JP2012100253A - Connector device, power line communication apparatus, and power line communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector device, power line communication apparatus, and power line communication system, for smaller size of the device for realizing power line communication, relating to a vehicle equipped with a function for power line communication with a power feeding device through a charging cable.SOLUTION: A coupling transformer required for power line communication is provided to a connector device 3. The coupling transformer includes a solenoid core 15a stored in a tubular part 32 of the connector device 3, and an AC line 11 and signal wiring 13 wound on the outer periphery of the tubular part 32. Further, a coil 17a is connected to the AC line 11, a capacitor 17b is connected to the AC line 12, and the coil 17a and the capacitor 17b are connected together using wiring 17c that is provided along the AC lines 11 and 12, to constitute a filter circuit.

Description

  The present invention is provided in a vehicle such as an electric vehicle or a plug-in hybrid vehicle, and is connected to a connector device for connecting a charging cable for supplying power from an external power supply device, and power is supplied through the charging cable connected to the connector device. The present invention relates to a power line communication device that performs power line communication with a device, and a power line communication system that performs power line communication with a power feeding device using the power line communication device.

  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. It is an object of the present invention to provide a connector device, a power line communication device, and a power line communication system that enable downsizing of the device.

  A connector device according to the present invention includes a plurality of connection terminals, a connector that accommodates the plurality of connection terminals, and a plurality of internal wires that include two power supply internal wires and are connected to the connection terminals. In the connector device, the cylindrical portion provided in the connector and through which the plurality of internal wires are inserted, one or a plurality of magnetic bodies disposed in the cylindrical portion, and wound around the outer periphery of the cylindrical portion One power supply internal wiring is wound around the cylindrical portion, and electromagnetic induction for power line communication is performed by the magnetic body, the one power supply internal wiring, and the signal wiring. A signal converter of the formula is configured.

  The connector device according to the present invention further includes a filter circuit connected between the two power supply internal wires.

  In the connector device according to the present invention, the filter circuit includes a plurality of electronic components, and the plurality of electronic components are connected by wiring provided along the internal wiring for power supply. And

  The connector device according to the present invention further includes a protection element for surge protection connected between the two internal wires for power supply.

  The connector device according to the present invention further includes a fuse provided in the internal wiring for power supply.

  The power line communication device according to the present invention performs power line communication using the above-described connector device, and a signal converter configured by the magnetic body of the connector device, the one internal wiring for power supply, and the signal wiring. And a power line communication unit for performing the operation.

  The power line communication system according to the present invention is a power line communication in which a vehicle and a power supply 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 supply device via the charging cable. In the system, 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 supply wires. An electromagnetic induction type signal having a filter circuit connected between the internal power supply wires, a primary coil provided in one or both of the internal power supply wires, and a secondary coil electromagnetically coupled to the primary coil The power supply device includes two power supply internal wirings respectively connected to the power supply wirings of the charging cable, and the two power supply internal wirings. A filter circuit connected in between, and a primary coil provided in one or both of the internal power supply wirings and an electromagnetic induction signal converter having a secondary coil electromagnetically coupled to the primary coil. And two power supply internal wirings and filter circuits of the power line communication device, two power supply wirings of the charging cable, and two power supply internal wirings and filter circuits of the power feeding device. The power line communication device and the power feeding device perform signal superimposition on the charging cable and extraction of the signal superimposed on the charging cable by each signal converter. It is characterized by that.

  In the power line communication system according to the present invention, the power line communication device includes a connector device mounted on the vehicle and connected to the charging cable, and the connector device is connected to the charging cable. A plurality of connection terminals, a connector main body that accommodates the plurality of connection terminals, the plurality of internal wires for supplying power, the plurality of internal wirings connected to the connection terminals, and the connector main body. A cylindrical portion through which the plurality of internal wirings are inserted; one or more magnetic bodies disposed in the cylindrical portion; and a signal wiring wound around the outer periphery of the cylindrical portion; Both power supply internal wires are wound around the cylindrical portion, and the magnetic body, the one or both of the power supply internal wires and the signal wires are used to generate electromagnetic induction signals of the power line communication device. The converter is configured And wherein the Rukoto.

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 into a connector that accommodates a plurality of connection terminals for connection with a charging cable. Inside the cylindrical portion, a rod-like magnetic body forming the core of the signal converter is accommodated together with a plurality of internal wirings. The plurality of internal wirings that pass through the cylindrical portion include two internal wirings for power supply, and one of the internal wirings for power supply is provided by being wound around the outer periphery of the cylindrical portion. Further, a signal wiring for transmitting a power line communication signal is provided around the outer periphery of the cylindrical portion. As a result, one of the internal wiring for power supply and the signal wiring are wound around the magnetic body provided in the cylindrical portion, and therefore, these become the primary coil and the secondary coil and become electromagnetic An inductive 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.

  In the present invention, a protection element for surge protection is connected between the two internal wirings for power supply. For example, a varistor or the like can be used as the protective element. Even if a lightning strike occurs during charging of the vehicle and an excessive voltage is applied to the charging system of the vehicle due to lightning surges, etc., a protective element is provided in the connector device provided at the power supply port of the vehicle. The device inside the vehicle can be protected from surge by the connector device.

  In the present invention, a fuse is provided in the internal wiring for power supply. The fuse may be provided in any of the two internal wirings for supplying power. When it is set as the structure which connects a protection element to a connector apparatus as mentioned above, it is preferable to provide a fuse outside a vehicle (between a connection terminal and a protection element) rather than a protection element. Even when an excessive current flows from the outside during charging of the vehicle, the internal wiring for power supply is interrupted by the fuse, so that an excessive current can be prevented from flowing into the subsequent power receiving system.

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 external power supply device perform power line communication via the charging cable. A power line communication device and a power supply device are provided with an electromagnetic induction type signal converter provided in one power supply internal wiring connected to a power supply wiring of a charging cable, and a filter connected between the two power supply internal wirings. Each with a circuit.
Note that the signal converter of the power line communication device and the signal converter of the power feeding device are respectively provided in the power supply internal wiring connected to one (common) power supply wiring of the charging cable. 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 power supply internal wirings to superimpose and extract signals is common, but in this configuration, it is necessary to provide a large choke coil, etc. There is a possibility 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.

  Further, in the case of the present invention, by providing an electromagnetic induction type signal converter for power line communication in the connector device, the connector device can reduce noise such as electromagnetic waves radiated from other electronic devices located inside and outside the vehicle. And the influence on the signal superimposed on the charging cable can be reduced. Moreover, since the electromagnetic wave radiated | emitted from a signal converter can be interrupted | blocked with a connector apparatus, the 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.

  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, and a magnetic material is arranged in the cylindrical portion, and the signal wiring for transmitting a signal of power line communication with one of the internal wires for power supply Are wound around the cylindrical portion to provide an electromagnetic induction type signal converter by the 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.

It is a schematic diagram for demonstrating the structure of the power line communication system which concerns on this Embodiment. It is a block diagram which shows the internal structure of the electric vehicle carrying the power line communication apparatus which concerns on this invention. It is a schematic diagram for demonstrating the structure of the power line communication system which concerns on this Embodiment. 4 is a chart showing an example of a filter circuit shown in FIG. 3. It is an appearance perspective view showing the composition of the connector device concerning the present invention. It is a side view which shows the structure of the connector apparatus which concerns on this invention. It is an external appearance perspective view which shows the structure of a connector main body. It is a typical top view which shows the structure of a cylindrical part. It is a schematic diagram for demonstrating the structure of the power line communication system which concerns on the modification 1. FIG. FIG. 10 is a schematic diagram for explaining a configuration of a power line communication system according to Modification 2.

  Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. FIG. 1 is a schematic diagram for explaining the configuration of the power line communication system according to the present embodiment. 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 power receiving stand and the electric vehicle.

  FIG. 2 is a block diagram showing an internal configuration of an electric vehicle equipped with the power line communication device according to the present invention, and shows 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 a power line communication device according to the present invention.

  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 solenoid 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 solenoid core 15a which is a rod-shaped magnetic body. The other AC wire 12 is not wound around the solenoid 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 the configuration of the power line communication system according to the present embodiment. 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 solenoid 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 30 of the electric vehicle 1 for power line communication is configured using a solenoid core 15a that is a rod-shaped magnetic body. The coupling transformer 15 causes one AC wire 11 to be wound around the solenoid core 15a (one rotation or more) and the signal wiring 13 connected to the power line communication unit 22 to be wound around the solenoid core 15a (one rotation or more). It is a configuration. With this configuration, the AC wire 11 wound around the solenoid core 15 a serves as a primary coil, and the signal wiring 13 wound around the solenoid core 15 a serves as a secondary coil and functions as the 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 solenoid core 15a. be able to.

  FIG. 4 is a chart showing an example of the filter circuit 17 shown in FIG. 3, and shows specific examples of circuit constants for the coil 17 a and the capacitor 17 b 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.

  FIG. 5 is an external perspective view showing the configuration of the connector device 3 according to the present invention, and shows the external appearance of the portion that is inside the vehicle when mounted on the electric vehicle 1. FIG. 6 is a side view showing the configuration of the connector device 3 according to the present invention, which is a configuration of the connector device 3 as viewed from the back in FIG.

  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.

  FIG. 7 is an external perspective view showing the configuration of the connector main body 30, and illustrates the connector main body 30 as a single unit. FIG. 8 is a schematic plan view showing the configuration of the cylindrical portion 32. In the cylindrical portion 32 of the connector main body 30, a plurality of insertion tubes 36 for interpolating the AC wires 11 and 12 and the ground wiring 14 are provided integrally with the cylindrical portion 32. The plurality of intubations 36 are provided side by side in the inner circumferential direction of the cylindrical portion 32.

  Further, in the cylindrical portion 32, there are a plurality of gaps 37 between the inner peripheral surface of the cylindrical portion 32 and the outer peripheral surface of the inner tube 36, and a plurality of gaps for configuring the coupling transformer 15 in each gap 37. The solenoid core 15a is accommodated. The plurality of solenoid cores 15a are rod-like magnetic bodies that are long in the axial direction of the cylindrical portion 32, but have different shapes depending on the shape of the gap 37 in which each is accommodated.

  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 main body 30, and the intubation 36 of the cylindrical portion 32. It is provided in the aspect which penetrates. One AC line 11 that passes through the inner intubation 36 of the tubular portion 32 is wound around the outer periphery of the tubular portion 32 and then disposed inside the electric vehicle 1. The other AC line 12 and the grounding wiring 14 are arranged inside the electric vehicle 1 without being wound around the cylindrical portion 32. The cylindrical portion 32 is provided with a signal wiring 13 wound around the power line communication unit 22 of the body ECU 2.

  By winding the AC line 11 and the signal line 13 around the cylindrical portion 32 in which the solenoid core 15a is accommodated, the AC line 11 and the signal line 13 are wound around the plurality of solenoid cores 15a. Therefore, the AC wire 11 wound around the cylindrical portion 32 becomes a primary coil, and the signal wiring 13 wound around the cylindrical portion 32 becomes a secondary coil, and the solenoid core 15a and the AC wire 11 are connected to the connector device 3. And the coupling transformer 15 by the signal line 13 is implement | achieved.

  The AC lines 11 and 12 and the ground wiring 14 are obtained by covering conductive wires with an insulator. One AC wire 11 is connected to the portion of the coil 17a in the portion of the conductive wire exposed by removing a part of the insulator at an appropriate position from the portion wound around the cylindrical portion 32 to the charger 4. 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.

  The power line communication apparatus having the above configuration includes the coupling transformer 15 necessary for the power line communication in the connector device 3, and the power line communication unit 22 that inputs and outputs a signal to the coupling transformer 15 and performs processing related to the power line communication. 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 includes a plurality of rod-shaped solenoid cores 15a accommodated in the cylindrical portion 32 of the connector device 3, and the AC wire 11 and the signal wiring 13 are wound around the cylindrical portion 32, thereby coupling the coupling transformer 15. Compared to a conventional connector device that does not have the transformer 15, the connector device 3 can be provided with the coupling transformer 15 while minimizing the size of the device. Further, since a plurality of solenoid cores 15a can be accommodated in the cylindrical portion 32, it is possible to improve communication accuracy of power line communication using the coupling transformer 15 having the solenoid core 15a.

  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 17 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.

(Modification 1)
FIG. 9 is a schematic diagram for explaining a configuration of a power line communication system according to the first modification. In the power line communication system according to the first modification, a varistor 18 is connected between two AC lines 11 and 12 of an electric vehicle, and a fuse 19 is provided in one AC line 12. The connection position of the varistor 18 is a position between the coupling transformer 15 of the AC line 11 and the connection terminal to which the charging cable is connected. The fuse 19 is disposed on the AC line 12 from the connection terminal to which the charging cable is connected to the connection position of the varistor 18.

  The varistor 18 is a resistive element that has a high resistance value when the voltage between the terminals is low and a low resistance value when a high voltage is applied between the terminals. By bypassing the AC wires 11 and 12 when a high voltage is applied, the high voltage is prevented from being applied to a charger or the like provided in the back of the electric vehicle.

  The fuse 19 is an element that cuts off a current path by fusing when a large current of a low current or higher flows. When a large current flows into the AC line 12 from the outside due to the influence of a surge or the like, the fuse 19 blocks the AC line 12, thereby preventing a large current from flowing into the charger at the back.

(Modification 2)
FIG. 10 is a schematic diagram for explaining a configuration of a power line communication system according to the second modification. In the power line communication system according to the modified example 2, as with the power line communication system according to the modified example 1, a varistor 18 is connected between the two AC lines 11 and 12 of the electric vehicle, and A fuse 19 is provided. However, in the power line communication system according to the second modification, the connection position of the varistor 18 is a position between the coupling transformer 15 of the AC line 11 and the capacitor 16 forming the filter circuit. The fuse 19 is disposed on the AC line 12 from the connection terminal to which the charging cable is connected to the connection position of the varistor 18. The roles of the varistor 18 and the fuse 19 are the same as those of the power line communication system according to the first modification.

  In the connector device 3 according to the first and second modifications having the above-described configuration, the varistor 18 is connected between the AC wires 11 and 12 and the fuse 19 is disposed in the AC wire 12. Even when a lightning strike or the like occurs during charging of the vehicle 1 and a surge voltage or current enters, it is possible to prevent the devices in the electric vehicle 1 such as the charger 4 from being destroyed by these.

  The embodiment described in detail above is only a part of the embodiment of the present invention, and the present invention can be developed in various forms. For example, in the above embodiment, the coupling transformer is connected to one of the two internal wirings (AC lines) for supplying power to the charger in the vehicle. However, the present invention is not limited to this. is not. That is, it is possible to develop in various forms such as providing a coupling transformer in each of the internal wirings and connecting the primary side to the internal wiring in each coupling transformer.

  In these various forms, there are cases where various advantages can be expected in addition to the main effects of the present invention described above. For example, by providing an electromagnetic induction type signal converter for power line communication in the connector device, the connector device blocks noise such as electromagnetic waves radiated from other electronic devices located inside and outside the vehicle, and charging. The influence on the signal superimposed on the cable can be reduced. Moreover, since the electromagnetic wave radiated | emitted from a signal converter can be interrupted | blocked with a connector apparatus, the 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.

1 Electric Vehicle 2 Body ECU (Power Line Communication Device)
3 Connector device 11 AC line (One internal wiring for power supply)
12 AC line (internal wiring for power supply)
13 Signal wiring 14 Grounding wiring (internal wiring)
15 Coupling transformer (electromagnetic induction type signal converter)
15a Solenoid core (magnetic material)
16 Capacitor (filter circuit)
17 Filter circuit 17a Coil (electronic component)
17b Capacitor (electronic component)
17c Wiring 18 Varistor (protective element)
19 Fuse 21 Control Unit 22 Power Line Communication Unit 30 Connector Body (Connector)
31 mounting portion 32 cylindrical portion 33 mounting hole 36 intubation 37 gap 51, 52 AC line 55 coupling transformer (electromagnetic induction type signal converter)
55a Solenoid core 56 Capacitor (filter circuit)
71, 72 AC line (power supply wiring)

Claims (8)

In a connector device comprising a plurality of connection terminals, a connector that accommodates the plurality of connection terminals, and a plurality of internal wires connected to the connection terminals, including two internal wires for power supply,
A cylindrical portion provided in the connector, through which the plurality of internal wirings are inserted;
One or more magnetic bodies arranged in the cylindrical portion;
A signal wiring wound around the outer periphery of the cylindrical portion,
One power supply internal wiring is wound around the cylindrical portion,
An electromagnetic induction type signal converter for power line communication is constituted by the magnetic body, the one internal wiring for power supply, and the signal wiring. The connector device according to claim 1, further comprising a filter circuit connected between the two internal wires for power supply. The filter circuit is composed of a plurality of electronic components,
The connector device according to claim 2, wherein the plurality of electronic components are connected by wiring provided along the internal wiring for power supply. The connector device according to any one of claims 1 to 3, further comprising a protection element for surge protection connected between the two internal wires for power supply. The connector device according to any one of claims 1 to 4, further comprising a fuse provided in the internal wiring for power supply. A connector device according to any one of claims 1 to 5,
A power line communication device comprising: a power line communication unit that performs power line communication using a signal converter configured by the magnetic body of the connector device, the one internal wiring for power supply, and the signal wiring. 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 is:
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 or both of the power supply internal wires And an electromagnetic induction type signal converter having a secondary coil electromagnetically coupled to the primary coil.
The power feeding device includes two or more power supply internal wirings connected to the power supply wiring of the charging cable, a filter circuit connected between the two power supply internal wirings, and one or both of them. An electromagnetic induction type signal converter having a primary coil provided in the internal wiring for power supply and a secondary coil electromagnetically coupled to the primary coil;
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. The power line communication device has a connector device mounted on the vehicle and connected to the charging cable,
The connector device includes:
A plurality of connection terminals for connection with the charging cable;
A connector main body that accommodates the plurality of connection terminals;
A plurality of internal wirings including the two power supply internal wirings and connected to the connection terminals;
A cylindrical portion provided in the connector body, through which the plurality of internal wirings are inserted;
Having one or more magnetic bodies arranged in the cylindrical portion, and a signal wiring wound around the outer periphery of the cylindrical portion;
One or both of the internal wirings for power supply are wound around the cylindrical part,
8. The power line communication according to claim 7, wherein the magnetic body, the one or both of the power supply internal wiring and the signal wiring constitute an electromagnetic induction type signal converter of the power line communication device. 9. system.

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