Here, in this paper, resonant tank model system and practical method considerations are exited for a high production LLC multi resonant dc-dc conversion in a two-ways efficient battery charger for district electric vehicle implementation. The multi resonant controlling has been analysed and its production characteristics are occurred. It removes both low-and high frequency current ripple quantity on the battery system this maximizing battery life time without punishes the magnitude of the

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... r. Simulation and fact-finding results are proposed for a prototype module unit conversion of 390V come from the input dc link to an output system voltage range of 48-72V dc at 650 W. The basically prototype improves a system of peak efficiency is maximum of 96%.