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LLC 공진형 컨버터를 사용한 2kW급 배터리 충전기 모델링 Modeling of 2kW Electric Bicycle Battery Charger Using LLC Resonant Converter

임성준, 정민창, 김재혁
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한국기계기술학회지 (韓國機械技術學會誌)
제27권 제2호 (2025.04)
pp.225-230
한국기계기술학회 (Korean Society of Mechanical Technology)
초록

This paper presents an 2 kW commercial Li-ion(lithium-ion) battery model using PSIM simulation. An in-house designed transformer was employed to measure the leakage and magnetic inductance and determine the resonant frequency. The LLC resonant converter’s transfer function was derived using the FHA method, and voltage gain characteristics were analyzed concerning frequency, Q factor, and inductance variations. The CC-CV charge mode was evaluated at different C-rates, targeting the charging voltage for e-bikes. The results demonstrated that battery voltage increased with SOC until reaching the final charging voltage.

키워드
배터리 충전LLC 공진형 컨버터CC-CV 충전변압기 설계 Battery chargingLLC resonant converterCC-CV chargingTransformer desing
목차
Abstract
1. 서 론
2. 본 론
    2.1 변압기 코어 크기 선정
    2.2 LLC 공진형 컨버터 모 델링
3. 시뮬레이션
4. 결 론
후 기
References
저자
  • 임성준(Dept. of Electrical Eng., Wonkwang University) | SeongJun Lim
  • 정민창(CEPT Co., Ltd.) | MinChang Jeong
  • 김재혁(Professor, Dept. of Electrical Engineering, Wonkwang University) | Jaehyuck Kim Corresponding author