The invention discloses a method and device for controlling double DCDC current sharing based on double DCDC efficiency, and belongs to the technical field of vehicle power supplies, and the method comprises the steps: determining the maximum value of the target voltage of a storage battery and the minimum value of the target voltage of the storage battery according to the SOC of the storage battery and the temperature of the storage battery, and then determining the output target voltage range of the double DCDC based on the double DCDC efficiency; obtaining the initial output voltage of the double DCDC according to the output target voltage range of the double DCDC; according to the difference between the output currents of the double DCDC and the initial output voltage of the double DCDC, the output voltage of the double DCDC is dynamically adjusted, so that the difference between the output currents of the double DCDC is smaller than a preset current threshold value. According to the invention, control is carried out according to the output voltage and the output current of the double DCDC and the SOC of the storage battery, so that the double DCDC works in a high-efficiency area and the difference of the output current is dynamically kept within a certain threshold, and the problem that the output current of the double DCDC is not uniform is solved.

    本发明公开了一种基于双DCDC效率控制双DCDC均流的方法及装置,属于车辆电源技术领域,方法包括:根据蓄电池SOC及蓄电池温度确定蓄电池目标电压最大值和蓄电池目标电压最小值,然后基于双DCDC效率,确定双DCDC的输出目标电压范围;由双DCDC的输出目标电压范围得到双DCDC的初始输出电压;根据双DCDC输出电流之差,以及双DCDC的初始输出电压,动态调节双DCDC输出电压,以达到双DCDC输出电流之差小于预设电流阈值。本发明根据双DCDC输出电压、输出电流以及蓄电池SOC进行控制,使双DCDC均工作在高效率区并且输出电流之差动态保持在一定的阈值内,解决双DCDC输出不均流的问题。


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    Title :

    Method and device for controlling double DCDC current sharing based on double DCDC efficiency


    Additional title:

    一种基于双DCDC效率控制双DCDC均流的方法及装置


    Contributors:
    WANG BING (author) / WEI YONG (author) / TANG YU (author) / WANG JUNPENG (author) / LI DANLIN (author)

    Publication date :

    2023-07-07


    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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