JP2017127064A - Vehicle and power transmission system - Google Patents

Abstract

In a vehicle and a power transmission system configured to receive power in a non-contact manner from a power transmission device provided outside the vehicle, the life of a relay provided between a power reception unit mounted on the vehicle and a power storage device is improved. Let
A vehicle ECU 500 controls external charging by turning on a charging relay 220, and notifies a power transmission device 20 of power transmission stop when a foreign object is detected during external charging. The vehicle ECU 500 further predicts the travel start time after the external charging this time from the history of the travel start time after the external charging. When vehicle ECU 500 determines that the power storage device 300 can be fully charged by the predicted travel start time when a foreign object is detected, vehicle ECU 500 maintains charging relay 220 on.
[Selection] Figure 1

Description

  The present invention relates to a vehicle and a power transmission system, and more particularly, to a vehicle and a power transmission system configured to receive power without contact from a power transmission device provided outside the vehicle.

  There is known a power transmission system that transmits power from a power transmission device to a power reception device in a contactless manner (see, for example, Patent Documents 1 to 6). In such a power transmission system, it is possible to detect foreign matter interposed between the power transmission unit of the power transmission device and the power reception unit of the power reception device.

  For example, Japanese Patent Application Laid-Open No. 2007-267578 (Patent Document 1) transmits power from a power transmission antenna (power transmission unit) provided outside of a vehicle to a vehicle-mounted power reception antenna (power reception unit) in a non-contact manner. ) Is disclosed. This power transmission system includes an obstacle detection device that detects an obstacle (foreign matter) interposed between a power transmission antenna (power transmission unit) and a power reception antenna (power reception unit). Then, when an obstacle (foreign matter) is detected by the obstacle detection device, power transmission from the power transmission antenna to the power reception antenna is stopped (see Patent Document 1).

JP 2007-267578 A JP2013-154815A JP2013-146154A JP2013-146148A JP 2013-110822 A JP 2013-126327 A

  In the power transmission system as described above, generally, a relay is provided between the power receiving unit of the vehicle and the power storage device, and when the power storage device is not charged by the power transmission device, the relay is off ( Non-conducting state).

  However, when the power storage device is charged by the power transmission device, if the relay is turned off / on for each foreign object detection / non-detection (every foreign object entering / exiting the foreign object detection area), the relay is operated more times to increase the relay. The life of the is shortened. For example, when an animal as a foreign object repeatedly enters / exits the foreign object detection area, if the relay is turned off / on each time, the life of the relay can be significantly shortened.

  The present invention has been made to solve such a problem, and an object thereof is to be mounted on a vehicle in a vehicle and a power transmission system configured to receive power in a non-contact manner from a power transmission device provided outside the vehicle. It is to improve the life of the relay provided between the power receiving unit and the power storage device.

  According to this invention, the vehicle includes a power reception unit, a power storage device, a relay, a detection unit, and a control device. The power reception unit receives power in a non-contact manner from a power transmission unit of a power transmission device provided outside the vehicle. The power storage device is charged by receiving power received by the power receiving unit. The relay is provided between the power reception unit and the power storage device. The detection unit detects a foreign object interposed between the power reception unit and the power transmission unit. The control device controls the charging of the power storage device by setting the relay in a conductive state, and notifies the power transmission device that power transmission is stopped when a foreign object is detected by the detection unit during power transmission from the power transmission unit to the power reception unit. The control device further predicts the current travel start time after charging the power storage device from the history of the travel start time after charging the power storage device. When the foreign substance is detected by the detection unit, the control device maintains the relay in a conductive state when the power storage device can be fully charged by the predicted travel start time.

  According to the invention, the power transmission system includes a power transmission device provided outside the vehicle, a power reception unit, a power storage device, a relay, a detection unit, and a control device. The power reception unit is mounted on the vehicle and receives power from the power transmission unit of the power transmission device in a contactless manner. The power storage device is charged by receiving power received by the power receiving unit. The relay is provided between the power reception unit and the power storage device. The detection unit detects a foreign object interposed between the power reception unit and the power transmission unit. The control device controls the charging of the power storage device by setting the relay in a conductive state, and notifies the power transmission device that power transmission is stopped when a foreign object is detected by the detection unit during power transmission from the power transmission unit to the power reception unit. The control device further predicts the current travel start time after charging the power storage device from the history of the travel start time after charging the power storage device. When the foreign substance is detected by the detection unit, the control device maintains the relay in a conductive state when the power storage device can be fully charged by the predicted travel start time.

  In each of the above inventions, the current travel start time after charging the power storage device is predicted from the history of the travel start time after charging the power storage device. When the detection unit detects a foreign object, power transmission from the power transmission device is stopped, but when the power storage device can be fully charged by the predicted travel start time, the relay is maintained in a conductive state. . Thus, the relay is not turned off / on each time the foreign matter is detected / not detected by the detection unit. Therefore, according to the present invention, the life of the relay can be improved.

  According to the present invention, in a vehicle and a power transmission system configured to receive power in a non-contact manner from a power transmission device provided outside the vehicle, a relay provided between a power reception unit mounted on the vehicle and a power storage device. Lifespan can be improved.

1 is an overall configuration diagram of a power transmission system according to an embodiment of the present invention. It is the figure which showed an example of the circuit structure of the power receiving part and power transmission part which are shown in FIG. It is the figure which showed the operation example of the charging relay when a foreign material is detected during external charging. It is the figure which showed the other operation example of the charging relay when a foreign material is detected during external charging. It is a flowchart explaining the procedure of the process performed by vehicle ECU after a foreign material detection.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

  FIG. 1 is an overall configuration diagram of a power transmission system according to an embodiment of the present invention. Referring to FIG. 1, the power transmission system includes a vehicle 10 and a power transmission device 20. Power transmission device 20 is provided outside vehicle 10 and can charge power storage device 300 mounted on vehicle 10 (hereinafter, charging power storage device 300 of vehicle 10 by power transmission device 20 is also referred to as “external charging”). .)

  The vehicle 10 includes a power receiving unit 100, a filter circuit 150, a rectifier circuit 200, a power storage device 300, a power generation device 400, a charging relay 220, and an SMR (System Main Relay) 310. The vehicle 10 further includes a vehicle ECU (Electronic Control Unit) 500, a camera 510, and a communication unit 520.

  The power receiving unit 100 receives electric power (alternating current) output from a power transmitting unit 700 (described later) of the power transmitting device 20 through a magnetic field in a non-contact manner. Power reception unit 100 includes, for example, a resonance circuit for receiving power from power transmission unit 700 in a contactless manner. The resonance circuit includes a coil and a capacitor. However, when a desired resonance state is formed only by the coil, the capacitor may not be provided. The power receiving unit 100 is provided, for example, in the lower part of the vehicle body near the front of the vehicle body, and the power transmission device 20 is provided on the ground surface or in the ground.

  The filter circuit 150 is provided between the power receiving unit 100 and the rectifier circuit 200 and suppresses harmonic noise that is generated when the power receiving unit 100 receives power. The filter circuit 150 is configured by an LC circuit including an inductor and a capacitor, for example. Rectifier circuit 200 rectifies the AC power received by power receiving unit 100 and outputs the rectified power to power storage device 300. The rectifier circuit 200 includes a smoothing capacitor together with a rectifier.

  Power storage device 300 is a rechargeable DC power supply, and includes a secondary battery such as a lithium ion battery or a nickel metal hydride battery. The power storage device 300 stores power output from the rectifier circuit 200 and also stores power generated by the power generation device 400. Then, power storage device 300 supplies the stored power to power generation device 400. Note that an electric double layer capacitor or the like may be employed as the power storage device 300.

  Power generation device 400 generates a driving force for driving vehicle 10 using electric power stored in power storage device 300. Although not particularly illustrated, power generation device 400 includes, for example, an inverter that receives electric power from power storage device 300, a motor driven by the inverter, a drive wheel driven by the motor, and the like. Power generation device 400 may include a generator that generates electric power for charging power storage device 300 and an engine that can drive the generator.

  Charging relay 220 is provided between rectifier circuit 200 and power storage device 300. Charging relay 220 is turned on (conducting state) during external charging. The charging relay 220 corresponds to one embodiment of the “relay” in the present invention. SMR 310 is provided between power storage device 300 and power generation device 400. The SMR 310 is turned on when activation of the power generation device 400 is requested.

  Camera 510 is arranged to be able to image a foreign object interposed between power reception unit 100 and power transmission unit 700 when power reception unit 100 and power transmission unit 700 of power transmission device 20 face each other. For example, the camera 510 is disposed in the vicinity of the power receiving unit 100, and is installed so as to be able to image the power transmitting unit 700 when the power receiving unit 100 and the power transmitting unit 700 of the power transmitting device 20 face each other. The “foreign matter” referred to here is a thing that is not a constituent of the vehicle 10 and the power transmission device 20, and includes not only a static thing but also an animal. The camera 510 includes, for example, a CMOS (Complementary Metal Oxide Semiconductor) image sensor and a CCD (Charge-Coupled Device) image sensor.

  Vehicle ECU 500 includes a central processing unit (CPU), a storage device, an input / output buffer, and the like (all not shown), receives signals from various sensors, and controls various devices in vehicle 10. For example, vehicle ECU 500 executes traveling control of vehicle 10 and charging control during external charging with charging relay 220 turned on (conducting state).

  In addition, vehicle ECU 500 executes a foreign object detection process for detecting a foreign object interposed between power reception unit 100 and power transmission unit 700 based on an image captured by camera 510. Various known image analysis techniques can be applied to foreign object detection using the camera 510. When a foreign object is detected during external charging, vehicle ECU 500 notifies power transmission device 20 of power transmission stop by communication unit 520.

  The communication unit 520 is configured to wirelessly communicate with the communication unit 810 of the power transmission device 20. The communication unit 520 transmits information such as execution / stop of power transmission and the power reception status (power reception voltage) of the vehicle 10 to the communication unit 810 of the power transmission device 20 during external charging.

  On the other hand, the power transmission device 20 includes a power supply unit 600, a filter circuit 610, a power transmission unit 700, a power supply ECU 800, and a communication unit 810. The power supply unit 600 receives power from an external power supply 900 such as a commercial power supply and generates AC power having a predetermined transmission frequency. As an example, power supply unit 600 includes a power factor correction (PFC) circuit and an inverter that converts DC power received from the PFC circuit into AC power having a predetermined transmission frequency (for example, several tens of kHz). Consists of including.

  The power transmission unit 700 receives AC power having a transmission frequency from the power supply unit 600 and transmits the AC power to the power reception unit 100 of the vehicle 10 in a non-contact manner through a magnetic field generated around the power transmission unit 700. Power transmission unit 700 includes, for example, a resonance circuit for transmitting power to power reception unit 100 in a contactless manner. The resonance circuit includes a coil and a capacitor. However, when a desired resonance state is formed only by the coil, the capacitor may not be provided.

  Filter circuit 610 is provided between power supply unit 600 and power transmission unit 700, and suppresses harmonic noise generated from power supply unit 600. The filter circuit 610 is configured by an LC circuit including an inductor and a capacitor, for example.

  Communication unit 810 is configured to wirelessly communicate with communication unit 520 of vehicle 10. The communication unit 810 receives information from the communication unit 520 of the vehicle 10 such as execution / stop of power transmission and the power reception status (power reception voltage) of the vehicle 10 during external charging.

  Power supply ECU 800 includes a CPU, a storage device, an input / output buffer, and the like (all not shown), receives signals from various sensors, and controls various devices in power transmission device 20. For example, power supply ECU 800 performs switching control of power supply unit 600 such that power supply unit 600 generates AC power having a predetermined transmission frequency.

  Further, power supply ECU 800 stops power supply from power supply unit 600 to power transmission unit 700 when a notification of power transmission stop is received from vehicle 10 through communication unit 810 when a foreign object is detected in vehicle 10 during external charging. The power supply unit 600 is controlled.

  In this power transmission system, AC power having a predetermined transmission frequency is supplied from the power supply unit 600 to the power transmission unit 700 through the filter circuit 610 in the power transmission device 20. Each of power transmission unit 700 and power reception unit 100 of vehicle 10 includes a coil and a capacitor, and is designed to resonate at a transmission frequency.

  When AC power is supplied from the power supply unit 600 to the power transmission unit 700 through the filter circuit 610, energy is transmitted from the power transmission unit 700 to the power reception unit 100 through a magnetic field formed between the coil of the power transmission unit 700 and the coil of the power reception unit 100. (Power) moves. Then, the energy (power) transferred to the power receiving unit 100 is supplied to the power storage device 300 through the filter circuit 150 and the rectifier circuit 200.

  FIG. 2 is a diagram illustrating an example of a circuit configuration of power reception unit 100 and power transmission unit 700 illustrated in FIG. 1. Referring to FIG. 2, power reception unit 100 includes a coil 102 and a capacitor 104. The capacitor 104 is connected in series with the coil 102 to form a resonance circuit with the coil 102. The capacitor 104 is provided to adjust the resonance frequency of the power receiving unit 100. The Q value indicating the resonance strength of the resonance circuit constituted by the coil 102 and the capacitor 104 is preferably 100 or more.

  Power transmission unit 700 includes a coil 702 and a capacitor 704. The capacitor 704 is connected in series with the coil 702 to form a resonance circuit with the coil 702. Capacitor 704 is provided to adjust the resonance frequency of power transmission unit 700. The Q value of the resonance circuit constituted by the coil 702 and the capacitor 704 is also preferably 100 or more.

  In each of power transmission unit 700 and power reception unit 100, the capacitor may be connected to the coil in parallel. Further, when a desired resonance frequency can be achieved without providing a capacitor, a configuration without a capacitor may be employed.

  Although not particularly illustrated, the structures of the coils 102 and 702 are not particularly limited. For example, when the power reception unit 100 and the power transmission unit 700 face each other, a spiral or spiral coil wound around an axis along the direction in which the power reception unit 100 and the power transmission unit 700 are arranged is provided in each of the coils 102 and 702. Can be adopted. Alternatively, when the power reception unit 100 and the power transmission unit 700 face each other, a coil formed by winding an electric wire around a ferrite plate whose normal direction is the direction in which the power reception unit 100 and the power transmission unit 700 are aligned is each of the coils 102 and 702. May be adopted.

  Referring to FIG. 1 again, in the power transmission system according to the present embodiment, charging relay 220 is provided between power storage device 300 and rectifier circuit 200, and when external charging is not performed (for example, during traveling), Charging relay 220 is turned off (non-conducting state).

  When a foreign object is detected during external charging, vehicle ECU 500 notifies power transmission device 20 of power transmission stop by communication unit 520, and power transmission from power transmission unit 700 of power transmission device 20 to power reception unit 100 of vehicle 10 is stopped. . However, if the charge relay 220 is turned off / on for every foreign object detection / non-detection (every foreign object entering / exiting the foreign object detection area), the life of the charge relay 220 is increased by increasing the number of operations of the charge relay 220. Becomes shorter. For example, when the animal repeatedly enters / exits the foreign object detection area and the charge relay 220 is turned off / on each time, the life of the charge relay 220 can be significantly shortened.

  Therefore, in the power transmission system according to this embodiment, the following measures are taken to improve the life of charging relay 220. That is, vehicle ECU 500 predicts the current travel start time after external charging from the history of travel start time after external charging. When vehicle ECU 500 detects a foreign object during external charging, vehicle ECU 500 notifies power transmission device 20 that power transmission is stopped, but determines that power storage device 300 can be fully charged by the predicted travel start time. The charging relay 220 is kept on (conductive state). Thereby, the ON / OFF frequency | count of the charging relay 220 is suppressed, and the lifetime improvement of the charging relay 220 is achieved. Hereinafter, a typical operation of the charging relay 220 when a foreign object is detected during external charging will be described with reference to FIGS.

  FIG. 3 is a diagram illustrating an operation example of the charging relay 220 when a foreign object is detected during external charging. Referring to FIG. 3, the horizontal axis indicates time, and the vertical axis indicates SOC (State Of Charge) of power storage device 300.

  At time t0, charging relay 220 is turned on to start external charging, and the SOC of power storage device 300 increases with time. Assume that a foreign object is detected in the foreign object detection area by the camera 510 at time t1. When a foreign object is detected, the power transmission stop is notified from the vehicle 10 to the power transmission device 20, and the power transmission to the vehicle 10 is stopped in the power transmission device 20. In the vehicle 10, the charging relay 220 is not turned off when the foreign object is detected, and the charging relay 220 is kept on.

  When foreign matter is not detected due to the foreign matter leaving the foreign matter detection area at time t2, the power transmission execution notification is sent from the vehicle 10 to the power transmission device 20, and power transmission to the vehicle 10 is resumed in the power transmission device 20. As the power transmission from the power transmission device 20 resumes, the SOC of the power storage device 300 increases again. The slight decrease in SOC between time t1 and time t2 when power transmission from power transmission device 20 was stopped due to foreign object detection is due to power consumption of auxiliary equipment including vehicle ECU 500 and camera 510. It is.

  Then, at time t4, when power storage device 300 is fully charged due to the SOC becoming MAX, charging relay 220 is turned off, and external charging is completed. Thereafter, traveling starts at time t5.

  Here, time t3 is a limit time at which power storage device 300 can be fully charged at travel start time t5 when external charging is resumed due to foreign object non-detection at this time. In the power transmission system according to this embodiment, vehicle ECU 500 predicts the current travel start time after external charging, that is, time t5, from the past travel start time after external charging. For example, the vehicle ECU 500 predicts the travel start time t5 after the current external charge by statistically processing the travel start time after the past external charge. Then, the vehicle ECU 500 calculates the time t3 from the required charging time calculated from the remaining charge amount until the fully charged state that can be calculated from the current SOC and the charging rate, and the predicted travel start time t5. To do.

  When the foreign object detection state is released before time t3 as shown in FIG. 3, the external charging is resumed due to the non-detection of the foreign object, so that the power storage device 300 is fully charged by the travel start time t5. Can be charged. On the other hand, when the foreign object detection state is released after time t3, power storage device 300 cannot be fully charged by traveling start time t5 even if external charging is resumed due to non-detection of the foreign object.

  FIG. 4 is a diagram illustrating another operation example of the charging relay 220 when a foreign object is detected during external charging. Referring to FIG. 4, as in the case of FIG. 3, at time t0, charging relay 220 is turned on and external charging is started. When a foreign object is detected in the foreign object detection area by camera 510 at time t1, external charging is stopped by stopping power transmission from power transmission device 20 to vehicle 10, but charging relay 220 is kept on. .

  In the case shown in FIG. 4, a foreign object is detected even at the time t3 described above. Even if the foreign object detection state is released after time t3, even if external charging is resumed due to non-detection of the foreign object, the power storage device 300 cannot be fully charged by the traveling start time t5. Therefore, vehicle ECU 500 turns off charging relay 220 when a foreign object is detected even at time t3.

  Therefore, even if the foreign object detection state is canceled by the foreign object leaving the foreign object detection area at time t4, vehicle ECU 500 does not turn on charging relay 220 again and resume external charging. The priority is given to the improvement of the life of the charging relay 220 by suppressing the number of on / off times of the charging relay 220, rather than making the power storage device 300 fully charged by the traveling start time t5.

  Thus, in the power transmission system according to this embodiment, when a foreign object is detected during external charging, vehicle ECU 500 notifies power transmission device 20 that power transmission is stopped, but stores power by predicted travel start time t5. When it is determined that device 300 can be fully charged, charging relay 220 is maintained on (conducting state). Thereby, the charging relay 220 is not turned off / on every time the foreign object is detected / not detected. Therefore, according to this embodiment, the life of charging relay 220 can be improved.

  FIG. 5 is a flowchart illustrating a procedure of processing executed by vehicle ECU 500 after foreign object detection. This flowchart is executed when a foreign object is detected during the execution of external charging with the charging relay 220 turned on.

  Referring to FIG. 5, vehicle ECU 500 determines whether or not a foreign object is detected in the foreign object detection area by camera 510 (step S10). This process is provided to determine whether or not a foreign object has been detected again after the foreign object detection state is canceled in step S30 described later (foreign object non-detection) and external charging is resumed in step S70. It is. If it is determined in step S10 that no foreign matter has been detected (NO in step S10), the process proceeds to step S70 described later.

  If it is determined in step S10 that a foreign object is detected (YES in step S10), vehicle ECU 500 notifies power transmission device 20 of power transmission stop by communication unit 520 (step S20). This stops external charging. Note that the vehicle ECU 500 does not immediately turn off the charging relay 220 due to foreign object detection, but maintains the charging relay 220 on here.

  Next, vehicle ECU 500 determines whether or not the foreign object detection state has been canceled (step S30). That is, vehicle ECU 500 determines whether or not a foreign object has left the foreign object detection area by camera 510. When it is determined that the foreign object detection state has not been released (NO in step S30), vehicle ECU 500, based on the past history of external charging, more specifically, based on the history of travel start time after external charging, The travel start time after this external charging (time t5 in FIGS. 3 and 4) is predicted (step S40).

  Then, if the foreign object detection state is canceled, vehicle ECU 500 determines whether or not power storage device 300 can be fully charged by the travel start time predicted in step S40 (step S50). Whether or not the power storage device 300 can be fully charged depends on the required charge time calculated from the remaining charge amount and the charge rate until the fully charged state that can be calculated from the current SOC, and the start of travel predicted in step S40. This can be determined by comparing the time until the time.

  If it is determined in step S50 that power storage device 300 can be fully charged by the travel start time (YES in step S50), the process returns to step S30 to determine whether the foreign object detection state has been released. Again.

  On the other hand, when it is determined in step S50 that power storage device 300 cannot be fully charged by the travel start time (NO in step S50), vehicle ECU 500 turns off charging relay 220 (step S60). Thereby, external charging is completed.

  If it is determined in step S30 that the foreign object detection state has been released (YES in step S30), vehicle ECU 500 notifies power transmission device 20 of power transmission using communication unit 520 (step S70). Thereby, external charging is resumed. Even when it is determined in step S10 that no foreign matter has been detected (NO in step S10), the process proceeds to step S70, and the power transmission apparatus 20 is notified of the execution of power transmission, whereby external charging is performed. The

  Subsequent to step S70, vehicle ECU 500 determines whether power storage device 300 is in a fully charged state (step S80). If it is determined that the battery is not fully charged (NO in step S80), the process returns to step S10 to determine again whether or not a foreign object has been detected. On the other hand, when it is determined in step S80 that power storage device 300 has been fully charged (YES in step S80), vehicle ECU 500 notifies power transmission device 20 of power transmission stop by communication unit 520 (step S90). Thereafter, vehicle ECU 500 shifts the process to step S60, and external charging is completed (completed).

  As described above, in this embodiment, the travel start time after this external charging is predicted from the history of the travel start time after external charging. When a foreign object is detected in the foreign object detection area by the camera 510, power transmission from the power transmission device 20 is stopped, but when the power storage device 300 can be fully charged by the predicted travel start time, a charging relay 220 is kept on (conducting state). Thereby, the charging relay 220 is not turned off / on every time the foreign object is detected / not detected. Therefore, according to this embodiment, the life of charging relay 220 can be improved.

  In the above-described embodiment, the foreign object is imaged by the camera 510 of the vehicle 10 and the foreign object is detected based on the image captured by the camera 510. However, the foreign object detection method uses a camera. It is not limited to the method. For example, a foreign object detection coil may be arranged below or around the power receiving unit 100 to detect a foreign object based on a voltage change of the foreign object detection coil, or a laser or ultrasonic wave may be reflected instead of the camera. It may be used to detect foreign matter.

  In the above embodiment, the foreign object is detected in the vehicle 10. However, the power transmission device 20 detects the foreign material on the power transmission device 20 side by providing a camera, a foreign object detection coil, or the like. The result may be notified from the power transmission device 20 to the vehicle 10. In this case, since the foreign substance can be detected on the power transmission device 20 side, it is not necessary to transmit the notification of power transmission stop in step S20 in FIG. 5 or the notification of power transmission execution in step S70 from the vehicle 10 to the power transmission device 20. .

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

  DESCRIPTION OF SYMBOLS 10 Vehicle, 20 Power transmission device, 100 Power receiving part, 102,702 Coil, 104,704 Capacitor, 150,610 Filter circuit, 200 Rectifier circuit, 220 Charging relay, 300 Power storage device, 310 SMR, 400 Power generation device, 500 Vehicle ECU , 510 camera, 520, 810 communication unit, 600 power supply unit, 700 power transmission unit, 800 power supply ECU, 900 external power supply.

Claims (2)

A power receiving unit that receives power in a non-contact manner from a power transmission unit of a power transmission device provided outside the vehicle;
A power storage device charged by receiving power received by the power receiving unit;
A relay provided between the power reception unit and the power storage device;
A detection unit for detecting a foreign object interposed between the power reception unit and the power transmission unit;
A control device that controls charging of the power storage device by setting the relay to a conductive state, and that notifies the power transmission device that power transmission is stopped when a foreign object is detected by the detection unit during power transmission from the power transmission unit to the power reception unit And
The control device further includes:
From the history of the travel start time after charging the power storage device, predict the current travel start time after charging the power storage device,
A vehicle that maintains the relay in a conducting state when foreign matter is detected by the detection unit and the power storage device can be fully charged by the charging by the predicted travel start time. A power transmission device provided outside the vehicle;
A power receiving unit mounted on the vehicle and receiving power from the power transmission unit of the power transmission device in a contactless manner;
A power storage device charged by receiving power received by the power receiving unit;
A relay provided between the power reception unit and the power storage device;
A detection unit for detecting a foreign object interposed between the power reception unit and the power transmission unit;
A control device that controls charging of the power storage device by setting the relay to a conductive state, and that notifies the power transmission device that power transmission is stopped when a foreign object is detected by the detection unit during power transmission from the power transmission unit to the power reception unit And
The control device further includes:
From the history of the travel start time after charging the power storage device, predict the current travel start time after charging the power storage device,
A power transmission system that maintains the relay in a conducting state when the foreign matter is detected by the detection unit and the power storage device can be fully charged by the charging by the predicted travel start time.

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