hyun Shin),金熙峻(Hee-Jun Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.10
To improve the cycle-life and efficiency of an energy storage system for HEV, a dynamic control system consisted of a switch between a battery and an ultracapacitor module is proposed, which is appropriate for mild hybrid vehicle with 42V power net. The switch can be controlled based on the status of the battery and the ultracapacitor module, and a control algorithm that could largely decrease the number of high charging current peak is also implemented. Therefore the cycle life of the battery can be improved such that it is suitable for a mild hybrid vehicle with frequent engine start-stop and regenerative-braking. Also, by maximizing the use of the ultracapacitor, the system efficiency during high current charging and discharging operation is improved. Finally, this system has the effects that improves the efficiency of energy storage system and reduces the fuel consumption of a vehicle. To verify the validity of the proposed system, this paper presented cycles test results of different energy storage systems: a simple VRLA battery, hybrid energy pack (HEP, a VRLA battery in parallel with Ultracapacitor) and a HEP with a switch that controlled by energy management system (EMS). From the experimental result, it was proved the effectiveness of the algorithm.
42V 마일드 하이브리드 자동차용 에너지 관리장치 개발에 관한 연구
이백행(Baek-Haeng Lee),신동현(Dong-Hyun Shin),송현식(Hyun-Sik Song),김병우(Byeong-Woo Kim),김희준(Hee-Jun Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
환경 친화적인 자동차, 안전한 자동차, 편리하고 편안한 자동차 등에 대한 다양한 요구에 효과적으로 대응하기 위해 기존의 기계/유압식 자동차 부품들을 전기장치로 대체하기 위한 연구가 꾸준히 진행되고 있으며, 특히 반도체 기술의 발전에 의한 가격경쟁력 강화에 힘입어 신규부품 개발 분야를 중심으로 자동차 부품의 전기/전자화가 급격히 진행되고 있다. 이에 따라 자동차에서 사용되는 전기에너지의 소요도 지속적으로 증가하여 새로운 차량용 전원체계에 대한 연구, 개발의 필요성이 대두되었고, 1990년대 중반 미국의 MIT/Industry Consortium 등을 중심으로 선행연구가 진행되어 자동차용 42V 전원체계가 새로운 대안으로 제시되었으며, 아울러 연비개선을 위한 마일드 하이브리드 기능의 채용이 검토되었다. 본 논문에서는 42V 전원세계 및 마일드 하이브리드 시스템 성능 구현에 핵심적인 역할을 하는 에너지 저장시스템에 관해 소개하고, 마일드 하이브리드 운용에 적합한 에너지 관리장치 개발에 대해 간략히 소개하고자 한다.