New energy automobile intelligent charging control system

Abstract

The invention discloses a new energy automobile intelligent charging control system which comprises power supply equipment, a vehicle-mounted charger, a vehicle control unit, a display instrument panel, a power battery and a fault feedback terminal, a charging management system comprises a data acquisition module, a data analysis module and a data feedback module, and the invention relates to the technical field of automobile charging. According to the intelligent charging control system for the new energy automobile, charging operation is monitored and analyzed through a charging management system in the whole automobile controller, information of charging operation equipment is collected through a data collection module, and after information analysis, the fault of charging outage is analyzed in time, and specific reasons are found; according to the new energy vehicle, the fault condition is displayed from the display instrument panel, so that the new energy vehicle can intelligently complete the control analysis operation of the charging fault, thereby facilitating the maintenance and processing of personnel, or finding a solution method in time, and avoiding the generation of other problems caused by repeated trial and error.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile charging, and in particular to an intelligent charging control system for new energy vehicles. Background Art

[0002] Referring to a Chinese patent, the patent title is: A New Energy Vehicle Intelligent Charging Control System (Patent Publication Number: CN107117054A, Patent Publication Date: 2017-09-01), which includes a control module, a communication module, and a charging module. The charging module includes an intelligent charging pile, which is used to charge new energy vehicles. The communication module is used for the intelligent charging pile to communicate with an onboard host or mobile device, and for communication between the intelligent charging piles to establish a charging pile management group. The control module is used to obtain the status of the intelligent charging pile and send the status of the intelligent charging pile to the onboard host via the communication module. The onboard host of the new energy vehicle directly communicates with the intelligent charging pile through the communication module, so that the intelligent charging pile is in a real-time online state, without the need for a dedicated handheld identification device, and remotely understands and controls the information of the intelligent charging pile. By establishing a connection between the intelligent charging piles, information exchange and control between the intelligent charging piles are achieved, thereby enhancing the reliability of the system.

[0003] Based on the description in the above-mentioned document, existing new energy vehicles often fail to charge or experience power outages during the charging process, and the reasons for power outages in different situations are also diverse. The existing vehicle-mounted system can only provide feedback that charging is impossible, but cannot display the specific reason for the inability to charge. When encountering this situation, users cannot find the cause of the fault and solve it in time, and can only transport the vehicle to a repair shop for repair operations. However, some faults that can be handled by some personnel are unknown, resulting in a waste of time. For this reason, the present invention provides an intelligent charging control system for new energy vehicles. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an intelligent charging control system for new energy vehicles, which solves the problem that existing new energy vehicles often cannot be charged or have power outages during the charging process. The reasons for power outages in different situations are also diverse, and users are unable to find the cause of the fault and solve it in time, so they can only wait for rescue and waste time.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A new energy vehicle intelligent charging control system, comprising:

[0006] Power supply equipment, which is used to charge batteries for new energy vehicles;

[0007] The on-board charger is used to communicate with the vehicle controller through the high-speed CAN network, upload working status, working parameters and fault alarm information, and receive control commands to start or stop charging;

[0008] The vehicle controller uses sensors and the CAN bus to monitor the vehicle's status in real time, and sends the information to the onboard instrument panel. It also manages the power battery through the charging management system, collecting data and performing real-time analysis during charging to determine the specific cause of a charging fault.

[0009] Display instrument panel, used to display the charging connection status, charging status, and fault status;

[0010] Power batteries, used to store electricity and then power new energy vehicles;

[0011] The fault feedback terminal is used to analyze and judge the faults generated during the charging process, and find out the corresponding fault problems and provide feedback.

[0012] Preferably, the charging management system includes:

[0013] The data acquisition module is used to collect electrical signals from devices running during charging and display the charging status on the dashboard;

[0014] The data analysis module generates two situations after the car is connected to the power supply equipment:

[0015] Normal connection and normal charging: the normal charging operation of the power battery is completed;

[0016] Unable to charge: This means that the device cannot be charged after being connected or the charging is disconnected. This is used to analyze the cause of the disconnection.

[0017] The data feedback module feeds back the specific reasons after analysis to the fault feedback terminal for reception and transmission of processing commands.

[0018] Preferably, the specific analysis steps of the data analysis module in the case of failure to charge are:

[0019] A1. First, determine whether the vehicle is in a power-off state;

[0020] A2. If the operation in A1 is normal, determine the physical connection between the power supply equipment and the on-board charger;

[0021] A3. If the operation in A2 is normal, perform self-test on the vehicle controller and the on-board charger;

[0022] A4. If A1-A3 operate normally but the vehicle still cannot be charged, and the physical connection during the charging process is normal, it is classified as a charging system failure.

[0023] Preferably, in A1, whether the vehicle is in a power-off state is determined by monitoring the vehicle's startup state through the vehicle controller. If it is in the startup state, the fault light displays a red light, otherwise the fault light is off.

[0024] Preferably, the steps for analyzing the physical connection between the power supply device and the on-board charger in A2 are:

[0025] B1. First, after the power supply equipment and the on-board charger are connected through the charging gun, the on-board charger receives the signal and sends a connection message to the vehicle controller;

[0026] B2. The charging management system in the vehicle controller determines the status of each on-board charger and the vehicle controller by whether the message is received;

[0027] B3. Based on the judged situation, the information is fed back to the vehicle display screen. At this time, the vehicle display screen feeds back the status of the vehicle charger or vehicle controller.

[0028] Preferably, the specific methods for sending and receiving messages in B1 and B2 are:

[0029] C1. First, the onboard charger sends a connection request to the vehicle controller. The request is controlled by the charging management system and feedback is obtained, so that the onboard charger and the vehicle controller are connected.

[0030] C2. If the request to establish a connection in C1 is not responded, the charging management system has a fault and feedback is sent to the vehicle display terminal. Otherwise, after the connection is established, the vehicle charger is used to send a charging message to the vehicle controller, where the charging message byte is marked as Where n refers to the byte type, z refers to the message byte number, and the vehicle controller's reception status is fed back to the on-board charger through the charging management system;

[0031] f01. If the charging management system does not receive the charging message bytes from the on-board charger, it will determine that there is a fault in the on-board charger and feedback it to the on-board display terminal for graphic and text display;

[0032] f02. At this time, the charging management system recognizes the charging message bytes of the vehicle charger but does not receive the reply bytes of the vehicle controller. It determines whether the vehicle controller is damaged based on the timeout warning and feeds back the information to the on-board display terminal in graphics and text.

[0033] f03. At this time, the charging management system recognizes the charging message bytes of the on-board charger and receives the reply bytes from the vehicle controller. The bytes are divided into two categories:

[0034] The bytes of the reply message are consistent. Then the on-board charger and the vehicle controller establish a charging connection;

[0035] There are differences in the bytes of the reply message. If there is a fault in the vehicle controller, the fault will be fed back to the on-board display terminal in the form of graphics and text;

[0036] C3. After the charging instruction is established, the charging operation can be carried out.

[0037] Preferably, the step of determining the timeout warning in f02 of C2 is:

[0038] First, the waiting time for the timeout warning to confirm the existence of a fault is set to X, and the time from sending a message to not receiving a reply message is set to T, until the time value T expires after the reply message is received;

[0039] When 0<T≤X, the waiting time is not exceeded, and the on-board charger receives the reply message, and determines whether the reply message is correct. If it is correct, the on-board charger and the vehicle controller establish a charging connection;

[0040] When T>X, the fault waiting time is exceeded and the on-board charger does not receive a reply message. At this time, the charging control system sends a detection message to the vehicle controller for testing. The charging control system sets the time from sending the detection message to not receiving a response to Y, and stops after receiving the test response for a period of Y. The damage duration is also X.

[0041] When 0<T≤X, the waiting time is not exceeded, the charging control system receives a response, and the vehicle controller has a fault;

[0042] When T>X, the response waiting time is exceeded, the charging control system does not receive a response, and the vehicle controller is damaged.

[0043] Preferably, the analysis steps corresponding to the charging system failure in A4 are:

[0044] D1. The vehicle controller controls the power-off operation and identifies whether there are fault codes on the vehicle. If there are fault codes related to the power battery and on-board charger, the fault lights of the power battery and on-board charger will be displayed in red on the instrument panel.

[0045] D2. If there is no fault code during the vehicle charging process in D1 and the vehicle still cannot start charging normally, first switch to slow charging to check whether the slow charging fuse is open. If the slow charging fuse is normally connected, check whether the charging socket temperature sensor, electronic lock and feedback signal terminal are normal. If the slow charging socket temperature sensor, electronic lock and feedback signal terminal are all normal, switch to fast charging state for testing.

[0046] Preferably, the detection result during the operation in D2 is:

[0047] e01. If charging fails when switching to fast charging or slow charging, it is determined that the vehicle controller is faulty;

[0048] e02. If charging can be started by switching to fast charging, but cannot be started by switching to slow charging, it is determined that the on-board charger is faulty.

[0049] Preferably, the operation of finding the corresponding fault problem and providing feedback in the fault feedback terminal is:

[0050] Extract the data of various reasons for charging failure based on the collection and analysis in the charging management system;

[0051] The problem-solving strategy is derived by tracing back the cause data and matching it. If the cause data is not matched in the historical database, the user needs to be informed to rely on external forces to repair the fault.

[0052] The present invention provides an intelligent charging control system for new energy vehicles. Compared with the existing technology, it has the following advantages:

[0053] 1. The intelligent charging control system of the new energy vehicle monitors and analyzes the charging operation through the charging management system in the vehicle controller, uses the data acquisition module to collect information from the charging operation equipment, and promptly analyzes the charging power failure and finds the specific cause after analyzing the information. The fault condition is displayed on the display instrument panel, so that the new energy vehicle can intelligently complete the control and analysis operation of the charging fault to facilitate maintenance and processing by personnel, or find a solution in time, avoiding the occurrence of other problems caused by repeated trial and error.

[0054] 2. The intelligent charging control system for new energy vehicles uses the data analysis module to conduct a specific analysis of charging failures and divides the causes of the failures into physical connection charging problems and charging system failures. This allows the vehicle to handle physical connection charging problems on its own, making it easier for personnel to handle the problem themselves while saving time.

[0055] 3. The intelligent charging control system for new energy vehicles, through further analysis of charging system failure problems, determines whether the cause of the power outage can be handled by personnel themselves when switching between fast charging and slow charging of the control system. If it cannot be handled, the maintenance personnel can be informed in time to perform maintenance operations, thereby improving safety while reducing damage to the vehicle and facilitating charging operations with increased stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 This is a functional block diagram of the charging control system of the present invention;

[0057] Figure 2 This is a logic judgment diagram for fault analysis of the intelligent charging control system of the present invention. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] See also Figure 1-Figure 2 , the present invention provides two technical solutions:

[0060] Embodiment 1: A new energy vehicle intelligent charging control system, comprising:

[0061] Power supply equipment, which is used to charge batteries for new energy vehicles;

[0062] The on-board charger is used to communicate with the vehicle controller through the high-speed CAN network, upload the working status, working parameters and fault alarm information, receive the control command to start or stop charging, and the power value between the power supply equipment and the on-board charger is matched;

[0063] The vehicle controller uses sensors and the CAN bus to monitor the vehicle's status in real time, and sends the information to the onboard instrument panel. It also manages the power battery through the charging management system, collecting data and performing real-time analysis during charging to determine the specific cause of a charging fault.

[0064] Display instrument panel, used to display the charging connection status, charging status, and fault status;

[0065] Power batteries, used to store electricity and then power new energy vehicles;

[0066] The fault feedback terminal is used to analyze and judge the faults generated during the charging process, and find out the corresponding fault problems and provide feedback.

[0067] The fault feedback terminals mainly include the following types when performing fault feedback:

[0068] First, determine whether the vehicle is in a power-off state: If the fault light is red, the vehicle is in the starting state. At this time, you need to disconnect the vehicle from the power and reconnect the charging gun to charge the vehicle.

[0069] Secondly, determine the physical connection between the power supply device and the on-board charger. If the charging light on the dashboard is green, the physical connection is normal. If the charging light on the dashboard is red, there is a physical connection failure. In this case, you need to reinsert the charging gun and reconnect the signal.

[0070] Then, the vehicle controller self-tests and the on-board charger is tested. For the operation of the vehicle controller self-test and the on-board charger test, please refer to the patent document titled "A Self-Test Method for On-Board Charger, On-Board Controller and Readable Storage Medium" (Patent Publication No.: CN116198322A). At this time, the vehicle controller or the on-board charger needs to be replaced or repaired.

[0071] And when the vehicle controller has a fault code when controlling the power battery and the on-board charger, it is necessary to clear the problem caused by the fault code. At the same time, if the charging operation still cannot be started normally after clearing, replace the vehicle controller first and then replace the on-board charger;

[0072] Finally, as for the cause of failure of the power battery itself, when the power battery is aged and damaged and cannot be used, the power battery needs to be replaced. If the power battery cannot continue to charge in an overcold or overheated environment, the power battery needs to be preheated or cooled.

[0073] In an embodiment of the present invention, the charging management system includes:

[0074] The data acquisition module is used to collect electrical signals from devices running during charging and display the charging status on the dashboard;

[0075] The data analysis module generates two situations after the car is connected to the power supply equipment:

[0076] Normal connection and normal charging: the normal charging operation of the power battery is completed;

[0077] Unable to charge: This means that the device cannot be charged after being connected or the charging is disconnected. This is used to analyze the cause of the disconnection.

[0078] The data feedback module feeds back the specific reasons after analysis to the fault feedback terminal for reception and transmission of processing commands.

[0079] Among them, the charging operation is monitored and analyzed by the charging management system in the vehicle controller, and the data acquisition module is used to collect information from the charging operation equipment. After analyzing the information, the charging power failure is analyzed and the specific cause is found in time, and the fault condition is displayed on the display instrument panel, so that the new energy vehicle can intelligently complete the control and analysis operation of the charging fault, so as to facilitate the maintenance and processing of personnel, or find a solution in time, avoiding the occurrence of other problems caused by repeated trial and error.

[0080] In the embodiment of the present invention, the specific analysis steps of the data analysis module in the case of failure to charge are as follows:

[0081] A1. First, determine whether the vehicle is in a power-off state;

[0082] A2. If the operation in A1 is normal, determine the physical connection between the power supply equipment and the on-board charger;

[0083] A3. If the operation in A2 is normal, perform self-test on the vehicle controller and the on-board charger;

[0084] A4. If A1-A3 operate normally but the vehicle still cannot be charged, and the physical connection during the charging process is normal, it is classified as a charging system failure.

[0085] Among them, through the data analysis module's specific analysis of the situation where charging is impossible, the causes of the failure are divided into physical connection charging problems and charging system failure problems. In this way, physical connection charging problems can be handled by themselves, which is convenient for personnel to handle themselves and saves time.

[0086] In the embodiment of the present invention, in A1, it is determined whether the vehicle is in a power-off state by monitoring the startup state of the vehicle through the vehicle controller. If it is in the startup state, the fault light will display red, otherwise the fault light will go out.

[0087] In the embodiment of the present invention, the steps for analyzing the physical connection between the power supply device and the on-board charger in A2 are as follows:

[0088] B1. First, after the power supply equipment and the on-board charger are connected through the charging gun, the on-board charger receives the signal and sends a connection message to the vehicle controller;

[0089] B2. The charging management system in the vehicle controller determines the status of each on-board charger and the vehicle controller by whether the message is received;

[0090] B3. Based on the judged situation, the information is fed back to the vehicle display screen. At this time, the vehicle display screen feeds back the status of the vehicle charger or vehicle controller.

[0091] In the embodiment of the present invention, the specific methods for sending and receiving messages in B1 and B2 are:

[0092] C1. First, the onboard charger sends a connection request to the vehicle controller. The request is controlled by the charging management system and feedback is obtained, so that the onboard charger and the vehicle controller are connected.

[0093] C2. If the request to establish a connection in C1 is not responded, the charging management system has a fault and feedback is sent to the vehicle display terminal. Otherwise, after the connection is established, the vehicle charger is used to send a charging message to the vehicle controller, where the charging message byte is marked as Where n refers to the byte type, z refers to the message byte number, and the vehicle controller's reception status is fed back to the on-board charger through the charging management system;

[0094] f01. If the charging management system does not receive the charging message bytes from the on-board charger, it will determine that there is a fault in the on-board charger and feedback it to the on-board display terminal for graphic and text display;

[0095] f02. At this time, the charging management system recognizes the charging message bytes of the vehicle charger but does not receive the reply bytes of the vehicle controller. It determines whether the vehicle controller is damaged based on the timeout warning and feeds back the information to the on-board display terminal in graphics and text.

[0096] f03. At this time, the charging management system recognizes the charging message bytes of the on-board charger and receives the reply bytes from the vehicle controller. The bytes are divided into two categories:

[0097] The bytes of the reply message are consistent. Then the on-board charger and the vehicle controller establish a charging connection;

[0098] There are differences in the bytes of the reply message. If there is a fault in the vehicle controller, the fault will be fed back to the on-board display terminal in the form of graphics and text;

[0099] C3. After the charging instruction is established, the charging operation can be carried out.

[0100] In the embodiment of the present invention, the determination step for the timeout warning in f02 of C2 is:

[0101] First, the waiting time for the timeout warning to confirm the existence of a fault is set to X, and the time from sending a message to not receiving a reply message is set to T, until the time value T expires after the reply message is received;

[0102] When 0<T≤X, the waiting time is not exceeded, and the on-board charger receives the reply message, and determines whether the reply message is correct. If it is correct, the on-board charger and the vehicle controller establish a charging connection;

[0103] When T>X, the fault waiting time is exceeded and the on-board charger does not receive a reply message. At this time, the charging control system sends a detection message to the vehicle controller for testing. The charging control system sets the time from sending the detection message to not receiving a response to Y, and stops after receiving the test response for a period of Y. The damage duration is also X.

[0104] When 0<T≤X, the waiting time is not exceeded, the charging control system receives a response, and the vehicle controller has a fault;

[0105] When T>X, the response waiting time is exceeded, the charging control system does not receive a response, and the vehicle controller is damaged.

[0106] In the embodiment of the present invention, the analysis steps corresponding to the charging system fault in A4 are:

[0107] D1. The vehicle controller controls the power-off operation and identifies whether there are fault codes on the vehicle. If there are fault codes related to the power battery and on-board charger, the fault lights of the power battery and on-board charger will be displayed in red on the instrument panel.

[0108] D2. If there is no fault code during the vehicle charging process in D1 and the vehicle still cannot start charging normally, first switch to slow charging to check whether the slow charging fuse is open. If the slow charging fuse is normally connected, check whether the charging socket temperature sensor, electronic lock and feedback signal terminal are normal. If the slow charging socket temperature sensor, electronic lock and feedback signal terminal are all normal, switch to fast charging state for testing.

[0109] In the embodiment of the present invention, the operation of finding the corresponding fault problem and providing feedback in the fault feedback terminal is:

[0110] Extract the data of various reasons for charging failure based on the collection and analysis in the charging management system;

[0111] The problem-solving strategy is derived by tracing back the cause data and matching it. If the cause data is not matched in the historical database, the user needs to be informed to rely on external forces to repair the fault.

[0112] The difference between the second embodiment and the first embodiment is that:

[0113] In the embodiment of the present invention, the detection result during the operation in D2 is:

[0114] e01. If charging fails when switching to fast charging or slow charging, it is determined that the vehicle controller is faulty;

[0115] e02. If charging can be started by switching to fast charging, but cannot be started by switching to slow charging, it is determined that the on-board charger is faulty.

[0116] In the embodiment of the present invention, the cause of the power battery failure in D1 is:

[0117] F1. The power battery is aged and damaged and cannot be used;

[0118] F2. The power battery cannot continue to charge when it is in an overly cold or overheated environment.

[0119] In the embodiment of the present invention, the detection operation of the power battery charging temperature in F2 is:

[0120] Wherein the lower value of the temperature when the power battery is charged is 0, the upper value of the temperature when the power battery is charged is P, and Q is the temperature value when the battery is charged;

[0121] s01. When Q < 0, the ambient temperature for battery charging is too low and charging is impossible.

[0122] s02. When O≤Q≤P, the ambient temperature for battery charging is within the range and charging is possible;

[0123] s03. When Q>0, the ambient temperature of the battery charging is too high and charging is impossible.

[0124] When in the s01 state, the battery charging environment is preheated by starting the vehicle, and when in the s03 state, the battery charging environment is cooled and dissipated by the autonomous heat dissipation after charging is suspended or by the vehicle's cooling fan.

[0125] Among them, through further analysis of the charging system failure problem, under the detection operation of switching fast charging and slow charging of the control system, it is judged whether the cause of the power outage can be handled by the personnel themselves. If it cannot be handled, the maintenance personnel can be informed in time to perform maintenance operations, thereby improving safety while reducing damage to the car, and facilitating charging operations to improve stability during charging.

[0126] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

[0127] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0128] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent charging control system for new energy vehicles, characterized by: include: Power supply equipment, which is used to charge batteries for new energy vehicles; The on-board charger is used to communicate with the vehicle controller through the high-speed CAN network, upload working status, working parameters and fault alarm information, and receive control commands to start or stop charging; The vehicle controller uses sensors and the CAN bus to monitor the vehicle's status in real time, and sends the information to the onboard instrument panel. It also manages the power battery through the charging management system, collecting data and performing real-time analysis during charging to determine the specific cause of charging failures. Display instrument panel, used to display the charging connection status, charging status, and fault status; Power batteries, used to store electricity and then power new energy vehicles; The fault feedback terminal is used to analyze and judge the faults generated during the charging process, and find out the corresponding fault problems and provide feedback.

2. The intelligent charging control system for new energy vehicles according to claim 1, characterized in that: The charging management system includes: The data acquisition module is used to collect electrical signals from devices running during charging and display the charging status on the dashboard; The data analysis module generates two situations after the car is connected to the power supply equipment: Normal connection and normal charging: the normal charging operation of the power battery is completed; Unable to charge: This means that the device cannot be charged after being connected or the charging is disconnected. This is used to analyze the cause of the disconnection. The data feedback module feeds back the specific reasons after analysis to the fault feedback terminal for reception and transmission of processing commands.

3. The intelligent charging control system for new energy vehicles according to claim 2, characterized in that: The specific analysis steps of the data analysis module for the case of failure to charge are as follows: A1. First, determine whether the vehicle is in a power-off state; A2. If the operation in A1 is normal, determine the physical connection between the power supply equipment and the on-board charger; A3. If the operation in A2 is normal, perform self-test on the vehicle controller and the on-board charger; A4. If A1-A3 operate normally but the vehicle still cannot be charged, and the physical connection during the charging process is normal, it is classified as a charging system failure.

4. The intelligent charging control system for new energy vehicles according to claim 3, characterized in that: In A1, it is determined whether the vehicle is in a power-off state by monitoring the vehicle's startup state through the vehicle controller. If it is in the startup state, the fault light will display red, otherwise the fault light will go out.

5. The intelligent charging control system for new energy vehicles according to claim 3, characterized in that: The analysis steps for the physical connection between the power supply equipment and the on-board charger in A2 are as follows: B1. First, after the power supply equipment and the on-board charger are connected through the charging gun, the on-board charger receives the signal and sends a connection message to the vehicle controller; B2. The charging management system in the vehicle controller determines the status of each on-board charger and the vehicle controller by whether the message is received; B3. Based on the judged situation, the information is fed back to the vehicle display screen. At this time, the vehicle display screen feeds back the status of the vehicle charger or vehicle controller.

6. The intelligent charging control system for new energy vehicles according to claim 5, characterized in that: The specific methods for sending and receiving messages in B1 and B2 are: C1. First, the onboard charger sends a connection request to the vehicle controller. The request is controlled by the charging management system and feedback is obtained, so that the onboard charger and the vehicle controller are connected. C2. If the request to establish a connection in C1 is not responded, the charging management system has a fault and feedback is sent to the vehicle display terminal. Otherwise, after the connection is established, the vehicle charger is used to send a charging message to the vehicle controller, where the charging message byte is marked as Where n refers to the byte type, z refers to the message byte number, and the vehicle controller's reception status is fed back to the on-board charger through the charging management system; f01. If the charging management system does not receive the charging message bytes from the on-board charger, it will determine that there is a fault in the on-board charger and feedback it to the on-board display terminal for graphic and text display; f02. At this time, the charging management system recognizes the charging message bytes of the vehicle charger but does not receive the reply bytes of the vehicle controller. It determines whether the vehicle controller is damaged based on the timeout warning and feeds back the information to the on-board display terminal in graphics and text. f03. At this time, the charging management system recognizes the charging message bytes of the on-board charger and receives the reply bytes from the vehicle controller. The bytes are divided into two categories: The bytes of the reply message are consistent. Then the on-board charger and the vehicle controller establish a charging connection; There are differences in the bytes of the reply message. If there is a fault in the vehicle controller, the fault will be fed back to the on-board display terminal in the form of graphics and text; C3. After the charging instruction is established, the charging operation can be carried out.

7. The intelligent charging control system for new energy vehicles according to claim 6, characterized in that: The determination steps for the timeout warning in f02 of C2 are as follows: First, the waiting time for the timeout warning to confirm the existence of a fault is set to X, and the time from sending a message to not receiving a reply message is set to T, until the time value T expires after the reply message is received; When 0<T≤X, the waiting time is not exceeded, and the on-board charger receives the reply message, and determines whether the reply message is correct. If it is correct, the on-board charger and the vehicle controller establish a charging connection; When T>X, the fault waiting time is exceeded and the on-board charger does not receive a reply message. At this time, the charging control system sends a detection message to the vehicle controller for testing. The charging control system sets the time from sending the detection message to not receiving a response to Y, and stops after receiving the test response for a period of Y. The damage duration is also X. When 0<T≤X, the waiting time is not exceeded, the charging control system receives a response, and the vehicle controller has a fault; When T>X, the response waiting time is exceeded, the charging control system does not receive a response, and the vehicle controller is damaged.

8. The intelligent charging control system for new energy vehicles according to claim 3, characterized in that: The analysis steps for the charging system fault in A4 are as follows: D1. The vehicle controller controls the power-off operation and identifies whether there are fault codes on the vehicle. If there are fault codes related to the power battery and on-board charger, the fault lights of the power battery and on-board charger will be displayed in red on the instrument panel. D2. If there is no fault code during the vehicle charging process in D1 and the vehicle still cannot start charging normally, first switch to slow charging to check whether the slow charging fuse is open. If the slow charging fuse is normally connected, check whether the charging socket temperature sensor, electronic lock and feedback signal terminal are normal. If the slow charging socket temperature sensor, electronic lock and feedback signal terminal are all normal, switch to fast charging state for testing.

9. The intelligent charging control system for new energy vehicles according to claim 8, characterized in that: The detection results in the operation of D2 are: e01. If charging fails when switching to fast charging or slow charging, it is determined that the vehicle controller is faulty; e02. If charging can be started by switching to fast charging, but cannot be started by switching to slow charging, it is determined that the on-board charger is faulty.

10. The intelligent charging control system for new energy vehicles according to claim 1, characterized in that: The operation of finding the corresponding fault problem and providing feedback in the fault feedback terminal is: Extract the data of various reasons for charging failure based on the collection and analysis in the charging management system; The problem-solving strategy is derived by tracing back the cause data and matching it. If the cause data is not matched in the historical database, the user needs to be informed to rely on external forces to repair the fault.

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