Electric vehicle charging control device and method based on PNC

Abstract

The invention discloses an electric vehicle charging control device and method based on PnC. According to the PnC-based electric vehicle charging control device and method, although the validity of a contract certificate passes authentication, under the condition that payment authorization fails in a payment authorization process executed before actual charging and fee payment, the initial target charging amount is divided into a plurality of sub-charging amounts; charging and amount payment are sequentially performed for each sub-charging amount, so that charging can be performed to an amount that can be automatically paid even when the charging amount and the charging amount that can be paid by the user cannot be confirmed.

Description

Technical Field

[0001] This invention relates to an electric vehicle charging control device and method, and more specifically, to an electric vehicle charging control device and method based on PnC (plug and charge). Background Technology

[0002] Recently, with the accelerated popularization of electric vehicles, issues related to electric vehicle charging have become increasingly prominent, one of which is the issue of payment for charging.

[0003] Electric vehicles begin charging after a predetermined authorization process. Representative authorization methods include Plug and Charge (PnC) and external payment methods. PnC automatically completes authorization and payment using a contract certificate stored in the vehicle. External payment methods utilize external identification tools such as the vehicle user's credit card or RFID, with the charger performing identification, authorization, and payment.

[0004] Among them, the recently much-discussed PnC method requires no additional action from the user for charging payment; it is an automatic authorization method that automatically identifies the user and authorizes charging. Specifically, the plug-and-charge method refers to a method that automatically authenticates the user and initiates charging when the charging plug is inserted between the electric vehicle and the charging station.

[0005] The ISO 15118 standard, serving as the foundation for plug-and-charge technology, specifies authentication based on Public Key Infrastructure (PKI). According to the ISO 15118 standard, electric vehicles must be equipped with a contract certificate generated from an MO root certificate (MO RootCA cert.) issued by the MO root certificate authority (MO RootCA) within the charging operator (MO; mobility operator) system. Charging stations must be equipped with a charging station certificate (SECC cert.) generated from a V2G root certificate (V2G RootCA cert.) issued by the V2G root certificate authority (V2G RootCA).

[0006] During the authentication and payment authorization process, the charging station receives and verifies the contract certificate chain from the electric vehicle to confirm whether it is a vehicle with a valid charging contract and then executes the payment process.

[0007] However, in the past, with the PnC charging payment method, only the validity of the contract certificate associated with the payment tool (credit card, bank account, etc.) needed to be verified before charging began. Once the validity of the contract certificate was verified, the system would start charging directly without verifying payment ability. After charging was completed, the system would request payment for the charging fee from the payment tool (credit card, bank account, etc.) associated with the contract certificate.

[0008] In this situation, if the credit card limit associated with the contract certificate is exceeded or the bank account balance is insufficient, the actual payment cannot be executed. Ultimately, the charging process may be completed, but payment cannot be made.

[0009] Furthermore, according to the current ISO 15118 standard for PnC charging, even if the amount of electricity to be charged is entered and it is confirmed whether the amount can be paid before the charging power is transmitted, it is only possible to confirm whether the payment can be made, but it is impossible to obtain relevant information such as how much electricity or how much money can be paid.

[0010] Therefore, from the user's perspective, there is a problem of repeatedly performing tedious operations. If a notification is received that the specified amount of electricity cannot be paid, the user needs to re-enter other amounts of electricity and confirm whether the payment can be settled. In this case, if another notification of non-payment is received, the user needs to enter other amounts of electricity and confirm whether the payment can be settled again. Summary of the Invention

[0011] (The problem to be solved)

[0012] The problem to be solved by the present invention is to provide a PNC-based electric vehicle charging control device and method, which can automatically charge the electric vehicle to the amount payable by the payment instrument associated with the contract certificate when charging the electric vehicle according to the PnC charging method.

[0013] (Solutions)

[0014] A preferred embodiment of the electric vehicle charging control method based on PnC, for solving the above-mentioned technical problems, is executed by an electric vehicle charging control device including a memory storing predetermined instructions and a processor, comprising: (a) a step in which the processor requests payment authorization for charging fees for an initial target charging amount from a charging station; if payment authorization fails, the initial target charging amount is split into multiple sub-charging amounts; (b) a step in which the processor calculates the charging fees for the sub-charging amounts and requests payment authorization from the charging station; (c) a step in which, if payment authorization for the sub-charging amounts is successful, the processor performs charging and payment for the sub-charging amounts and confirms whether the charging of the initial target charging amount is completed; if the charging of the initial target charging amount is not completed, step (b) is performed to perform charging for the next sub-charging amount.

[0015] In addition, according to another preferred embodiment of the electric vehicle charging control method based on PnC, before step (a), the method may further include the following steps: if the electric vehicle is connected to a charging station, the processor sends a contract certificate stored in the memory to the charging station to request authentication of the validity of the contract certificate; if the validity of the contract certificate is authenticated, the processor receives a charging price list from the charging station and calculates the charging cost of the initial target charging amount according to the charging price list.

[0016] In addition, according to another preferred embodiment of the electric vehicle charging control method based on PnC according to the present invention, it may further include the following steps: if the payment authorization for the sub-charge amount fails, the processor disconnects the charger connector and terminates the charging process.

[0017] Additionally, in step (a), the processor is capable of dividing the initial target charge into multiple sub-charges in a predefined quantitative charge unit, or dividing the initial target charge into multiple sub-charges according to a predefined ratio, or dividing the initial target charge into multiple sub-charges in a predefined charge unit that can be charged within a predefined time.

[0018] Additionally, in step (a), the processor is configured to split the initial target charge amount into multiple sub-charge amounts by repeatedly splitting the remaining portion of the initial target charge amount into multiple sub-charge amounts by splitting it ...

[0019] In addition, the initial target charge amount can be set by receiving it from the user terminal or pre-stored in the memory.

[0020] On the other hand, a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention, used to solve the above-mentioned technical problems, includes a memory storing predetermined instructions and a processor. The processor, executing the instructions stored in the memory, performs the following steps: (a) requesting payment authorization from a charging station for a charging fee for an initial target charging amount; if the payment authorization fails, the initial target charging amount is divided into multiple sub-charging amounts; (b) the processor calculates the charging fee for each sub-charging amount and requests payment authorization from the charging station; (c) if the payment authorization for each sub-charging amount is successful, the processor performs payment for the sub-charging amount after charging and confirms whether the initial target charging amount has been completed. If the initial target charging amount has not been completed, step (b) is performed to charge the next sub-charging amount.

[0021] Additionally, prior to step (a), the processor may also perform the following steps: if the electric vehicle is connected to a charging station, the processor sends a contract certificate stored in the memory to the charging station and requests authentication of the validity of the contract certificate; if the validity of the contract certificate is authenticated, the processor receives a charging price list from the charging station and calculates the charging cost for the initial target charging amount based on the charging price list.

[0022] Additionally, the processor may also perform the following steps: if payment authorization for the sub-charge amount fails, disconnect the charger connector and terminate the charging process.

[0023] Additionally, in step (a), the processor is capable of dividing the initial target charge into multiple sub-charges in a predefined quantitative charge unit, or dividing the initial target charge into multiple sub-charges according to a predefined ratio, or dividing the initial target charge into multiple sub-charges in a predefined charge unit that can be charged within a predefined time.

[0024] Additionally, in step (a), the processor is configured to split the initial target charge amount into multiple sub-charge amounts by repeatedly splitting the remaining portion of the initial target charge amount into multiple sub-charge amounts by splitting it ...

[0025] In addition, the initial target charge amount can be set by receiving it from the user terminal or pre-stored in the memory.

[0026] (The effect of the invention)

[0027] The electric vehicle charging control device and method based on PNC according to a preferred embodiment of the present invention, which is used to solve the above-mentioned problems, is as follows: when the validity of the contract certificate is certified, but the payment authorization fails during the payment authorization process before actual charging and payment, the initial target charging amount is divided into multiple sub-charging amounts, and charging and payment are performed sequentially for each sub-charging amount. Thus, even when the charging amount and charging amount that the user can pay cannot be confirmed, the charging can be automatically charged to the payable amount. Attached Figure Description

[0028] Figure 1a and Figure 1b It is a diagram illustrating the charging process according to the ISO 15118-2 standard.

[0029] Figure 2 This is a diagram illustrating the overall connection structure of a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention.

[0030] Figure 3 This is a block diagram illustrating the specific structure of a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention.

[0031] Figure 4 This is a diagram illustrating the overall flow of a PnC-based electric vehicle charging control method according to a preferred embodiment of the present invention. Detailed Implementation

[0032] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0033] The above-described objects, features, and advantages of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings. However, the present invention is open to various modifications and may have various embodiments; specific embodiments will be illustrated and described in detail below with reference to the accompanying drawings.

[0034] Throughout this specification, the same reference numerals generally denote the same components. Furthermore, the same reference numerals are used to describe components that function within the same conceptual scope shown in the accompanying drawings of various embodiments.

[0035] When a component is "included" in a part of the instruction manual, this means that other components are not excluded unless specifically opposed by the specification. Furthermore, the terms "...part," "module," etc., used in the instruction manual refer to a unit that performs at least one function or action, which can be implemented in hardware or software, or a combination of both.

[0036] Where a detailed description of a known function or structure related to the present invention is deemed unnecessary to obscure the spirit of the invention, such detailed description will be omitted. Furthermore, the numbers used in the description of this specification (e.g., first, second, etc.) are merely identification marks used to distinguish one component from another.

[0037] The electric vehicle charging control device and method according to a preferred embodiment of the present invention described below exemplify that it complies with the Plug and Charge (PnC) protocol specified in the ISO 15118-2 standard.

[0038] Except for the features and structures of the present invention as explicitly described below, the overall charging process and charging payment process are the same as those applicable to the above-mentioned ISO 15118-2 standard.

[0039] First, refer to the charging payment process described in the ISO 15118-2 standard above. Figure 1a and Figure 1bThis describes the charging and payment process according to the ISO 15118-2 standard. The charging station (SECC, or Power Supply Equipment Communication Controller) and the charging control device (EVCC, or Electric Vehicle Communication Controller) execute a support application protocol step S10 and a session establishment step S20. The support application protocol step S10 involves the EVCC and SECC exchanging information to set up the application layer protocol. The session establishment step S20 involves the EVCC sending a request message to establish a V2G communication session. The SECC responds to this message to indicate whether a new communication session or a previous communication session was successfully joined, thereby establishing a communication channel between the charger (SECC) and the charging control device (EVCC).

[0040] Next, the service discovery step S30 and the service details step S40 are executed. The service discovery step S30 involves the EVCC requesting the SECC to detect all services provided by the SECC, and the SECC responds with the available services, such as AC charging, DC charging, EIM mode, plug-and-charge mode, etc. The service details step S40 involves the EVCC requesting specific additional information from the SECC, and the SECC provides the detailed parameter information.

[0041] The process sequentially executes the payment service selection step S50, certificate installation step S60, certificate update step S70, payment details step S80, and authorization step S100. The payment service selection step S50 involves the EVCC requesting a payment method (EIM / Plug and Play) for the service provided by the SECC, and the SECC responds with its acceptance or rejection of the selected service and payment method. The certificate installation step S60 involves requesting the SECC to install a certificate if the EVCC does not have a contract certificate installed, and then installing the requested contract certificate. The certificate update step S70 involves the EVCC having a contract certificate that is about to expire. In the case of the same certificate, a request is made to update the contract certificate; in the payment details step S80, when the payment method is contract-based charging (plug and play), the EVCC sends the contract certificate chain and EMAID to the SECC to request a challenge. If the SECC verifies that the EMAID and contract certificate chain are trustworthy, it responds to the challenge with a 128-bit random number; in the authorization step S100, the EVCC uses the private key of the contract certificate to sign the request information subject including the challenge. The SECC verifies the signature and checks whether it is consistent with the previously sent challenge and responds whether to authorize charging.

[0042] Next, in the charging parameter discovery step S110, the EVCC and SECC exchange the maximum and minimum permissible voltage levels and current quantities to mutually exchange technical charging limits. The EVCC informs the SECC of the charging capacity and target departure time, and the SECC submits a charging plan to the EVCC. Here, the charging plan includes the maximum chargeable electricity and selective electricity sales price during the electric vehicle's connection to the charging station.

[0043] Next, the cable inspection step S120, the pre-charging step S130, and the power transmission step S140 are executed. The cable inspection step S120 performs a cable inspection for safe charging. The pre-charging step S130 adjusts the output voltage of the charging station to the battery voltage of the electric vehicle. The power transmission step S140 involves the EVCC sending a power transmission request to the SECC, requesting power supply, and sending the charging configuration file that the EVCC should follow during the charging process. The SECC, upon receiving the power transmission request information, sends a power transmission response message to the EVCC, including information on whether power is available.

[0044] Then, the current request step is executed, thereby realizing the charging cycle S150. The current request step is that the electric vehicle requests a specific current from the charging station by sending a current demand request, and the SECC sends a current demand response to the EVCC to inform the electric vehicle of the status of the charging station and the current output voltage and current.

[0045] Finally, the session termination step (S170) is executed, thereby ending the charging process according to the PnC protocol.

[0046] The charging control method according to the preferred embodiment of the present invention described below is implemented based on the aforementioned ISO 15118-2 standard. Details not specifically described herein are consistent with those in the present invention. Figure 1a and Figure 1b The content shown is the same as that specified in the ISO 15118-2 standard.

[0047] Figure 2 This is a diagram illustrating the overall connection structure of a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention; Figure 3 This is a block diagram illustrating the specific structure of a PnC-based electric vehicle charging control device according to a preferred embodiment of the present invention.

[0048] Reference Figure 2 and Figure 3 According to a preferred embodiment of the present invention, the PnC-based electric vehicle charging control device 310 is installed inside the electric vehicle and connected to the charging station 100 via a connector 200. It controls the supply of charging power from the charging station 100 to the electric vehicle 300 and performs payment for the charging power.

[0049] 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, and receives the amount of electricity to be charged from the user and sends it to the charging station.

[0050] In addition, the charging control device 310 connects to the user's mobile communication terminal 400b via a short-range communication network such as Bluetooth or a mobile communication network, sends charging-related information to the mobile communication terminal 400b and displays it to the user, and receives the amount of electricity to be charged input by the user from the mobile communication terminal 400b and sends it to the charging station.

[0051] In addition, in a modified embodiment of the present invention, the mobile communication terminal 400b can also be directly connected to the charging station via a wireless communication network to send the amount of electricity to be charged.

[0052] For ease of explanation, the structures that display information to the user and receive user input information, regardless of their installation location or implementation method, will be collectively referred to as user terminals 400a and 400b. The AVN controller 400a and mobile communication terminal 400b mentioned above are also included in user terminals 400a and 400b.

[0053] The charging station 100 is connected to the charging circuit (not shown) and charging control device 310 of the electric vehicle 300 via connector 200. The charging circuit supplies charging power to the battery 340 to charge the high-voltage battery 340. In addition to exchanging charging-related information with the charging control device 310, it also exchanges charging amount payment information with the charging control device 310 to perform charging amount payment in a plug-and-charge manner.

[0054] The user, as the driver of the electric vehicle performing the charging, enters into a PnC-related service usage agreement with the charging station operator (CPO), mobility operator (MO), or electric vehicle mobility service provider (eMSP), and installs the contract certificate on the electric vehicle during the first charge. Afterwards, the user can select the PnC service and pay for the charging at the charging station associated with that CPO, MO, or eMSP.

[0055] Also refer to Figure 3 The electric vehicle includes a charging control device 310, an OBC 320, a BMS 330, and a high-voltage battery 340, and may also include an AVN controller 400a.

[0056] The OBC (On-Board Charger) 320 converts the AC power input from the charging station 100 into DC power through the connector 200 to charge the battery 340. The BMS (Battery Management System) 330 controls the entire charging process in the electric vehicle.

[0057] The AVN controller 400a performs the functions of outputting various information to the user and receiving information from the user. In this invention, the AVN controller 400a displays charging-related information to the user and receives charging power from the user to output to the charging control device 310.

[0058] The charging control device 310 installed in the vehicle includes a processor 311 and a memory 313. According to a preferred embodiment of the present invention, the memory 313 can store instructions executable by the processor 311 and programs executed by the processor 311, and can also store input / output data. For example, the memory 313 can be an SSD (Solid State Drive), flash memory, ROM (Read-Only Memory), RAM (Random Access Memory), etc.

[0059] According to a preferred embodiment of the present invention, the processor 311 may be implemented by a CPU (Central Processing Unit) or a similar device (e.g., MPU (Microprocessor), MCU (Microcontroller Unit), etc.), and executes instructions stored in memory 313, thereby performing the reference... Figure 4 In the subsequent steps of the charging control method, the EVCC (Electric Vehicle Communication Controller) function is executed during the PnC payment, thereby enabling communication with the SECC (Power Supply Equipment Communication Controller) installed in the charging station 100.

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

[0061] The specific functions of the charging control device 310 of the present invention will be explained by referring to... Figure 4 A more detailed explanation will follow.

[0062] Figure 4 This is a diagram illustrating the overall flow of a PnC-based electric vehicle charging control method according to a preferred embodiment of the present invention.

[0063] Also refer to Figure 4 This indicates that in Figure 2 and Figure 3 The electric vehicle charging control method based on PnC, implemented by the electric vehicle charging control device 310 shown, operates when the user has pre-signed a PnC-related service agreement with the charging station operator (CPO), mobility operator (MO), or electric vehicle mobility service provider (eMSP) and the contract certificate is stored in the charging control device 310. If the charger connector 200 of the charging station 100 is connected to the electric vehicle 300, the following steps are executed: Figure 1a From steps S10 to S100, the PnC charging process is initiated, and the contract certificate stored in the memory 313 is transmitted to the charging station 100. The charging station 100 verifies the validity of the contract certificate. If the validity verification of the contract certificate fails, the charging process S410 ends.

[0064] If the validity of the contract certificate is verified, the processor 311 receives the initial target charging amount from the user terminals 400a and 400b (S421). As described above, the processor 311 can receive charging amount from the user terminals 400a and 400b through the AVN controller 400a, and can also receive charging amount through the application (APP) installed on the user terminals 400a and 400b, and sets the charging amount input by the user as the target charging amount (hereinafter referred to as "target charging amount"). At this time, the user can also directly input the target charging amount in kWh units. If the user inputs the target charging amount in monetary units, it can be converted into kWh of electricity. If the user inputs the charging time, it can also be converted into the target charging amount in kWh units that can be charged within that time.

[0065] If a default charging level (e.g., charging to 80% of full capacity) is preset and stored in memory 313, processor 311 can set the required charging level to reach the default value stored in memory 313 as the target charging level, instead of receiving the charging level through user terminals 400a and 400b. For example, if the current charging level is 20% and the default value is 80%, then the target charging level is the amount of power used to charge to 60%.

[0066] exist Figure 4 The example shown illustrates that after verifying the validity of the contract certificate, the processor 311 receives the initial target charging amount from the user terminals 400a and 400b. However, it should be noted that in another embodiment of the present invention, the validity of the contract certificate can also be verified if the charging control device 310 receives the initial target charging amount from the user terminals 400a and 400b, stores it in the memory 313, and then connects to the charger connector 200.

[0067] The processor 311 sends the initial target charging amount input by the user to the charging station 100 and receives the charging plan from the charging station 100 (S423). At this time, the charging plan includes a charging price list.

[0068] The processor 311, which receives the charging price list from the charging station 100, calculates the estimated total charging cost for the initial target charging amount based on the received charging price list (S425).

[0069] Then, the processor 311 requests payment authorization from the charging station 100 for the estimated total charging cost (S427).

[0070] If the payment authorization at charging station 100 is successful (S430), then processor 311 will... Figure 1bStep S120 is shown and begins execution, performing the conventional PnC-based charging process (S441).

[0071] If the normal charging process is completed, payment is made for the charging amount corresponding to the actual charging performed, and the user disconnects the charger connector 200 from the electric vehicle 300, thus ending the entire charging process (S443).

[0072] On the other hand, in step S430, if the payment authorization for the initial target charging amount by the charging station 100 fails, the processor 311 splits the initial target charging amount into multiple sub-charging amounts (S451), calculates the estimated charging cost for the first sub-charging amount, and then requests payment authorization from the charging station 100 (S453).

[0073] 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 a fixed amount of charge (e.g., 1 kWh, 5 kWh, 10 kWh, etc.). The initial target charge amount can be divided into a predefined percentage (%) of charge amount (e.g., 10%, 20%, etc. of the target charge amount). The initial target charge amount can be divided into a charge amount that can be charged within a pre-set time (e.g., 1 minute, 5 minutes, 10 minutes, etc.). In step S451, the user terminals 400a and 400b can also pre-set the division method and a default value.

[0074] In step S453, if payment authorization for the sub-charge amount is successful (S455), then processor 311, for the sub-charge amount that has been authorized through payment, from... Figure 1b The step shown in S110 begins the execution of the regular PnC-based charging process (S457) and makes payment for the charging amount for the sub-charging quantity (S459).

[0075] Then, it is confirmed whether the initial target charge has been fully charged (i.e., whether there is any remaining sub-charge) (S460). If the target charge has been fully charged, the charging connector 200 is disconnected from the electric vehicle 300, and the charging process ends.

[0076] If, in step S460, the result confirms that there are still sub-charge amounts that have not been fully charged, then step S453 is performed to charge the next sub-charge amount. For example, if the target charge amount is 10 kWh and the multiple sub-charge amounts are each 2 kWh, then after the first sub-charge amount of 2 kWh is fully charged, steps S453 to S459 are performed on the next sub-charge amount of 2 kWh to charge it. Then, steps S453 to S459 are performed sequentially on each subsequent sub-charge amount of 2 kWh.

[0077] On the other hand, in step S455 above, if the payment authorization for the sub-charge amount is unsuccessful, the entire charging process ends.

[0078] For example, if the initial target charging amount is 12 kWh and the charging amount payable with an unknown contract certificate is 9 kWh, then when the initial target charging amount is split into multiple sub-charging amounts of 2 kWh units, the charging of the first four sub-charging amounts is automatically completed, while the payment authorization fails in the payment authorization step (S455) of the fifth sub-charging amount, thus ending the charging process.

[0079] In step S457 of the preferred embodiment of the present invention described above, charging was performed using a pre-set quantitative or fixed proportion of sub-charging units. However, in another preferred embodiment of the present invention, charging may be performed by splitting the target charging amount and the remaining target charging amount into a predetermined proportion.

[0080] For example, in another embodiment of the present invention, in step S451, the target charge amount is divided into 50% and the remaining target charge amount in equal proportions, and steps S453 to S460 described above can be executed sequentially.

[0081] In this case, step S453 is to request a charging amount payment authorization from the charging station 100 for the sub-charging amount corresponding to 50% of the initial charging target amount. If the payment authorization is successful, the amount payment is performed after charging for 50% of the initial charging target amount.

[0082] Next, for the sub-charge amount (25% of the initial target charge amount) that is equivalent to 50% of the remaining target charge amount (50% of the initial target charge amount), a charging fee payment authorization is requested from charging station 100. If the payment authorization is successful, charging is performed on the remaining 50% of the target charge amount (25% of the initial target charge amount), and then the payment is executed. Then, the above process is repeated for the remaining target charge amount (25% of the initial target charge amount).

[0083] The electric vehicle charging control method of the preferred embodiment of the present invention described above can be implemented by computer-executable instructions and can be implemented by a computer program stored in a non-volatile storage medium.

[0084] Storage media include all recording devices capable of storing computer-readable data. For example, computer-readable storage media include ROM, RAM, CD-ROM, optical data storage devices, etc. Furthermore, computer-readable storage media can be distributed across networked computer systems to store and execute computer-readable code in a distributed manner.

[0085] The present invention has now been described with reference to preferred embodiments. Those skilled in the art will understand that the invention can be implemented in modified forms without departing from its essential characteristics. Therefore, the disclosed embodiments should be considered from an illustrative rather than a limiting perspective. The scope of the invention is set forth in the claims, not in the foregoing description, and all distinctions equivalent to that scope should be interpreted as being included within the scope of the invention.

Claims

1. A PnC-based electric vehicle charging control method, performed by an electric vehicle charging control device including a memory storing predetermined instructions and a processor, comprising: (a) a step in which the processor requests a charging station for payment authorization of a charging fee for an initial target charging amount, and if the payment authorization fails, splits the initial target charging amount into a plurality of sub-charging amounts; (b) a step in which the processor calculates a charging fee for a sub-charging amount, and requests the charging station for payment authorization; (c) a step in which, if the payment authorization for the sub-charging amount is successful, the processor performs charging for the sub-charging amount, and confirms whether charging for the initial target charging amount is completed, and if charging for the initial target charging amount is not completed, proceeds to the (b) step to perform charging for a next sub-charging amount.

2. The PnC-based electric vehicle charging control method according to claim 1, characterized in that, before the (a) step, further comprising the steps of: if an electric vehicle is connected to a charging station, the processor sends a contract certificate stored in the memory to the charging station, and requests authentication of validity of the contract certificate; if the validity of the contract certificate is authenticated, the processor receives a charging price table from the charging station, and calculates a charging fee for the initial target charging amount based on the charging price table. further comprising the step of:

3. The PnC based electric vehicle charging control method as claimed in claim 1, wherein, if the payment authorization for the sub-charging amount fails, the processor disconnects a charger connector, and ends the charging process.

4. The PnC-based electric vehicle charging control method according to claim 1, characterized in that, in the (a) step, the processor: splits the initial target charging amount into a plurality of sub-charging amounts in a predefined quantitative charging amount unit, or splits the initial target charging amount into a plurality of sub-charging amounts in a predefined ratio, or splits the initial target charging amount into a plurality of sub-charging amounts in a predefined time-charging amount unit.

5. The PnC-based electric vehicle charging control method according to claim 1, characterized in that, in the (a) step, the processor: splits the initial target charging amount into a plurality of sub-charging amounts in a predefined ratio, and repeatedly splits a remaining part of the initial target charging amount in the predefined ratio.

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

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

8. A PnC-based electric vehicle charging control device including a memory storing predetermined instructions and a processor, the processor executing the instructions stored in the memory to perform: ​ ​ ​ ​ (a) step, requesting payment authorization for charging fees for the initial target charging amount from the charging station, and if the payment authorization fails, splitting the initial target charging amount into a plurality of sub-charging amounts; (b) step, the processor calculates charging fees for the sub-charging amounts to request payment authorization from the charging station; (c) step, if the payment authorization for the sub-charging amount is successful, the processor performs charging after payment for the sub-charging amount, and confirms whether the charging of the initial target charging amount is completed, and if the charging of the initial target charging amount is not completed, performs the (b) step for the next sub-charging amount.

9. The PnC-based electric vehicle charging control device according to claim 8, wherein, before the (a) step, the processor further performs the following steps: If the electric vehicle is connected to the charging station, the processor sends the contract certificate stored in the memory to the charging station to request authentication of the validity of the contract certificate; If the validity of the contract certificate is authenticated, the processor receives a charging price table from the charging station, and calculates the charging fees for the initial target charging amount according to the charging price table.

10. The PnC-based electric vehicle charging control device according to claim 8, wherein, the processor further performs the following steps: If the payment authorization for the sub-charging amount fails, the charger connector is disconnected and the charging process is ended.

11. The PnC-based electric vehicle charging control device according to claim 8, wherein, in the (a) step, the processor is: splitting the initial target charging amount into a plurality of sub-charging amounts in a predefined quantitative charging amount unit, or splitting the initial target charging amount into a plurality of sub-charging amounts in a predefined ratio, or splitting the initial target charging amount into a plurality of sub-charging amounts in a predefined chargeable charging amount unit within a predefined time.

12. The PnC-based electric vehicle charging control device according to claim 8, wherein, in the (a) step, the processor is: splitting the initial target charging amount into a plurality of sub-charging amounts in a predefined ratio, and repeatedly splitting the remaining part of the initial target charging amount in the predefined ratio to further split the initial target charging amount into a plurality of sub-charging amounts.

13. The PnC-based electric vehicle charging control device according to claim 8, wherein, the initial target charging amount is set from the user terminal or is pre-stored in the memory. ​ ​ ​

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