PNC-based electric vehicle charging control device and method

Abstract

The present invention provides a charging control device and method for a PnC-based electric vehicle. In a preferred embodiment of the present invention, if the validity of the contract certificate is authenticated but the settlement approval process performed before the actual charging and payment of charges fails, the initial target charging amount is divided into multiple sub-charging amounts, and charging and billing are performed sequentially for each sub-charging amount, thereby enabling charging up to the payable amount even if the user is unable to confirm the amount of charging power and charging charges that can be paid.

Description

Technical Field

[0001] The present invention relates to a charging control apparatus and method for an electric vehicle, and more specifically, to a Plug-and-Charge (PnC)-based charging control apparatus and method for an electric vehicle. Background Art

[0002] Recently, along with the active popularization of electric vehicles, problems related to the charging of electric vehicles have attracted attention, one of which is the problem of cost settlement during charging.

[0003] An electric vehicle starts charging after passing through a certain approval process. Representative approval methods include a PnC (Plug-and-Charge) method in which approval and settlement are automatically completed using a contract certificate stored in the vehicle, and an external settlement method in which identification, approval, and settlement are performed through the charger by means of an external identification means such as the vehicle user's credit card or RFID.

[0004] Among these methods, the PnC method, which has recently attracted much attention, is an automatic approval method that does not require the user to perform any special operation for charging settlement and automatically identifies the user to approve charging. Specifically, the PnC method refers to a method in which when a charging plug is inserted between an electric vehicle and a charging station, user authentication and charging are performed.

[0005] The ISO 15118 standard specifies authentication based on Public Key Infrastructure (PKI) as a foundation for implementing the PnC method. According to the PKI system based on the ISO 15118 standard, a contract certificate generated based on a MO Root Certificate (MORootCAcert.) issued by a Mobility Operator (MO) root certification authority (MORootCA) affiliated with the charging service operator (MO) is installed in an electric vehicle. A charging station certificate (SECCcert.) generated based on a V2G Root Certificate (V2GRootCAcert.) issued by a Vehicle-to-Grid (V2G) root certification authority (V2GRootCA) is installed in the charging station.

[0006] In the authentication and payment authorization processes, the charging station receives and verifies the contract certificate chain from the electric vehicle to confirm that the vehicle has a valid charging contract and then proceeds with the payment process.

[0007] However, with the conventional PnC charging payment method, before charging begins, only the validity of the contract certificate linked to the payment method (credit card, bank account, etc.) is authenticated. Once the validity of the contract certificate is authenticated, charging begins without any verification of payment capability, and after charging is complete, payment for the charging charge is requested from the payment method (credit card, bank account, etc.) linked to the contract certificate.

[0008] In this case, if the credit limit of the credit card linked to the contract certificate is exceeded, or if there are insufficient funds in the bank account, the actual payment will not be processed. As a result, although charging is complete, it becomes impossible to pay for the charge.

[0009] Furthermore, according to the ISO 15118 standard that currently defines the PnC charging method, even if you input the amount of power to be charged and try to check whether payment for that amount of power is possible before transmitting the charging power, you can only check whether payment is possible or not, and you cannot check information about what amount of power or money can be paid.

[0010] Therefore, from the user's perspective, if they receive a notification that payment for a specific amount of electricity is impossible, they have to re-enter the information to check if payment for other amounts of electricity is possible. If they receive another notification that payment is impossible in this case, they have to repeat the cumbersome process of re-entering and checking whether payment for yet another amount of electricity is possible. [Overview of the project] [Problems that the invention aims to solve]

[0011] The problem that the present invention aims to solve is to provide a charging control device and method for an electric vehicle based on a PnC charging system that can automatically charge the electric vehicle up to an amount payable by a payment method linked to a contract certificate when charging the electric vehicle based on the PnC charging system. [Means for solving the problem]

[0012] A preferred embodiment of the present invention for solving the aforementioned technical problems is a PnC-based electric vehicle charging control method performed in an electric vehicle charging control device including a memory for storing predetermined commands and a processor, comprising: (a) the processor requests a charging station to approve payment for the charging cost of an initial target charge amount, and if payment approval fails, divides the initial target charge amount into a plurality of sub-charge amounts; (b) the processor calculates the charging cost for each sub-charge amount and requests payment approval from the charging station; and (c) if payment approval for each sub-charge amount is successful, the processor charges the sub-charge amounts, settles the charges, checks whether the charging of the initial target charge amount is complete, and if the charging of the initial target charge amount is not complete, proceeds to step (b) and charges the next sub-charge amount.

[0013] Furthermore, a PnC-based electric vehicle charging control method according to another preferred embodiment of the present invention may further include, prior to step (a), the steps of: when a charging station is connected to the electric vehicle, the processor transmits a contract certificate stored in the memory to the charging station and requests authentication of the validity of the contract certificate; and, if the validity of the contract certificate is authenticated, the processor receives a charging bill from the charging station and calculates the charging cost of the initial target charge amount based on the charging bill.

[0014] Furthermore, a PnC-based electric vehicle charging control method according to another preferred embodiment of the present invention may further include the step of the processor disconnecting the charger connector and terminating the charging process if payment authorization fails for the subcharge amount.

[0015] Furthermore, in step (a), the processor may divide the initial target charge amount into a plurality of sub-charge amounts in units of a predetermined fixed amount of charge, divide the initial target charge amount into a plurality of sub-charge amounts in a predetermined ratio, or divide the initial target charge amount into a plurality of sub-charge amounts in units of charge that can be charged within a predetermined time.

[0016] Furthermore, in step (a), the processor may divide the initial target charge amount into a plurality of sub-charge amounts by dividing it in a predetermined ratio and repeatedly dividing the remainder of the initial target charge amount in the predetermined ratio.

[0017] Furthermore, the initial target charge amount may be set by input from the user terminal or may be pre-stored in the memory.

[0018] On the other hand, a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention for solving the aforementioned technical problems is an electric vehicle charging control device including a memory and a processor for storing predetermined commands, wherein the processor, having executed a command stored in the memory, performs the following steps: (a) requesting a charging station to approve the payment of the charging cost for the initial target charge amount, and if payment approval fails, dividing the initial target charge amount into a plurality of sub-charge amounts; (b) calculating the charging cost for the sub-charge amounts and requesting payment approval from the charging station; and (c) if payment approval for the sub-charge amounts is successful, charging the sub-charge amounts, settling the charges, confirming whether charging the initial target charge amount has been completed, and if charging the initial target charge amount has not been completed, proceeding to step (b) and charging the next sub-charge amount.

[0019] Furthermore, prior to step (a), the processor may perform the steps of: when a charging station is connected to an electric vehicle, the processor transmits a contract certificate stored in the memory to the charging station and requests authentication of the validity of the contract certificate; and, if the validity of the contract certificate is authenticated, the processor receives a charging bill from the charging station and calculates the charging cost of the initial target charge amount based on the charging bill.

[0020] Furthermore, if the processor fails to authorize payment for the sub-charge amount, it may further perform the step of disconnecting the charger connector and terminating the charging process.

[0021] Furthermore, in step (a), the processor may divide the initial target charge amount into a plurality of sub-charge amounts in units of a predetermined fixed amount of charge, divide the initial target charge amount into a plurality of sub-charge amounts in a predetermined ratio, or divide the initial target charge amount into a plurality of sub-charge amounts in units of charge that can be charged within a predetermined time.

[0022] Furthermore, in step (a), the processor may divide the initial target charge amount into a plurality of sub-charge amounts by dividing it in a predetermined ratio and repeatedly dividing the remainder of the initial target charge amount in the predetermined ratio.

[0023] Furthermore, the initial target charge amount may be set by input from the user terminal or may be pre-stored in the memory. [Effects of the Invention]

[0024] According to a preferred embodiment of the present invention for solving the above problem, a PnC-based charging control apparatus and method for an electric vehicle is characterized in that, if payment approval fails in a payment approval process executed after the validity of a contract certificate is authenticated but before actual charging and cost settlement are performed, an initial target charging amount is divided into a plurality of sub-charging amounts, and charging and billing settlement are sequentially performed for each sub-charging amount, thereby enabling automatic charging up to a payable amount even when a user cannot check a chargeable charging power amount and charging fee. [BRIEF DESCRIPTION OF THE DRAWINGS]

[0025] [Figure 1a] It is a diagram illustrating a charging process based on the ISO 15118-2 standard. [Figure 1b] It is a diagram illustrating a charging process based on the ISO 15118-2 standard. [Figure 2] It is a diagram showing the overall connection configuration of a PnC-based charging control apparatus for an electric vehicle according to a preferred embodiment of the present invention. [Figure 3] It is a block diagram showing the detailed configuration of a PnC-based charging control apparatus for an electric vehicle according to a preferred embodiment of the present invention. [Figure 4] It is a diagram illustrating the overall flow of a PnC-based charging control method for an electric vehicle according to a preferred embodiment of the present invention. [DETAILED DESCRIPTION OF THE EMBODIMENTS]

[0026] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0027] Here, the above-mentioned objects, features and advantages of the present invention will become more apparent through the following detailed description with reference to the accompanying drawings. However, while the present invention can be subjected to various modifications and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail below.

[0028] Throughout the specification, the same reference numerals generally indicate the same components. Furthermore, functions within the same conceptual scope as depicted in the drawings of each embodiment are described using the same reference numerals for the same components.

[0029] Throughout the specification, when a part is described as "containing" a component, this does not exclude other components unless otherwise stated, but rather means that other components may be included. Furthermore, terms such as "~part" and "module" used in the specification refer to a unit that processes at least one function or operation, which can be implemented in hardware, software, or a combination of hardware and software.

[0030] If a specific description of a known function or configuration related to the present invention is deemed likely to unnecessarily obscure the gist of the invention, such detailed description will be omitted. Furthermore, the numbers used in the description of this specification (e.g., 1st, 2nd, etc.) are merely identification symbols to distinguish one component from another.

[0031] The following example illustrates how the charging control device and method for an electric vehicle according to preferred embodiments of the present invention comply with the PnC (Plug-and-Charge) protocol specified in the ISO 15118-2 standard.

[0032] Except for the distinctive configurations of the present invention explicitly described below, the overall charging procedure and charging settlement procedure are identical to those applied to the aforementioned ISO 15118-2 standard.

[0033] First, referring to Figures 1a and 1b which illustrate the charging and settlement process according to the ISO 15118-2 standard, the charging and settlement process according to the ISO 15118-2 standard is described as follows: A SupportedAppProtocol step (S10) is performed between the charging station (SECC (Supply Equipment Communication Controller)) and the charging control device (EVCC (Electric Vehicle Communication Controller)) to send and receive messages for setting up an application layer protocol between EVCC and SECC. A SessionSetup step (S20) is performed in which EVCC sends a message requesting the establishment of a V2G communication session, and SECC responds via this message whether it is a new communication session or whether it has succeeded in joining a previous communication session, thereby establishing a communication channel between the charger (SECC) and the charging control device (EVCC).

[0034] Subsequently, a ServiceDiscovery step (S30) is performed in which the EVCC requests SECC to provide all service discoveries that can be offered by SECC, and SECC responds with available services such as AC charging, DC charging, EIM mode, plug and charge mode, and a ServiceDetail step (S40) is performed in which the EVCC requests specific additional information from SECC, and SECC provides the detailed parameter information.

[0035] The PaymentServiceSelection step (S50) in which EVCC requests a payment method (EIM / Plug-and-Charge) for services provided by SECC, and SECC responds with acceptance or rejection of the selected services and payment method; the CertificateInstallation step (S60) in which EVCC requests SECC to install a certificate if it does not have an installed contract certificate, and installs the requested contract certificate; the CertificateUpdate step (S70) in which EVCC requests renewal of a contract certificate if it has an expired contract certificate, and If the payment method is plug-and-charge, the following steps are performed sequentially: EVCC sends the contract certificate chain and EMAID to SECC to request a challenge; SECC verifies the EMAID and contract certificate chain and, if trustworthy, responds with a challenge in the form of a 128-bit random number in the PaymentDetail step (S80); and EVCC signs the request message body containing the challenge with the private key of the contract certificate, SECC verifies this signature, checks if it matches a previously sent challenge, and responds with whether or not to approve the charge in the Authorization step (S100).

[0036] Next, the EVCC and SECC transmit maximum and minimum allowable voltage levels and current amounts, exchange their respective technical charging limits, and the ChargeParameterDiscovery step (S110) is performed in which the EVCC notifies the SECC of the amount of power to be charged and the desired departure time, and the SECC proposes a charging schedule to the EVCC. Here, the charging schedule includes the maximum power that the electric vehicle can be charged while connected to the charging station and a selective SalesTariff.

[0037] Next, a CableCheck step (S120) is performed to check the cables for safe charging, a PreCharge step (S130) is performed to adjust the output voltage of the charging station to the battery voltage of the electric vehicle, and a PowerDelivery step (S140) is performed in which the EVCC requests power supply from the SECC by sending a PowerDeliveryReq, the EVCC sends a charging profile to be followed during the charging process, and the SECC, upon receiving the PowerDeliveryReq message, sends a PowerDeliveryRes message to the EVCC containing information on whether power is available.

[0038] Subsequently, the electric vehicle requests a specific current from the charging station by sending CurrentDemandReq, and the charging loop is executed by the CurrentDemand step, in which the SECC sends CurrentDemandRes to the EVCC, informing the electric vehicle of the status of the charging station and the current output voltage and current (S150).

[0039] Finally, the SessionStop step (S170) is executed, and the charging process using the PnC protocol ends.

[0040] The charging control method according to a preferred embodiment of the present invention described below was implemented in accordance with the ISO 15118-2 standard, and the contents not specifically described are the same as those specified in the ISO 15118-2 standard shown in Figures 1a and 1b.

[0041] Figure 2 is a diagram showing the overall coupling configuration of a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention, and Figure 3 is a block diagram showing the detailed configuration of the charging control device according to a preferred embodiment of the present invention.

[0042] Referring to Figures 2 and 3, a PnC-based electric vehicle charging control device 310 according to a preferred embodiment of the present invention is installed inside the electric vehicle, connected to a charging station 100 via a connector 200, controls the supply of charging power from the charging station 100 to the electric vehicle 300, and performs billing and settlement for the charging power.

[0043] Furthermore, the charging control device 310 is connected to the AVN controller 400a installed inside the vehicle, displays charging-related information to the user via the AVN, receives input on the amount of power to be charged from the user, and transmits it to the charging station.

[0044] Furthermore, the charging control device 310 is connected to the user's mobile communication terminal 400b via a short-range communication network such as Bluetooth® or a mobile communication network, transmits charging-related information to the mobile communication terminal 400b and displays it to the user, receives the amount of power to be charged entered by the user from the mobile communication terminal 400b and transmits it to the charging station.

[0045] Furthermore, in a modified embodiment of the present invention, the mobile communication terminal 400b can also connect directly to the charging station via a wireless communication network and transmit the amount of power to be charged.

[0046] In the following, for the sake of clarity, configurations that display information to users and allow users to input information will be collectively referred to as user terminals 400a and 400b, regardless of their installation location or implementation method, and the AVN controller 400a and mobile communication terminal 400b will also be included as user terminals.

[0047] The charging station 100 is connected to the charging circuit (not shown) and charging control device 310 of the electric vehicle 300 via a connector 200, and supplies charging power to the battery 340 via the charging circuit to charge the high-voltage battery 340. It not only sends and receives charging-related information with the charging control device 310, but also sends and receives charging billing information for charging billing and settlement using the PnC method.

[0048] The user, who is the driver of the electric vehicle to be charged, enters into a service agreement for PnC-related services with a Charge Point Operator (CPO), Mobility Operator (MO), or eMobility Service Provider (eMSP), and a certificate of the agreement is installed in the electric vehicle at the time of the first charge. Subsequently, the user selects the PnC service at a charging station 100 associated with the CPO, MO, or eMSP 500 and pays the charging fee.

[0049] Referring further to Figure 3, the electric vehicle may include a charging control device 310, an OBC 320, a BMS 330, and a high-voltage battery 340, and may further include an AVN controller 400a.

[0050] The OnBoard Charger (OBC) 320 converts AC power input from the charging station 100 via the connector 200 into DC power to charge the battery 340, while the Battery Management System (BMS) 330 controls the overall charging process within the electric vehicle.

[0051] The AVN controller 400a performs the function of outputting various information to the user and receiving information from the user. In connection with the present invention, the AVN controller 400a displays charging-related information to the user, receives the amount of charging power from the user, and outputs it to the charging control device 310.

[0052] The charging control device 310 installed in the vehicle includes a processor 311 and a memory 313. In a preferred embodiment of the present invention, the memory 313 can store commands that can be executed by the processor 311 and programs that are executed by the processor 311, and can also store input and output data. Examples of the memory 313 include SSD (Solid State Drive), flash memory, ROM (Read-Only Memory), RAM (Random Access Memory), etc.

[0053] A processor 311 according to a preferred embodiment of the present invention can be implemented as a CPU (Central Processing Unit) or a similar device (e.g., an MPU (Micro Processing Unit), an MCU (Micro Control Unit), etc.), and executes commands stored in memory 313 to perform each step of the charging control method described later with reference to Figure 4, and when performing PnC payment, it executes the functions of an EVCC (Electric Vehicle Communication Controller) to communicate with a SECC (Supply Equipment Communication Controller) provided in the charging station 100.

[0054] Furthermore, the processor 311 works in conjunction with the OBC (OnBoard Charger) 320 and the BMS (Battery Management System) 330 to control the output of DC power received from the charging station 100 via the connector 200 to the battery 340 so that the battery 340 is charged, or to control the output of AC power to the OBC 320, which is converted to DC power before charging the battery 340.

[0055] The specific functions of the charging control device 310 of the present invention will be described in more detail with reference to Figure 4.

[0056] Figure 4 is a diagram illustrating the overall flow of a charging control method for an electric vehicle according to a preferred embodiment of the present invention.

[0057] Referring further to Figure 4, the PnC-based electric vehicle charging control method performed by the electric vehicle charging control device 310 shown in Figures 2 and 3 will be explained. When the charger connector 200 of the charging station 100 is connected to the electric vehicle 300, with the user having previously concluded a PnC-related service usage contract with a charging station operator (CPO), mobility operator (MO), or mobility service provider (eMSP) and storing the contract certificate in the charging control device 310, steps S10 to S100 in Figure 1a are performed, the PnC charging process is started, the contract certificate stored in memory 313 is transmitted to the charging station 100, the charging station 100 authenticates the validity of the contract certificate, and if the authentication of the validity of the contract certificate fails, the charging process is terminated (S410).

[0058] Once the validity of the contract certificate is authenticated, the processor 311 receives the initial target charging energy amount from the user terminals 400a and 400b (S421). As described above, the processor 311 can receive charging energy input from the user terminals 400a and 400b via the AVN controller 400a, or the charging energy amount may be input through application programs (APPs) provided on the user terminals 400a and 400b, and the charging energy amount input by the user is set as the target charging energy amount (hereinafter abbreviated as "target charging amount"). At this time, the user can directly input the target charging amount in kWh units, or if the user inputs the target charging amount in monetary units, it can be converted to an energy amount in kWh units, or if the user inputs it in charging time, it can be converted to a target charging amount in kWh units that can be charged during that time.

[0059] If a default value for the charging power (for example, the amount of power needed to charge the battery to 80% of its full charge) is set in advance and stored in memory 313, the processor 311 can set the amount of power needed to charge the battery to the default value stored in memory 313 as the target charging amount, instead of receiving the charging power amount from the user terminals 400a and 400b. For example, if the current charge level is 20% and the default value is 80%, the amount of power needed to charge to 60% would be the target charging amount.

[0060] In the example shown in Figure 4, the processor 311 receives the initial target charge amount from user terminals 400a and 400b after the validity of the contract certificate has been authenticated. However, it should be noted that in another embodiment of the present invention, the charging control device 310 may be configured to authenticate the validity of the contract certificate when the charger connector 200 is connected, after the initial target charge amount has been received from user terminals 400a and 400b and stored in the memory 313.

[0061] The processor 311 transmits the initial target charge amount entered by the user to the charging station 100 and receives a charging schedule from the charging station 100 (S423). At this time, the charging schedule includes a charging billing table.

[0062] Upon receiving the charging bill table from the charging station 100, the processor 311 calculates the estimated total charging cost for the initial target charge amount based on the received charging bill table (S425).

[0063] Subsequently, the processor 311 requests the charging station 100 to approve the settlement of the estimated total charging cost (S427).

[0064] If payment authorization from the charging station 100 is successful (S430), the processor 311 proceeds from the steps shown in Figure 1b (S120) to perform a general PnC-based charging process (S441).

[0065] Once the general charging process is complete, payment is made for the charging charges corresponding to the amount of charge actually performed, and the user terminates the entire charging process by disconnecting the charger connector 200 from the electric vehicle 300 (S443).

[0066] On the other hand, if payment approval for the initial target charge amount fails from the charging station 100 in step S430, the processor 311 divides the initial target charge amount into several sub-charge amounts (S451), calculates the estimated charging cost for the first sub-charge amount, and requests payment approval from the charging station 100 (S453).

[0067] In step S451, the initial target charge amount can be divided into multiple sub-charge amounts in various ways. For example, the initial target charge amount can be divided into fixed charge units (e.g., 1 kWh, 5 kWh, 10 kWh, etc.). The initial target charge amount can be divided into charge units of a predetermined percentage (e.g., 10%, 20%, etc.) of the target charge amount. The initial target charge amount can be divided into charge units that can be charged within a predetermined time (e.g., 1 minute, 5 minutes, 10 minutes, etc.). How the division is performed in step (S451) can be predetermined by the user terminals 400a and 400b, and may also be set as the default.

[0068] In step S453, if the settlement approval for the sub-charge amount is successful (S455), the processor 311 performs a general PnC-based charging process on the settled sub-charge amount, starting from step S110 as shown in Figure 1b (S457), and settles the charging charge for the sub-charge amount (S459).

[0069] Subsequently, it is checked whether the initial target charge amount has been fully charged (i.e., whether there is any remaining sub-charge amount) (S460). If the target charge amount has been fully charged, the charger connector 200 is disconnected from the electric vehicle 300, and the charging process is terminated.

[0070] If, as confirmed in step S460, there are still sub-charge amounts that have not yet been charged, the process proceeds to step S453 to charge the next sub-charge amount. For example, if the target charge amount is 10kWh and there are multiple sub-charge amounts of 2kWh each, after the first sub-charge amount of 2kWh is charged, steps S453 to S459 are executed to charge the next sub-charge amount of 2kWh, and then steps S453 to S459 are executed sequentially for each subsequent sub-charge amount of 2kWh.

[0071] On the other hand, if payment authorization for the sub-charge amount fails in step S455 as described above, the entire charging process is terminated.

[0072] For example, if the initial target charge amount is 12 kWh and the charge amount that can be settled with an unverified contract certificate is 9 kWh, then if the initial target charge amount is divided into multiple sub-charge amounts of 2 kWh each, charging will be automatically completed up to the fourth sub-charge amount, but settlement approval will fail in the settlement approval step S455 for the fifth sub-charge amount, and the charging process will end.

[0073] In step S457 of the preferred embodiment of the present invention described above, charging is performed in units of a predetermined fixed amount or constant rate of sub-charge amounts. However, in another preferred embodiment of the present invention, charging can be performed by dividing the target charge amount and the remaining charge target amount at a constant ratio.

[0074] For example, in another embodiment of the present invention, in step S451, 50% of the target charge amount and 50% of the remaining target charge amount are divided in the same ratio, and steps S453 to S460 described above can be performed sequentially.

[0075] In this case, step S453 requests the charging station 100 to approve the charge payment for a sub-charge amount corresponding to 50% of the initial charge target amount. If the payment approval is successful, the charging is performed for 50% of the initial charge target amount, and then the charge payment is made.

[0076] Subsequently, for a sub-charge amount (25% of the initial target charge amount) corresponding to 50% of the remaining target charge amount (50% of the initial target charge amount), the charging station 100 is requested to approve the charge payment. If the payment approval is successful, the remaining 50% of the target charge amount (25% of the initial target charge amount) is charged, and then the charge payment is processed. Then, the above process is repeated for the remaining target charge amount (25% of the initial target charge amount).

[0077] The electric vehicle charging control method according to the preferred embodiments of the present invention described herein may be implemented as a computer program that is executable by a computer and stored on a non-temporary storage medium.

[0078] Storage media include all types of recording devices on which computer-readable data is stored. Examples of computer-readable storage media include ROM, RAM, CD-ROM, and optical data storage devices. Furthermore, computer-readable storage media can be distributed across networked computer systems, allowing computer-readable code to be stored and executed in a distributed manner.

[0079] To date, the present invention has been discussed primarily in terms of its preferred embodiments. Those with ordinary skill in the art to which the invention pertains will understand that the invention can be realized in modified forms that do not depart from its essential characteristics. Therefore, the disclosed embodiments should be considered in an explanatory rather than restrictive manner. The scope of the invention is defined in the claims, not in the foregoing description, and all differences within an equivalent scope should be construed as being included within the invention.

Claims

1. A PnC-based electric vehicle charging control method, which is performed in an electric vehicle charging control device including a memory and processor for storing predetermined commands, (a) The processor requests the charging station to approve payment for the initial target charge amount, and if payment approval fails, divides the initial target charge amount into a plurality of sub-charge amounts; (b) The processor calculates the charging cost for the subcharge amount and requests payment approval from the charging station; and (c) If payment authorization is successful for the sub-charge amount, the processor charges the sub-charge amount, settles the charge, checks whether the charging of the first target charge amount is complete, and if the charging of the first target charge amount is not complete, proceeds to step (b) and charges the next sub-charge amount; A charging control method for a PnC-based electric vehicle, characterized by including the following:

2. Before step (a) above, When an electric vehicle is connected to a charging station, the processor transmits the contract certificate stored in the memory to the charging station and requests authentication of the validity of the contract certificate; and If the validity of the contract certificate is verified, the processor receives a charging table from the charging station and calculates the charging cost for the initial target charge based on the charging table; A charging control method for a PnC-based electric vehicle according to claim 1, further comprising:

3. The charging control method for a PnC-based electric vehicle according to claim 1, further comprising the step of the processor disconnecting the charger connector and terminating the charging process if payment authorization fails for the sub-charge amount.

4. In step (a) above, the processor The initial target charge amount is divided into multiple sub-charge amounts using a predetermined fixed charge amount unit, or The initial target charge amount is divided into multiple sub-charge amounts according to a predetermined ratio, or The initial target charge amount is divided into multiple sub-charge amounts in units of charge amounts that can be charged within a predetermined time. The charging control method for a PnC-based electric vehicle according to feature 1.

5. In step (a) above, The charging control method for a PnC-based electric vehicle according to claim 1, characterized in that the processor divides the initial target charge amount into a predetermined ratio, and repeatedly divides the remainder of the initial target charge amount into a plurality of sub-charge amounts by the predetermined ratio.

6. The charging control method for a PnC-based electric vehicle according to claim 1, characterized in that the initial target charge amount is either input and set from the user terminal or is pre-stored in the memory.

7. A computer-readable recording medium storing a program for executing the charging control method for an electric vehicle according to any one of claims 1 to 6.

8. A charging control device for an electric vehicle, including a memory and processor for storing predetermined commands, The processor that executed the command stored in the memory said, (a) Requesting payment approval for the initial target charge amount from the charging station, and if payment approval fails, dividing the initial target charge amount into multiple sub-charge amounts; (b) the step of calculating the charging cost for the sub-charge amount and requesting payment approval from the charging station; and (c) If payment approval is successful for the sub-charge amount, charge the sub-charge amount, settle the charge, and confirm whether the charging of the first target charge amount has been completed. If the charging of the first target charge amount has not been completed, proceed to step (b) and charge the next sub-charge amount; A charging control device for a PnC-based electric vehicle, characterized by performing the following:

9. The processor, prior to step (a), When an electric vehicle is connected to a charging station, the processor transmits the contract certificate stored in the memory to the charging station and requests authentication of the validity of the contract certificate; and A PnC-based electric vehicle charging control device according to claim 8, further comprising the steps of: if the validity of the contract certificate is authenticated, the processor receives a charging bill from the charging station and calculates the charging cost of the initial target charge based on the charging bill;

10. The aforementioned processor, The charging control device for a PnC-based electric vehicle according to claim 8, further characterized in that if payment authorization fails for the aforementioned sub-charge amount, the charger connector is disconnected and the charging process is terminated.

11. In step (a) above, the processor The initial target charge amount is divided into multiple sub-charge amounts using a predetermined fixed charge amount unit, or The initial target charge amount is divided into multiple sub-charge amounts according to a predetermined ratio, or The charging control device for a PnC-based electric vehicle according to claim 8, characterized in that the initial target charge amount is divided into a plurality of sub-charge amounts in units of charge amount that can be charged within a predetermined time.

12. In step (a) above, The charging control device for a PnC-based electric vehicle according to claim 8, characterized in that the processor divides the initial target charge amount into a plurality of sub-charge amounts by dividing the remainder of the initial target charge amount into a plurality of sub-charge amounts by repeatedly dividing the remainder of the initial target charge amount into a plurality of sub-charge amounts.

13. The charging control device for a PnC-based electric vehicle according to claim 8, characterized in that the initial target charge amount is either input and set from the user terminal or is pre-stored in the memory.

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