JP2012151825A - Power line communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power line communication system, a power line communication apparatus, and a connector device capable of miniaturizing a device for realizing power line communication, relating to a vehicle equipped with a function for the power line communication with a power feeding device through a charge cable.SOLUTION: A connector device 3 is provided with a coupling transformer which is required for power line communication. The coupling transformer is configured by winding an AC line 11 and a signal wiring 13 on an annular toroidal core 15a. A coil 17a is connected to the AC line 11, and a capacitor 17b is connected to an AC line 12. The coil 17a and the capacitor 17b are connected together using a wiring 17c provided along the AC lines 11 and 12, to constitute a filter circuit.

Description

  The present invention relates to a power line communication system in which a vehicle capable of charging a battery by external power supply such as an electric vehicle or a plug-in hybrid vehicle and an external power supply apparatus perform power line communication via a charging cable.

  2. Description of the Related Art In recent years, electric vehicles and hybrid vehicles that are equipped with devices such as a motor and a battery and run by driving the motor with electric power stored in the battery have begun to spread. An electric vehicle needs to be charged from an external power supply device to a battery, and even a hybrid vehicle includes a plug-in hybrid vehicle that can charge the battery from the external power supply device. In vehicles that charge the battery from the outside, connect the plug of the charging cable connected to the external power feeding device to the connector device of the power feeding port provided in the vehicle, and connect the charging cable from the power feeding device to the battery of the vehicle. Power is supplied through the battery, and the battery is charged.

  In Patent Document 1, the DC power receiving unit and the AC power receiving unit that are partitioned from each other are arranged in a single structure power receiving connector, and the first cap that covers the entire open end face of the power receiving connector so as to be openable and closable. And a second cap that allows a through hole opened at a position corresponding to the AC power receiving unit to be closed, and the AC power receiving unit and the DC power receiving unit are integrated into an integrated structure. An electric vehicle charging connector has been proposed.

  On the other hand, when charging the battery of the vehicle from the power supply device, a communication function for transmitting and receiving information for charge control and information for managing charge amount or charge between the vehicle and the power supply device Is required.

  In Patent Document 2, a plurality of electric vehicles and a supply management device perform power line communication, and AC power can be supplied from a plurality of electric vehicles configured to be able to supply AC power to a common power consumption unit. The proposed power system has been proposed. In this power system, a plurality of vehicles that have received a supply start instruction through power line communication transmit identification IDs (IDentifiers) to other vehicles, determine that any vehicle is the master, and notify the other vehicles of the master. Send. The master vehicle generates an AC voltage according to its own cycle, the other vehicles generate an AC voltage synchronized with the master vehicle, and a plurality of vehicles start supplying power to the power load in cooperation with each other.

Japanese Patent Laid-Open No. 7-192826 JP 2008-035665 A

  However, in order to perform power line communication between the vehicle and an external device as in the power system described in Patent Document 2, a coupling transformer for superimposing a signal on the power line and taking out the signal superimposed on the power line, etc. It is necessary to mount a power line communication device (PLC (Power Line Communication) in-vehicle device) in which the above components are mounted on a circuit board on a vehicle. Since parts such as coupling transformers have a certain limit in reducing the size, the PLC on-board unit (the circuit board) tends to increase in size. A vehicle such as an electric vehicle is equipped with a large number of electronic devices, and the space for disposing the devices in the vehicle is limited.

  The present invention has been made in view of such circumstances, and an object of the present invention is to realize power line communication in a vehicle having a function of performing power line communication with a power feeding device via a charging cable. An object of the present invention is to provide a power line communication system that enables downsizing of a device for the purpose.

  A power line communication system according to the present invention is a power line communication system in which a vehicle and a power feeding device are connected by a charging cable, and power line communication is performed between the power line communication device mounted on the vehicle and the power feeding device via the charging cable. The charging cable includes two power supply wires, and the power line communication device includes two power supply internal wires respectively connected to the power supply wires of the charging cable and the two power supplies. An electromagnetic induction type signal converter having a filter circuit connected between the internal wirings, a primary coil provided in one internal wiring for power supply, and a secondary coil electromagnetically coupled to the primary coil; A connector device to which the charging cable is connected, and the connector device includes a plurality of connection terminals for connecting to the charging cable, and the plurality of connection terminals. A connector main body that includes the two power supply internal wirings, a plurality of internal wirings connected to the connection terminals, and a cylindrical portion that is provided in the connector main body and through which the plurality of internal wirings are inserted. And an annular magnetic body arranged around the cylindrical portion, and a signal wiring wound around the annular magnetic body, and the power feeding device is connected to the power supply wiring of the charging cable, respectively. Two power supply internal wirings, a filter circuit connected between the two power supply internal wirings, a primary coil provided in one of the power supply internal wirings, and electromagnetic coupling to the primary coil And an electromagnetic induction type signal converter having a secondary coil, wherein one power supply internal wiring is wound around the annular magnetic body, the annular magnetic body, and the one power supply By the internal wiring and the signal wiring, An electromagnetic induction type signal converter of the power line communication device is configured, the two power supply internal wirings and the filter circuit of the power line communication device, the two power supply wirings of the charging cable, and the power supply A current loop circuit is configured by two power supply internal wirings and a filter circuit of the device, and the power line communication device and the power feeding device are configured to transmit a signal to the charging cable by each signal converter. The superposition and the extraction of the signal superposed on the charging cable are performed.

In the present invention, a charging cable including two power supply wirings (two AC (Alternating Current) lines in a single-phase three-wire AC power supply (that is, two wirings other than the ground wiring)) is connected. By doing so, the power line communication device mounted on the vehicle and the power supply device perform power line communication via the charging cable. The power line communication device and the power feeding device include a filter circuit connected between two power supply internal wires connected to a power supply wire of a charging cable, and an electromagnetic induction type signal provided in one of the power supply internal wires. And a converter.
When the signal converter of the power line communication device and the signal converter of the power feeding device are provided in one power supply internal wiring, the power supply internal connected to one (common) power supply wiring of the charging cable Provide for each wiring. The filter circuit can be composed of a coil and / or a capacitor. The signal converter can be configured as a primary coil by winding one power supply internal wiring around a magnetic core and winding a signal wiring connected to a power line communication circuit or the like around the core. .
In this configuration, when the vehicle and the power supply device are connected by a charging cable, the two power supply internal wirings and filter circuit of the power line communication device, the two power supply wirings of the charging cable, and the power supply device A closed current loop circuit is constituted by the two internal wirings for power supply and the filter circuit. The power line communication device and the power supply device of the vehicle perform signal superimposition on the charging cable (one power supply internal wiring and power supply wiring) and take out the superimposed signal by using a signal converter included in each vehicle. And power line communication can be performed.
In the power line communication method, a configuration in which a signal converter is connected between two internal wires for power supply to superimpose and extract signals is common, but in this configuration, it is necessary to provide a large choke coil or the like. There is a risk that the power line communication device will be enlarged. In contrast, the configuration of the present invention does not require a choke coil or the like. However, in the configuration of the present invention, there is a risk that the magnetic material forming the core of the signal converter is larger than a general configuration in which the signal converter is connected between the internal wirings for power supply. The core of the signal converter can be provided integrally with a connector device for connecting a charging cable.

In the present invention, a signal converter for power line communication is provided in the connector device to which the charging cable is connected, and the power line communication device is downsized (the entire device for power line communication in the vehicle including the connector device is reduced in size). Realized).
The connector device is provided with a cylindrical portion through which a plurality of internal wirings connected to the connection terminals are inserted in a connector main body that accommodates a plurality of connection terminals for connection with a charging cable. An annular magnetic material that forms the core of the signal converter is arranged. The plurality of internal wirings that pass through the cylindrical portion include two internal wirings for power supply. One of the internal wirings for power supply is wound around the annular magnetic body, and a signal wiring that transmits a signal of power line communication Is provided. One of the internal wiring for power supply and the signal wiring wound around the annular magnetic body become a primary coil and a secondary coil, and an electromagnetic induction type signal converter is configured.
Accordingly, since it is not necessary to provide a large signal converter on the circuit board of the power line communication device, the power line communication device can be reduced in size, and further, other devices in the vehicle (for example, body ECU (Electronic Control) Unit)) and a CPU (Central Processing Unit) can be shared to integrate the power line communication device.

In the present invention, a filter circuit is connected between the two power supply internal wires. The power line communication device can be further miniaturized by adopting a configuration in which the filter circuit is directly connected to the two power supply internal wirings rather than the circuit board of the power line communication device.
In addition, when a device such as a charger or a converter of a vehicle to which two internal wires for power supply are connected has a coil or a capacitor of a filter circuit to be connected between the internal wires for power supply, these coils or A capacitor or the like may be used as the filter circuit.

  Further, in the present invention, when the filter circuit connected between the two power supply internal wirings is composed of a plurality of electronic components such as a coil and a capacitor, it is necessary to connect the plurality of electronic components by wiring. is there. In this case, a plurality of electronic devices are connected by wiring provided along the power supply internal wiring to which the electronic component is connected. Thus, when the power supply internal wiring is laid in the vehicle, the wiring for connecting the electronic components can be laid along the power supply internal wiring.

  Moreover, in this invention, a signal converter can be mounted in a connector apparatus and transmission of the electromagnetic waves between the connector apparatus inside and the exterior can be suppressed.

  In the case of the present invention, by connecting the vehicle and the power supply device with the charging cable, the current loop circuit is configured by the two wirings for supplying power and the two filter circuits connected between them, In the power supply device, an electromagnetic induction type signal converter is provided on one internal wiring for power supply to superimpose and extract signals, thereby connecting the signal converter between the internal power supply wiring. There is no need to provide a choke coil or the like necessary for the configuration of the power line communication, which can contribute to the miniaturization of the power line communication device.

  Further, according to the present invention, a signal converter for power line communication is provided in a connector device to which a charging cable is connected. For example, two internal wires for power supply are inserted into a cylindrical portion provided in the connector, one power supply line is wound around an annular magnetic body provided around the cylindrical portion, and a signal for power line communication is transmitted. By adopting a configuration in which the signal wiring to be transmitted is wound, an electromagnetic induction type signal converter is configured by the annular magnetic body, one power supply line, and the signal wiring. Therefore, it is not necessary to provide a signal converter on the circuit board of the power line communication device, and the power line communication device can be downsized.

  Furthermore, in the case of the present invention, by including a signal converter in the connector device, noise such as electromagnetic waves radiated from other electronic devices located inside and outside the vehicle is blocked by the connector device, thereby adversely affecting communication. Can be reduced. Moreover, since the electromagnetic wave radiated | emitted from a signal converter can be interrupted | blocked with a connector apparatus, the bad influence which the noise by the transmitted electromagnetic waves has with respect to the electronic device inside and outside a vehicle can be reduced.

  In addition, AC connectors such as 100V / 230V that are energized to the power supply internal wiring can be insulated by the connector device, so that a low voltage of about several volts and a small current are applied to the communication line wired in the vehicle. Therefore, the communication line can be thinned. In addition, since it is not always necessary to input commercial power to a device related to communication, it is not necessary to secure an insulation distance, and space saving can be realized.

It is a schematic diagram for demonstrating the structural example of the power line communication system which concerns on embodiment of this invention. It is a block diagram which shows the internal structural example of the electric vehicle corresponding to the power line communication system which concerns on embodiment of this invention. It is a schematic diagram for demonstrating the structural example of the power line communication system which concerns on embodiment of this invention. It is a chart which shows an example of the filter circuit in the power line communication system concerning an embodiment of the invention. It is an external appearance perspective view which shows the structural example of the connector apparatus which concerns on embodiment of this invention. It is an external appearance perspective view which shows the structural example of the connector apparatus which concerns on embodiment of this invention.

  Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. FIG. 1 is a schematic diagram for explaining a configuration example of a power line communication system according to an embodiment of the present invention. In the present embodiment, when a charging stand (power feeding device) and an electric vehicle are connected with a charging cable in order to charge a battery of an electric vehicle (vehicle), information such as charging control, user authentication or billing management, A configuration for transmitting and receiving between a desk lamp and an electric vehicle by power line communication using a charging cable will be described as an example.

  A charging cable for connecting an electric vehicle and a charging station includes two power supply wirings (hereinafter simply referred to as AC lines) 71 and 72 to which an alternating voltage is applied, and a grounding wiring connected to a ground potential (FIG. 1). The illustration is omitted). In the present embodiment, a three-wire AC voltage using two AC lines and one ground wiring is supplied from the charging station to the electric vehicle.

  The charging stand is connected to AC lines 71 and 72 of the charging cable, and has two internal wirings (hereinafter simply referred to as AC lines) 51 and 52 for supplying power to which an AC voltage from the power source is applied. . In the charging station, a capacitor 56 is connected between the two AC lines 51 and 52, and one AC line 51 has a coupling transformer (electromagnetic induction) between the connection point of the charging cable and the connection point of the capacitor 56. 55) is provided. The capacitor 56 between the AC lines 51 and 52 constitutes a band pass filter circuit. The coupling transformer 55 has a primary side connected to the AC line 51 and a secondary side connected to a power line communication unit (not shown) in the charging station.

  Similarly, an electric vehicle is connected to AC lines 71 and 72 of a charging cable, and two internal wirings for power supply (hereinafter simply referred to as AC lines) that lead the electric power from the charging stand and the charging cable to a charger in the vehicle. 11). In the electric vehicle, a capacitor 16 is connected between the two AC lines 11 and 12, and one AC line 11 is provided with a coupling transformer 15 between the connection point of the charging cable and the connection point of the capacitor 16. It has been. The capacitor 16 between the AC lines 11 and 12 constitutes a band-pass filter circuit. However, when a similar capacitor is mounted in the charger, it may be shared with this capacitor. The coupling transformer 15 has a primary side connected to the AC line 11 and a secondary side connected to a power line communication unit (not shown in FIG. 1) in the electric vehicle.

  By connecting the charging station and the electric vehicle with a charging cable, the AC line 51 of the charging station, the AC line 71 of the charging cable and the AC line 11 of the electric vehicle, the AC line 52 of the charging station, the charging Two power supply paths are configured, that is, an energization path to which the AC line 72 of the cable and the AC line 12 of the electric vehicle are connected. At this time, the AC line 11 of the electric vehicle provided with the coupling transformer 15 and the AC line 51 of the charging stand provided with the coupling transformer 55 are connected via the same AC line 71 of the charging cable. Moreover, it is preferable that the connection position of the charging cable is determined. In a state where the charging station and the electric vehicle are connected by a charging cable, a current loop circuit closed by the two power supply paths and the capacitors 16 and 56 is configured, and a coupling disposed in the loop. The transformers 15 and 55 can superimpose signals on the AC lines 11, 51, and 71 and take out the superimposed signals, so that power line communication can be performed between the charging station and the electric vehicle.

  FIG. 2 is a block diagram illustrating an internal configuration example of an electric vehicle corresponding to the power line communication system according to the embodiment of the present invention, and illustrates blocks related to charging and communication of the electric vehicle. The electric vehicle 1 according to the present embodiment is equipped with a body ECU 2, a connector device 3, a charger 4, a battery 5, a power management ECU 6, and the like. In the electric vehicle 1 according to the present embodiment, a coupling transformer 15 necessary for performing power line communication is provided in the connector device 3, and the power line communication unit 22 that performs processing of information transmitted / received by power line communication or processing of signals is provided on the body. By providing the ECU 2, a function for performing power line communication is distributed and integrated in the body ECU 2 and the connector device 3. That is, the power line communication unit 22 of the body ECU 2 and the coupling transformer 15 of the connector device 3 constitute the power line communication device according to the present embodiment.

  The body ECU 2 performs lock / unlock control of the door of the electric vehicle 1 or lighting control of a headlight or the like, and includes a control unit 21, a power line communication unit 22, a wireless communication unit 23, a CAN (Controller Area Network). ) The communication unit 24 and the power supply circuit 25 are provided. Specifically, the control unit 21 includes a processing device such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit), and performs operation control of each unit in the body ECU 2 and various arithmetic processes. In particular, in the present embodiment, the control unit 21 is configured to be able to exchange data with the power management ECU 6 of the electric vehicle 1, and provides the transmission data given from the power management ECU 6 to the power line communication unit 22 to perform power line communication. While performing data transmission, the power line communication part 22 performs the process which gives the received data received by power line communication to power management ECU6.

  The power line communication unit 22 is connected to the coupling transformer 15 provided in the connector device 3 via the signal wiring 13 (however, the signal wiring 13 is wound around the toroidal core 15a of the coupling transformer 15). And constitutes a secondary coil and is also a part of the coupling transformer 15). The power line communication unit 22 superimposes the signal on the AC line 11 by the coupling transformer 15 by outputting a signal corresponding to the transmission data given from the control unit 21 to the signal wiring 13, and a charging stand via the charging cable. Send data to. In addition, the power line communication unit 22 acquires a signal on the signal wiring 13 to extract a signal from the charging station superimposed on the AC line 11 and gives the reception data corresponding to this signal to the control unit 21.

  The wireless communication unit 23 performs wireless communication with communication devices inside and outside the vehicle, such as a mobile phone held by the user. The CAN communication unit 24 performs wired communication with other devices mounted on the electric vehicle 1. The wireless communication unit 23 and the CAN communication unit 24 transmit data provided from the control unit 21 and provide the received data to the control unit 21. The power supply circuit 25 supplies electric power supplied from the battery 5 (or another battery) of the electric vehicle 1 to each part in the body ECU 2 by adjusting a voltage value.

  The connector device 3 is for connecting a charging cable to the electric vehicle 1, and includes a connector body 30 provided with a plurality of connection terminals, a power line communication coupling transformer 15 and a filter circuit 17. Has been. AC lines 11 and 12 are connected to two connection terminals provided on the connector main body 30, and the AC lines 11 and 12 are connected to the charger 4 of the electric vehicle 1 via the filter circuit 17. The filter circuit 17 is realized by a capacitor 16 connected between the AC lines 11 and 12, as shown in FIG.

  The coupling transformer 15 provided in the connector device 3 is configured by winding one AC line 11 and signal wiring 13 around a toroidal core 15a that is an annular magnetic body. The other AC line 12 is provided through the toroidal core 15a. The detailed configuration of the connector device 3 will be described later.

  The charger 4 charges the battery 5 with electric power supplied from a charging stand. Since the charging stand is for supplying power with an AC voltage of, for example, a voltage of 200 V and a frequency of 50 Hz or 60 Hz, the charger 4 converts the AC voltage into a DC voltage and applies it to the battery 5. To charge. The battery 5 accumulates drive power of a motor (not shown) that drives the electric vehicle, and is, for example, a lithium ion battery. The power management ECU 6 performs control related to charging of the electric vehicle, and receives information from the charging station (for example, voltage value, frequency or billing information of the supplied power) by power line communication by the power line communication unit 22 of the body ECU 2. Acquisition control is performed by controlling the operation of the charger 4 and the like based on the acquired information.

  FIG. 3 is a schematic diagram for explaining a configuration example of the power line communication system according to the embodiment of the present invention. The configuration of the power line communication system shown in FIG. 3 is substantially equivalent to the configuration of the power line communication system shown in FIG. 1, and specifically shows the configuration of the coupling transformers 15 and 55 using the toroidal cores 15a and 55a. It is. Since the coupling transformer 15 of the electric vehicle 1 and the coupling transformer 55 of the charging stand have substantially the same configuration, the configuration of the coupling transformer 15 of the electric vehicle 1 will be described below and the coupling transformer 55 of the charging stand will be described. Description of is omitted.

  The coupling transformer 15 provided in the connector device 3 of the electric vehicle 1 for power line communication is configured using a toroidal core 15a that is an annular magnetic body. The coupling transformer 15 causes one AC wire 11 to be wound around the toroidal core 15a (more than one rotation), the other AC wire 12 is inserted into the toroidal core 15a, and a signal wiring connected to the power line communication unit 22 13 is wound around the toroidal core 15a (one rotation or more). With this configuration, the AC wire 11 wound around the toroidal core 15a and the AC wire 12 inserted through the toroidal core 15a become a primary coil, and the signal wiring 13 wound around the toroidal core 15a becomes a secondary coil. It functions as a coupling transformer 15.

  In the example shown in FIG. 3, the filter circuit 17 connected between the AC lines 11 and 12 has a configuration in which a coil 17a and a capacitor 17b are connected in series. Specifically, in the filter circuit 17, one end of the coil 17a is connected to one AC line 11, one end of the capacitor 17b is connected to the other end of the coil 17a, and the other end of the capacitor 17b is connected to the other AC line 12. It is a configuration. The configuration of the filter circuit 17 is not limited to the one shown in the figure, and a circuit configuration suitable for these is considered in consideration of the communication speed of power line communication, the resistance value and capacity value of the communication path, or the characteristics of the toroidal core 15a. be able to.

  FIG. 4 is a chart showing an example of the filter circuit 17 in the power line communication system according to the embodiment of the present invention, and shows specific examples of circuit constants for the coil 17a and the capacitor 17b of the filter circuit 17. For example, when performing power line communication with high-speed communication at a frequency of 2 to 30 MHz, the inductance of the coil 17a of the filter circuit 17 is preferably 10 μH or more, and the capacitance of the capacitor 17b is preferably about 5 to 15 nF. In addition, for example, when power line communication is performed at low speed with a frequency of 10 to 150 kHz, the inductance of the coil 17a of the filter circuit 17 is preferably 500 μH or more, and the capacitance of the capacitor 17b is about 0.5 to 1.5 μF. Is preferred.

  5 and 6 are external perspective views showing a configuration example of the connector device 3 according to the embodiment of the present invention. The external appearance of the portion that is inside the vehicle when mounted on the electric vehicle 1 is shown in FIG. The parts are illustrated from different directions in a disassembled state.

  The connector device 3 includes a connector main body 30 that accommodates a plurality of connection terminals (not shown) to which two AC wires 11 and 12 and one grounding wiring 14 are connected. The connector main body 30 includes a mounting portion 31 having a substantially rectangular plate shape, and a cylindrical tubular portion 32 protruding from the center of one surface of the mounting portion 31. Attachment holes 33 are formed at the four corners of the attachment portion 31 so that the connector body 30 can be attached to a predetermined position of the vehicle body of the electric vehicle 1 with a screw or the like. The connector body 30 is attached so that the side on which the cylindrical portion 32 is provided is the inside of the vehicle body.

  The other surface of the attachment portion 31 of the connector main body 30 is provided with a cable connection portion 34 that is cylindrical and into which a charging cable is inserted and connected during charging. The cable connection portion 34 houses therein a plurality of connection terminals connected to the AC wires 11 and 12 and the ground wiring 14 and is electrically connected to the charging cable. The cable connecting portion 34 is provided with a cover 35 that can be opened and closed so as to close the opening in order to prevent the connection terminals from being exposed when the charging cable is not connected.

  The AC wires 11 and 12 and the ground wiring 14 connected to the plurality of connection terminals accommodated in the cable connection portion 34 penetrate the front and back of the attachment portion 31 of the connector body 30 and pass through the cylindrical portion 32. It is provided in an aspect. One AC wire 11 that is inserted into the electric vehicle 1 through the cylindrical portion 32 is wound around a toroidal core 15a that is an annular magnetic body. The other AC wire 12 and grounding wire 14 are arranged inside the electric vehicle 1 without being wound around the toroidal core 15a. Further, the signal wiring 13 connected to the power line communication unit 22 of the body ECU 2 is wound around the toroidal core 15a.

  The toroidal core 15 a for constituting the coupling transformer 15 has an annular shape whose diameter is smaller than that of the cylindrical portion 32 of the connector main body 30. The toroidal core 15a may be fixed to the connector device 3 or the vehicle body of the electric vehicle 1 or may be bundled together with the AC wires 11 and 12 and the grounding wiring 14 without being fixed and laid in the electric vehicle 1. .

  The connector device 3 shown in FIGS. 5 and 6 is configured such that the other AC line 12 does not pass through the toroidal core 15a. However, the present invention is not limited to this, and the inside of the toroidal core 15a as shown in FIG. It is good also as a structure penetrated. Moreover, although the connector apparatus 3 was set as the structure which wound one AC wire 11 around the toroidal core 15a, the structure which only penetrates the AC wire 11 in the toroidal core 15a is not restricted to this. Furthermore, although the toroidal core 15a is configured to have a smaller diameter than the cylindrical portion 32, the present invention is not limited thereto, and a configuration having the same diameter as the cylindrical portion 32 or a larger diameter than the cylindrical portion 32 may be used.

  The AC lines 11 and 12 and the ground wiring 14 are obtained by covering conductive wires with an insulator. One AC line 11 is connected to the portion of the conductive wire exposed by removing a part of the insulator at an appropriate position from the portion wound around the toroidal core 15a to the charger 4. The terminals are connected by a method such as soldering or welding. Similarly, the other AC line 12 extends from the cylindrical portion 32 to reach the charger 4 at a suitable position where one part of the capacitor 17b is exposed to a portion of the conductive line exposed by removing a part of the insulator. Are connected by a method such as soldering or welding. The other terminal of the coil 17 a and the other terminal of the capacitor 17 b are connected by a wiring 17 c arranged along the AC lines 11 and 12. Thereby, the filter circuit 17 connected between the AC lines 11 and 12 is configured.

  The two AC wires 11 and 12 are arranged in the electric vehicle 1 and arranged up to the charger 4. The connection position of the coil 17a and the connection position of the capacitor 17b are related to the length direction of the AC lines 11 and 12. The coil 17a and the capacitor 17b are connected to each other by a wiring 17c having a length substantially equal to the distance. As a result, it is possible to easily arrange the AC lines 11 and 12 and the wiring 17c side by side in the electric vehicle 1, and it is also easy to bundle these wirings and bend them in place.

  In the power line communication system having the above configuration, the coupling transformer 15 necessary for power line communication is provided in the connector device 3, and the power line communication unit 22 that inputs and outputs signals to the coupling transformer 15 and performs processing related to power line communication is provided on the body. With the configuration provided in the ECU 2, it is possible to save the space for arranging the power line communication device in the electric vehicle 1. The coupling transformer 15 is formed by winding the AC wire 11 and the signal wiring 13 around the annular toroidal core 15a, so that the size of the device is smaller than that of a conventional connector device that does not have the coupling transformer 15. The coupling transformer 15 can be provided in the connector device 3 while minimizing the increase in size.

  In addition, the electric vehicle 1 and the charging station are connected by a charging cable to form two power supply paths (AC lines 11, 71, 51 and AC lines 12, 72, 52). Provided in one path by connecting a filter circuit between the two paths in the car 1 and the charging station to form a current loop circuit closed by the two power supply paths and the two filter circuits The electric vehicle 1 and the charging station can perform power line communication using the coupling transformers 15 and 55. Instead of connecting a coupling transformer between the two AC lines 11 and 12 to perform power line communication, an electric vehicle is configured by providing a coupling transformer 17 on one AC line 11 to perform power line communication. It is not necessary to connect a large choke coil or the like to the AC wires 11 and 12 in the apparatus 1, and the apparatus can be downsized.

  Further, the coil 17 a is connected to the AC line 11, the capacitor 17 b is connected to the AC line 12, and the coil 17 a and the capacitor 17 b are connected by the wiring 17 c provided along the AC lines 11 and 12 to constitute the filter circuit 17. As a result, it is not necessary to mount the filter circuit 17 on the circuit board of the device such as the body ECU 2 or the power line communication device, so that the device can be downsized. Further, when the AC lines 11 and 12 are laid in the electric vehicle 1, the wiring 17 c connecting the coil 17 a and the capacitor 17 b can be easily laid together with the AC lines 11 and 12.

  In the present embodiment, the power line communication unit 22 that performs signal processing of the power line communication device is provided in the body ECU 2. However, the present invention is not limited to this, and the electric vehicle 1 is separated from the body ECU 2. It is good also as a structure which mounts a power line communication apparatus and provides the power line communication part 22 in this power line communication apparatus. Even in this case, since it is not necessary to mount the coupling transformer 15 on the circuit board of the power line communication device, the power line communication device can be downsized. Moreover, you may integrate the power line communication part 22 which performs the signal processing of a power line communication apparatus into ECU which has CPU other than body ECU2.

  Further, although the electric vehicle 1 has been described as an example of a vehicle having a power line communication function, the present invention is not limited to this, and other vehicles having a function of charging a battery from the outside, such as a plug-in hybrid vehicle. May be. Moreover, although the charging stand has been described as an example of a power supply device having a power line communication function, the present invention is not limited to this, and may be another device having a function of supplying power to the vehicle via a charging cable. . For example, when a user connects a charging cable to an outlet at home to charge the vehicle, a configuration in which a power line communication device is provided on a distribution board at home may be used. Furthermore, the structure which mounts the circuit which performs power line communication in a charging cable may be sufficient.

  In the power line communication system according to the above-described embodiment, the primary coil of the coupling transformer 15 is provided on one AC line 11 on the electric vehicle side, and similarly, the coupling transformer 55 is provided on one AC line 51 on the charging stand side. However, the present invention is not limited to this.

1 Electric car (vehicle)
2 Body ECU (Power Line Communication Device)
3 Connector device 11 AC line (One internal wiring for power supply)
12 AC line (the other internal wiring for power supply)
13 Signal wiring 14 Grounding wiring (internal wiring)
15 Coupling transformer (electromagnetic induction type signal converter)
15a Toroidal core (cyclic magnetic body)
16 Capacitor 17 Filter circuit 17a Coil 17b Capacitor 17c Wiring 21 Control part 22 Power line communication part 30 Connector body 31 Mounting part 32 Cylindrical part 33 Mounting hole 51, 52 AC line (Internal wiring for power supply)
55 Coupling transformer (electromagnetic induction type signal converter)
55a Toroidal core 56 Capacitor (filter circuit)
71, 72 AC line (power supply wiring)

Claims (1)

In a power line communication system that connects a vehicle and a power supply device with a charging cable, and performs power line communication between the power line communication device mounted on the vehicle and the power supply device via the charging cable,
The charging cable includes two power supply wires,
The power line communication device includes two power supply internal wires respectively connected to the power supply wires of the charging cable, a filter circuit connected between the two power supply internal wires, and one power An electromagnetic induction type signal converter having a primary coil provided in the supply internal wiring and a secondary coil electromagnetically coupled to the primary coil, and a connector device to which the charging cable is connected;
The connector device includes:
A plurality of connection terminals for connecting to the charging cable, a connector main body that accommodates the plurality of connection terminals, and a plurality of internal terminals connected to the connection terminals, including the two internal wires for power supply A wire, a tubular portion provided in the connector body, through which the plurality of internal wires are inserted, an annular magnetic body disposed around the tubular portion, and a signal wire wound around the annular magnetic body; Have
The power supply device
Provided in two power supply internal wires respectively connected to the power supply wires of the charging cable, a filter circuit connected between the two power supply internal wires, and one of the power supply internal wires And an electromagnetic induction type signal converter having a secondary coil electromagnetically coupled to the primary coil,
One power supply internal wiring is wound around the annular magnetic body,
The annular magnetic body, the one internal wiring for power supply and the signal wiring constitute an electromagnetic induction type signal converter of the power line communication device,
Two power supply internal wires and filter circuit of the power line communication device, two power supply wires of the charging cable, and two power supply internal wires and filter circuit of the power supply device A loop circuit is configured,
The power line communication apparatus and the power supply apparatus are configured to superimpose a signal on the charging cable and take out a signal superimposed on the charging cable by each signal converter.

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