Charging communication module and charging method of electric vehicle
A charging communication module and a charging method of an electric vehicle are provided. The charging communication module includes a voltage sensor that senses a voltage level of a signal line to generate a sensing result, a controller that generates first control information based on the sensing result and converts information of a first communication format provided from the signal line into information of a second communication format, and a switch device that electrically connects or disconnects the signal line with or from the controller based on the first control information.
1. A charging communication module of an electric vehicle, comprising:
a voltage sensor configured to sense a voltage level of a signal line to generate a sensing result;
a controller configured to generate first control information based on the sensing result and to convert information of a first communication format provided from the signal line into information of a second communication format; and
a switch device configured to electrically connect or disconnect the signal line with or from the controller based on the first control information.
2. The charging communication module of claim 1 , wherein the controller is configured to:
generate the first control information for electrically disconnecting the signal line from the controller when the sensing result indicates that the voltage level of the signal line is higher than or equal to an overvoltage determination reference voltage level; and
generate the first control information for electrically connecting the signal line with the controller when the sensing result indicates that the voltage level of the signal line is higher than or equal to a connection reference voltage level and lower than the overvoltage determination reference voltage level.
3. The charging communication module of claim 1 , further comprising:
a filter device interposed between the switch device and the controller,
wherein the filter device transfers a voltage within a given voltage level range from the switch device to the controller.
4. The charging communication module of claim 3 , wherein the controller is configured to:
generate, based on the sensing result, second control information to control operation of the filter device.
5. The charging communication module of claim 4 , wherein the controller is configured to:
generate the second control information to allow the filter device to operate when the first control information for electrically connecting the signal line and the switch device is generated.
6. A charging communication module of an electric vehicle, comprising:
a voltage sensor configured to generate a sensing result by sensing a voltage level of each of a plurality of signal lines electrically connected with a plurality of communication lines included in a charging cable;
a switch device configured to electrically connect or disconnect the plurality of signal lines with or from a filter device based on first control information;
the filter device configured to remove a noise included in information of the plurality of signal lines transferred from the switch device based on second control information;
a controller configured to generate the first control information and the second control information based on the sensing result, and to convert and output information of a first communication format, from which the noise is removed by the filter device, into information of a second communication format.
7. The charging communication module of claim 6 , wherein the plurality of communication lines include a first communication line, a second communication line, and a third communication line,
wherein the first and third communication lines are lines transferring the information of the first communication format, and
wherein the second communication line is a line transferring information about an electrical connection state of the charging cable and the electric vehicle.
8. The charging communication module of claim 7 , wherein the plurality of signal lines include a first signal line, a second signal line, and a third signal line, and
wherein the second signal line electrically connected with the second communication line is interposed between the first and third signal lines electrically connected with the first and third communication lines.
9. The charging communication module of claim 8 , wherein the controller is configured to:
compare a voltage level of each of the first to third signal lines and a connection reference voltage level of a corresponding signal line to generate the first control information for electrically connecting each of the plurality of signal lines with the filter device; and
compare a voltage level of each of the first to third communication lines and an overvoltage determination reference voltage level of a corresponding signal line to generate the first control information for electrically disconnecting the plurality of signal lines with the filter device.
10. The charging communication module of claim 9 , wherein the controller is configured to:
generate the first control information for electrically connecting a signal line, a voltage level of which is higher than or equal to the connection reference voltage level of the corresponding signal line and lower than the overvoltage determination reference voltage level of the corresponding signal line, with the filter device; and
generate the first control information for electrically disconnecting the first to third signal lines from the filter device when a voltage level of at least one of the first to third signal lines is higher than or equal to the overvoltage determination reference voltage level of the corresponding signal line.
11. The charging communication module of claim 7 , wherein the switch device includes a first switch, a second switch, and a third switch,
wherein the first switch electrically connects or disconnects the first signal line with or from the filter device based on the first control information,
wherein the second switch electrically connects or disconnects the second signal line with or from the filter device based on the first control information, and
wherein the third switch electrically connects or disconnects the third signal line with or from the filter device based on the first control information.
12. The charging communication module of claim 11 , wherein the filter device includes a first TVS (Transient Voltage Suppressor) diode, a second TVS diode, and a third TVS diode,
wherein the first TVS diode is electrically connected between the first switch and the controller,
wherein the second TVS diode is electrically connected between the second switch and the controller, and
wherein the third TVS diode is electrically connected between the third switch and the controller.
13. The charging communication module of claim 12 , wherein each of the first to third TVS diodes transfers a voltage provided from each of the first to third switches to the controller, and the voltage transferred to the controller is a voltage of a given voltage level or lower.
14. A charging method of an electric vehicle, the method comprising:
comparing a voltage level of a first communication line and a first connection reference voltage level to electrically connect the electric vehicle with the first communication line;
comparing a voltage level of a second communication line and a second connection reference voltage level to electrically connect the electric vehicle with the second communication line;
comparing the voltage level of the first communication line and a first overvoltage determination reference voltage level to electrically disconnect the first and second communication lines from the electric vehicle; and
comparing the voltage level of the second communication line and a second overvoltage determination reference voltage level to electrically disconnect the first and second communication lines from the electric vehicle.
15. The method of claim 14 , wherein the comparing of the voltage level of the first communication line and the first connection reference voltage level to electrically connect the electric vehicle with the first communication line includes:
electrically connecting the first communication line with the electric vehicle when the voltage level of the first communication line is higher than or equal to the first connection reference voltage level,
wherein the comparing of the voltage level of the second communication line and the second connection reference voltage level to electrically connect the electric vehicle with the second communication line includes:
electrically connecting the second communication line with the electric vehicle when the voltage level of the second communication line is higher than or equal to the second connection reference voltage level.
16. The method of claim 14 , wherein the comparing of the voltage level of the first communication line and the first overvoltage determination reference voltage level to electrically disconnect the first and second communication lines from the electric vehicle includes:
electrically disconnecting the first and second communication lines from the electric vehicle when the voltage level of the first communication line is higher than or equal to the first overvoltage determination reference voltage level, and
wherein the comparing of the voltage level of the second communication line and the second overvoltage determination reference voltage level to electrically disconnect the first and second communication lines from the electric vehicle includes:
electrically disconnecting the first and second communication lines from the electric vehicle when the voltage level of the second communication line is higher than or equal to the second overvoltage determination reference voltage level.