The control of isolated full-bridge bidirectional DC-DC converter for battery power management
isolated DC-DC converter
Keywords:
Isolated bidirectional DC-DC converter, full-bridge, battery charging/dischargingAbstract
The advancement of direct current (DC) technologies enables electrochemical energy storage for DC electrical power with batteries to be deployed for locations devoid of grids and mobile devices. Battery-based energy storage systems are essential for applications such as electric vehicles and mobile devices. DC-DC converters with two-directions power flow are required for Battery-based energy storage systems for both charging and discharging. Bidirectional DC-DC converters are used for power flowing in two directions. Isolation between battery and system can be realized by bidirectional DC-DC converter. In this study, an isolated full-bridge bidirectional DC-DC converter is proposed for charging- discharging of batteries. The transformer used for isolation is operated with high frequency for compactness. The proposed DC-DC converter is controlled with PI for both high and low sides. The control parameters of PI are tuned via Ziegler -Nichols method. The proposed DC-DC converter design with 0.6-3 kW power range with approximately 90% efficiency. MATLAB/Simulink is used for designing and simulations.
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