Electric vehicle charging controller and electric vehicle charging device including the same

Abstract

The present invention provides an electric vehicle charging controller capable of determining whether or not a ground wire is connected between an electric vehicle power supply device and an electric vehicle, and an electric vehicle charging device including the same. [Solution] The electric vehicle charging device includes an inlet 52 which includes a grounding pin P3 which is coupled to a coupler and connects a first grounding wire PE which is connected to a first grounding power source on the electric vehicle power supply device 10 side and a second grounding wire PE which is connected to a second grounding power source on the electric vehicle 20 side, a first signal pin P6 which is coupled to a coupler and connects a first signal line CC1 on the electric vehicle power supply device side and a first signal line on the electric vehicle side, and a second signal pin P7 which is coupled to a coupler and connects a second signal line CC2 on the electric vehicle power supply device side and a second signal line on the electric vehicle side, and a sensing unit 210 which is connected to the electric vehicle power supply device through a third signal line A+ and a fourth signal line A- and receives a third signal and a fourth signal.

Claims

1. A grounding pin that connects the first grounding wire, which is coupled to the first grounding power supply on the electric vehicle power supply unit side and connected to the second grounding wire, which is connected to the second grounding power supply on the electric vehicle side, A first signal pin that is coupled to a coupler and connects the first signal line on the electric vehicle power supply device side and the first signal line on the electric vehicle side, and An inlet including a second signal pin that is coupled to the coupler and connects the second signal line on the electric vehicle power supply side to the second signal line on the electric vehicle side, and The electric vehicle charging controller includes a sensing unit that is connected to the electric vehicle power supply device via a third signal line and a fourth signal line to receive the third signal and the fourth signal, The aforementioned inlet is, It includes a signal unit positioned between the second signal line and the third signal line, which generates a second signal and transmits it to the electric vehicle charging controller, The sensing unit is A first processing unit is electrically connected to the electric vehicle power supply device through the third signal line and the fourth signal line, and receives the third signal and the fourth signal from the electric vehicle power supply device. The second processing unit receives the third and fourth signals received by the first processing unit and transmits them to the control unit, and An electric vehicle charging device including an insulating section that electrically isolates the first processing unit and the second processing unit.

2. The insulating portion is The electric vehicle charging device according to claim 1, wherein the third signal and the fourth signal received from the first processing unit are converted from electrical signals to optical signals, and then the third signal and the fourth signal are converted from optical signals to electrical signals and transmitted to the second processing unit.

3. The insulating portion is The electric vehicle charging device according to claim 2, which is electrically connected to the second ground power supply.

4. The insulating portion is The electric vehicle charging device according to claim 2, comprising an optocoupler.

5. The first processing unit is, A first diode controls the magnitude of the voltage of the third signal received through the third signal line to be less than or equal to a preset value. A second diode that blocks the reverse voltage applied to the electric vehicle power supply device through the third signal line, and The electric vehicle charging device according to claim 2, further comprising a third diode for blocking a reverse voltage applied to the electric vehicle charging controller through the fourth signal line.

6. The signal unit is, The electric vehicle charging device according to claim 1, comprising a first resistive element whose first stage is connected to the third signal line and whose second stage is connected to the second signal line.

7. The aforementioned coupler is It includes a second resistive element, the first stage of which is connected to the second signal line and the second stage of which is connected to the ground line, The electric vehicle charging device according to claim 6, wherein when the first ground wire and the second ground wire are connected, a current is generated passing through the first resistive element and the second resistive element.

8. The aforementioned coupler is It includes a third resistive element, the first stage of which is connected to the ground wire and the second stage of which is connected to the first signal line, The aforementioned inlet is, It includes a fourth resistor element, the first stage of which is connected to the first signal line and the second stage of which is connected to the ground line, The control unit, The electric vehicle charging device according to claim 7, wherein when the first ground wire and the second ground wire are disconnected, a current is generated that passes through the first to fourth resistive elements.

9. The control unit, The electric vehicle charging device according to claim 1, wherein if the magnitude of the voltage of the second signal is greater than the first voltage value and less than or the same as the second voltage value, it is determined that the first ground wire and the second ground wire are connected.

10. The control unit, The electric vehicle charging device according to claim 9, wherein if the magnitude of the voltage of the second signal is greater than the second voltage value and less than the third voltage value, it is determined that the ground wire on the electric vehicle power supply device side and the ground wire on the electric vehicle side are not connected.

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