The invention discloses a power switching method and device, a battery management system and a nonvolatile storage medium. The method comprises the steps that a first discharge power characteristic diagram and a second discharge power characteristic diagram of a vehicle power battery are obtained, and a first power upper limit value corresponding to the first discharge power characteristic diagram is larger than a second power upper limit value corresponding to the second discharge power characteristic diagram; acquiring first actual power of the power battery during discharging based on the first discharging power characteristic diagram; integrating a difference value between the first actual power and the second power upper limit value, and determining a first power integral value of the power battery during discharging based on the first discharging power characteristic diagram; and under the condition that the first power integral value is greater than the first power integral threshold value, switching the power battery to discharge based on the second discharge power characteristic diagram. The technical problem that the battery performance is limited due to the fact that the vehicle power battery cannot be charged and discharged completely according to the preset power characteristic diagram is solved.

    本发明公开了一种功率切换方法、装置、电池管理系统及非易失性存储介质。其中,该方法包括:获取车辆动力电池的第一放电功率特性图和第二放电功率特性图,其中,第一放电功率特性图对应的第一功率上限值大于第二放电功率特性图对应的第二功率上限值;获取动力电池基于第一放电功率特性图进行放电时的第一实际功率;对第一实际功率和第二功率上限值的差值进行积分,确定动力电池在基于第一放电功率特性图进行放电时的第一功率积分值;在第一功率积分值大于第一功率积分阈值的情况下,将动力电池切换为基于第二放电功率特性图进行放电。本发明解决了车辆动力电池由于无法完全按照预设的功率特性图进行充放电导致电池性能受限的技术问题。


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    Title :

    Power switching method and device, battery management system and nonvolatile storage medium


    Additional title:

    功率切换方法、装置、电池管理系统及非易失性存储介质


    Contributors:
    ZHAO CHUNHUANG (author) / JI XUEBIN (author)

    Publication date :

    2023-10-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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