JP2013157782A - Security communication system and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit data at a high rate while ensuring security between a vehicle for charging a battery by electric power supplied from a feeder apparatus and the outside of the vehicle.SOLUTION: After security information used for encryption in performing radio communication between a feeder apparatus 2 and an electronic apparatus 5 is transmitted from the feeder apparatus 2 to a charging apparatus 4 through coils 17, 18 by coil-to-coil communication sections 7, 12, the security information is transmitted from the charging apparatus 4 to the electronic apparatus 5 through a wire by in-vehicle wire communication sections 13, 14.

Description

  The present invention relates to a security communication system between a vehicle that charges a battery with electric power supplied from a power supply device and the outside of the vehicle, and the vehicle.

  Some wireless communication is performed between a vehicle such as an electric vehicle or a hybrid vehicle and a power supply device that supplies battery charging power to the vehicle (for example, see Patent Document 1).

  However, since there is always a concern about the risk of data decryption by a third party in wireless communication, it is necessary to add a security function, and initial settings such as sharing an encryption key are necessary, so the connection procedure is complicated. .

Therefore, it is conceivable to perform power line communication using a battery charging power cable (see, for example, Patent Document 2 or Patent Document 3).
However, since power line communication has a relatively low rate compared to wireless communication, it is not suitable for sending large capacity data.

Utility Model Registration No. 3148265 JP 2007-215033 A JP 2009-272769 A

  The present invention relates to a security communication system and a vehicle capable of transmitting data at a high rate while ensuring security between a vehicle that charges a battery with power supplied from a power supply device and the outside of the vehicle. The purpose is to provide.

  The security communication system of the present invention is provided in a power supply apparatus that supplies battery charging power to a vehicle by non-contact power transmission between coils, and holds security information used for encryption when performing wireless communication. An information holding unit; a power supply device-side inter-coil communication unit that is provided in the power supply device and transmits security information held in the security information holding unit using non-contact power transmission between the coils; The charging device side inter-coil communication means for receiving the security information transmitted from the power feeding device side inter-coil communication means, and the charging device provided for receiving by the charging device side inter-coil communication means. Provided on the charging device side wired communication means for transmitting the security information to be transmitted by wired communication and the electronic device in the vehicle The electronic device side wired communication means for receiving security information transmitted from the charging device side wired communication means, and the security information provided in the electronic device and received by the electronic device side wired communication means An electronic device-side wireless communication unit that performs wireless communication with an external wireless communication unit that is provided outside the vehicle and holds the security information in advance.

  With this configuration, security information can be securely shared between the electronic device-side wireless communication unit and the external wireless communication unit, and the security of wireless communication can be enhanced. Therefore, data can be transmitted at a high rate while ensuring security between the vehicle that charges the battery by the power supplied from the power supply apparatus and the outside of the vehicle.

  The external wireless communication unit may be provided in the power supply apparatus connected to an external network, and may be configured to transmit data obtained from the external network to the electronic device side wireless communication unit.

  The external wireless communication unit may be provided in an access point connected to an external network, and may be configured to transmit data obtained from the external network to the electronic device side wireless communication unit.

  The security communication system of the present invention is provided in an electronic device in a vehicle that charges a battery with power supplied from a power feeding device by non-contact power transmission between coils, and is used for encryption when performing wireless communication. Security information holding means for holding security information, electronic device side wired communication means for transmitting the security information held in the security information holding means by wired communication, and charging device in the vehicle A charging device side wired communication means for receiving security information transmitted from the electronic device side wired communication means, and security information provided in the charging device and received by the charging device side wired communication means Charging device side inter-coil communication means for transmitting to the power feeding device using non-contact power transmission between the coils; A power supply device-side inter-coil communication unit that is provided in the power supply device and receives security information transmitted from the charging device-side inter-coil communication unit, and is provided in the power supply device and is received by the power supply device-side inter-coil communication unit. And an external wireless communication means for performing wireless communication with the electronic device side wireless communication means provided in the electronic device using the security information.

  Even if comprised in this way, security information can be shared securely between the electronic device side radio | wireless communication means and the electric power feeder side radio | wireless communication means, and the security of radio | wireless communication can be improved. Therefore, data can be transmitted at a high rate while ensuring security between the vehicle that charges the battery by the power supplied from the charging system and the outside of the vehicle.

  The vehicle of the present invention is a vehicle that charges a battery with power supplied from a power feeding device by non-contact power transmission between coils, and is provided in the charging device that charges the battery when performing wireless communication. The charging device side inter-coil communication means for receiving the security information used for encryption of the charging device from the power supply device using non-contact power transmission between the coils, and the charging device, the charging device side coil between A charging device side wired communication means for transmitting security information received by the communication means by wired communication, and an electronic device provided in the electronic device in the vehicle for receiving the security information transmitted from the charging device side wired communication means Side wired communication means and security information provided in the electronic device and received by the electronic device side wired communication means. Performing the held external radio communication means and radio communication advance the security information provided and an electronic apparatus side wireless communication means.

  Even if comprised in this way, security information can be shared securely between the electronic device side radio | wireless communication means and an external radio | wireless communication means, and the security of radio | wireless communication can be improved. Therefore, data can be transmitted at a high rate while ensuring security between the vehicle that charges the battery by the power supplied from the charging system and the outside of the vehicle.

  The vehicle of the present invention is a vehicle that charges a battery with electric power supplied from a power feeding device by non-contact power transmission between coils, and is provided in an electronic device in the vehicle, and performs wireless communication with the power feeding device. Electronic device-side wireless communication means for performing, security information holding means for holding security information used for encryption when performing the wireless communication, provided in the electronic device, provided in the electronic device, and the security information The electronic device side wired communication means for transmitting the security information held in the holding means by wired communication and the charging device for charging the battery, and receives the security information transmitted from the electronic device side wired communication means. Charging device side wired communication means; security information provided in the charging device and received by the charging device side wired communication means; Using the non-contact power transmission between the serial coil and a charging device between coil communication means for transmitting to said power feeding device.

  Even if comprised in this way, security information can be shared securely between an electronic device and an electric power feeder, and the security of radio | wireless communication can be improved. Therefore, data can be transmitted at a high rate while ensuring security between the vehicle that charges the battery by the power supplied from the charging system and the outside of the vehicle.

  ADVANTAGE OF THE INVENTION According to this invention, data can be sent at a high rate, ensuring security between the vehicle which charges a battery with the electric power supplied from an electric power feeder, and the exterior of the vehicle.

It is a figure which shows the structure of the security communication system of 1st Embodiment of this invention. It is a figure which shows an example of the non-contact electric power feeding part and inter-coil communication part of an electric power feeder. It is a figure which shows an example of the non-contact power-receiving part and communication part between coils of a charging device. It is a figure which shows an example of operation | movement of the security communication system of 1st Embodiment. It is a figure which shows the other example of operation | movement of the security communication system of 1st Embodiment. It is a figure which shows the structure of the security communication system of 2nd Embodiment of this invention. It is a figure which shows an example of operation | movement of the security communication system of 2nd Embodiment. It is a figure which shows the structure of the security communication system of 3rd Embodiment of this invention. It is a figure which shows an example of operation | movement of the security communication system of 3rd Embodiment.

FIG. 1 is a diagram showing a configuration of a security communication system according to the first embodiment of this invention.
A security communication system 1 illustrated in FIG. 1 includes a power supply device 2 and a charging device 4 and an electronic device 5 provided in a vehicle 3 such as an electric vehicle or a hybrid vehicle.

  The power feeding device 2 includes a non-contact power feeding unit 6, an inter-coil communication unit 7 (power feeding device-side inter-coil communication unit), a security information holding unit 8 (security information holding unit), and a wireless communication unit 9 (external wireless communication unit). ) And the Ether communication unit 10.

The charging device 4 includes a non-contact power reception unit 11, an inter-coil communication unit 12 (charging device-side inter-coil communication unit), and an in-car wired communication unit 13 (charging device-side wired communication unit).
The electronic device 5 is, for example, a car navigation system, and includes an in-vehicle wired communication unit 14 (electronic device side wired communication unit) and a wireless communication unit 15 (electronic device side wireless communication unit).

  When receiving a charge start instruction from the user, the non-contact power supply unit 6 of the power supply device 2 transmits the electric power obtained from the commercial power supply 16 to the non-contact power reception unit 11 of the charging device 4 through the coils 17 and 18 in a non-contact manner. To do.

  The wireless communication unit 9 of the power supply apparatus 2 holds in advance security information that is the same as the security information held in the security information holding unit 8 (for example, an SSID (Service Set Identifier) or an encryption key).

The non-contact power receiving unit 11 of the charging device 4 charges the battery of the vehicle 3 with the power supplied from the power feeding device 2.
The inter-coil communication unit 12 of the charging device 4 performs inter-coil communication with the inter-coil communication unit 7 of the power feeding device 2 via the coils 17 and 18.

The in-vehicle wired communication unit 13 of the charging device 4 performs in-vehicle wired communication (for example, CAN (Controller Area Network) communication) with the in-vehicle wired communication unit 14 of the electronic device 5.
The wireless communication unit 15 of the electronic device 5 performs wireless communication (for example, wireless LAN (Local Area Network) communication) with the wireless communication unit 9 of the power supply apparatus 2. At that time, the wireless communication units 9 and 15 perform encryption using the security information held in the security information holding unit 8 of the power supply apparatus 2.

  The Ether communication unit 10 of the power supply apparatus 2 is connected to an external network 19 (for example, the Internet), and data (for example, music data, video data, or image data (map data for updating car navigation systems) from the external network 19. The data acquired by the Ether communication unit 10 is transmitted to the electronic device 5 by the wireless communication units 9 and 15.

FIG. 2 is a diagram illustrating an example of the non-contact power feeding unit 6 and the inter-coil communication unit 7 of the power feeding device 2. In addition, the same code | symbol is attached | subjected to the same structure as the structure shown in FIG.
The non-contact power supply unit 6 includes a high frequency power supply 61, a matching unit 62, and a power supply control unit 63.

  The high-frequency power supply 61 uses the power of the commercial power supply 16 (for example, 50 Hz or 60 Hz and 100 V or 200 V) at a high frequency and high voltage (for example, several hundred kHz and several thousand volts). Power).

The matching unit 62 includes, for example, a capacitor connected in series or in parallel with the coil 17, a circuit for improving the power factor of power output from the high frequency power supply 61, and the like.
The power supply control unit 63 controls operations of the high frequency power supply 61 and the matching unit 62. For example, the power supply control unit 63 is configured by a CPU (Central Processing Unit) or a programmable device (FPGA (Field Programmable Gate Array), PLD (Programmable Logic Device), etc.) and a recording unit, and is recorded in the recording unit. When the CPU or programmable device reads and executes the charge control program, the power is output from the high frequency power supply 61 and the power is transmitted to the contactless power receiving unit 11 via the coils 17 and 18 in a contactless manner. The contactless power transmission method at this time is not particularly limited, for example, an electromagnetic induction method, a radio wave method, or a magnetic field resonance method. In addition, when transmitting security information or charging the battery 114, the coils 17 and 18 can transmit power between the non-contact power feeding unit 6 and the non-contact power receiving unit 11 in a non-contact manner via the coils 17 and 18, respectively. It is assumed that the position has been adjusted to be possible.

The inter-coil communication unit 7 includes an encoding unit 71, an oscillation unit 72, a signal generation unit 73, a driving unit 74, a coupling unit 75, a filter unit 76, a decoding unit 77, and a communication control unit 78. Is provided.
The encoding unit 71 outputs information (for example, the security information described above) transmitted from the communication control unit 78 as a pulse signal. For example, the encoding unit 71 sets the “1” portion of the code character string consisting of “1” and “0” as information sent from the communication control unit 78 to a high level of a predetermined width, and the “0” portion. A pulse signal for setting a low level of a predetermined width is output.

The oscillating unit 72 outputs a sine wave having a frequency different from that of the power output from the high frequency power supply 61 as a carrier wave.
The signal generation unit 73 digitally modulates the carrier wave output from the oscillation unit 72 with the pulse signal output from the encoding unit 71. The modulation scheme at this time is not particularly limited, such as FSK (frequency shift keying), ASK (amplitude shift keying), or PSK (phase shift keying).

The drive unit 74 is configured by an amplifier circuit such as an operational amplifier, for example, and amplifies the amplitude of the signal output from the signal generation unit 73.
The coupling unit 75 includes a transformer 79 and capacitors 80 and 81, and the non-contact power feeding unit 6 and the inter-coil communication unit 7 are insulated from each other by the transformer 79 and the capacitors 80 and 81. The coupling unit 75 transmits a signal output from the driving unit 74 to the power line between the high frequency power supply 61 and the matching unit 62 by electromagnetic induction generated in the primary coil and the secondary coil of the transformer 79, or A signal on the power line between the high frequency power supply 61 and the matching unit 62 is transmitted to the filter unit 76. The coupling unit 75 is not limited to the configuration shown in FIG.

The filter unit 76 is, for example, a bandpass filter, and outputs only a signal in a predetermined frequency band among signals on the power line between the high frequency power supply 61 and the matching unit 62.
The decoding unit 77 acquires information by digitally decoding the signal output from the filter unit 76.

  The communication control unit 78 sends the security information and the like held in the security information holding unit 8 to the encoding unit 71, and the information (for example, a desired charging current value) acquired by the decoding unit 77 is the power supply control unit 63. Send to etc.

  FIG. 3 is a diagram illustrating an example of the non-contact power reception unit 11 and the inter-coil communication unit 12 of the charging device 4. In addition, the same code | symbol is attached | subjected to the same structure as the structure shown in FIG.1 and FIG.2. Moreover, since the inter-coil communication unit 12 of the charging device 4 has the same configuration as the inter-coil communication unit 7 of the power feeding device 2, the description thereof is omitted.

The non-contact power reception unit 11 includes a matching unit 111, a rectification unit 112, a detection unit 113, a battery 114, and a power reception control unit 115.
The matching unit 111 includes, for example, a capacitor connected in series or in parallel with the coil 18 and a circuit for matching the impedance on the coil 18 side and the impedance on the rectifying unit 112 side.

The rectifying unit 112 rectifies the electric power transmitted from the non-contact power supply unit 6 through the coils 17 and 18 in a non-contact manner, and charges the battery 114 with the rectified electric power.
The detection unit 113 detects the voltage of the battery 114, the charging current to the battery 114, and the discharging current from the battery 114. Note that the voltage and current detected by the detection unit 113 are used, for example, in the power reception control unit 115 to obtain an SOC (State Of Charge) of the battery 114 and a desired charging current value.

  The power reception control unit 115 controls operations of the matching unit 111, the rectifying unit 112, and the like. For example, the power reception control unit 115 includes a CPU or a programmable device and a recording unit, and the CPU or the programmable device reads out and executes a charge control program recorded in the recording unit, so that the non-contact power feeding unit The battery 114 is charged by the electric power transmitted from 6 through the coils 17 and 18 in a contactless manner.

  Here, for example, an operation example of the security communication system 1 when the security information is transmitted from the inter-coil communication unit 7 of the power feeding device 2 to the inter-coil communication unit 12 of the charging device 4 via the coils 17 and 18 will be described.

First, the communication control unit 78 on the power feeding device 2 side extracts security information from the security information holding unit 8 and outputs the security information to the encoding unit 71 on the power feeding device 2 side.
Next, the encoding unit 71 on the power feeding device 2 side outputs a pulse signal indicating security information to the signal generating unit 73 on the power feeding device 2 side, and the signal generating unit 73 is an input pulse signal, and the power feeding device 2 The carrier wave output from the oscillation unit 72 on the side is digitally modulated. The drive unit 74 on the power supply device 2 side amplifies the amplitude of the signal output from the signal generation unit 73 on the power supply device 2 side and outputs the amplified signal to the coupling unit 75 on the power supply device 2 side. Then, the signal output from the drive unit 74 on the power feeding device 2 side is a high-frequency power source for the non-contact power feeding unit 6 by electromagnetic induction generated in the primary coil and the secondary coil of the transformer 79 of the coupling unit 75 on the power feeding device 2 side. It is transmitted to the power line between 61 and the matching unit 62. In addition, a signal output from the drive unit 74 on the power supply device 2 side and transmitted to the power line between the high frequency power supply 61 and the matching unit 62 is transmitted from the non-contact power supply unit 6 to the coil by using the non-contact power transmission method. It is transmitted to the non-contact power receiving unit 11 via 17 and 18. Furthermore, a signal transmitted from the non-contact power feeding unit 6 to the power line between the matching unit 111 and the rectifying unit 112 of the non-contact power receiving unit 11 via the coils 17 and 18 is converted into the transformer 79 of the coupling unit 75 on the charging device 4 side. Is transmitted to the filter unit 76 on the charging device 4 side by electromagnetic induction of the primary coil and the secondary coil.

  And the filter part 76 by the side of the charging apparatus 4 outputs only the signal which shows security information among the input signals to the decoding part 77 by the side of the charging apparatus 4, and the decoding part 77 by the side of the charging apparatus 4 is input. Security information is obtained by decoding the signal.

FIG. 4 is a diagram illustrating an example of the operation of the security communication system 1 according to the first embodiment.
First, the inter-coil communication unit 7 of the power feeding device 2 has a positional relationship sufficient for non-contact charging between the coils 17 and 18 when the vehicle 3 is parked in a specific parking space. When the charging start instruction is received (S1 is Yes), the security information held in the security information holding unit 8 is transmitted to the vehicle 3 via the coils 17 and 18 (S2).

  Next, when the inter-coil communication unit 12 of the charging device 4 receives the security information transmitted from the inter-coil communication unit 7 (S3 is Yes), the in-car wired communication unit 13 of the charging device 4 transmits the security information to the electronic device. 5 (S4).

  When the in-vehicle wired communication unit 14 of the electronic device 5 receives the security information transmitted from the in-vehicle wired communication unit 13 (Yes in S5), the wireless communication unit 9 of the power supply device 2 and the wireless communication unit 15 of the electronic device 5 are After performing an authentication process necessary for wireless communication using a packet encrypted with a predetermined encryption method (for example, WPA (for example, Wi-Fi Protected Access)) in which the security information is used (S6), Data encrypted by a predetermined encryption method using the security information is transmitted / received to / from each other (S7).

  In FIG. 4, the mutual positional relationship between the coils 17 and 18 is sufficient for non-contact charging, and when a charging start instruction is received from the user, security information is transmitted from the power supply device 2 to the vehicle 3. As shown in FIG. 5, after the positional relationship between the coils 17 and 18 is sufficient to perform non-contact charging and a charging start instruction is received from the user (ST1 is Yes), a transmission request for security information is transmitted from the inter-coil communication unit 12 of the charging device 4 to the power supply device 2 via the coils 17 and 18 (ST2), and the inter-coil communication unit 7 of the power supply device 2 sends the transmission request to the power supply device 2. When received (Yes in ST3), the security information held in the security information holding unit 8 is transmitted from the inter-coil communication unit 7 of the power feeding device 2 to the coil of the charging device 4 via the coils 17 and 18. And transmits to the section 12 (ST4) may be configured to. Subsequent operations ST5 to ST9 are the same as S3 to S7 in FIG.

  Here, for example, an operation example of the security communication system 1 in a case where a transmission request for security information is transmitted from the inter-coil communication unit 12 of the charging device 4 to the inter-coil communication unit 7 of the power feeding device 2 via the coils 17 and 18. explain.

For example, first, the communication control unit 78 on the charging device 4 side outputs a security information transmission request to the encoding unit 71 on the charging device 4 side.
Next, the encoding unit 71 on the charging device 4 side outputs a pulse signal indicating a security information transmission request to the signal generating unit 73 on the charging device 4 side, and the signal generating unit 73 is charged with the input pulse signal. The carrier wave output from the oscillation unit 72 on the device 4 side is digitally modulated. The drive unit 74 on the charging device 4 side amplifies the amplitude of the signal output from the signal generation unit 73 on the charging device 4 side and outputs the amplified signal to the coupling unit 75 on the charging device 4 side. Then, the signal output from the driving unit 74 on the charging device 4 side is a matching unit of the non-contact power receiving unit 11 due to electromagnetic induction generated in the primary coil and the secondary coil of the transformer 79 of the coupling unit 75 on the charging device 4 side. It is transmitted to the power line between 111 and the rectifying unit 112. Further, the signal output from the driving unit 74 on the charging device 4 side and transmitted to the power line between the matching unit 111 and the rectifying unit 112 is converted from the non-contact power receiving unit 11 to the coil by using the non-contact power transmission method. It is transmitted to the non-contact power feeding unit 6 through 17 and 18. Furthermore, a signal transmitted from the non-contact power receiving unit 11 to the power line between the high frequency power supply 61 and the matching unit 62 of the non-contact power feeding unit 6 via the coils 17 and 18 is converted into the transformer 79 of the coupling unit 75 on the power feeding device 2 side. Are transmitted to the filter unit 76 on the power feeding device 2 side by electromagnetic induction of the primary coil and the secondary coil.

  And the filter part 76 by the side of the electric power feeder 2 outputs only the signal which shows security information among the input signals to the decoding part 77 by the side of the electric power feeder 2 and the decoding part 77 by the side of the electric power feeder 2 is input. A security information transmission request is acquired by decoding the signal.

  As described above, in the security communication system 1 of the first embodiment, the security information used for encryption when performing wireless communication is a coil having a shorter communication distance and higher security than the wireless communication by the wireless communication units 9 and 15. Security information can be securely shared between the wireless communication unit 9 and the wireless communication unit 15 because wireless communication is transmitted from the power supply device 2 to the electronic device 5 by inter-communication or in-car wired communication. Can be increased. Therefore, data can be transmitted at a high rate between the electronic device 5 and the power supply device 2, that is, between the vehicle 3 and the outside of the vehicle 3 while ensuring security.

FIG. 6 is a diagram showing a configuration of a security communication system according to the second exemplary embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same structure as the structure shown in FIG.
The security communication system 20 of the second embodiment shown in FIG. 6 is different from the security communication system 1 of the first embodiment shown in FIG. 1 in that a wireless communication unit 9 and an Ether communication unit 10 are provided in the vicinity of the power feeding device 2. The access point 21 is provided. In addition, when the positional relationship between the coils 17 and 18 is sufficient for the contactless charging, the access point 21 receives radio communication radio waves from the electronic device 5 to the access point 21 and accesses the access point 21. It is assumed that the radio communication radio wave at the point 21 is provided at a position where it can reach the electronic device 5. The security information held in the security information holding unit 8 is the same as the security information held in advance in the access point 21.

FIG. 7 is a diagram illustrating an example of the operation of the security communication system 20 according to the second embodiment.
First, the inter-coil communication unit 7 of the power feeding device 2 has a positional relationship sufficient for non-contact charging between the coils 17 and 18 when the vehicle 3 is parked in a specific parking space. When the charging start instruction is received from SST (Yes in STE1), the security information held in the security information holding unit 8 is transmitted to the vehicle 3 via the coils 17 and 18 (STE2).

  Next, when the inter-coil communication unit 12 of the charging device 4 receives the security information transmitted from the inter-coil communication unit 7 (Yes in STE3), the in-car wired communication unit 13 of the charging device 4 transmits the security information to the electronic device. 5 (STE4).

  When the in-car wired communication unit 14 of the electronic device 5 receives the security information transmitted from the in-car wired communication unit 13 (Yes in STE5), the wireless communication unit 15 of the power supply apparatus 2 and the wireless communication unit 9 of the access point 21 are After performing authentication processing necessary for wireless communication using a packet encrypted with a predetermined encryption method (for example, WPA (for example, Wi-Fi Protected Access)) in which the security information is used (STE 6), Data encrypted by a predetermined encryption method using the security information is transmitted / received to / from each other (STE 7).

  As described above, also in the security communication system 20 of the second embodiment, security information can be securely shared between the wireless communication unit 9 and the wireless communication unit 15 as in the security communication system of the first embodiment. Wireless communication security can be increased. Therefore, data can be transmitted at a high rate while ensuring security between the electronic device 5 and the access point 21, that is, between the vehicle 3 and the outside of the vehicle 3.

  In the security communication system 20 of the second embodiment, a security information transmission request is transmitted from the charging device 4 to the power supply device 2 via the coils 17 and 18 as in the security communication system 1 of the first embodiment. After that, the security information may be transmitted from the power feeding device 2 to the charging device 4 via the coils 17 and 18.

FIG. 8 is a diagram showing a configuration of a security communication system according to the third exemplary embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same structure as the structure shown in FIG.
The security communication system 22 of the third embodiment shown in FIG. 8 is different from the security communication system 1 of the first embodiment shown in FIG. 1 in that the security information holding unit 8 is provided in the electronic device 5. .

FIG. 9 is a diagram illustrating an example of the operation of the security communication system 22 according to the third embodiment.
First, the in-vehicle wired communication unit 13 of the charging device 4 has a positional relationship sufficient for non-contact charging between the coils 17 and 18 when the vehicle 3 is parked in a specific parking space. When a charging start instruction is received from (STEP 1 is Yes), a security information transmission request is transmitted to the electronic device 5 (STEP 2).

  Next, when the in-vehicle wired communication unit 14 of the electronic device 5 receives the transmission request (STEP 3 is Yes), it transmits the security information held in the security information holding unit 8 to the charging device 4 (STEP 4).

  Next, when the in-car wired communication unit 13 of the charging device 4 receives the security information transmitted from the in-car wired communication unit 14 (STEP 5 is Yes), the inter-coil communication unit 12 of the charging device 4 stores the security information in the coil 17. , 18 to the power feeding device 2 (STEP 6).

  When the inter-coil communication unit 7 of the power supply apparatus 2 receives the security information transmitted from the inter-coil communication unit 12 (STEP 7 is Yes), the wireless communication unit 9 of the power supply apparatus 2 and the wireless communication unit 15 of the electronic device 5 are After performing authentication processing necessary for wireless communication with a packet encrypted by a predetermined encryption method (for example, WPA (for example, Wi-Fi Protected Access)) in which the security information is used (STEP 8), Data encrypted by a predetermined encryption method using the security information is transmitted / received to / from each other (STEP 9).

  The operation example of the security communication system 22 when the security information is transmitted from the inter-coil communication unit 12 of the charging device 4 to the inter-coil communication unit 7 of the power feeding device 2 via the coils 17 and 18 is as described above. This is the same as the operation example of the security communication system 1 when a transmission request for security information is transmitted from the inter-coil communication unit 12 of the charging device 4 to the inter-coil communication unit 7 of the power supply device 2 via the coils 17 and 18.

  Thus, also in the security communication system 20 of the third embodiment, the wireless communication unit 9 and the wireless communication unit 15 are similar to the security communication system 1 of the first embodiment and the security communication system 20 of the second embodiment. Security information can be shared securely between the two, and the security of wireless communication can be increased. Therefore, data can be transmitted at a high rate between the electronic device 5 and the power supply device 2, that is, between the vehicle 3 and the outside of the vehicle 3 while ensuring security.

DESCRIPTION OF SYMBOLS 1 Security communication system 2 Electric power feeding apparatus 3 Vehicle 4 Charging apparatus 5 Electronic device 6 Non-contact electric power feeding part 7 Inter-coil communication part 8 Security information holding part 9 Wireless communication part 10 Ether communication part 11 Non-contact electric power reception part 12 Inter-coil communication part 13 Car interior Wired communication unit 14 In-car wired communication unit 15 Wireless communication unit 16 Commercial power supply 17 Coil 18 Coil 19 External network 20 Security communication system 21 Access point 22 Security communication system

Claims (6)

A security information holding unit that is provided in a power supply device that supplies battery charging power to a vehicle by non-contact power transmission between coils, and that holds security information used for encryption when performing wireless communication;
Power feeding device side inter-coil communication means that is provided in the power feeding device and transmits security information held in the security information holding means using non-contact power transmission between the coils;
A charging device side inter-coil communication unit that is provided in the charging device in the vehicle and receives security information transmitted from the power feeding device side inter-coil communication unit;
The charging device side wired communication means, which is provided in the charging device and transmits the security information received by the charging device side inter-coil communication means by wired communication;
Electronic device-side wired communication means that is provided in the electronic device in the vehicle and receives security information transmitted from the charging device-side wired communication means;
An electronic device that is provided in the electronic device and wirelessly communicates with an external wireless communication unit that is provided outside the vehicle using security information received by the electronic device-side wired communication unit and holds the security information in advance. A device-side wireless communication means;
A security communication system comprising: The security communication system according to claim 1,
The security communication system, wherein the external wireless communication means is provided in the power supply apparatus connected to an external network, and transmits data obtained from the external network to the electronic device-side wireless communication means. The security communication system according to claim 1,
The external wireless communication unit is provided in an access point connected to an external network, and transmits data obtained from the external network to the electronic device-side wireless communication unit. Security information holding means for holding security information used for encryption when performing wireless communication, provided in an electronic device in a vehicle that charges a battery with power supplied from a power supply device by non-contact power transmission between coils When,
Electronic device side wired communication means that is provided in the electronic device and transmits the security information held in the security information holding means by wired communication;
The charging device side wired communication means that is provided in the charging device in the vehicle and receives security information transmitted from the electronic device side wired communication means;
Charging device side inter-coil communication means that is provided in the charging device and transmits security information received by the charging device side wired communication means to the power feeding device using non-contact power transmission between the coils;
Provided in the power supply apparatus, the power supply apparatus side inter-coil communication means for receiving security information transmitted from the charging apparatus side inter-coil communication means,
External wireless communication means that is provided in the power supply device and performs wireless communication with electronic device side wireless communication means provided in the electronic device using security information received by the power supply device side inter-coil communication means;
A security communication system comprising: A vehicle that charges a battery with power supplied from a power supply device by non-contact power transmission between coils,
Between the charging device side coils provided in the charging device for charging the battery and receiving security information used for encryption at the time of performing wireless communication from the power feeding device using non-contact power transmission between the coils Communication means;
The charging device side wired communication means, which is provided in the charging device and transmits the security information received by the charging device side inter-coil communication means by wired communication;
Electronic device-side wired communication means that is provided in an electronic device in the vehicle and receives security information transmitted from the charging device-side wired communication means;
An electronic device that is provided in the electronic device and wirelessly communicates with an external wireless communication unit that is provided outside the vehicle using security information received by the electronic device-side wired communication unit and holds the security information in advance. A device-side wireless communication means;
A vehicle comprising: A vehicle that charges a battery with power supplied from a power supply device by non-contact power transmission between coils,
Electronic device-side wireless communication means that is provided in an electronic device in the vehicle and performs wireless communication with the power supply device;
Security information holding means provided in the electronic device and holding security information used for encryption when performing the wireless communication;
Electronic device side wired communication means that is provided in the electronic device and transmits the security information held in the security information holding means by wired communication;
A charging device side wired communication unit that is provided in a charging device that charges the battery and receives security information transmitted from the electronic device side wired communication unit;
Charging device side inter-coil communication means that is provided in the charging device and transmits security information received by the charging device side wired communication means to the power feeding device using non-contact power transmission between the coils;
A vehicle comprising:

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