WO2019087822A1 - Charging communication control device, on-vehicle machine, charging communication control system, and charging communication control method - Google Patents

Abstract

This charging communication control device communicates information about charging control with a wireless power transmission device that charges a vehicle driving battery by transmitting power in a noncontact manner to a vehicle on which the battery is mounted. A frequency band used for the power transmission carried out by the wireless power transmission device and a frequency band for signals transmitted from an antenna deployed on the vehicle to a vehicle communication machine partially overlap. The charging communication control device is provided with a radio transmission unit that transmits, to the wireless power transmission device, a stop request signal for requesting suspension of the power transmission by the wireless power transmission device, when the antenna transmits signals to the communication machine.

Description

Charging communication control device, in-vehicle device, charging communication control system, and charging communication control method

The present invention relates to a charge communication control device, an in-vehicle device, a charge communication control system, and a charge communication control method.
This application claims the priority based on Japanese Patent Application No. 2017-212947 filed on Nov. 2, 2017, and incorporates all the contents described in the aforementioned Japanese application.

2. Description of the Related Art Hybrid vehicles (HVs) that use both an electric motor and an engine, and electric vehicles (EVs) that are not equipped with an engine and are driven by an electric motor (EVs) are becoming widespread. Vehicles such as hybrid vehicles and electric vehicles are equipped with a battery for driving an electric motor. Charging of the battery is performed at a charging station installed at a gas station, an expressway service area, and other charging stations. In recent years, practical use of a wireless power transmission device that wirelessly transmits power to a vehicle using a magnetic resonance type wireless power transmission technology and charges a battery has been advanced. The frequency used for wireless power transfer is approximately 85 kHz. The vehicle is equipped with a charge ECU that controls charging of a battery and a charge communication control device, and the charge communication control device transmits / receives information necessary for charge control by the charge ECU to / from the charge device.

On the other hand, a vehicle communication system for locking and unlocking a vehicle door without using a mechanical key has been put to practical use. Specifically, a keyless entry system that locks or unlocks a vehicle door by wireless remote control using a portable device carried by the user, a user carrying the portable device approaches the vehicle, or only holds the door handle The smart entry (registered trademark) system etc. which unlocks a vehicle door by this, etc. are utilized.
A vehicle communication system for starting a vehicle engine without using a mechanical key is also in practical use. Specifically, a push-start system has been put into practical use, in which a user carrying a portable device starts an engine simply by pressing an engine start button.
In such a vehicle communication system, the on-vehicle device performs wireless communication with the portable device. In the wireless communication, a signal is transmitted to the portable device using a low frequency (LF) band radio wave, specifically, a 125 kHz radio wave, from the transmitting antenna of the on-vehicle device, and the portable device receiving the signal receives UHF (Ultra High) This is performed by transmitting a response signal using radio waves in the [Frequency] band. The in-vehicle device performs control such as locking / unlocking and engine start after performing authentication and position confirmation of the portable device.

JP, 2013-172473, A

The charge communication control device according to this aspect communicates information related to charge control with a wireless power transmission device that charges the battery by transmitting power without contact to a vehicle equipped with a battery for driving a vehicle. A part of the frequency band used for power transmission by the wireless power transmission apparatus, and the frequency band of a signal transmitted from an antenna provided on the vehicle to a communicator for the vehicle The wireless power transmission apparatus further includes a wireless transmission unit that transmits to the wireless power transmission apparatus a stop request signal that requests the wireless power transmission apparatus to stop power transmission when the antenna transmits a signal to the communication device.

The vehicle-mounted device according to the present aspect is a signal for detecting the position of the communication device carried by the user when locking / unlocking operation or engine start operation of a door of a vehicle equipped with a battery for driving a vehicle is performed, A vehicle-mounted device that transmits from an antenna provided in the vehicle, wherein a frequency band used for power transmission by a wireless power transmission device that charges the battery by transmitting power without contact to the vehicle, and the antenna The frequency band of the signal transmitted from the vehicle is partially overlapped, and the predetermined signal for stopping the power transmission by the wireless power transmission apparatus when the locking / unlocking operation of the door of the vehicle or the engine start operation is performed And a predetermined signal transmission unit for transmitting

The in-vehicle device according to the present aspect is provided on a tire of a vehicle equipped with a battery for driving a vehicle, and requests air pressure information from a communication device that wirelessly transmits a tire air pressure signal obtained by detecting the air pressure of the tire. An on-vehicle device for transmitting a demand signal of the vehicle from an antenna provided in the vehicle, receiving the tire pressure signal sent from the communication device in response to the request signal, and monitoring the air pressure of the tire, The frequency band used for power transmission by the wireless power transmission device that charges the battery by transmitting power without contact to the vehicle partially overlaps the frequency band of the signal transmitted from the antenna. A predetermined signal transmission for transmitting a predetermined signal for stopping power transmission by the wireless power transmission apparatus prior to transmission of the request signal to the communication device It provided with a part.

The charge communication control method according to the present aspect communicates information related to charge control with a wireless power transmission device that charges the battery by transmitting power without contact to a vehicle equipped with a battery for driving a vehicle. And a frequency band used for power transmission by the wireless power transmission apparatus, and a frequency band of a signal transmitted from an antenna provided on the vehicle to a communicator for the vehicle. And transmitting to the wireless power transmission apparatus a stop request signal requesting the wireless power transmission apparatus to stop power transmission when the antenna transmits a signal to the communication apparatus, and When it is confirmed that the power transmission is stopped by performing communication between them, a stop signal indicating that the power transmission is stopped is transmitted.
The present application can not only be realized as a charge communication control apparatus provided with a processing unit that performs such characteristic processing, but also as a program for causing a computer to execute such characteristic processing steps. can do. Further, the present invention can be realized as a semiconductor integrated circuit that realizes part or all of the charge communication control device and the in-vehicle device, or can be realized as another system including the charge communication control device and the in-vehicle device.

FIG. 1 is a block diagram showing a configuration example of a charge communication control system according to a first embodiment. FIG. 2 is a block diagram showing a configuration example of a charge communication control device according to Embodiment 1. 1 is a block diagram showing a configuration example of a vehicle door locking and unlocking system according to a first embodiment. FIG. 1 is a block diagram showing an example of the configuration of an in-vehicle apparatus according to a first embodiment. FIG. 1 is a block diagram showing an example of the configuration of a portable device according to Embodiment 1. 5 is a flowchart showing a processing procedure related to charge communication control according to the first embodiment. FIG. 7 is a block diagram showing an example of a configuration of a tire pressure monitoring system according to a second embodiment. FIG. 7 is a block diagram showing an exemplary configuration of a detection device according to a second embodiment. It is a flowchart which shows the process sequence which concerns on charge communication control which concerns on Embodiment 2. FIG.

[Problems to be solved by the present disclosure]
The frequency used for wireless power transmission and the frequency of radio waves used in the keyless entry system and the like are very close, and the frequency bands partially overlap. Therefore, when the vehicle door is operated during wireless power transmission, there is a problem that the above-described vehicle communication system does not operate normally. That is, there is a risk that locking / unlocking of the vehicle door is not performed, or the responsiveness of locking / unlocking may be deteriorated.
The same problem also occurs in other vehicle communication systems that use radio waves in the LF band, for example, systems that monitor the air pressure of tires by two-way communication, and there has been a problem that tire air pressure monitoring can not be performed normally. .

Patent Document 1 discloses a technique for temporarily stopping non-contact power feeding in response to a wake signal periodically transmitted to search for an electronic key in the non-contact charger of a portable terminal. There is. However, the wireless power transmission apparatus that transmits power wirelessly to a vehicle equipped with a battery for driving a vehicle is significantly different from the basic configuration, and does not disclose specific means for solving the problems of the present application. Moreover, since it is the structure which stops non-contact electric power feeding according to the wake signal transmitted regularly, power transmission can not be performed efficiently, but there exists a possibility that charge time may become long.

The object of the present disclosure is to provide a charge communication control device, a vehicle-mounted device, a charge communication control system, and the like, which can control charge communication such that power transmission by a wireless power transmission device does not adversely affect a communication system mounted on a vehicle. A charge communication control method is provided.

[Effect of the present disclosure]
According to the present disclosure, a charge communication control device capable of controlling charge communication such that power transmission by a wireless power transmission device does not adversely affect a communication system mounted on a vehicle, in-vehicle device, charge communication control system, and It is possible to provide a charge communication control method.

Description of an embodiment of the present invention
First, the embodiments of the present invention will be listed and described. In addition, at least a part of the embodiments described below may be arbitrarily combined.

(1) The charge communication control device according to this aspect relates to charge control between a wireless power transmission device that charges the battery by transmitting power without contact to a vehicle equipped with a battery for driving a vehicle. A charge communication control apparatus for communicating information, comprising: a frequency band used for power transmission by the wireless power transmission apparatus; and a frequency band of a signal transmitted from an antenna provided in the vehicle to a communicator for the vehicle A wireless transmission unit for transmitting to the wireless power transmission apparatus a stop request signal requesting stop of power transmission by the wireless power transmission apparatus when the antenna transmits a signal to the communication apparatus. Prepare.

The antenna provided in the vehicle constitutes a communication system different from the wireless power transmission system, and a signal is wirelessly transmitted from the antenna to a communicator for the vehicle. However, since the frequency band used when transmitting a signal from the antenna and the frequency band used for power transmission by the wireless power transmission apparatus partially overlap, the vehicle is affected by the wireless power transmission. And there is a possibility that communication between communication devices becomes impossible. Therefore, when a signal is transmitted from the antenna to the communication device, the charging communication control device transmits a stop request signal to the wireless power transmission device to stop the wireless power transmission.
Thus, adverse effects of wireless power transfer on the communication between the vehicle and the communicator can be avoided.

(2) The on-vehicle device for transmitting a signal from the antenna to the communication device includes a predetermined signal receiving unit for receiving a predetermined signal to be transmitted when the signal is transmitted, and the wireless transmission unit is connected to the predetermined signal receiving unit. Preferably, when the predetermined signal is received, the stop request signal is transmitted to the wireless power transmission apparatus.

According to this aspect, the vehicle-mounted device for transmitting a signal from the antenna transmits a predetermined signal to the charging communication control device when transmitting the signal, and the charging communication control device responds to the predetermined signal by the wireless power transmission device Stop power transfer. Thus, the wireless power transmission can be stopped when a signal is transmitted from the antenna.

(3) A stop signal transmission unit for transmitting a stop signal indicating that the power transmission has been stopped to the on-vehicle device when the stop of the power transmission is confirmed by performing communication with the wireless power transmission device The configuration provided is preferable.

According to this aspect, the charging communication control device confirms that the power transmission by the wireless power transmission device is stopped, and transmits a stop signal indicating that the wireless power transmission is stopped to the in-vehicle device. The in-vehicle device can use the stop signal indicating that the wireless power transmission has been stopped to timing the signal to be transmitted from the antenna.

(4) The wireless power transmitting apparatus further comprises a completion signal receiving unit for receiving a completion signal transmitted by the in-vehicle apparatus after transmitting a signal from the antenna to the communication apparatus, the wireless transmission unit receiving the completion signal, the wireless power It is preferable that the resumption request signal for requesting resumption of power transmission by the transmission device be transmitted to the wireless power transmission device.

According to this aspect, when the charge communication control device receives the completion signal transmitted from the in-vehicle device that has transmitted the signal to the communication device for the vehicle, the resumption signal for resuming power transmission by the wireless power transmission device is wireless power Transmit wirelessly to the transmission device. Therefore, the power transmission by the wireless power transmission apparatus can be resumed after the completion of the signal transmission from the in-vehicle device to the communication device, and the wireless power transmission is prevented from adversely affecting the communication between the vehicle and the communication device. be able to.

(5) The vehicle-mounted device according to this aspect detects the position of the communication device carried by the user when a locking / unlocking operation or an engine start operation of a door of a vehicle equipped with a battery for driving a vehicle is performed. An on-vehicle device for transmitting a signal from an antenna provided in the vehicle, wherein a frequency band used for power transmission by a wireless power transmission device for charging the battery by transmitting power without contact to the vehicle The power transmission by the wireless power transmission apparatus is stopped when the frequency band of the signal transmitted from the antenna partially overlaps and the locking / unlocking operation of the door of the vehicle or the engine start operation is performed. And a predetermined signal transmission unit for transmitting a predetermined signal of

According to this aspect, the frequency band used when transmitting the signal for detecting the position of the communication device from the antenna and the frequency band used for the power transmission by the wireless power transmission apparatus partially overlap Therefore, there is a possibility that communication between the vehicle and the communicator becomes impossible due to the influence of power transmission. Therefore, when a signal is transmitted from the antenna provided in the vehicle to the communication device, the charging communication control device transmits a stop request signal to the wireless power transmission device to stop the wireless power transmission.
Therefore, the wireless power transmission can be prevented from adversely affecting communication between the in-vehicle device and the communication device, and the in-vehicle device can transmit a signal for detecting the position of the communication device to the communication device. .

(6) The in-vehicle device according to the present embodiment is provided in a tire of a vehicle equipped with a battery for driving a vehicle, and transmits information of air pressure to a communication device that wirelessly transmits a tire pressure signal obtained by detecting the air pressure of the tire. A vehicle-mounted device that transmits a request signal for requesting from an antenna provided in the vehicle, and receives the tire pressure signal transmitted from the communication device in response to the request signal to monitor the air pressure of the tire And a frequency band used for power transmission by the wireless power transmission apparatus that charges the battery by transmitting power without contact to the vehicle, and a frequency band of a signal transmitted from the antenna partially overlap And transmitting a predetermined signal for stopping power transmission by the wireless power transmission apparatus prior to transmission of the request signal to the communication device. A transmitting unit.

According to this aspect, the frequency band used when transmitting a signal for requesting transmission of a tire pressure signal from the antenna partially overlaps the frequency band used for power transmission by the wireless power transmission apparatus Therefore, there is a possibility that communication between the vehicle and the communicator becomes impossible due to the influence of power transmission. Therefore, when a signal is transmitted from the antenna provided in the vehicle to the communication device, the charging communication control device transmits a stop request signal to the wireless power transmission device to stop the wireless power transmission.
Thus, the wireless power transmission can be prevented from adversely affecting communication between the in-vehicle device and the communication device, and the in-vehicle device can request the communication device to transmit a tire pressure signal.

(7) The charge communication control system according to the present aspect includes the charge communication control device according to any one of the aspects (1) to (4) and a communication carried by a user and receiving a signal transmitted from the antenna And an in-vehicle device for transmitting a signal for detecting the position of the communication device from the antenna when the locking and unlocking operation of the door of the vehicle or the engine start operation is performed, the communication device comprising The signal for position detection transmitted from the in-vehicle device is received, and the response signal according to the received signal is transmitted, and the in-vehicle device receives the response signal transmitted from the communication device to receive the communication. Position detection of the machine is performed, and in accordance with the position detection result, the door lock / unlock or start of the engine is instructed.

Similar to the aspect (5), it is possible to avoid that the wireless power transmission adversely affects the communication between the in-vehicle device and the communication device, and the in-vehicle device transmits a signal for detecting the position of the communication device to the communication device can do.

(8) The charge communication control system according to the present aspect includes the charge communication control device of aspect (4), a communication device carried by a user and receiving a signal transmitted from the antenna, and locking and unlocking of the door of the vehicle And a vehicle-mounted device for transmitting a signal for detecting the position of the communication device from the antenna when the operation or the engine start-up operation is performed, the vehicle-mounted device includes locking / unlocking operation of the door or engine starting operation A predetermined signal transmission unit that transmits the predetermined signal to the charging communication control device, a stop signal reception unit that receives the stop signal transmitted from the charging communication control device, and the stop signal reception unit; When the stop signal is received, the position detection signal transmission unit for transmitting a signal for detecting the position of the communication device from the antenna, and the position of the communication device when the position of the communication device is detected A completion signal transmission unit for transmitting a completion signal, and the communication device receives a position detection signal transmitted from the in-vehicle device, and transmits a response signal according to the received signal. The in-vehicle device detects the position of the communication device by receiving the response signal transmitted from the communication device, and instructs locking / unlocking of the door or start of the engine according to the result of the position detection.

According to this aspect, when transmitting a signal for detecting the position of the communication device from the antenna, the on-vehicle device stops the power transmission by the wireless power transmission apparatus, confirms the stop of the wireless power transmission, and then confirms the signal. Can be sent. In addition, power transmission by the wireless power transmission apparatus can be resumed after position detection of the communication device or after transmitting a signal to the communication device.
Therefore, it is possible to reliably prevent the wireless power transmission from adversely affecting the communication between the vehicle and the communication device, and to shorten the stop time of the power transmission by the wireless power transmission apparatus.

(9) The charge communication control system according to the present aspect is provided to the charge communication control device according to any one of the aspects (1) to (4) and the tire of the vehicle, and is provided to the vehicle A communication device wirelessly transmits a tire pressure signal obtained by detecting the air pressure of the tire when a signal transmitted from an antenna is received, and a signal for requesting transmission of the tire pressure signal from the antenna is transmitted. And an in-vehicle device that receives the tire pressure signal transmitted from the communication device in response to the signal and monitors the air pressure of the tire.

Similarly to the aspect (6), it is possible to avoid that the wireless power transmission adversely affects the communication between the in-vehicle device and the communication device, and the in-vehicle device can request the communication device to transmit a tire pressure signal.

(10) The charge communication control system according to the present aspect is provided to the charge communication control device of aspect (4) and the tire of the vehicle, and when the signal transmitted from the antenna is received, the pneumatic pressure of the tire And a signal for requesting transmission of the tire pressure signal from the antenna provided on the vehicle. The communication device transmits the signal from the communication unit according to the signal. A vehicle-mounted device for receiving the tire pressure signal to be transmitted and monitoring the air pressure of the tire, the vehicle-mounted device transmitting a predetermined signal to the charge communication control device, and the charge communication A stop signal receiving unit for receiving the stop signal transmitted from the control device, and the tire air pressure signal from the antenna when the stop signal is received by the stop signal receiving unit When a signal for requesting transmission of the tire air pressure signal is transmitted from an antenna provided in the vehicle, or a tire air pressure signal is received And a completion signal transmission unit for transmitting the completion signal, the tire air pressure signal received from the communication device in response to a signal for requesting transmission of the tire air pressure signal, and the tire pressure of the tire Monitor

According to this aspect, when transmitting a signal for requesting transmission of a tire pressure signal from the antenna, the on-vehicle device stops power transmission by the wireless power transmission apparatus and confirms that the wireless power transmission has been stopped before the signal is transmitted. Can be sent. In addition, power transmission by the wireless power transmission device can be resumed after receiving the tire pressure signal or after transmitting the signal to the communication device.
Therefore, the tire air pressure signal can be received without any adverse effect of the wireless power transmission on the communication between the vehicle and the communication device, and the stop time of the power transmission by the wireless power transmission device can be shortened. .

(11) The charge communication control method according to the present aspect relates to charge control between a wireless power transmission device that charges the battery by transmitting power without contact to a vehicle equipped with a battery for driving a vehicle. A charge communication control method for communicating information, comprising: a frequency band used for power transmission by the wireless power transmission device; and a frequency band of a signal transmitted from an antenna provided in the vehicle to a vehicle communication device. , And when the antenna transmits a signal to the communication device, the wireless power transmission apparatus transmits to the wireless power transmission apparatus a stop request signal for requesting to stop the power transmission by the wireless power transmission apparatus; When stop of power transmission is confirmed by performing communication with the transmission apparatus, a stop signal indicating that power transmission is stopped is transmitted.

As in the aspect (1), it is possible to avoid that the wireless power transmission adversely affects the communication between the vehicle and the communication device.

Details of the Embodiment of the Present Invention
Specific examples of a charge communication control device, an in-vehicle device, a charge communication control system, and a charge communication control method according to an embodiment of the present invention will be described based on the drawings. The present invention is not limited to these exemplifications, is shown by the claims, and is intended to include all modifications within the scope and meaning equivalent to the claims. In addition, at least a part of the embodiments described below may be arbitrarily combined.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration example of a charge communication control system according to a first embodiment. The charge communication control system of the first embodiment includes a charge communication control device 1 and a charge ECU 2 mounted on a vehicle C, and a wireless power transmission device 3 installed at a charge station.

The wireless power transmission device 3 includes a wireless power transmission control unit 31 and a transmission pad 32 for transmitting power without contact to a vehicle C such as a hybrid vehicle or an electric vehicle equipped with a battery 4 for driving the vehicle. Wireless charging device. The wireless power transmission device 3 has a function of performing wireless communication with the charging communication control device 1, and may stop the wireless power transmission in response to a request from the charging communication control device 1, and resume the stopped wireless power transmission. it can. In addition, the wireless power transmission device 3 can transmit a signal indicating that wireless power transmission has been stopped to the charging communication control device 1 in response to a request.
Vehicle C is provided with power reception pad 5 for receiving the power transmitted from power transmission pad 32, and battery 4 is charged with the power received by power reception pad 5.

The vehicle C is provided with an inlet 6 to which a charging gun of another charging device (not shown) is connected. The said charging apparatus is an apparatus equipped with the charge cable by which the charge gun was provided in the front-end | tip part, and charging the battery 4 by transmitting direct-current power to the vehicle C via a charge cable. The charging device conforms to, for example, a combo system, and the charging cable includes a feed line for transmitting power, a control line for transmitting a control pilot (CLPT) signal, and a reference potential line.
The inlet 6 is connected to the in-vehicle feed line 61, the in-vehicle control line 62, and the in-vehicle reference potential line 63 (see FIG. 2), and the charge gun is connected to the inlet 6 to feed the charging cable. The reference potential line is electrically connected to the in-vehicle feed line 61, the in-vehicle control line 62, and the in-vehicle reference potential line 63.
The in-vehicle feed line 61 is connected to the battery 4, and the battery 4 is charged with the power transmitted from the charging device through the feed line of the charging cable.
The in-vehicle control line 62 and the in-vehicle reference potential line 63 are connected to the charge ECU 2 via the charge communication control device 1. The control pilot signal is, for example, a rectangular wave signal of 1 kHz, and the charging device and the charging ECU 2 check the connection of the charging device and the vehicle C depending on the potential of the rectangular wave signal with respect to the reference potential, presence or absence of the rectangular wave signal, , Transmit and receive information related to charging, such as charging status.
Further, the charging device has a function of performing wired communication with the charging communication control device 1 by PLC communication using a feed line.

The charge ECU 2 uses the charge communication control device 1 to transmit and receive information necessary for charge control between the wireless power transmission device 3 and the charge device. For example, when charging of the battery 4 is started, the charging ECU 2 transmits information of the battery 4 to the charging communication control device 1. The charge communication control device 1 receives the information transmitted from the charge ECU 2, converts the received information into a predetermined communication protocol, and transmits the information to the wireless power transmission device 3 and the charge device wirelessly or by wire. When the charge communication control device 1 receives the information transmitted wirelessly or by wire from the wireless power transmission device 3 and the charge device, the charge communication control device 1 converts the received information into a communication protocol, and transmits it to the charge ECU 2.
The charge ECU 2 manages the state of the battery 4 while communicating with the wireless power transmission device 3 through the charge communication control device 1, and controls power transmission or charge from the power receiving pad 5 to the battery 4.
Further, the charge ECU 2 manages the state of the battery 4 while communicating with the charge device through the charge communication control device 1 and controls power transmission or charge to the battery 4 by the charge device.

FIG. 2 is a block diagram showing a configuration example of the charge communication control device 1 according to the first embodiment. The charge communication control device 1 includes a wireless communication unit 11 that performs wireless communication with the wireless power transmission device 3 and a PLC communication unit 12 that performs wired communication, for example, PLC communication, with the charging device, and a CAN communication unit 13 And the control unit 14.

The control unit 14 is a computer having a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), an input / output interface and the like, and executes the control program not shown. And control communication by the PLC communication unit 12 and the CAN communication unit 13.

The wireless communication unit 11 is a circuit that performs wireless communication with the wireless power transmission apparatus 3 in accordance with a predetermined wireless LAN standard, and the wireless communication is controlled by the control unit 14.

The PLC communication unit 12 is connected to the in-vehicle control line 62 and the in-vehicle reference potential line 63, and transmits and receives information on charging to and from the vehicle C using the in-vehicle control line 62 and the in-vehicle reference potential line 63. The PLC communication unit 12 communicates with the charging apparatus by superimposing a differential signal having a frequency higher than that of the control pilot signal, for example, a differential signal of 2 to 30 MHz, on the control pilot signal. The wired communication by the PLC communication unit 12 is controlled by the control unit 14.

The PLC communication unit 12 includes a coupling capacitor 12a and a coupling transformer 12b for separating the differential signal superimposed on the control pilot signal from the control pilot signal, and a communication circuit 12c for transmitting and receiving the differential signal.
The in-vehicle control line 62 and the in-vehicle reference potential line 63 are connected to the coupling transformer 12b via the coupling capacitor 12a. The coupling capacitor 12a has a high impedance for the control pilot signal and a low impedance for the differential signal. As the coupling capacitor 12a, for example, a capacitor having a capacitance of 1 nF is used.
The coupling transformer 12 b has a primary coil and a secondary coil magnetically coupled to the primary coil. An in-vehicle control line 62 and an in-vehicle reference potential line 63 are connected to both ends of the primary coil via a coupling capacitor 12 a. Both ends of the secondary coil are connected to the communication circuit 12c. The communication circuit 12c has a band pass filter for blocking signals outside the frequency band of differential signals, and receives the differential signal separated by the coupling capacitor 12a and the coupling transformer 12b and passed through the band pass filter. Do. Further, the communication circuit 12c transmits a differential signal by giving a signal to be transmitted to the secondary coil.
PLC communication can transmit and receive more information than control pilot signals.

The CAN communication unit 13 is connected to the charge ECU 2 via a CAN communication line 10. The CAN communication unit 13 communicates with the charge ECU 2 in accordance with the CAN-FD standard to receive information necessary for charging, such as battery information, from the charge ECU 2, and the received information as the wireless communication unit 11 or Give to the PLC communication unit 12. When the wireless communication unit 11 communicates with the wireless power transmission device 3, the wireless communication unit 11 wirelessly transmits the information received by the CAN communication unit 13 to the wireless power transmission device 3. When the PLC communication unit 12 communicates with the charging device, the PLC communication unit 12 transmits the information received by the CAN communication unit 13 to the charging device by PLC communication.
When the wireless communication unit 11 receives information necessary for charge control from the wireless power transmission apparatus 3, the wireless communication unit 11 provides the information to the CAN communication unit 13. Similarly, when the PLC communication unit 12 receives information necessary for charge control from the charging device, the PLC communication unit 12 provides the information to the CAN communication unit 13. The CAN communication unit 13 transmits the information given from the wireless communication unit 11 or the PLC communication unit 12 to the charging ECU 2.
Furthermore, the CAN communication unit 13 can perform various communications with other ECUs such as a vehicle-mounted device and an engine ECU.

On the other hand, the vehicle C is equipped with a vehicle door locking / unlocking system.
FIG. 3 is a block diagram showing a configuration example of a locking and unlocking system for a vehicle C door according to the first embodiment. The communication system for vehicle C according to the first embodiment is between the in-vehicle device 7 which transmits and receives various signals using the plurality of LF transmission antennas 70 and the RF receiving antenna 7 a provided in the vehicle C, and the in-vehicle device 7. And a portable device 9 for transmitting and receiving signals.

The plurality of LF transmission antennas 70 are disposed, for example, at a pillar on the driver's side, a pillar on the passenger's side, and at the front and rear of the vehicle C. The LF transmitting antenna 70 provided on the driver side pillar and the passenger side pillar is an antenna outside the vehicle that mainly transmits signals to the outside of the vehicle, and the LF transmitting antenna 70 provided on the front and rear of the vehicle C is , It is an in-vehicle antenna that mainly transmits signals into the vehicle. Each LF transmission antenna 70 transmits signals using radio waves in the LF band. The LF band is an example of a radio wave band used when performing wireless communication, and is not necessarily limited to this.

The in-vehicle device 7 according to the first embodiment sequentially transmits a request signal for detecting the position of the portable device 9 and a signal for position detection from the plurality of LF transmission antennas 70 using a wireless signal. The portable device 9 receives the request signal and the position detection signal transmitted from each LF transmission antenna 70, and measures the reception signal strength of each received position detection signal. The portable device 9 transmits a response signal including the measured received signal strength, its own key identifier and the like to the on-vehicle device 7 using a radio wave of UHF (Ultra High Frequency) band. The in-vehicle device 7 receives the response signal transmitted from the portable device 9, compares the information such as the key identifier included in the received response signal, and specifies the position of the portable device 9 based on the received signal strength. And execute predetermined processing according to the position of the portable device 9.

For example, the in-vehicle device 7 performs position confirmation and authentication of the portable device 9 and executes the following process. When the request switch 75a (see FIG. 4) provided on the vehicle door is operated, the on-vehicle device 7 wirelessly communicates with the portable device 9 to determine whether the portable device 9 is inside the vehicle, When the portable device 9 is outside the vehicle, processing for locking or unlocking the vehicle door is performed.
Furthermore, when the engine start switch 75c (see FIG. 4) is operated, the in-vehicle device 7 wirelessly communicates with the portable device 9 to determine whether the portable device 9 is in the vehicle or not. If the vehicle is in the vehicle, processing for starting the engine mounted on the vehicle C is executed.

FIG. 4 is a block diagram showing a configuration example of the on-vehicle device 7 according to the first embodiment. The in-vehicle device 7 includes an in-vehicle control unit 71 that controls the operation of each component of the in-vehicle device 7. The on-vehicle control unit 71 includes a storage unit 72, an on-vehicle reception unit 73, an on-vehicle transmission unit 74, an input / output unit 75, and a CAN communication unit 76.

The on-vehicle control unit 71 is a microcomputer having, for example, one or more CPUs, a multi-core CPU, a ROM, a RAM, an input / output interface, a timer, and the like. The CPU of the in-vehicle control unit 71 is connected to the storage unit 72, the in-vehicle reception unit 73, the in-vehicle transmission unit 74, the input / output unit 75, and the CAN communication unit 76 via an input / output interface. The in-vehicle control unit 71 controls the operation of each component by executing a control program described later stored in the storage unit 72, and executes processing such as position detection and locking / unlocking of the portable device 9.

The storage unit 72 is a non-volatile memory such as an EEPROM (Electrically Erasable Programmable ROM) or a flash memory. The storage unit 72 stores a control program for executing processing such as position detection and locking / unlocking of the portable device 9 by the in-vehicle control unit 71 controlling the operation of each component of the in-vehicle device 7.

An RF receiving antenna 7 a is connected to the in-vehicle receiving unit 73. The on-vehicle receiving unit 73 receives a response signal and the like transmitted by wireless from the portable device 9 through the RF receiving antenna 7a. The on-vehicle reception unit 73 is a circuit that removes the component of the carrier wave from the received response signal or the like to extract the reception signal, and outputs the extracted reception signal to the on-vehicle control unit 71. Although a UHF band radio wave of 300 MHz to 3 GHz is used as a carrier wave, it is not limited to this frequency band.

The on-vehicle transmission unit 74 is a circuit that modulates a signal output from the on-vehicle control unit 71 into a wireless signal using a carrier wave, and transmits the signal to the portable device 9 from each LF transmission antenna 70. Specifically, the on-vehicle transmission unit 74 transmits a position detection signal for detecting the position of the portable device 9 from each LF transmission antenna 70 according to the control of the on-vehicle control unit 71. Although a 30 kHz to 300 kHz LF band is used as a carrier wave, it is not limited to this frequency band.

Further, to the input / output unit 75, a request switch 75a, a locking / unlocking unit 75b, and an engine start switch 75c are connected.

The request switch 75a is, for example, a switch for locking or unlocking the vehicle door on the driver's seat side or the passenger's seat side, and is provided on a door handle on the driver's seat outside or the passenger's seat outside. A request signal according to the operation state of the request switch 75a is input to the input / output unit 75, and the on-vehicle control unit 71 can recognize the operation state of the request switch 75a based on the input request signal.

The locking and unlocking unit 75 b includes a locking mechanism that locks and unlocks each door, and an actuator that drives the locking mechanism. The on-vehicle control unit 71 outputs a locking drive signal or an unlocking drive signal to the actuator of each door when a predetermined condition is satisfied. The locking and unlocking unit 75b locks or unlocks each door according to a locking drive signal or an unlocking drive signal. For example, when the request switch 75a is operated, the on-vehicle control unit 71 performs wireless communication with the portable device 9 to detect the position of the portable device 9, and the authorized portable device 9 is in the vicinity of the request switch 75a outside the vehicle. When it is positioned, a locking drive signal or an unlocking drive signal is output to the locking and unlocking unit 75b.

The engine start switch 75 c is a push button switch for starting and stopping the engine mounted on the vehicle C. The start signal according to the operation state of the engine start switch 75c is input to the input / output unit 75, and the on-vehicle control unit 71 can recognize the operation state of the engine start switch 75c by the input start signal. it can.

The engine ECU 8 is a device that controls the operation of the engine, and the on-vehicle control unit 71 can control the start and stop of the engine by outputting an engine start signal and an engine stop signal to the engine ECU 8. Further, the on-vehicle control unit 71 can recognize the state of the engine based on the signal output from the engine ECU 8.

The charge communication control device 1 and the engine ECU 8 are connected to the CAN communication unit 76. The CAN communication unit 76 communicates with the charge communication control device 1 in accordance with the CAN-FD standard, whereby the on-vehicle control unit 71 requests power transmission stop by the wireless power transmission device 3, stop confirmation, and charging. A resumption request can be made.

FIG. 5 is a block diagram showing a configuration example of the portable device 9 according to the first embodiment. The portable device 9 includes a portable control unit 91 that controls the operation of each component of the portable device 9. The mobile control unit 91 is a microcomputer having, for example, one or more CPUs, a multi-core CPU, and the like. In the mobile control unit 91, a mobile storage unit 92, a mobile reception unit 93, a received signal strength measurement unit 94, and a mobile transmission unit 95 are provided.

The portable control unit 91 reads a control program for portable device described later stored in the portable storage unit 92 and controls the operation of each component to control the operation of each component. A process of transmitting information necessary for the position detection of the machine 9 to the on-vehicle machine 7 as a response signal is executed.

The portable storage unit 92 is a non-volatile memory similar to the storage unit 72. The portable storage unit 92 transmits a response signal including information for detecting the position of the portable unit 9 to the on-vehicle unit 7 by the portable control unit 91 controlling the operation of each component of the portable unit 9. Stores a portable device control program for executing the program.

The portable reception unit 93 is connected to the LF reception antenna 93 a, receives various signals such as a request signal and a signal for position detection transmitted from the in-vehicle device 7 using radio waves in the LF band, and outputs the signals to the portable control unit 91. Do. The LF reception antenna 93a is, for example, a three-axis antenna, and a constant received signal strength can be obtained regardless of the orientation or posture of the portable device 9 with respect to the vehicle C.

The reception signal strength measurement unit 94 is a circuit that detects the reception signal strength of the signal transmitted from the plurality of LF transmission antennas 70 and received by the LF reception antenna 93a, and outputs the detected reception signal strength to the portable control unit 91. .

The portable transmission unit 95 is connected to the RF transmission antenna 95 a, and transmits a request signal transmitted from the portable device 9 and a response signal to the position detection signal according to the control of the portable control unit 91. When the portable device 9 receives the position detection signal, the portable transmission unit 95 receives the received signal strength measurement unit 94 as information for detecting the position of the portable device 9 with respect to the on-vehicle device 7 under the control of the portable control unit 91. A response signal including the measured received signal strength is transmitted. The portable transmission unit 95 transmits a response signal using radio waves in the UHF band. The UHF band is an example of a radio wave band for transmitting a signal, and is not necessarily limited to this.

FIG. 6 is a flowchart showing a processing procedure according to the charge communication control according to the first embodiment. First, the in-vehicle control unit 71 monitors the operation state of the request switch 75a, and determines whether or not the locking and unlocking operation has been performed (step S51). If it is determined that the locking and unlocking operation has not been performed (step S51: NO), the in-vehicle control unit 71 ends the process.

If it is determined that the locking and unlocking operation has been performed (step S51: YES), the in-vehicle control unit 71 causes the CAN communication unit 76 to transmit a predetermined signal to the charge communication control device 1 (step S52).

The control unit 14 of the charge communication control device 1 receives the predetermined signal transmitted from the in-vehicle device 7 at the CAN communication unit 13 (step S53). The control unit 14 having received the predetermined signal transmits a stop request signal requesting stop of power feeding to the wireless power transmission apparatus 3 by the wireless communication unit 11, and similarly stops the stop request signal via the CAN communication line 10. It transmits to charge ECU 2 (step S54). The wireless power transmission apparatus 3 having received the stop request signal stops wireless power transmission.

Next, the control unit 14 performs wireless communication with the wireless power transmission apparatus 3 in the wireless communication unit 11, and communicates with the charge ECU 2 via the CAN communication line 10 to determine whether or not power transmission is stopped. (Step S55). When it is determined that the power transmission is not stopped (step S55: NO), the control unit 14 returns the process to step S55, and stands by until the power transmission is stopped. When it is determined that the power transmission is stopped (step S55: YES), the control unit 14 transmits a stop signal indicating that the power transmission is stopped to the on-vehicle device 7 by the CAN communication unit 13 (step S56) .

The on-vehicle device 7 receives the stop signal transmitted from the charge communication control device 1 at the CAN communication unit 76 (step S57). The in-vehicle control unit 71 having received the stop signal transmits a request signal for detecting the position of the portable device 9 and a position detection signal from the LF transmission antenna 70 (step S58), and responds to the request signal and the position detection signal. Then, the response signal transmitted from the portable device 9 is received (step S59). Then, the on-vehicle control unit 71 performs collation to determine whether the portable device 9 is a legitimate device based on a key identifier or the like included in the received response signal (step S60). It is determined whether or not the portable device 9 is near the vehicle door where the request switch 75a is operated (step S61). When it is determined that the portable device 9 is normal and located near the vehicle door (step S61: YES), the on-vehicle control unit 71 transmits a locking and unlocking signal to the locking and unlocking unit 75b to lock and unlock the vehicle door ( Step S62).

When the locking / unlocking process of the vehicle door is finished, or when it is determined that the portable device 9 is not normal at step S61 or the portable device 9 is not near the vehicle door (step S61: NO), the on-vehicle controller 71 transmits a completion signal indicating that the process related to the position detection of the portable device 9 is completed to the charge communication control device 1 by the CAN communication unit 13 (step S63).

The control unit 14 of the charge communication control device 1 receives the completion signal transmitted from the on-vehicle control unit 71 at the CAN communication unit 76 (step S64). The control unit 14 having received the completion signal wirelessly transmits a restart signal for resuming power transmission by the wireless power transmission apparatus 3 in the wireless communication unit 11, and charges the same restart signal via the CAN communication line 10. It transmits to ECU2 (step S65), and ends processing. The wireless power transmission apparatus 3 having received the resume signal resumes the wireless power transmission.

According to the charging communication control system configured as described above, it is possible to prevent the wireless power transmission device 3 from adversely affecting communication between the on-vehicle device 7 and the portable device 9.
When the wireless power transmission device 3 is performing power transfer, when the request switch 75a is operated, the on-vehicle device 7 transmits the signal of the LF band to the portable device 9, and the frequency band of the signal of the LF band is Communication may be adversely affected because it is close to the frequency band used for power transmission. Therefore, the charge communication control device 1 according to the first embodiment temporarily stops wireless power transmission by transmitting a stop request signal to the wireless power transmission device 3. Then, the in-vehicle device 7 communicates with the portable device 9.
Therefore, as described above, the in-vehicle device 7 and the portable device 9 can communicate normally, and the in-vehicle device 7 can lock and unlock the vehicle door without delay according to the operation of the request switch 75a.

Also, the on-vehicle device 7 transmits a predetermined signal to the charging communication control device 1 before transmitting the signal of the LF band, and the charging communication control device 1 wirelessly transmits the stop request signal when the predetermined signal is received. Is configured. Therefore, when the on-vehicle device 7 transmits a signal to the portable device 9, the power transmission by the wireless power transmission device 3 can be reliably stopped. Therefore, it is possible to more reliably prevent the wireless power transmission device 3 from adversely affecting communication between the on-vehicle device 7 and the portable device 9.

Furthermore, the charge communication control device 1 confirms that the power transmission by the wireless power transmission device 3 has been stopped, transmits a stop signal to the on-vehicle device 7, and the on-vehicle device 7 receives the stop signal. The band signal is transmitted to the portable device 9. Therefore, no signal is transmitted from the on-vehicle device 7 to the portable device 9 before the power transmission by the wireless power transmission device 3 is stopped, and the wireless power transmission device 3 adversely affects communication between the on-vehicle device 7 and the portable device 9 Can be avoided more reliably.

Furthermore, after completion of position detection and locking / unlocking processing of the portable device 9, the on-vehicle device 7 transmits a completion signal to the charge communication control device 1, and the charge communication control device 1 resumes when the completion signal is received. It is configured to wirelessly transmit the request signal. Therefore, the power transmission by the wireless power transmission device 3 can be reliably prevented from being resumed during the communication between the on-vehicle device 7 and the portable device 9. Therefore, it is possible to reliably avoid that the power transmission of the wireless power transmission device 3 adversely affects the communication between the on-vehicle device 7 and the portable device 9. Moreover, the period which stops the wireless power transmission by the wireless power transmission apparatus 3 can be shortened short.

In the first embodiment, the on-vehicle device 7 transmits the completion signal to the charge communication control device 1 at the timing when the locking and unlocking process is finished, but the transmission timing of the completion signal is limited to the timing. It is not a thing. For example, the on-vehicle device 7 may transmit the completion signal at the timing when the transmission of the request signal and the position detection signal is completed in step S58. By configuring in this way, it is possible to further shorten the stop time of the wireless power transmission.
In addition, the in-vehicle device 7 may transmit a completion signal at the timing at which the position of the portable device 9 has been detected.

In the first embodiment, an example in which the vehicle door is locked and unlocked by communication between the in-vehicle device 7 and the portable device 9 has been described. However, the present embodiment is not limited to the process of starting the engine according to the operation of the engine start switch 75c. Form 1 may be applied. Specifically, it is determined in step S51 whether or not the engine start switch 75c is operated, and in step S62, an engine start signal is transmitted to the engine ECU 8 when it is determined that the authorized portable device 9 is in the vehicle. It should be configured as follows.

Furthermore, although the example which detects the position of the portable device 9 by the RSSI (Received Signal Strength Indicator) system has been described in the first embodiment, the request signal is transmitted to a limited range near the vehicle door, and the request signal is transmitted. It may be configured to determine whether or not the portable device 9 is near the vehicle door based on the presence or absence of the response.

Second Embodiment
FIG. 7 is a block diagram showing a configuration example of a tire pressure monitoring system according to a second embodiment. The charging communication system according to the second embodiment differs from that of the first embodiment in that the in-vehicle device 7 constitutes a tire pressure monitoring system, and therefore the differences will be mainly described below. The other configurations and effects are the same as those of the embodiment, and therefore the corresponding portions are denoted by the same reference numerals and the detailed description will be omitted.

The tire pressure monitoring system includes an on-vehicle device 7 provided at an appropriate location of the vehicle body and a detection device 209 provided on each of the wheels of the plurality of tires T attached to the vehicle C.

A plurality of LF transmission antennas 270 corresponding to the respective tires T are connected to the in-vehicle device 7. For example, four LF transmission antennas 270 are provided at the right front, right rear, left rear and left front tire positions of the vehicle C. The tire position is a position of the tire house and its periphery, and is a position at which the detection device 209 provided in each tire T can separately receive the signal transmitted from each LF transmission antenna 270.

The LF band and the UHF band are examples of radio wave bands used when performing wireless communication, and the present invention is not necessarily limited thereto. A notification device (not shown) is connected to the in-vehicle device 7 via a communication line, and the in-vehicle device 7 transmits the acquired air pressure information to the notification device. The notification device receives the air pressure information transmitted from the in-vehicle device 7 and notifies the air pressure of each tire T. Further, the notification device issues a warning when the air pressure of the tire T is less than a predetermined threshold.

The in-vehicle device 7 has the same hardware configuration as that of the first embodiment. However, the notification device is connected to the input / output unit 75 of the in-vehicle apparatus 7 according to the second embodiment, and transmits information related to the air pressure of the tire T to the notification device. The storage unit 72 stores a control program and an identifier table for executing the tire pressure monitoring process by the control unit 14 controlling the operation of each component of the in-vehicle device 7. The identifier table stores the LF transmission antenna 270 provided at each tire position and the sensor identifier of the detection device 209 in association with each other.
The notification device is, for example, an audio device provided with a display unit or a speaker for notifying the information related to the air pressure of the tire T transmitted from the input / output unit 75 by an image or a sound, a display unit provided on an instrument of an instrument panel Etc. The display unit is a liquid crystal display, an organic EL display, a head-up display, or the like. For example, the notification device displays the air pressure of each tire T provided on the vehicle C in the form of an image or a character.

FIG. 8 is a block diagram showing a configuration example of a detection device 209 according to the second embodiment. The detection device 209 includes a sensor control unit 291 that controls the operation of each component of the detection device 209. The sensor control unit 291 is connected to a sensor storage unit 292, an air pressure signal transmission unit 293, a request signal reception unit 294, an air pressure detection unit 295, and a temperature detection unit 296.

The sensor control unit 291 is a microcomputer having, for example, one or more CPUs, a multi-core CPU, a ROM, a RAM, an input / output interface, and the like. The CPU of the sensor control unit 291 is connected to the sensor storage unit 292, the air pressure signal transmission unit 293, the request signal reception unit 294, the air pressure detection unit 295, and the temperature detection unit 296 via an input / output interface. The sensor control unit 291 reads the control program stored in the sensor storage unit 292 and controls each unit. The detection device 209 includes a battery (not shown) and operates with power from the battery.

The sensor storage unit 292 is a non-volatile memory. A control program for the CPU of the sensor control unit 291 to perform processing related to detection and transmission of the air pressure of the tire T is stored in the sensor storage unit 292. Also, a unique sensor identifier for identifying itself and the other detection device 209 is stored.

The air pressure detection unit 295 includes, for example, a diaphragm, and detects the air pressure of the tire T based on the amount of deformation of the diaphragm that changes according to the magnitude of pressure. The air pressure detection unit 295 outputs a signal indicating the detected air pressure of the tire T to the sensor control unit 291.

The temperature detection unit 296 includes, for example, an element whose electric resistance changes with temperature, and detects the temperature of the tire T based on the voltage between the elements which changes with temperature change. The temperature detection unit 296 outputs a signal indicating the detected temperature of the tire T to the sensor control unit 291.

An RF transmission antenna 293 a is connected to the air pressure signal transmission unit 293. The air pressure signal transmission unit 293 modulates the air pressure signal generated by the sensor control unit 291 into a signal in the UHF band, and transmits the modulated air pressure signal using the RF transmission antenna 293a. The air pressure signal transmission unit 293 further includes an RF signal strength change unit 23 b that changes the signal level of the air pressure signal to be transmitted. The RF signal strength changing unit 23 b is, for example, an amplifier, and changes the signal strength of the air pressure signal in accordance with the control signal output from the sensor control unit 291.

An LF reception antenna 294 a is connected to the request signal reception unit 294. The request signal reception unit 294 receives various signals such as a request signal transmitted from the on-vehicle device 7 using radio waves of the LF band by the LF reception antenna 294 a and outputs the received signals to the sensor control unit 291.

The sensor control unit 291 acquires a signal indicating the air pressure and temperature of the tire T from the air pressure detection unit 295 and the temperature detection unit 296 by executing a control program, and detects air pressure information and temperature information based on the signal and a detection device An air pressure signal including a sensor identifier and the like unique to 209 is generated and output to the air pressure signal transmission unit 293.

FIG. 9 is a flowchart showing a processing procedure according to the charge communication control according to the second embodiment. First, the on-vehicle control unit 71 determines whether or not it is a predetermined timing at which the tire air pressure is detected and monitored (step S251). If it is determined that the predetermined timing is not reached (step S251: NO), the on-vehicle control unit 71 ends the process.

When it is determined that the predetermined timing is reached (step S251: YES), the in-vehicle control unit 71 causes the CAN communication unit 76 to transmit a predetermined signal to the charge communication control device 1 (step S252).

The control unit 14 of the charge communication control device 1 receives the predetermined signal transmitted from the in-vehicle device 7 at the CAN communication unit 13 (step S253). The control unit 14 having received the predetermined signal transmits a stop request signal requesting stop of power feeding to the wireless power transmission apparatus 3 by the wireless communication unit 11, and similarly stops the stop request signal via the CAN communication line 10. It transmits to charge ECU 2 (step S254).

Next, the control unit 14 performs wireless communication with the wireless power transmission apparatus 3 in the wireless communication unit 11, and communicates with the charge ECU 2 via the CAN communication line 10 to determine whether or not power transmission is stopped. (Step S255). If it is determined that the power transmission is not stopped (step S255: NO), the control unit 14 returns the process to step S255 and stands by until the power transmission is stopped. When it is determined that the power transmission is stopped (step S255: YES), the control unit 14 transmits a stop signal indicating that the power transmission is stopped to the on-vehicle device 7 by the CAN communication unit 13 (step S256) .

The on-vehicle device 7 receives the stop signal transmitted from the charge communication control device 1 at the CAN communication unit 76 (step S257). The on-vehicle controller 71 having received the stop signal transmits an air pressure request signal requesting transmission of a tire air pressure signal from the LF transmission antenna 270 of each tire position (step S258), and detects each detection device 209 according to the air pressure request signal. The tire pressure signal transmitted from the vehicle is received (step S259). And in-vehicle control part 71 performs air pressure monitoring processing based on the information contained in the received tire air pressure signal (Step S260). For example, the on-vehicle control unit 71 determines the presence or absence of an abnormality in the air pressure of each tire T, etc., and executes a warning process as necessary. Moreover, the presence or absence of tire rotation etc. is determined and the process which changes the correspondence of each tire position and a sensor identifier is performed.

Next, it is determined whether the tire pressure monitoring process has been completed (step S261). If it is determined that the tire pressure monitoring process has not been completed (step S261: NO), the control unit 14 returns the process to step S258 and continues monitoring the tire pressure.

If it is determined that the tire pressure monitoring process has been completed (step S261: YES), the in-vehicle control unit 71 causes the CAN communication unit 13 to use the completion signal indicating that the process on the in-vehicle device 7 is completed. It transmits to (step S262).

The control unit 14 of the charge communication control device 1 receives the completion signal transmitted from the on-vehicle control unit 71 at the CAN communication unit 76 (step S263). The control unit 14 having received the completion signal wirelessly transmits a restart request signal for resuming power transmission by the wireless power transmission apparatus 3 in the wireless communication unit 11, and similarly transmits a similar restart request signal via the CAN communication line 10. It transmits to charge ECU 2 (Step S264), and ends processing.

According to the charging communication control system configured as described above, it is possible to prevent the wireless power transmission device 3 from adversely affecting communication between the on-vehicle device 7 and the portable device 9.
In the tire air pressure monitoring process, the frequency band of the air pressure request signal of the LF band transmitted from the on-vehicle device 7 to the detection device 209 is close to the frequency band used for power transmission, and communication may be adversely affected. Therefore, the charge communication control device 1 according to the second embodiment temporarily stops power transmission by transmitting a stop request signal to the wireless power transmission device 3. Then, the in-vehicle device 7 communicates with the detection device 209.
Therefore, as described above, the on-vehicle device 7 and the detection device 209 can communicate normally, and the on-vehicle device 7 can detect and monitor the tire pressure without delay. The other effects and advantages are the same as in the first embodiment.

1 charge communication control device 2 charge ECU
Reference Signs List 3 wireless power transmission device 4 battery 5 receiving pad 6 inlet 7 in-vehicle device 7 a RF receiving antenna 8 engine ECU
9 portable device 10 CAN communication line 11 wireless communication unit 12 PLC communication unit 13 CAN communication unit 14 control unit 31 wireless power transmission control unit 32 transmission pad 70 LF transmission antenna 71 in-vehicle control unit 73 in-vehicle reception unit 74 in-vehicle transmission unit 75 input / output Unit 75a Request switch 75b Locking / unlocking unit 75c Engine start switch 76 CAN communication unit 91 Mobile control unit 92 Mobile storage unit 93 Mobile reception unit 93a LF reception antenna 94 Received signal strength measurement unit 95 Mobile transmission unit 95a RF transmission antenna 61 In-car feeder 62 In-vehicle control line 63 In-vehicle reference potential line 209 Detection device 270 LF transmission antenna 291 Sensor control unit 292 Sensor storage unit 293 Air pressure signal transmission unit 293a RF transmission antenna 294 Request signal reception unit 294a LF reception antenna 295 Air Detector 296 temperature detector C vehicles

Claims (11)

1. A charge communication control device for communicating information related to charge control with a wireless power transmission device that charges a battery by transmitting power without contact to a vehicle equipped with a battery for driving a vehicle.
   A frequency band used for power transmission by the wireless power transmission apparatus partially overlaps a frequency band of a signal transmitted from an antenna provided on the vehicle to a communication device for the vehicle.
   A charging communication control device, comprising: a wireless transmission unit that transmits a stop request signal requesting stop of power transmission by the wireless power transmission device to the wireless power transmission device when the antenna transmits a signal to the communication device.
2. The vehicle-mounted device which transmits a signal from the antenna to the communication device includes a predetermined signal receiving unit that receives a predetermined signal to be transmitted when the signal is transmitted.
   The wireless transmission unit
   The charge communication control device according to claim 1, wherein when the predetermined signal receiving unit receives the predetermined signal, the stop request signal is transmitted to the wireless power transmission device.
3. The wireless power transmission apparatus further includes a stop signal transmission unit that transmits a stop signal indicating that the power transmission has been stopped to the on-vehicle device when the stop of the power transmission is confirmed by performing communication with the wireless power transmission apparatus. The charge communication control device according to 2.
4. And a completion signal receiving unit for receiving a completion signal transmitted by the in-vehicle device after transmitting the signal from the antenna to the communication device,
   The wireless transmission unit
   The charging communication control device according to claim 3, wherein when the completion signal is received, a resumption request signal for requesting resumption of power transmission by the wireless power transmission device is transmitted to the wireless power transmission device.
5. When locking / unlocking operation or engine start operation of a door of a vehicle equipped with a battery for driving a vehicle is performed, a signal for detecting a position of a communication device carried by a user is obtained from an antenna provided on the vehicle It is an in-vehicle device that sends
   The frequency band used for power transmission by the wireless power transmission device that charges the battery by transmitting power without contact to the vehicle partially overlaps the frequency band of the signal transmitted from the antenna. ,
   An on-vehicle apparatus comprising: a predetermined signal transmission unit configured to transmit a predetermined signal for stopping power transmission by the wireless power transmission device when a locking / unlocking operation or an engine start operation of a door of the vehicle is performed.
6. A request signal for requesting air pressure information from a communication device which is provided in a tire of a vehicle equipped with a battery for driving a vehicle and wirelessly transmits a tire air pressure signal obtained by detecting the air pressure of the tire is sent to the vehicle An in-vehicle device that receives the tire pressure signal transmitted from an antenna provided in response to the request signal from the communication device and monitors the air pressure of the tire,
   The frequency band used for power transmission by the wireless power transmission device that charges the battery by transmitting power without contact to the vehicle partially overlaps the frequency band of the signal transmitted from the antenna. ,
   An on-vehicle apparatus comprising: a predetermined signal transmission unit that transmits a predetermined signal for stopping power transmission by the wireless power transmission device prior to transmission of the request signal to the communication device.
7. The charge communication control device according to any one of claims 1 to 4.
   A communicator carried by a user and receiving a signal transmitted from the antenna;
   An in-vehicle device that transmits a signal for detecting the position of the communication device from the antenna when a locking / unlocking operation or an engine start operation of a door of the vehicle is performed;
   The communicator
   Receiving a position detection signal transmitted from the in-vehicle device, and transmitting a response signal corresponding to the received signal;
   The in-vehicle device is
   The position detection of the said communication apparatus is performed by receiving the said response signal transmitted from the said communication apparatus, According to a position detection result, the locking / unlocking of the said door or starting of an engine is instruct | indicated.
8. The charge communication control device according to claim 4;
   A communicator carried by a user and receiving a signal transmitted from the antenna;
   An in-vehicle device that transmits a signal for detecting the position of the communication device from the antenna when a locking / unlocking operation or an engine start operation of a door of the vehicle is performed;
   The in-vehicle device is
   A predetermined signal transmission unit that transmits the predetermined signal to the charging communication control device when a locking / unlocking operation of the door or an engine start operation is performed;
   A stop signal receiving unit that receives the stop signal transmitted from the charge communication control device;
   A position detection signal transmission unit that transmits a signal for detecting the position of the communication device from the antenna when the stop signal reception unit receives the stop signal;
   A completion signal transmission unit for transmitting the completion signal when the position of the communication device is detected;
   The communicator
   And a response signal transmission unit that receives the position detection signal transmitted from the in-vehicle device and transmits a response signal according to the received signal.
   The in-vehicle device is
   The position detection of the said communication apparatus is performed by receiving the response signal transmitted from the said communication apparatus, According to a position detection result, the locking / unlocking of the said door or starting of an engine are instruct | indicated.
9. The charge communication control device according to any one of claims 1 to 4.
   A communication device provided in a tire of the vehicle and wirelessly transmitting a tire pressure signal obtained by detecting an air pressure of the tire when a signal transmitted from an antenna provided in the vehicle is received;
   And a vehicle-mounted device for transmitting a signal for requesting transmission of the tire pressure signal from the antenna, receiving the tire pressure signal transmitted from the communication device according to the signal, and monitoring the air pressure of the tire. Charge communication control system provided.
10. The charge communication control device according to claim 4;
    A communication device provided on a tire of the vehicle and wirelessly transmitting a tire pressure signal obtained by detecting the air pressure of the tire when a signal transmitted from the antenna is received;
    A signal for requesting transmission of the tire air pressure signal is transmitted from an antenna provided in the vehicle, and the tire air pressure signal transmitted from the communication device is received according to the signal to monitor the air pressure of the tire. Equipped with an on-board unit to
    The in-vehicle device is
    A predetermined signal transmission unit that transmits the predetermined signal to the charge communication control device;
    A stop signal receiving unit that receives the stop signal transmitted from the charge communication control device;
    A pneumatic pressure request signal transmission unit for transmitting a signal for requesting transmission of the tire pressure signal from the antenna when the stop signal reception unit receives the stop signal;
    A completion signal transmission unit that transmits the completion signal when a signal for requesting transmission of the tire pressure signal is transmitted from an antenna provided in the vehicle, or when the tire pressure signal is received;
    A charge communication control system for monitoring the air pressure of the tire by receiving the tire pressure signal transmitted from the communication device in response to a signal for requesting transmission of the tire pressure signal.
11. A charging communication control method for communicating information related to charging control with a wireless power transmission apparatus for charging a battery by transmitting power without contact to a vehicle equipped with a battery for driving a vehicle.
    A frequency band used for power transmission by the wireless power transmission apparatus partially overlaps a frequency band of a signal transmitted from an antenna provided on the vehicle to a communication device for the vehicle.
    When the antenna transmits a signal to the communication device, the wireless power transmission apparatus transmits, to the wireless power transmission apparatus, a stop request signal for requesting to stop power transmission by the wireless power transmission apparatus.
    And a stop signal indicating that the power transfer has been stopped is transmitted when the stop of the power transfer is confirmed by performing communication with the wireless power transfer apparatus.
    

Images