Abstract:
A charging station for electric vehicles is disclosed. The charging station includes a charge device and a terminal. The terminal is used for monitoring and recording the charging status of the charge device. The charging station can rapidly charge electric vehicles just like gas stations for engine powered vehicles.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Technical Field 
         [0002]    The invention generally relates to charging stations, particularly to charging stations for electrical vehicles. 
         [0003]    2. Related Art 
         [0004]    In this period of high price of petroleum, it is certain that petroleum fuel is replaced by electricity, especially for vehicles. At present, the primary problem of electrical vehicles is endurance. Batteries of electrical vehicles need to be charged repeatedly. Thus charging stations are necessary for electrical vehicles just like gas stations for petroleum vehicles. Furthermore, home electric power can charge electrical vehicles, but it will need a long time and complicated process to charge. This is an important reason why the electrical vehicles cannot be very popular. 
       SUMMARY OF THE INVENTION 
       [0005]    A primary object of the invention is to provide a charging station similar to currently available gas stations. The charging station can rapidly charge batteries of electrical vehicles for solving the endurance problem with less time and simpler process than using home electric power to charge. 
         [0006]    To accomplish the above object, the charging station of the invention includes a charge device and a terminal for monitoring and recording the charging status of the charge device. The charge device further includes a plurality of charge units and at least one communication interface. Each of the charge units is composed of: 
         [0007]    a filter circuit for filtering noise interference from an alternating current (AC) power source and rectifying AC power into direct current (DC) power; 
         [0008]    a power element forming signal on/off cycle for stabilizing output voltage or current; 
         [0009]    an isolation and voltage-step-down module for matching the batteries to be charged and for preventing from interference when a charge process is performed by plural charge units in parallel or series; 
         [0010]    a feedback amplifier for feedback control; and 
         [0011]    a controller receiving signals from the feedback amplifier and communication interface for controlling on/off status of the power element. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0012]      FIG. 1  shows the arrangement of the charging station of the invention; and 
           [0013]      FIG. 2  is a block diagram of the charge device shown in  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0014]    Referring to  FIG. 1 , the charging station for electrical vehicles of the invention includes at least one charge device  2  arranged at one side of a driveway  1  and a terminal  3  adjacent to the charge device  2 . The terminal  3  is used for monitoring and recording the charging status of the charge device. An electrical vehicle which comes into the driveway  1  and stops, its battery can be rapidly charged by the charge device  2  for solving the endurance problem. 
         [0015]    Referring to  FIG. 2 , the charge device  2  further includes a plurality of charge units  20  and at least one communication interface  21 . The communication interface  21  is used for connecting to a battery  4  to be charged. The communication interface  21  can communicate with a protection circuit (not shown) of the battery  4  and obtain some parameters of the battery  4  such as storing capacity. 
         [0016]    Each of the charge units  20  is composed of a filter circuit  201 , a power element  202 , an isolation and voltage-step-down module  203 , a feedback amplifier  204  and a controller  205 . 
         [0017]    An input end of the filter circuit  201  connects to an external alternating current (AC) power source  5  for filtering noise interference from the AC power source  5  and rectifying AC power into direct current (DC) power for supplying power to the other elements and the battery  4  to be charged. 
         [0018]    The power element  202  forms signal on/off cycle for stabilizing output voltage or current. One end of the power element  20  is connected to the filter circuit  201 , and the other two ends are connected to the isolation and voltage-step-down module  203  and the controller  205  separately. The controller  205  controls the power element  202  to switch on/off according to the signal on/off cycle, thus the isolation and voltage-step-down module  203  is powered by the power element  202  discontinuously. 
         [0019]    One end of the isolation and voltage-step-down module  203  is connected to the power element  202  for receiving power from the filter circuit  201 . The other end of the isolation and voltage-step-down module  203  is connected to the battery  4  for charging. Meanwhile, the isolation and voltage-step-down module  203  performs isolation and voltage step-down conversion for matching the battery  4  to be charged and for preventing from interference when a charge process is performed by plural charge units  20  in parallel or series; 
         [0020]    Two ends of the feedback amplifier  204  are connected to the output end of the isolation and voltage-step-down module  203  and the controller  205 , respectively for feedback control. The feedback control can make the controller  205  outputs signals stably. 
         [0021]    Three ends of the controller  205  are connected to the feedback amplifier  204 , communication interface  21  and the power element  202  respectively, for receiving signals from the feedback amplifier  204  and communication interface  21  for controlling on/off status of the power element  202 . 
         [0022]    By means of the abovementioned structure, the charging station of the invention can not only charge the batteries of electrical vehicles but also communicate with the batteries charged for preventing the batteries from being damaged. 
         [0023]    It will be appreciated by persons skilled in the art that the above embodiment has been described by way of example only and not in any limitative sense, and that various alterations and modifications are possible without departure from the scope of the invention as defined by the appended claims.