JP2019113957A - Charging system and charging method - Google Patents

Abstract

To provide a charging system and a charging method that actualize, at low cost, a mechanism enabling a user who is not an administrator of a generally installed outlet to utilize the outlet to charge an electric motor-driven device such as an electric automobile.SOLUTION: A charging system has an electric power company system 7, a collective housing outlet 51, and an outlet type charging facility 4 capable of supplying an electric automobile 2 with electric power supplied through the collective housing outlet 51 by inserting a plug 49 into the collective housing outlet 51 and inserting a charging plug 22 into an outlet 41. The outlet type charging facility 4 has a charging time recording part 471 which records use detail information including a start time and an end time of charging, and records the use detail information in a block on a block chain, transfers the possession to an electric power company while giving electronic signatures with a user and a secret keys of the outlet type charging facility 4, and records it in the electric power company system 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technology for charging an electric device, and more particularly to a technology effectively applied to an electric car charging system and an electric car charging method for charging a resident electric car in a housing complex.

  As air pollution and global warming become more serious, the next generation of EVs (Electric Vehicles) and PHVs (Plug-in Hybrid Vehicles) (hereinafter sometimes referred to collectively as “electric vehicles”) The move to conversion to automobiles is accelerating worldwide. However, in Japan, the ratio of electric vehicles to the number of registered passenger cars does not reach 1%, and the development of charging infrastructure is important for the spread of electric vehicles.

  More than 90% of the users of electric vehicles are residents of single-family homes, and less than 10% are residents of multi-family houses such as apartments. However, over 40% of the total housing is occupied by multi-family dwellings, and the number of homes is also on the rise. Considering that the number of users of electric vehicles will increase in the future, maintenance and diffusion of charging equipment to collective housing is required. In this case, in order to solve the problems such as the reduction of the installation cost and the operation cost, and the securing of the installation space, it is desirable to set an environment where charging can be performed using a generally installed outlet.

  As a technique related to this, for example, Japanese Unexamined Patent Publication No. 2008-263712 (Patent Document 1) incorporates a communication function by a control function and PLC (Power Line Communication: power line communication) into an outlet installed in a town. It is described that a unique outlet ID is given to make a high-function outlet, and information such as the installation place and the type of outlet is managed by the server while being published on the Web server, and can be reserved.

  Further, for example, in Japanese Patent Application Laid-Open No. 2011-164756 (Patent Document 2), identification information for authentication is recorded in a portable portable interface (IF) which has a plug and an outlet and can be energized, and the user can When receiving the feeding service, plug the plug of the electric car etc. into the outlet of the portable IF and insert the plug of the portable IF into the feeding outlet. Then, the portable IF transmits the identification information to the feeding facility, and the identification information is properly registered. It is described that if it is done, power feeding is started.

JP 2008-263712 A JP, 2011-164756, A

  According to the prior art described in Patent Documents 1 and 2, etc., it is possible to realize an environment in which the user can charge the electric vehicle using a generally installed outlet. It is structurally possible that the administrator (management union) of the organization can provide a service to charge electric vehicles through an outlet installed in a common area such as a parking lot as a service mainly for residents. Become.

  However, in the prior art, for example, it is necessary to add the function of a so-called smart meter such as measurement of the amount of electric power basically to a generally installed outlet. In addition, in order to prevent power theft and fraudulent claims etc. (that is, to ensure the "authenticity of the electricity usage statement"), a function relating to strict user authentication is also implemented in each outlet (or in Patent Document 2). It is necessary to mount equipment held by the user such as a mobile IF, and the effect on reduction of development and installation costs and operation costs is reduced.

  In particular, the installer / administrator of the outlet for charging (that is, an entity that concludes a contract with the power supplier such as a power company for the use of power at the outlet and pays a fee), If the user who uses the electric vehicle for charging is different, the electric power supplier and the outlet manager (for example, a management association for collective housing), and the user who uses the outlet for charging (for example, the collective housing) It is necessary to secure the "authenticity of the statement of electricity use" among the three parties of the resident, the visitor, etc.), and it is necessary to realize a mechanism which makes this possible at low cost.

  Therefore, an object of the present invention is to provide a charging system capable of charging at a low cost a mechanism that allows a user who is not a manager of the outlet to charge an electric device such as an electric vehicle by using a generally installed outlet. It is to provide a charging method.

  The above and other objects and novel features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

  The outline of typical ones of the inventions disclosed in the present application will be briefly described as follows.

  A charging system according to a representative embodiment of the present invention is a charging system that enables a user to charge an electric device, and includes an information processing system of a power supplier and a charging base outlet installed at each charging base. By connecting the charging base outlet and the charging cable connected to the electric device, power supplied from the power supplier via the charging base outlet can be supplied to the electric device. And charging equipment.

  The charging facility further includes a charging time recording unit that records usage detail information including start time and end time of charging of the electric device, and records the usage detail information in a block on a block chain. The electronic signature is respectively signed by the user and the secret key of the charging facility, and the possession is transferred to the power supplier and recorded in the information processing system.

  The effects obtained by typical ones of the inventions disclosed in the present application will be briefly described as follows.

  That is, according to a representative embodiment of the present invention, there is provided a mechanism by which a user who is not a manager of the outlet can charge an electric device such as an electric vehicle by using a generally installed outlet. It can be realized at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed the outline | summary about the structural example of the charge system of one embodiment of this invention. It is the figure which showed the outline | summary about the example of a screen displayed on the user terminal at the time of utilization of the charge service in one embodiment of this invention, and an outlet type charge installation. It is the figure which showed the outline | summary about the example of the management screen of the utilization statement displayed on the user terminal in one embodiment of this invention. It is the figure which showed the example about the example of agreement formation with respect to the usage-specification data using MultiSig of the block chain in one embodiment of this invention. It is the flow figure which showed the outline about the example of the flow of the processing at the time of charge in one embodiment of the present invention. It is the flow figure which showed the outline about the example of the flow of the processing at the time of charge of the fee for use in one embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that, in all the drawings for describing the embodiments, the same reference numeral is attached to the same part in principle, and the repetitive description thereof will be omitted. On the other hand, the parts described with reference to the reference numerals in a certain drawing may be referred to by the same reference numeral although not shown again in the description of the other drawings.

<Overview>
A charging system according to an embodiment of the present invention enables charging of an electric vehicle by charging on a charge basis, using an outlet installed in a common part such as a parking lot in a collective housing such as an apartment as a charging base. It is a system. Although the present embodiment will be described by way of an example of an apartment complex, it is widely used in an environment where a user different from the installer / manager of the outlet for charging can charge the electric vehicle using the outlet. It can apply. Moreover, the charging object is not limited to the electric car, and can be applied to various electric devices such as an electric tool. Furthermore, the case of directly charging a rechargeable battery, a storage battery or the like mounted on these devices is also included.

  In this embodiment, stealing of electric power by a user, a manager / management union of collective housing (hereinafter may be collectively referred to as “manager” in some cases), and other persons, illegal billing, etc. (ie charging was performed In order to prevent “falsification” and “forgery etc.” against the facts to ensure “authenticity of electricity usage details”, block chain technology, which is being widely used in recent years, is used. That is, by recording the fact of charging on the block, the characteristics of the block chain prevent tampering with the fact of charging. This makes it possible to implement a secure charging environment with less development load.

  Further, in the present embodiment, it is assumed that a pay-per-use charge according to the usage time of the charging service is performed on the user who has performed charging. In other words, the administrator of a multi-dwelling house (a person who pays the electricity bill directly to the power company) who installs the charging outlet charges the user according to the amount of power (Kwh) charged using the outlet. Instead of charging on a pay-as-you-go basis (reselling the power), a charge corresponding to the usage time is collected from the user as compensation for the use of the charge service (similar to the charge service for mobile phones in convenience stores and the like). As a result, it is not necessary for the manager of the collective housing to provide the electricity outlet and the equipment such as the smart meter specified by the law to the outlet for charging, and the installation and operation cost of the charging outlet can be greatly reduced. Make it possible.

<System configuration>
FIG. 1 is a diagram showing an outline of a configuration example of a charging system according to an embodiment of the present invention. The charging system 1 of the present embodiment has, for example, a configuration including a user terminal 3, an outlet type charging facility 4, a collective housing outlet 51, and an electric power company system 7. In the present embodiment, a plug 49 can be inserted into the collective housing outlet 51 instead of directly implementing the authentication function and various functions with respect to the existing collective housing outlet 51 installed in the collective housing 5. Various functions are implemented to the outlet type charging equipment 4 which is an external device having the As a result, it is possible to eliminate as much as possible modification of the existing collective housing outlet 51 and the like, and to greatly reduce the installation cost of the charging facility.

  In the present embodiment, the collective housing 5 is provided with an HD-PLC concentrator 52, which is a repeater for connecting an external network such as the Internet 6 and the like by HD-PLC (High Definition Power Line Communication). Be done. Although HD-PLC is used in the present embodiment, PLC may be used. The HD-PLC concentrator 52 includes a PLC communication unit 521 having a communication function by HD-PLC, to which one or more existing collective housing outlets 51 are connected.

  By enabling communication by PLC, for example, the charging service according to the present embodiment is provided even in an offline environment where user terminals 3 described later can not be connected to a network such as the Internet 6 by wireless communication, such as underground parking lots. It is possible to In other words, in the online environment where the user terminal 3 can connect to a network such as the Internet 6 by wireless communication, providing the charging service according to the present embodiment using the multi-unit outlet 51 without the communication function by PLC is also possible. It is possible.

  As described above, the outlet type charging facility 4 is an external device having a plug 49 which can be inserted into the collective housing outlet 51. Basically, the plug 49 is always inserted into the collective housing outlet 51. It is installed in the state. In the example of FIG. 1, since the plug 49 is directly provided to the housing of the outlet-type charging facility 4, the housing of the outlet-type charging facility 4 is an assembly when the plug 49 is inserted into the collective housing outlet 51. It will be in the state fixed with respect to the house outlet 51 (and the wall surface and floor etc. in which this was installed). On the other hand, when the outlet type charging facility 4 can not be fixed directly due to the restriction of the installation location of the collective housing outlet 51, the outlet type charging facility 4 is installed at another location, and the outlet type charging facility The plug 49 connected in a state separated from 4 may be inserted into the collective housing outlet 51.

  The outlet type charging facility 4 further includes an outlet 41 to which the charging plug 22 of the charging cable 21 connected to the electric vehicle 2 to be charged can be inserted. For example, the user inserts the plug 49 of the outlet-type charging facility 4 into the collective housing outlet 51, and inserts the charging plug 22 into the outlet 41 of the outlet-type charging equipment 4, whereby the collective housing outlet 51 is obtained. The electric power supplied from can be charged to the target electric vehicle 2 via the outlet type charging facility 4. In addition, outlet type charging facility 4 of the present embodiment is a normal charging facility (not rapid charging) using single phase AC 200 V or 100 V in order to reduce installation cost using a general collective housing outlet 51.

  Further, in the present embodiment, the outlet type charging facility 4 includes only the outlet 41, and the charging cable 21 is prepared by the user (by using an on-vehicle one). Although the installation cost can be greatly reduced, the configuration in which the outlet-type charging facility 4 is provided up to the charging cable 21 is not excluded. Alternatively, the charging cable 21 may be connected to the outlet 41 by connecting the charging cable 21 to an attachment such as an extension cable and connecting the extension cable to the outlet 41.

  The plug-type charging facility 4 includes, for example, a plug lock control unit 42 implemented by software such as a microcomputer or semiconductor circuit, hardware such as other devices, or software operating on a CPU (Central Processing Unit), an energization control unit 43, It has each part, such as PLC communication part 44, NFC communication part 45, screen display part 46, and outlet application 47 grade.

  The plug lock control unit 42 has a function of controlling a lock mechanism (not shown) that locks / unlocks the charging plug 22 inserted into the outlet 41 so as not to be removed during energization. The energization control unit 43 has a function of controlling ON / OFF of energization between the plug 49 (collective house outlet 51) and the outlet 41 (charging plug 22) and controlling the amount of power flowing at the time of energization ON. The PLC communication unit 44 has a PLC communication function on the outlet type charging facility 4 side.

  The NFC communication unit 45 wirelessly communicates with the user terminal 3 owned by the user by NFC (Near Field Communication) based on control from the outlet application 47 described later, and the user's key information (public key / secret) Key) is obtained. It may have a function of transmitting, to the user terminal 3, history information of the charging time (charging start time / completion time) acquired by the charging time recording unit 471 of the outlet application 47 described later. The wireless communication system is not particularly limited, and may be configured to appropriately use Bluetooth (registered trademark) or other known short-distance wireless communication system.

  The screen display unit 46 includes, for example, a display such as a small touch panel, and displays various information related to charging such as charging status and charging details based on control from the outlet application 47 described later, and an instruction from the user And has a function to accept an operation. As a configuration not having a display, the user terminal 3 may be configured to realize the same function via wireless communication with the user terminal 3 by the NFC communication unit 45.

  The outlet application 47 is an application program having a function of controlling the operation of the outlet-type charging facility 4 and includes, for example, each unit (function) of the charging time recording unit 471 and the key management unit 472. The charging time recording unit 471 is a storage unit including a recording device such as a memory or a hard disk drive (HDD) based on a control signal from the energization control unit 43, for the charging time (charging start time / completion time) for each user. It has the function of recording and managing 48. It also has a function of transmitting information (usage detail information) related to the charging time of each user recorded in the storage unit 48 to the power company system 7 via the PLC communication unit 44 at a predetermined timing. The key management unit 472 has a function of generating a public key and a secret key of the outlet type charging facility 4 and recording and managing the public key and the secret key in the storage unit 48 or the like.

  The key management unit 472 uses the secret key of the outlet-type charging facility 4 and the secret key of the user (user terminal 3) acquired by the NFC communication unit 45 with respect to the usage statement information generated by the charging time recording unit 471. It has a function as a client of a block chain which performs electronic signature to make a block of a block chain. In addition, it may have a function of transmitting the public key of the outlet-type charging facility 4 and the public key of the user acquired by the NFC communication unit 45 to the power company system 7 via the PLC communication unit 44. The public key of the user may be transmitted from the user terminal 3 directly to the power company system 7 via the Internet 6.

  The user terminal 3 is, for example, a portable information processing terminal such as a smartphone or a tablet terminal, and uses a charging application 30 for utilizing a charging service by the outlet type charging facility 4 as an application program operating on a CPU (not shown). Have. The charge application 30 includes, for example, respective units (functions) such as an account information management unit 31, an NFC communication unit 32, a charge history management unit 33, a balance management unit 34, and a key management unit 35.

  The account information management unit 31 has, for example, a function of managing account information of a user who holds the user terminal 3. The account information includes, for example, a login password of the charging application 30, and various attribute information such as the user's name, address, and address information. Information that enables estimation of the power required for charging may be included, such as the model of the electric vehicle 2 held by the user and the characteristic information of the battery.

  The NFC communication unit 32 wirelessly communicates with the NFC communication unit 45 of the outlet-type charging facility 4 by NFC, and has a function of transmitting user key information managed by a key management unit 35 described later. It may have a function of receiving history information of charging time (charging start time / completion time) from the outlet application 47 of the outlet type charging facility 4. The received history information is managed by the charge history management unit 33. The charging history management unit 33 may further manage, for example, information on the payment history of charges relating to the use of the charging service of the user.

  For example, as described later, when the user pays the charge for using the charging service with a good having an exchangeable value such as points or coins, the balance management unit 34 manages information concerning the holding balance of the good. It has a function. Instead of the above-described charge history management unit 33, the balance management unit 34 may manage information of payment points for the charge for use of the user's charge service and payment history information based on coins.

  The key management unit 35 has a function of generating and managing the public key / private key of the user. As described above, the information of the generated secret key is transmitted to the outlet-type charging facility 4 via the NFC communication unit 32, and is used for the electronic signature for the block in which the usage detail information is recorded in the block chain. The generated public key information is transmitted to the power company system 7 via the outlet type charging facility 4 or directly via the Internet 6 and used for verification of the electronic signature of the block in the block chain.

  The power company system 7 is an information processing system operated by a power company that is a power supply source. Although the power company system 7 actually has a number of subsystems and functions, in the example of FIG. 1, only the elements related to usage details and charges related to the present embodiment will be described, and the descriptions of other elements will be described. It is omitted. Moreover, although the electric power company system 7 is described as one system in the example of FIG. 1, it may be comprised in the form which divided | segmented the function into several subsystem, for example.

  The power company system 7 includes, for example, a server device, a virtual server built on a cloud computing service, and the like. Then, by using a CPU (not shown), an operating system (OS) or DBMS (DataBase Management System) developed on a memory from a storage device such as an HDD, middleware such as a Web server program, or software running thereon is executed. To realize various functions related to usage details of electricity and billing. The power company system 7 includes, for example, units such as a block chain processing unit 71 implemented as software, a usage statement management unit 73, and a clearing system cooperation unit 74.

  The block chain processing unit 71 is a core module that performs processing relating to the block chain in which the usage specification information in the present embodiment is recorded. Various methods are known as a method of implementing the block chain technology, and there are a plurality of platforms. However, in this embodiment, a “public type” (in which processing fees are generated for each transaction and processing speed is slow) For example, it is preferable to use a so-called "consortium type" block chain in the "private type", not Bitcoin (registered trademark) or Ethereum etc.). In the "consortium type", since the degree of dispersion of the system is lower than that of others, it is possible to construct with a simple configuration and at low cost, and the operation load can also be reduced.

  In this embodiment, the block chain processing unit 71 will be described as using, for example, Bigchain DB, which is a distributed block chain database of “consortium type”. The block chain processing unit 71 may use another distributed block chain database. That is, the block chain processing unit 71 configures a block chain database by the storage unit 72 including a recording device such as an HDD, and has a function as a verification node that verifies each transaction in the block chain. In this configuration, it is not necessary to separately provide a transaction verification node in each outlet type charging facility 4.

  The usage statement managing unit 73 has a function of outputting the charging time (charging start time / completion time) for each user as a usage statement for charging of a charge for the charging service. The output of the usage statement is executed as, for example, monthly batch processing. The clearing system cooperation unit 74 has a linking function with a clearing management base such as a charge clearing system or a point management system (not shown) of the electric power company. Thus, for example, based on the information on the usage statement output by the usage statement management unit 73, billing processing of electricity charges, money between the user and the administrator of the housing complex 5 by a method as described later Alternatively, it is possible to automatically carry out settlement / clearing processing with goods such as points and coins.

<Screen example and usage image>
FIG. 2 is a diagram showing an outline of a screen example displayed on the user terminal 3 and the outlet-type charging facility 4 at the time of using the charging service in the present embodiment. The upper part shows the screen displayed on the user terminal 3 owned by the user, and the lower part shows the screen displayed on the screen display unit 46 installed on the surface part of the outlet type charging facility 4 (the outlet type charging facility 4 has a display If not, the transition of the screen displayed on the user terminal 3 is shown in time series.

  When the user charging the electric vehicle 2 starts up the charging application 30 of the user terminal 3 of the user, the user terminal 3 displays an instruction screen as shown in the upper part (A). Following this, the user holds or touches the user terminal 3 over (the reading unit of) the NFC communication unit 45 installed on the surface portion of the outlet type charging facility 4 (hereinafter may be simply referred to as “touch”) . At this time, the NFC communication unit 45 of the outlet-type charging facility 4 reads the information of the user's public key from the user terminal 3.

  When the public key is read, the outlet-type charging facility 4 causes the screen display unit 46 to display a screen for charging start as shown in (a) of the lower part of FIG. 2. When the user inserts the charging plug 22 of the charging cable 21 connected to the electric car 2 into the outlet 41 and depresses the "charge start" button of the screen display unit 46 of the outlet type charging facility 4, charging starts.

  During charging, a screen such as (b) in the lower part of FIG. 2 is displayed on the screen display unit 46 of the outlet-type charging facility 4, and the user can grasp the charging status. By pressing the "charging end" button, charging can be terminated halfway. When the charging is completed, the screen display unit 46 displays a screen indicating the usage details as shown in the lower part of FIG. 2 (c). At this time, the user presses the “charge end” button and touches the NFC communication unit 45 of the outlet type charging facility 4 by the user terminal 3 so that the user terminal 3 acquires the information of the usage statement and the content thereof It is displayed as shown on the screen of (B) in the upper part of FIG.

  At this time, the outlet-type charging facility 4 reads the user's secret key from the user terminal 3 via the NFC communication unit 45. When the secret key is read, the outlet-type charging facility 4 causes the screen display unit 46 to display a screen for charging completion as shown in (d) of the lower part of FIG. 2. The user disconnects the charging plug 22 from the outlet 41, and the series of charging processing ends.

  FIG. 3 is a diagram schematically showing an example of a management screen of usage details displayed on the user terminal 3 in the present embodiment. The upper diagram illustrates an example of the charging history management screen displayed when the user performs an operation of confirming the charging history (use specification) in the charging application 30 of the user terminal 3. Here, for example, a list of the monthly total used amount, the number of times of charge (charge), and the charge history (usage date, charge time, used amount) is displayed.

  Here, if the user is pressing the "Payment" button when the usage charge for the displayed month is unpaid, as shown in the lower left figure, a screen for paying the charge for the target month is displayed . In the present embodiment, instead of money as payment means, payment is made using coins, which are goods having exchange value. In addition, the method of the charge which concerns on the charge of the electricity bill in this Embodiment, payment of the charge for charge of a charge service, clearing etc. is mentioned later.

  In the upper diagram of FIG. 3, when the user selects an arbitrary history from the list of charging histories, a screen displaying detailed contents of the history as shown in the lower right diagram is displayed. In the detailed content, in addition to the display items in the list, detailed information such as, for example, the place of use, the charging start time, and the ending time is displayed.

<Securing of “Authentication of Electrical Usage Details” by Block Chain>
FIG. 4 is a diagram showing an outline of an example of agreement formation for usage specification data using MultiSig of the block chain in the present embodiment. In the block chain technology, MultiSig is a technology for improving security by making a block inaccessible by collecting a certain number or more of keys by digitally signing the block with a plurality of secret keys. By using this, by signing the information of the usage statement held in the block with a plurality of secret keys, it is possible to secure "authenticity of the statement of electricity usage" relatively easily.

  First, in a state where there is no block, in the outlet-type charging facility 4, the outlet application 47 creates a block 71 a owned by the outlet-type charging facility 4 using a signature with the secret key of the outlet-type charging facility 4. In this block 71a, information of usage details such as charging start time and end time is taken in, and even if the subsequent possession is transferred by the signature of the outlet type charging facility 4, the information of usage details can not be falsified It becomes.

  After that, in the outlet-type charging facility 4, the block 71a is further signed by the secret key of the outlet-type charging facility 4 to be a block 71b, thereby the block 71b becomes the outlet-type charging facility 4 and the user (user terminal 3). Co-ownership with However, at this stage, since there is no signature using the secret key of the user (user terminal 3), it is provisional co-ownership.

  Here, when the user refers to the information of the usage statement concerning the block 71b through the user terminal 3 and agrees to the contents, in the outlet-type charging facility 4, the outlet-type charging facility 4 and the user with respect to the block 71b It is signed by the secret key of (user terminal 3) to make a block 71c. As a result, the joint ownership of the outlet-type charging facility 4 and the user (user terminal 3) for the block 71c is determined, and the ownership is transferred to the power company. The block 71b related to the joint ownership of the outlet-type charging facility 4 and the user (user terminal 3) can transfer the ownership only by the multiple signatures (MultiSig) of both. Since only the usage details according to the block 71c in the confirmed state are valid, and the others are not treated as valid usage details, the "authenticity of the electrical usage specification" can be secured.

<Flow of processing (when charging)>
FIG. 5 is a flowchart showing an outline of an example of the flow of processing at the time of charging in the present embodiment. First, the user charging the electric vehicle 2 touches the NFC communication unit 45 of the outlet type charging facility 4 in a state where the charging application 30 is activated in the user terminal 3 (S01). As a result, an NFC communication session is established between the NFC communication unit 32 of the charging application 30 of the user terminal 3 and the NFC communication unit 45 of the outlet-type charging facility 4.

  Through the communication session, in the outlet-type charging facility 4, the outlet application 47 reads the public key of the user managed by the key management unit 35 of the charging application 30 of the user terminal 3 (S02). By reading the public key, the outlet application 47 can use the charging service as having been successfully authenticated. That is, the user is not limited to the specific outlet-type charging facility 4 and can freely use the outlet-type charging facility 4 installed in any place.

  The outlet application 47 of the outlet-type charging facility 4 may transmit the read public key to the power company system 7 via the PLC communication unit 44 together with the usage statement created at this timing or later. . The power company system 7 may use the public key of the user transmitted along with the verification of the transmitted usage details, or may be transmitted directly from the user terminal 3 via the Internet 6 or the like in advance. A public key may be used.

  In addition, the public key (and the secret key) transmitted by the user terminal 3 to the outlet-type charging facility 4 may be generated each time the user uses the charging service. At this time, for example, in the key management unit 35 of the charging application 30, the public key (the key) is obtained based on biometrics information obtained by the user using the camera function (not shown) of the user terminal 3 And a secret key may be generated. Furthermore, for example, when the user "self-portraits" his own face, a predetermined portion of the electric vehicle 2 to be charged (for example, a difference between the front design, the rear design, and the charging cable 21) Make a copy of the mouthpiece, license plate, etc. where the vehicle type and attribute information of the electric vehicle 2 can be identified), and include biometrics information including the image of the electric vehicle 2 (image of "face" of the electric vehicle 2) You may get it.

  If the vehicle type and attribute information of the electric vehicle 2 can be specified here, the information may be transmitted to the outlet type charging facility 4. The outlet application 47 of the outlet type charging facility 4 specifies the charging characteristics of the target electric vehicle 2 (for example, the capacity of the battery, the time required to fully charge, etc.) based on the obtained information, and this and the actual charging time The usage fee may be calculated based on the information in the above.

  When the user inserts the charging plug 22 of the charging cable 21 connected to the electric car 2 into the outlet 41 of the outlet-type charging facility 4 after reading the information of the user's public key by the outlet-type charging facility 4 (S03) In the outlet-type charging facility 4, the plug lock control unit 42 locks the charging plug 22 inserted into the outlet 41 (S04), and the energization control unit 43 enables energization (S05).

  Here, when the user gives an instruction to start charging by pressing the "charge start" button displayed on the screen display unit 46 of the outlet type charging facility 4 (S06), the energization control unit 43 of the outlet type charging facility 4 starts energizing. Then, energization is performed until charging of the electric vehicle 2 is completed or an instruction to finish charging is given by the user (S07). At this time, the charging time recording unit 471 of the outlet application 47 records the start time and the end time of the energization. In addition, in order to secure the accuracy of these times, for example, the outlet application 47 is connected to an NTP (Network Time Protocol) server (not shown) via the Internet 6 via the PLC communication unit 44 at a predetermined timing such as daily. The time may be corrected by accessing.

  When the charging is completed and the energization is completed, in the outlet-type charging facility 4, the charging time recording unit 471 of the outlet application 47 creates information of a usage statement in which the start time and the end time are recorded (S08). This usage specification is created as a block 71a of the block chain by electronically signing it with the secret key of the outlet type charging equipment 4 managed by the key management unit 472 as shown in FIG. Then, it is further signed with the secret key of the outlet type charging facility 4, and the usage statement is made the block 71b shared with the user (S09).

  After that, the outlet-type charging facility 4 notifies the user of the fact that the charging has been completed and the contents of the usage statement by displaying them on the screen display unit 46 (S10). When the outlet type charging facility 4 does not have the screen display unit 46, notification may be made by using a lamp or the like, or notification may be made via the charging application 30 of the user terminal 3.

  The user confirms the content of the notified usage statement, and touches the user terminal 3 on the NFC communication unit 45 of the outlet type charging facility 4 (S11). At this time, in the outlet-type charging facility 4, the outlet application 47 reads the secret key of the user managed by the key management unit 35 of the charging application 30 of the user terminal 3 via the communication session by NFC (S12). When the secret key is read, the energization control unit 43 disables the energization (S13), and unlocks the charging plug 22 inserted into the outlet 41 (S14). Thus, the user can remove the charging plug 22 from the outlet 41 (S15).

  In outlet type charging facility 4, when the user's secret key is read, outlet application 47 reads the user's private key and outlet charging facility 4 for the usage statement (block 71b) as shown in FIG. The electronic signature (MultiSig) with the private key of the key is used to determine the details of use to make a block 71c, and transfer the possession to the power company (S16). Through the above series of processes, the user can charge the electric vehicle 2 using the outlet-type charging facility 4.

<Flow of processing (at the time of billing)>
FIG. 6 is a flow chart outlining an example of the flow of processing at the time of charging of the usage fee in the present embodiment. In the present embodiment, as described above, the user 3 'using the charging service uses coins as a payment method of the usage fee, which is a good having exchangeable value issued by the power company 7' instead of money. It shall be paid, but it is not limited to this. For example, the money may be paid by coins or points issued by another business entity or the like, or may be paid by money.

  At a predetermined timing such as monthly, the electric power company 7 ′ adds up the usage details of the charging service for each user 3 ′, calculates the charge based on the usage time, and notifies each user 3 ′ to it. To do (S21). The means for notification is not particularly limited. For example, the charging application 30 on the user terminal 3 may be notified online, or may be notified by e-mail or postal mail. The user 3 'may access the usage detail management unit 73 or the like of the power company system 7 via the user terminal 3 or the like to be able to refer to the usage fee or the usage detail.

  The user 3 'receiving the notification of the usage charge purchases coins corresponding to the usage charge from the power company 7' (S22, S23). At the time of purchase, for example, as shown in the screen example on the lower left of FIG. 3, when the user confirms the usage details on the charging application 30 of the user terminal 3, an instruction to pay by coin is given, thereby the power company Link to the website of the clearing system such as coin service (not shown) provided by 7 ', so that you can buy coins of the required amount. If the balance of the coin held by the user 3 ′, which is managed by the balance management unit 34, is sufficient for the payment of the usage fee, it may not be necessary to purchase a coin.

  In the power company system 7 of the power company 7 ', the clearing system cooperation unit 74 corresponds to the usage charge purchased (or held) by the user 3' for coins managed for each account in the clearing system (not shown) The coins of the amount to be allocated are automatically distributed and transferred from the account of the user 3 'to the account of the collective housing manager 5' such as a management union of each collective housing 5 using the charging service (S24). When transfer of the coin to the account of each collective housing manager 5 'is completed for each user 3', the clearing system cooperation unit 74 instructs each collective housing manager 5 'who is a contractor from the power company 7'. Information of the electricity bill to be charged is acquired from the usage statement management section 73 (S25), and the coin of the amount equivalent to the electricity bill is transferred from the account of the collective housing manager 5 'to the account of the power company 7' Charge and settle the charges (S26).

  Then, when there is a shortage for the electricity bill, the remaining amount is actually charged to the collective housing manager 5 (S27), and the collective housing manager 5 'actually pays the billed remaining amount by money. (S28). According to such a charging model, processing relating to charging and clearing can be performed in a form that includes the user 3 ′ who has not concluded a contract for the power supply directly with the power company 7 ′.

  As described above, according to the charging system 1 which is an embodiment of the present invention, using the block chain technology, the usage details relating to charging are recorded on the block, so that tampering etc. to the usage details can be performed. It is possible to prevent “theft of electric power, prevent illegal billing, etc. and ensure the authenticity of the electricity usage statement”, and to be able to implement such a secure charging environment with a small development load. Become.

  Further, by installing the external outlet-type charging facility 4 with respect to the existing collective housing outlet 51 provided in the collective housing 5, it becomes possible to perform the pay-as-you-go charging according to the usage time of the charging service. As a result, it becomes unnecessary to provide facilities such as a watt-hour meter and a smart meter specified in the law to the multi-family house outlet 51, and the installation and operation costs of the charging infrastructure in the multi-family house 5 can be greatly reduced. It becomes.

  As mentioned above, although the invention made by the present inventor was concretely explained based on an embodiment, the present invention is not limited to the above-mentioned embodiment, and can be variously changed in the range which does not deviate from the summary. It goes without saying. For example, the above embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Moreover, it is possible to add, delete, and replace other configurations with respect to a part of the configurations of the above-described embodiment.

  In addition, each of the configurations, functions, processing units, processing means, etc. described above may be realized by hardware, for example, by designing part or all of them with an integrated circuit. Further, each configuration, function, etc. described above may be realized by software by the processor interpreting and executing a program that realizes each function. Information such as a program, a table, and a file for realizing each function can be placed in a memory, a hard disk, a recording device such as a solid state drive (SSD), or a recording medium such as an IC card, an SD card, or a DVD.

  Further, in each of the above-mentioned drawings, control lines and information lines indicate what is considered to be necessary for explanation, and not all control lines and information lines on mounting are necessarily shown. In practice, almost all configurations may be considered to be mutually connected.

  INDUSTRIAL APPLICABILITY The present invention is applicable to an electric vehicle charging system and an electric vehicle charging method for charging an electric vehicle of a resident in an apartment house.

DESCRIPTION OF SYMBOLS 1 ... Charging system, 2 ... Electric car, 3 ... User terminal, 3 '... User, 4 ... Outlet type charging equipment, 5 ... Apartment house, 5' ... Apartment house manager, 6 .. Internet, 7. Electric power company system, 7 '... electric power company,
21 ... Cable for charging, 22 ... Charging plug,
31 Account information management unit 32 NFC communication unit 33 Charging history management unit 34 Balance management unit 35 Key management unit
41 ... outlet, 42 ... plug lock control unit, 43 ... energization control unit, 44 ... PLC communication unit, 45 ... NFC communication unit, 46 ... screen display unit, 47 ... outlet application, 48 ... memory unit, 49 ... plug,
51 ... Residential housing outlet, 52 ... HD-PLC concentrator,
71 ... block chain processing unit, 71a to c ... block, 72 ... storage unit, 73 ... usage statement management unit, 74 ... clearing system cooperation unit,
471 ... charge time recording unit, 472 ... key management unit,
521 ... PLC communication unit

Claims (7)

A charging system that enables a user to charge an electric device,
Information processing system of the power supplier,
With charging base outlet installed in each charging base,
A charging facility that enables the electric device to be energized with electric power supplied from the power supplier via the charging point outlet by connecting the charging point outlet and a charging cable connected to the electric device. And
The charging facility is
Furthermore, it has a charging time recording unit that records usage detail information including the start time and the end time of charging of the electric device.
The charging system, wherein the usage detail information is recorded in a block on a block chain, the user and the private key of the charging facility are respectively electronically signed, the possession is transferred to the power supplier and recorded in the information processing system . In the charging system according to claim 1,
The charging facility is
A communication unit that performs wireless communication with an information processing terminal owned by the user;
The charging system which enables electricity supply to the said electrically-driven apparatus, when the public key which concerns on the said user is acquired from the said information processing terminal by the said communication part. In the charging system according to claim 2,
The information processing terminal is
The charging system which acquires the image information of the said electrically-driven apparatus together with the image information of the said user's face as biometrics information of the said user, and produces | generates the said public key based on the acquired said biometrics information. In the charging system according to claim 1,
The information processing system is
The usage detail information recorded in the block is totaled for each user and each charging base outlet, and a usage charge is calculated according to the charging time for each user,
With respect to balance information of money alternative goods issued by the power supplier, an amount corresponding to the corresponding usage charge is transferred from the account of the user to the account of the manager of the charging base outlet,
A charging system, wherein the electricity bill charged from the power supplier to the manager is settled by the balance of the money alternative in the manager's account. In the charging system according to claim 1,
The electric device is an electric car, a charging system. In the charging system according to claim 1,
The charging system is a collective housing. A charging method in a charging system that enables a user to charge an electric device,
By connecting a charging base outlet installed at each charging base and a charging cable connected to the electric device, the electric power supplied from the power supplier via the charging base outlet can be supplied to the electric device. The charging equipment that can be energized,
Recording usage statement information including start time and end time of charging of the electric device;
The usage detail information is recorded in a block on a block chain, the user and the charging facility each individually sign the electronic signature, and the possession is transferred to the power supplier and recorded in the information processing system of the power supplier. And the process of performing the charging method.

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