Abstract:
Provided is an electric power supply device that supplies electric energy from the outside of a vehicle ( 10 ) to the vehicle ( 10 ). A PLC unit ( 202 ) acquires from the vehicle ( 10 ) the unique information (vehicle unique information) of the vehicle ( 10 ) stored in the vehicle ( 10 ). A server communication unit ( 203 ) acquires, from a server ( 30 ) for comparing the vehicle unique information with stolen vehicle information, the compared result. When the vehicle unique information does not match the stolen vehicle information, a control unit ( 206 ) allows the electric energy to be supplied from a power output unit ( 204 ) to the vehicle ( 10 ). In contrast, when the vehicle unique information matches the stolen vehicle information, the control unit ( 206 ) allows the electric energy stored in a battery ( 106 ) mounted on the vehicle ( 10 ) to be discharged from the battery ( 106 ) and dissipated by a power consuming unit ( 207 ).

Description:
TECHNICAL FIELD 
     The present invention relates to an electric supply apparatus supplying electric energy to a vehicle including a storage battery, from the outside of the vehicle. 
     BACKGROUND ART 
     Some conventional electric supply apparatuses are configured to receive unique information on vehicles through power lines, to check the unique information against stolen-vehicle information, and to stop supplying power to the vehicle when the unique information coincides with the stolen-vehicle information (for example, refer to Patent Literature (hereinafter, abbreviated as PTL) 1). 
     CITATION LIST 
     Patent Literature 
     PTL 1 
     
         
         Japanese Patent Application Laid-Open No. 2010-134566 
       
    
     SUMMARY OF INVENTION 
     Technical Problem 
     However, even if the conventional electric supply apparatus (PTL 1) stops supplying power to the stolen vehicle as described above, the stolen vehicle can run for a considerable distance when sufficient electric energy is accumulated in the storage battery of the stolen vehicle. Therefore, even if the above-described conventional electric supply apparatus is used, it may be difficult to find the stolen vehicle. Thus, the use of the above-described conventional electric supply apparatus is not fully effective in reducing theft. 
     It is an object of the present invention to provide an electric supply apparatus that makes it easier to find a stolen vehicle and that makes it possible to enhance the effect of reducing theft. 
     Solution to Problem 
     An electric supply apparatus according to an aspect of the present invention supplies electric energy to a vehicle from outside of the vehicle, the apparatus including: an electric power output section that serves as a supply source of electric energy; a reception section that receives electric energy; a first communication section that communicates with the vehicle and acquires unique information from the vehicle, the unique information being stored in the vehicle and uniquely identifying the vehicle; a second communication section that communicates with a server configured to check the unique information against stolen-vehicle information and that acquires a checking result from the server; and a control section that supplies electric energy from the electric power output section to the vehicle when the unique information does not coincide with any piece of the stolen-vehicle information in the checking result, and when the unique information coincides with any one piece of the stolen-vehicle information in the checking result, the control section discharges electric energy accumulated in a storage battery included in the vehicle, from the storage battery, and causes the reception section to receive the electric energy. 
     Advantageous Effects of Invention 
     According to the present invention, a stolen vehicle can be easily found, and the effect of reducing theft can be enhanced. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a block diagram illustrating a configuration of an electric supply apparatus and a vehicular electric source apparatus according to Embodiment 1 of the present invention; 
         FIG. 2  is a processing flowchart of a charge/discharge process according to Embodiment 1 of the present invention; 
         FIG. 3  is a block diagram illustrating a configuration of an electric supply apparatus and a vehicular electric source apparatus according to Embodiment 2 of the present invention; 
         FIG. 4  is a processing flow diagram of a charge/discharge process according to Embodiment 2 of the present invention; 
         FIG. 5  is a block diagram illustrating a configuration of an electric supply apparatus and a vehicular electric source apparatus according to Embodiment 3 of the present invention; 
         FIG. 6  is a processing flowchart of a charge/discharge process according to Embodiment 3 of the present invention; 
         FIG. 7  is a block diagram illustrating a configuration of an electric supply apparatus and a vehicular electric source apparatus according to Embodiment 4 of the present invention; 
         FIG. 8  is a graph illustrating a situation of charge according to Embodiment 4 of the present invention; and 
         FIG. 9  is an example of an image display according to Embodiment 4 of the present invention. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The embodiments of the present invention will be described with reference to the accompanying drawings. 
     (Embodiment 1) 
     As illustrated in  FIG. 1 , electric supply apparatus  20  is connected to server  30 . Server  30  stores stolen-vehicle information on each of a plurality of stolen vehicles as a stolen-vehicle database. Electric supply apparatus  20  supplies electric energy to vehicle  10  from the outside of vehicle  10 . Electric supply apparatus  20  additionally supplies electric energy to vehicle  10  through an electric power supply line. 
     As illustrated in  FIG. 1 , electric supply apparatus  20  includes electric supply plug  201 , PLC (Power Line Communications) section  202 , server communication section  203 , electric power output section  204 , selector switch  205 , control section  206 , and power consumption section  207 . 
     Electric supply apparatus  20  supplies electric energy to vehicle  10  from electric power output section  204  through selector switch  205 , PLC section  202 , and electric supply plug  201 , and consumes electric energy (electric discharge energy) discharged from storage battery  106  included in vehicle  10 , using power consumption section  207 . 
     PLC section  202  performs power line communication with PLC section  102  through electric supply plug  201 , lid portion  101 , and the electric power supply line of vehicle  10 . PLC section  202  acquires unique information (vehicle unique information) uniquely identifying vehicle  10  from vehicle  10  through this power line communication, outputs the resultant information to control section  206 , and also transmits a charge/discharge start signal generated by control section  206 , to vehicle  10 . The vehicle unique information is inputted to server communication section  203  through control section  206 . 
     Server communication section  203  communicates with server  30  and transmits the vehicle unique information to server  30 . Server communication section  203  also acquires a checking result in server  30  and outputs the result to control section  206 . 
     Server  30  checks the vehicle unique information received from server communication section  203  against each piece of stolen-vehicle information in the stolen-vehicle database, and transmits a checking result of whether the vehicle unique information coincides with any piece of the stolen-vehicle information, to server communication section  203 . The checking result is inputted to control section  206  through server communication section  203 . 
     Here, the vehicle unique information and stolen-vehicle information may be information that can uniquely identify each vehicle, such as a frame number, the registration number of a vehicle, or a specific vehicle ID. 
     Electric power output section  204  is a supply source (electric source) of electric energy supplied to vehicle  10 . When electric supply apparatus  20  is installed in a standard home, electric power output section  204  is a home electric source and outputs, for example, AC electric energy of approximately 100 to 240V. When electric supply apparatus  20  is installed as a charge stand, electric power output section  204  outputs, for example, DC electric energy of approximately 400V. An output control on electric energy from electric power output section  204  (whether to output electric energy) is performed by control section  206 . 
     Power consumption section  207  receives and consumes electric discharge energy. Power consumption section  207  is, for example, a resistance having high impedance. As described above, the present embodiment includes power consumption section  207  serving as a receiver of electric discharge energy. 
     Control section  206  controls selector switch  205  and electric power output section  204  according to the checking result inputted from server communication section  203 . 
     That is, when the vehicle unique information does not coincide with any piece of the stolen-vehicle information, control section  206  connects selector switch  205  to electric power output section  204  to connect electric power output section  204  and electric supply plug  201  through PLC section  202 , and outputs electric energy from electric power output section  204 . Thereby, control section  206  supplies electric energy to vehicle  10  from electric power output section  204  through selector switch  205 , PLC section  202 , and electric supply plug  201 . On the other hand, when the vehicle unique information coincides with any one piece of the stolen-vehicle information, control section  206  connects selector switch  205  to power consumption section  207  to connect electric supply plug  201  and power consumption section  207  through PLC section  202 , and does not output electric energy from electric power output section  204 . Thereby, control section  206  causes power consumption section  207  to receive and consume electric discharge energy. 
     As shown in  FIG. 1 , vehicular electric source apparatus  100  is installed in vehicle  10 . Vehicular electric source apparatus  100  includes lid portion  101 , PLC section  102 , charger  103 , inverter  104 , electric motor  105 , storage battery  106 , relays  107  to  110 , control section  111 , and storage section  112 . 
     In vehicular electric source apparatus  100 , electric supply plug  201  is inserted at an electrode provided in lid portion  101 , from the outside of vehicle  10 . Thereby, vehicular electric source apparatus  100  can receive supply of electric energy from electric supply apparatus  20  to accumulate this electric energy in storage battery  106 , and also transmit electric discharge energy to electric supply apparatus  20 . Vehicular electric source apparatus  100  can also perform power line communication with electric supply apparatus  20  by inserting electric supply plug  201  at the electrode provided in lid portion  101  from the outside of vehicle  10 . 
     Lid portion  101  can be attached/detached or opened/closed by the user of vehicle  10 . The user of vehicle  10  inserts electric supply plug  201  in lid portion  101  from the outside of vehicle  10  to perform charge for vehicle  10 . Electric supply plug  201  is inserted at the electrode included in lid portion  101 . Thereby, the electrode of electric supply plug  201  is contacted with the electrode of lid portion  101 . This enables supply of electric energy from electric supply apparatus  20  to vehicle  10 , transmission of electric discharge energy from vehicle  10  to electric supply apparatus  20 , and power line communication with electric supply apparatus  20 . Electric energy supplied from electric supply apparatus  20  is accumulated in storage battery  106  through PLC section  102 , charger  103 , and relays  109  and  110 . On the other hand, electric discharge energy outputted from storage battery  106  is transmitted to electric supply apparatus  20  through relays  109  and  110 , charger  103 , PLC section  102 , and lid portion  101 . 
     PLC section  102  performs power line communication with PLC section  202  of electric supply apparatus  20  through lid portion  101  and electric supply plug  201 . Thereby, PLC section  102  acquires a charge/discharge start signal from electric supply apparatus  20  to output the signal to control section  111 , and also transmits vehicle unique information inputted from control section  111 , to electric supply apparatus  20 . 
     When AC electric energy is supplied from electric supply apparatus  20 , charger  103  converts this AC electric energy in DC electric energy and outputs the resultant electric energy. On the other hand, when DC electric energy is supplied from electric supply apparatus  20 , charger  103  outputs this DC electric energy without any processing. The DC electric energy outputted from charger  103  is accumulated in storage battery  106  through relays  109  and  110 . 
     When electric supply apparatus  20  supplies AC electric energy, charger  103  converts DC electric discharge energy outputted from storage battery  106 , in AC electric discharge energy, and outputs the converted electric discharge energy to electric supply apparatus  20  through PLC section  102  and lid portion  101 . On the other hand, when electric supply apparatus  20  supplies DC electric energy, DC electric discharge energy outputted from storage battery  106  is outputted to electric supply apparatus  20  through PLC section  102  and lid portion  101  without processing. 
     The shaft of electric motor  105  is connected to the axle of the driving wheel of vehicle  10  to convert the kinetic energy of vehicle  10  in electric energy and generate regenerative braking force. When a rotor included in electric motor  105  is rotated by external force (rotational force of the axle of the driving wheel of vehicle  10 ), electric motor  105  generates electric energy as an electric generator. When kinetic energy due to rotation of the axle is converted in electric energy, electric motor  105  generates regenerative braking force as resistance force to rotations of the axle. Electric motor  105  outputs this electric energy to inverter  104 . This electric energy is AC electric energy. 
     Inverter  104  converts the AC electric energy outputted by electric motor  105 , in DC electric energy, and outputs the resultant electric energy. The converted DC electric energy is accumulated in storage battery  106  through relays  107  to  110 . 
     When relays  107  and  108  are turned on by control section  111 , inverter  104  is electrically connected to relays  109  and  110 , respectively. On the other hand, when relays  107  and  108  are turned off by control section  111 , inverter  104  is electrically disconnected from relays  109  and  110 , respectively. 
     When relays  109  and  110  are turned on by control section  111 , the relays electrically connect charger  103  to storage battery  106 , and electrically connect relays  107  and  108  to storage battery  106 . On the other hand, when relays  109  and  110  are turned off by control section  111 , the relays electrically disconnect charger  103  from storage battery  106 , and electrically disconnect relays  107  and  108  from storage battery  106 . 
     Relays  107  and  109  are provided on the positive electrode side of storage battery  106 . Relays  108  and  110  are provided on the negative electrode side of storage battery  106 . 
     Storage battery  106  accumulates DC electric energy outputted by charger  103  and DC electric energy outputted by inverter  104 . Storage battery  106  can also discharge the accumulated electric energy. Storage battery  106  can be provided by using a secondary battery having a high energy density (for example, a nickel hydrogen battery or a lithium ion battery) or a capacitor having a large capacitance. 
     Storage section  112  stores vehicle unique information. 
     Control section  111  acquires the vehicle unique information stored in storage section  112 , and transmits the acquired vehicle unique information from PLC section  102  to electric supply apparatus  20 . 
     Control section  111  monitors the state of charge (SOC) of storage battery  106 . 
     Control section  111  controls turning on/off of relays  107  to  110 . When vehicle  10  can run, control section  111  turns on all relays  107  to  110 . When vehicle  10  cannot run and no charge/discharge start signal is inputted from PLC section  102 , control section  111  turns off all relays  107  to  110 . When vehicle  10  cannot run and a charge/discharge start signal is inputted from PLC section  102 , control section  111  turns off relays  107  and  108  and turns on relays  109  and  110 . 
     Next, a processing flow of a charge/discharge process according to the present embodiment will be described with reference to  FIG. 2 . 
     At the start of the charge/discharge process illustrated in  FIG. 2 , electric supply plug  201  is inserted at the electrode included in lid portion  101 . In this state, the electrode of electric supply plug  201  is in contact with the electrode of lid portion  101 . That is, in this state, PLC section  202  of electric supply apparatus  20  can communicate with PLC section  102  of vehicle  10 . Additionally, in this state, vehicle  10  cannot run, and all relays  107  to  110  are turned off by control section  111 . 
     First, in S 401  of  FIG. 2 , control section  206  of electric supply apparatus  20  requests vehicle unique information from vehicle  10 . Control section  206  generates a vehicle unique information request, and PLC section  202  transmits the vehicle unique information request to vehicle  10 . 
     PLC section  102  of vehicle  10  waits for reception of the vehicle unique information request in S 301  (S 301 : NO). If receiving the vehicle unique information request (S 301 : YES), PLC section  102  outputs the received vehicle unique information request to control section  111 . Control section  111  reads vehicle unique information from storage section  112  in response to the vehicle unique information request (S 302 ), and PLC section  102  transmits the vehicle unique information to electric supply apparatus  20  (S 303 ). 
     In S 402 , PLC section  202  of electric supply apparatus  20  waits for reception of the vehicle unique information (S 402 : NO). If receiving the vehicle unique information (S 402 : YES), PLC section  202  outputs the received vehicle unique information to control section  206 . The vehicle unique information is inputted to server communication section  203  through control section  206 . Server communication section  203  communicates with server  30  and transmits the vehicle unique information to server  30 . Server  30  checks the vehicle unique information received from server communication section  203  against each piece of the stolen-vehicle information in the stolen-vehicle database, and transmits the checking result to server communication section  203 . The checking result is inputted to control section  206  through server communication section  203 . 
     In S 403 , control section  206  of electric supply apparatus  20  judges the checking result inputted from server communication section  203 . 
     When the vehicle unique information does not coincide with any piece of the stolen-vehicle information, i.e., when vehicle  10  connected to electric supply apparatus  20  is not a stolen vehicle (S 403 : NO), control section  206  connects selector switch  205  to electric power output section  204  to connect electric power output section  204  and electric supply plug  201  through PLC section  202 , and outputs electric energy from electric power output section  204  (S 404 ). On the other hand, when the vehicle unique information coincides with any one piece of the stolen-vehicle information, i.e., when vehicle  10  connected to electric supply apparatus  20  is a stolen vehicle (S 403 : YES), control section  206  connects selector switch  205  to power consumption section  207  to connect electric supply plug  201  and power consumption section  207  through PLC section  202 , and does not output electric energy from electric power output section  204  (S 405 ). 
     Control section  206  generates a charge/discharge start signal after a process of S 404  or S 405 , and PLC section  202  transmits the charge/discharge start signal to vehicle  10  (S 406 ). 
     In S 304 , PLC section  102  of vehicle  10  waits for reception of the charge/discharge start signal (S 304 : NO). If receiving charge/discharge start signal (S 304 : YES), PLC section  102  outputs the received charge/discharge start signal to control section  111 . Control section  111  turns on relays  109  and  110  in response to the charge/discharge start signal (S 305 ). 
     Through the above process, when vehicle  10  connected to electric supply apparatus  20  is not a stolen vehicle (S 403 : NO), electric energy is supplied from electric power output section  204  of electric supply apparatus  20  to vehicle  10  and is accumulated in storage battery  106  of vehicle  10  to charge storage battery  106  (S 407 ). On the other hand, when vehicle  10  connected to electric supply apparatus  20  is a stolen vehicle (S 403 : YES), electric energy is discharged from storage battery  106  of vehicle  10 . The electric discharge energy outputted from storage battery  106  is then received and consumed by power consumption section  207  of electric supply apparatus  20  (S 408 ). 
     In S 306 , control section  111  of vehicle  10  monitors the state of charge of storage battery  106  and waits for completion of charge or discharge (S 306 : NO). When the state of charge reaches an upper limit threshold by charging storage battery  106 , or when the state of charge reaches a lower limit threshold by discharging storage battery  106 , control section  111  judges that charge or discharge is completed (S 306 : YES), generates a charge/discharge completion signal, and turns off relays  109  and  110 . PLC section  102  transmits the charge/discharge completion signal to electric supply apparatus  20  (S 307 ). 
     Here, the lower limit threshold of the state of charge is set to the state of charge in which vehicle  10  cannot run, or the state of charge in which vehicle  10  can run for only a slight distance. Therefore, storage battery  106  is discharged to thereby disable vehicle  10  from running or enable running for only a slight distance. 
     In addition, the upper limit threshold of the state of charge may be set as a value smaller than 100% so as to prevent deterioration of storage battery  106  due to full charge. Moreover, the lower limit threshold of the state of charge may be set as a larger value than 0% so as to prevent storage battery  106  from becoming no longer reusable due to deterioration when storage battery  106  is fully discharged. 
     In S 409 , PLC section  202  of electric supply apparatus  20  waits for reception of the charge/discharge completion signal. While the charge/discharge completion signal is not received by PLC section  202  and is not inputted to control section  206  from PLC section  202  (S 409 : NO), a process of S 407  or S 408  is continued. On the other hand, when the charge/discharge completion signal is received by PLC section  202  and is inputted to control section  206  from PLC section  202 , (S 409 : YES), control section  206  completes a process of S 407  or S 408 . In other words, when receiving the charge/discharge completion signal during the process of S 407 , control section  206  stops the output of electric energy from electric power output section  204  and causes selector switch  205  to be connected to neither electric power output section  204  nor power consumption section  207 . Moreover, when receiving the charge/discharge completion signal during the process of S 408 , control section  206  causes selector switch  205  to be connected to neither electric power output section  204  nor power consumption section  207 . 
     Thus, according to the present embodiment, when vehicle  10  is a stolen vehicle, storage battery  106  of vehicle  10  is discharged to decrease the state of charge of storage battery  106  to such a level that vehicle  10  cannot run or the state of charge to which a vehicle  10  can run for only a slight distance. As a result, the stolen vehicle cannot run from electric supply apparatus  20  or can run for only a slight distance from electric supply apparatus  20 . Therefore, according to the present embodiment, it is made easier to find the stolen vehicle. Moreover, the presence of electric supply apparatus  20  according to the present embodiment itself in public can enhance the effect of reducing theft. 
     In S 408 , control section  206  may further measure the amount of electric discharge energy consumed by power consumption section  207  and may output the measurement result to server communication section  203 . In this case, server communication section  203  transmits the measurement result together with the vehicle unique information to server  30 , and stores the measurement result and the vehicle unique information in association with each other in server  30 . Thereby, when vehicle  10  that is a stolen vehicle is returned to the registered owner and then the owner charges vehicle  10  using electric supply apparatus  20 , electric supply apparatus  20  can return, to the owner, the amount of electric discharge energy stored in server  30 , i.e., the electric energy extracted from vehicle  10  during the theft. 
     (Embodiment 2) 
     As illustrated in  FIG. 3 , the present embodiment is different from Embodiment 1 ( FIG. 1 ) in that the receiver of electric discharge energy is electricity storage section  208  instead of power consumption section  207 . In  FIG. 3 , the same elements as those in  FIG. 1  (Embodiment 1) are designated with the same reference numerals, and their redundant descriptions will be omitted. Hereinafter, only differences from Embodiment 1 will be described. 
     Electricity storage section  208  receives and accumulates electric discharge energy. Electricity storage section  208  is a storage battery or a capacitor, for example. As described above, the present embodiment includes electricity storage section  208  serving as a receiver of electric discharge energy. 
     Control section  206  controls selector switch  205  and electric power output section  204  according to the checking result inputted from server communication section  203 . 
     That is, when the vehicle unique information does not coincide with any piece of the stolen-vehicle information, control section  206  connects selector switch  205  to electric power output section  204  to connect electric power output section  204  and electric supply plug  201  through PLC section  202 , and outputs electric energy from electric power output section  204 . Thereby, control section  206  supplies electric energy to vehicle  10  from electric power output section  204  through selector switch  205 , PLC section  202 , and electric supply plug  201 . On the other hand, when the vehicle unique information coincides with any one piece of the stolen-vehicle information, control section  206  connects selector switch  205  to electricity storage section  208  to connect electric supply plug  201  and electricity storage section  208  through PLC section  202 , and does not output electric energy from electric power output section  204 . Thereby, control section  206  causes electricity storage section  208  to receive and accumulate electric discharge energy. 
     Next, a processing flow of a charge/discharge process according to the present embodiment will be described with reference to  FIG. 4 . As illustrated in  FIG. 4 , the present embodiment is different from Embodiment 1 ( FIG. 2 ) in that a process of S 410  is included instead of S 408 . In  FIG. 4 , the same steps as those in  FIG. 2  (Embodiment 1) are designated with the same reference numerals, and their redundant descriptions will be omitted. Hereinafter, only differences from Embodiment 1 will be described. 
     When vehicle  10  connected to electric supply apparatus  20  is not a stolen vehicle (S 403 : NO), electric energy is supplied from electric power output section  204  of electric supply apparatus  20  to vehicle  10  and is accumulated in storage battery  106  of vehicle  10  to charge storage battery  106  (S 407 ). On the other hand, when vehicle  10  connected to electric supply apparatus  20  is a stolen vehicle (S 403 : YES), electric energy is discharged from storage battery  106  of vehicle  10 . The electric discharge energy outputted from storage battery  106  is then received and accumulated by electricity storage section  208  of electric supply apparatus  20  (S 410 ). 
     As described above, the present embodiment includes electricity storage section  208  accumulating electric discharge energy and can therefore reuse the accumulated electric discharge energy. 
     In S 410 , control section  206  may further measure the amount of electric discharge energy accumulated from vehicle  10  in electricity storage section  208  and may output the measurement result to server communication section  203 . In this case, server communication section  203  transmits the measurement result together with the vehicle unique information to server  30 , associates the measurement result with the vehicle unique information, and stores the associated result in server  30 . Thereby, when vehicle  10  that is a stolen vehicle is returned to the registered owner and then the owner charges vehicle  10  using electric supply apparatus  20 , electric supply apparatus  20  can return, to the owner, the amount of electric discharge energy stored in server  30 , i.e., the electric energy extracted from vehicle  10  during the theft. 
     (Embodiment 3) 
     As illustrated in  FIG. 5 , the present embodiment is a combination of Embodiment 1 and Embodiment 2. In  FIG. 5 , the same elements as those in  FIG. 1  (Embodiment 1) or  FIG. 3  (Embodiment 2) are designated with the same reference numerals, and their redundant descriptions will be omitted. Hereinafter, only differences from Embodiment 1 and Embodiment 2 will be described. 
     When the vehicle unique information coincides with any one piece of the stolen-vehicle information, control section  206  connects selector switch  205  to selector switch  209  to connect electric supply plug  201  and selector switch  209  through PLC section  202 , and does not output electric energy from electric power output section  204 . 
     Moreover, control section  206  monitors the state of charge of electricity storage section  208  and connects selector switch  209  to one of power consumption section  207  and electricity storage section  208  according to the state of charge. 
     Next, a process flow of a charge/discharge process according to the present embodiment will be described with reference to  FIG. 6 . As illustrated in  FIG. 6 , the present embodiment is different from Embodiment 1 ( FIG. 2 ) and Embodiment 2 ( FIG. 4 ) in that a process of S 602  is newly included and a process of S 601  is included instead of S 405 . In  FIG. 6 , the same steps as those in  FIG. 2  (Embodiment 1) or  FIG. 4  (Embodiment 2) are designated with the same reference numerals, and their redundant descriptions will be omitted. Hereinafter, only differences from Embodiment 1 and Embodiment 2 will be described. 
     When selector switch  205  is connected to selector switch  209  (S 601 ), control section  206  judges whether electricity storage section  208  can be charged (S 602 ). 
     When the state of charge of electricity storage section  208  is smaller than a threshold, control section  206  judges that electricity storage section  208  can be charged (S 602 : YES), and connects selector switch  209  to electricity storage section  208 . Thereby, control section  206  causes electricity storage section  208  to receive and accumulate electric discharge energy (S 410 ). 
     On the other hand, when the state of charge of electricity storage section  208  is equal to or more than the threshold, control section  206  judges that electricity storage section  208  cannot be charged (S 602 : NO), and connects selector switch  209  to power consumption section  207 . Thereby, control section  206  causes power consumption section  207  to receive and consume electric discharge energy (S 408 ). 
     Here, the threshold of the state of charge of electricity storage section  208  is set to the state of charge equivalent to the full charge of electricity storage section  208 . 
     That is, when the state of charge of electricity storage section  208  is smaller than the threshold, control section  206  causes electricity storage section  208  to receive and accumulate electric discharge energy. Additionally, when the state of charge of electricity storage section  208  is equal to or more than the threshold, control section  206  causes power consumption section  207  to receive and consume electric discharge energy. 
     As described above, in the present embodiment, the receiver of electric discharge energy is determined to be either power consumption section  207  or electricity storage section  208  according to the state of charge of electricity storage section  208 . Thereby, electric discharge energy accumulated in electricity storage section  208  is reusable. Additionally, even when electric discharge energy cannot be charged in electricity storage section  208 , electric discharge from storage battery  106  included in vehicle  10  can be continued since power consumption section  207  is provided. Accordingly, the reusability of electric discharge energy can be enhanced, and a stolen vehicle can be easily found. 
     (Embodiment 4) 
     As illustrated in  FIG. 7 , the present embodiment is different from Embodiment 1 ( FIG. 1 ) in that electric supply apparatus  20  further includes display section  210  and vehicle  10  further includes display section  113 . In  FIG. 7 , the same elements as those in  FIG. 1  (Embodiment 1) are designated with the same reference numerals, and their redundant descriptions will be omitted. Hereinafter, only differences from Embodiment 1 will be described. 
     During discharge of storage battery  106  of vehicle  10 , the state of charge of storage battery  106  gradually decreases with the passage of time, for example, as illustrated in  FIG. 8 . Here, even though the person who stole the vehicle intends to charge vehicle  10  with electric supply apparatus  20 , if the person notices that electric energy is extracted from vehicle  10  by electric supply apparatus  20 , the person may drive vehicle  10  and run away before the completion of electric discharge. 
     Thus, in the present embodiment, when the vehicle unique information coincides with any one piece of the stolen-vehicle information, control section  206  of electric supply apparatus  20  displays on display section  210  a pseudo image as illustrated in  FIG. 9  indicating that electric energy is accumulated in storage battery  106  of vehicle  10 , although the state of charge of storage battery  106  is decreasing. This pseudo image pretends as if electric energy is gradually accumulated in storage battery  106  of vehicle  10  with the passage of time and the state of charge of storage battery  106  increases gradually with the passage of time. Furthermore, control section  206  may display on display section  113  of vehicle  10  the pseudo image illustrated in  FIG. 9  through PLC section  202 , electric supply plug  201 , lid portion  101 , PLC section  102 , and control section  111 . 
     In addition, electric supply apparatus  20  and vehicle  10  may include a voice output section outputting pseudo voice instead of the above-described display section displaying a pseudo image. That is, when the vehicle unique information coincides with any one piece of the stolen-vehicle information, control section  206  may output from the voice output section the pseudo voice indicating that electric energy is accumulated in storage battery  106 , although the state of charge of storage battery  106  is decreasing. This pseudo voice indicates that the state of charge of storage battery  106  gradually increases with the passage of time. 
     That is, in the present embodiment, when the vehicle unique information coincides with any one piece of the stolen-vehicle information, control section  206  generates the pseudo image or the pseudo voice for a pseudo indication that electric energy is accumulated in storage battery  106 , although the state of charge of storage battery  106  is decreasing. 
     In this way, the pseudo indication as illustrated in  FIG. 9  is made in spite of extracting electric energy from vehicle  10 . This can cause the person who stole the vehicle to believe that vehicle  10  is being charged. Therefore, the present embodiment can prevent the person who stole the vehicle from running away from electric supply apparatus  20  using vehicle  10  halfway through electric discharge. 
     Moreover, providing the person who stole the vehicle with the pseudo indication as illustrated in  FIG. 9  and thus causing the person to believe that vehicle  10  is being charged makes the person stay near electric supply apparatus  20  for a longer time. Accordingly, the present embodiment can increase the probability of arresting the suspect. 
     In addition, when making the above-described pseudo indication, control section  206  may report that electric energy accumulated in storage battery  106  is discharged from storage battery  106 , to server  30  through server communication section  203 . In this way, by reporting, to server  30 , that electric energy is discharged from storage battery  106 , the person who stole the vehicle believe that vehicle  10  is being charged. During this period, information on the stolen vehicle can be reported to an appropriate organization (for example, the police). 
     In addition, the present embodiment can be combined with Embodiment 2 or Embodiment 3. 
     In the above, the embodiments of the present invention have been described. 
     In order to enhance safety in the above-described embodiments, relays  107  to  110  are provided on both the positive electrode side and the negative electrode side of storage battery  106 . However, the relays may be provided on only one of the positive electrode side and the negative electrode side of storage battery  106 . This is because charge or discharge of storage battery  106  can be stopped by electrically disconnecting only one of the positive electrode side and the negative electrode side of storage battery  106 . 
     Moreover, electric energy may be transferred between electric supply apparatus  20  and vehicle  10  by non-contacting charge through electromagnetic induction. That is, electric supply apparatus  20  may supply electric energy to vehicle  10  through electromagnetic induction non-contactingly with vehicle  10 . In this case, electric supply plug  201  and lid portion  101  are unnecessary while PLC section  202  and PLC section  102  can be replaced with communication sections capable of wireless short distance communication. 
     The embodiments of the present invention described above are provided as hardware. The present invention can be achieved through software in cooperation with hardware, however. 
     The functional blocks described in the embodiments are achieved by an LSI, which is typically an integrated circuit. The functional blocks may be provided as individual chips, or part or all of the functional blocks may be provided as a single chip. Depending on the level of integration, the LSI may be referred to as an IC, a system LSI, a super LSI, or an ultra LSI. 
     In addition, the circuit integration is not limited to LSI and may be achieved by dedicated circuitry or a general-purpose processor other than an LSI. After fabrication of LSI, a field programmable gate array (FPGA), which is programmable, or a reconfigurable processor which allows reconfiguration of connections and settings of circuit cells in LSI may be used. 
     Should a circuit integration technology replacing LSI appear as a result of advancements in semiconductor technology or other technologies derived from the technology, the functional blocks could be integrated using such a technology. Another possibility is the application of biotechnology and/or the like. 
     The disclosure of Japanese Patent Application No. 2011-078238, filed on Mar. 31, 2011, including the specification, drawings and abstract, is incorporated herein by reference in its entirety. 
     INDUSTRIAL APPLICABILITY 
     The present invention is suitable for, for example, an electric supply apparatus supplying electric energy to a vehicle driven by electric energy accumulated in a storage battery. 
     REFERENCE SIGNS LIST 
     
         
           10  Vehicle 
           20  Electric supply apparatus 
           30  Server 
           201  Electric supply plug 
           202  PLC section 
           203  Server communication section 
           204  Electric power output section 
           205 ,  209  Selector switch 
           206  Control section 
           207  Power consumption section 
           208  Electricity storage section 
           210  Display section