Abstract: To address the issues of insufficient flexibility, excessive number of components, complex control, and high cost in existing power distribution topologies for dual-port direct current chargers of electric vehicles, this paper proposes a power distribution topology scheme based on a multisegment busbar mutual aid mode. In this scheme, the direct current output busbars of the power conversion modules are divided into four segments via multiple pairs of direct current contactors, ensuring that each power module can be freely switched to any output interface. This achieves mutual aid and capacity expansion among the power modules. The proposed structure can meet the charging power demands of up to 10 scenarios, with the number of contactors required being only 37.5% of that used in a full-matrix topology. Additionally, the complexity of the program algorithm and hardware costs are significantly reduced, while the output response time is shortened to 2.8 s, demonstrating the technical advantages of the propose topology.

Key words: electric vehicle; power allocation; circuit topology; busbar

摘要： 针对电动汽车双接口直流充电机现有功率分配拓扑存在的灵活性不足、器件数量多、 控制复杂及成本高等问题，文章提出一种基于多段母线功率互济模式的功率分配拓扑方案。 该方案将功率变换模块的直流输出母线，通过多对直流接触器分解为四段，保证每台功率模 块均能自由投切到任一输出接口，实现了功率模块之间互济与扩容。此结构最多可满足 10 种 场景的充电功率需求，且接触器数量只有全矩阵拓扑结构使用量的 37.5%。同时，程序算法的 复杂度和硬件成本均显著下降，并将输出响应时间缩短至 2.8 s，体现了文章所提拓扑结构的 技术优势。

关键词: 电动汽车；功率分配；电路拓扑；母线