The embodiment of the invention discloses a direct current-direct current voltage conversion device, a fuel cell power system and a new energy vehicle, relates to the technical field of electromechanics, and can effectively reduce ripple current. The direct current-direct current voltage conversion device comprises a voltage conversion part and a control part, wherein the voltage conversion part is used for converting a first voltage into a second voltage through alternate charging and discharging of at least two voltage conversion modules, wherein at any moment of voltage conversion, at leastone first conversion module in a charging state and at least one second conversion module in a discharging state exist in the voltage conversion modules, the first voltage and the second voltage aredirect-current voltages, and the second voltage is higher than the first voltage; and the control part is electrically connected with the voltage conversion part and is used for controlling the voltage conversion modules to be charged or discharged according to a preset time sequence so as to enable ripples of the second voltage to be less than a preset ripple threshold value. The device disclosedby the invention can be used in DC voltage conversion.

    本发明实施例公开一种直流‑直流电压转换装置、燃料电池动力系统及新能源车辆,涉及机电技术领域,能够有效降低纹波电流。所述直流‑直流电压转换装置包括:电压转换部,用于通过至少两个电压转换模块的轮流充放电,将第一电压转换为第二电压,其中,在电压转换的任意时刻,所述电压转换模块中存在至少一个处于充电状态的第一转换模块和至少一个处于放电状态的第二转换模块,所述第一电压和所述第二电压为直流电压,且所述第二电压高于所述第一电压;控制部,与所述电压转换部电连接,用于按照预设时序控制各所述电压转换模块充电或放电,以使所述第二电压的纹波小于预设纹波阈值。本发明可用于直流电压转换中。


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    Title :

    Direct current-direct current voltage conversion device and fuel cell power system


    Additional title:

    一种直流-直流电压转换装置及燃料电池动力系统


    Contributors:
    LI JIANGKUN (author) / AN DONGYU (author)

    Publication date :

    2020-07-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen





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