The invention provides a vehicle lithium battery charging and discharging control method and system, and the method comprises the steps: determining the charging/discharging working condition of a traction lithium battery according to a power supply mode of a vehicle, evaluating the charging/discharging demands according to the vehicle state and the traction lithium battery state, and carrying out the unloading operation before a traction lithium battery contactor acts, the on-load operation of the contactor is avoided; the current charging/discharging current limiting value of the traction lithium battery is calculated according to the power supply capacity of the vehicle under different working conditions, the power receiving capacity of the maximum voltage monomer of the traction lithium battery, the charging/discharging characteristic matrix table of the traction lithium battery and the bearing capacity of the charging/discharging circuit, and the lithium battery is prevented from being overcharged/overdischarged. The performance and the service life of the lithium battery pack are improved; the external power supply type and the traction lithium battery power supply type of the vehicle are respectively controlled, so that the charging requirement for the traction lithium battery during external power supply is met, the feedback energy of electric braking can be recycled to the lithium battery, and the energy-saving effect is achieved.

    本发明提供了一种车辆锂电池充放电控制方法及系统,本发明依据车辆的供电模式确定牵引锂电池的充/放电工况,并根据车辆状态和牵引锂电池状态评估充/放电需求,同时,在牵引锂电池接触器动作前进行卸载操作,以避免该接触器带负荷操作;根据车辆不同工况下的供电能力、牵引锂电池最高电压单体的受电能力、牵引锂电池充/放电特性矩阵表以及充/放电电路的承载能力进行评估,计算出牵引锂电池当前的充/放电限流值,防止锂电池过充/过放,提高了锂电池组的性能和使用寿命;对于车辆处于外部供电和牵引锂电池供电两种类型进行分别控制,既满足外部供电时对牵引锂电池的补电需求,又能将电制动的馈能回收到锂电池,达到节能的效果。


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    Title :

    Vehicle lithium battery charging and discharging control method and system


    Additional title:

    车辆锂电池充放电控制方法及系统


    Contributors:
    WANG JIANRONG (author) / SUN JUNYONG (author) / MEI XI (author) / AI WANDONG (author) / GAN YU (author) / SUN CHAOQUN (author)

    Publication date :

    2024-10-08


    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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