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Cable installment type charging control device and method of operating the same

  • US 9,751,412 B2
  • Filed: 03/17/2015
  • Issued: 09/05/2017
  • Est. Priority Date: 03/19/2014
  • Status: Active Grant
First Claim
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1. A cable installment type charging control device for charging an electric vehicle (EV) by using power of a grid-side, the cable installment type charging control device comprising:

  • a first relay delivering power of the grid-side to an EV-side;

    a second relay delivering power of the grid-side to the EV-side;

    an AC-DC converter generating a driving voltage by using AC power between the grid-side of the first relay and the grid-side of the second relay;

    a first sub fusion detecting unit comprising;

    a third relay having one end connected to the EV-side of the first relay;

    a first resistor having one end connected to the third relay;

    a first pull-up resistor having one end supplied by the driving voltage; and

    a first photo coupler including a light emitting diode connected between another end of the first resistor and one end of the second relay and a transistor connected between another end of the first pull-up resistor and a ground,wherein the transistor is turned on when the light emitting diode is emitting light, and wherein the first sub fusion detecting unit outputs a logic high signal or a logic low signal corresponding to the driving voltage according to whether a current flows through the light emitting diode; and

    wherein the cable installment type charging control device further comprises a control unit configured to;

    turn off the third relay in a state where the first and second relays are turned off; and

    determine that the first relay is not fused on when the logic low signal is input and that the first relay is fused on when the logic high signal is input.

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