The invention discloses an electric vehicle composite power supply system energy management method, which comprises the steps that a composite power supply system model is established; an energy control strategy module detects change conditions of charge states and load currents of a super capacitor and a battery, uses expected values of charging and discharging power as threshold values, and usesa logic threshold value control strategy to distribute energy respectively needing to be borne by the super capacitor and the battery according to the driving state of a vehicle; a bidirectional DC/DC converter control module performs negative feedback adjustment by adopting a PI controller, and controls the magnitude and direction of the output current of a bidirectional DC/DC converter by taking the error between the target current of the load and the sampling current as the input of the PI controller; and the expected values of different charging and discharging powers are set, and the composite power supply system model is simulated in combination with the working conditions to obtain the optimal expected values of the charging and discharging powers. According to the invention, powerdistribution of the electric vehicle composite power supply system and simulation optimization of expected values of charging and discharging power are realized.

    本发明公开了一种电动汽车复合电源系统能量管理方法,包括建立复合电源系统模型;能量控制策略模块通过检测超级电容和电池的荷电状态、负载电流的变化情况,并以充、放电功率的期望值作为门限值,根据车辆的行驶状态利用逻辑门限值控制策略对超级电容和电池分别需要承担的能量进行分配;双向DC/DC变换器控制模块采用PI控制器进行负反馈调节,以负载的目标电流与采样电流的误差作为PI控制器的输入,控制双向DC/DC变换器输出电流大小和方向;设定不同的充、放电功率的期望值,并结合工况对复合电源系统模型进行仿真,得到最佳的充、放电功率的期望值。本发明实现了电动汽车复合电源系统的功率分配以及充、放电功率的期望值的仿真优化。


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    Title :

    Electric vehicle composite power supply system energy management method


    Additional title:

    一种电动汽车复合电源系统能量管理方法


    Contributors:

    Publication date :

    2021-02-26


    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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