WO2018199385A1

WO2018199385A1 - Multiplex communication control device and method for charging electric vehicle

Info

Publication number: WO2018199385A1
Application number: PCT/KR2017/006564
Authority: WO
Inventors: 임유석; 한승호; 손찬; 김상옥
Original assignee: 한국전력공사
Priority date: 2017-04-28
Filing date: 2017-06-22
Publication date: 2018-11-01
Also published as: KR102001562B1; KR20180121018A

Abstract

A multiplex communication control device for charging an electric vehicle, according to one embodiment of the present invention, may comprise: a wireless signal receiving unit configured to receive a communication signal for charging an electric vehicle in a wireless manner; a wired signal receiving unit configured to receive a communication signal for charging the electric vehicle in a wired manner; a first communication unit for processing the communication signal received by the wireless signal receiving unit according to a first communication protocol; a second communication unit for processing the communication signal received by the wired signal receiving unit according to a second communication protocol; a third communication unit for processing the communication signal received by the wired signal receiving unit according to a power line communication protocol; and a control unit for activating the first communication unit upon receipt of the communication signal by the wireless signal receiving unit, activating the second communication unit when a duty ratio of the communication signal received by the wired signal receiving unit goes beyond a predetermined duty ratio range, and activating the third communication unit when a duty ratio of the communication signal received by the wired signal receiving unit is within the predetermined duty ratio range.

Description

Multi-communication control device and method for electric vehicle charging

The present invention relates to a multi-communication control apparatus and method for charging an electric vehicle.

Recently, due to the problem of depletion of fossil fuels and air pollution due to excessive use of fossil fuels, research and development of renewable energy and eco-friendly transportation methods are actively conducted worldwide. . Electric vehicles (EVs) are attracting attention as such environmentally friendly means of transportation. The proliferation of EV charging infrastructure is essential for the spread of EVs.

Electric vehicle charging requires communication between the charging device and the electric vehicle, but may require various communication methods depending on the type, design time, and charging method of the electric vehicle.

One embodiment of the present invention provides a multi-communication control apparatus and method for charging an electric vehicle that can cope with various communication methods of the electric vehicle.

According to an aspect of the present invention, there is provided a multi-communication control apparatus for charging an electric vehicle, including: a wireless signal receiver configured to wirelessly receive a communication signal for charging an electric vehicle; A wired signal receiver configured to receive a communication signal for charging an electric vehicle in a wired manner; A first communication unit processing the communication signal received by the wireless signal receiving unit according to a first communication protocol; A second communication unit processing the communication signal received by the wired signal receiving unit according to a second communication protocol; A third communication unit for processing the communication signal received by the wired signal receiving unit according to a power line communication protocol; And activating the first communication unit according to the communication signal reception of the wireless signal receiver and activating the second communication unit when the duty ratio of the communication signal received by the wired signal receiver is out of a predetermined duty ratio range. A controller activating the third communication unit when the duty ratio of the communication signal received by the receiver is within a predetermined duty ratio range; It may include.

For example, the controller may activate the second communication unit or the third communication unit by comparing the duty ratio of the communication signal corresponding to the CP (Control pilot) signal of the IEC 61851-1 communication protocol with the predetermined duty ratio range. Can be.

For example, the third communication unit may include: a first power line communication unit processing a communication signal received by the wired signal receiving unit according to a first power line communication protocol; And a second power line communication unit for processing the communication signal received by the wired signal receiving unit according to a second power line communication protocol. The control unit may activate the first power line communication unit when the frequency of the communication signal received by the wired signal receiver is greater than or equal to a first frequency.

For example, the third communication unit may further include a third power line communication unit which processes the communication signal received by the wired signal receiving unit according to a third power line communication protocol, and wherein the control unit receives the communication received by the wired signal receiving unit. Activate the second power line communication unit when the frequency of the signal is less than the first frequency and above the second frequency, and activate the third power line communication unit when the frequency of the communication signal received by the wired signal receiver is less than the second frequency. can do.

For example, the control unit may include the first power line communication unit when the frequency of the communication signal received by the wired signal receiver is greater than or equal to a first frequency and the size of the communication signal received by the wired signal receiver is greater than or equal to the first magnitude. The second power line communication unit or the third power line communication unit when the frequency of the communication signal received by the wired signal receiver is less than a first frequency and the magnitude of the communication signal received by the wired signal receiver is equal to or greater than a second size. Can be activated.

For example, after the first, second and third power line communication units are activated, the matching process for the power lines is performed, and the control unit performs the first, second and third power lines when the matching process fails. The power line communication unit which is not activated among the communication units may be further activated.

For example, when the matching process fails, the first, second, and third power line communication units perform an additional matching process a predetermined number of times, and the controller controls the first, second, and third power line communication units. After all of the activation, if the additional matching process of the first, second and third power line communication unit all fails, it is possible to generate the connector recombination request information or the customer center inquiry request information.

For example, the multi-communication control apparatus for charging the electric vehicle may include a quick charge signal receiver configured to receive a communication signal for rapid charging of the electric vehicle; And a fourth communication unit processing the communication signal received by the quick charge signal receiving unit according to a fourth communication protocol. The controller may further include deactivating the first, second, and third communication units when the quick charge signal receiver receives a communication signal.

According to an embodiment of the present invention, a multi-communication control method for charging an electric vehicle includes: detecting a communication signal for charging the electric vehicle; Checking whether the communication signal corresponds to a first communication protocol; Processing the communication signal according to the first communication protocol when the communication signal corresponds to the first communication protocol; Comparing the duty ratio of the communication signal with a predetermined duty ratio range when the communication signal does not correspond to the first communication protocol; Processing the communication signal according to a second communication protocol when the duty ratio of the communication signal is out of the predetermined duty ratio range; And processing the communication signal according to a power line communication protocol when the duty ratio of the communication signal is within the predetermined duty ratio. It may include.

For example, the processing according to the power line communication protocol may include: processing according to a first power line communication protocol when the communication signal satisfies a first condition; Processing according to a second power line communication protocol when the communication signal satisfies a second condition; And generating connector recombination request information or customer center inquiry request information when the communication signal does not satisfy both the first condition and the second condition. Wherein the first condition is a condition that a duty ratio of the communication signal is within the predetermined duty ratio, a frequency of the communication signal is greater than or equal to a first frequency, and a magnitude of the communication signal is greater than or equal to a first magnitude, and the second condition May be a condition that a duty ratio of the communication signal is within the predetermined duty ratio, a frequency of the communication signal is less than a first frequency, and a size of the communication signal is greater than or equal to a second size.

The multi-communication control apparatus and method for charging an electric vehicle according to an embodiment of the present disclosure may support charging of a plurality of electric vehicles using different communication methods and electric vehicles using various communication methods, and thus charging a plurality of electric vehicles. It can be widely deployed in the infrastructure and can increase the charging convenience of the electric vehicle driver.

1 is a view schematically showing a multi-communication processing apparatus for charging an electric vehicle according to an embodiment of the present invention.

2 is a diagram illustrating a communication protocol selection of a multi-communication processing apparatus for charging an electric vehicle according to an embodiment of the present invention.

3 is a diagram illustrating a power line communication protocol selection of a multi-communication processing apparatus for charging an electric vehicle according to an embodiment of the present invention.

4 is a view showing an additional configuration of a multi-communication processing apparatus for charging an electric vehicle according to an embodiment of the present invention.

5 is a flowchart illustrating a multi-communication processing method for charging an electric vehicle according to an embodiment of the present invention.

6 is a flowchart specifically illustrating a power line communication protocol processing step of a multi-communication processing method for charging an electric vehicle according to an embodiment of the present invention.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

Referring to FIG. 1, the multi-communication processing apparatus 100 for charging an electric vehicle according to an embodiment of the present disclosure may include first, second, third, and fourth

electric vehicles

11, 12, 13, and 14 and an electric vehicle. Communication for charging can be performed.

That is, each of the first, second, third, and fourth

electric vehicles

11, 12, 13, and 14 may communicate the first, second, third, and fourth communication with the multi-communication processing apparatus 100 for charging the electric vehicle. Can be done.

Here, at least one of the first, second, third, and fourth communication may be based on a communication protocol different from the remaining communication protocols.

For example, the first communication may follow the communication protocol of IEC 15118 or DIN 70121, depending on the wireless scheme.

For example, the second communication may follow the communication protocol of IEC61851-1 or SAE J1772 depending on the AC charging method.

For example, the third communication may follow a power line communication protocol.

For example, the fourth communication may follow a communication protocol of a controller area network (CAN) according to a fast DC charging method.

Referring to FIG. 2, a multi-communication processing apparatus for charging an electric vehicle according to an embodiment of the present invention may include a wireless signal receiver 110, a wired signal receiver 120, a first communication unit 130, and a second communication unit 140. ), A third communication unit 150, and a controller 160.

The wireless signal receiver 110 may be configured to receive a communication signal for charging an electric vehicle in a wireless manner. For example, the wireless signal receiver 110 may include an antenna, a coil, or a coupler for receiving a communication signal, and the wireless method may include at least one of Wi-Fi, RFID, NFC, MST, Zigbee, and Bluetooth. Can be.

The wired signal receiver 120 may be configured to receive a communication signal for charging an electric vehicle in a wired manner. For example, the wired signal receiver 120 may include a connector electrically connected to a power line for power line communication. For example, the connector may have a form corresponding to the DC combo type 1 scheme.

The first communication unit 130 may process the communication signal received by the wireless signal receiving unit 110 according to the first communication protocol. For example, the first communication protocol may be IEC 15118 or DIN 70121.

The second communication unit 140 may process the communication signal received by the wired signal receiving unit 120 according to the second communication protocol. For example, the second communication protocol may be SAE J1772 or IEC 61851-1.

The third communication unit 150 may process the communication signal received by the wired signal receiving unit 120 according to the power line communication protocol. For example, the power line communication protocol may be ISO / IEC 12139-1, IEEE 1901, or ITU-T G9960 / 1.

The control unit 160 activates the first communication unit 130 according to the reception of the communication signal of the wireless signal receiving unit 110, and the duty ratio of the communication signal received by the wired signal receiving unit 120 has a predetermined duty ratio. When the range is out of range, the second communication unit 140 may be activated and the third communication unit 150 may be activated when the duty ratio of the communication signal received by the wired signal receiver 120 is within a predetermined duty ratio range. That is, the controller 160 may selectively activate one of the first, second, and

third communication units

130, 140, and 150.

Accordingly, the multi-communication control apparatus 100 for charging an electric vehicle according to an embodiment of the present disclosure may support charging of a plurality of electric vehicles using different communication methods and electric vehicles using various communication methods. It can be widely deployed in a plurality of electric vehicle charging infrastructure, and can increase the charging convenience of the electric vehicle driver.

The deactivated communication unit may not receive a communication signal from the wireless signal receiver 110 or the wired signal receiver 120 or may substantially stop supply and demand for power. For example, the controller 160 may control or control an electrical connection state between the first, second, and

third communication units

130, 140, and 150 and the wireless signal receiver 110 or the wired signal receiver 120. By controlling power supplied to the first, second, and

third communication units

130, 140, and 150, activation of the first, second, and

third communication units

130, 140, and 150 may be controlled. In addition, since the matching process may proceed after the first, second, and

third communication units

130, 140, and 150 are activated, the controller 160 controls the first, second, and third communication units 130,. By controlling the matching processes of the 140 and 150, activation of the first, second and

third communication units

130, 140 and 150 may be controlled.

Meanwhile, the controller 160 compares the duty ratio of the communication signal corresponding to the CP (Control pilot) communication signal of the communication protocol of IEC 61851-1 with a predetermined duty ratio range to compare the second communication unit 140 or the third communication unit. 150 may be activated. The CP communication signal may have a form of a pulse signal whose duty ratio is controlled by a pulse width modulation (PWM), and may be basic signaled by the wired signal receiver 120. Meanwhile, the predetermined duty ratio may be 5%, but is not limited thereto.

Referring to FIG. 3, a multi-communication processing apparatus for charging an electric vehicle according to an embodiment of the present invention includes a wireless signal receiver 110a, a wired signal receiver 120a, a power line communication signal coupling unit 121, and a power line communication signal. Filter unit 122, power line communication signal analysis unit 123, first communication unit 130a, first power line communication unit 151, second power line communication unit 152, third power line communication unit 153, control unit 160a The encryption decryption processing unit 191, the security processing unit 192, and the external interface unit 193 may be included.

The power line communication signal coupling unit 121 may couple the power line communication signal.

The power line communication signal filter 122 may prevent the power line communication signal from radiating to the outside and may improve noise characteristics of the power line signal.

The power line communication signal analyzer 123 may analyze the power line communication signal to generate frequency information and size information. Here, the frequency information and the size information may affect whether the first, second, and third power

line communication units

151, 152, and 153 are activated.

The first power line communication unit 151 may process the communication signal received by the wired signal receiver 120a according to the first power line communication protocol. For example, the first power line communication protocol may be ISO 12139-1 or IEC 12139-1.

The second power line communication unit 152 may process the communication signal received by the wired signal receiving unit 120a according to the second power line communication protocol. For example, the second power line communication protocol may be IEEE 1901.

The third power line communication unit 153 may process the communication signal received by the wired signal receiving unit 120a according to the third power line communication protocol. For example, the third power line communication protocol may be ITU-T G9960 / 1.

According to the design, the second power line communication unit 152 and the third power line communication unit 153 may be integrated with each other according to an inter-system protocol (ISP) mode for mutual coexistence of the second power line communication protocol and the third power line communication protocol. Can be.

The controller 160a may compare the frequency information with the first frequency, and activate the first power line communication unit 151 when the frequency of the communication signal received by the wired signal receiver 120a is equal to or greater than the first frequency. When the frequency of the communication signal is less than the first frequency, the second power line communication unit 152 or the third power line communication unit 153 may be activated. The first frequency may be 24 MHz, but is not limited thereto.

In addition, the controller 160a may compare the frequency information with the second frequency, and activate the second power line communication unit 152 when the frequency of the communication signal received by the wired signal receiver 120a is greater than or equal to the second frequency. The third power line communication unit 153 may be activated when the frequency of the communication signal is less than the second frequency. The second frequency may be 500 KHz, but is not limited thereto.

The encryption decryption processing unit 191 may control the encryption process or the decryption process for the communication signal.

The security processing unit 192 may store certificate information for implementing a connection recognition automatic authentication method.

The external connection interface unit 193 may perform communication for data connection with the electric vehicle charging device.

Referring to FIG. 4, the controller 160a includes the second communication unit 140a, the MCU 161, the quick charge signal receiving unit 170, the fourth communication unit 180, the payment processing unit 194, and the internal connection interface unit 195. ) May be included.

The second communication unit 140a may be included in the control unit 160a and may support the signal processing according to the second communication protocol to the MCU 161.

The MCU 161 may perform the overall control operation of the multi-communication processing apparatus for charging the electric vehicle according to an embodiment of the present invention.

The quick charge signal receiver 170 may receive a communication signal for quick charge of the electric vehicle.

The fourth communication unit 180 may process the communication signal received by the quick charge signal receiving unit 170 according to the fourth communication protocol. For example, the fourth communication protocol may be a controller area network (CAN) communication protocol. When rapid charging of the electric vehicle proceeds, the first, second, and third communication units may be deactivated.

The payment processor 194 may receive electric vehicle charging capacity information as a result of data linkage through an external connection interface unit, generate payment information according to the electric vehicle charging capacity information, and transmit the payment information to the communication unit.

The internal connection interface unit 195 may support internal connection between components of the multi-communication processing apparatus for charging an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 5, in the multi-communication processing method for charging an electric vehicle according to an embodiment of the present disclosure, detecting a communication signal for charging an electric vehicle (S101 and S111), and the communication signal corresponds to a first communication protocol. Determining whether the signal is a signal (S102), when the communication signal corresponds to the first communication protocol, processing the communication signal according to a first communication protocol (S103, S104), and the communication signal is the first communication protocol. Comparing the duty ratio of the communication signal with a predetermined duty ratio range when the communication protocol does not correspond to the communication protocol (S121); when the duty ratio of the communication signal is out of the predetermined duty ratio range, Processing according to a communication protocol (S122); processing the communication signal according to a power line communication protocol when the duty ratio of the communication signal is within the predetermined duty ratio (S131, S132). S133 and S104 may be included. The multi-communication processing method for charging the electric vehicle may be performed by the multi-communication processing apparatus for charging the electric vehicle described above with reference to FIGS. 1 to 4.

In the multi-communication processing apparatus and method for charging the electric vehicle, after the processing according to the first, second or third communication protocol of the communication signal proceeds the matching process (S103, S133) and the charge / discharge process proceeds (S104, S122).

In addition, the multi-communication processing apparatus and method for charging the electric vehicle, check whether the matching process for power line communication has failed (S134), and accumulate a retry count (S141) when the matching process has failed (S141). Then, by checking whether the retry count is greater than 3 (S142), three additional matching processes for each power line communication unit may be performed.

In addition, the multi-communication processing apparatus and method for charging the electric vehicle, when the retry count exceeds 3, deactivate the power line communication unit (S143), accumulate the power line communication unit sequence (S144), and power line By verifying that the communication sequence number is greater than 4, further activation and further matching processes for unactivated powerline communication units can proceed.

In addition, the multi-communication processing apparatus and method for charging the electric vehicle may generate the connector recombination request information or the customer center inquiry request information when the power line communication unit number exceeds 4.

In addition, the multi-communication processing apparatus and method for charging the electric vehicle may determine whether to start CAN communication for rapid charging in the case of the multi-type charging device (S151) (S152).

Referring to FIG. 6, the multi-communication processing apparatus and method for charging an electric vehicle according to an embodiment of the present disclosure may determine whether the duty ratio of the communication signal CP is 5% after the cable connection S201 (S202). When the duty ratio of the communication signal is out of 5%, the second communication protocol based charging may be performed (S203).

In addition, the multi-communication processing apparatus and method for charging the electric vehicle, when the duty ratio of the communication signal is 5%, checks the reception of the power line communication signal (S211), and checks whether the frequency of the communication signal is 500KHz or more (S212). When the frequency of the communication signal is lower than 500KHz, check the existence of the G3 PLC chip (S213), and depending on whether or not the power supply of the HP-GP chip (S214) or ISP coexistence (S215), the electric vehicle The charging and discharging procedure may be performed (S216).

In addition, the multi-communication processing apparatus and method for charging the electric vehicle, when the frequency of the communication signal is 500KHz or more, check whether the frequency of the communication signal is 24MHz or more (S221), and when the frequency of the communication signal is 24MHz or more of the communication signal Check whether the size is greater than -85 dBm (S222), process the communication signal according to the OFDM or ROBO method (S223) according to the result of the size confirmation of the communication signal, apply the power of the HP-GP chip (S214), the matching process And (S225), the electric vehicle charging and discharging procedure can be carried out (S216).

In addition, the multi-communication processing apparatus and method for charging the electric vehicle, when the frequency of the communication signal is more than 500KHz or less than 24MHz (S231) check whether the size of the communication signal is greater than -20dBm, DMT according to the result of the size confirmation of the communication signal The communication signal may be processed according to the method S232, and the power of the HP-GP chip may be applied (S233).

Meanwhile, the term '~ part' used in the present embodiment refers to software or a hardware component such as a field-programmable gate array (FPGA) or an ASIC, and '~ part' performs certain roles. However, '~' is not meant to be limited to software or hardware. '~ Portion' may be configured to be in an addressable storage medium or may be configured to play one or more processors. Thus, as an example, '~' means components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, and the like. Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided within the components and the 'parts' may be combined into a smaller number of components and the 'parts' or further separated into additional components and the 'parts'. In addition, the components and 'units' may be implemented to reproduce one or more CPUs in a device or system.

As used herein, terms such as "component", "module", "system", "interface", etc. generally refer to a computer-related entity that is hardware, a combination of hardware and software, software, or running software. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. For example, both an application running on a controller and the controller can be a component. One or more components may reside within a thread of process and / or execution, and the components may be localized on one computer and distributed between two or more computers.

The present invention has been described above by way of example, but the present invention is not limited to the above-described embodiment, and those skilled in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Anyone can make a variety of variations.

Claims

A wireless signal receiver configured to wirelessly receive a communication signal for charging an electric vehicle;

A wired signal receiver configured to receive a communication signal for charging an electric vehicle in a wired manner;

A first communication unit processing the communication signal received by the wireless signal receiving unit according to a first communication protocol;

A second communication unit processing the communication signal received by the wired signal receiving unit according to a second communication protocol;

A third communication unit for processing the communication signal received by the wired signal receiving unit according to a power line communication protocol; And

Activate the first communication unit according to the communication signal reception of the wireless signal receiver, and activate the second communication unit when the duty ratio of the communication signal received by the wired signal receiver is out of a predetermined duty ratio range, and activate the wired signal receiver. A controller activating the third communication unit when the duty ratio of the communication signal received by the controller is within a predetermined duty ratio range; Multi-communication control device for electric vehicle charging comprising a.
The method of claim 1,

The control unit compares the duty ratio of the communication signal corresponding to the CP (Control pilot) signal of the IEC 61851-1 communication protocol with the predetermined duty ratio range for the electric vehicle charging to activate the second communication unit or the third communication unit Multi-communication control device.
The method of claim 1, wherein the third communication unit,

A first power line communication unit for processing the communication signal received by the wired signal receiving unit according to a first power line communication protocol; And

A second power line communication unit for processing the communication signal received by the wired signal receiving unit according to a second power line communication protocol; Including,

And the control unit activates the first power line communication unit when the frequency of the communication signal received by the wired signal receiver is greater than or equal to a first frequency.
The method of claim 3,

The third communication unit further includes a third power line communication unit for processing the communication signal received by the wired signal receiving unit in accordance with a third power line communication protocol,

The control unit activates the second power line communication unit when the frequency of the communication signal received by the wired signal receiver is less than the first frequency and is greater than or equal to the second frequency, and the frequency of the communication signal received by the wired signal receiver is set to the first frequency. The multi-communication control device for charging the electric vehicle to activate the third power line communication unit when less than 2 frequencies.
The method of claim 4, wherein

The controller activates the first power line communication unit when the frequency of the communication signal received by the wired signal receiver is greater than or equal to a first frequency and the size of the communication signal received by the wired signal receiver is greater than or equal to the first magnitude. An electric vehicle that activates the second power line communication unit or the third power line communication unit when the frequency of the communication signal received by the wired signal receiver is less than the first frequency and the magnitude of the communication signal received by the wired signal receiver is greater than or equal to the second size. Multi-communication control device for charging.
The method of claim 4, wherein

After the first, second and third power line communication unit is activated, the matching process for the power line is performed,

And the control unit additionally activates an unactivated power line communication unit among the first, second and third power line communication units when the matching process fails.
The method of claim 6,

The first, second and third power line communication unit proceeds an additional matching process a predetermined number of times when the matching process fails,

The controller reconnects request information or a customer center inquiry request when all of the additional matching processes of the first, second and third power line communication units fail after activating all of the first, second and third power line communication units. Multi-communication control device for electric vehicle charging to generate information.
The method of claim 1,

A quick charge signal receiver configured to receive a communication signal for rapid charging of the electric vehicle; And

A fourth communication unit for processing the communication signal received by the quick charge signal receiving unit according to a fourth communication protocol; More,

And the controller is configured to deactivate the first, second, and third communication units when the quick charge signal receiver receives a communication signal.
Detecting a communication signal for charging the electric vehicle;

Checking whether the communication signal corresponds to a first communication protocol;

Processing the communication signal according to the first communication protocol when the communication signal corresponds to the first communication protocol;

Comparing the duty ratio of the communication signal with a predetermined duty ratio range when the communication signal does not correspond to the first communication protocol;

Processing the communication signal according to a second communication protocol when the duty ratio of the communication signal is out of the predetermined duty ratio range; And

Processing the communication signal according to a power line communication protocol when the duty ratio of the communication signal is within the predetermined duty ratio; Multi-communication control method for electric vehicle charging comprising a.
The method of claim 9, wherein the processing according to the power line communication protocol comprises:

Processing according to a first power line communication protocol when the communication signal satisfies a first condition;

Processing according to a second power line communication protocol when the communication signal satisfies a second condition; And

Generating connector recombination request information or customer center inquiry request information when the communication signal does not satisfy both the first condition and the second condition; Including,

The first condition is a condition that a duty ratio of the communication signal is within the predetermined duty ratio, a frequency of the communication signal is greater than or equal to a first frequency, and a size of the communication signal is greater than or equal to a first magnitude,

And wherein the second condition is a condition that a duty ratio of the communication signal is within the predetermined duty ratio, a frequency of the communication signal is less than a first frequency, and the size of the communication signal is at least a second size.