The invention discloses a water pump control method and system of an electric vehicle and the vehicle, and belongs to the field of electric vehicle heat management. The method comprises the steps that the actual temperature of a plurality of to-be-cooled parts and the current duty ratio of a water pump are obtained; determining a target duty ratio of the water pump based on each actual temperature; according to the target duty ratio of the water pump and the current duty ratio of the water pump, determining the duty ratio lifting demand of the water pump; if the demand is the rising demand, executing a first control strategy, obtaining an updated water pump duty ratio, and calculating an output quantity; if so, executing a second control strategy to obtain an updated water pump duty ratio and calculate an output quantity; and controlling the water pump according to the output quantity. According to the method, stable change of the duty ratio of the water pump can be maintained, the problem that parts such as pipelines are damaged due to sudden increase of water pressure caused by great increase or decrease of water flow is solved, the service life of a cooling system is prolonged, a water pressure sensor does not need to be additionally arranged, and the vehicle cost is reduced.

    本申请公开了一种电动汽车的水泵控制方法、系统及车辆,属于电动汽车热管理领域。该方法包括:获取多个待冷却部件的实际温度和水泵当前占空比;基于每一实际温度确定水泵目标占空比;根据水泵目标占空比与水泵当前占空比确定水泵占空比升降需求;若为上升需求,执行第一控制策略,得到更新后的水泵占空比并计算输出量;若为下降需求,执行第二控制策略,得到更新后的水泵占空比并计算输出量;根据输出量对水泵进行控制。该方法能够维持水泵占空比的稳定变化,解决因水流量的大幅度增大或减小等造成的水压突然增大损坏管路等部件的问题,延长冷却系统的使用寿命,且不需要加装水压传感器,降低了车辆成本。


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    Title :

    Water pump control method and system of electric vehicle and vehicle


    Additional title:

    电动汽车的水泵控制方法、系统及车辆


    Contributors:
    LI HAIMU (author) / ZHANG XIAOYU (author) / WEI GUANGJIE (author)

    Publication date :

    2025-02-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F04D Strömungsarbeitsmaschinen , NON-POSITIVE-DISPLACEMENT PUMPS / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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