The invention provides an electric vehicle quick charging system based on a two-stage solid-state transformer. The electric vehicle quick charging system is used for solving the problem that voltage among sub-modules of a rectifier-stage converter of an existing charging system based on the two-stage solid-state transformer SST is unbalanced. Comprising a two-stage solid-state transformer SST and a flexible power switching unit, the two-stage solid-state transformer SST comprises a rectifier-stage module and an isolation-stage module which are connected in sequence, the input end of the rectifier-stage module is connected with a power grid, the output end of the isolation-stage module is connected with the input end of the flexible power switching unit, and the output end of the flexible power switching unit is connected with the rectifier-stage module. The flexible power switching unit comprises a plurality of output ports, and the plurality of output ports are respectively connected with a plurality of charging terminals. According to the invention, the flexible power switching unit is arranged to solve the problem that the voltage of the rectifier-stage converter sub-module in the novel electric vehicle rapid charging system based on the two-stage SST is unbalanced, so that the efficient, flexible and low-cost power conversion of the electric vehicle rapid charging system based on the SST is realized.

    本申请提供一种基于两级式固态变压器的电动汽车快速充电系统,用于解决现有基于两级式固态变压器SST的充电系统整流级变换器子模块间电压不平衡的问题。包括两级式固态变压器SST和柔性功率切换单元,所述两级式固态变压器SST包括依次连接的整流级模块和隔离级模块,所述整流级模块的输入端与电网连接,所述隔离级模块的输出端与所述柔性功率切换单元的输入端连接,所述柔性功率切换单元包括若干输出端口,若干所述输出端口分别与若干充电终端连接。本申请通过设置柔性功率切换单元解决了基于两级式SST的新型电动汽车快速充电系统中整流级变换器子模块电压不平衡的问题,从而实现基于SST的电动汽车快速充电系统高效、灵活、低成本的功率变换。


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    Title :

    Electric vehicle quick charging system based on two-stage solid-state transformer


    Additional title:

    一种基于两级式固态变压器的电动汽车快速充电系统


    Contributors:
    LU SIZHAO (author) / LI SIQI (author) / LIU ZHE (author)

    Publication date :

    2024-07-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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