JP5462095B2 - Charger - Google Patents

Description

  The present invention relates to a charging device that supplies electric power to an in-vehicle battery.

  In recent years, electric cars and hybrid cars that can be driven by electric power have attracted attention. These vehicles include a vehicle-mounted battery, and power is supplied to the vehicle-mounted battery from an external power source such as a charging stand provided outside the vehicle via a charging cable. Specifically, one end of the charging cable is connected to the main body of the charging stand, and a power supply plug is provided at the other end. By connecting the power supply plug to an inlet (charging port) provided on the outer side surface of the vehicle, the charging stand and the vehicle are in a conductive state. In this state, the vehicle-mounted battery can be charged with power from the main body of the charging stand via the charging cable (see, for example, Patent Document 1).

  By the way, in general, the charging station is provided outdoors, and there is a possibility that the person's vehicle is illegally charged by a third party through the charging station. Various countermeasures have been taken against such unauthorized charging. For example, in the configuration shown in Patent Document 2, information on a regular electronic key is registered in a charging stand. Then, charging from the charging device to the vehicle is permitted only when authentication through a wireless signal is established between the electronic key and the charging device. This restricts unauthorized charging by a person who does not carry the electronic key.

JP-A-9-161898 JP 2007-252016 A

  By the way, considering that the charging stand is provided in an apartment house or a contract parking lot, a configuration in which a plurality of authorized users can charge a vehicle has been studied. Specifically, a plurality of charging cables are provided on the main body of a single charging device. Then, when the electronic key is authenticated in the charging device, charging to the vehicle is permitted and charging through each charging cable becomes possible. That is, when a user carrying a regular electronic key performs charging, charging to the vehicle is permitted in the charging device, so that charging to the vehicle is possible through an arbitrary charging cable. However, in this state, charging through another charging cable is also possible. Therefore, there is a risk that the person who does not carry the legitimate electronic key may be charged illegally.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a charging device with improved security.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
The invention according to claim 1 is connectable to a plurality of vehicles via power supply plugs provided at the tips of the plurality of charging cables, and each power is supplied to each vehicle via each charging cable. In a charging device that charges a vehicle-mounted battery, a request signal is transmitted through a transmission antenna provided in each power plug, and a portable device that is carried by a user in response to a request signal transmitted from a transmission antenna of a specific power plug When the validity of the ID code included in the response signal transmitted from is confirmed, the gist of the present invention is to provide a control device that can supply power only to the specific power plug.

  According to this configuration, even in a configuration in which the charging device is provided with a plurality of charging cables, it is possible to charge only a regular vehicle. Specifically, a user carrying a legitimate portable device connects a specific power plug to the vehicle. A transmission antenna of a specific power supply plug transmits a request signal to the portable device. The portable device transmits a response signal including an ID code in response to the received request signal. When the validity of the ID code included in the received response signal is confirmed, the control device can supply power only to the specific power plug, and does not supply power to other power plugs other than the specific power plug. As a result, unauthorized charging by a person who does not carry a legitimate portable device using another power supply plug is restricted. Accordingly, security can be maintained even in an environment where a plurality of power supply plugs are used.

  According to a second aspect of the present invention, in the charging device according to the first aspect of the present invention, the charging device includes a detection sensor that detects whether or not the power supply plug is connected to the vehicle, and the control device is connected to the vehicle through the detection sensor. The gist is to transmit a request signal via the transmission antenna of the specific power supply plug when it is recognized that the specific power supply plug is connected.

  According to this configuration, when the power supply plug is connected to the vehicle, the request signal is transmitted via the transmission antenna of the power supply plug. Here, the user holds the power plug when connecting the power plug to the vehicle. Therefore, the portable device carried by the user can reliably receive the request signal from the transmission antenna.

  According to a third aspect of the present invention, in the charging device according to the first or second aspect, the vehicle transmits a request signal of the same type as the request signal transmitted through the transmission antenna to the periphery of the vehicle, The gist is that the vehicle door can be unlocked when the validity of the ID code included in the response signal from the portable device with respect to the request signal is confirmed.

  According to this configuration, the portable device returns a response signal not only to the charging device but also to a request signal from the vehicle. When the vehicle confirms the validity of the ID code included in the response signal from the portable device, the vehicle can unlock the vehicle door. That is, the portable device can communicate with the charging device without adding a new configuration to the portable device constituting the electronic key system.

  According to the present invention, security can be improved in a charging device.

The block diagram of a vehicle, an electronic key, and a charging device. FIG. The timing chart of the various signals transmitted from a vehicle, a charging device, and an electronic key. The flowchart which shows the process sequence of a charge control program.

Hereinafter, an embodiment in which a charging device according to the present invention is embodied will be described with reference to FIGS.
As shown in FIG. 1, a vehicle 10 that is an electric vehicle is charged by a charging device 30 provided in a parking lot. The charging device 30 includes first to third charging cables 41 to 43 extending from the main body, and first to third power supply plugs 41a to 43a are provided at the respective ends. Each of the power supply plugs 41 a to 43 a is inserted into a charging port 10 a provided on the outer surface of the vehicle 10. Thereby, the charging device 30 and the vehicle 10 will be in a conduction | electrical_connection state via the charging cables 41-43. The charging cables 41 to 43 include, in addition to power lines, signal lines that transmit signals from a transmission antenna 38a and plug detection switches 32 provided in power supply plugs 41a to 43a, which will be described later, to the main body side of the charging device 30. Are bundled and the outer periphery is coated with resin.

  The vehicle 10 includes a vehicle side control unit 11, a charging circuit 12, a battery unit 13, and a motor 14. In FIG. 1, the first charging cable 41 is inserted into the charging port 10 a of the vehicle 10. The charging circuit 12 converts AC power supplied to the vehicle 10 through the charging cable 41 into DC power, and supplies the DC power to the battery unit 13. Thereby, the battery unit 13 is charged. The vehicle-side control unit 11 performs control related to the charging power to the battery unit 13 through the charging circuit 12. Further, the vehicle-side control unit 11 controls power supply to the motor 14 through the battery unit 13. By supplying electric power to the motor 14, the drive wheels are driven via the output shaft of the motor 14. As a result, the vehicle 10 can travel. The battery unit 13 includes a voltage sensor 13 a that detects a battery voltage, and the detection result of the voltage sensor 13 a is output to the vehicle-side control unit 11. The vehicle-side control unit 11 recognizes the charged amount of the battery unit 13 based on the detection result of the voltage sensor 13a.

  The vehicle-side control unit 11 includes a non-volatile memory 11a, in which a key ID code individually set for the vehicle 10, a vehicle ID code unique to the vehicle, and the like are stored.

  The vehicle 10 is equipped with an electronic key system that can lock and unlock the vehicle door through communication with the electronic key 20 carried by the user. That is, the vehicle 10 includes a transmission circuit 18, a transmission antenna 18 a, a reception antenna 17 a, a reception circuit 17, a door lock device 16, and a door handle switch 19. The transmission circuit 18 modulates the request signal input from the vehicle side control unit 11 into a radio wave having a predetermined frequency. In the present embodiment, the predetermined frequency is an LF (Low Frequency) band frequency. The transmission antenna 18a transmits the request signal modulated by the transmission circuit 18 around the vehicle.

  As shown in FIG. 2, the transmission circuit 18 and the transmission antenna 18a are built in the door handle of the vehicle door. The request signal is transmitted to the communication area 50 set in a semicircular shape around the door handle as viewed from above the vehicle 10. Each door handle is provided with a door handle switch 19. As shown in FIG. 1, when the door handle switch 19 is operated, an operation signal to that effect is output to the vehicle-side controller 11.

  Here, as shown in the lower right of FIG. 1, the electronic key 20 includes a key-side control unit 21, a transmission circuit 28, a transmission antenna 28 a, a reception antenna 27 a, and a reception circuit 27. The key-side control unit 21 includes a nonvolatile memory 21a, and the memory 21a stores the same key ID code and vehicle ID code as the code stored in the memory 11a of the vehicle 10. The receiving antenna 27a receives a request signal transmitted from the vehicle 10. The receiving circuit 27 demodulates the request signal received by the receiving antenna 27 a and outputs the demodulated request signal to the key-side control unit 21.

  When the key-side control unit 21 recognizes that the request signal is input from the receiving circuit 27, the key-side control unit 21 generates a response signal including the key ID code stored in the memory 21a and outputs the response signal to the transmission circuit 28. . The transmission circuit 28 modulates the response signal input from the key-side control unit 21 into a radio wave having a predetermined frequency. In the present embodiment, the predetermined frequency is an RF (Radio Frequency) band frequency. The transmission antenna 28a transmits the response signal modulated by the transmission circuit 28.

  The receiving antenna 17 a of the vehicle 10 receives the response signal from the electronic key 20. The receiving circuit 17 demodulates the response signal received through the receiving antenna 17 a and outputs the demodulated response signal to the vehicle-side control unit 11.

  The vehicle-side control unit 11 recognizes the input response signal and collates the key ID code included in the response signal with the key ID code stored in the memory 11a. The vehicle side control part 11 will be in an unlocking permission state, when collation of key ID code is materialized. When receiving an operation signal indicating that the door handle switch 19 has been operated in the unlocking permitted state, the vehicle-side control unit 11 unlocks the vehicle door via the door lock device 16.

  Here, to be precise, the request signal and the response signal are not a single signal but a plurality of signals. That is, the request signal includes a wake signal Swk, a vehicle ID signal Sve, and a challenge signal Scc, as shown in the upper part of FIG. The response signal includes an ACK signal Sac and a response signal Sre as shown in the lower part of FIG.

  As shown in the upper part of FIG. 3, the vehicle 10 intermittently transmits a wake signal Swk from the transmission antenna 18 a in order to check whether or not the electronic key 20 exists in the communication area 50. The wake signal Swk is a command signal that activates the electronic key 20 in a standby state, and is repeatedly transmitted from the transmission antenna 18a at regular time intervals.

  When the electronic key 20 enters the communication area 50 and receives the wake signal Swk, the operating state is switched from the standby state to the activated state. As shown in the lower part of FIG. 3, when the electronic key 20 is normally activated, the electronic key 20 transmits an ACK signal Sac toward the vehicle 10 to notify that effect.

  When vehicle 10 receives ACK signal Sac, vehicle 10 determines that electronic key 20 is present in communication area 50. Then, the vehicle 10 transmits a vehicle ID signal Sve including a vehicle ID code that identifies the vehicle.

  When receiving the vehicle ID signal Sve, the electronic key 20 collates the vehicle ID code included in the vehicle ID signal Sve (vehicle ID collation). Specifically, the key-side control unit 21 determines whether or not the vehicle 10 is a legitimate vehicle through verification of the vehicle ID code included in the vehicle ID signal Sve and the vehicle ID code stored in the memory 21a. I do. The key-side control unit 21 determines that the vehicle is a regular vehicle when the vehicle ID verification is established, and determines that the vehicle is not a regular vehicle when the vehicle ID verification is not established. Thus, by performing vehicle ID collation, even if there are a plurality of vehicles around the electronic key 20 and a request signal is received from the plurality of vehicles, the electronic key 20 corresponds to itself. Communication after receiving the vehicle ID signal Sve can be performed only with the regular vehicle.

In other words, as shown in the lower part of FIG. 3, when the electronic key 20 recognizes that the vehicle ID verification has been established, it returns an ACK signal Sac to the vehicle 10 to notify that.
When the vehicle 10 receives the ACK signal Sac normally after transmitting the vehicle ID signal Sve, the vehicle 10 recognizes that the vehicle ID verification is established in the electronic key 20, and the electronic key 20 existing in the communication area 50 pairs with itself. Recognize that

  When the vehicle 10 recognizes that the vehicle ID verification has been established, it next transmits a challenge signal Scc. The challenge signal Scc includes a challenge code used as a random number and a key number of the electronic key 20 registered in the vehicle 10.

  When the electronic key 20 receives the challenge signal Scc from the vehicle 10, the electronic key 20 compares the key number received at this time with the key number registered in the electronic key 20 to determine whether or not it is a communication target. To do. The number verification is verification for determining the master or sub key type for the electronic key 20 of the communication partner.

  The electronic key 20 in which this number verification is established transmits a response signal Sre including the key ID code and the response code stored in its own memory 11 a to the vehicle 10. The response code is a code obtained by encrypting the challenge code using the encryption key.

  When receiving the response signal Sre, the vehicle 10 performs response verification and key ID verification. Specifically, when transmitting the challenge signal Scc, the vehicle-side control unit 11 also generates a response code by encrypting the challenge code with its own encryption key. And the vehicle side control part 11 will collate the response code of response signal Sre, and the response code which self calculated, if the response signal Sre is received from the electronic key 20 (response collation). When confirming that this response verification is established, the vehicle 10 performs verification between the key ID code included in the response signal Sre and the key ID code stored in the memory 11a (key ID verification).

  And if vehicle 10 confirms that response collation and key ID code collation are materialized, it will process that ID collation was materialized by this. When ID collation is established, the vehicle-side control unit 11 enters an unlocking permitted state. When receiving an operation signal indicating that the door handle switch 19 has been operated in the unlocking permitted state, the vehicle-side control unit 11 unlocks the vehicle door via the door lock device 16.

Next, the configuration of the charging device 30 will be described. Communication between the charging device 30 and the electronic key 20 is almost the same as the communication between the vehicle 10 and the electronic key 20 described above.
In addition to the charging cables 41 to 43 including the power feeding plugs 41a to 43a, the charging device 30 includes a charging side control unit 31, a plug detection switch 32, a receiving circuit 37, a receiving antenna 37a, a transmitting circuit 38, A transmission antenna 38a and a switch circuit 39 are provided. The plug detection switch 32 and the transmission antenna 38 a are provided in each of the power supply plugs 41 a to 43 a, and the others are provided in the main body of the charging device 30.

  The charging side control unit 31 includes a memory 31a, and the memory 31a stores the same key ID code and vehicle ID code as those stored in the memory 11a of the vehicle 10, a charging control program, and the like.

  The switch circuit 39 permits or cuts off power supply from the commercial power supply 2 to the charging cables 41 to 43. The switch circuit 39 can also permit power supply to a plurality of charging cables at the same time. In addition, each plug detection switch 32 detects the insertion of each of the power supply plugs 41a to 43a into the charging port 10a. The detection result of the plug detection switch 32 is output to the charging side control unit 31 via the signal lines of the charging cables 41 to 43. In FIG. 1, signal lines between the plug detection switch 32 and the charging side control unit 31 are omitted.

  When the charging-side control unit 31 recognizes that the power supply plugs 41a to 43a are inserted into the charging port 10a through the plug detection switch 32, the charging-side control unit 31 changes the reception circuit 37 from the sleep state to the reception standby state and generates the wake signal Swk. And output to the transmission circuit 38. The transmission circuit 38 modulates the wake signal Swk input from the charging side control unit 31 into an LF band radio wave, and outputs the modulated wake signal Swk to the transmission antenna 38 a through the charging cables 41 to 43. The transmission antenna 38a transmits the wake signal Swk around the power supply plugs 41a to 43a. Precisely, the charging side control unit 31 transmits the wake signal Swk from the transmission antenna 38a corresponding to the power supply plugs 41a to 43a recognized to be inserted into the charging port 10a through the plug detection switch 32. In the example shown in FIG. 2, the power supply plug 41a is inserted into the charging port 10a. For this reason, the wake signal Swk is transmitted to the circular communication area 51 centering on the power supply plug 41a. The communication area 51 is set so as to include the user who holds the power supply plug 41a, and thus the electronic key 20 carried by the user.

  The electronic key 20 existing in the communication area 51 receives the wake signal Swk. The electronic key 20 transmits an ACK signal Sac to the wake signal Swk as described above. As shown in FIG. 2, the ACK signal Sac from the electronic key 20 is an RF band radio wave having a longer signal reach than the LF band, and thus reaches the main body of the charging device 30 that exists outside the communication area 51. To do. Therefore, the receiving antenna 37 a provided in the main body of the charging device 30 can receive the ACK signal Sac from the electronic key 20. The receiving circuit 37 of the charging device 30 demodulates the ACK signal Sac received via the receiving antenna 37 a and outputs the demodulated ACK signal Sac to the charging side control unit 31.

  Here, when a plurality of power supply plugs are respectively inserted in the vehicle, the charging-side control unit 31 transmits any one of the power supply plugs by transmitting the wake signal Swk from the transmission antenna 38a corresponding to the power supply plugs at different timings. It can be recognized whether the electronic key 20 exists in the vicinity. For example, when the first power supply plug 41a and the second power supply plug 42a are respectively inserted into the charging port 10a of the vehicle, the respective transmission antennas 38a in the order of the first power supply plug 41a and the second power supply plug 42a. The wake signal Swk is repeatedly transmitted.

  The charging side control unit 31 recognizes which power supply plugs 41a to 43a are near the electronic key 20 at the timing of receiving the ACK signal Sac. Further, the charging side control unit 31 also determines whether or not the ACK signal Sac from the electronic key 20 accompanying communication between the vehicle 10 and the electronic key 20 is based on the reception timing of the ACK signal Sac. That is, if the ACK signal Sac is received immediately after transmitting the wake signal Swk, the charging side control unit 31 recognizes that the ACK signal Sac corresponds to the wake signal Swk transmitted by itself. When the charging-side control unit 31 receives the ACK signal Sac when it is not immediately after transmitting the wake signal Swk, the charging-side control unit 31 recognizes that it is the ACK signal Sac from the electronic key 20 associated with the communication between the vehicle 10 and the electronic key 20. However, the subsequent processing is not performed because the communication is not related to itself.

  For example, when the charging-side control unit 31 recognizes that the ACK signal Sac is returned in response to the wake signal Swk transmitted from the transmission antenna 38a of the first power supply plug 41a, the charging side control unit 31 is arranged around the first power supply plug 41a. It is recognized that the electronic key 20 exists. Thereafter, the vehicle ID signal Sve, the ACK signal Sac, the challenge signal Scc, and the response signal Sre are exchanged between the charging device 30 and the electronic key 20 in the same manner as the communication between the vehicle 10 and the electronic key 20 described above. Then, the charging-side control unit 31 performs response verification and key ID verification based on the received response signal Sre, and when both verifications are established, the first power supply in which the electronic key 20 exists in the vicinity via the switch circuit 39. Power is supplied only to the plug 41a. As a result, the vehicle to which the first power supply plug 41a is connected can be charged. In the example shown in FIG. 2, power is supplied only to the first power supply plug 41a. Thereby, even if the 2nd electric power feeding plug 42a is inserted in other vehicles, other vehicles are not charged. Note that after the charging is started, the charging is continued even if the electronic key 20 is outside the communication area 51.

  When the charging-side control unit 31 recognizes that the first power supply plug 41a that has been charged is pulled out from the charging port 10a through the plug detection switch 32, the charging-side control unit 31 determines that the charging of the battery unit 13 is completed, The power supply to the power supply plug 41a is cut off through the switch circuit 39. At this time, the reception circuit 37 is returned from the reception standby state to the sleep state. Thus, only in the period when the 1st electric power feeding plug 41a is inserted in the charging port 10a, by making the receiving circuit 37 into a reception standby state, in the communication between the vehicle 10 and the electronic key 20 by the charging device 30. Inadvertent reception of the response signal is suppressed. In addition, power consumption related to reception of the charging device 30 can be reduced.

  The state where the power supply to the first power supply plug 41a in the switch circuit 39 is interrupted is continued again unless the key ID verification and the response verification are established in the charging device 30. Therefore, even if the first power supply plug 41a inserted into the charging port 10a of the vehicle 10 during charging is pulled out illegally and inserted into another vehicle, the user does not carry the legitimate electronic key 20. As long as charging to other vehicles is restricted. The same applies to the case where the ACK signal Sac for the wake signal Swk from the second power supply plug 42a and the third power supply plug 43a is recognized.

  In the memory 31a, a key ID code for a plurality of electronic keys and a vehicle ID code of the vehicle corresponding to the electronic keys are registered. For example, when the charging device 30 is installed in a parking lot of an apartment house, the key ID code of the electronic key 20 of the house contractor and the vehicle ID code of the vehicle corresponding to the electronic key are registered in the memory 31a. When a plurality of vehicle ID codes are registered, charging device 30 continuously transmits vehicle ID signal Sve including different vehicle ID codes after receiving ACK signal Sac for wake signal Swk. Then, the charging device 30 recognizes the electronic key 20 to be communicated at the timing when the ACK signal Sac for the specific vehicle ID signal Sve is returned.

  Next, a charge control program executed by the charge side control unit 31 will be described. The program is executed according to the processing procedure shown in the flowchart of FIG. The program is started when insertion of the power supply plugs 41a to 43a into any of the charging ports 10a is recognized through the plug detection switch 32. At this time, power supply to each of the power supply plugs 41 a to 43 a is cut off through the switch circuit 39.

  First, a request signal is transmitted (S101). Then, it is determined whether or not a response signal has been received (S102). If no response signal is received (NO in S102), the program ends without starting charging. Thereby, the charge by the user who does not carry the electronic key 20 can be prevented, and security can be improved.

  When a response signal, more precisely, a response signal is received (YES in S102), ID verification, that is, key ID verification and response verification is performed (S103). When at least one of key ID verification and response verification is not established (NO in S103), the program is terminated without starting charging, assuming that the electronic key carried by the user is not a regular one. When it is determined that the key ID verification and the response verification are established (YES in S103), charging is started by supplying power to the power supply plug inserted into the charging port 10a at the start of the program through the switch circuit 39 ( S104). Thereby, charging by the user carrying the regular electronic key 20 becomes possible. At this time, charging through the power supply plug located away from the regular electronic key 20 is still restricted. Accordingly, it is possible to prevent a third party from illegally charging a user who carries the legitimate electronic key 20 while being present near the charging device 30.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) Even in a configuration in which the charging device 30 is provided with a plurality of charging cables 41 to 43, only the regular vehicle 10 can be charged. Specifically, a user carrying the regular electronic key 20 connects a specific power plug 41a to the vehicle. At this time, a request signal is transmitted to the electronic key 20 from the transmission antenna 38a of the specific power supply plug 41a. The electronic key 20 transmits a response signal to the received request signal. When the charge-side control unit 31 confirms the validity of the ID code included in the received response signal, the charging-side control unit 31 can supply power only to the specific power supply plug 41a and to other power supply plugs 42a and 43a other than the specific power supply plug 41a. Do not supply power. Accordingly, unauthorized charging by a person who does not carry the regular electronic key 20 using the other power supply plugs 42a and 43a is restricted. Accordingly, security can be maintained even in an environment where a plurality of power supply plugs are used.

  (2) When it is recognized through the plug detection switch 32 that any of the power supply plugs 41a to 43a is connected to the vehicle 10, a request signal is transmitted through the transmission antenna 38a of the power supply plugs 41a to 43a. Here, when connecting the power supply plugs 41a to 43a to the vehicle 10, the user holds the power supply plugs 41a to 43a. Therefore, the electronic key 20 carried by the user can reliably receive the request signal from the transmission antenna 38a.

  Further, by providing the transmission antenna 38a in the power supply plugs 41a to 43a, the communication area 51 formed around the power supply plugs 41a to 43a can be set small. This is because it is sufficient that the communication area 51 is set so as to include a user who holds the power supply plugs 41a to 43a. Thereby, it is suppressed that the charging device 30 communicates with the electronic key 20 which a person other than the user holding the electric power feeding plugs 41a-43a carries.

  (3) The electronic key 20 returns a response signal not only to the charging device 30 but also to a request signal from the vehicle 10. When the vehicle 10 confirms the validity of the ID code included in the response signal from the electronic key 20, the vehicle door can be unlocked. That is, the electronic key 20 can communicate with the charging device 30 without adding a new configuration, program, or the like to the electronic key 20 constituting the electronic key system.

  (4) The power supply plugs 41a to 43a are often subjected to an impact or the like as compared with the main body of the charging device 30 fixed on the ground. Therefore, by providing only the transmission antenna 38 a in the power supply plug and providing the transmission circuit 38 in the main body of the charging device 30, problems with the transmission circuit 38 due to impact or the like can be suppressed.

  (5) In recent years, a lock structure that prevents unauthorized pull-out during charging of the power supply plug inserted into the charging port has been studied. Even in this configuration, power theft due to the replacement of the power plug can be suppressed, but there is a risk of power theft due to forcibly pulling out the power plug or destruction of the lock structure itself. In this respect, in this example, even when the power plug is inserted by a user who does not carry the regular electronic key 20, power is not supplied to the power plug in the first place, so that theft can be more reliably suppressed. . Further, theft can be suppressed without adding the lock structure to the vehicle 10.

  (6) The charging device 30 communicates with the electronic key 20 similarly to the vehicle 10. Therefore, the charging device 30 has the same configuration as the configuration for communicating with the electronic key 20 in the vehicle 10. Specifically, in the charging device 30 and the vehicle 10, common parts can be used for a part of the vehicle side control unit 11 and the charging side control unit 31, the transmission circuits 18 and 38, the reception circuits 17 and 37, and the like. Thereby, the parts dedicated to the charging device can be reduced, and the cost for manufacturing the charging device 30 can be reduced. In addition, the charging device 30 may use the same components as the housing-side device in the electronic key system that locks and unlocks the housing door.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
In the above embodiment, the charging device 30 is provided with a total of three charging cables 41 to 43, but the number of charging cables is not limited to this as long as the number is two or more.

  In the above embodiment, when the power supply plugs 41a to 43a are pulled out from the charging port 10a, the power supply to the power supply plugs 41a to 43a is interrupted. However, the timing for cutting off the power supply to the power supply plugs 41a to 43a is not limited to this, and may be, for example, when a certain time has elapsed. In this case, the charging device 30 includes a timer, and it is determined whether or not a certain time has elapsed from the start of charging through the timer. The charging device cuts off the power supply to the power supply plugs 41a to 43a when a certain time has elapsed from the start of charging.

  In the above embodiment, the charging device 30 communicates with the electronic key in the same manner as the communication between the electronic key and the vehicle in the electronic key system. However, a wireless signal of a different type from the electronic key system may be exchanged between the charging device 30 and the electronic key 20. In this case, the electronic key 20 identifies a request signal from the vehicle 10 and a request signal from the charging device 30. Both signals can be identified by including different information in both request signals. The electronic key 20 returns a radio signal including an ID code in response to a request signal from the charging device 30. This wireless signal is a different type of signal from the response signal. The charging device 30 determines whether or not the electronic key 20 is authorized based on a wireless signal including an ID code from the electronic key. In this example, it is not necessary to store the vehicle ID code in the charging device 30.

In the above embodiment, the portable device is an electronic key that performs wireless communication with the vehicle. However, the portable device may be a dedicated portable device that communicates with only the charging device 30 to enable charging.
In the above embodiment, the request signal from the charging device 30 (power supply plugs 41a to 43a) is an LF band radio wave, and the response signal from the electronic key 20 is an RF band radio wave. However, as long as communication between the charging device 30 and the electronic key 20 is possible, the frequency band of the signal is not limited to these. Further, the communication method is not limited to this. For example, the portable device may be configured as a non-contact type IC card. In this case, the power supply plug is provided with a reader that supplies driving radio waves to the IC card and receives a response signal from the IC card. The user can charge through the power plug by placing the IC card over the power plug. In this case, the vehicle door may be locked and unlocked via the IC card.

  In the above embodiment, the charging device 30 transmits a request signal when recognizing that the power supply plugs 41 a to 43 a are inserted into the charging port 10 a through the plug detection switch 32. However, the charging device 30 may always transmit a request signal from the power plug except during charging. In this case, ID verification is performed through communication between the charging device 30 and the electronic key 20 before inserting the power supply plugs 41a to 43a. Therefore, charging can be started quickly after inserting the power supply plug.

  In the above embodiment, the charging device 30 has recognized that the power supply plugs 41 a to 43 a are inserted into the charging port 10 a through the plug detection switch 32. However, the plug detection switch 32 may be omitted if the insertion of the power supply plugs 41a to 43a can be recognized. In this case, for example, the switch circuit 39 is provided with a current sensor for detecting the conduction state of the charging cables 41 to 43. The current sensor detects that the power supply plugs 41 a to 43 a are inserted into the charging port 10 a based on the conduction state of the charging cables 41 to 43. Thereby, the charge side control part 31 can recognize insertion of the electric power feeding plugs 41a-43a through a current sensor. Moreover, the charge side control part 31 can also recognize the extraction | drawer from the charging port 10a of the electric power feeding plugs 41a-43a by releasing the conduction | electrical_connection state of each charging cable 41-43 through a current sensor.

In the above embodiment, the vehicle 10 is an electric vehicle, but may be a hybrid car that can run on both gasoline and electricity.
Next, the technical idea that can be grasped from the embodiment will be described together with the effects.

  (A) In the charging device according to claim 2, when the control device recognizes that the connection of the specific power supply plug is released through the detection sensor during charging, the power supply to the specific power supply plug is performed. The charging device to cut off.

  According to the configuration, when the connection of the specific power supply plug is released, the power supply to the power supply plug is cut off. Therefore, even when the power supply plug is replaced from a regular vehicle to another vehicle during charging, charging to the other vehicle will not be performed unless there is a user carrying a regular electronic key in the vicinity. .

(B) In the charging device according to any one of claims 1 to 3 and (a) above,
A transmission device for transmitting a request signal modulated to the transmission antenna is provided in a main body of the charging device.

  According to this configuration, by providing only the transmission antenna in the power supply plug and providing the transmission circuit in the main body of the charging device, it is possible to suppress problems in the transmission circuit due to impact or the like.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 20 ... Electronic key, 30 ... Charging apparatus, 31 ... Charging side control part (control apparatus), 32 ... Plug detection switch, 38a ... Transmission antenna, 39 ... Switch circuit, 41-43 ... Charging cable, 41a- 43a: Power supply plug.

Claims (3)

In a charging device that can be connected to a plurality of vehicles via power supply plugs provided at the ends of a plurality of charging cables, and charges each in-vehicle battery by supplying electric power to each vehicle via each charging cable. ,
An ID included in a response signal transmitted from a portable device carried by a user in response to a request signal transmitted from a transmission antenna of a specific power plug while transmitting a request signal through a transmission antenna provided in each power plug A charging device provided with a control device capable of supplying power only to the specific power plug when the validity of the code is confirmed. The charging device according to claim 1,
A detection sensor for detecting whether the power plug is connected to the vehicle;
When the control device recognizes that a specific power supply plug is connected to the vehicle through the detection sensor, the control device transmits a request signal via a transmission antenna of the specific power supply plug. The charging device according to claim 1 or 2,
The vehicle transmits a request signal of the same type as the request signal transmitted through the transmission antenna to the periphery of the vehicle, and checks the validity of the ID code included in the response signal from the portable device with respect to the request signal. A charging device that can unlock the vehicle door when confirmed.

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