The invention discloses an electric forklift energy recovery device and method and an electric forklift. The recovery device comprises a generator, a PWM rectifier, an energy storage battery, a power battery, an inverter and a battery energy management system. The generator is driven by a hydraulic motor to rotate to generate alternating current electric energy; the PWM rectifier is used for processing the generated alternating current into direct current and storing the direct current in the energy storage battery; according to the energy storage battery, on one hand, the stored electric energy is supplied to the electric forklift; on the other hand, the power battery is charged; the inverter is used for converting the direct current energy stored in the energy storage battery or released by the power battery into alternating current; and the battery energy management system is used for carrying out charging and discharging management on the energy storage battery according to the output voltage of the generator and the load voltage. According to the energy-saving forklift truck, braking torque can be provided for goods descending, energy recovery and reutilization are achieved, the purpose of saving energy is achieved, and the operation time of the forklift truck is prolonged.

    本发明公开了一种电动叉车能量回收装置及方法、电动叉车,回收装置包括:发电机,PWM整流器,储能电池,动力电池,逆变器及电池能量管理系统;所述发电机,通过液压马达带动旋转产生交流电能;所述PWM整流器,用于将产生的交流电处理为直流电,并存储于储能电池当中;所述存储于储能电池,一方面将储存电能供电动叉车使用;另一方面为与动力电池充电;所述逆变器,用于将存储于储能电池或动力电池释放的直流能转换为交流电;所述电池能量管理系统,用于根据发电机的输出电压及负载电压的大小,对储能电池进行充放电管理。本发明不仅可以为货物下降提供制动力矩,实现了能量的回收和再利用,并且实现了节能的目的,延长了叉车的作业时间。


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    Title :

    Electric forklift energy recovery device and method and electric forklift


    Additional title:

    一种电动叉车能量回收装置及方法、电动叉车


    Contributors:
    MAO MINGXING (author) / LI KAI (author) / DU YUANXING (author) / YUE YUANCHAO (author) / YU LU (author) / JIANG TONG (author)

    Publication date :

    2023-06-13


    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 / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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