WO2014097697A1

WO2014097697A1 - Relay device, connector device, charging cable, and power supply system

Info

Publication number: WO2014097697A1
Application number: PCT/JP2013/075489
Authority: WO
Inventors: 陽介高田; 卓司神頭
Original assignee: 住友電気工業株式会社; 住友電装株式会社; 株式会社オートネットワーク技術研究所
Priority date: 2012-12-20
Filing date: 2013-09-20
Publication date: 2014-06-26
Also published as: JP2014124034A; JP5942838B2

Abstract

Provided is a relay device that allows a charging station having a different specification to perform battery charging at low cost by relaying a charging control signal between a vehicle and the charging station both having different DC charging specifications. A relay device (5) relays a charging control signal between a vehicle (4) mounted with a battery (41) and a charging station (1) for charging the battery (41) by supplying direct current through a charging cable (2). The relay device (5) comprises: an analog control communication unit (32b) for transmitting and receiving an analog control signal to and from the vehicle (4); a CAN communication unit (32c) for, according to the CAN communication protocol, transmitting and receiving a control signal to and from the vehicle (4); a pilot signal communication unit (32d) for transmitting and receiving a square wave pilot signal to and from the charging station (1); an in-band communication unit (33) for transmitting and receiving a control signal superimposed on the pilot signal; and a control unit (32a) for controlling the operations of the respective communication units.

Description

Relay machine, connector device, charging cable and power supply system

The present invention relates to a relay device that relays a control signal related to battery charging between a vehicle and a charging stand, a connector device including the relay device, a charging cable, and a power feeding system.

In recent years, hybrid vehicles (HEV: Hybrid Electric Vehicle) and plug-in hybrid vehicles (PHEV: Plug-in Hybrid Electric Vehicle) using both a motor and an engine have become widespread in order to raise environmental awareness and combat global warming. In addition, an electric vehicle (EV: electric vehicle) that does not include an engine and is driven by an electric motor has become widespread.

There are AC charging and DC charging as battery charging methods for driving the motor. As a method of DC charging, there are a CHAdeMO standard and a Combo method. The charging stand compliant with the CHAdeMO standard has a DC charging connector, and communicates with the vehicle by CAN (Controller Area Network) communication. On the other hand, a charging stand compliant with the combo system has a DC charging connector and an AC charging connector, and performs communication with the vehicle by in-band communication. In-band communication is a communication method performed by superimposing a control signal having a frequency of 2 to 30 MHz on a rectangular wave control signal used for simple information communication.

JP 2011-135653 A

By the way, when both standards of DC charging are adopted, there is a problem that the automobile manufacturer has to cope with two types of DC charging standards, and the development cost increases.

The present invention has been made in view of such circumstances. By relaying a control signal related to charging between a vehicle and a charging stand having different DC charging standards, battery charging by charging stations having different standards can be realized at low cost. It is to provide a repeater to perform.
It is another object of the present invention to provide a connector device, a charging cable, and a power feeding system that include the relay device.

The relay device according to the present invention is a relay device that relays a control signal related to charging between a vehicle equipped with a battery and a charging station that charges the battery by supplying direct current through a charging cable. An analog control signal between the vehicle and a pulse signal communication unit that transmits and receives a pulse wave control signal, an in-band communication unit that transmits and receives another control signal superimposed on the pulse wave control signal, and the vehicle An analog control communication unit that transmits and receives signals, a CAN communication unit that transmits and receives control signals to and from the vehicle according to a CAN communication protocol, and a signal corresponding to the control signal received by the pulse signal communication unit and the in-band communication unit Is transmitted to the analog control communication unit and the CAN communication unit, and received by the analog control communication unit and the CAN communication unit. Characterized in that a signal corresponding and a control unit for transmitting to said pulse signal communication unit and the in-band communication unit to issue.

In the present invention, the vehicle and the charging station transmit and receive control signals using different communication methods. The relay machine relays control signals between the vehicle and the charging station, thereby enabling transmission and reception of control signals between the vehicle and the charging station. Specifically, a control signal is transmitted / received to / from a charging station using a pulse signal communication unit or an in-band communication unit, and a repeater is controlled using an analog control communication unit or a CAN communication unit to / from a vehicle. The control signal is relayed by transmitting and receiving the signal.

The repeater according to the present invention is characterized by including a power source for supplying power to each communication unit.

In the present invention, each communication unit operates with power supplied from a power source. In particular, by providing a power supply other than the charging stand and the battery, it is possible to improve the safety of power supply in the repeater.

The repeater according to the present invention includes an insulating portion that insulates an AC output portion that outputs an alternating current for charging the battery.

In the present invention, the insulating part insulates the AC output part. Therefore, it is possible to prevent an unexpected situation in which alternating current is supplied to the outside from the alternating current output unit.

The repeater according to the present invention is characterized by including a cut-off switch that cuts off power supply from the charging stand to the battery.

In the present invention, when there is an abnormality in the vehicle, the charging stand, or the relay machine, it is possible to cut off the power supply from the charging stand to the battery by the cutoff switch.

A connector device according to the present invention is a connector device that connects a vehicle equipped with a battery and a charging cable, and is characterized by including any one of the above-described relays.

In the present invention, the connector device that connects the vehicle equipped with the battery and the charging cable relays the control signal, thereby enabling transmission and reception of the control signal between the vehicle and the charging station.

The charging cable according to the present invention is a charging cable for supplying a direct current to a battery mounted on a vehicle, and includes any one of the above-described repeaters.

In the present invention, the charging cable that supplies power to the battery mounted on the vehicle relays the control signal, thereby enabling transmission and reception of the control signal between the vehicle and the charging station.

The power supply system according to the present invention includes any one of the above-described repeaters, a pulse signal communication unit that transmits / receives a pulse wave control signal to / from the repeater, and another control superimposed on the pulse wave control signal. And a charging stand having an in-band communication unit for transmitting and receiving signals.

In the present invention, the above-described function is realized by a system including a charging stand and a repeater.

The power supply system according to the present invention includes any one of the above-described repeaters, a pulse signal communication unit that transmits / receives a pulse wave control signal to / from the repeater, and another control superimposed on the pulse wave control signal. CAN which transmits and receives a control signal according to a CAN communication protocol between a charging station having an in-band communication unit for transmitting and receiving signals and an analog control communication unit for transmitting and receiving analog control signals between the relay and the relay And a vehicle having a communication unit.

In the present invention, the above-described function is realized by a system including a charging station, a vehicle, and a repeater.

According to the present invention, by relaying a control signal related to charging between a vehicle having a different DC charging standard and a charging station, battery charging by a charging station having a different standard can be realized at low cost.

1 is a block diagram illustrating a configuration example of a power feeding system according to Embodiment 1. FIG. It is the block diagram which showed the detail of the electric power feeding system. It is the circuit diagram which showed the detail of the analog control communication part. It is the circuit diagram which showed the detail of the pilot signal communication part. It is the flowchart which showed the procedure of electric power feeding control. It is the flowchart which showed the procedure of electric power feeding control. It is the flowchart which showed the procedure of electric power feeding control. It is the flowchart which showed the procedure of electric power feeding control. It is the block diagram which showed the example of 1 structure of the electric power feeding system which concerns on a modification. FIG. 6 is a block diagram illustrating a configuration example of a power feeding system according to a second embodiment.

(Embodiment 1)
FIG. 1 is a block diagram illustrating a configuration example of a power feeding system according to Embodiment 1, and FIG. 2 is a block diagram illustrating details of the power feeding system. The power supply system according to the first embodiment includes a charging stand 1 that charges a battery via a charging cable 2, a connector device 3 for connecting the charging cable 2 to a vehicle 4, and a hybrid that can be charged with external power. And a vehicle 4 such as an automobile or an electric vehicle.

<Charging stand>
The charging stand 1 includes an inverter 11 that converts alternating current supplied from the alternating current power supply 6 into direct current. The inverter 11 has an AC / DC converter 11a as shown in FIG. The AC / DC converter 11a is, for example, an insulating converter circuit that converts 200V three-phase alternating current into direct current. The AC / DC converter 11a includes a rectifier circuit that converts alternating current to direct current, an inverter circuit that converts rectified direct current to high frequency alternating current, a transformer that boosts the converted high frequency alternating current, and boosted alternating current boosted by the transformer to direct current. And a rectifier circuit for conversion.
A protection circuit 11b that protects the AC / DC converter 11a from surge voltage, overcurrent, overvoltage, and the like is provided on the upstream side of the AC / DC converter 11a.
Between the AC / DC converter 11a and the protection circuit 11b, a relay L11 that turns on / off between the AC power supply 6 and the AC / DC converter 11a is provided.

The charging stand 1 also includes a safety circuit 14 that outputs an alternating current for battery charging.

Furthermore, the charging station 1 includes a charging control unit 12 and an in-band communication unit 13 that control battery charging by transmitting and receiving control signals to and from the vehicle 4 via a relay unit 5 described later. The charging control unit 12 is a device that performs charging control with the vehicle 4 by transmitting and receiving a pilot signal related to charging of the battery 41 and a control signal superimposed on the pilot signal via the relay 5. . The charge control unit 12 includes a control unit 12a, a pilot signal communication unit (pulse signal communication unit) 12d, and a ground fault detection unit 12b.

The control unit 12a is a microcomputer having a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like that control the operation of the pilot signal communication unit 12d. The control unit 12a transmits and receives control signals using the pilot signal communication unit 12d.
The pilot signal communication unit 12 d is a circuit that transmits and receives a rectangular wave pilot signal to and from the repeater 5. The pilot signal communication unit 12d transmits and receives information related to the start and stop of charging. Details will be described later.
The in-band communication unit 13 is a circuit that transmits and receives a control signal superimposed on a pilot signal. The in-band communication unit 13 transmits and receives information related to the charging stand 1 and the battery 41, and information such as the amount of charging current. Details will be described later.

The ground fault detector 12b is a circuit that is connected to the output terminal of the AC / DC converter 11a and detects a short circuit in the charging path. When the ground fault detection unit 12b detects a short circuit in the charging path, the ground fault detection unit 12b outputs a signal notifying the short circuit to the control unit 12a.

<Charging cable>
The charging cable 2 includes two power supply lines 21, a pilot signal line 22, and a ground line 23. One end of the two power supply lines 21 is connected to the inverter 11, and the other end is connected to the DC power supply terminal of the connector device 3. One end of the pilot signal line 22 is connected to the pilot signal communication unit 12d, and the other end is connected to a pilot signal communication unit (pulse signal communication unit) 32d described later included in the connector device 3. One end of the ground line 23 is grounded on the charging stand 1 side, and the other end is connected to the ground terminal of the connector device 3.

<Connector device>
The connector device 3 can be connected to the tip of the charging cable 2. The connector device 3 is inserted into the inlet 40 of the vehicle 4 to electrically connect the charging stand 1 and the vehicle 4. The connector device 3 includes, for example, a gun grip type gripping part, an insertion guide for connecting to the inlet 40 of the vehicle 4, a latch for locking with the vehicle 4, and the like. The connecting portion of the connector device 3 is shaped to be connectable to the inlet 40 of the vehicle 4. The connecting portion with the inlet 40 has a control signal terminal for inputting / outputting analog control signals and a control signal in accordance with the CAN communication protocol. A CAN communication terminal for input, a DC power supply terminal for outputting DC pressure supplied from the charging stand 1, a ground terminal, and the like are provided. The connector device 3 also includes a repeater 5 that relays a control signal related to charging between the vehicle 4 and the charging stand 1. Details of the repeater 5 will be described later. The relay machine 5 may be fixedly provided on the connector device 3 or may be provided detachably. For example, when the connection part of the connector attached as standard to the charging cable 2 is not compatible with the inlet 40 of the vehicle 4 and cannot be fitted, the relay machine 5 is fitted to the connection part of the connector device 3. It is good to comprise as a compatible adapter provided with the 1st connection part to perform and the 2nd connection part fitted to the inlet 40 of the vehicle 4. FIG. In this case, a connector device 3 is formed by connecting a relay device 5 as a compatible adapter to a standard connector.

<Vehicle>
The vehicle 4 includes an inlet 40 connected to the connector device 3 and a battery 41 for driving the electric vehicle. The inlet 40 has a shape that can be connected to the connector device 3, and a terminal connected to the DC power supply terminal, the control signal terminal, the CAN communication terminal, and the ground terminal of the connector device 3 is provided at the connection portion. The DC power supply terminal is connected to the battery 41 via the relay L4, and the battery 41 is charged by the direct current supplied from the charging stand 1.

In addition, the vehicle 4 includes a charge control unit 42 that controls battery charging by transmitting and receiving control signals to and from the charging station 1 via the relay 5. The charging control unit 42 performs charging control with the charging station 1 by transmitting and receiving an analog control signal related to charging of the battery 41 and a control signal according to the CAN communication protocol via the relay device 5. Device. The charging control unit 42 includes a control unit 42a, an analog control communication unit 42b, and a CAN communication unit 42c.

The control unit 42a is a microcomputer having a CPU, a ROM, a RAM, and the like that control the operation of each component of the charge control unit 42. The control unit 42a transmits and receives control signals using the analog control communication unit 42b and the CAN communication unit 42c.
The analog control communication unit 42 b is a circuit that transmits and receives analog control signals to and from the repeater 5. The analog control communication unit 42b transmits and receives information related to the start and stop of charging. Details will be described later.
The CAN communication unit 42 c is a circuit that transmits and receives control signals to and from the repeater 5 according to the CAN communication protocol. The CAN communication unit 42c transmits and receives information related to the charging station 11 and the battery 41, and information such as the amount of charging current. Details will be described later.

<Repeater>
The repeater 5 includes a charge control unit 32, an in-band communication unit 33, and a power source 34. The charging control unit 32 transmits / receives a pilot signal related to charging of the battery 41 and a control signal superimposed on the pilot signal to / from the charging stand 1, and charges the battery 41 to / from the vehicle 4. Is a device that relays a control signal by transmitting and receiving an analog control signal and a control signal according to the CAN communication protocol. The charging control unit 32 includes a control unit 32a, an analog control communication unit 32b, a CAN communication unit 32c, and a pilot signal communication unit 32d.

The control unit 32a is a microcomputer having a CPU, a ROM, a RAM, and the like that control the operation of each component of the charge control unit 32. The control unit 32a transmits and receives control signals to and from the charging station 1 using the pilot signal communication unit 32d, and transmits and receives control signals to and from the vehicle 4 using the analog control communication unit 32b and the CAN communication unit 32c. Further, the control unit 32a controls the operation of the in-band communication unit 33 to transmit / receive the control signal superimposed on the pilot signal.

The analog control communication unit 32 b is a circuit that transmits and receives analog control signals to and from the vehicle 4.
FIG. 3 is a circuit diagram showing details of the analog

control communication units

32b and 42b. The analog control line 43 has at least five

communication lines

43a, 43b, 43c, 43d, and 43e.
One end of the first communication line 43a is connected to a 12V power source on the repeater 5 side, and the other end is grounded on the vehicle 4 side. The first communication line 43a on the repeater 5 side is provided with a relay L1 for turning on and off the communication line 43a. The first communication line 43a on the vehicle 4 side is connected with a light emitting element of a resistor R1 and a photocoupler P1 in series. It is connected. Specifically, one end of the relay L1 is connected to the positive electrode of the 12V power supply, and the other end of the relay L1 is connected to one end of the resistor R1. The other end of the resistor R1 is connected to one end of a light emitting element constituting the photocoupler P1, and the other end of the light emitting element is grounded. The first analog control communication unit can turn on / off the photocoupler P1 by controlling on / off of the relay L1, and can output an analog control signal to the analog control communication unit 32b.

One end of the second communication line 43b is grounded on the repeater 5 side, and the other end is connected to the one end of the resistor R1. The second communication line 43b on the relay machine 5 side is provided with a relay L2 for turning on and off the communication line 43b. A resistor R2 and a photocoupler P2 are connected in series to the second communication line 43b on the vehicle 4 side. Specifically, one end of the relay L2 is grounded on the repeater 5 side, and the other end of the relay L2 is connected to one end of the resistor R2. One end of the light emitting element constituting the photocoupler P2 is connected to the one end of the resistor R1, and the other end of the light emitting element is connected to the other end of the resistor R2. The first analog control communication unit can turn on / off the photocoupler P2 by controlling on / off of the relay L2, and can output an analog control signal to the analog control communication unit 32b.

One end of the third communication line 43c is grounded on the repeater 5 side, and the other end is connected to the power supply potential on the vehicle 4 side. A resistor R3 and a photocoupler P3 are connected in series to the third communication line 43c on the vehicle 4 side. Specifically, one end of the light emitting element constituting the photocoupler P3 is connected to the power supply potential on the vehicle 4 side, and the other end of the light emitting element is connected to one end of the resistor R3. The other end of the resistor R3 is connected to the communication line 43c and is grounded on the repeater 5 side. If the charging cable 2 and the connector device 3 are normal, the photocoupler P3 is in an on state. It is also possible to eliminate the third communication line 43c.

One end of the fourth communication line 43d is connected to the positive electrode of the 12V power supply on the repeater 5 side, and the other end is grounded on the vehicle 4 side. A photocoupler P4 and a resistor R4 are connected in series to the fourth communication line 43d on the repeater 5 side, and a switch SW1 is provided on the fourth communication line 43d on the vehicle 4 side. Specifically, one end of the light emitting element constituting the photocoupler P4 is connected to a 12V power source, and the other end of the light emitting element is connected to one end of the resistor R4. The other end of the resistor R4 is connected to one end of the switch SW1, and the other end of the switch SW1 is grounded on the vehicle 4 side. The analog control communication unit 42b can control on / off of the photocoupler P4 by turning on / off the switch SW1, and can output an analog control signal to the analog control communication unit 32b.

The fifth communication line 43e is a ground line, one end of the communication line 43e is grounded on the repeater 5 side, and the other end of the communication line 43e is grounded on the vehicle 4 side.

The CAN communication unit 32 c is a circuit that transmits and receives control signals to and from the vehicle 4 according to the CAN communication protocol. The CAN communication unit 32c transmits and receives information related to the charging station 11 and the battery 41, and information such as the amount of charging current.

The pilot signal communication unit 32 d is a circuit that transmits and receives a rectangular wave control signal to and from the charging station 1.
FIG. 4 is a circuit diagram showing details of the pilot signal communication units 32d and 42d. The pilot signal communication unit 12d includes a CPLT (Control Pilot) output unit 12e that outputs a pilot signal and a CPLT detection unit 12f that detects a pilot signal.
The CPLT output unit 12e is a circuit that generates a rectangular wave pilot signal. The CPLT output unit 12e transmits and receives a control signal related to charging by changing the voltage level of the pilot signal. The pilot signal is transmitted to the vehicle via the pilot signal line 22. The CPLT output unit 12e includes an oscillator 12g that generates a rectangular wave signal. One end of the oscillator 12g is grounded, and the other end of the oscillator 12g is connected to one end of the resistor R5. The other end of the resistor R5 is connected to the pilot signal line 22. The other end of the resistor R5 is connected to one end of a capacitor C1, and the other end of the capacitor C1 is grounded. The operation of the oscillator 12g is controlled by the control unit 32a.
The CPLT detection unit 12f is a circuit that detects the voltage of the pilot signal line 22 and supplies the detection result to the control unit 12a.

The CPLT control unit 32e provided on the vehicle 4 side is a circuit that changes the voltage level of the CPLT signal. The CPLT control unit 32e includes a diode D1 whose anode is connected to the pilot signal line 22, and resistors R6 and R7 whose one ends are connected to the cathode of the diode D1. The other end of the resistor R6 is grounded. The other end of the resistor R7 is connected to one end of the switch SW2, and the other end of the switch SW2 is grounded. One end of the capacitor C2 is connected to one end of the anode of the diode D1, and the other end of the capacitor C2 is grounded. On / off of the switch SW2 is controlled by the control unit 42a. By controlling on / off of the switch SW2, the voltage level of the pilot signal can be changed, and a control signal related to charging can be transmitted from the power receiving stand to the repeater 5.
The CPLT detector 32f receives the pilot signal by detecting the voltage of the pilot signal line 22.

Further, the repeater 5 includes a power supply 34 that supplies power to the charging control unit 32 and the in-band communication unit 33. The power supply 34 is preferably a storage battery mounted on the relay machine 5, for example. The power source 34 may be a device that generates a constant voltage using a voltage output from a battery 41 mounted on the vehicle 4. Moreover, the apparatus which produces | generates a constant voltage using the DC voltage output from the charging stand 1 may be sufficient.

Further, the relay machine 5 includes an insulating unit 31 that insulates the AC output unit 24 corresponding to the end of the AC power supply line 21 for outputting AC from the charging stand 1. The insulating part 31 is configured by a member that can be reliably insulated without causing dielectric breakdown or the like in preparation for the case where an alternating current is supplied from the charging stand 1 to the outside via the connector device 3 in an unexpected situation. For example, the insulating part 31 is an insulating resin member that covers the AC output part 24.
More preferably, when it is detected that the connector device 3 and the inlet 40 are connected, the charging control unit 32 transmits a signal for stopping the AC output to the charging stand 1 in the charging stand 1. It is good to stop the AC output.

5 to 7 are flowcharts showing the procedure of power supply control. In the figure, thin horizontal arrows indicate transmission / reception of analog control signals, and thick horizontal arrows indicate transmission / reception of control signals according to the CAN communication protocol. Further, a horizontal broken arrow indicates transmission / reception of a pilot signal, and a dotted horizontal arrow indicates transmission / reception of a control signal by in-band communication.
When the connector device 3 is not fitted to the inlet 40 (step S11: NO), the controller 12a of the charging stand 1 does not output a 9V pilot signal to the vehicle 4, and the connector device 3 is fitted to the inlet 40. If so (step S11: YES), a 9V pilot signal is output to the vehicle 4 (step S12). It should be noted that when the charging stand side is in a power supply enabled state, a transition is made from 9V constant to 9V oscillation.
The control unit 32a of the repeater 5 detects the fitting of the connector device 3 by detecting the 9V pilot signal by the CPLT detection unit 32f (step S13). When the fitting of the connector device 3 is detected, the control unit 32a outputs a first charging start signal to the vehicle 4 (step S14). Specifically, the control unit 32a gives a control command to the analog control communication unit 32b to control the relay L1 to an on state. When the relay L1 is turned on, the photocoupler P1 is turned on.

The control unit 42a of the vehicle 4 detects a charging start operation (step S15). Specifically, the analog control communication unit 42b monitors the voltage state of the photocoupler P1, and detects that the photocoupler P1 is on by the light receiving element of the photocoupler P1. When the photocoupler P1 is turned on, the analog control communication unit 42b gives a signal indicating that a charging start operation has been performed to the control unit 42a. The control unit 32a detects the charging start operation by receiving the signal.

Next, the control unit 32a of the relay machine 5 confirms the insulation state and locks the connector device 3 (step S16). And the control part 32a outputs the confirmation result of an insulation state to the charging stand 1 in the CPLT control part 32e (step S17).

The control unit 12a of the charging stand 1 acquires the insulation state confirmation result transmitted from the vehicle 4 side by the CPLT detection unit 12f (step S18), and the insulation state confirmation result is stored in a storage unit (not shown). Remember.

Next, the control unit 42a on the vehicle 4 side starts CAN communication by the CAN communication unit 42c, and transmits a control signal indicating that communication is started to the repeater 5 (step S31). The control unit 32a of the relay machine 5 performs gateway processing (step S32), and transmits a control signal indicating that communication is started to the charging station 1. Specifically, the control unit 32a gives a control command to the in-band communication unit 33, and transmits a control signal indicating that communication is started to the charging station 1 by in-band communication. When the control unit 12a of the charging station 1 receives the control signal indicating the start of communication from the repeater 5, the control unit 12a starts the in-band communication by the in-band communication unit 13 (step S33).

When communication is established between the vehicle 4 and the charging station 1, the control unit 42a of the vehicle 4 gives a control command to the CAN communication unit 42c and causes the battery information to be transmitted to the relay device 5 by CAN communication (step S34). The control unit 32a of the relay machine 5 relays the battery information to the charging station 1 by gateway processing (step S35). That is, the control part 32a receives battery information in the CAN communication part 32c, and transmits battery information to the charging stand 1 by in-band communication by giving a control command to the in-band communication part 33. The battery information includes information such as maximum voltage, battery capacity, and maximum charging time.

The control unit 12a of the charging station 1 receives the battery information transmitted from the repeater 5 at the in-band communication unit 13 (step S36), and determines whether the charging station 1 is compatible with the battery 41 (step S36). S37). When it is determined that the battery 41 to be charged is compatible with the charging station 1, the control unit 12 a gives a control command to the in-band communication unit 13, thereby relaying charging station information regarding the charging station 1 through in-band communication. Transmit to the machine 5 (step S38). The charging station information includes information such as maximum voltage and maximum current.

The control unit 32a of the relay machine 5 relays the charging station information to the vehicle 4 by gateway processing (step S39). That is, the control unit 32a receives the charging station information at the in-band communication unit 33, and sends the charging station information to the vehicle 4 according to the CAN communication protocol by giving a control command to the CAN communication unit 32c.

The control unit 42a on the vehicle 4 side receives the charging station information at the CAN communication unit 42c (step S40), and determines whether or not the battery 41 is suitable for the charging station 1 based on the charging station information ( Step S41). If it is determined that it is compatible, the control unit 42a of the vehicle 4 outputs a charge permission signal to the charging station 1 through the analog control communication unit 42b (step S42). Specifically, the control unit 42a gives a control command to the analog control communication unit 42b and turns on the switch SW1. When the switch SW1 is turned on, the photocoupler P4 is turned on.

The control unit 32a on the relay machine 5 side detects the charge permission signal (step S43). Specifically, the analog control communication unit 32b monitors the voltage state of the photocoupler P4. When the photocoupler P4 detects that the photocoupler P4 is on by the light receiving element of the photocoupler P4, the photocoupler P4 is on. Is output to the control unit 32a. The control unit 32a detects the charge permission signal by receiving the signal. The control unit 32a that has detected the charging permission signal gives a control command to the CPLT control unit 32e, thereby notifying the charging station 1 that the preparation for charging on the vehicle 4 side has been completed by the pilot signal (step S44). Specifically, the control unit 32a lowers the pilot signal voltage from 9V to 6V by turning on the switch SW2 of the CPLT control unit 32e. The control unit 12a on the charging stand 1 side detects the notification that the preparation for charging is completed on the vehicle 4 side in the CPLT detection unit 12f (step S45). Specifically, the control unit 12a detects the preparation for charging by detecting that the pilot signal voltage has decreased to 6V by the CPLT detection unit 12f.

The control unit 12a that has detected that the preparation for charging on the vehicle 4 side has been completed transmits notification information indicating that the relay L4 of the vehicle 4 should be closed to the vehicle 4 by the in-band communication unit 13 (step S51). .

The control unit 32a on the relay machine 5 side receives the notification information at the in-band communication unit 33 (step S52). Subsequently, the control part 32a outputs a 2nd charge start signal in the analog control communication part 32b (step S53). Specifically, the analog control communication unit 32b controls the relay L2 to be on. When the relay L2 is turned on, the photocoupler P2 is turned on.

The control unit 42a of the relay machine 5 detects the second charging start signal (step S54). Specifically, the analog control communication unit 42b monitors the voltage state of the photocoupler P2, detects that the photocoupler P2 is on by the light receiving element of the photocoupler P2, and sets the photocoupler P2 to the on state. A signal indicating the presence is given to the control unit 42a. The control unit 42a detects the third charging start signal by receiving the signal. And the control part 42a closes the relay L4 by the side of the vehicle 4 (step S55).

Next, the control unit 42a transmits a charging command to the relay device 5 through the CAN communication unit 42c (step S56). The control part 32a of the relay machine 5 receives a charge command in the CAN communication part 32c (step S57). And the control part 32a transmits a charge command to the charging stand 1 in the in-band communication part 33 (step S58).

The control unit 12a of the charging station 1 receives the charging command at the in-band communication unit 13 (step S59), and operates the inverter 11 to supply power to the battery 41 (step S60).

During charging, the control unit 42a of the vehicle 4 monitors the state of the battery 41 and determines whether charging is completed (step S61). When it determines with charging not being completed (step S61: NO), the control part 42a returns a process to step S56, and continues charging.

If it is determined that charging has been completed (step S61: YES), the control unit 42a transmits a power supply stop signal requesting power supply stop to the charging station 1 by the CAN communication unit 42c (step S71). The control unit 32a of the relay machine 5 receives the power supply stop signal at the first CAN communication unit (step S72). The control unit 32a that has received the power supply stop signal transmits a power supply stop request to the repeater 5 through the pilot signal communication unit 32d (step S73). Specifically, the control unit 32a changes the voltage level of the pilot signal to 9V by turning off the switch SW2 of the CPLT control unit 32e.

The controller 12a of the charging station 1 detects a power supply stop request signal at the CPLT detector (step S74). Next, the control unit 12a stops the operation of the inverter 11 to stop power feeding (step S75).

The controller 42a of the vehicle 4 opens the relay L4 of the vehicle 4 after confirming that the power supply is stopped (step S76). And the control part 42a outputs a charge stop signal to the relay machine 5 in the analog control communication part 42b (step S77). Specifically, the control unit 42a gives the analog control communication unit 42b to turn off the switch SW1. When the switch SW1 is turned off, the photocoupler P4 is also turned off.

The control part 32a of the relay machine 5 detects a charge stop signal (step S78). Specifically, the analog control communication unit 32b monitors the voltage state of the photocoupler P4. When the photocoupler P4 detects that the photocoupler P4 is off by the light receiving element of the photocoupler P4, the photocoupler P4 is turned off. A signal indicating that the error has occurred is output to the controller 32a. The control unit 32a receives the signal to detect a charge stop signal.

The control part 32a which detected the charge stop signal performs a process required in order to complete | finish charge (step S79). For example, the control unit 32a performs processing such as turning off the relays L1 and L2.

Next, the control unit 12a of the charging stand 1 releases the locked state of the connector device 3 (step S80). And the control part 12a complete | finishes CAN communication by the in-band communication part 13 (step S81).

Next, the control unit 32a of the repeater 5 stops the CAN communication and the in-band communication by the CAN communication unit 32c and the in-band communication unit 33 (Step S82), and the control unit 42a on the vehicle 4 side performs the CAN communication by the CAN communication unit 42c. Is terminated (step S83), and the process is terminated.

In the relay device 5, the connector device 3, and the power feeding system configured as described above, charging with different standards is performed by relaying a control signal related to charging between the vehicle 4 having a different DC charging standard and the charging stand 1. Battery charging by the stand 1 can be realized at low cost.

In addition, if the user's vehicle 4 does not comply with the DC charging standard of the charging stand 1, the battery 41 cannot be charged, and there is a possibility of causing an electric shortage while searching for the charging station 1 conforming to the standard. According to the invention, such a problem can be solved.

Furthermore, since the AC output unit 24 is reliably insulated by the insulating unit 31, it is possible to prevent an unexpected situation in which an AC voltage is supplied from the AC output unit 24 to the outside.

Furthermore, by providing the power supply 34 that is a storage battery, it is possible to improve the safety of power supply in the relay machine 5. Furthermore, the safety of power supply in the relay machine 5 can be improved by providing the power supply 31 that is a storage battery. The storage battery can also be charged from an external power source. In addition to the storage battery, there are a plurality of methods such as activation by AC power supplied from commercial power or the like, and supply of power by a solar battery.

(Modification)
FIG. 9 is a block diagram illustrating a configuration example of a power feeding system according to a modification. The power supply system according to the modification includes a charging stand 1, a charging cable 2, a connector device 3, and a vehicle 4 similar to those in the first embodiment. The connector device 3 according to the modification further includes a cut-off switch 35 for turning on and off the power supply line 21 in the relay machine 105. The on / off of the cutoff switch 35 is controlled by the charge control unit 32. For example, the charging control unit 32 keeps the cutoff switch 35 in an OFF state until charging is permitted, and when the charging permission can be confirmed through communication with the charging station 1 and the vehicle 4, the cutoff switch 35 is turned on. Thus, the on / off of the cutoff switch 35 is controlled. When the charging control unit 32 receives an abnormality detection signal from the charging station 1 or the vehicle 4 or when an overcurrent, an overvoltage, a short circuit, or the like is detected by a sensor (not shown), the cutoff switch 35 is controlled to be turned on. Also good.
By providing the cut-off switch 35 in this way, the safety of the power feeding system can be improved.
Since other configurations, operations, and effects of the power feeding system are the same as those of the power feeding system described in the first embodiment, the corresponding portions are denoted by the same reference numerals and detailed description thereof is omitted.

(Embodiment 2)
FIG. 10 is a block diagram illustrating a configuration example of the power feeding system according to the second embodiment. The power feeding system according to the second embodiment includes a charging stand 1, a charging cable 202, a connector device 203, and a vehicle 4 similar to those in the first embodiment. However, the point that relay device 205 is provided in the middle of charging cable 202 instead of connector device 203 is different from the first embodiment.
Since other configurations, operations, and effects of the power feeding system are the same as those of the power feeding system described in the first embodiment, the corresponding portions are denoted by the same reference numerals and detailed description thereof is omitted.
In the first and second embodiments, the example in which the relay device 205 is provided in the connector device 203 and the charging cable 202 has been described. For example, it may be provided at a charging stand or at an inlet of a vehicle. Moreover, you may comprise as an adapter which can be attached or detached to a connector apparatus or an inlet.

The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined not by the above-described meaning but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.
Specifically, the charging start button is not arranged on the charging stand, but may be arranged. In this case, it is assumed that charging is affected such that the pilot signal does not oscillate 9V until the button is pressed.
In addition, when data such as authentication and billing is added to in-band communication, it can be processed by a repeater. For this purpose, a connector device incorporating a repeater may be provided with a function for specifying personal information such as a card reader, an electronic money settlement function, and the like.
In addition, a plurality of functions are integrated in the inverter (11) and the charging controller (12) in the charging stand, the charging controller (32) in the connector device, and the charging controller (42) in the vehicle. It may be a separate unit.

DESCRIPTION OF SYMBOLS 1 Charging stand 2 Charging cable 3 Connector apparatus 4 Vehicle 5 Relay machine 6 AC power supply 11 Inverter 11a AC / DC conversion part 11b Protection circuit 12 Charging control part 12a Control part 12b Ground fault detection part 12d Pilot signal communication part (pulse signal communication part) )
12e CPLT output unit 12f CPLT detection unit 12g oscillator 13 in-band communication unit 14 safety circuit 21 power supply line 22 pilot signal line 23 ground line 24 AC output unit 31 insulation unit 32 charge control unit 32a control unit 32b analog control communication unit 32c CAN communication 32d Pilot signal communication unit (pulse signal communication unit)
32e CPLT output unit 32f CPLT detection unit 33 in-band communication unit 34 power supply 35 cutoff switch 40 inlet 41 battery 42 charge control unit 42a control unit 42b analog control communication unit 42c CAN communication unit 43 analog control line 43a first communication line 43b second 2 communication line 43c 3rd communication line 43d 4th communication line 43e 5th communication line

Claims

In a relay that relays a control signal related to charging between a vehicle equipped with a battery and a charging station that charges the battery by supplying direct current through a charging cable,
A pulse signal communication unit for transmitting and receiving a pulse wave control signal to and from the charging station;
An in-band communication unit that transmits and receives another control signal superimposed on the control signal of the pulse wave;
An analog control communication unit that transmits and receives analog control signals to and from the vehicle;
A CAN communication unit that transmits and receives control signals to and from the vehicle according to a CAN communication protocol;
A signal corresponding to the control signal received by the pulse signal communication unit and the in-band communication unit is transmitted to the analog control communication unit and the CAN communication unit, and received by the analog control communication unit and the CAN communication unit. A relay unit comprising: a control unit that transmits a signal corresponding to a control signal to the pulse signal communication unit and the in-band communication unit.
The repeater according to claim 1, further comprising a power source that supplies power to each communication unit.
The relay unit according to claim 1, further comprising an insulating unit that insulates an AC output unit that outputs an alternating current for charging the battery.
The relay device according to any one of claims 1 to 3, further comprising a cut-off switch that cuts off power supply from the charging stand to the battery.
In a connector device that connects a vehicle equipped with a battery and a charging cable,
The connector apparatus provided with the relay machine as described in any one of Claim 1 thru | or 4.
In the charging cable that supplies direct current to the battery installed in the vehicle,
A charging cable comprising the repeater according to any one of claims 1 to 4.
A repeater according to any one of claims 1 to 4;
A charging station having a pulse signal communication unit that transmits / receives a pulse wave control signal to / from the repeater and an in-band communication unit that transmits / receives another control signal superimposed on the pulse wave control signal. Power supply system.
A repeater according to any one of claims 1 to 4;
A charging station having a pulse signal communication unit for transmitting and receiving a pulse wave control signal to and from the repeater and an in-band communication unit for transmitting and receiving another control signal superimposed on the pulse wave control signal;
A power supply comprising: an analog control communication unit that transmits and receives analog control signals to and from the repeater; and a vehicle that includes a CAN communication unit that transmits and receives control signals to and from the repeater according to a CAN communication protocol. system.