Pnc-based electric vehicle charging control device and method

Abstract

The present invention provides a PnC-based electric vehicle charging control device and method. A PnC-based electric vehicle charging control device and method according to a preferable embodiment of the present invention comprise: in a case where validity of a contract certificate has been authenticated, but payment approval fails during a payment approval procedure performed before execution of actual power charging and payment for fees, dividing an initial target charging amount into multiple sub-charging amounts; and sequentially charging power and making payments for fees with respect to the respective sub-charging amounts, thereby enabling automatic power charging up to a payable amount even in a state where a user is unable to identify a payable amount of charging power and charging fees.

Description

PNC-based electric vehicle charging control device and method

[0001] The present invention relates to an electric vehicle charging control device and method, and more particularly, to an electric vehicle charging control device and method based on PnC (Plug-and-Charge).

[0002] As electric vehicles become more widespread, issues related to electric vehicle charging are emerging, one of which is the issue of payment for charging.

[0003] Electric vehicles begin charging after a set approval process. Approval methods include Plug-and-Charge (PnC), which automatically completes approval and payment using a contract certificate stored in the vehicle, and external payment, which uses external identification methods such as the vehicle user's credit card or RFID to identify, approve, and pay through the charger.

[0004] Among these, the recently popular PnC method doesn't require any additional steps from the user to complete the charging process. It automatically identifies the user and approves the charging process. Specifically, the plug-and-charge method refers to a method in which user authentication and charging are completed simply by inserting a charging plug between the electric vehicle and the charging station.

[0005] The ISO 15118 standard defines authentication based on a public key infrastructure (PKI) as the foundation for implementing the plug-and-charge method. According to the PKI system based on the ISO 15118 standard, a contract certificate generated based on the MO root certificate (MO RootCA cert.) issued by the MO Root Certification Authority (MO RootCA) affiliated with the charging business operator (MO) is installed in the electric vehicle. A charging station certificate (SECC cert.) generated based on the V2G root certificate (V2G RootCA cert.) issued by the Vehicle-to-Grid (V2G) Root Certification Authority (V2G RootCA) is installed in the charging station.

[0006] During the authentication and payment approval process, the charging station accepts and verifies the contract certificate chain from the electric vehicle, verifies that the vehicle has a valid charging contract, and performs the payment process.

[0007] However, in the case of the conventional PnC charging payment method, before initiating charging, only the validity of the contract certificate linked to the payment method (credit card, bank account, etc.) is verified, and once the validity of the contract certificate is verified, charging is initiated without verification of payment ability, and after charging is completed, payment for the charging fee is requested using the payment method (credit card, bank account, etc.) linked to the contract certificate.

[0008] In this case, if the credit card linked to the contract certificate exceeds its limit or the bank account balance is insufficient, the actual payment cannot be processed. Consequently, the recharge is completed, but payment of the recharge fee is impossible.

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

[0010] Therefore, from the user's perspective, if they are notified that payment for a specific amount of electricity is not possible, they must re-enter information to check whether payment for a different amount of electricity is possible, and if they are notified that payment is not possible in this case as well, they must again re-enter information to check whether payment for a different amount of electricity is possible, etc., which is a cumbersome process that must be repeated.

[0011] The problem to be solved by the present invention is to provide a PnC-based electric vehicle charging control device and method that can automatically charge up to an amount payable by a payment method linked to a contract certificate when charging an electric vehicle according to the PnC charging method.

[0012] According to a preferred embodiment of the present invention for solving the above-described technical problem, a PnC-based electric vehicle charging control method is provided, which is performed in an electric vehicle charging control device including a memory storing predetermined commands and a processor, and includes the steps of: (a) the processor requesting payment approval for a charging cost of an initial target charging amount from a charging station, and if payment approval fails, dividing the initial target charging amount into a plurality of sub-charging amounts; (b) the processor calculating a charging cost for the sub-charging amounts and requesting payment approval from the charging station; and (c) if payment approval for the sub-charging amounts is successful, the processor performing charging for the sub-charging amounts and then paying the fee, and checking whether charging of the initial target charging amount is completed, and if charging of the initial target charging amount is not completed, proceeding to step (b) and performing charging for a next sub-charging amount.

[0013] In addition, a PnC-based electric vehicle charging control method according to another preferred embodiment of the present invention may further include, before step (a), a step in which, when a charging station is connected to an electric vehicle, the processor transmits a contract certificate stored in the memory to the charging station to request authentication of the validity of the contract certificate; and a step in which, when the validity of the contract certificate is authenticated, the processor receives a charging rate table from the charging station and calculates a charging cost of the initial target charging amount according to the charging rate table.

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

[0015] Additionally, in the step (a), the processor may divide the initial target charge amount into a plurality of sub-charge amounts in units of a predefined quantity of charge amount, divide the initial target charge amount into a plurality of sub-charge amounts in a predefined ratio, or divide the initial target charge amount into a plurality of sub-charge amounts in units of a charge amount that can be charged for a predefined period of time.

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

[0017] Additionally, the initial target charge amount may be input and set from the user terminal or may be stored in advance in the memory.

[0018] Meanwhile, a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention for solving the above-described technical problem is an electric vehicle charging control device including a memory storing predetermined commands and a processor, wherein the processor executing the commands stored in the memory performs the following steps: (a) requesting payment approval for a charging cost of an initial target charging amount from a charging station, and if payment approval fails, dividing the initial target charging amount into a plurality of sub-charging amounts; (b) calculating a charging cost for the sub-charging amounts and requesting payment approval from the charging station; and (c) if payment approval for the sub-charging amounts is successful, performing charging for the sub-charging amounts and then paying the fee, and checking whether charging of the initial target charging amount is completed, and if charging of the initial target charging amount is not completed, proceeding to step (b) and performing charging for a next sub-charging amount.

[0019] In addition, the processor may further perform, prior to step (a), a step of requesting authentication of the validity of the contract certificate by transmitting the contract certificate stored in the memory to the charging station when a charging station is connected to the electric vehicle; and a step of receiving a charging rate table from the charging station and calculating a charging cost of the initial target charging amount according to the charging rate table when the validity of the contract certificate is authenticated.

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

[0021] Additionally, in step (a), the processor may divide the initial target charge amount into a plurality of sub-charge amounts in units of charge amounts defined in advance, divide the initial target charge amount into a plurality of sub-charge amounts in units of charge amounts that can be charged for a predefined period of time, or divide the initial target charge amount into a plurality of sub-charge amounts in units of charge amounts that can be charged for a predefined period of time.

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

[0023] Additionally, the initial target charge amount may be input and set from the user terminal or may be stored in advance in the memory.

[0024] In order to solve the above-described problem, a PnC-based electric vehicle charging control device and method according to a preferred embodiment of the present invention divides an initial target charging amount into a plurality of sub-charging amounts and sequentially performs charging and payment for each sub-charging amount when the validity of a contract certificate has been authenticated but payment approval fails in the payment approval process performed before actual charging and payment of costs are made, thereby automatically charging up to the payable amount even when the user cannot check the charging power amount and charging fee that can be paid.

[0025] Figures 1a and 1b are drawings illustrating a charging process according to the ISO 15118-2 standard.

[0026] FIG. 2 is a drawing showing the overall connection configuration of a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention.

[0027] FIG. 3 is a block diagram showing a detailed configuration of a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention.

[0028] FIG. 4 is a drawing illustrating the overall flow of a PnC-based electric vehicle charging control method according to a preferred embodiment of the present invention.

[0029] Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

[0030] Here, the above-described objects, features, and advantages of the present invention will become more apparent through the following detailed description related to the attached drawings. However, since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail below.

[0031] Throughout the specification, the same reference numbers, in principle, indicate the same components. In addition, components with the same function within the scope of the same concept shown in the drawings of each embodiment are described using the same reference numbers.

[0032] When a part of the specification is said to "include" a component, this does not exclude other components, but rather implies the inclusion of other components, unless otherwise specifically stated. Furthermore, terms such as "part," "module," etc., used throughout the specification refer to a unit that processes at least one function or operation, which may be implemented in hardware, software, or a combination of hardware and software.

[0033] If a detailed description of a known function or configuration related to the present invention is deemed to unnecessarily obscure the gist of the present invention, such detailed description will be omitted. Furthermore, numbers (e.g., "first," "second," etc.) used throughout the description of this specification are merely identifiers used to distinguish one component from another.

[0034]

[0035] The electric vehicle charging control device and method according to a preferred embodiment of the present invention, which will be described below, exemplarily follows the Plug-and-Charge (PnC) protocol specified in the ISO 15118-2 standard.

[0036] Except for the characteristic configurations of the present invention explicitly described below, the overall charging procedure and charging payment procedure are identical to those applied to the above-mentioned ISO 15118-2 standard.

[0037] First, referring to FIG. 1a and FIG. 1b, which describe the charging and payment process according to the ISO 15118-2 standard, the charging and payment process according to the ISO 15118-2 standard is described. The SupportedAppProtocol step (S10) is performed to exchange messages for setting up an application layer protocol between a charging station (abbreviated as SECC (Supply Equipment Communication Controller)) and a charging control device (abbreviated as EVCC (Electric Vehicle Communication Controller)), and the EVCC and the SECC, and the SessionSetup step (S20) is performed to transmit a message requesting the opening of a V2G communication session, and the SECC responds through the message whether a new communication session or a previous communication session has been successfully joined, thereby establishing a communication channel between the charger (SECC) and the charging control device (EVCC).

[0038] After that, the ServiceDiscovery step (S30) is performed in which the EVCC requests the SECC to search for all services provided by the SECC, and the SECC responds with services that can be provided, such as AC charging, DC charging, EIM mode, and plug-and-charge mode, and the ServiceDetail step (S40) is performed in which the EVCC requests the SECC for specific additional information, and the SECC provides the corresponding detailed parameter information.

[0039] The EVCC requests a payment method (EIM / Plug-and-Charge) for the service provided by the SECC, and the SECC responds whether to accept the selected service and payment method. The CerificateInstallation step (S50) in which the EVCC requests the SECC to install a certificate if there is no installed contract certificate and installs the requested contract certificate. The CerificateUpdate step (S70) in which the EVCC requests the renewal of a contract certificate if there is a contract certificate that is about to expire. The PaymentDetail step (S80) in which the EVCC requests a challenge by sending the contract certificate chain and EMAID to the SECC if the payment method is plug-and-charge, and the SECC verifies the EMAID and the contract certificate chain and, if they are trustworthy, responds with a challenge in the form of a 128-bit random number. The EVCC signs the request message body containing the challenge with the private key of the contract certificate, and the SECC verifies this signature and verifies that it matches the previously sent challenge and responds whether to approve the charge. The Authorization step (S100) is performed sequentially.

[0040] Next, the EVCC and SECC exchange their respective technical charging limits by communicating the maximum and minimum allowable voltage levels and currents, the EVCC notifies the SECC of the charging power and desired departure time, and the SECC proposes a charging schedule to the EVCC in the ChargeParameterDiscovery step (S110). The charging schedule includes the maximum charging power that can be delivered while the EV is connected to the charging station and an optional SalesTariff.

[0041] Next, a CableCheck step (S120) is performed to perform a cable check 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 to the SECC by transmitting PowerDeliveryReq and transmits a charging profile to be followed by the EVCC during the charging process, and the SECC, upon receiving the PowerDeliveryReq message, transmits a PowerDeliveryRes message containing information on whether power is available to the EVCC.

[0042] After that, the electric vehicle requests a specific current from the charging station by transmitting CurrentDemandReq, and the SECC transmits CurrentDemandRes to the EVCC, which informs the electric vehicle of the status of the charging station and the current output voltage and current, thereby performing a charging loop (S150).

[0043] Finally, the SessionStop step (S170) is performed, terminating the charging process according to the PnC protocol.

[0044] The charging control method according to a preferred embodiment of the present invention described below is performed based on the above-described ISO 15118-2 standard, and contents not specifically described are the same as those specified in the ISO 15118-2 standard illustrated in FIGS. 1a and 1b.

[0045]

[0046] FIG. 2 is a drawing showing the overall connection configuration of a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention, and FIG. 3 is a block diagram showing a detailed configuration of a charging control device according to a preferred embodiment of the present invention.

[0047] Referring to FIGS. 2 and 3, a PnC-based electric vehicle charging control device (310) according to a preferred embodiment of the present invention is installed inside an electric vehicle, connected to a charging station (100) through a connector (200), controls the supply of charging power from the charging station (100) to the electric vehicle (300), and performs payment for the charging power.

[0048] In addition, the charging control device (310) is connected to the AVN controller (400a) installed in the vehicle, displays charging-related information to the user through the AVN, receives an input of the amount of power to be charged from the user, and transmits the input to the charging station.

[0049] In addition, the charging control device (310) is connected to the user's mobile communication terminal (400b) through a short-range communication network or mobile communication network such as Bluetooth, transmits charging-related information to the mobile communication terminal (400b) and displays it to the user, and receives the amount of power to be charged input by the user from the mobile communication terminal (400b) and transmits it to the charging station.

[0050] Additionally, in a modified embodiment of the present invention, the mobile communication terminal (400b) may directly connect to the charging station through a wireless communication network and transmit the amount of power to be charged.

[0051] Hereinafter, for convenience of explanation, the configuration for displaying information to the user and receiving information from the user is collectively referred to as a user terminal (400a, 400b) regardless of the installation location or implementation method, and the above-mentioned AVN controller (400a) and mobile communication terminal (400b) are also included in the user terminal (400a, 400b).

[0052] The charging station (100) is connected to a charging circuit (not shown) and a charging control device (310) of an electric vehicle (300) through a connector (200), supplies charging power to a battery (340) through the charging circuit to charge the high-voltage battery (340), and not only mutually transmits and receives charging-related information with the charging control device (310), but also mutually transmits and receives charging fee payment information for performing charging fee payment in a Plug-and-Charge manner.

[0053] Users who operate electric vehicles to charge enter into a PnC-related service agreement with a Charge Point Operator (CPO), Mobility Operator (MO), or eMobility Service Provider (eMSP), and a contract certificate is installed in the electric vehicle upon initial charging. Thereafter, the user selects the PnC service at a charging station (100) associated with the CPO, MO, or eMSP (500) and pays the charging fee.

[0054]

[0055] Referring further to FIG. 3, the electric vehicle includes a charging control device (310), an OBC (320), a BMS (330), and a high-voltage battery (340) inside, and may further include an AVN controller (400a) inside.

[0056] The OBC (OnBoard Charger) (320) converts AC power input from the charging station (100) through the connector (200) into DC power to charge the battery (340), and the BMS (Battery Management System) (330) controls the overall charging process within the electric vehicle.

[0057] The AVN controller (400a) performs functions of outputting various information to the user and receiving information input from the user. In relation to the present invention, the AVN controller (400a) displays charging-related information to the user, receives charging power input from the user, and outputs it to the charging control device (310).

[0058] A charging control device (310) installed in a vehicle includes a processor (311) and a memory (313). The memory (313) according to a preferred embodiment of the present invention can store instructions executable by the processor (311) and programs executed by the processor (311), and can also store input / output data. Examples of the memory (313) may include a solid state drive (SSD), flash memory, read-only memory (ROM), random access memory (RAM), etc.

[0059] A processor (311) according to a preferred embodiment of the present invention may be implemented as a CPU (Central Processing Unit) or a similar device (e.g., MPU (Micro Processing Unit), MCU (Micro Controll Unit), etc.), and executes commands stored in a memory (313) to perform each step of the charging control method described below with reference to FIG. 4, and performs the function of an EVCC (Electric Vehicle Communication Controller) in performing PnC payment to communicate with a SECC (Supply Equipment Communication Controller) installed in a charging station (100).

[0060] In addition, the processor (311) is linked with the OBC (OnBoard Charger) (320) and the BMS (Battery Management System) (330) to control DC power received from the charging station (100) through the connector (200) to be output to the battery (340) to charge the battery (340), or AC power is output to the OBC (320) to be converted into DC power and then charge the battery (340).

[0061] The specific function of the charging control device (310) of the present invention will be described in more detail with reference to FIG. 4.

[0062]

[0063] FIG. 4 is a drawing illustrating the overall flow of an electric vehicle charging control method according to a preferred embodiment of the present invention.

[0064] Referring further to FIG. 4, a PnC-based electric vehicle charging control method performed in the electric vehicle charging control device (310) illustrated in FIGS. 2 and 3 will be described. When a user has previously entered into a PnC-related service use agreement with a charge point operator (CPO), a mobility operator (MO), or an eMobility service provider (eMSP) and has stored a contract certificate in the charging control device (310), and when the charger connector (200) of the charging station (100) is connected to the electric vehicle (300), steps S10 to S100 of FIG. 1A are performed, and a PnC charging process is initiated, so that the contract certificate stored in the memory (313) is transmitted to the charging station (100), and the charging station (100) authenticates the validity of the contract certificate, and if the validity authentication of the contract certificate fails, the charging process is terminated (S410).

[0065] When the validity of the contract certificate is verified, the processor (311) receives the initial target charging power amount from the user terminal (400a, 400b) (S421). As described above, the processor (311) can receive the charging power amount from the user terminal (400a, 400b) through the AVN controller (400a), and can also receive the charging power amount through the application program (APP) installed in the user terminal (400a, 400b), and the charging power amount input by the user is set as the target charging power 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, this can be converted into the power amount in KWh units, and if the user inputs the charging time, this can be converted into the target charging amount in KWh units that can be charged at the corresponding time.

[0066] If a default value of the charging power (e.g., a charging amount that charges up to 80% of the battery's full charge) is set in advance and stored in the memory (313), the processor (311) may, instead of receiving the charging power input from the user terminal (400a, 400b), set the charging power required to charge up to the default value stored in the memory (313) as the target charging amount. For example, if the current charging amount is 20% and the default value is 80%, the power amount for charging up to 60% becomes the target charging amount.

[0067] In the example illustrated in FIG. 4, an example is described in which the processor (311) receives an initial target charging amount from the user terminal (400a, 400b) after the validity of the contract certificate is authenticated. However, in another embodiment of the present invention, it should be noted that the charging control device (310) may be configured to receive an initial target charging amount from the user terminal (400a, 400b), store it in the memory (313), and then authenticate the validity of the contract certificate when the charger connector (200) is connected.

[0068] The processor (311) transmits the initial target charging amount input 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 rate table.

[0069] The processor (311) that receives the charging rate table from the charging station (100) calculates the expected total charging cost for the initial target charging amount according to the received charging rate table (S425).

[0070] After that, the processor (311) requests payment approval for the expected total charging cost from the charging station (100) (S427).

[0071] If payment approval from the charging station (100) is successful (S430), the processor (311) performs a general PnC-based charging process starting from step S120 illustrated in FIG. 1b (S441).

[0072] When the general charging process is completed, payment is made for the charging fee equivalent to the actual charging performed, and the user disconnects the charger connector (200) from the electric vehicle (300), thereby ending all charging processes (S443).

[0073] Meanwhile, in step S430, if payment approval for the initial target charging amount from the charging station (100) fails, the processor (311) divides the initial target charging amount into multiple sub-charging amounts (S451), calculates the expected charging cost for the first sub-charging amount, and requests payment approval from the charging station (100) (S453).

[0074] 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 charge amount units of a fixed amount (e.g., 1 KWh, 5 KWh, 10 KWh, etc.). The initial target charge amount can be divided into charge amount units of a predefined percentage (%) (e.g., 10%, 20% of the target charge amount, etc.). The initial target charge amount can be divided into charge amount units that can be charged during a predefined time (e.g., 1 minute, 5 minutes, 10 minutes, etc.). In step S451, the method by which the division is performed can be preset by the user terminal (400a, 400b) or can be preset as a default.

[0075] In step S453, if payment approval for the sub-charge amount is successful (S455), the processor (311) performs a general PnC-based charging process for the approved payment sub-charge amount starting from step S110 shown in FIG. 1b (S457), and pays the charging fee for the sub-charge amount (S459).

[0076] After that, it is checked whether the initial target charge amount has been fully charged (i.e., whether there is a remaining sub-charge amount) (S460), and if the target charge amount has been fully charged, the charger connector (200) is disconnected from the electric vehicle (300) to end the charging process.

[0077] If, as a result of checking at step S460, there is a sub-charge amount that has not yet been completed, the process proceeds to step S453 to perform charging for the next sub-charge amount. For example, if the target charge amount is 10KWh and multiple sub-charge amounts are each 2KWh, after charging is completed for the first sub-charge amount of 2KWh, steps S453 to S459 described above are performed for the next sub-charge amount of 2KWh, and charging is performed, and steps S453 to S459 described above are sequentially performed for the next sub-charge amount of 2KWh.

[0078] Meanwhile, in the above-described step S455, if payment approval for the sub-charge amount is not successful, all charging processes are terminated.

[0079] For example, if the initial target charging amount is 12KWh and the charging amount that could be paid for with an unknown contract certificate was 9KWh, and the initial target charging amount is divided into multiple sub-charging amounts of 2KWh units, charging for up to the fourth sub-charging amount is automatically completed, and the charging process ends when payment approval fails in the payment approval step (S455) for the fifth sub-charging amount.

[0080] In the step S457 of the preferred embodiment of the present invention described so far, charging is performed in sub-charging units of a preset quantity or rate, and in another preferred embodiment of the present invention, charging can be performed by dividing the target charging amount and the remaining charging target amount at a fixed ratio.

[0081] For example, in another embodiment of the present invention, steps S453 to S460 described above may be sequentially performed by dividing the target charge amount by 50% and the remaining target charge amount by 50% in the same ratio in step S451.

[0082] In this case, step S453 requests the charging station (100) to approve payment of a charging fee for a sub-charging amount corresponding to 50% of the initial charging target amount, and if payment approval is successful, charging is performed for 50% of the initial charging target amount and then payment is made.

[0083] After that, a request is made to the charging station (100) for payment approval for the 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), and if payment approval is successful, charging is performed for 50% of the remaining target charge amount (25% of the initial target charge amount) and then payment is made. Then, the above-described process is repeated for the remaining target charge amount (25% of the initial target charge amount).

[0084]

[0085] The electric vehicle charging control method according to the preferred embodiment of the present invention described so far can be implemented as a computer program implemented as a computer-executable command and stored in a non-transitory storage medium.

[0086] Storage media include all types of recording devices that store data that can be read by a computer system. Examples of computer-readable storage media include ROM, RAM, CD-ROMs, 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.

[0087] The present invention has been described above, focusing on preferred embodiments thereof. Those skilled in the art will appreciate that the present invention can be implemented in modified forms without departing from its essential characteristics. Therefore, the disclosed embodiments should be considered illustrative rather than limiting. The scope of the present invention is set forth in the claims, not the foregoing description, and all differences within the scope equivalent thereto should be construed as being encompassed by the present invention.

Claims

1. A PnC-based electric vehicle charging control method performed in an electric vehicle charging control device including a memory and a processor for storing predetermined commands, (a) the processor requests payment authorization for the charging cost of the initial target charging amount from the charging station, and if payment authorization fails, divides the initial target charging amount into a plurality of sub-charges; (b) the step of the processor calculating the charging cost for the sub-charge amount and requesting payment approval from the charging station; and (c) If payment approval for the sub-charge amount is successful, the processor performs charging for the sub-charge amount and then pays the fee, and if the charging of the initial target charge amount is not completed, proceeds to step (b) and performs charging for the next sub-charge amount; A PnC-based electric vehicle charging control method characterized by comprising:

2. In paragraph 1, before step (a) When a charging station is connected to an electric vehicle, the processor transmits a contract certificate stored in the memory to the charging station to request validation of the contract certificate; and A PnC-based electric vehicle charging control method, characterized in that it further includes a step of: when the validity of the contract certificate is verified, the processor receives a charging rate table from the charging station and calculates a charging cost of the initial target charging amount according to the charging rate table.

3. In paragraph 1, A PnC-based electric vehicle charging control method, characterized in that the processor further includes a step of disconnecting the charger connector and terminating the charging process if payment approval for the sub-charge amount fails.

4. In paragraph 1, In the above step (a), the processor, Divide the initial target charge into multiple sub-charges in units of charge of a predefined quantity, or Divide the initial target charge into multiple sub-charges at a predefined ratio, or A PnC-based electric vehicle charging control method characterized in that the initial target charging amount is divided into multiple sub-charging amounts in units of charging amounts that can be charged for a predefined period of time.

5. In the first paragraph, in step (a) A PnC-based electric vehicle charging control method characterized in that the processor divides the initial target charging amount into a predefined ratio and repeatedly divides the remainder of the initial target charging amount into a plurality of sub-charging amounts by the predefined ratio.

6. In paragraph 1, A PnC-based electric vehicle charging control method, characterized in that the initial target charging amount is set by receiving input from a user terminal or is stored in advance in the memory.

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

8. An electric vehicle charging control device including a memory and a processor that store predetermined commands, The processor that executes the instructions stored in the memory (a) requesting payment authorization for the charging cost of the initial target charging amount from the charging station, and if payment authorization fails, dividing the initial target charging amount into multiple sub-charges; (b) a step of calculating the charging cost for the sub-charging amount and requesting payment approval from the charging station; and (c) If payment approval for the sub-charge amount is successful, a step of performing charging for the sub-charge amount and then paying the fee, checking whether charging of the initial target charge amount is completed, and if charging of the initial target charge amount is not completed, proceeding to step (b) and performing charging for the next sub-charge amount; A PnC-based electric vehicle charging control device characterized in that it performs the following steps.

9. In paragraph 8, The above processor, prior to step (a), When a charging station is connected to an electric vehicle, the processor transmits a contract certificate stored in the memory to the charging station to request validation of the contract certificate; and A PnC-based electric vehicle charging control device characterized in that, when the validity of the contract certificate is verified, the processor further performs the step of receiving a charging rate table from the charging station and calculating a charging cost of the initial target charging amount according to the charging rate table.

10. In the 8th paragraph, the processor A PnC-based electric vehicle charging control device characterized in that, if payment approval for the above sub-charge amount fails, a step of disconnecting the charger connector and terminating the charging process is further performed.

11. In paragraph 8, In step (a), the processor, Divide the initial target charge into multiple sub-charges in units of charge of a predefined quantity, or Divide the initial target charge into multiple sub-charges at a predefined ratio, or A PnC-based electric vehicle charging control device characterized in that the initial target charging amount is divided into a plurality of sub-charging amounts in units of charging amounts that can be charged for a predefined period of time.

12. In the 8th paragraph, in the step (a) A PnC-based electric vehicle charging control device characterized in that the processor divides the initial target charging amount into a predefined ratio and repeatedly divides the remainder of the initial target charging amount into a plurality of sub-charging amounts by the predefined ratio.

13. In paragraph 8, A PnC-based electric vehicle charging control device characterized in that the initial target charging amount is set by receiving input from a user terminal or is stored in advance in the memory.

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