JP2015089155A - Non-contact charging system and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact charging system enabling a vehicle to perform charge control of a charge station according to the performance and characteristic of the charge station.SOLUTION: A power supply control device 11 reads out control information on a power supply 4 from an internal nonvolatile memory 21. The control information includes maximum supply power, a step power value and a step time of power of a charge station 2 for each charge station 2. A charger control device 18 generates a charge control pattern on the basis of the received control information. The charger control device 18 transmits a power supply request instruction on the basis of the step power value of the power of each step in the charge control pattern. The power supply control device 11 which has received a power supply request notification confirms that the control information is coincident with the power output request value of power supply, to perform non-contact charging if both are coincident.

Description

  The present invention relates to a contactless charging system and a vehicle for a battery-equipped vehicle.

  An electric vehicle (EV vehicle) that travels by an electric motor and a plug-in hybrid vehicle (PHV vehicle) that travels by using an electric motor and a gasoline engine in combination have become widespread. These EV cars and PHV cars are equipped with a battery, and the vehicle is driven by driving a motor with electric energy stored in the battery.

  Currently, as a charging system for EV cars and PHV cars, there is generally used a charging stand installed in each of a plurality of parking spaces provided in a parking area, and charging is performed while the vehicle is parked in the parking space. Is. In addition, as a method of supplying power from the charging stand to the vehicle, a contact charging system that connects the charging stand and the vehicle with a dedicated charging cable, and electromagnetic induction or the like while maintaining the charging stand and the vehicle in a non-contact state. There is a non-contact charging system that uses the principle to supply power.

  In the non-contact charging system, there is a case where the maximum supply power differs depending on the performance of the charging station used, and in order to supply the maximum supply power, the power may need to be changed stepwise with time. For this reason, when it is going to control the electric power feeding amount of a charging stand from a vehicle, the control information for controlling a charging stand appropriately is required.

  Patent Document 1 describes a non-contact charging system in which non-contact charging is performed between a vehicle and a power supply device provided on a road surface or the like. In this non-contact charging system, a transceiver that exchanges charging control information by non-contact communication is provided between the vehicle and the power supply device, and information on the traveling road surface of the vehicle is transmitted from the transmitter on the power supply device side to the vehicle. The vehicle side creates power transmission amount control information based on the information, and transmits the control information from the vehicle side transceiver to the power supply device side control device to be supplied to the vehicle. The charging power is controlled and efficient power transmission / reception is performed.

JP 2006-174676 A

  However, the control method described in Patent Document 1 improves the efficiency of power transmission / reception between the power supply device provided on the road surface and the vehicle and the vehicle, and charging is performed depending on the performance and characteristics of each charging stand (power supply device). There was a problem that it was not suitable for the purpose of appropriately controlling the stand. In addition, since the vehicle cannot perform control in accordance with the performance and characteristics of the charging station, the degree of freedom in designing the charging station is reduced, and there is a problem in that a charging station with good performance cannot be designed.

  The present invention has been made to solve such problems, and an object thereof is to provide a non-contact charging system in which a vehicle can control charging of a charging station in accordance with the performance and characteristics of the charging station. .

A contactless charging system according to the present invention is a contactless charging system that performs contactless charging, which includes a charging device mounted on a vehicle and a charging stand, and the charging stand supplies power to the charging device. Power supply device, a power supply device communication unit provided in the power supply device for performing communication, and a power supply coil provided in the power supply device and configured to supply power for charging in a contactless manner. The charging device includes a charging device communication unit for performing communication and a power receiving coil for receiving charging power in a contactless manner, and the communication is performed by the charging device and the power feeding device. The power supply device transmits control information to the charging device, and the charging device generates a charge control pattern for controlling the output power of the power supply device based on the control information, and performs charge control. Based on pattern Non-contact charging system by transmitting, the charging apparatus to carry out the charge control on the power supply device power feed request to the power supply apparatus Te.
The charge control pattern may include at least one of a power step power value of a power step that changes the magnitude of the power supply power and a power step time of a power step that changes the magnitude of the power supply power.
The power supply device communication unit is a power supply device wireless communication unit for performing wireless communication, and the charging device communication unit is a charging device wireless communication unit for performing wireless communication, and wireless communication is performed between the charging device and the power supply device. May be possible.

  A vehicle according to the present invention includes a power supply device that supplies power to a charging device, a power supply device communication unit that is provided in the power supply device and performs communication, and is provided in the power supply device and supplies power for charging without contact. The charging device includes a charging device that is charged by a charging stand including a power feeding coil, the charging device includes a charging device communication unit for performing communication, and a power receiving coil for receiving charging power in a non-contact manner, and communication is performed. Communication is possible between the charging device and the power feeding device, the power feeding device transmits control information to the charging device, and the charging device sets a charging control pattern for controlling the output power of the power feeding device based on the control information. The charging device performs charging control on the power feeding device by generating and transmitting a power feeding request to the power feeding device based on the charging control pattern.

  According to the present invention, the charging device requests control information from the power feeding device, the power feeding device requested for the control information transmits the control information to the charging device, and the charging device determines the output power of the power feeding device based on the control information. By generating a charge control pattern for control and transmitting a power supply request to the power supply device based on the charge control pattern, the vehicle can control the charge stand according to the performance and characteristics of the charge stand. .

1 is a schematic diagram of a contactless charging system according to an embodiment of the present invention. It is the schematic of the electric power feeder and charging device which were provided in the non-contact charging system which concerns on embodiment of this invention. It is the control information of the non-contact charge system which concerns on embodiment of this invention. It is the control information of the non-contact charge system which concerns on embodiment of this invention. It is a sequence diagram of the non-contact charging system which concerns on embodiment of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
The structure of the non-contact charging system according to the embodiment of the present invention is shown in FIG.
The non-contact charging system 1 includes a charging stand 2 and a charging device 5 provided in the vehicle 3. The charging stand 2 is provided with a power feeding device 4. The power feeding device 4 is provided with a power feeding coil 6, and the charging device 5 is provided with a power receiving coil 7. When the vehicle 3 is parked at a predetermined parking position of the charging stand 2, the feeding coil 6 of the charging stand 2 faces the charging stand 2 so that the feeding coil 6 and the receiving coil 7 face each other with a predetermined air gap. For example, the power receiving coil 7 is appropriately disposed on the bottom surface of the vehicle 3.

  The configuration of the power feeding device 4 is shown in FIG. The feeding coil 6 is electrically connected to the feeding device matching unit 8. The power feeding device matching unit 8 is electrically connected to the power conversion unit 9. The power conversion unit 9 is electrically connected to the AC power supply 10. The AC power supply 10 is an AC 200V power supply, for example. The power feeding device control device 11 is electrically connected to the power feeding device matching unit 8, the power source conversion unit 9, and the power feeding device wireless communication unit 12. A non-volatile memory 21 that holds control information for controlling the power supply apparatus 4 when performing non-contact charging is provided inside the power supply apparatus control apparatus 11. A power feeding device antenna 13 is electrically connected to the power feeding device wireless communication unit 12.

  The structure of the charging device 5 is shown in FIG. The power receiving coil 7 is electrically connected to the charging device matching unit 14. The charging device matching unit 14 is electrically connected to the rectifying unit 15. The rectification unit 15 is electrically connected to the detection unit 16 outside the charging device 5. The detection unit 16 is electrically connected to a battery unit 17 outside the charging device 5. The charging device control device 18 is electrically connected to the charging device matching unit 14, the rectification unit 15, the detection unit 16, the battery unit 17, and the charging device wireless communication unit 19. A charging device antenna 20 is electrically connected to the charging device wireless communication unit 19.

Next, the operation of the non-contact charging system according to the embodiment of the present invention will be described.
As shown in FIG. 1, when power is supplied from the charging station 2 to the vehicle 3 by non-contact charging, the power supplied from the AC power supply 10 is converted to the power conversion unit 9 as shown in FIGS. 2 (a) and 2 (b). Then, the voltage and frequency are converted, impedance matching is performed between the power feeding device matching unit 8 and the charging device matching unit 14, and the resultant is supplied to the power feeding coil 6. In the power receiving coil 7 facing the power feeding coil 6 with a predetermined air gap, charging power is generated by the interaction of electromagnetic induction. The charging power is rectified by the rectifying unit 15 via the charging device matching unit 14 and charged to the battery unit 17 via the detecting unit 16 for detecting voltage and current.

At this time, in order to transmit and receive power between the power feeding coil 6 and the power receiving coil 7, depending on the performance of the charging stand 2, in order to supply the maximum power, as shown in FIG. The control to raise is needed. At this time, a range in which the feed power is increased step by step is defined as a power step power value, and a time required until the power step is changed is defined as a power step time. Also, depending on the performance of the charging stand 2, as shown in FIG. 4, the appropriate control method and maximum power supply may differ from the case shown in FIG. There is a power step power value and a power step time of the optimal power step when increasing the power step. For this reason, before transmitting and receiving power between the feeding coil 6 and the receiving coil 7, control information such as the power step power value, power step time, and maximum feeding power of the optimum feeding power for each charging station is controlled by the feeding device control. It is necessary to transmit from the device 11 to the charging device control device 18.

  As shown in FIG. 1, when the vehicle 3 parks at a predetermined parking position of the charging stand 2, the charging device control device 18 (see FIG. 2B) detects parking of the vehicle 3. The means for detecting parking at this time may be any means such as a means for detecting the operation of the parking brake of the vehicle 3 or a means for detecting that the traveling power switch of the vehicle 3 is turned off.

  After the vehicle 3 stops at a predetermined parking position of the charging station 2, wireless communication using radio waves is established between the charging device wireless communication unit 19 and the power feeding device wireless communication unit 12 by a known procedure (FIG. 2 (a) and (See (b)). Thereafter, as shown in the sequence example of FIG. 5, the charging device control device 18 outputs a control information request instruction to the charging device wireless communication unit 19 (A). The charging device wireless communication unit 19 that has received the control information request instruction outputs the control information request via the charging device antenna 20 (see FIG. 2B) (B). When the power supply device wireless communication unit 12 receives the control information request via the power supply device antenna 13 (see FIG. 2A) of the power supply device 4, the power supply device wireless communication unit 12 notifies that the control information request has been received. Is transmitted to the power supply apparatus control device 11 (C). The power supply apparatus control device 11 performs control information reading that reads out control information of the power supply apparatus 4 from the nonvolatile memory 21 (see FIG. 2A) provided therein (D). The control information includes information on the maximum power supply power of the charging station 2, the power step power value limit, and the power step time limit for each charging station 2 as shown in FIGS. 3 and 4, for example. ing. The power supply apparatus control device 11 transmits a control information response instruction including the read control information to the power supply apparatus wireless communication unit 12 (E). The power feeding device radio communication unit 12 outputs a control information response including control information via the power feeding device antenna 13 (F). The charging device wireless communication unit 19 that has received the control information response via the charging device antenna 20 transmits a control information response notification including control information to the charging device control device 18 that is a notification that the control information response has been received. (G).

  Based on the received control information, the charging device control device 18 performs power control for each step of the power step for changing the magnitude of the power feeding power in order to control the power feeding power of the power feeding device 4 in a stepwise manner. A charge control pattern including a step power value and a power step time is created (H). In this charging control pattern, the power step power value and the power step time at each step are arbitrarily set within the range of the maximum supply power of the received control information and the limit of the power step power value and the power step time. Each power step power value and each power step time may take different values for each step. For example, when the maximum supply power of the control information is 10 kW and the limit of the power step power value is 5 kW, the power step power value of each step is 2 kW, 3 kW, 5 kW, respectively (feed power output requested by the charging device control device 18 The maximum required value may be set to be 10 kW, which is the sum of the power step power values, and the power step power values of each step may be set to 3 kW, 5 kW, and 1 kW, respectively (charging device control device) 18 may be set so that the maximum value of the required power supply value requested by 18 is 9 kW which is the sum of the power step power values. In addition, the maximum value of the power supply request value requested by the charging device control device 18 may be equal to or less than the maximum power supply value of the control information. Thereafter, the charging device control device 18 determines a power supply power output request value to be requested to the power supply device 4 based on the power step power value of the step in the charge control pattern, and adds a power supply power output request value to the power supply request instruction. Is transmitted to the charging device wireless communication unit 19 (I). The charging device wireless communication unit 19 that has received the power supply request instruction outputs a power supply request including the power supply output request value via the charging device antenna 20 (J). When the power feeding device wireless communication unit 12 receives a power feeding request via the power feeding device antenna 13, the power feeding device wireless communication unit 12 receives a power feeding request notification including a power feeding power output request value, which is a notification that the power feeding request has been received. It transmits to the electric power feeder control apparatus 11 (K). The power supply device control apparatus 11 that has received the power supply request notification confirms that the control information and the power supply power output request value match, and if they match, the power supply power output from the power supply coil 6 to the power reception coil 7 is confirmed. By controlling the power feeding device matching unit 8 and the power source conversion unit 9 so that power that matches the required value is supplied and performing non-contact charging from the power feeding coil 6 to the power receiving coil 7, The output is updated to update the output of the feed power (L).

After the output update, the power feeding device control device 11 receives the power feeding request and outputs a power feeding response for notifying the charging device that the output has been updated. The instruction is transmitted to the power feeding device wireless communication unit 12 (M). The power feeding device wireless communication unit 12 that has received the power feeding response instruction outputs a power feeding response including the output value of the power feeding power at the time of output update via the power feeding device antenna 13 (N). The charging device wireless communication unit 19 that has received the power feeding response via the charging device antenna 20 sends a power feeding response notification including the output value of the power feeding power at the time of output update, which is a notification that the power feeding response has been received. 18 (O). The charging device control device 18 that has received the power supply response notification has reached the total value of the power step power values in the charge control pattern (the maximum value of the power supply power output request value) when the output power is updated. (P). If the output value of the feed power at the time of output update has not reached the total value of the power step power values in the charge control pattern, the charging device control device 18 refers to the charge control pattern and is determined as the power step time. Then, based on the power step power value of the next step, the power supply power output request value required for the power supply device 4 is determined, and the operation I is performed. If the output value of the power supply power at the time of output update has reached the total value of the power step power value in the charge control pattern, the power step power value until the charging to the battery unit 17 (see FIG. 2) is completed. Continue charging with the total value of (Q).

  If the power supply control device 11 receives the power supply request notification according to the procedure K and then confirms that the control information and the power supply power output request value match, if the two do not match, the power supply The device control device 11 determines that an abnormality has occurred in the charging operation, and the power supply device control device 11 transmits information indicating that an abnormality has occurred in the charging operation to the power supply device wireless communication unit 12 to transmit the power supply device 4. To stop. For example, the power supply device control device 11 determines whether the power supply power output request value is equal to or less than the maximum power supply power of the control information, or the power step power value calculated from the power supply device output request value is the limit of the power step power value of the control information. Whether the reception timing of the power supply request is below the limit of the power step time, whether the reception timing of the power supply request is below the limit of the power step time, or a combination thereof, and whether they match Judging. The power feeding device wireless communication unit 12 that has received information that an abnormality has occurred in the charging operation outputs information that an abnormality has occurred in the charging operation via the power feeding device antenna 13 (N). The charging device wireless communication unit 19 that has received information that an abnormality has occurred in the charging operation via the charging device antenna 20 transmits information that an abnormality has occurred in the charging operation to the charging device controller 18 ( O). The charging device control device that has received information that an abnormality has occurred in the charging operation stops the charging device 5.

  In this way, the charging device requests control information from the power feeding device, the power feeding device requested for the control information transmits the control information to the charging device, and the charging device determines the output power of the power feeding device based on the control information. By generating a charge control pattern for control and transmitting a request for output of power supply to the power supply device based on the charge control pattern, the vehicle can charge control the charge stand according to the performance and characteristics of the charge stand. it can.

  In this embodiment, the charging control pattern generated by the charging device control device includes both the power step power value and the power step time for each step of the power step that changes the magnitude of the feeding power based on the control information. The charge control pattern to be generated may include a power step power value for each step of the power step, and the power step time may be a sequence using a preset value, or the charge control to be generated The pattern may include a power step time for each step of the power step, and the power step power value may be a sequence using a preset value.

  In this embodiment, the communication between the power supply device 4 and the charging device 5 is wireless communication using radio waves via the power supply device wireless communication unit 12 and the charging device wireless communication unit 19. Non-contact communication other than wireless communication may be used, or contact communication may be performed by connecting the power feeding device 4 and the charging device 5 with a cable or the like.

  In this embodiment, when the power supply apparatus control device 11 determines that an abnormality has occurred in the charging operation, the power supply apparatus 4 is stopped, but the output update may not be performed.

  In this embodiment, the charging device 5 requests control information from the power supply device 4, and the power supply device 4 that has been requested for the control information transmits control information to the charging device 5. Control information may be transmitted from the device 4 to the charging device 5. For example, when establishing wireless communication using radio waves between the charging device wireless communication unit 19 and the power feeding device wireless communication unit 12, the communication connection response transmitted from the power feeding device 4 includes control information and is transmitted to the charging device 5. Alternatively, the control information may be transmitted from the power supply device 4 to the charging device 5 after the wireless communication is established.

  DESCRIPTION OF SYMBOLS 1 Non-contact charging system, 2 Charging stand, 3 Vehicle, 4 Power feeding device, 5 Charging device, 6 Power feeding coil, 7 Power receiving coil, 12 Power feeding device wireless communication part (Power feeding device communication part), 19 Charging device wireless communication part (Charging Device communication department).

Claims (4)

A non-contact charging system for non-contact charging, comprising a charging device mounted on a vehicle and a charging stand,
The charging stand is
A power supply device for supplying power to the charging device;
A power supply device communication unit provided in the power supply device for performing communication;
A power supply coil that is provided in the power supply device and that supplies power for charging in a contactless manner;
The power supply device holds control information for the contactless charging,
The charging device is:
A charging device communication unit for performing the communication;
A power receiving coil for receiving the charging power in a non-contact manner,
The communication is possible between the charging device and the power feeding device, the power feeding device transmits the control information to the charging device, and the charging device is configured to control the power feeding device based on the control information. A charging control pattern for controlling output power is generated, and the charging device performs charging control on the power feeding device by transmitting a power feeding request to the power feeding device based on the charging control pattern. Non-contact charging system.   The charge control pattern includes at least one of a power step power value of a power step for changing the magnitude of the feeding power and a power step time of a power step for changing the magnitude of the feeding power. The contactless charging system described.   The power supply device communication unit is a power supply device wireless communication unit for performing wireless communication, and the charging device communication unit is a charging device wireless communication unit for performing wireless communication between the charging device and the power supply device. The contactless charging system according to claim 1, wherein wireless communication is possible between the two. A power feeding device for supplying power to the charging device;
A power supply device communication unit provided in the power supply device for performing communication;
A vehicle including the charging device that is provided in the power supply device and is charged by a charging stand that includes a power supply coil that supplies power for charging in a contactless manner,
The charging device is:
A charging device communication unit for performing the communication;
A power receiving coil for receiving the charging power in a non-contact manner,
The communication is possible between the charging device and the power feeding device, the power feeding device transmits the control information to the charging device, and the charging device is configured to control the power feeding device based on the control information. A charging control pattern for controlling output power is generated, and the charging device performs charging control on the power feeding device by transmitting a power feeding request to the power feeding device based on the charging control pattern. vehicle.

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