Electric vehicle charging control method and system

Abstract

The present invention discloses a method and system for controlling charging of an electric vehicle, comprising: receiving a code scanning signal from a user's mobile terminal, controlling a charging pile to start charging according to the code scanning signal, and locking a charging gun corresponding to the charging pile; waking up the NFC module of the charging pile upon receiving a physical activation signal from a termination button of the charging gun, the NFC module being used to sense and match the feedback signal from the user's mobile terminal; controlling the charging pile to automatically stop charging if the feedback signal fails to match within a preset time; controlling the relay of the charging pile to cut off power if the feedback signal matches within a preset time, and controlling the charging gun to unlock and send a gun-pulling prompt to the user. The present invention starts charging by scanning a code with a mobile terminal, uses a physical termination button in combination with NFC authentication, and ensures that only authorized users can stop charging, thereby simplifying the operating process while effectively preventing misoperation. The NFC near-field authentication method also effectively reduces dependence on the network and improves reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging control, and in particular to an electric vehicle charging control method and system. Background Art

[0002] With the rapid development of the new energy vehicle industry, electric vehicle charging has become a high-frequency daily scene. The current mainstream charging station code scanning charging process is as follows:

[0003] 1) The user drives into the charging station and parks next to the charging pile;

[0004] 2) Manually remove the charging gun and insert it into the vehicle charging port;

[0005] 3) Start charging by scanning the QR code with your mobile phone;

[0006] 4) When charging is finished, you need to stop charging on the phone;

[0007] 5) Manually unlock the charging gun and return it to its original position.

[0008] The traditional charging station QR code scanning process requires multiple phone and physical operations at the start and end of charging, making the process cumbersome and time-consuming. If a network or charging station operator service anomalies occur when the user needs to stop, the user will waste even more time and experience a poor user experience. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide an electric vehicle charging control method and system to solve the pain points of traditional electric vehicle charging, such as the complex charging process and strong network dependence.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0011] A method for controlling charging of an electric vehicle comprises the following steps:

[0012] S1, receiving the user's mobile phone scanning signal and controlling the charging pile to start charging;

[0013] S2. When the user presses the physical stop button of the charging gun, the NFC module of the charging pile is awakened to sense the user's mobile phone and receive the sensing feedback signal;

[0014] S3. If the induction feedback signal is not received within the preset time, the charging pile is controlled to automatically disconnect charging, otherwise the next step is executed;

[0015] S4: Control the relay of the charging pile to cut off the power supply, and control the charging gun to unlock and send a reminder to the user to remove the gun.

[0016] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0017] An electric vehicle charging control system includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following steps are implemented:

[0018] S1, receiving the user's mobile phone scanning signal and controlling the charging pile to start charging;

[0019] S2. When the user presses the physical stop button of the charging gun, the NFC module of the charging pile is awakened to sense the user's mobile phone and receive the sensing feedback signal;

[0020] S3. If the induction feedback signal is not received within the preset time, the charging pile is controlled to automatically disconnect charging, otherwise the next step is executed;

[0021] S4: Control the relay of the charging pile to cut off the power supply, and control the charging gun to unlock and send a reminder to the user to remove the gun.

[0022] The beneficial effects of the present invention are: providing an electric vehicle charging control method and system, which starts charging by scanning the code with the user's mobile terminal, and uses a physical stop button in combination with the NFC module for NFC authentication, ensuring that only authorized users can stop charging, simplifying the operation process while effectively preventing misoperation. At the same time, the near-field NFC authentication method also effectively reduces the dependence on the network, improves the reliability of the charging pile system, and automatically stops charging when the corresponding NFC feedback signal is not matched within the preset time, ensuring charging safety. When the corresponding NFC feedback signal is matched, the entire charging power supply is cut off through the relay and then the charging gun is unlocked, ensuring the real-time and certainty of charging termination. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an overall flow chart of an electric vehicle charging control method according to an embodiment of the present invention;

[0024] Figure 2 This is a specific flow chart of an electric vehicle charging control method according to an embodiment of the present invention;

[0025] Figure 3 The figure is a schematic structural diagram of an electric vehicle charging control system according to an embodiment of the present invention.

[0026] Description of labels:

[0027] 1. An electric vehicle charging control system; 2. Memory; 3. Processor. DETAILED DESCRIPTION

[0028] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0029] Please refer to Figure 1 and Figure 2 , a method for controlling charging of an electric vehicle, comprising the steps of:

[0030] S1. Receive a code scanning signal from a user's mobile terminal, control the charging pile to start charging according to the code scanning signal, and lock the charging gun corresponding to the charging pile;

[0031] S2. When receiving a physical activation signal from the termination button of the charging gun, waking up the NFC module of the charging pile, wherein the NFC module is used to sense the feedback signal of the user's mobile terminal and perform matching;

[0032] S3. If the feedback signal fails to match within a preset time, the charging pile is controlled to automatically stop charging;

[0033] S4. If the feedback signal matches within the preset time, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and a gun-pulling prompt is sent to the user.

[0034] From the above description, it can be seen that the beneficial effects of the present invention are: charging is started by scanning the code through the user's mobile terminal, and NFC authentication is performed using a physical stop button in combination with the NFC module to ensure that only authorized users can stop charging, simplifying the operation process while effectively preventing misoperation. At the same time, the near-field NFC authentication method also effectively reduces dependence on the network, improves the reliability of the charging pile system, and automatically stops charging when the corresponding NFC feedback signal is not matched within the preset time, ensuring charging safety. When the corresponding NFC feedback signal is matched, the entire charging power supply is cut off through the relay and then the charging gun is unlocked to ensure the real-time and certainty of charging termination.

[0035] Furthermore, after receiving the scanning signal from the user's mobile terminal in step S1, the process further includes:

[0036] Binding the user mobile terminal to the charging pile to obtain binding information, wherein the binding information includes the ID information of the user mobile terminal;

[0037] In step S2, the NFC module senses the feedback signal from the user's mobile terminal and performs matching, specifically:

[0038] The user mobile terminal ID code carried in the feedback signal sensed by the NFC module is compared with the ID information in the binding information. If the comparison is consistent, the match is successful; otherwise, the match fails;

[0039] In step S2, the time interval between receiving the activation physical signal of the termination button of the charging gun and waking up the NFC module of the charging pile to sense the feedback signal of the user mobile terminal is less than a first preset threshold.

[0040] From the above description, it can be seen that by binding the user terminal ID information, the NFC module quickly compares the authentication information to achieve highly secure one-to-one matching, reducing the risk of illegal operation; at the same time, the time interval from button triggering to NFC wake-up is extremely short (less than the first preset threshold), ensuring a quick response from pressing the button to waking up the NFC module, and ensuring the real-time and deterministic control signal.

[0041] Furthermore, after the feedback signal matching in step S4 is passed, the method further includes:

[0042] S41. Generate a charging end signal, and transmit the charging end signal to the main control chip of the charging pile through a preset interrupt signal line. The preset interrupt signal line is a physical signal line between the signal feedback pin of the NFC module and the signal receiving pin of the main control chip.

[0043] From the above description, it can be seen that the wired signal transmission mechanism with a preset interrupt signal line is adopted to ensure the real-time and deterministic signal transmission, avoid the stability risks brought by wireless network dependence, and improve the reliability of the charging pile system.

[0044] Furthermore, in step S4, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and then a gun-pulling prompt is sent to the user, specifically:

[0045] S42: After receiving the charging end signal, the main control chip controls the relay coil of the charging pile to disconnect, and detects the collected coil level signal of the relay;

[0046] S43: If the coil level signal is 0, unlock the charging gun and detect the status of the charging gun in real time;

[0047] S44: If the charging gun is in an unlocked state, a gun-drawing prompt is sent to the user mobile terminal via the NFC module.

[0048] As can be seen from the above description, the main control chip directly controls the disconnection of the relay coil and detects the coil level signal to ensure the accuracy and reliability of the charging pile power cut-off. At the same time, after confirming that the relay coil level signal is 0 (i.e., disconnected state), the charging gun is unlocked and the charging gun status is detected in real time to ensure safe unlocking and status monitoring of the charging gun. Finally, after the charging gun is unlocked, a gun removal prompt is sent through the NFC module to optimize the user experience and ensure that the user removes the gun in time.

[0049] Furthermore, after controlling the charging pile to automatically stop charging in step S3, the method further includes:

[0050] An NFC authentication prompt is sent to the user mobile terminal, and after the NFC module of the charging pile senses the feedback signal from the user mobile terminal, the relay of the charging pile is controlled to cut off the power supply and the charging gun is controlled to unlock.

[0051] As can be seen from the above description, after automatically stopping charging, an NFC authentication prompt is sent to the user's mobile terminal to ensure that authentication can still be performed with user confirmation in special circumstances (such as NFC module failure), thereby increasing the flexibility and security of the charging pile system.

[0052] Please refer to Figure 3 , an electric vehicle charging control system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the following steps when executing the computer program:

[0053] S1. Receive a code scanning signal from a user's mobile terminal, control the charging pile to start charging according to the code scanning signal, and lock the charging gun corresponding to the charging pile;

[0054] S2. When receiving a physical activation signal from the termination button of the charging gun, waking up the NFC module of the charging pile, wherein the NFC module is used to sense the feedback signal of the user's mobile terminal and perform matching;

[0055] S3. If the feedback signal fails to match within a preset time, the charging pile is controlled to automatically stop charging;

[0056] S4. If the feedback signal matches within the preset time, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and a gun-pulling prompt is sent to the user.

[0057] From the above description, it can be seen that the beneficial effects of the present invention are: based on the same technical concept, in conjunction with the above-mentioned electric vehicle charging control method, an electric vehicle charging control system is provided, which starts charging by scanning the code through the user's mobile terminal, and uses a physical termination button in combination with the NFC module for NFC authentication to ensure that only authorized users can stop charging, simplifying the operation process while effectively preventing misoperation. At the same time, the near-field NFC authentication method also effectively reduces dependence on the network, improves the reliability of the charging pile system, and automatically stops charging when the corresponding NFC feedback signal is not matched within the preset time, ensuring charging safety. When the corresponding NFC feedback signal is matched, the entire charging power supply is cut off through the relay and then the charging gun is unlocked to ensure the real-time and certainty of charging termination.

[0058] Furthermore, after receiving the scanning signal from the user's mobile terminal in step S1, the process further includes:

[0059] Binding the user mobile terminal to the charging pile to obtain binding information, wherein the binding information includes the ID information of the user mobile terminal;

[0060] In step S2, the NFC module senses the feedback signal from the user's mobile terminal and performs matching, specifically:

[0061] The user mobile terminal ID code carried in the feedback signal sensed by the NFC module is compared with the ID information in the binding information. If the comparison is consistent, the match is successful; otherwise, the match fails;

[0062] In step S2, the time interval between receiving the activation physical signal of the termination button of the charging gun and waking up the NFC module of the charging pile to sense the feedback signal of the user mobile terminal is less than a first preset threshold.

[0063] From the above description, it can be seen that by binding the user terminal ID information, the NFC module quickly compares the authentication information to achieve highly secure one-to-one matching, reducing the risk of illegal operation; at the same time, the time interval from button triggering to NFC wake-up is extremely short (less than the first preset threshold), ensuring a quick response from pressing the button to waking up the NFC module, and ensuring the real-time and deterministic control signal.

[0064] Furthermore, after the feedback signal matching in step S4 is passed, the method further includes:

[0065] S41. Generate a charging end signal, and transmit the charging end signal to the main control chip of the charging pile through a preset interrupt signal line. The preset interrupt signal line is a physical signal line between the signal feedback pin of the NFC module and the signal receiving pin of the main control chip.

[0066] From the above description, it can be seen that the wired signal transmission mechanism with a preset interrupt signal line is adopted to ensure the real-time and deterministic signal transmission, avoid the stability risks brought by wireless network dependence, and improve the reliability of the charging pile system.

[0067] Furthermore, in step S4, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and then a gun-pulling prompt is sent to the user, specifically:

[0068] S42: After receiving the charging end signal, the main control chip controls the relay coil of the charging pile to disconnect, and detects the collected coil level signal of the relay;

[0069] S43: If the coil level signal is 0, unlock the charging gun and detect the status of the charging gun in real time;

[0070] S44: If the charging gun is in an unlocked state, a gun-drawing prompt is sent to the user mobile terminal via the NFC module.

[0071] As can be seen from the above description, the main control chip directly controls the disconnection of the relay coil and detects the coil level signal to ensure the accuracy and reliability of the charging pile power cut-off. At the same time, after confirming that the relay coil level signal is 0 (i.e., disconnected state), the charging gun is unlocked and the charging gun status is detected in real time to ensure safe unlocking and status monitoring of the charging gun. Finally, after the charging gun is unlocked, a gun removal prompt is sent through the NFC module to optimize the user experience and ensure that the user removes the gun in time.

[0072] Furthermore, after controlling the charging pile to automatically stop charging in step S3, the method further includes:

[0073] An NFC authentication prompt is sent to the user mobile terminal, and after the NFC module of the charging pile senses the feedback signal from the user mobile terminal, the relay of the charging pile is controlled to cut off the power supply and the charging gun is controlled to unlock.

[0074] As can be seen from the above description, after automatically stopping charging, an NFC authentication prompt is sent to the user's mobile terminal to ensure that authentication can still be performed with user confirmation in special circumstances (such as NFC module failure), thereby increasing the flexibility and security of the charging pile system.

[0075] The present invention provides an electric vehicle charging control method and system, which are applicable to scenarios where electric vehicles are charged at charging piles, and are described below with reference to specific embodiments.

[0076] Please refer to Figure 1 , embodiment 1 of the present invention is:

[0077] A charging control method for an electric vehicle, such as Figure 1 As shown, the steps include:

[0078] S1. Receive the code scanning signal from the user's mobile terminal, control the charging pile to start charging according to the code scanning signal, and lock the charging gun corresponding to the charging pile.

[0079] S2. When the physical activation signal of the termination button of the charging gun is received, the NFC module of the charging pile is awakened. The NFC module is used to sense the feedback signal of the user's mobile terminal and match it.

[0080] S3. If the feedback signal does not match within the preset time, the charging pile is controlled to automatically stop charging.

[0081] S4. If the feedback signal matches within the preset time, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and a reminder to the user to remove the gun is sent.

[0082] That is, in this embodiment, charging is started by scanning the code with the user's mobile terminal, and a physical stop button is used in combination with the NFC module for NFC authentication to ensure that only authorized users can stop charging, which simplifies the operation process and effectively prevents misoperation. At the same time, the near-field NFC authentication method also effectively reduces dependence on the network, improves the reliability of the charging pile system, and automatically stops charging when the corresponding NFC feedback signal is not matched within the preset time to ensure charging safety. When the corresponding NFC feedback signal is matched, the entire charging power supply is cut off through the relay and then the charging gun is unlocked to ensure the real-time and certainty of charging termination.

[0083] In addition, in this embodiment, after controlling the charging pile to automatically stop charging in step S3, the method further includes:

[0084] An NFC authentication prompt is sent to the user's mobile terminal, and after the NFC module of the charging pile senses the feedback signal from the user's mobile terminal, the relay of the charging pile is controlled to cut off the power supply and the charging gun is unlocked.

[0085] That is, after automatically stopping charging, an NFC authentication prompt is sent to the user's mobile terminal to ensure that authentication can still be performed through user confirmation in special circumstances (such as NFC module failure), increasing the flexibility and security of the charging pile system.

[0086] Please refer to Figure 2 , the second embodiment of the present invention is:

[0087] A method for controlling charging of an electric vehicle, based on the above-mentioned embodiment 1, in this embodiment, after receiving the code scanning signal from the user's mobile terminal in step S1, further includes:

[0088] Bind the user's mobile terminal to the charging pile to obtain binding information, which includes the ID information of the user's mobile terminal.

[0089] In step S2, the NFC module senses the feedback signal from the user's mobile terminal and performs matching, specifically:

[0090] The user's mobile terminal ID code carried in the feedback signal sensed by the NFC module is compared with the ID information in the binding information. If the comparison is consistent, the match is successful, otherwise the match fails.

[0091] At the same time, the time interval between receiving the activation physical signal of the termination button of the charging gun in step S2 and waking up the NFC module of the charging pile to sense the feedback signal of the user's mobile terminal is less than the first preset threshold. In this embodiment, the first preset threshold can be limited to 5ms.

[0092] That is, in this embodiment, by binding the user terminal ID information, the NFC module quickly compares the authentication information to achieve a highly secure one-to-one match, reducing the risk of illegal operation; at the same time, by setting the time interval to 5ms, the time interval from button triggering to NFC wake-up is extremely short (less than the first preset threshold, the traditional solution requires 20~100ms), ensuring a quick response from pressing the button to waking up the NFC module, and ensuring the real-time and deterministic nature of the control signal.

[0093] At the same time in this embodiment, Figure 2 As shown, the preset time in steps S3 and S4 can be limited to 2 seconds, that is, after receiving the feedback signal from the NFC module sensing the target user's mobile phone within 2 seconds and matching, step S4 is executed. In other equivalent embodiments, the preset time can also be limited according to actual needs. Since the sensing distance of the NFC module is usually within a few centimeters to more than ten centimeters, the time for the NFC module to sense the target user's mobile phone can be limited based on the sensing distance of the NFC module, ensuring that the judgment result and judgment efficiency will not be affected by the preset time being set too short or too long, and effectively approaching the single-step operation design of "press emergency stop", so that the user can directly cut off the power output of the charging pile by simply pressing the physical end button on the charging gun.

[0094] At the same time, Figure 2 As shown, after the feedback signal matches in step S4, the following steps are also included:

[0095] S41. Generate a charging end signal and transmit the charging end signal to the main control chip of the charging pile through a preset interrupt signal line. The preset interrupt signal line is a physical signal line between the signal feedback pin of the NFC module and the signal receiving pin of the main control chip.

[0096] That is, a wired signal transmission mechanism with a preset interrupt signal line is adopted to ensure the real-time and deterministic signal transmission, avoid the stability risks brought by wireless network dependence, and improve the reliability of the charging pile system.

[0097] In addition, in this embodiment, Figure 2 As shown, in step S4, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and then a reminder to the user to unplug the gun is sent. Specifically:

[0098] S42. After receiving the charging end signal, the main control chip controls the relay coil of the charging pile to disconnect and detects the collected relay coil level signal.

[0099] S43: If the coil level signal is 0, the charging gun is controlled to unlock and the status of the charging gun is detected in real time.

[0100] S44: If the charging gun is in unlocked state, a reminder to unload the gun is sent to the user's mobile terminal via the NFC module.

[0101] That is, the main control chip directly controls the disconnection of the relay coil and detects the coil level signal to ensure the accuracy and reliability of the charging pile power cut-off; at the same time, after confirming that the relay coil level signal is 0 (i.e., disconnected state), the charging gun is unlocked and the charging gun status is detected in real time to ensure the safe unlocking and status monitoring of the charging gun; finally, after the charging gun is unlocked, a gun-pulling reminder is sent through the NFC module to optimize the user experience and ensure that the user pulls out the gun in time.

[0102] Please refer to Figure 3 , the third embodiment of the present invention is:

[0103] An electric vehicle charging control system 1 includes a memory 2, a processor 3, and a computer program stored in the memory 2 and executable on the processor 3. When the processor 3 executes the computer program, the steps of an electric vehicle charging control method in the first or second embodiment are implemented.

[0104] In summary, the electric vehicle charging control method and system provided by the present invention have the following beneficial effects:

[0105] 1. Simplified operation process: With the "press to stop" single-step operation design, users only need to press the physical termination button on the charging gun to directly cut off the power output of the charging pile. At the same time, with the near-field authentication of the NFC module, it ensures that only authorized users can terminate charging by pressing the button, effectively preventing misoperation and eliminating the double operation steps of "mobile phone confirmation + charging pile unlocking" in the traditional process.

[0106] 2. Improved system reliability: A wired signal transmission mechanism that interrupts the signal line avoids the stability risks brought by wireless network dependence. At the same time, the hardware-level physical stop button takes 5ms from pressing to waking up the NFC module, ensuring a fast response of NFC authentication, thereby ensuring the real-time and deterministic control signal.

[0107] 3. User experience optimization: The number of operation steps is reduced, and the charging end process is simplified from multiple steps to a single press, while eliminating the uncertainty of users waiting for network response.

[0108] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling charging of an electric vehicle, characterized in that: Including steps: S1. Receive a code scanning signal from a user's mobile terminal, control the charging pile to start charging according to the code scanning signal, and lock the charging gun corresponding to the charging pile; S2. When receiving a physical activation signal from the termination button of the charging gun, waking up the NFC module of the charging pile, wherein the NFC module is used to sense the feedback signal of the user's mobile terminal and perform matching; S3. If the feedback signal fails to match within a preset time, the charging pile is controlled to automatically stop charging; After controlling the charging pile to automatically stop charging in step S3, the method further includes: Sending an NFC authentication prompt to the user's mobile terminal, and controlling the relay of the charging pile to cut off the power supply and unlock the charging gun after the NFC module of the charging pile senses the feedback signal from the user's mobile terminal; S4. If the feedback signal matches within the preset time, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and a reminder to the user to unplug the gun is sent; After the feedback signal matching in step S4 is passed, the method further includes: S41: Generate a charging end signal, and transmit the charging end signal to the main control chip of the charging pile through a preset interrupt signal line, where the preset interrupt signal line is a physical signal line between the signal feedback pin of the NFC module and the signal receiving pin of the main control chip; In step S4, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and then a reminder to the user to unplug the gun is sent. Specifically, S42: After receiving the charging end signal, the main control chip controls the relay coil of the charging pile to disconnect, and detects the collected coil level signal of the relay; S43: If the coil level signal is 0, unlock the charging gun and detect the status of the charging gun in real time; S44: If the charging gun is in an unlocked state, a gun-drawing prompt is sent to the user mobile terminal via the NFC module.

2. The electric vehicle charging control method according to claim 1, characterized in that: After receiving the code scanning signal from the user's mobile terminal in step S1, the method further includes: Binding the user mobile terminal to the charging pile to obtain binding information, wherein the binding information includes the ID information of the user mobile terminal; In step S2, the NFC module senses the feedback signal from the user's mobile terminal and performs matching, specifically: The user mobile terminal ID code carried in the feedback signal sensed by the NFC module is compared with the ID information in the binding information. If the comparison is consistent, the match is successful; otherwise, the match fails; In step S2, the time interval between receiving the activation physical signal of the termination button of the charging gun and waking up the NFC module of the charging pile to sense the feedback signal of the user mobile terminal is less than a first preset threshold.

3. An electric vehicle charging control system, characterized in that: The invention comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the following steps are implemented: S1. Receive a code scanning signal from a user's mobile terminal, control the charging pile to start charging according to the code scanning signal, and lock the charging gun corresponding to the charging pile; S2. When receiving a physical activation signal from the termination button of the charging gun, waking up the NFC module of the charging pile, wherein the NFC module is used to sense the feedback signal of the user's mobile terminal and perform matching; S3. If the feedback signal fails to match within a preset time, the charging pile is controlled to automatically stop charging; After controlling the charging pile to automatically stop charging in step S3, the method further includes: Sending an NFC authentication prompt to the user's mobile terminal, and controlling the relay of the charging pile to cut off the power supply and unlock the charging gun after the NFC module of the charging pile senses the feedback signal from the user's mobile terminal; S4. If the feedback signal matches within the preset time, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and a reminder to the user to unplug the gun is sent; After the feedback signal matching in step S4 is passed, the method further includes: S41: Generate a charging end signal, and transmit the charging end signal to the main control chip of the charging pile through a preset interrupt signal line, where the preset interrupt signal line is a physical signal line between the signal feedback pin of the NFC module and the signal receiving pin of the main control chip; In step S4, the relay of the charging pile is controlled to cut off the power supply, and the charging gun is controlled to be unlocked and then a reminder to the user to unplug the gun is sent. Specifically, S42: After receiving the charging end signal, the main control chip controls the relay coil of the charging pile to disconnect, and detects the collected coil level signal of the relay; S43: If the coil level signal is 0, unlock the charging gun and detect the status of the charging gun in real time; S44: If the charging gun is in an unlocked state, a gun-drawing prompt is sent to the user mobile terminal via the NFC module.

4. An electric vehicle charging control system according to claim 3, characterized in that: After receiving the code scanning signal from the user's mobile terminal in step S1, the method further includes: Binding the user mobile terminal to the charging pile to obtain binding information, wherein the binding information includes the ID information of the user mobile terminal; In step S2, the NFC module senses the feedback signal from the user's mobile terminal and performs matching, specifically: The user mobile terminal ID code carried in the feedback signal sensed by the NFC module is compared with the ID information in the binding information. If the comparison is consistent, the match is successful; otherwise, the match fails; In step S2, the time interval between receiving the activation physical signal of the termination button of the charging gun and waking up the NFC module of the charging pile to sense the feedback signal of the user mobile terminal is less than a first preset threshold.

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