A study on battery characteristics for electrical propulsion vessels according to charging current and harmonic discharging load
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초록
The use of high energy density lithium batteries has increased for propulsion vessels. Methods for reducing their charging time have been widely studied. A very common method of rapidly charging a battery entails increasing the charging current. The power conversion system of electrically propelled ships comprises a converter and an inverter, operating via switching action. Thus, the output voltage and current often include harmonics. However, if the charging or discharging current of the battery includes harmonics or is too large, the life of the battery may be reduced. In this study, we investigate the aging characteristics of batteries according to the amount of charging current related to the discharging current with and without harmonics. The internal impedance of the battery is measured using electrochemical impedance spectroscopy to analyze battery aging.
Abstract
The use of high energy density lithium batteries has increased for propulsion vessels. Methods for reducing their charging time have been widely studied. A very common method of rapidly charging a battery entails increasing the charging current. The power conversion system of electrically propelled ships comprises a converter and an inverter, operating via switching action. Thus, the output voltage and current often include harmonics. However, if the charging or discharging current of the battery includes harmonics or is too large, the life of the battery may be reduced. In this study, we investigate the aging characteristics of batteries according to the amount of charging current related to the discharging current with and without harmonics. The internal impedance of the battery is measured using electrochemical impedance spectroscopy to analyze battery aging.
참고문헌 (8)
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