Four-Phase Interleaved Bidirectional DC-DC Converter with Magnetic Integration and Voltage Control for High-Efficiency Energy Storage Systems

This paper presents a highly efficient, high-power bidirectional DC-DC power system. The system employs a four-phase interleaved parallel buck-boost topology, achieving lithium battery charge and discharge management through magnetically integrated inductors, an adaptive dead-time compensation driving strategy, and a voltage closed-loop control algorithm. Experimental results demonstrate that, under an input voltage of around 3.3V, the charge-discharge efficiency reaches a maximum of 91.1%., with an output voltage ripple below ±1% and a dynamic response time of less than 5 ms.