TY - CHAP U1 - Konferenzveröffentlichung A1 - Zhou, Wenqi A1 - Wattenberg, Martin A1 - Schwalbe, Ulf T1 - Design considerations of a single stage LLC battery charger T2 - PCIM Europe : International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Nuremberg, 7-9 May 2019 : proceedings N2 - Usually battery chargers have two stages and DC charging current is considered to by necessary for a proper charging. To decrease the charger volume, a single stage LLC battery charger is investigated in this paper. PFC stage is eliminated, therefore no bulky capacitor is necessary any more, and battery is charged with a sinusoidal-like charging current. However, previous studies show that such a pulsating charging current has only minimal impact on battery life and efficiency. Design considerations of the resonant tank and optimal transformer design are presented. A 360W single stage LLC converter prototype for e-bike charger achieves a power factor of 0.98, efficiency of 0.93 and power density of 1,8kW/dm³. Y1 - 2019 UR - https://ieeexplore.ieee.org/document/8767563 SN - 978-3-8007-4938-6 SB - 978-3-8007-4938-6 SP - 672 EP - 678 S1 - 7 PB - VDE Verlag GmbH CY - Berlin ; Offenbach ER -