Authentication system and vehicle

Abstract

The invention provides an authentication system and a vehicle. The server executes a process including: a step of acquiring an upper limit number that can be stored when it is determined that there is a notification of a priority change; acquiring information of the stored digital certificate; a step for transmitting priority information when it is determined that a digital certificate having a higher priority than the existing digital certificate has been set; a step of transmitting data of the certificate; and a step for transmitting priority information when it is determined that a digital certificate having a higher priority than the existing digital certificate is not set.

Description

Technical Field

[0001] This disclosure relates to authentication systems. Background Technology

[0002] Japanese Patent Publication No. 2022-527902 discloses a charging station that uses a vehicle public key to verify a vehicle digital signature received from the vehicle, and can supply power to the vehicle upon successful verification.

[0003] Information regarding digital certificates, including the aforementioned vehicle digital signature, is stored in the vehicle's control unit via a communication network. However, since the number of digital certificates that can be stored in the vehicle's control unit is limited by storage capacity, standards, etc., it may be impossible to store all digital certificates, for example, in cases where there are usage contracts with multiple charging station companies. This could potentially reduce the convenience of charging stations corresponding to the unstored digital certificates. Summary of the Invention

[0004] The purpose of this disclosure is to provide an authentication system and vehicle that suppresses the increase in the number of stored digital certificates and the reduction in convenience.

[0005] The authentication system involved in any aspect of this disclosure has the following features:

[0006] The server sends the digital certificate used in authentication when utilizing the power station, which transmits power between the power station and the energy storage device installed in the electric vehicle; and

[0007] The vehicle includes a storage device for storing digital certificates received from the server.

[0008] If the server receives a digital certificate with the highest priority,

[0009] If the first priority is higher than the second priority of the existing digital certificate stored in the storage device, then the digital certificate with the first priority is sent to the vehicle.

[0010] If the first priority is lower than the second priority, the digital certificate of the first priority will not be sent to the vehicle.

[0011] In this way, since the digital certificate with the highest priority is sent to the vehicle when the first priority is higher than the second priority, the power station corresponding to the digital certificate with the highest priority can be used through the storage device in the vehicle. In addition, since the digital certificate with the highest priority is not sent when the first priority is lower than the second priority, the increase in the number of digital certificates stored in the vehicle's storage device can be suppressed, and the reduction in convenience can be suppressed by maintaining the high priority digital certificate.

[0012] In one implementation, when a vehicle receives a first-priority digital certificate, it replaces the existing digital certificate with the first-priority digital certificate.

[0013] In this way, even when the number of storable digital certificates is small, the reduction in convenience can be mitigated by maintaining high-priority digital certificates.

[0014] In another implementation, when the vehicle receives a digital certificate of first priority and the maximum number of digital certificates are stored in the storage device, it replaces the digital certificate of lowest priority among the multiple digital certificates with the digital certificate of first priority.

[0015] In this way, since the power station corresponding to the highest priority digital certificate can be used, the reduction in convenience can be suppressed.

[0016] In another embodiment, the authentication system includes a terminal. The terminal sets a first priority based on user input and sends information about the first priority to at least one of the server and the vehicle.

[0017] In this way, the server can determine whether or not a digital certificate should be sent to the vehicle based on the comparison result between the first priority and the second priority received by the terminal.

[0018] In another implementation, the vehicle sets a first priority based on user input and sends information about the first priority to the server.

[0019] In this way, the server can determine whether or not a digital certificate needs to be sent to the vehicle based on the comparison between the first priority and the second priority received by the vehicle.

[0020] In another implementation, the server sends information about the first priority to the vehicle after the first priority digital certificate has been stored in the storage device.

[0021] In this way, if the priority of the digital certificate stored in the vehicle's storage device changes, the digital certificate can be used according to the changed priority, thus suppressing the reduction in convenience.

[0022] In another implementation, the vehicle includes a navigation system. The vehicle can use digital certificates of power stations along or around the driving route set by the navigation system, prioritizing them over existing digital certificates, and send information about the prioritized priority to the server.

[0023] In this way, since the priority of the digital certificate for the power station that can be used on or around the driving route is set higher than that of the existing digital certificate, the vehicle can be charged quickly when using the power station while driving on the set driving route.

[0024] The vehicles involved in other aspects of this disclosure possess the following features:

[0025] Energy storage devices;

[0026] The storage device stores the digital certificate used in the authentication process when using the power station, and the power station and the energy storage device transmit power between them.

[0027] A communication device configured to communicate with a server that is the source of a digital certificate; and

[0028] The control device, upon receiving a digital certificate from the server, writes the digital certificate to a storage device.

[0029] The control device compares the first priority of the digital certificate obtained by the server with the second priority of the existing digital certificate stored in the storage device. If the priority order changes, the digital certificate that is given priority in the authentication when using the power station is changed. If the priority order does not change, the digital certificate that is given priority is not changed.

[0030] The above and other objects, features, aspects and advantages of the invention will become clear from the following detailed description of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0031] Figure 1 This is a diagram illustrating an example of the overall structure of the authentication system involved in this embodiment.

[0032] Figure 2 This is a timing diagram illustrating an example of the charging process between vehicles, power stations, and servers.

[0033] Figure 3 This is a flowchart illustrating an example of a process performed by a server.

[0034] Figure 4 This is a flowchart illustrating an example of a process performed by a vehicle.

[0035] Figure 5 This is a timing diagram illustrating an example of the operation of the authentication system involved in this embodiment.

[0036] Figure 6 This is a timing diagram illustrating another example of the operation of the authentication system involved in this embodiment. Detailed Implementation

[0037] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Where the same or equivalent reference numerals are used in the drawings, they will not be described repeatedly.

[0038] Figure 1 This diagram illustrates an example of the overall configuration of the authentication system 1 according to this embodiment. The authentication system 1 includes a vehicle 100, a power station 300, a server 400, a terminal 500, and an authentication authority 600.

[0039] Taking vehicle 100 as an example, which is a battery electric vehicle (BEV) without an engine, any electric vehicle that uses an electric motor as its drive source can be used, such as a hybrid electric vehicle (HEV) with an engine or a plug-in hybrid electric vehicle (PHEV). Vehicle 100 has an energy storage device 200 for storing electricity for driving. Vehicle 100 is configured to supply the electricity stored in the energy storage device 200 to the electric motor (rotary motor) for driving.

[0040] The power station 300 is configured to transmit power to the energy storage device 200 mounted on the vehicle 100. Specifically, the power station 300 is configured to charge the energy storage device 200 via a PnC (Plug and Charge) charging method. The PnC charging method refers to a charging method where the power station 300's connector 301 is connected to the vehicle 100's socket 160, automatically performing processes such as billing authentication and charging for using the power station 300. The power station 300 is envisioned as a DC (Direct Current) charging station, or for example, an AC (Alternating Current) charging station, or a power supply station capable of various power sources.

[0041] Server 400 includes a control unit 401, a storage unit 402, and a communication unit 403. The control unit 401 is composed of a processor such as a CPU (Central Processing Unit) and executes programs stored in the storage unit 402, including RAM (Random Access Memory). The communication unit 403 is configured to communicate with the communication unit 140 of vehicle 100 and the communication unit 503 of terminal 500 via a communication network (not shown).

[0042] Server 400 stores information related to vehicle 100, terminal 500, and user. Server 400 stores, for example, digital certificates used by vehicle 100 to utilize power station 300. Digital certificates are, for example, electronic certificates containing public key information. Examples of digital certificates include charging contract certificates. The charging contract certificate is a certificate proving the content of a contract between the mobile operator (MO) providing the charging service and the user of vehicle 100.

[0043] Certification Authority 600 contains servers belonging to the certification authority, which issue digital certificates upon application due to the expiration of existing digital certificates or the signing of new contracts. Certification Authority 600 then sends the issued digital certificates to Server 400.

[0044] The vehicle 100 is equipped with a monitoring module 130 and a control device (ECU: Electronic Control Unit) 150.

[0045] The monitoring module 130 includes various sensors that detect the state of the energy storage device 200 (e.g., voltage, current, and temperature), and outputs the detection results to the ECU 150. The monitoring module 130 may, in addition to the aforementioned sensor functions, also have SOC (State of Charge) estimation, SOH (State of Health) estimation, single-cell voltage equalization, diagnostic functions, and communication functions as a BMS (Battery Management System). The ECU 150 can obtain the state of the energy storage device 200 (e.g., temperature, current, voltage, SOC, and internal resistance) based on the output of the monitoring module 130. The energy storage device 200 is charged (external charging) or discharged (external power supply) through power exchange with the power station 300.

[0046] The ECU 150 is configured to perform charging and discharging control of the energy storage device 200. The ECU 150 includes a processor 151 composed of a CPU or the like, a RAM 152, a storage device 153, and a signal receiving unit 154.

[0047] RAM 152 functions as a working memory that temporarily stores data processed by processor 151.

[0048] Storage device 153 is configured to store information. In addition to the program, storage device 153 also stores information used by the program (e.g., mappings, formulas, and various parameters). Processor 151 executes the program stored in storage device 153 to perform various controls in ECU 150. Storage device 153 also stores the aforementioned digital certificate. ECU 150 controls charging certified by the digital certificate. If a new digital certificate is obtained, it is re-downloaded and written to storage device 153.

[0049] The signal receiving unit 154 receives specified signals from devices other than the ECU 150 mounted on the vehicle 100. The signal receiving unit 154 receives specified signals (information) from, for example, the HMI device 120 and the communication device 140 described later.

[0050] The vehicle 100 also includes a driving unit 110, an HMI (Human Machine Interface) device 120, a communication device 140, a port 160, a navigation system 170, and drive wheels W.

[0051] The driving unit 110 is configured to use the electricity stored in the energy storage device 200 to drive the vehicle 100. The driving unit 110 includes, for example, a PCU (Power Control Unit) consisting of an inverter, a converter, and a relay, an MG (Motor Generator) consisting of a three-phase AC rotating motor, and an SMR (System Main Relay) that switches the disconnection state of the power path between the energy storage device 200 and the PCU (all not shown).

[0052] The PCU and SMR are controlled by the ECU150. The MG is configured to be driven by the PCU, causing the drive wheel W to rotate. The PCU uses electricity supplied from the energy storage device 200 to drive the MG. In addition, the MG is configured to perform regenerative power generation, supplying the generated electricity to the energy storage device 200. The SMR is in a closed state (connected state) when the vehicle 100 is in motion.

[0053] The energy storage device 200 is composed of a secondary battery such as a nickel-metal hydride battery or a lithium-ion battery having a liquid electrolyte or a solid electrolyte. Alternatively, for example, the energy storage device 200 may be composed of a capacitor or the like instead of a secondary battery.

[0054] HMI device 120 includes an input device for receiving user input and a display device for displaying information to the user. HMI device 120 may also include a touch panel display. HMI device 120 displays information on the display device according to control signals from ECU 150.

[0055] The communication device 140 is configured, for example, to communicate with a terminal 500 (e.g., a smartphone) used by a user of the vehicle 100 and a server 400. The communication device 140 may also include a communication I / F such as a DCM (Data Communication Module) corresponding to a communication form specified by 5G (5th generation mobile communication system).

[0056] The socket 160 is configured in a shape into which the connector 301 of the power station 300 can be inserted. The connector 301 is located at the front end of the cable 302 installed in the power station 300. The vehicle 100 is electrically connected to the power station 300 by inserting the connector 301 into the socket 160. Thus, the transfer of electricity (charging, supplying electricity) between the power station 300 and the vehicle 100 can be performed.

[0057] For example, if the user sets a destination, the navigation system 170 sets the driving route to that destination. The navigation system 170 guides the user to the destination by displaying the vehicle's location on a map and the driving route on the display device of the HMI device 120 while the user is driving. Furthermore, the navigation system 170 is configured to search for the locations of power stations 300 along or around the driving route and display the search results (locations on a map, etc.) on the display device of the HMI device 120. The navigation system 170 is configured to communicate with the ECU 150.

[0058] Terminal 500 includes a control device 501, a storage device 502, a communication device 503, and a touch panel display 504. The control device 501 is composed of a processor such as a CPU, and executes programs stored in the storage device 502, including RAM. The communication device 503 is configured to communicate with the communication device 140 of vehicle 100 and the communication device 403 of server 400. The touch panel display 504 includes an input device for accepting user input and a display device for displaying information to the user (neither shown). Terminal 500 is the terminal for the user of vehicle 100. In server 400, corresponding storage is established for terminal 500, vehicle 100, and user. Specifically, server 400, for example, associates user identification information, vehicle identification information, and terminal identification information in storage device 402. Furthermore, server 400 also associates information about the digital certificate stored in vehicle 100 with this identification information in storage device 402.

[0059] Figure 2 This is a timing diagram illustrating an example of the charging process between vehicle 100, power station 300, and server 400.

[0060] In step (hereinafter referred to as step S) 10, the charging process between vehicle 100 and power station 300 begins. For example, the charging process begins when connector 301 is connected to socket 160.

[0061] In S20, a secure communication connection is established between vehicle 100 and power station 300.

[0062] In S30, a digital certificate stored in vehicle 100 is used to perform various authentications between vehicle 100 and power station 300. For example, it performs identification, authentication, and authorization processes.

[0063] In S40, perform settings. For example, perform target settings, charging plan settings, etc.

[0064] In S50, charging is performed between vehicle 100 and power station 300. In S60, charging ends.

[0065] For digital certificates used in the charging process as described above, the number of digital certificates that can be stored in the storage device 153 of the ECU 150 of the vehicle 100 is limited by storage capacity, standards, etc. Therefore, for example, in cases where there are utilization contracts with companies of multiple power stations 300, it may be impossible to store all the digital certificates, and the convenience of the power stations 300 corresponding to the unstored digital certificates may be reduced.

[0066] Therefore, in this embodiment, when the server 400 receives the priority (first priority) of a new digital certificate, if the first priority is higher than the priority (second priority) of the existing digital certificate stored in the storage device 153, the server 400 will send the new digital certificate to the vehicle 100; if the first priority is lower than the second priority, the server 400 will not send the new digital certificate to the vehicle 100.

[0067] In this way, since a new digital certificate is sent to vehicle 100 when the first priority is higher than the second priority, the power station 300 corresponding to the new digital certificate can be used through the storage device 153 stored in vehicle 100. Furthermore, since no new digital certificate is sent when the first priority is lower than the second priority, the increase in the number of digital certificates stored in storage device 153 of vehicle 100 can be suppressed, and the reduction in convenience can be suppressed by maintaining existing digital certificates with higher priority.

[0068] The following is for reference Figure 3An example of the processing performed by server 400 (specifically by control device 401) will be described. Figure 3 This is a flowchart illustrating an example of a process performed by server 400. The series of processes shown in this flowchart are executed repeatedly at a predetermined period.

[0069] In S100, server 400 determines whether there is a notification of a priority change. For example, if server 400 receives a notification of a priority change of a digital certificate from at least either vehicle 100 or terminal 500, it determines that there is a notification of a priority change.

[0070] For example, the user launches the application on terminal 500. The application displays a list of charging services subscribed to by the user, and a priority is set for each charging service. The user can set the priority of the charging services displayed in the list on the application. For example, if the user performs an input operation to change the priority, such as setting a newly subscribed charging service as the highest priority, changing the priority of at least two of the existing multiple charging services, or changing the highest priority of the existing multiple charging services, the terminal 500 notifies the server 400 of the priority change. The priority change notification includes information about the charging service whose priority has been changed. Alternatively, if the user performs the aforementioned priority change input operation, for example, on the touch panel display of the HMI device 120 of vehicle 100, the vehicle 100 notifies the server 400 of the priority change of the digital certificate as described above. If a priority change notification is determined (yes in S100), the process proceeds to S102.

[0071] In S102, server 400 obtains the maximum number of items that can be stored. For example, server 400 can associate the maximum number of items that can be stored with each managed vehicle 100 and store it in storage device 402, and read from storage device 402 the maximum number of items that can be stored for the vehicle 100 corresponding to the terminal 500 of the priority change notification source, or the vehicle 100 of the notification source. Alternatively, server 400 can associate the type of standard used with respect to digital certificates with each managed vehicle 100 and store it in storage device 402, and read from storage device 402 the type of standard used for the vehicle 100 corresponding to the terminal 500 of the priority change notification source, or the vehicle 100 of the notification source, and determine the maximum number of items that can be stored based on the read standard. Server 400 obtains the maximum number of storable digital certificates, for example, a vehicle 100 that adopts ISO 15118-2 (a standard related to digital certificates) as a predetermined standard, where the maximum number of storable digital certificates is "1", and a vehicle 100 that adopts ISO 15118-20 (a standard related to digital certificates) as a predetermined standard, where the maximum number of storable digital certificates is "2" or more. The predetermined number is a value determined based on the memory capacity of ECU 150, etc. Furthermore, server 400 can also obtain the maximum number of storable digital certificates from the vehicle 100 corresponding to the notification source terminal 500 or from the notification source vehicle 100. Afterwards, processing proceeds to S104.

[0072] In S104, server 400 retrieves the stored digital certificate information. Server 400 can read from storage device 402 the digital certificate information stored by associating it with the vehicle 100 corresponding to the notification source terminal 500 among the managed vehicles 100. For example, when sending the digital certificate to vehicle 100 after a charging service contract is completed, server 400 stores the digital certificate information in storage device 402 in association with that vehicle 100. Furthermore, server 400 can also retrieve digital certificate information from the vehicle 100 corresponding to the notification source terminal 500 or from the notification source vehicle 100. Afterwards, processing proceeds to S106.

[0073] In S106, server 400 determines whether a digital certificate with a higher priority than the existing digital certificate stored in storage device 153 of vehicle 100 has been set.

[0074] For example, if a new digital certificate corresponding to a newly signed charging service is set to have a higher priority than an existing digital certificate, the server 400 will determine that the new digital certificate has a higher priority than the existing one.

[0075] Alternatively, for example, if the digital certificate with the highest priority is different from the existing digital certificate stored in the storage device 153 of vehicle 100, server 400 determines that a digital certificate with a higher priority than the existing digital certificate has been set.

[0076] Alternatively, for example, if the priority of an existing digital certificate stored in the storage device 153 of vehicle 100 is changed to a lower priority than before the change, server 400 determines that a digital certificate with a higher priority than the existing digital certificate has been set. If it is determined that a digital certificate with a higher priority than the existing digital certificate has been set (in S106), the process proceeds to S108.

[0077] In S108, server 400 sends priority information to vehicle 100. The priority information includes information about the digital certificate corresponding to the changed priority. Processing then proceeds to S110.

[0078] In S110, server 400 sends the data of the highest priority digital certificate in the changed priority list to vehicle 100. If it is determined that no digital certificate with a higher priority than the existing digital certificate has been set (no in S106), the process is transferred to S112.

[0079] In S112, server 400 sends priority information to vehicle 100. Since the priority information is as described above, its detailed explanation will not be repeated. In the absence of notification of a priority change (which is not the case in S100), the process ends.

[0080] The following is for reference Figure 4 An example of the processing performed by vehicle 100 (specifically by ECU 150) will be illustrated. Figure 4 This is a flowchart illustrating an example of the processes performed by vehicle 100. The series of processes shown in this flowchart are repeatedly executed at predetermined intervals.

[0081] In S200, vehicle 100 determines whether priority information has been received. Since the priority information is as described above, its detailed explanation will not be repeated. If it is determined that priority information has been received (yes in S200), the process proceeds to S202.

[0082] In S202, vehicle 100 determines whether it has received digital certificate data. The digital certificate data includes the data of the highest priority digital certificate in the changed priority list. If it is determined that digital certificate data has been received (yes in S202), the process proceeds to S204.

[0083] In S204, vehicle 100 writes the received digital certificate data to storage device 153. For example, if the maximum number of digital certificates that can be stored in vehicle 100 is "1", vehicle 100 writes the received digital certificate after deleting existing digital certificates. For example, if the maximum number of digital certificates that can be stored in vehicle 100 is "2" or more and there is only one existing digital certificate, vehicle 100 can write the received digital certificate after deleting the existing digital certificate, or it can add the received digital certificate while maintaining the existing digital certificate. For example, if the maximum number of digital certificates that can be stored in vehicle 100 is "2" or more and there are multiple existing digital certificates, vehicle 100 can write the received digital certificate after deleting all existing digital certificates, after deleting the highest priority digital certificate among the existing digital certificates, or after deleting the lowest priority digital certificate among the existing digital certificates. The criteria for deleting existing digital certificates can be predetermined in vehicle 100, or specified by server 400 according to standards adopted in vehicle 100. Afterwards, the process proceeds to S208. Furthermore, if it is determined that no certificate data has been received (no in S202), the process is transferred to S206.

[0084] In S206, vehicle 100 determines whether the priority has changed. If the relationship between the digital certificate and the priority contained in the received priority information is consistent with the relationship between the digital certificate and the priority stored in the storage device 153 of vehicle 100, vehicle 100 determines that the priority has not changed; otherwise, it determines that the priority has changed. If the priority is determined to have changed (yes in S206), the process proceeds to S208.

[0085] In S208, vehicle 100 changes the priority of the digital certificate. Specifically, vehicle 100 changes the priority of the digital certificate to align the relationship between the digital certificate and its priority stored in the storage device 153 of vehicle 100 and the relationship between the digital certificate and its priority contained in the received priority information. Afterward, the process ends. Furthermore, if it is determined that priority information was not received (no in S200), or if it is determined that the priority has not been changed (no in S206), the process then ends.

[0086] Reference Figure 5 and Figure 6 An example of the operation of the authentication system 1 based on the above structure and flowchart will be explained.

[0087] Figure 5 This is a timing diagram illustrating an example of the operation of the authentication system 1 according to this embodiment. For example... Figure 5 As shown in (A-1), when the priority of the charging service is changed on the application of terminal 500, the terminal 500 notifies the server 400 of the change in priority setting.

[0088] In server 400, when a notification is determined to be a priority change (as is the case in S100), such as Figure 5 As shown in (B-1), the maximum storage quantity is obtained (S102), and as... Figure 5 As shown in (B-2), information about the digital certificate stored in the database is obtained (S104).

[0089] In server 400, if it is determined that a digital certificate with a higher priority than the existing digital certificate stored in storage device 153 of vehicle 100 has been set (in S106, this is true), then... Figure 5 As shown in (B-3), priority information is sent (S108), and as follows: Figure 5 As shown in (B-4), the data of the digital certificate is sent to vehicle 100 (S110).

[0090] In vehicle 100, if priority information is received (yes in S200) and digital certificate data is received (yes in S202), then as follows: Figure 5 As shown in (C-1), the digital certificate is written to the storage device 153 of the vehicle 100 (S204). Then, as... Figure 5 As shown in (C-2), update the priority information (S208).

[0091] Figure 6 This is a timing diagram illustrating another example of the operation of the authentication system 1 according to this embodiment. For example... Figure 6 As shown in (A-1), when the priority of the charging service is changed on the application of terminal 500, the terminal 500 notifies the server 400 of the change in priority setting.

[0092] In server 400, when a notification is determined to be a priority change (as is the case in S100), such as Figure 6 As shown in (B-1), the maximum storage quantity is obtained (S102), and as... Figure 6 As shown in (B-2), information about the digital certificate stored in the database is obtained (S104).

[0093] In server 400, if it is determined that there is no digital certificate with a higher priority than the existing digital certificate stored in storage device 153 of vehicle 100 (no in S106), then... Figure 6 As shown in (B-3), priority information is sent (S112).

[0094] In vehicle 100, if priority information is received (yes in S200) but digital certificate data is not received (no in S202), the priority has changed (yes in S206), therefore... Figure 5 As shown in (C-2), the priority information is updated (S208).

[0095] As described above, in the authentication system 1 according to this embodiment, since a digital certificate with a higher priority than a second priority (i.e., when a digital certificate with a higher priority than the existing digital certificate is set) is sent to the vehicle, the power station corresponding to the digital certificate with the first priority can be utilized through the storage device 153 stored in the vehicle 100. Furthermore, since a digital certificate with the first priority is not sent when the first priority is lower than the second priority, the increase in the number of digital certificates stored in the storage device 153 of the vehicle 100 can be suppressed. Therefore, an authentication system and vehicle that suppress the increase in the number of stored digital certificates and suppress the reduction in convenience can be provided.

[0096] The following describes some variations.

[0097] In the above embodiment, the case in which the server 400 is notified of a change in the priority setting due to user input at least in either the terminal 500 or the vehicle 100 is described as an example. However, if a driving route is set in the navigation system of the vehicle 100, the priority can also be changed and the server 400 is notified of the change in the priority setting by increasing the priority of the charging service of the power station 300 on or around the driving route.

[0098] In this way, since the priority of the digital certificate of the power station 300 that can be used on or around the driving route is set to be higher than the priority of the existing digital certificate, the vehicle 100 can quickly charge when using the power station 300 while driving on the set driving route.

[0099] Furthermore, in the above embodiment, the case in which the server 400 is notified of a change in the priority setting due to user input at least in either the terminal 500 or the vehicle 100 is described as an example. However, the terminal 500 may also set the priority of the charging service higher as the timing of the charging service contract is closer (the more recent it is), and notify the server 400 of the change in the priority setting.

[0100] In this way, since newer contracts for charging services are sometimes used more frequently than existing contracts, the power station 300 corresponding to the new contract can be quickly utilized through the storage device 153 stored in the vehicle 100.

[0101] Furthermore, in the above embodiment, the case in which the terminal 500 receives user input and changes the priority setting of the notification to the server 400 is described as an example. However, the terminal 500 may also change the priority setting of the notification not only to the server 400 but also to the vehicle 100.

[0102] In this way, priority changes can be made to the existing digital certificate stored in the storage device 153 of the vehicle 100 without waiting for priority information from the server 400.

[0103] Furthermore, the above-mentioned variations can also be implemented by appropriately combining all or part of them.

[0104] Embodiments of the present invention have been described, but should be considered as illustrative rather than restrictive in all respects. The scope of the invention is shown by the technical solutions and is intended to include all modifications within the meaning and scope of equivalents to the technical solutions.

Claims

1. An authentication system, wherein, have: The server sends the digital certificate used in the authentication process when using the power station, which transmits power between the power station and the energy storage device mounted on the electric vehicle. and The vehicle includes a storage device for storing the digital certificate received from the server. Upon receiving the digital certificate with the highest priority, the server... If the first priority is higher than the second priority of the existing digital certificate stored in the storage device, then the digital certificate with the first priority is sent to the vehicle. If the first priority is lower than the second priority, then the digital certificate of the first priority will not be sent to the vehicle.

2. The authentication system according to claim 1, wherein, Upon receiving the digital certificate of the first priority, the vehicle replaces the existing digital certificate with the digital certificate of the first priority.

3. The authentication system according to claim 1, wherein, When the vehicle receives the digital certificate of the first priority and a maximum number of the digital certificates are stored in the storage device, it replaces the digital certificate of the lowest priority among the multiple digital certificates with the digital certificate of the first priority.

4. The authentication system according to claim 1, wherein, The authentication system includes terminals. The terminal sets the first priority based on the user's input and sends information about the first priority to at least one of the server and the vehicle.

5. The authentication system according to claim 1, wherein, The vehicle sets the first priority based on the user's input and sends information about the first priority to the server.

6. The authentication system according to claim 1, wherein, If the digital certificate of the first priority has been stored in the storage device, the server will send information about the first priority to the vehicle.

7. The authentication system according to claim 1, wherein, The vehicle includes a navigation system. The vehicle can use the digital certificate of the power station on or around the driving route set by the navigation system to set a higher priority than the existing digital certificate, and send information about the set priority to the server.

8. A vehicle, wherein, have: Energy storage devices; A storage device for storing digital certificates used in authentication when utilizing a power station, and for transmitting power between the power station and the energy storage device; A communication device configured to communicate with a server that is the source of the digital certificate. as well as Upon receiving the digital certificate from the server, the control device writes the digital certificate into the storage device. The control device compares the first priority of the digital certificate obtained by the server with the second priority of the existing digital certificate stored in the storage device. If the priority order changes, the digital certificate will be given priority in authentication when using the power station. If the priority order remains unchanged, the digital certificate used in priority will not be changed.

Images