JP5599301B2 - In-vehicle power line communication system - Google Patents

Description

  The present invention relates to a power line communication system that uses a cable (power line) connected to an in-vehicle battery as a communication line, and particularly relates to measures against leakage electromagnetic waves from the power line.

  In recent years, electric vehicles using electricity as a power source have been put into practical use from the viewpoint of reducing carbon dioxide emissions and improving the efficiency of energy utilization. Along with this, charging infrastructure for electric vehicles has begun to be installed in various places. In order to fully charge the battery of an electric vehicle, a large amount of electric power of more than a dozen KWh (2 to 3 days in terms of average power consumption of a general household) is required. Therefore, enhancement of load adjustment function and power distribution control function is an issue.

  Therefore, power supply infrastructure such as a power plant is connected to an electric vehicle via communication, and optimal battery charging processing is performed according to the amount of power that can be supplied by the power supply facility, and charging / settlement according to the amount of charged power is performed. A technique called V2G (Vehicle to Grid) or V2H (Vehicle to Home) has been proposed. For example, in Patent Document 1 below, user information indicating a person to be charged for battery charging is notified to the power supply infrastructure by power line communication (hereinafter referred to as “PLC communication”) using a charging cable for an in-vehicle battery. And the electric power supply system which charges according to the charged electric energy is proposed.

  In recent years, a next-generation power network called a “smart grid” that incorporates an automatic power supply / demand control means has attracted attention. In the power grid managed by the smart grid, not only charging the vehicle battery (power supply from the grid to the vehicle) but also actively discharging the vehicle battery (power supply from the vehicle to the grid) is considered. ing.

JP 2006-262570 A

  With the increasing functionality of automobiles, in recent years, various electronic devices are generally mounted on vehicles. One example is a vehicle door lock system called smart entry. In this system, door locking / unlocking (locking / unlocking) is generally performed by a user (driver) having a portable key having a wireless communication function pressing a locking / unlocking button of a vehicle. Is. When the user presses the lock / unlock button of the vehicle, the in-vehicle wireless communication device authenticates the portable key by wireless communication, and the door is locked / unlocked if it is correctly authenticated.

  On the other hand, in PLC communication using a battery charging cable, leakage electromagnetic waves from the charging cable may interfere with the operation of other electronic devices. Therefore, when PLC communication is continuously performed during charging of the battery, there is a concern that some malfunction may occur in the operation of other electronic devices during charging. For example, in a smart entry vehicle door lock system, wireless communication between an in-vehicle wireless communication device and a portable key is performed in a low frequency band (several hundreds of hertz) that is vulnerable to noise, so it is likely to be subject to interference from leaked electromagnetic waves. It is done. For this reason, if the PLC communication is continuously performed while the battery is being charged, there may be a problem that the door cannot be opened while the battery is being charged.

  The present invention has been made to solve the above-described problems, and in an in-vehicle power line communication system that performs power line communication during charging / discharging of a battery, it suppresses interference with other in-vehicle devices due to leakage electromagnetic waves from the power line. The purpose is to do.

Onboard power line communication system according to the present onset Ming, a power line communication apparatus for communicating with a power line connected to the vehicle battery, and detects that the vehicle electronic device performs a specific two-way communications, the particular two-way An interference suppression device that performs a first control for controlling at least one of an output of the power line communication device and a current value flowing through the power line so that a leakage electromagnetic wave from the power line is reduced during communication. is there.

  According to the in-vehicle power line communication system according to the first aspect of the present invention, the operation of the in-vehicle electronic device is not disturbed by the electromagnetic wave leaking from the power line, so that the in-vehicle electronic device malfunctions during charging / discharging of the battery. Is prevented.

  Moreover, according to the vehicle-mounted power line communication system which concerns on the 2nd aspect of this invention, the leakage electromagnetic waves of a power line can be suppressed, without interrupting communication of important information, such as charging / settlement information. By not interrupting communication, it can be applied to an existing charging / settlement system, and a charging / settlement system for charging power of an electric vehicle can be realized at a relatively low cost.

1 is a configuration diagram of a battery charging system according to Embodiment 1. FIG. 3 is a block diagram illustrating configurations of a PLC communication apparatus and an interference suppression apparatus according to Embodiment 1. FIG. 3 is a flowchart showing an operation of the interference suppression device according to the first embodiment. 1 is a configuration diagram of a vehicle door lock system according to Embodiment 1. FIG. It is a figure which shows the process sequence of the vehicle door lock system which concerns on Embodiment 1. FIG. 3 is a configuration diagram of a battery charging system according to Embodiment 2. FIG. 6 is a block diagram showing a configuration of an HMI information processing apparatus according to Embodiment 2. FIG. It is a block diagram which shows the structure of the PLC communication apparatus and interference suppression apparatus which concern on Embodiment 3. FIG.

<Embodiment 1>
FIG. 1 is a diagram showing a configuration of a battery charging system according to the present embodiment. In the battery charging system, the vehicle 1 is an electric vehicle, and includes a battery 10, a charging control device 11, a PLC communication device 12, and an interference suppression device 13. When charging the battery 10, the vehicle 1 is connected to the power supply device 4 via the charging cable 3.

  The PLC communication device 12 performs PLC communication with the external power supply device 4 through the charging cable 3. Information sent from the vehicle 1 to the power supply device 4 by PLC communication includes information related to the state of the battery 10 such as the remaining amount of power, and information sent from the power supply device 4 to the vehicle 1 includes control information for charging processing. (Charging start / stop commands, current value specification during charging, etc.).

  The charging control device 11 controls a charging operation for storing the power supplied from the power supply device 4 through the charging cable 3 in the battery 10. The charging control device 11 controls the charging operation of the battery 10 according to the charging control information obtained from the power supply device 4 by PLC communication.

  The in-vehicle electronic device 14 is, for example, a vehicle door lock system. The interference suppression device 13 controls the operation of the PLC communication device 12 so that leakage electromagnetic waves from the charging cable 3 generated by PLC communication do not interfere with the operation of the in-vehicle electronic device 14. That is, the interference suppression device 13 monitors the operation state of the in-vehicle electronic device 14 and temporarily stops the PLC communication in the PLC communication device 12 when detecting that the operation in the in-vehicle electronic device 14 is susceptible to the interference of the PLC communication. Thus, priority is given to the operation of the in-vehicle electronic device 14. Thereby, the leakage electromagnetic wave of PLC communication is prevented from interfering with the operation of the in-vehicle electronic device 14.

  FIG. 2 is a block diagram showing more detailed configurations of the charging control device 11, the PLC communication device 12, the interference suppression device 13, and the in-vehicle electronic device 14. As shown in the figure, the charge control device 11 includes a charge control unit 11a and a current value control unit 11b. The charging control unit 11a controls the charging voltage and charging current supplied to the battery 10. The current value control unit 11 b controls the current value flowing through the charging cable 3.

  The PLC communication device 12 includes a PLC communication unit 12a, a charging device control unit 12b, and a PLC communication state setting unit 12c. The PLC communication unit 12 a performs PLC communication using the charging cable 3. The charging device control unit 12 b controls the charging control device 11 by sending the charging control information of the battery 10 obtained from the power supply device 4 to the current value control unit 11 b of the charging control device 11. The PLC communication state setting unit 12c sets the communication state (frequency / power used for communication, connection / disconnection of communication) of the PLC communication performed by the PLC communication unit 12a.

  The interference suppression device 13 includes a PLC communication stop unit 13a, an interference state determination unit 13b, and an electronic device state acquisition unit 13c. The electronic device state acquisition unit 13 c monitors the operation of the in-vehicle electronic device 14 by acquiring information on the operation state of the in-vehicle electronic device 14. The interference state determination unit 13b determines whether or not the in-vehicle electronic device 14 performs an operation of receiving the interference of PLC communication based on the operation state information of the in-vehicle electronic device 14 acquired by the electronic device state acquisition unit 13c. The PLC communication stop unit 13a causes the PLC communication device 12 to stop / restart PLC communication based on the determination result of the interference state determination unit 13b.

  The in-vehicle electronic device 14 includes a state output unit 14 a that transmits information on the operation state of the in-vehicle electronic device 14 to the electronic device state acquisition unit 13 c of the interference suppression device 13.

  FIG. 3 is a flowchart showing the operation of the interference suppression device 13. In the interference suppression device 13, when the electronic device state acquisition unit 13c acquires the operation state of the in-vehicle electronic device 14 (ST1), the interference state determination unit 13b performs an operation performed by the in-vehicle electronic device 14 based on the information by PLC communication. It is determined whether or not the interference is received (ST2). When it is determined that interference is received (Yes in step ST3), the PLC communication stop unit 13a causes the PLC communication device 12 to stop PLC communication (ST4). If it is determined that no interference is received (No in ST3), the PLC communication stop unit 13a causes the PLC communication device 12 to execute (restart or continue) PLC communication (ST5).

  Hereinafter, the operation of the battery charging system according to the present embodiment will be described using a specific example of the in-vehicle electronic device 14. Here, it is assumed that the in-vehicle electronic device 14 is a smart entry vehicle door lock system.

  FIG. 4 is a configuration diagram of a vehicle door lock system 140 as the in-vehicle electronic device 14. In FIG. 4, illustration of the battery 10, the charging control device 11, and the PLC communication device 12 of the vehicle 1 is omitted.

  The vehicle door lock system 140 includes a door lock communication device 15, a lock / unlock button 16 and a lock / unlock device 18 mounted on the vehicle 1, and a portable key 17 possessed by a user (driver). The In this vehicle door lock system 140, when a user with the portable key 17 presses the lock / unlock button 16 of the vehicle 1, the door lock communication device 15 authenticates the portable key 17 by wireless communication and is correctly authenticated. Then, the locking / unlocking device 18 unlocks / locks the door.

  The door lock communication device 15 includes a door lock control unit 15a, a door lock communication unit 15b, and a lock / unlock button state acquisition unit 15c. 2 is also provided in the door lock communication device 15. The state output unit 14a shown in FIG. The door lock control unit 15 a controls the door lock of the vehicle 1 by transmitting a command (locking / unlocking command) for locking / unlocking the door to the locking / unlocking device 18. The door lock communication unit 15b performs authentication by two-way wireless communication with the portable key 17 and determines whether locking / unlocking may be performed. The lock / unlock button state acquisition unit 15c acquires the state of the lock / unlock button 16 being ON (button is pressed) / OFF (button is not pressed). The state output unit 14 a operates to notify the interference suppression device 13 of the operation state of the vehicle door lock system 140.

  Operation | movement of the PLC communication apparatus 12 and the interference suppression apparatus 13 in the vehicle 1 provided with the vehicle door lock system 140 is demonstrated. FIG. 7 shows the processing sequence. In the present embodiment, the wireless communication between the door lock communication device 15 and the portable key 17 is defined in advance as receiving the interference of PLC communication performed by the PLC communication device 12, and the information is interference. It is assumed that it is registered in the suppression device 13. What operation of the vehicle door lock system 140 (on-vehicle electronic device 14) is subjected to PLC communication interference may be verified by, for example, experiments at the design stage of the vehicle 1.

  Here, it is assumed that the vehicle 1 is connected to the power supply device 4 via the charging cable 3 and the battery 10 is being charged. At this time, the PLC communication device 12 performs PLC communication with the power supply device 4 using the charging cable 3.

  When the user presses the lock / unlock button 16 in this state, a notification that the lock / unlock button 16 has been pressed (ON notification) is sent from the lock / unlock button 16 to the door lock communication device 15. / Unlocked button state acquisition unit 15c. In the door lock communication device 15, when the lock / unlock button state acquisition unit 15 c receives the ON notification, the state output unit 14 a performs the door lock / unlock processing to the electronic device state acquisition unit 13 c of the interference suppression device 13. Send a notification to start (lock / unlock processing start notification).

  In the interference suppression device 13, when the electronic device state acquisition unit 13 c receives the lock / unlock process start notification, the interference state determination unit 13 b determines whether the operation of the vehicle door lock system 140 receives the interference of the PLC communication. (Interference determination) is performed. As described above, the lock / unlock process of the vehicle door lock system 140 involves wireless communication between the door lock communication device 15 and the portable key 17. The wireless communication is defined in advance as receiving the interference of PLC communication performed by the PLC communication device 12. Therefore, the interference state determination unit 13b determines that the operation of the vehicle door lock system 140 is subjected to PLC communication interference. Therefore, the PLC communication stop unit 13a sends a command (communication stop command) to stop the PCL communication to the PLC communication device 12, and the PLC communication is temporarily stopped.

  Thereafter, the door lock communication unit 15b of the door lock communication device 15 transmits a confirmation (key confirmation request) to the portable key 17 as to whether the door is allowed to be locked / unlocked by wireless communication. The portable key 17 that has received the key confirmation request returns a message indicating that the door is allowed to be locked / unlocked (key confirmation response) to the door lock communication unit 15b. When the door lock communication device 15 receives the key confirmation response, the door lock control unit 15a transmits a command to lock / unlock the door (lock / unlock command) to the lock / unlock device 18.

  When receiving the locking / unlocking command, the locking / unlocking device 18 switches between locking and unlocking the door. That is, when the door is locked, the door is unlocked, and when the door is unlocked, the door is locked. Next, the locking / unlocking device 18 sends a notification (locking / unlocking notification) indicating that the door has been locked / unlocked to the door lock communication device 15. Upon receiving the lock / unlock notification, the door lock communication device 15 notifies the electronic device state acquisition unit 13c of the interference suppression device 13 that the lock / unlock processing has been completed (lock / unlock processing completion notification). Send.

  When receiving the notification of completion of the locking / unlocking process, the interference suppression device 13 determines again whether or not the operation of the vehicle door lock system 140 is subjected to PLC communication interference. Since the lock / unlock process completion notification is output by the state output unit 14a after the wireless communication between the door lock communication device 15 and the portable key 17 is completed, the interference state determination unit 13b includes the vehicle door lock system 140. Is determined not to be subject to PLC communication interference. Therefore, the PLC communication stop unit 13a sends a command (communication execution command) for causing the PLC communication device 12 to execute PCL communication, and the PLC communication is resumed.

  As described above, in the present embodiment, when an operation for receiving PLC communication interference (wireless communication between the door lock communication device 15 and the portable key 17) is performed in the in-vehicle electronic device 14 (vehicle door lock system 140). The interference suppression device 13 temporarily stops the PLC communication by the PLC communication device 12. This prevents the in-vehicle electronic device 14 from receiving PLC communication interference. Therefore, it is possible to prevent the in-vehicle electronic device 14 from malfunctioning while the battery 10 is being charged.

  In the example illustrated in FIG. 5, the interference suppression device 13 monitors the state of the in-vehicle electronic device 14 and determines whether or not the in-vehicle electronic device 14 performs an operation of receiving PLC communication interference. Although shown, the determination may be performed by the in-vehicle electronic device 14 itself. That is, when the in-vehicle electronic device 14 determines whether or not the operation to be performed is a predetermined operation that receives the interference of the PLC communication, and performs the operation that receives the interference of the PLC communication, the in-vehicle electronic device 14 sends a notification to that effect to the interference suppression device. It is good also as a structure sent to 13 (PLC communication stop part 13a).

<Embodiment 2>
As described above, in the battery charging system according to the first embodiment, the PLC communication is stopped during the operation in which the in-vehicle electronic device 14 receives the interference of the PLC communication, so that the PLC communication is performed in the operation of the in-vehicle electronic device 14. Preventing interference.

  On the other hand, the contents of the PLC communication between the vehicle 1 and the power supply device 4 include information on the state of the battery 10 (remaining amount of power, etc.), charge control information (charge start / stop command, current during charging, etc. In addition to information related to the automatic operation of charging the battery 10, such as value specification, information used by the user (hereinafter referred to as “HMI (Human Machine Interface) information”) may be included. The HMI information includes important information that is undesirable when communication is interrupted, such as billing / settlement information. Therefore, the present embodiment proposes a battery charging system that prevents the operation of the in-vehicle electronic device 14 from receiving PLC communication interference without interrupting PLC communication of important information such as billing / settlement information.

  FIG. 6 is a configuration diagram of the battery charging system according to the second embodiment. The configuration of the system is obtained by mounting the HMI information processing apparatus 20 on the vehicle 1 in addition to the configuration of FIG. The HMI device 2 in FIG. 6 is a device for a user to input and output HMI information to the HMI information processing device 20, and examples of existing devices include an IC card reader and a mobile phone. As will be described later, the HMI information processing device 20 also functions as another interference suppression device that prevents the operation of the in-vehicle electronic device 14 from receiving interference of leakage electromagnetic waves of PLC communication.

  FIG. 7 is a block diagram showing a configuration of the HMI information processing apparatus 20. As shown in the figure, the HMI information processing apparatus 20 includes an HMI information input / output unit 20a, an HMI information conversion unit 20b, an HMI information extraction unit 20c, and a leakage electromagnetic wave suppression unit 20d.

  The HMI information input / output unit 20 a exchanges HMI information with the HMI device 2. The HMI information extraction unit 20c extracts HMI information such as a URL (Uniform Resource Locator) from the contents of PLC communication performed by the PLC communication device 12.

  The HMI information conversion unit 20b converts the acquired HMI information into a predetermined format (format). That is, the HMI information extracted from the PLC communication by the HMI information extraction unit 20c is converted into a format recognizable by the HMI device 2 by the HMI information conversion unit 20b and sent to the HMI information input / output unit 20a. The HMI information received by the HMI information input / output unit 20a from the HMI device 2 is converted into a format recognizable by the PLC communication device 12 by the HMI information conversion unit 20b and sent to the PLC communication device 12. With this process, the HMI information can be exchanged between the HMI device 2 and the power supply device 4.

  The leakage electromagnetic wave suppression unit 20d suppresses leakage electromagnetic waves from the charging cable 3 without interrupting PLC communication while the PLC communication device 12 transmits and receives HMI information. As a method of suppressing the leakage electromagnetic wave of the charging cable 3 without interrupting the PLC communication, for example, a method of reducing the frequency used in the PLC communication by controlling the PLC communication state setting unit 12c of the PLC communication device 12, or the PLC communication device 12 The charging device control unit 12b is controlled to reduce the amount of current flowing through the charging cable 3, or a method of performing both of them. Any method may be used as long as PLC communication can be continued. The operation of the leakage electromagnetic wave suppression unit 20d is prioritized over the operation of the PLC communication stop unit 13a of the interference suppression device 13.

  Hereinafter, the operation of the battery charging system according to the present embodiment will be described. However, since the elements shown in FIG. 6 other than the HMI apparatus 2 and the HMI information processing apparatus 20 are the same as those in the first embodiment, the operations of the HMI apparatus 2 and the HMI information processing apparatus 20 will be mainly described here.

  In the HMI information processing device 20, while the PLC communication device 12 performs PLC communication with the power supply device 4, the HMI information extraction unit 20c monitors whether the content of the PLC communication includes HMI information. The detection / extraction of HMI information can be performed by searching for information of a predefined pattern such as specific tag information such as HTML (HyperText Markup Language) and XML (Extensible Markup Language).

  First, the operation of the HMI information processing apparatus 20 when HMI information is sent from the power supply apparatus 4 to the PLC communication apparatus 12 by PLC communication will be described. When the HMI information extraction unit 20c detects the HMI information sent from the power supply device 4, the HMI information extraction unit 20c extracts the HMI information and sends it to the HMI information conversion unit 20b, and also notifies that the HMI information has been detected (HMI Information detection notification) is sent to the leakage electromagnetic wave suppression unit 20d.

  Upon receiving the HMI information detection notification, the leakage electromagnetic wave suppression unit 20d lowers the frequency of the PLC communication performed by the PLC communication device 12 or reduces the current value of the charging cable 3 within a range in which the PLC communication is not interrupted for a predetermined period. Thus, the leakage electromagnetic wave of the charging cable 3 is suppressed. As described above, since the operation of the leakage electromagnetic wave suppression unit 20d is prioritized over the PLC communication stop unit 13a, the PLC communication stop unit 13a does not interrupt the PLC communication during that time. Accordingly, it is possible to prevent the operation of the in-vehicle electronic device 14 from receiving the interference of the PLC communication while continuing the reception of the HMI information by the PLC communication.

  The HMI information conversion unit 20b converts the HMI information extracted by the HMI information extraction unit 20c into a format that can be recognized by the HMI device 2, and transmits the HMI information to the HMI device 2 through the HMI information input / output unit 20a. The user can use the received HMI information in the HMI device 2.

  Next, the operation of the HMI information processing apparatus 20 when transmitting HMI information from the HMI apparatus 2 to the power supply apparatus 4 by PLC communication will be described. In this case, the HMI information held by the HMI device 2 is input to the HMI information conversion unit 20b through the HMI information input / output unit 20a.

  The HMI information conversion unit 20 b converts the HMI information received from the HMI device 2 into a format that can be recognized by the PLC communication device 12 and sends the converted information to the PLC communication device 12. The PLC communication device 12 transmits it to the power supply device 4 by PLC communication.

  Also in this case, the HMI information extraction unit 20c sends a notification (HMI information detection notification) to the leakage electromagnetic wave suppression unit 20d that the content transmitted by the PLC communication device 12 includes HMI information. When the leakage electromagnetic wave suppression unit 20d receives the HMI information detection notification, the leakage electromagnetic wave suppression unit 20d suppresses the leakage electromagnetic wave of the charging cable 3 within a range where the PLC communication is not interrupted. Thereby, it can prevent that the operation | movement of the vehicle-mounted electronic device 14 receives interference of PLC communication, continuing transmission of HMI information by PLC communication.

  Further, during a period in which transmission / reception of HMI information is not performed, the interference suppression apparatus 13 is prevented from interfering with the operation of the in-vehicle electronic device 14 by the interference suppression apparatus 13 by the same operation as in the first embodiment.

  The operation of suppressing the leakage current of the charging cable 3 by the leakage electromagnetic wave suppression unit 20d may be performed at least until the transmission / reception of individual HMI information is completed. For example, a plurality of HMI information such as billing / settlement processing may be performed. May be performed continuously until all transmission / reception is completed (for example, a period from the start of the accounting process to the completion of the settlement process).

  Thus, according to the present embodiment, the effects of the first embodiment can be achieved without interrupting PLC communication including HMI information, such as communication related to user confirmation such as billing / settlement and communication that requires a response from the user. Can be obtained. In addition, since communication of billing / settlement information is not interrupted, it can be applied to an existing billing / settlement system, and a billing / settlement system for charging power of an electric vehicle can be realized at a relatively low cost.

<Embodiment 3>
FIG. 8 is a block diagram illustrating configurations of the PLC communication apparatus and the interference suppression apparatus according to the third embodiment. In the present embodiment, a leakage electromagnetic wave suppression unit 13d is provided instead of the PLC communication stop unit 13a of the interference suppression device 13.

  The leakage electromagnetic wave suppression unit 13d suppresses the leakage electromagnetic wave of the charging cable 3 without interrupting PLC communication, similarly to the leakage electromagnetic wave suppression unit 20d of the HMI information processing apparatus 20 shown in the second embodiment. Here, as a technique for suppressing the leakage electromagnetic wave of the charging cable 3, for example, a technique of controlling the PLC communication state setting unit 12 c of the PLC communication device 12 to reduce the frequency used in the PLC communication, a charging device control unit of the PLC communication device 12. A method of reducing the amount of current flowing through the charging cable 3 by controlling 12b, or a method of performing both of them may be mentioned, but any method may be used as long as PLC communication can be continued.

  In the first embodiment, when the in-vehicle electronic device 14 performs the operation of interfering with the PLC communication, the interference suppression device 13 prevents the occurrence of the interference by stopping the PLC communication. However, in the present embodiment, The same effect can be obtained while continuing the PLC communication.

  Further, in each of the above embodiments, only the case of charging the battery 10 of the vehicle 1 has been described. However, as described above, in the next-generation power network called a smart grid, the in-vehicle battery is discharged (from the vehicle to the grid). Power supply) is also under consideration. The present invention is also applicable to a system that performs PCL communication when discharging a battery.

  12 PLC communication device, 13 interference suppression device, 14 in-vehicle electronic device, 15 door lock communication device, 16 lock / unlock button, 17 portable key, 18 lock / unlock device, 20 HMI information processing device, 11a charge control unit 11b Current value control unit, 12a PLC communication unit, 12b charging device control unit, 12c PLC communication state setting unit, 13a PLC communication stop unit, 13b interference state determination unit, 13c electronic device state acquisition unit, 13d leakage electromagnetic wave suppression unit, 14a status output unit, 140 vehicle door lock system, 15a door lock control unit, 15b door lock communication unit, 15c lock / unlock button status acquisition unit, 20a HMI information input / output unit, 20b HMI information conversion unit, 20c HMI information Extraction unit, 20d leakage electromagnetic wave suppression unit.

Claims (11)

A power line communication device that performs communication using a power line connected to an in-vehicle battery;
It is detected in advance that the in-vehicle electronic device performs a specific bidirectional communication, and while the specific bidirectional communication is performed, the output of the power line communication device and the power line are reduced so that a leakage electromagnetic wave from the power line is reduced. An in-vehicle power line communication system comprising: an interference suppression device that performs first control for controlling at least one of flowing current values. The in-vehicle power line communication system according to claim 1, wherein the interference suppression device stops the power line communication as the first control while the specific bidirectional communication is performed. The in-vehicle power line communication system according to claim 1, wherein the interference suppression device lowers an output frequency of the power line communication device while the specific bidirectional communication is performed as the first control . The in-vehicle power line communication system according to claim 1, wherein the interference suppression device reduces a value of a current flowing through the power line as the first control while the specific bidirectional communication is performed. The specific two-way communication is defined in advance as receiving the interference of the power line communication,
The in-vehicle power line communication according to any one of claims 1 to 4, wherein the interference suppression device has a function of monitoring an operating state of the in-vehicle electronic device and detecting that the specific bidirectional communication is performed. system. The specific two-way communication is defined in advance as receiving the interference of the power line communication,
The in-vehicle power line communication system according to any one of claims 1 to 4, wherein the in-vehicle electronic device has a function of notifying an interference suppression device to that effect when performing the specific bidirectional communication . The interference suppression unit further detects that the transmission and reception of a specific type of information is performed by the power line communication device, while the transmission and reception of the specific type of information is performed, to the extent that the power line communication is not interrupted, the specific type Performing second control for controlling at least one of the output of the power line communication device and the current value flowing through the power line so that the leakage electromagnetic wave from the power line is smaller than when information other than transmission / reception is performed,
The in-vehicle power line communication system according to any one of claims 1 to 6, wherein the second control is performed with priority over the first control . The in-vehicle power line communication system according to claim 7, wherein the interference suppression apparatus lowers an output frequency of the power line communication apparatus while the specific type of information is transmitted and received as the second control . The in-vehicle power line communication system according to claim 7, wherein the interference suppression device decreases a value of a current flowing through the power line while the specific type of information is transmitted and received as the second control . The in-vehicle power line communication system according to any one of claims 7 to 9, wherein the specific type of information is HMI (Human Machine Interface) information. The in-vehicle electronic device is a door lock system having a smart entry function,
The specific bidirectional communication is wireless communication related to key authentication.
The in-vehicle power line communication system according to any one of claims 1 to 10.

Images