JP2005210843A - Power supply system, in-vehicle power supply device, and roadside power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supplying system, a vehicle power supply and a roadside power supply supplying power from the outside of a vehicle when vehicle power is short, supplying power to the outside of the vehicle when the vehicle power is excessive, preventing a capacity of a vehicle battery from increasing, and efficiently utilizing electric power energy. <P>SOLUTION: The power supplying system has the on-vehicle power supply provided with a power request signal transmitting means for transmitting a power request signal for requesting a supply of power to the outside of the vehicle when the quantity of stored power is the predetermined quantity or less, and a power receiving means for receiving power from the outside of the vehicle; and the roadside power supply provided with a power request signal receiving means for receiving the power request signal from the vehicle power supply, and a power transmitting means for transmitting power to the vehicle power supply transmitting the power request signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric power supply system, an in-vehicle power supply device, or a roadside power supply device that can transmit electric power to the outside of the vehicle and receive electric power from the outside of the vehicle.

Conventionally, in order to effectively use the power generation function of a vehicle, there has been proposed an invention in which electric power generated by a vehicle is used outside the vehicle (see, for example, Patent Document 1). According to the invention described in Patent Document 1, power is generated using a generator mounted on a vehicle when the vehicle is stopped, and the generated power is transmitted to the outside of the vehicle.
JP 2001-231106 A

  However, in the invention described in Patent Document 1, the vehicle is utilized by supplying the power of the host vehicle to the outside of the vehicle. However, when the power of the host vehicle is insufficient, the power is supplied from the outside of the vehicle. Can not receive.

  Also, for example, in a hybrid vehicle or an electric vehicle, when the amount of power generated by running or the power generated by regenerative energy is full, a part of the generated power is discarded as surplus power. Yes.

  It is conceivable to install a battery with a large capacity in the vehicle so as not to cause a shortage of electric power of the own vehicle or not to generate waste power. However, when the battery capacity increases in this way, there arises a disadvantage that the capacity of the battery is increased or the weight is increased.

  The present invention has been made in view of the above problems. When the power of the own vehicle is insufficient, the vehicle receives power from the outside of the vehicle. An object of the present invention is to provide a power supply system, a vehicle-mounted power supply device, and a road-side power supply device that can efficiently use power energy without increasing the capacity of the vehicle-mounted battery.

  In order to solve the above problems, the present invention provides a power request signal transmission means for transmitting a power request signal for requesting power supply to the outside of the vehicle when the amount of stored electricity is equal to or less than a predetermined amount, Power receiving means for receiving power, power request signal receiving means for receiving the power request signal from the vehicle power supply, and power transmission toward the vehicle power supply that has transmitted the power request signal And a road-side power supply device including a power transmission means for performing the above-described operation. The roadside power supply device is a power supply device provided in a VICS device, an ETC device, a traffic information sign (electronic bulletin board) device, a traffic light or the like provided on the roadside. Since these VICS devices and the like are installed almost continuously on the road, power can be stably supplied to the vehicle. Moreover, if existing facilities are used, the cost can be reduced. According to the present invention, when the power of the host vehicle is insufficient, the power can be supplied from the outside of the vehicle.

  The present invention also provides a power request signal transmitting means for transmitting a power request signal for requesting power supply to the outside of the vehicle and a power receiving power for receiving power from the outside of the vehicle when the amount of stored electricity is equal to or less than a predetermined amount. A first in-vehicle power supply device comprising: a power request signal receiving means for receiving a power request signal from the first in-vehicle power supply device; And a second in-vehicle power supply device comprising: a power transmission means for transmitting the power stored in the vehicle to the first in-vehicle power supply device based on the result of the determination by the stored power amount determining means. It is characterized by that. According to the present invention, electric power can be supplied from a vehicle to another vehicle between vehicles according to the remaining capacity of the battery of the own vehicle.

  In one embodiment of the present invention, power transmission or reception is performed using electromagnetic waves as a medium. If electromagnetic waves are used, electric power can be supplied without going through a power transmission line or the like, so that even when the vehicle is running, it is possible to supply electric power between the vehicles or between the vehicle and the power supply device. . Further, the power transmission medium may be a laser instead of an electromagnetic wave. Further, power may be supplied between the vehicles or between the vehicle and the power supply device by wire connection.

  The present invention also provides a power request signal transmitting means for transmitting a power request signal for requesting power supply to the outside of the vehicle and a power receiving power for receiving power from the outside of the vehicle when the amount of stored electricity is equal to or less than a predetermined amount. And a vehicle-mounted power supply device.

  Further, the present invention provides a power request signal receiving means for receiving a power request signal for requesting power supply transmitted from another vehicle, and whether or not there is a margin in the amount of charge when the power request signal is received. And a power transmission means for transmitting the stored power to the other vehicle that has transmitted the power request signal based on a result of the determination by the storage amount determination means. An in-vehicle power supply device is provided. According to the present invention, electric power can be supplied from a vehicle to another vehicle between vehicles according to the remaining capacity of the battery of the own vehicle.

  The present invention also provides power request signal receiving means for receiving a power request signal, which is transmitted from a vehicle when the amount of stored power in the in-vehicle power supply device is equal to or less than a predetermined amount, and power for the vehicle that has transmitted the power request signal. And a power transmission means for transmitting the power. In this case, power can be transmitted or received via electromagnetic waves. ADVANTAGE OF THE INVENTION According to this invention, when the electric power of the own vehicle is insufficient, supply of electric power can be received from a roadside power supply device.

  When the power of the host vehicle is insufficient, the capacity of the in-vehicle battery is increased by receiving the power supply from the outside of the vehicle and supplying the power to the outside of the vehicle when there is a margin in the power of the host vehicle. Therefore, it is possible to provide a power supply system, an in-vehicle power supply device, and a roadside power supply device that can efficiently use electric power energy.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  Electric power can be transmitted to physically distant places that are not electrically connected by a transmission line or the like, using electromagnetic waves or the like as a medium. In this embodiment, a mode in which power is transmitted mainly using electromagnetic waves or the like will be described.

  Fig.1 (a) shows the schematic of the electric power supply system comprised by the vehicle which can transmit / receive electric power. The power supply system includes a vehicle power supply device 10 mounted on a vehicle and a roadside power supply device 50 installed on a road or roadside.

  The in-vehicle power supply device 10 and the roadside power supply device 50 are configured to include the antenna 12, the antenna 11, the oscillation / rectifier circuit 13, and the control unit 14, respectively. Each of the in-vehicle power supply device 10 and the roadside power supply device 50 transmits and receives power via the antenna 12. The antenna 11 is an antenna for transmitting a data signal. When power is transmitted, the control unit 14 causes the oscillation / rectification circuit 13 to emit electromagnetic waves from the antenna 12. When receiving power supply, the control unit 14 transmits the electromagnetic waves received by the antenna 12 using the oscillation / rectification circuit 13. Rectify. Details of the antenna 12 will be described later.

  The in-vehicle power supply device 10 can receive power from the roadside power supply device 50 when power is insufficient, and can transmit power to the roadside power supply device 50 when there is a margin in power. The vehicle on which the in-vehicle power supply device 10 is mounted may be a vehicle driven only by a prime mover, but a hybrid vehicle or an electric vehicle that can drive the vehicle with electric power is suitable. In a hybrid vehicle or the like, electric power is supplied from the road-side power supply device 50, and the vehicle can be driven by an electric motor using the electric power.

  The road-side power supply device 50 can receive power transmission, storage, and power supply in the same manner as the in-vehicle power supply device 10. The road-side power supply device 50 is supplied with power from, for example, a power plant or a substation, and has sufficient power to supply power to the in-vehicle power supply device 10.

The roadside power supply device 50 is provided on the roadside. More preferably, it is preferable to use roadside equipment provided on the roadside. FIG.1 (b) shows an example of the roadside apparatus provided in the roadside. Since the ITS (Intelligent Transport Systems) environment has been prepared on the roadside as part of the realization of the intelligent transportation system, VICS (Vehicle
Roadside equipment such as equipment 41 for information and communication system, equipment 43 for ETC (Electronic Toll Collection System), and traffic information sign (electronic bulletin board) 42 is installed. The power supply system of the present embodiment can be realized with a minimum cost by using these roadside devices.

  Next, the functional configuration of the vehicle including the on-vehicle power supply device 10 will be described in detail. FIG. 2 is a functional configuration diagram of an in-vehicle device for a hybrid vehicle applied to the power supply system according to the embodiment of the present invention. In this embodiment, the in-vehicle device includes an electronic control unit (hereinafter referred to as ECU) 30 and is controlled by the ECU 30. The ECU 30 controls the driving force of the engine 28 and the motor 16 to drive the vehicle.

  The vehicle includes an axle 27 that connects the wheels FL and FR. A motor 16 is connected to the axle 27. A changeover switch 22 is electrically connected to the motor 16. A battery 15 is electrically connected to the changeover switch 22 via an inverter 23. The changeover switch 22 is connected to the ECU 30 and switches the conduction state of the motor 16 and the inverter 23 according to a command signal from the ECU 30.

  The motor 16 generates driving torque for driving the wheels FL and FR when electric power is supplied from the battery 15 via the inverter 23 in a state where the motor 16 and the inverter 23 are electrically connected. In addition, when torque is input from the wheel side, the motor 16 functions as a generator that generates electric power by converting the torque into electric energy. The regenerative power generated by the motor 16 is collected by the battery 15 when the motor 16 and the inverter 23 (with a converter function) are conducted.

  The inverter 23 is connected to the ECU 30 and is controlled by the ECU 30. The ECU 30 controls the inverter 23 so that electric power corresponding to the requested driving torque is supplied to the motor 16 when the generation of the driving torque is requested in the vehicle. When the electric power is supplied from the inverter 23, the motor 16 generates a driving torque corresponding to the electric power.

  The vehicle also includes a brake pedal (not shown) that is operated to brake the vehicle, and a brake actuator 25 that generates a braking force on the wheels FL, FR, RL, and RR. The brake pedal is provided with a brake stroke sensor 26 that detects a brake operation amount. The brake stroke sensor 26 outputs an electrical signal corresponding to the operation amount of the brake pedal. An output signal from the brake stroke sensor 26 is supplied to the ECU 30. The ECU 30 detects the operation amount of the brake pedal based on the output signal of the brake stroke sensor 26. The brake actuator 25 is connected to the ECU 30 and is driven when a drive signal corresponding to the operation amount of the brake pedal is supplied from the ECU 30 to generate braking force on the wheels FL, FR, RL, and RR.

  A battery voltage sensor 24 is connected to the ECU 30. The battery voltage sensor 24 outputs an electrical signal corresponding to a voltage between terminals of the battery 15 (hereinafter referred to as battery voltage) VBAT. The ECU 30 detects the battery voltage VBAT based on the output signal of the battery voltage sensor 24. The state of charge of the battery, that is, the remaining capacity is detected based on the battery voltage, the battery current (not shown), and the battery temperature.

  The antenna 12 will be described. When electromagnetic waves reach the antenna 12 from the outside of the vehicle, the electromagnetic waves are rectified and collected by the battery 15. That is, when receiving the supply of electric power, the antenna 12 generates an electric current in response to a change in the magnetic field of the received electromagnetic wave by an electromagnetic induction effect. The generated current is rectified by the oscillation / rectifier circuit 13 and stored in the battery 15. When the antenna 12 transmits power, the oscillation / rectifier circuit 13 emits electromagnetic waves from the antenna 12 using the power of the battery 15. The antenna 12 is formed of, for example, a coiled conductor, and the number of turns of the coil and the diameter of the conductor are designed according to the frequency of the electromagnetic wave. The antenna 12 may be a rectenna, for example. In the rectenna, a diode detection circuit is provided for each of a plurality of small dipole antennas. The rectenna mainly receives microwaves and synthesizes the rectified output obtained from the microwaves to extract a direct current. In addition, this embodiment is characterized in that power is transmitted to a distant place without using a power transmission line or the like, and thus, for example, a laser may be used as a medium for supplying power. Since the laser has a high energy density, the power transmission efficiency is improved. When a laser is used, the antenna 12 is formed by a laser oscillation device and a photoelectric conversion element that converts the laser into electric power.

  A control unit 14 is connected to the transmission / rectifier circuit 13, and an ECU 30 is connected to the control unit 14. The ECU 30 outputs a control signal to the control unit 14 so as to receive power transmission or supply. Based on the control signal, the control unit 14 transmits power from the battery 15 and receives electromagnetic waves from other vehicles and receives power.

  In FIG. 2, the antenna 12 is installed in the front and back of the vehicle. In the case of using a highly directional medium such as a microwave or a laser for power transmission, it is preferable to install the vehicle-mounted power supply device 10 and the antenna 12 of the roadside power supply device 50 so that they can face each other. In addition, when electromagnetic waves are used for power transmission, the power transmitted is generally inversely proportional to the square of the distance, so the antenna is arranged so that the distance between the in-vehicle power supply 10 and the roadside power supply 50 is shortened. 12 is preferably installed. Therefore, the number of antennas 12 is not limited to two and may be three or more, or one antenna 12 may be provided at an appropriate location.

  The ECU 30 is connected to the data transmission / reception device 21, and the data transmission / reception device 21 is connected to the antenna 11. The in-vehicle power supply device 10 recognizes the presence of the roadside power supply device 50 based on data signals transmitted and received by the antenna 11. That is, the antenna 11 and the data transmitter / receiver 21 are a road-to-vehicle communication device that transmits and receives various data signals such as FM and light / radio wave beacons from roadside devices (infrastructure equipment), and a vehicle that transmits and receives data signals between vehicles. It functions as an intercommunication device.

  A present Example is described based on the above structure. The ECU 30 of the vehicle checks the remaining capacity of the battery 15 at predetermined time intervals or receives a signal from the battery voltage sensor 24 notifying that the battery voltage has dropped below a predetermined value, and the remaining capacity of the battery 15 is insufficient. Detect that When detecting that the remaining capacity of the battery is insufficient, the ECU 30 uses the antenna 11 to generate a data signal (hereinafter referred to as a power request signal) indicating that the remaining capacity of the battery of the vehicle is insufficient. Send to. The roadside power supply device 50 that has received the power request signal transmits power from the power supply to the in-vehicle power supply device 10 via the antenna 12 through electromagnetic waves or the like. As a result, the in-vehicle power supply device 10 can increase the remaining capacity of the battery 15.

  When the power supply cannot be received for a time sufficient to charge the battery 15, the next road-side power supply device 50 is detected and a power request signal is transmitted to the road-side power supply device 50. By repeating this, the in-vehicle power supply device 10 can compensate for the shortage of the remaining capacity of the battery 15.

  Further, as a result of recovering regenerative energy or the like by the in-vehicle power supply device 10, if there is a margin in the remaining capacity, surplus power is transmitted to the road-side power supply device 50. During traveling, the vehicle confirms the presence of the road-side power supply device 50 using the antenna 11, and transmits power to the antenna 12 of the road-side power supply device 50 when it can be confirmed. The roadside power supply device 50 stores the supplied power, and transmits the supplied power to the vehicle when there is a power request signal from another vehicle. Thereby, the regenerative energy etc. which the vehicle-mounted power supply device 10 collect | recovered are utilized effectively.

  According to the present embodiment, it is possible to mutually supply power between the vehicle and the roadside device using the existing roadside device. The roadside equipment is installed almost continuously on the road and tends to be added in the future, so that the vehicle can receive a stable power supply. For example, in a hybrid vehicle or an electric vehicle, electric power is used when starting and accelerating. In this embodiment, power can be supplied from the road-side power supply device 50 included in the road-side equipment. Further, even when the battery is full due to the regenerative energy collected during braking, the surplus power can be transmitted to and stored in the roadside power supply device 50 without being discarded. Therefore, it is possible to efficiently use the electric energy of the vehicle without increasing the capacity of the in-vehicle battery such as a hybrid vehicle.

  In the first embodiment, the power supply system that mutually supplies power between the vehicle and the roadside device has been described. In the second embodiment, a power supply system that supplies power to each other between vehicles will be described. When wireless data communication is possible between vehicles as in inter-vehicle communication, it is possible to supply power to each other together with the data signal.

  FIG. 3 is a schematic diagram of a power supply system according to the second embodiment. In the power supply system of FIG. 3, the in-vehicle power supply device 10 and the in-vehicle power supply device 20 can mutually supply the electric power stored in each vehicle by the antenna 12. The functional configurations of the in-vehicle power supply device 10, the in-vehicle power supply device 20, and the vehicle have been described with reference to FIG.

  Based on the configuration of FIG. 3, an operation in which the in-vehicle power supply device 10 receives power supply from the in-vehicle power supply device 20 will be described. FIG. 4 shows an activity diagram of an operation in which the in-vehicle power supply apparatus 10 receives power supply from the in-vehicle power supply apparatus 20. For example, this operation is started when the remaining capacity of the battery 15 of the in-vehicle power supply device 10 is insufficient during traveling. The vehicle may be running or stopped.

  In step S <b> 11, the in-vehicle power supply device 10 transmits a data signal (hereinafter referred to as a power request signal) to the effect that the remaining capacity of the battery of the own vehicle is insufficient using the antenna 11. For example, the ECU 30 checks the remaining capacity of the battery 15 at predetermined time intervals, or receives a signal from the battery voltage sensor 24 indicating that the battery voltage has dropped below a predetermined value, and the remaining capacity of the battery 15 is insufficient. Detect that The shortage of the remaining capacity of the battery 15 may be detected by dividing the remaining capacity into several stages from a state where the amount is slightly insufficient to a state where the amount is very small. The in-vehicle power supply device 20 that supplies power can adjust the amount of power to be supplied in accordance with the remaining capacity of the battery 15 of the in-vehicle power supply device 10.

  In step S12, the in-vehicle power supply device 20 that has received the power request signal checks the remaining capacity of the battery of the own vehicle. As a result of checking the remaining capacity, if the power is not sufficient to be supplied to the in-vehicle power supply device 10, a power transmission impossible signal indicating that power cannot be transmitted is transmitted to the in-vehicle power supply device 10.

  In step S <b> 13, the in-vehicle power supply device 10 receives a power transmission impossible signal from the in-vehicle power supply device 20. Since the power supply cannot be received, the operation based on the current power request signal ends.

  If there is surplus power to be transmitted to the in-vehicle power source device 10 as a result of the remaining capacity check, in step S14 and step 15, the in-vehicle power source device 20 transmits power to the in-vehicle power source device 10 using electromagnetic waves as a medium. The power supply device 10 receives the power from the in-vehicle power supply device 20. When the transmission of the predetermined amount of power ends, the operation based on the current power request signal ends.

  In the power supply system of the present embodiment, it is possible to supply power to each other without the roadside power supply device 50 on the road.

  Further, as described with a dotted line in FIG. 3, a road-side power supply device 50 may be installed so that power can be supplied to and from the road-side power supply device 50 as in the first embodiment. In a so-called AdHoc communication network (ubiquitous network), wireless data communication can be performed not only between vehicles but also between a vehicle and a roadside device. For example, the in-vehicle power supply device 10 first detects the roadside power supply device 50 by wireless data communication, and transmits a power request signal to another vehicle when the roadside power supply device 50 does not exist nearby. If the road-side power supply device 50 with a large power supply capacity is detected first, sufficient power can be supplied.

  Further, the in-vehicle power supply device 10 may transmit the power request signal to the in-vehicle power supply device 20 before the roadside power supply device 50. If priority is given to the supply of electric power between the vehicles, the electric power generated by the vehicles can be used effectively, and the use of the electric power of the road-side power supply device 50 that is costly for power generation and power transmission can be reduced. Further, the power request signal may be transmitted without distinguishing between the road-side power supply device 50 and the in-vehicle power supply device 20. In such a power supply system, power can be supplied from an appropriate power source according to the location of the road-side power supply device 50 and the vehicle-mounted power supply device 20 with respect to the vehicle-mounted power supply device 10 and the remaining capacity of the battery 15 of the vehicle-mounted power supply device 20. it can.

  In this embodiment, even if there is no roadside power supply device 50 on the road, it is possible to receive power supply. Moreover, when the roadside device has the roadside power supply device 50, it is possible to supply electric power to an appropriate power source among the vehicle and the roadside power supply device 50.

  In the first and second embodiments, the power supply system that supplies power between two adjacent vehicles or between the vehicle and the road-side power supply device 50 has been described. In the third embodiment, a power supply system that supplies power between vehicles that can communicate with each other using an AdHoc communication network will be described.

  By using the above-described AdHoc communication network, for example, when a plurality of vehicles are continuously running or stopped not only between two vehicles, wireless data communication is performed between the last vehicle and the first vehicle, for example. be able to. Therefore, if wireless data communication is possible, it becomes possible to mutually supply power together with the data signal between the last vehicle and the first vehicle.

  FIG. 5A shows a schematic diagram of a power supply system according to the third embodiment. In the power supply system of FIG. 5A, the in-vehicle power supply device 10 and the in-vehicle power supply device 20 can supply power to each other via the vehicles 1a and 1b. The vehicle 1 a or 1 b has the same in-vehicle power supply device as the in-vehicle power supply device 10. Therefore, the vehicle 1a and the vehicle 1b can mutually transmit the electric power stored in each vehicle via the antenna 12.

  First, the in-vehicle power supply device 10 transmits an electric power request signal to the vehicle 1 a using the antenna 11. For example, the ECU 30 checks the remaining capacity of the battery 15 at predetermined time intervals, or receives a signal from the battery voltage sensor 24 indicating that the battery voltage has dropped below a predetermined value, and the remaining capacity of the battery 15 is insufficient. Detect that

  The vehicle 1a checks the remaining capacity of the battery 15 of the own vehicle. As a result of the check, if the power can be transmitted, the power is transmitted to the in-vehicle power supply device 10, but if the remaining capacity is not enough, the power request signal transmitted from the in-vehicle power supply device 10 is transmitted to the vehicle 1b. .

  The vehicle 1b that has received the power request signal checks the remaining capacity of the battery 15 of the own vehicle, similarly to the vehicle 1a. As a result of the check, if electric power can be transmitted, the electric power is transmitted to the vehicle 1a, and then the vehicle 1a transmits the electric power to the in-vehicle power supply device 10. When there is no margin in the remaining capacity, the power request signal transmitted from the vehicle 1a is transmitted to the in-vehicle power supply device 20.

  The in-vehicle power supply device 20 that has received the power request signal checks the remaining capacity of the battery 15 of the own vehicle, and transmits power to the vehicle 1b if power transmission is possible, and then the vehicle 1b supplies power to the vehicle 1a. Then, the vehicle 1a transmits power to the in-vehicle power supply device 10. That is, the in-vehicle power supply device 10 can receive power from the in-vehicle power supply device 20 via the vehicles 1b and 1a.

  In the power supply system as shown in FIG. 5A, it is possible to receive power from not only adjacent vehicles but also from the leading vehicle of a plurality of continuous vehicles. It is also possible to receive power supply from a plurality of vehicles as well as from a predetermined vehicle such as the leading vehicle. Therefore, the opportunity to mutually supply electric power increases, and the electric power generated by the vehicle can be used more effectively.

  Also in this embodiment, it is possible to mutually supply electric power using roadside equipment. FIG. 5B is different from FIG. 5A in that it has traffic lights 45a and 45b as roadside devices and a power transmission line 60 disposed in the basement of the road 51 and the like. The traffic lights 45a and 45b are electrically connected to each other and to other traffic lights (not shown) via a power transmission line 60 for supplying power to turn on the signals. The traffic light 45a and the like are provided with an antenna 11 for transmitting and receiving data signals and an antenna 12 for supplying power. Therefore, in the power supply system as shown in FIG. 5B, wireless data communication is possible through the AdHoc communication network, and power is transmitted from the in-vehicle power supply device 20 to the traffic light 45b and transmitted via the power transmission line 60, for example. Can be supplied to the in-vehicle power supply device 10 from another traffic light 45a.

  The operation of the power supply system in FIG. FIG. 6 shows an activity diagram of an operation in which the in-vehicle power supply apparatus 10 receives power supply from the in-vehicle power supply apparatus 20 via the power transmission line 60. For example, this operation is started when the remaining capacity of the battery 15 is insufficient during traveling. The vehicle may be running or stopped. Further, the in-vehicle power supply device 10 requests power supply, and the in-vehicle power supply device 20 is a power supply device for the rearmost vehicle or the first vehicle in the range where communication is possible through the AdHoc communication network.

  In step S101, the vehicle-mounted power supply device 10 transmits a power request signal to the vehicle 1a using the antenna 11. For example, the ECU 30 checks the remaining capacity of the battery 15 at predetermined time intervals, or receives a signal from the battery voltage sensor 24 indicating that the battery voltage has dropped below a predetermined value, and the remaining capacity of the battery 15 is insufficient. Detect that

  In step S102, the vehicle 1a that has received the power request signal checks the remaining capacity of the battery 15 of the vehicle. As a result, when the remaining capacity is sufficient, power is transmitted in step S104, and when there is no margin in the remaining capacity, a power request signal is transmitted to the adjacent vehicle 1b. There may be a plurality of vehicles between the vehicle 1a and the vehicle 1b. In that case, each vehicle repeats the check operation of the battery 15 and the transmission of the power request signal.

  In step S103, the vehicle 1b that has received the power request signal checks the remaining capacity of the battery 15 of the vehicle. If the remaining capacity is sufficient, the vehicle 1b transmits electric power in step S105, and if there is not enough room, the vehicle 1b transmits a power request signal to the adjacent on-vehicle power supply device 20.

  In step S106, the in-vehicle power supply device 20 that has received the power request signal checks the remaining capacity of the battery 15 of the own vehicle. When the remaining capacity is sufficient, the in-vehicle power supply 20 transmits power to the traffic light 45b, and when the in-vehicle power supply 20 does not have enough power to be supplied to the in-vehicle power supply 10, it can communicate with the AdHoc communication network. Transmits a power transmission disable signal notifying that there is no vehicle capable of supplying power to the vehicle 1b. The vehicle 1b transmits a power transmission disabled signal to the vehicle 1a, and then the vehicle 1a receives the power transmission disabled signal in step S110. If there is no vehicle that can transmit power, the operation based on the current power request signal ends.

  In step S <b> 107, the traffic light 45 b receives power from the in-vehicle power supply device 20. The traffic light 45 b transmits the transmitted power to the traffic light 45 a via the power transmission line 60. Thereby, the electric power which the vehicle-mounted power supply device 10 requires was transmitted to the road side apparatus near the vehicle-mounted power supply device 10.

  In step S108 and step S109, the traffic light 45a supplies power to the in-vehicle power supply device 10. As a result, the in-vehicle power supply device 10 can receive power supply based on the transmitted power request signal. When the in-vehicle power supply device 10 receives power supply, the operation in FIG. 6 ends.

  If a power storage device capable of storing electric power is provided in the power transmission line 60, the traffic light 45b, etc., the power transmitted from the in-vehicle power supply device 20 to the traffic light 45b is used when the power transmission efficiency is high. Electric power can be transmitted from 45b to the in-vehicle power supply device 10. On the other hand, when the power storage device is not provided, the transmitted power can be transmitted from the traffic light 45b to the traffic light 45a without performing rectification or the like, so that the cost of the facility can be reduced.

  Further, the power transmission line 60 may be embedded in a guard rail, a center line, or the like. The roadside device that transmits and receives power and data communication is not limited to the traffic light 45a, and may be the VICS device 41, the traffic information sign 42, the ETC device 43, and the like described above.

  According to the present embodiment, opportunities for supplying power to each other increase, and power is transmitted via the transmission line 60. Therefore, loss of power during power transmission can be reduced, and efficient power transmission is possible. It becomes possible.

  As described above, according to the present embodiment, power can be supplied between the vehicle and the roadside device and between the vehicle and the vehicle. Since the roadside device having the roadside power supply device 50 can use the existing roadside device, it can be realized at low cost. A part of the electric power used for starting and accelerating depends on the road-side power supply device 50, and surplus electric power in the recovered regenerative energy is transmitted to the road-side power supply device 50, so that the power unit such as the vehicle battery 15 is small and lightweight. Can be realized. Further, even if there are no nearby vehicles having sufficient remaining capacity of the road-side power supply device 50 and the battery 15, electric power can be transmitted between the vehicles in a range where wireless data communication is possible. That is, when the power of the host vehicle is insufficient, power is supplied from the outside of the vehicle, and when the power of the host vehicle has a margin, the power is supplied to the outside of the vehicle, thereby reducing the capacity of the in-vehicle battery. Efficient utilization of electric power energy can be achieved without increasing the size.

It is the schematic of the electric power supply system comprised by the vehicle and roadside power supply device which can supply electric power mutually. It is a functional block diagram of the vehicle-mounted apparatus of the vehicle applied to the electric power supply system which is one Example of this invention. It is the schematic of the electric power supply system in Example 2. FIG. It is an example of the activity diagram of the operation | movement which supplies electric power between vehicles. It is the schematic of the electric power supply system in Example 3. FIG. It is an example of the activity diagram of the operation | movement which supplies electric power via a power transmission line.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 20 Car-mounted power supply device 11, 12 Antenna 13 Oscillation / rectification circuit 14 Control part 15 Battery 16 Electric motor 24 Battery voltage sensor 30 ECU
41 VICS equipment 42 Traffic information sign 43 ETC equipment 50 Roadside power supply

Claims (8)

A power request signal transmitting means for transmitting a power request signal for requesting power supply to the outside of the vehicle and a power receiving means for receiving power from the outside of the vehicle when the amount of stored electricity is a predetermined amount or less; An in-vehicle power supply,
A road-side power supply device comprising: a power request signal receiving unit that receives the power request signal from the vehicle-mounted power supply device; and a power transmission unit that transmits power toward the vehicle-mounted power supply device that has transmitted the power request signal. ,
A power supply system comprising: A power request signal transmitting means for transmitting a power request signal for requesting power supply to the outside of the vehicle and a power receiving means for receiving power from the outside of the vehicle when the amount of stored electricity is a predetermined amount or less; A first in-vehicle power supply device;
Results of determination by power request signal receiving means for receiving the power request signal from the first in-vehicle power supply device, power storage amount determination means for determining whether or not there is a margin in the power storage amount, and the determination by the power storage amount determination means A second on-vehicle power supply device comprising: a power transmission means for transmitting the electric power stored in the vehicle to the first on-vehicle power supply device;
A power supply system comprising:   The power supply system according to claim 1, wherein the power transmission unit transmits power through electromagnetic waves. A power request signal transmitting means for transmitting a power request signal for requesting power supply to the outside of the vehicle when the amount of stored power is a predetermined amount or less;
Power receiving means for receiving power from outside the vehicle;
An in-vehicle power supply device comprising: A power request signal receiving means for receiving a power request signal for requesting power supply transmitted from another vehicle;
When receiving the power request signal, the storage amount determination means for determining whether there is a margin in the storage amount;
Based on the result of determination by the storage amount determination means, power transmission means for transmitting the stored power to the other vehicle that has transmitted the power request signal;
An in-vehicle power supply device comprising:   6. The on-vehicle power supply device according to claim 5, wherein the power transmission means transmits power to another vehicle through electromagnetic waves. Power request signal receiving means for receiving a power request signal for requesting supply of power transmitted from the vehicle;
Power transmission means for transmitting power to the vehicle that transmitted the power request signal;
A road-side power supply device comprising:   The road-side power supply device according to claim 7, wherein the power transmission unit transmits power toward the vehicle via electromagnetic waves.

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