The invention relates to a cold start control method and device, a medium, a vehicle control unit and a system. The method comprises the steps of obtaining an engine starting instruction; controlling a battery relay to be closed in response to the starting instruction; if the temperature of the power battery is smaller than the preset temperature threshold value, the starting power of the generator and the available discharging power of the power battery are obtained; and if the starting power is greater than the available discharge power and the difference between the starting power and the output power of the power battery is less than or equal to the output power of the bidirectional DC/DC converter, controlling the bidirectional DC/DC converter to reversely boost, and controlling the generator to start the engine by using the electric energy provided by the low-voltage storage battery and the power battery. Therefore, normal starting of the engine can be guaranteed, the problem that the engine cannot be started due to performance reduction or insufficient power of the starter in a low-temperature environment is solved, and vehicle using experience is improved. The engine is started by the generator, so that the starting smoothness of the engine can be obviously improved.

    本公开涉及一种冷启动控制方法、装置、介质、整车控制器及系统。方法包括:获取发动机启动指令;响应于启动指令,控制电池继电器闭合;若动力电池的温度小于预设温度阈值,则获取发电机的启动功率和动力电池的可用放电功率;若启动功率大于可用放电功率、且启动功率与动力电池的输出功率的差值小于或等于双向DC/DC转换器的输出功率,则控制双向DC/DC转换器反向升压,控制发电机利用低压蓄电池和动力电池提供的电能启动发动机。这样,可保证发动机正常启动,避免低温环境下起动机性能下降或者动力不足导致的发动机无法启动的问题,提升用车体验。利用发电机启动发动机,可明显改善发动机的启动平顺性。


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    Title :

    Cold start control method, device, medium, vehicle control unit and system


    Additional title:

    冷启动控制方法、装置、介质、整车控制器及系统


    Contributors:

    Publication date :

    2022-04-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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