JP2013183472A - Power supply device and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device and a communication method, capable of efficient communication at power supply in communication, such as inband communication, that transmits and receives communication signals by using, as a medium, a control line that transmits a control signal used for power supply control and is enclosed in a charge cable that connects a vehicle and the power supply device.SOLUTION: A power supply device 2 includes: a plurality of control lines 32, 32 respectively connectable to different vehicles 1, 1; one communication unit 22 for transmitting and receiving communication signals in which an opposite communication party is designated; and a superposition/separation unit 23 for superposing and separating the communication signals transmitted and received at the communication unit 22 to/from the control lines 32, 32. The superposition/separation unit 23 includes: a plurality of primary coils 231a, 231b respectively placed between the plurality of branch lines 32, 32; and one secondary coil 232 electromagnetically coupled with the plurality of primary coils 231a, 231b and connected to the communication unit 22.

Description

  The present application relates to a power supply apparatus that communicates with a power supply target by transmitting and receiving a communication signal different from the control signal using a control line that transmits a control signal used for power supply control as a medium when power is supplied to the power supply target, and the power supply The present invention relates to a communication method using an apparatus.

  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. The electric vehicle charges the battery by supplying power from an external power supply device. Moreover, even if it is a hybrid vehicle, a plug-in hybrid vehicle that can charge a battery from an external power supply device has been put into practical use. The external power supply device is a power supply device installed in a facility such as a general house or a commercial power supply station. When power is supplied from the power supply device to the vehicle, the plug at the end of the charging cable connected to the power supply device is connected to a power supply port provided in the vehicle as a power receiving connector. Then, power is supplied from the power supply device to the vehicle via the power supply line included in the charging cable, and the battery is charged.

  The charging cable includes not only the power supply line but also other wiring such as a grounding line and a control line. The control line is a wiring used for transmission of a control signal such as a control pilot signal used for power supply control of the power storage device. By transmitting and receiving a control signal between the power feeding device and the vehicle via the control line, various states such as the connection state of the charging cable, the state of chargeability, the state of charge, etc. are detected, and according to the detected state Charging control is performed.

  Furthermore, when commercializing an automobile that requires power supply from the outside, such as an electric vehicle or a hybrid vehicle, information for power supply control and communication information for performing management of power supply amount or billing, etc. A communication function for transmitting and receiving data is required.

  Therefore, standardization of communication such as inband communication in which a communication signal is superimposed on a control signal and transmitted and received between the vehicle and the power feeding apparatus is being promoted (for example, see Non-Patent Document 1).

  FIG. 5 is an explanatory diagram showing a configuration example of a system that is being standardized. In FIG. 5, reference numeral 1000 denotes a vehicle, and the vehicle 1000 is connected by a charging cable 3000 when power is supplied from the power supply apparatus 2000. The charging cable 3000 includes a pair of power supply lines 3001 and 3002 used as power supply lines, a grounding line 3003 that is a conducting wire for grounding, and a control line that transmits a control signal such as a control pilot signal (CPLT) used for charging control. 3004 is included.

  One end of the charging cable 3000 is connected to the power feeding device 2000 side, and a plug 3005 provided on the other end side is connected to a power receiving connector 1001 provided as a connecting portion at a power feeding port on the vehicle 1000 side. Power supply is possible.

  The power supply apparatus 2000 is controlled so as to superimpose and separate communication signals, a power supply unit 2001 that supplies AC power, a charging control unit 2002 that performs communication related to charging control, a communication unit 2003 that transmits and receives communication signals, and the like. And a superimposing / separating unit 2004 interposed in the wire 3004.

  The superimposing / separating unit 2004 superimposes various communication signals on the control line 3004 and separates the superimposed various communication signals. The superimposing / separating device 2004 superimposes various communication signals output from the communication unit 2003, and inputs the separated various communication signals to the communication unit 2003, whereby communication of the communication unit 2003 is performed.

  The vehicle 1000 includes a power receiving connector 1001, a battery 1002, a charging device 1003 that charges the battery 1002, a charging control device 1004 that performs communication related to charging control, a communication device 1005 that transmits and receives communication signals, and a communication signal. And a superimposing / separating device 1006 interposed in the control line 3004 for superimposing and separating the above.

  The superimposing / separating device 1006 superimposes various communication signals on the control line 3004 and separates the various superimposed communication signals. The superimposing / separating device 1006 superimposes various communication signals output from the communication device 1005, and inputs the separated various communication signals to the communication device 1005, whereby communication of the communication device 1005 is performed.

"SURFACE VEHICLE RECOMMENDED PRACTICE", J1772 JAN2010, Society of Automotive Engineers, Inc., October 1996 (revised January 2010)

  However, with an increase in the number of vehicles that require charging, more efficient processing such as charging and communication during charging is required.

  The present invention has been made in view of such circumstances, and by providing a plurality of control lines that can be connected to a power supply target such as a vehicle, charging and communication for a plurality of power supply targets are performed. Therefore, it is an object of the present invention to provide a power supply apparatus and a communication method capable of improving the efficiency of processing such as charging and communication at the time of charging.

  The power supply device according to the present invention transmits and receives a communication signal different from the control signal by using a control line for transmitting a control signal used for power supply control as a medium when power is supplied to a power supply target using a power supply line. In a power supply apparatus that communicates with a target, a plurality of sets of power supply lines and control lines that can be connected to different power supply targets, a communication unit that transmits and receives a communication signal designating a communication partner, and transmission by the communication unit A superposition / separation unit that superimposes / separates the received communication signal with respect to the control line, and the superposition / separation unit includes a plurality of primary coils interposed in each of the plurality of control lines, and a plurality of primary coils. And a secondary coil that is electromagnetically coupled with the primary coil and connected to the communication unit.

  The power supply device according to the present invention is connected to each of the plurality of control lines and is interposed in each of the plurality of charge control units that transmit / receive control signals, and each of the plurality of control lines. It further comprises a blocking unit that is positioned between the superposition / separation units and blocks a band signal used for the communication signal.

  In the communication method according to the present invention, a power feeding device and a vehicle including a power storage device fed from the power feeding device are connected by a power feeding line used for power feeding and a control line for transmitting a control signal used for power feeding control. In the communication method of transmitting and receiving a communication signal different from the control signal using the control line as a medium, the power supply device is the power supply device according to the present invention, and the vehicle is a communication designated by itself. It communicates with the said electric power feeder based on a signal, It is characterized by the above-mentioned.

  In the present invention, during power feeding, it is possible to simultaneously perform communication using a control line as a medium for a plurality of power feeding targets.

  In the power feeding device and the communication method according to the present invention, a plurality of wirings such as control lines can be provided, and communication with a plurality of power feeding targets using the control line as a medium can be performed simultaneously. There are excellent effects such as efficient processing of power supply to the power supply target and communication during power supply.

It is explanatory drawing which shows the structural example regarding the electric power feeder which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structural example regarding the electric power feeder which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structural example regarding the electric power feeder which concerns on Embodiment 2 of this invention. It is a circuit diagram which shows the structural example of the low pass filter used with the electric power feeder which concerns on Embodiment 2 of this invention. It is explanatory drawing which shows the structural example of the system in which standardization is advanced.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

Embodiment 1 FIG.
FIG. 1 is an explanatory diagram illustrating a configuration example related to the power feeding device according to the first embodiment of the present invention. FIG. 1 shows an example in which the power supply device according to the present invention is applied to a mode in which a battery (power storage device) 10 provided in a vehicle 1 such as an electric vehicle or a plug-in hybrid vehicle is supplied from a power supply device 2 such as a charging stand. Show. In FIG. 1, a mode in which power is supplied to two vehicles 1, 1 is illustrated, but the present invention may be applied to a mode in which power is supplied to three or more vehicles 1, 1,. In the following description, for convenience of description, the two vehicles 1 and 1 are distinguished as a first vehicle 1a and a second vehicle 1b as necessary. The same distinction is made for the charging cable described later.

  The vehicle 1 and the power supply device 2 can be connected by a charging cable 3. The charging cable 3 includes a pair of power supply lines 31 used as power supply lines and a control line 32 for transmitting a control signal such as a control pilot signal (CPLT) used for charge control. Note that the charging cable 3 includes not only the pair of power supply lines 31 and the control line 32 but also other wiring such as a grounding line to be described later.

  One end of the charging cable 3 is connected to the power feeding device 2 side, and the plug 30 provided on the other end side is connected to the power receiving connector 11 arranged as an in-vehicle power feeding port serving as a connection part on the vehicle 1 side. be able to. By connecting the plug 30 at the other end of the charging cable 3 to the power receiving connector 11, the configuration illustrated in FIG. 1 is obtained, and power feeding from the power feeding device 2 to the vehicle 1 becomes possible.

  In FIG. 1, the power supply device 2 is connected to the first vehicle 1a and the second vehicle 1b using two charging cables 3a and 3b. The first charging cable 3a connected to the first vehicle 1a includes wires such as a first pair of power supply lines 31a and a first control line 32a, and includes a first plug 30a. The second charging cable 3b connected to the second vehicle 1b includes wiring such as a second pair of power supply lines 31b and a second control line 32b, and includes a second plug 30b. Yes.

  The pair of power supply lines 31 are AC lines (AC_L, AC_N) to which an AC voltage is applied. The control line 32 is a signal line for transmitting / receiving a control signal such as a control pilot signal. Control for charging the battery 10 of the vehicle 1 is performed based on a control pilot signal transmitted and received when the power feeding device 2 and the vehicle 1 are connected. The control line 32 can also be used as a medium for transmitting information for performing management such as vehicle authentication, charging management, charging management, and other various information. That is, the vehicle 1 and the power feeding device 2 can perform communication by superimposing and separating the communication signal on the control line 32. Moreover, the power supply device 2 of the present invention can supply power to the first vehicle 1a and the second vehicle 1b at the same time, and communicates simultaneously with the first vehicle 1a and the second vehicle 1b during power supply. Is possible.

  The power supply device 2 includes a first power supply unit 20a that supplies AC power, and a first charge control unit 21a that is used for charge control, with the first vehicle 1a connected by the first charging cable 3a as a power supply target. I have. In addition, the power feeding device 2 uses the second vehicle 1b connected by the second charging cable 3b as a power feeding target, a second power supply unit 20b that supplies AC power, and a second charging control unit 21b that is used for charging control. And. Furthermore, the power supply apparatus 2 includes a single communication unit 22 that transmits and receives communication signals using the first control line 32a and the second control line 32b as media.

  One end of a first power supply line 31a is connected to the first power supply unit 20a, and one end of a first control line 32a is connected to the first charge control unit 21a. In addition, one end of a second power supply line 31b is connected to the second power supply unit 20b, and one end of a second control line 32b is connected to the second charge control unit 21b. The wiring in the power supply device 2 is an internal conductor that functions as an extension line connected to the power supply wires 31a and 31b included in the charging cables 3a and 3b outside the power supply device 2 and the control wires 32a and 32b. However, in the following description, for the sake of convenience, the power supply lines 31a and 31b and the control lines 32a and 32b will be described including the extended line portion disposed as the internal conductor.

  The first charge control unit 21a and the second charge control unit 21b are, for example, output-side circuits compliant with international standards related to charge control. By transmitting and receiving control signals such as control pilot signals, connection confirmation and start of energization are performed. The charging control is performed in various states.

  In addition to the battery 10 and the power receiving connector 11, the vehicle 1 includes a charging device 12 that charges the battery 10, a charging control device 13 that performs communication related to charging control, and a communication device 14 that transmits and receives communication signals. Yes.

  In the power receiving connector 11, internal wiring (not shown) connected to the pair of power supply lines 31 and the control line 32 is provided. The other end of the internal wiring connected to the power supply line 31 is connected to the charging device 12 via an AC line disposed inside the vehicle 1, and the battery 10 is charged by the charging device 12. The other end of the internal wiring connected to the control line 32 is connected to the charging control device 13 via an extension line disposed as an internal wiring in the vehicle 1. In the following description, for convenience, the internal wiring, the AC line, and the extension line will be described as the power supply line 31 and the control line 32.

  Further, the communication device 14 is connected to the control lines 32a and 32b in a form to be described later.

  The charge control device 13 is, for example, an input-side circuit that conforms to an international standard related to charge control, and is controlled when communication with the first charge control unit 21a or the second charge control unit 21b of the power supply device 2 becomes possible. By transmitting and receiving control signals such as pilot signals, charging control in various states such as connection confirmation and communication start is performed.

  FIG. 2 is a block diagram showing a configuration example relating to the power feeding device 2 according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing in more detail the configuration of a circuit and the like related to communication by transmission / reception of communication signals in the configuration example shown in FIG.

  The charging cable 3 includes not only a wiring such as a control line 32 but also a ground line 33, and the control line 32 and the ground line 33 are used for communication by transmission and reception of communication signals. Note that the first charging cable 3a includes the first grounding wire 33a and the second charging cable 3b includes the second grounding wire 33b as necessary. The internal wiring connected to the grounding wire 33 in the power feeding device 2 and the vehicle 1 will also be described as grounding wires 33 (33a, 33b).

  In the power feeding device 2, the first control line 32a is connected to the first charge control unit 21a, and the second control line 32b is connected to the second charge control unit 21b. The first charge control unit 21a includes various elements such as a capacitor and a resistor, and various circuits such as an oscillation circuit. Parameters of various elements such as a capacitor and a resistor are appropriately designed in consideration of a band related to a control signal to be transmitted / received. For example, when a control pilot signal using a rectangular wave of 1 kHz is used as a control signal, a 2.2 nF capacitor and a 1.0 kΩ resistor are used. The same applies to the second charge control unit 21b.

  In the power feeding apparatus 2, the communication unit 22 is connected to the first control line 32a and the second control line 32b via a superposition / separation unit 23 that superimposes / separates communication signals.

  The superposition / separation unit 23 includes a first transformer 231a and a second primary coil 231b, and a coupling transformer (one secondary coil 232 that is electromagnetically coupled to the first primary coil 231a and the second primary coil 231b). Electromagnetic induction type signal converter).

  Both ends of the first primary coil 231a included in the superposition / separation unit 23 are connected to the first control line 32a, and are wired so that the first primary coil 231a is interposed in the first control line 32a. ing. Both ends of the second primary coil 231b are connected to the second control line 32b, and are wired so that the second primary coil 231b is interposed in the second control line 32b. Further, both ends of the secondary coil 232 included in the superposition / separation unit 23 are connected to the communication unit 22.

  The superposition / separation unit 23 configured as described above superimposes and separates the communication signal input / output from the communication unit 22 on the first control line 32a and the second control line 32b, thereby the communication unit 22. The communication signal is transmitted and received by. That is, the communication signal output from the communication unit 22 is input to the superposition / separation unit 23 and applied to the secondary coil 232. A communication signal generated in the first primary coil 231a is superimposed on the first control line 32a by electromagnetic induction generated when the communication signal is applied to the secondary coil 232. Then, a communication signal is transmitted to the first vehicle 1a using the first control line 32a as a medium. Further, the communication signal generated in the second primary coil 231b is superimposed on the second control line 32b by electromagnetic induction generated when the communication signal is applied to the secondary coil 232. Then, a communication signal is transmitted to the second vehicle 1b using the second control line 32b as a medium.

  Further, the secondary coil is generated by electromagnetic induction generated when a communication signal transmitted using the first control line 32a as a medium is applied to the first primary coil 231a interposed in the first control line 32a. 232 generates a communication signal. A communication signal generated in the secondary coil 232 is output from the superposition / separation unit 23 and input to the communication unit 22. A communication signal transmitted using the second control line 32b as a medium is applied to the second primary coil 231b interposed in the second control line 32b, thereby causing the secondary coil 232 to undergo electromagnetic induction. Generate a communication signal. A communication signal generated in the secondary coil 232 is output from the superposition / separation unit 23 and input to the communication unit 22.

  As described above, the superimposing / separating unit 23 superimposes the various communication signals output from the communication unit 22 on the first control line 32a and the second control line 32b, and the first control line 32a or Communication of the communication unit 22 is performed by inputting various communication signals separated from the second control line 32 b to the communication unit 22. That is, in the power feeding device 2 of the present invention, one communication unit 22 superimposes and separates communication signals on the plurality of control lines 32 and 32 via the superposition / separation unit 23, thereby separating the control line. Communication is performed using 32 and 32 as media.

  In the vehicle 1, the charging control device 13 is connected to the control line 32. Further, the charging control device 13 is connected to the ground line 33 through a vehicle body ground (body earth) or directly. The charging control device 13 includes various elements such as a capacitor, a resistor, and a diode. Parameters of various elements such as a capacitor and a resistor are appropriately designed in consideration of a band related to a control signal to be transmitted / received. For example, when a control pilot signal using a rectangular wave of 1 kHz is used as a control signal, a 1.8 nF capacitor and a 2.74 kΩ resistor are used.

  In the vehicle 1, the communication device 14 is connected to the control line 32 via the superposition separator 15. The superimposition separator 15 is a circuit such as a coupling transformer including a primary coil connected to the control line 32 and a secondary coil electromagnetically coupled to the primary coil.

  Both ends of the primary coil included in the superposition separator 15 are connected to the control line 32, and are wired so that the primary coil is interposed in the control line 32. The secondary coil included in the superposition separator 15 is connected to the communication device 14.

  The superposition separator 15 configured as described above superimposes various communication signals on the control line 32 and separates the various communication signals superimposed. The superimposing / separating device 15 superimposes various communication signals output from the communication device 14 and inputs the separated various communication signals to the communication device 14 so that the communication device 14 communicates.

  That is, a loop circuit for transmitting a communication signal is formed by the superimposing / separating device 15, the control line 32, the ground line 33, the superimposing / separating unit 23 and other wirings, elements, and circuits. Thereby, the inband communication which superimposes a communication signal by using the control line 32 as a medium between the communication device 14 in the vehicle 1 and the communication unit 22 of the power feeding device 2 can be realized.

  The communication signal is transmitted and received as a packet for each predetermined data length. A packet to be transmitted / received has a header portion and a data portion, and various information such as identification information indicating a transmission destination and identification information indicating a transmission source is shown in the header portion. As such identification information, for example, information such as a MAC address for identifying a device related to communication is used. That is, the communication unit 22 of the power supply device 2 can transmit and receive a communication signal specifying a communication partner by using the MAC address of the communication device 14 included in the vehicle 1 as identification information indicating a transmission destination.

  The vehicle 1 determines whether the communication device 14 is a communication signal addressed to the own device based on identification information such as a MAC address specified as a communication partner in the packet related to the received communication signal. When it is determined that the communication signal is addressed to the own apparatus, processing based on the communication signal related to the packet is performed. When it is determined that the communication signal is not addressed to the own apparatus, the packet is discarded. That is, the vehicle 1 communicates with the communication unit 22 included in the power supply device 2 based on the communication signal that designates the vehicle 1 by the communication device 14.

  As described above, the power feeding device 2 according to the present invention communicates simultaneously with a plurality of vehicles 1 and 1 by performing communication by transmission and reception of communication signals based on identification information indicated in the packets related to communication signals. It can be performed. And since the electric power feeder 2 which concerns on this invention can perform electric power feeding, electric power feeding control, and communication with respect to the several vehicles 1 and 1 simultaneously, it can improve processes, such as electric power feeding.

Embodiment 2. FIG.
The second embodiment is a form in which a low-pass filter is provided on the control line in the first embodiment. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the first embodiment is referred to and detailed description thereof is omitted.

  FIG. 3 is a block diagram illustrating a configuration example relating to the power feeding device 2 according to Embodiment 2 of the present invention. A low-pass filter 24 a is interposed between the first charging control unit 21 a and the superposition / separation unit 23 in the first control line 32 a in the power supply device 2 according to the second embodiment. The low-pass filter 24a and the superimposing / separating unit 23 are connected to the ground (GND) side of the first charging control unit 21a via a capacitor 25a. The same applies to the second control line 32b, in which a low-pass filter 24b and a capacitor 25b are arranged. Further, a low-pass filter 16 is interposed between the charging control device 13 and the superposition separator 15 in the control line 32 in the vehicle 1. Further, the low-pass filter 16 and the superposition separator 15 are connected to the ground side of the charging control device 13 via a capacitor 17.

  The low-pass filters 24a, 24b, and 16 function as a high-frequency cutoff unit that cuts off a high-frequency band signal used for a communication signal, and allows a low-frequency band signal used for a control signal to pass therethrough. Since the communication signal passes through the capacitors 25a, 25b, and 17, the superimposing separator 15, the control line 32, the ground line 33, the superimposing / separating unit 23, the capacitors 25a (25b) and 17, and other wirings, elements, A loop circuit for transmitting a communication signal is formed by the circuit. Thereby, the inband communication which superimposes a communication signal by using the control line 32 as a medium between the communication device 14 in the vehicle 1 and the communication unit 22 of the power feeding device 2 can be realized.

  FIG. 4 is a circuit diagram showing a configuration example of the low-pass filters 24a and 24b used in the power feeding device 2 according to Embodiment 2 of the present invention. As shown in FIG. 4, the low-pass filters (LPF) 24a and 24b are configured as, for example, a circuit in which a coil having an inductance of 1.5 mH and a resistance of 1.0 kΩ are arranged in parallel, or an equivalent circuit thereof. Note that another circuit may be used as long as similar characteristics can be obtained. The low-pass filter 16 used in the vehicle 1 is also configured as a similar circuit or an equivalent circuit thereof.

  As shown in the second embodiment, by providing a high-frequency cutoff unit such as the low-pass filters 24a and 24b in the power feeding device 2, it is possible to prevent malfunction caused by a communication signal leaking to the charge control unit side. .

  The first and second embodiments only disclose a part of the myriad examples of the present invention, and can be appropriately designed in consideration of various factors such as purpose, application, and specifications. .

  For example, in the above-described embodiment, an embodiment has been described in which one communication unit can communicate with two vehicles simultaneously. However, the present invention is not limited to this, and communication with three or more vehicles is performed. May be. Furthermore, by providing a plurality of communication units that can communicate simultaneously with two vehicles, the number of vehicles that can further communicate may be increased.

  In addition, it is possible to design appropriately such as integrating the communication unit and the superposition / separation unit. Furthermore, it is possible to develop a configuration in which the power supply device supplies power to and communicates with a power supply target other than the vehicle.

  Further, in the first and second embodiments, the power supply apparatus including the superposition / separation unit having the primary coil interposed in the control line has been described. However, the present invention is not limited to this. That is, the superposition / separation unit may be replaced with a superposition / separation unit having a primary coil interposed in the ground line, or a superposition / separation unit having a primary coil interposed in the ground line may be added. It is possible to design appropriately.

1, 1a, 1b Vehicle 10 Battery (power storage device)
DESCRIPTION OF SYMBOLS 11 Power receiving connector 12 Charging apparatus 13 Charging control apparatus 14 Communication apparatus 15 Superimposition separator 16 Low pass filter 17 Capacitor 2 Power feeding apparatus 20a 1st power supply part 20b 2nd power supply part 21a 1st charge control part 21b 2nd charge control part 22 Communication unit 23 Superposition / separation unit 231a First primary coil 231b Second primary coil 232 Secondary coil 24a, 24b Low pass filter 25a, 25b Capacitor 3, 3a, 3b Charging cable 30, 30a, 30b Plug 31, 31a, 31b Feed line 32 , 32a, 32b Control line 33, 33a, 33b Ground line

Claims (3)

In power supply using the power supply line for the power supply target, using a control line for transmitting a control signal used for power supply control as a medium, by transmitting and receiving a communication signal different from the control signal, in the power supply apparatus communicating with the power supply target,
A plurality of sets of power supply lines and control lines that can be connected to different power supply targets,
A communication unit for transmitting and receiving a communication signal designating a communication partner;
A superposition / separation unit that superimposes / separates a communication signal transmitted / received by the communication unit with respect to the control line;
The overlapping separation unit is
A plurality of primary coils interposed in each of a plurality of control wires;
A power supply apparatus comprising: a secondary coil that is electromagnetically coupled to a plurality of primary coils and connected to the communication unit. A plurality of charge controllers connected to the plurality of control lines, respectively, for transmitting / receiving control signals;
And a blocking unit that is interposed between each of the plurality of control lines and is positioned between the charging control unit and the superimposing / separating unit, and that blocks a signal in a band used for the communication signal. The power feeding device according to 1. A power supply device and a vehicle including a power storage device fed from the power supply device are connected by a power supply line used for power supply and a control line used to transmit a control signal used for power supply control, and the control line is used as a medium. In a communication method for transmitting and receiving a communication signal different from the control signal,
The power supply device is the power supply device according to claim 1,
The vehicle communicates with the power feeding device based on a communication signal designating the vehicle.

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