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<p>In response to the demands of electric vehicle power batteries for wide voltage input and multimode adaptation, this paper proposes a two-stage on-board charging system (OBC) based on a hybrid full-bridge converter (HFBC). This charging system can stably output wide-range DC voltage, significantly reduce the voltage stress on power devices, and effectively enhance the voltage gain characteristics. In view of the nonlinear characteristics of the HFBC, this paper proposes a dual phase-shift (DPS) control strategy, which integrates the primary-side phase shift (PPS) and secondary-side phase shift (SPS) control modes and realizes wide-range output voltage regulation by time-sharing switching between the two control modes. A 1.2&#xa0;kW laboratory prototype was developed with 220&#xa0;V input and adjustable 200–500&#xa0;V output. Experimental results demonstrate that the system can stably output a wide voltage range while maintaining excellent dynamic response under rapid load variations. The maximum efficiency of the charging system reaches 95.4%, validating the accuracy of the theoretical analysis.</p>

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A novel two-stage on-board charging system based on hybrid full-bridge converter

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Kai Zhou,
  • Ziming Liu,
  • Huayu Yang

摘要

In response to the demands of electric vehicle power batteries for wide voltage input and multimode adaptation, this paper proposes a two-stage on-board charging system (OBC) based on a hybrid full-bridge converter (HFBC). This charging system can stably output wide-range DC voltage, significantly reduce the voltage stress on power devices, and effectively enhance the voltage gain characteristics. In view of the nonlinear characteristics of the HFBC, this paper proposes a dual phase-shift (DPS) control strategy, which integrates the primary-side phase shift (PPS) and secondary-side phase shift (SPS) control modes and realizes wide-range output voltage regulation by time-sharing switching between the two control modes. A 1.2 kW laboratory prototype was developed with 220 V input and adjustable 200–500 V output. Experimental results demonstrate that the system can stably output a wide voltage range while maintaining excellent dynamic response under rapid load variations. The maximum efficiency of the charging system reaches 95.4%, validating the accuracy of the theoretical analysis.