关键词: 电动汽车；功率分配；电路拓扑；母线

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