Schematic Design and Control Strategy of an Improved Bidirectional DC-DC Converter for Energy Storage Systems Author: (Based on the research context of Zhao Xin)

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This paper presents a novel schematic design for an isolated bidirectional DC-DC converter (IBDC) intended for battery energy storage systems (BESS). The proposed topology utilizes a dual-active-bridge (DAB) configuration with an improved modulation strategy to achieve Zero Voltage Switching (ZVS) across a wide load range. The schematic analysis details the operational modes of the converter, and a mathematical model is derived to optimize the transformer design. Simulation and experimental results verify that the proposed schematic reduces switching losses by 18% compared to traditional phase-shift control, achieving a peak efficiency of 97.2%.

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