A method and system for identifying and warning abnormalities of power circuit nodes of new energy vehicles

Abstract

The present invention provides a method and system for identifying and warning abnormalities of power circuit nodes of new energy vehicles. The method comprises: generating a current working power circuit diagram of a new energy vehicle; obtaining a loop current corresponding to a power battery of the new energy vehicle, and judging whether the loop current is within a predicted current range to obtain a judgment result, and judging whether the power circuit of the new energy vehicle has an abnormality according to the judgment result; when it is judged that the power circuit of the new energy vehicle has an abnormality, performing intelligent power consumption analysis on the current working power circuit diagram based on the working voltage of each monitored circuit device, and determining abnormal nodes of the power circuit of the new energy vehicle according to the power consumption analysis result; generating a power circuit warning voice based on the abnormal nodes, and generating an abnormality guide map for display on a vehicle control display screen, so as to realize automatic detection and precise positioning of abnormal positions of the power circuit, effectively improving the driving safety of new energy vehicles while improving the efficiency of vehicle fault repair.

Description

Technical Field

[0001] The present invention relates to the technical field of power circuit fault identification, and in particular to a method and system for identifying and warning abnormalities of power circuit nodes of new energy vehicles. Background Art

[0002] At present, electric vehicles are widely loved by the public as the main new energy vehicles, and they are quickly becoming a more suitable travel and driving choice in people's minds. The core system of electric vehicles is usually called the three-electric system, which includes the following three main parts: battery system, motor system and electronic control system. Among them, the power battery is the core component of the battery system, and the battery power supply requires the power circuit to combine and connect the various electrical devices of the new energy vehicle. If an abnormality occurs at any position of the power circuit, it is very likely to cause an accident to the vehicle. New energy vehicles mainly rely on electricity for energy supply, which also makes the circuit of new energy vehicles more complicated. When an abnormality occurs in the power circuit of a new energy vehicle, the complex power circuit is easy to make it difficult to determine the abnormal node, resulting in the problem of increased maintenance time of the power circuit. Summary of the invention

[0003] The present invention provides a method and system for identifying and warning abnormalities in power circuit nodes of new energy vehicles, which are used to solve the above-mentioned problems, realize automatic detection and precise positioning of abnormal positions of power circuits, effectively improve the driving safety of new energy vehicles, and improve the efficiency of vehicle fault repair.

[0004] The present invention provides a method for identifying and warning abnormalities of power circuit nodes of new energy vehicles, comprising:

[0005] Step 1: Based on the working data of the new energy vehicle and its vehicle power circuit structure diagram, generate the current working power circuit diagram of the new energy vehicle;

[0006] Step 2: Obtain the loop current corresponding to the power battery of the new energy vehicle, and determine whether the loop current is within the predicted current range, obtain a determination result, and determine whether there is an abnormality in the power circuit of the new energy vehicle according to the determination result;

[0007] Step 3: When it is determined that the power circuit of the new energy vehicle is abnormal, the operating voltage of each monitored circuit component in the current working power circuit diagram is obtained respectively, and the current working power circuit diagram is intelligently analyzed for power consumption based on the operating voltage, and the abnormal node of the power circuit of the new energy vehicle is determined according to the power consumption analysis result;

[0008] Step 4: Based on the abnormal node, a power circuit warning voice is generated, and an abnormal guidance diagram is generated and displayed on the vehicle control display screen.

[0009] Preferably, in a method for identifying and warning abnormalities of power circuit nodes of new energy vehicles, step 1 includes:

[0010] Determine the operating functions of new energy vehicles based on the working data of new energy vehicles;

[0011] According to the corresponding relationship between the operating function and the power circuit, determine the power circuit sub-circuit currently running in the new energy vehicle;

[0012] The currently running power circuit sub-loop is highlighted on the whole vehicle power circuit structure diagram of the new energy vehicle to generate the current working power circuit diagram.

[0013] Preferably, in a method for identifying and warning abnormalities of power circuit nodes of new energy vehicles, step 2 includes:

[0014] Obtain the resistance change characteristics corresponding to each electrical device in the power circuit of the new energy vehicle respectively, and determine the normal resistance floating range of each electrical device during operation based on the resistance change characteristics;

[0015] Based on the current working power circuit diagram, determine the current operating electrical components;

[0016] According to the normal resistance floating range corresponding to the currently operating electrical components and the connection relationship corresponding to each currently operating electrical component in the current working power circuit diagram, the internal resistance value of the current working power circuit is evaluated to obtain the predicted range of the circuit internal resistance;

[0017] Based on the predicted range of the current circuit internal resistance and the supply voltage of the new energy vehicle battery to the current working power circuit, the predicted current range is obtained;

[0018] Determining whether the loop current is within the predicted current range, and if so, determining that the power circuit of the new energy vehicle is normal;

[0019] Otherwise, it is determined that there is an abnormality in the power circuit of the new energy vehicle.

[0020] Preferably, in a method for identifying and warning abnormalities of power circuit nodes of new energy vehicles, step 3 includes:

[0021] Obtain the working voltage of each monitored circuit device in the current working power circuit diagram;

[0022] Determining whether the operating voltage is within the rated operating range, and if not, determining that an abnormality exists in the power circuit sub-circuit corresponding to the monitored circuit device;

[0023] If yes, then obtain the current working current corresponding to the monitored circuit device, and if the current working current is within the standard range corresponding to the monitored circuit device, then determine that the power circuit sub-loop corresponding to the monitored circuit device is normal;

[0024] If the current operating current is not within the standard range corresponding to the monitored circuit device, the monitored circuit device is regarded as an abnormal circuit node.

[0025] Preferably, in a method for identifying and warning abnormality of power circuit nodes of new energy vehicles, when it is determined that the power circuit sub-loop corresponding to the monitored circuit device has an abnormality, it includes:

[0026] Obtaining an associated circuit node corresponding to the monitored circuit device, and obtaining abnormality judgment results corresponding to all target monitored circuit devices connected to the associated circuit node;

[0027] When the abnormality judgment results corresponding to all target monitored circuit devices are abnormal, it is determined that there is an abnormality in the connection line between the associated circuit node and the target monitored circuit device, and the associated circuit node is an abnormal circuit node;

[0028] Otherwise, based on a plurality of preset circuit analysis methods, the power circuit sub-loop corresponding to the monitored circuit device is analyzed to determine the abnormal circuit node.

[0029] Preferably, in a method for identifying and warning abnormalities of power circuit nodes of new energy vehicles, step 4 includes:

[0030] Based on the vehicle power circuit structure diagram, determine the position of the abnormal circuit node in the new energy vehicle architecture, and generate a power circuit warning voice according to the corresponding electrical components of the position;

[0031] Circuit fault warning is carried out through the speakers of new energy vehicles. Based on the position determination results, the fault location is marked on the vehicle power circuit structure diagram, and an abnormal guidance diagram of the new energy vehicle power circuit is generated and sent to the vehicle control display screen for display.

[0032] Preferably, in a new energy vehicle power circuit node abnormality identification and early warning method, an abnormality guidance diagram of the new energy vehicle power circuit is generated and sent to the vehicle control display screen for display, including:

[0033] Upload the abnormal guidance map to the cloud account corresponding to the new energy vehicle at the same time, and judge whether the vehicle control display screen is operating normally;

[0034] If yes, the abnormal guidance map is sent to the vehicle control display screen for display;

[0035] If not, the abnormal guidance map is automatically sent to the associated mobile terminal.

[0036] Preferably, in a method for identifying and warning abnormalities of power circuit nodes of a new energy vehicle, while marking the fault position of the power circuit structure diagram of the whole vehicle, it also includes:

[0037] Based on a preset fault level table, determine the fault risk level corresponding to the fault mark position;

[0038] When the fault risk level is greater than or equal to the preset level, a stop point query is performed based on the navigation map to determine the safe stop point closest to the new energy vehicle, and an emergency stop instruction is sent to the new energy vehicle, and a temporary navigation guide is generated based on the safe stop point;

[0039] When the fault risk level is lower than the preset level, the urgency of fault handling at the fault mark location is determined based on the fault risk level combined with the current actual environment data;

[0040] When the fault mark position needs to be processed immediately, the fault cause of the current fault mark position is inferred according to the abnormal node and big data analysis to obtain the predicted fault cause, and the maintenance point query is performed based on the navigation map and the predicted fault cause. Based on the principle of proximity, the best maintenance point is recommended to the new energy vehicle;

[0041] When the fault mark position does not need to be processed immediately, the fault warning is issued after the driver arrives at the destination.

[0042] Preferably, in a method for identifying and warning abnormalities of power circuit nodes of new energy vehicles, generating temporary navigation guidance based on safe stopping points also includes:

[0043] Based on the fault mark position, determine whether the abnormal node will affect the braking system of the new energy vehicle. If so, determine that the current vehicle is at risk of losing control. If the new energy vehicle does not move according to the temporary navigation instructions, send a risk vehicle warning to the road management personnel;

[0044] Otherwise, continue to recommend safe stopping points to the new energy vehicle until it stops.

[0045] The present invention provides a new energy vehicle power circuit node abnormality identification and early warning system, comprising:

[0046] A working circuit determination module is used to generate a current working power circuit diagram of the new energy vehicle based on the working data of the new energy vehicle and the power circuit structure diagram of the whole vehicle;

[0047] A circuit abnormality judgment module is used to obtain the loop current corresponding to the power battery of the new energy vehicle, and judge whether the loop current is within the predicted current range, obtain a judgment result, and judge whether there is an abnormality in the power circuit of the new energy vehicle according to the judgment result;

[0048] An abnormal node determination module is used to obtain the working voltage of each monitored circuit device in the current working power circuit diagram respectively when it is determined that the power circuit of the new energy vehicle is abnormal, perform intelligent power consumption analysis on the current working power circuit diagram based on the working voltage, and determine the abnormal node of the power circuit of the new energy vehicle according to the power consumption analysis result;

[0049] The circuit abnormality warning module is used to generate a power circuit warning voice based on the abnormal node, and generate an abnormality guide map for display on the vehicle control display screen.

[0050] Compared with the prior art, the present invention has at least the following beneficial effects:

[0051] The present invention generates a current working power circuit diagram of the new energy vehicle based on working data of the new energy vehicle and a whole vehicle power circuit structure diagram thereof, visualizes the working circuit of the new energy vehicle, then obtains the loop current corresponding to the power battery of the new energy vehicle, and judges whether the loop current is within the predicted current range to obtain a judgment result, judges whether the power circuit of the new energy vehicle is abnormal according to the judgment result, completes a preliminary judgment on the abnormality of the whole vehicle circuit of the new energy vehicle, and when it is determined that the power circuit of the new energy vehicle is abnormal, respectively obtains the working voltage of each monitored circuit device in the current working power circuit diagram, performs intelligent power consumption analysis on the current working power circuit diagram based on the working voltage, determines the abnormal node of the power circuit of the new energy vehicle according to the power consumption analysis result, realizes microscopic identification of the abnormal circuit of the new energy vehicle, and promptly determines the abnormal position of the circuit, and finally, based on the abnormal node, generates a power circuit warning voice to complete the circuit warning of the new energy vehicle, and generates an abnormal guidance diagram to be displayed on the vehicle control display screen, which is beneficial for vehicle maintenance personnel to quickly determine the problem location in the process of repairing the abnormal circuit, and improves the circuit maintenance efficiency of the new energy vehicle.

[0052] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0053] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0055] Figure 1 This is a flow chart of a method for identifying and warning abnormalities in power circuit nodes of new energy vehicles according to the present invention;

[0056] Figure 2 This is a flow chart of step 1 of a method for identifying and warning abnormalities in power circuit nodes of new energy vehicles according to the present invention;

[0057] Figure 3 This is a flow chart of step 2 of a method for identifying and warning abnormalities in power circuit nodes of a new energy vehicle according to the present invention;

[0058] Figure 4 This is a flow chart of step 4 of a method for identifying and warning abnormalities in power circuit nodes of a new energy vehicle according to the present invention;

[0059] Figure 5 This is a structural diagram of a new energy vehicle power circuit node abnormality identification and early warning system of the present invention. DETAILED DESCRIPTION

[0060] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0061] Embodiment 1:

[0062] The present invention provides a method for identifying and warning abnormalities of power circuit nodes of new energy vehicles, such as Figure 1 As shown, including:

[0063] Step 1: Based on the working data of the new energy vehicle and its vehicle power circuit structure diagram, generate the current working power circuit diagram of the new energy vehicle;

[0064] Step 2: Obtain the loop current corresponding to the power battery of the new energy vehicle, and determine whether the loop current is within the predicted current range, obtain a determination result, and determine whether there is an abnormality in the power circuit of the new energy vehicle according to the determination result;

[0065] Step 3: When it is determined that the power circuit of the new energy vehicle is abnormal, the operating voltage of each monitored circuit component in the current working power circuit diagram is obtained respectively, and the current working power circuit diagram is intelligently analyzed for power consumption based on the operating voltage, and the abnormal node of the power circuit of the new energy vehicle is determined according to the power consumption analysis result;

[0066] Step 4: Based on the abnormal node, a power circuit warning voice is generated, and an abnormal guidance diagram is generated and displayed on the vehicle control display screen.

[0067] The beneficial effects of the above technical solution are as follows: based on the working data of the new energy vehicle and the power circuit structure diagram of the whole vehicle, the present invention generates the current working power circuit diagram of the new energy vehicle, visualizes the working circuit of the new energy vehicle, then obtains the loop current corresponding to the power battery of the new energy vehicle, and judges whether the loop current is within the predicted current range to obtain a judgment result. According to the judgment result, it is judged whether there is an abnormality in the power circuit of the new energy vehicle, and a preliminary judgment on the abnormality of the whole circuit of the new energy vehicle is completed. When it is determined that there is an abnormality in the power circuit of the new energy vehicle, the working voltage of each monitored circuit device in the current working power circuit diagram is obtained respectively, and the current working power circuit diagram is intelligently analyzed based on the working voltage. According to the power analysis result, the abnormal node of the power circuit of the new energy vehicle is determined, and the microscopic identification of the abnormal circuit of the new energy vehicle is realized, and the abnormal position of the circuit is determined in time. Finally, based on the abnormal node, a power circuit warning voice is generated to complete the circuit warning of the new energy vehicle, and an abnormal guide map is generated to be displayed on the vehicle control display screen, which is conducive to vehicle maintenance personnel to quickly determine the problem location in the process of repairing the abnormal circuit, and improve the maintenance efficiency of the new energy vehicle circuit.

[0068] Embodiment 2:

[0069] On the basis of Example 1, step 1, such as Figure 2 As shown, including:

[0070] Step 101: Determine the operating function of the new energy vehicle based on the operating data of the new energy vehicle;

[0071] Step 102: determining the power circuit sub-loop currently running in the new energy vehicle according to the corresponding relationship between the operating function and the power circuit;

[0072] Step 103: highlighting the currently running power circuit sub-loop on the whole vehicle power circuit structure diagram of the new energy vehicle to generate a current working power circuit diagram.

[0073] The beneficial effects of the above technical solution are as follows: the present invention determines the operating function of the new energy vehicle based on the working data of the new energy vehicle, and thus determines the power circuit sub-circuit currently running in the new energy vehicle according to the correspondence between the operating function and the power circuit, and highlights the currently running power circuit sub-circuit on the whole vehicle power circuit structure diagram of the new energy vehicle, generates the current working power circuit diagram, realizes the automatic identification and determination of the current running circuit of the new energy vehicle, and provides a basis for the visualization of subsequent abnormal nodes.

[0074] Embodiment 3:

[0075] Based on Example 1, step 2, such as Figure 3 As shown, including:

[0076] Step 201: respectively obtaining the resistance variation characteristics corresponding to each electrical device in the power circuit of the new energy vehicle, and determining the normal resistance floating range of each electrical device during operation based on the resistance variation characteristics;

[0077] Step 202: determining the current operating electrical components based on the current working power circuit diagram;

[0078] Step 203: Evaluate the internal resistance value of the current working power circuit according to the normal resistance floating range corresponding to the current operating electrical components and the connection relationship corresponding to each current working electrical component in the current working power circuit diagram to obtain the circuit internal resistance prediction range;

[0079] Step 204: obtaining a predicted current range based on the predicted range of the current circuit internal resistance and the supply voltage of the new energy vehicle battery to the current working power circuit;

[0080] Step 205: determining whether the loop current is within the predicted current range, and if so, determining that the power circuit of the new energy vehicle is normal;

[0081] Otherwise, it is determined that there is an abnormality in the power circuit of the new energy vehicle.

[0082] In this embodiment, the normal resistance floating range refers to the internal resistance floating range of the electrical device during normal operation due to the influence of thermal effect.

[0083] The beneficial effects of the above technical solution are as follows: the present invention respectively obtains the resistance change characteristics corresponding to each electrical device in the power circuit of a new energy vehicle, and based on the resistance change characteristics, respectively determines the normal resistance floating range of each electrical device during operation, and then determines the currently operating electrical device based on the current working power circuit diagram, and evaluates the internal resistance value of the current working power circuit according to the normal resistance floating range corresponding to the currently operating electrical device and the connection relationship corresponding to each current working electrical device in the current working power circuit diagram, and obtains the predicted range of the circuit internal resistance, which is beneficial to improving the accuracy of the prediction of the current range of the operating power circuit, and finally, based on the current circuit internal resistance prediction range and the power supply voltage of the new energy vehicle battery to the current working power circuit, obtains the predicted current range and determines whether the loop current is within the predicted current range, thereby completing the preliminary judgment of the abnormality of the new energy vehicle circuit.

[0084] Embodiment 4:

[0085] On the basis of Example 1, step 3 comprises:

[0086] Obtain the working voltage of each monitored circuit device in the current working power circuit diagram;

[0087] Determining whether the operating voltage is within the rated operating range, and if not, determining that an abnormality exists in the power circuit sub-circuit corresponding to the monitored circuit device;

[0088] If yes, then obtain the current working current corresponding to the monitored circuit device, and if the current working current is within the standard range corresponding to the monitored circuit device, then determine that the power circuit sub-loop corresponding to the monitored circuit device is normal;

[0089] If the current operating current is not within the standard range corresponding to the monitored circuit device, the monitored circuit device is regarded as an abnormal circuit node.

[0090] Monitored circuit devices refer to electrical devices whose working current and voltage are monitored in the power circuit of new energy vehicles.

[0091] In this embodiment, the abnormal circuit node includes an abnormal electrical device or an abnormal circuit.

[0092] Beneficial effects of the above technical solution: The present invention first detects the working state of the monitored circuit device by combining the working voltage and working current of the monitored circuit device, which is beneficial to improving the accuracy of determining abnormal electrical devices or abnormal lines.

[0093] Embodiment 5:

[0094] On the basis of Embodiment 4, when it is determined that the power circuit sub-loop corresponding to the monitored circuit device has an abnormality, the method includes:

[0095] Obtaining an associated circuit node corresponding to the monitored circuit device, and obtaining abnormality judgment results corresponding to all target monitored circuit devices connected to the associated circuit node;

[0096] When the abnormality judgment results corresponding to all target monitored circuit devices are abnormal, it is determined that there is an abnormality in the connection line between the associated circuit node and the target monitored circuit device, and the associated circuit node is an abnormal circuit node;

[0097] Otherwise, based on a plurality of preset circuit analysis methods, the power circuit sub-loop corresponding to the monitored circuit device is analyzed to determine the abnormal circuit node.

[0098] In this embodiment, the associated circuit node refers to a circuit node connected to the monitored circuit device.

[0099] The preset circuit analysis methods include but are not limited to the superposition principle, branch current method, node voltage method, Thevenin's theorem, equivalent power theorem, etc.

[0100] The beneficial effects of the above technical solution are as follows: the present invention detects the circuit lines corresponding to the associated circuit nodes based on the abnormal judgment results of multiple monitored circuit devices corresponding to the associated circuit nodes, and when the abnormal judgment results are not all abnormal, based on multiple preset circuit analysis methods, analyzes the power circuit sub-loops corresponding to the monitored circuit devices, determines the abnormal circuit nodes, realizes the refined analysis of the power circuit, and the intelligent analysis of the running power circuit, completes the autonomous determination of the circuit abnormality position, and provides a reliable basis for the maintenance of new energy circuits.

[0101] Embodiment 6:

[0102] Based on Example 1, step 4, as Figure 4 As shown, including:

[0103] Step 401: based on the vehicle power circuit structure diagram, determine the position of the abnormal circuit node in the new energy vehicle architecture, and generate a power circuit warning voice according to the electrical components corresponding to the position;

[0104] Step 402: Provide circuit fault warning through the speaker of the new energy vehicle, and based on the position determination result, mark the fault position on the vehicle power circuit structure diagram, generate an abnormal guidance diagram of the new energy vehicle power circuit, and send it to the vehicle control display screen for display.

[0105] The beneficial effects of the above technical solution are as follows: the present invention first determines the position of the abnormal circuit node in the new energy vehicle framework based on the power circuit structure diagram of the whole vehicle, and generates a power circuit warning voice according to the electrical devices corresponding to the position to realize the power circuit abnormality warning, and performs circuit fault warning through the speaker of the new energy vehicle to remind the driver to find the circuit abnormality problem in time. At the same time, based on the position determination result, the fault position is marked on the power circuit structure diagram of the whole vehicle, and an abnormal guidance map of the power circuit of the new energy vehicle is generated and sent to the vehicle control display screen for display, which is convenient for the driver to check the vehicle abnormality, which is beneficial for the driver to determine the correct handling measures according to the abnormal problem. At the same time, it can also provide guidance for the maintenance of new energy vehicles, shorten the time consumed in finding the abnormal position during vehicle maintenance, thereby improving the maintenance efficiency of new energy vehicles.

[0106] Embodiment 7:

[0107] On the basis of Example 6, an abnormal guidance diagram of the power circuit of a new energy vehicle is generated and sent to the vehicle control display screen for display, including:

[0108] Upload the abnormal guidance map to the cloud account corresponding to the new energy vehicle at the same time, and judge whether the vehicle control display screen is operating normally;

[0109] If yes, the abnormal guidance map is sent to the vehicle control display screen for display;

[0110] If not, the abnormal guidance map is automatically sent to the associated mobile terminal.

[0111] The beneficial effects of the above technical solution are as follows: the present invention uploads the abnormal guidance map to the cloud account corresponding to the new energy vehicle, automatically backs up the abnormal data of the vehicle to facilitate subsequent abnormal data query, and also provides a reliable basis for the subsequent maintenance of the new energy vehicle, and determines whether the vehicle control display screen is operating normally; if so, the abnormal guidance map is sent to the vehicle control display screen for display; if not, the abnormal guidance map is automatically sent to the associated mobile terminal to ensure that when the vehicle display screen cannot work normally, the driver can also know the vehicle fault location in time and quickly take correct emergency treatment measures.

[0112] Embodiment 8:

[0113] On the basis of Example 6, the vehicle power circuit structure diagram not only marks the fault position, but also includes:

[0114] Based on a preset fault level table, determine the fault risk level corresponding to the fault mark position;

[0115] When the fault risk level is greater than or equal to the preset level, a stop point query is performed based on the navigation map to determine the safe stop point closest to the new energy vehicle, and an emergency stop instruction is sent to the new energy vehicle, and a temporary navigation guide is generated based on the safe stop point;

[0116] When the fault risk level is lower than the preset level, the urgency of fault handling at the fault mark location is determined based on the fault risk level combined with the current actual environment data;

[0117] When the fault mark position needs to be processed immediately, the fault cause of the current fault mark position is inferred according to the abnormal node and big data analysis to obtain the predicted fault cause, and the maintenance point query is performed based on the navigation map and the predicted fault cause. Based on the principle of proximity, the best maintenance point is recommended to the new energy vehicle;

[0118] When the fault mark position does not need to be processed immediately, the fault warning is issued after the driver arrives at the destination.

[0119] In this embodiment, the preset fault level table includes all circuit abnormality locations and their corresponding risk levels. The higher the fault risk level, the higher the risk of an accident and the higher the urgency of fault handling. Different fault risk levels correspond to different urgency of fault handling.

[0120] The fault risk level is associated with the current actual environmental data (i.e., the current outdoor environment's light intensity). For example, when the vehicle is traveling in an environment with high light intensity, if the headlights have an abnormality, the fault risk level is low, and the driver can be allowed to find a repair point for repairs after completing the current journey. If the vehicle is traveling in an environment with low light intensity, if the headlights have an abnormality, the fault risk level is high, and the driver is not allowed to continue driving and must stop at a safe stop.

[0121] In this embodiment, predicting the cause of the fault refers to determining the corresponding cause of the fault of the vehicle having the same abnormal node according to big data analysis.

[0122] In this embodiment, when there are multiple abnormal nodes, driving guidance is provided to the new energy vehicle according to the fault risk level corresponding to the abnormal node with the highest fault risk level.

[0123] The beneficial effects of the above technical solution are as follows: based on the preset fault level table, the fault risk level corresponding to the fault mark position is determined, so as to handle the faults corresponding to different fault risk levels, effectively improving the driving safety of new energy vehicles while maximally ensuring that the faulty vehicle does not affect the passage of other vehicles. When the fault risk level is greater than or equal to the preset level, a stop point query is performed based on the navigation map to determine the safest stop point closest to the new energy vehicle, and an emergency stop instruction is sent to the new energy vehicle to ensure that high-risk anomalies can immediately attract the driver's attention in a short time, and generate temporary navigation guidance based on the safe stop point to ensure that vehicles with serious abnormal problems can quickly pull over and reduce the probability of accidents involving abnormal vehicles; when the fault risk level is less than the preset level, based on the fault risk level, In combination with the current actual environmental data, the urgency of fault handling at the fault marked position is determined; when the fault marked position needs to be handled immediately, the fault cause of the current fault marked position is inferred according to the abnormal node and big data analysis to obtain the predicted fault cause, and a maintenance point query is performed based on the navigation map and the predicted fault cause. Based on the principle of proximity, the best maintenance point is recommended to the new energy vehicle to ensure that low-risk vehicles can leave the road in time to find a maintenance point and get repaired in time, while maximizing the guarantee that the faulty vehicle does not affect the passage of other vehicles; when the fault marked position does not need to be handled immediately, a fault warning is issued after the driver arrives at the destination to ensure that the low-risk vehicle can complete the driver's travel plan while supervising the driver to repair the low-risk abnormal node in time.

[0124] Embodiment 9:

[0125] On the basis of Example 8, generating temporary navigation guidance based on the safe stop point also includes:

[0126] Based on the fault mark position, determine whether the abnormal node will affect the braking system of the new energy vehicle. If so, determine that the current vehicle is at risk of losing control. If the new energy vehicle does not move according to the temporary navigation instructions, send a risk vehicle warning to the road management personnel;

[0127] Otherwise, continue to recommend safe stopping points to the new energy vehicle until it stops.

[0128] The beneficial effects of the above technical solution are as follows: the present invention determines whether the abnormal node will affect the braking system of the new energy vehicle based on the fault mark position. If it does, it is determined that the current vehicle is at risk of losing control. If the new energy vehicle does not move according to the temporary navigation instructions, a risk vehicle warning is sent to road management personnel to remind road management personnel to promptly evacuate vehicles and people on the road where the risk vehicle is located, which is conducive to controlling the scale of vehicle accidents within a certain range; otherwise, safe parking points are continuously recommended to the new energy vehicle until it stops, so as to provide the best parking position for the abnormal vehicle at all times and reduce the probability of accidents involving vehicles with abnormal circuits.

[0129] Embodiment 10:

[0130] The present invention provides a new energy vehicle power circuit node abnormality identification and early warning system, such as Figure 5 As shown, including:

[0131] A working circuit determination module is used to generate a current working power circuit diagram of the new energy vehicle based on the working data of the new energy vehicle and the power circuit structure diagram of the whole vehicle;

[0132] A circuit abnormality judgment module is used to obtain the loop current corresponding to the power battery of the new energy vehicle, and judge whether the loop current is within the predicted current range, obtain a judgment result, and judge whether there is an abnormality in the power circuit of the new energy vehicle according to the judgment result;

[0133] An abnormal node determination module is used to obtain the working voltage of each monitored circuit device in the current working power circuit diagram respectively when it is determined that the power circuit of the new energy vehicle is abnormal, perform intelligent power consumption analysis on the current working power circuit diagram based on the working voltage, and determine the abnormal node of the power circuit of the new energy vehicle according to the power consumption analysis result;

[0134] The circuit abnormality warning module is used to generate a power circuit warning voice based on the abnormal node, and generate an abnormality guide map for display on the vehicle control display screen.

[0135] The beneficial effects of the above technical solution are as follows: based on the working data of the new energy vehicle and the power circuit structure diagram of the whole vehicle, the present invention generates the current working power circuit diagram of the new energy vehicle, visualizes the working circuit of the new energy vehicle, then obtains the loop current corresponding to the power battery of the new energy vehicle, and judges whether the loop current is within the predicted current range to obtain a judgment result. According to the judgment result, it is judged whether there is an abnormality in the power circuit of the new energy vehicle, and a preliminary judgment on the abnormality of the whole circuit of the new energy vehicle is completed. When it is determined that there is an abnormality in the power circuit of the new energy vehicle, the working voltage of each monitored circuit device in the current working power circuit diagram is obtained respectively, and the current working power circuit diagram is intelligently analyzed based on the working voltage. According to the power analysis result, the abnormal node of the power circuit of the new energy vehicle is determined, and the microscopic identification of the abnormal circuit of the new energy vehicle is realized, and the abnormal position of the circuit is determined in time. Finally, based on the abnormal node, a power circuit warning voice is generated to complete the circuit warning of the new energy vehicle, and an abnormal guide map is generated to be displayed on the vehicle control display screen, which is conducive to vehicle maintenance personnel to quickly determine the problem location in the process of repairing the abnormal circuit, and improve the maintenance efficiency of the new energy vehicle circuit.

[0136] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for identifying and warning abnormalities of power circuit nodes of new energy vehicles, characterized in that: include: Step 1: Based on the working data of the new energy vehicle and its vehicle power circuit structure diagram, generate the current working power circuit diagram of the new energy vehicle; Step 2: Obtain the loop current corresponding to the power battery of the new energy vehicle, and determine whether the loop current is within the predicted current range, obtain a determination result, and determine whether there is an abnormality in the power circuit of the new energy vehicle according to the determination result; Step 3: When it is determined that the power circuit of the new energy vehicle is abnormal, the operating voltage of each monitored circuit component in the current working power circuit diagram is obtained respectively, and the current working power circuit diagram is intelligently analyzed for power consumption based on the operating voltage, and the abnormal node of the power circuit of the new energy vehicle is determined according to the power consumption analysis result; Step 4: Based on the abnormal node, a power circuit warning voice is generated, and an abnormal guidance diagram is generated and displayed on the vehicle control display screen; Wherein, step 1 includes: Determine the operating functions of new energy vehicles based on the working data of new energy vehicles; According to the corresponding relationship between the operating function and the power circuit, determine the power circuit sub-circuit currently running in the new energy vehicle; The currently running power circuit sub-circuit is highlighted on the whole vehicle power circuit structure diagram of the new energy vehicle to generate the current working power circuit diagram; Wherein, step 2 includes: Obtain the resistance change characteristics corresponding to each electrical device in the power circuit of the new energy vehicle respectively, and determine the normal resistance floating range of each electrical device during operation based on the resistance change characteristics; Based on the current working power circuit diagram, determine the current operating electrical components; According to the normal resistance floating range corresponding to the currently operating electrical components and the connection relationship corresponding to each currently operating electrical component in the current working power circuit diagram, the internal resistance value of the current working power circuit is evaluated to obtain the predicted range of the circuit internal resistance; Based on the predicted range of the current circuit internal resistance and the supply voltage of the new energy vehicle battery to the current working power circuit, the predicted current range is obtained; Determining whether the loop current is within the predicted current range, and if so, determining that the power circuit of the new energy vehicle is normal; Otherwise, it is determined that there is an abnormality in the power circuit of the new energy vehicle; Wherein, step 3 includes: Obtain the working voltage of each monitored circuit device in the current working power circuit diagram; Determining whether the operating voltage is within the rated operating range, and if not, determining that an abnormality exists in the power circuit sub-circuit corresponding to the monitored circuit device; If yes, then obtain the current working current corresponding to the monitored circuit device, and if the current working current is within the standard range corresponding to the monitored circuit device, then determine that the power circuit sub-loop corresponding to the monitored circuit device is normal; If the current operating current is not within the standard range corresponding to the monitored circuit device, the monitored circuit device is regarded as an abnormal circuit node; Wherein, when it is determined that the power circuit sub-loop corresponding to the monitored circuit device has an abnormality, it includes: Obtaining an associated circuit node corresponding to the monitored circuit device, and obtaining abnormality judgment results corresponding to all target monitored circuit devices connected to the associated circuit node; When the abnormality judgment results corresponding to all target monitored circuit devices are abnormal, it is determined that there is an abnormality in the connection line between the associated circuit node and the target monitored circuit device, and the associated circuit node is an abnormal circuit node; Otherwise, based on a variety of preset circuit analysis methods, the power circuit sub-loop corresponding to the monitored circuit device is analyzed to determine the abnormal circuit node; Wherein, step 4 includes: Based on the vehicle power circuit structure diagram, determine the position of the abnormal circuit node in the new energy vehicle architecture, and generate a power circuit warning voice according to the corresponding electrical components of the position; Circuit fault warning is carried out through the speakers of new energy vehicles. Based on the position determination results, the fault location is marked on the vehicle power circuit structure diagram, and an abnormal guidance diagram of the new energy vehicle power circuit is generated and sent to the vehicle control display screen for display.

2. A method for identifying and warning abnormalities of power circuit nodes of new energy vehicles according to claim 1, characterized in that: Generate an abnormal guidance diagram of the power circuit of a new energy vehicle and send it to the vehicle control display screen for display, including: Upload the abnormal guidance map to the cloud account corresponding to the new energy vehicle at the same time, and judge whether the vehicle control display screen is operating normally; If yes, the abnormal guidance map is sent to the vehicle control display screen for display; If not, the abnormal guidance map is automatically sent to the associated mobile terminal.

3. A method for identifying and warning abnormalities of power circuit nodes of new energy vehicles according to claim 1, characterized in that: The vehicle power circuit structure diagram not only marks the fault location, but also includes: Based on a preset fault level table, determine the fault risk level corresponding to the fault mark position; When the fault risk level is greater than or equal to the preset level, a stop point query is performed based on the navigation map to determine the safe stop point closest to the new energy vehicle, and an emergency stop instruction is sent to the new energy vehicle, and a temporary navigation guide is generated based on the safe stop point; When the fault risk level is lower than the preset level, the urgency of fault handling at the fault mark location is determined based on the fault risk level combined with the current actual environment data; When the fault mark position needs to be processed immediately, the fault cause of the current fault mark position is inferred according to the abnormal node and big data analysis to obtain the predicted fault cause, and the maintenance point query is performed based on the navigation map and the predicted fault cause. Based on the principle of proximity, the best maintenance point is recommended to the new energy vehicle; When the fault mark position does not need to be processed immediately, the fault warning is issued after the driver arrives at the destination.

4. A method for identifying and warning abnormalities of power circuit nodes of new energy vehicles according to claim 3, characterized in that: Generates temporary navigation guidance based on safe stopping points, including: Based on the fault mark position, determine whether the abnormal node will affect the braking system of the new energy vehicle. If so, determine that the current vehicle is at risk of losing control. If the new energy vehicle does not move according to the temporary navigation instructions, send a risk vehicle warning to the road management personnel; Otherwise, continue to recommend safe stopping points to the new energy vehicle until it stops.

5. A new energy vehicle power circuit node abnormality identification and early warning system, used to implement a new energy vehicle power circuit node abnormality identification and early warning method as described in any one of claims 1 to 4, characterized in that: include: A working circuit determination module is used to generate a current working power circuit diagram of the new energy vehicle based on the working data of the new energy vehicle and the power circuit structure diagram of the whole vehicle; A circuit abnormality judgment module is used to obtain the loop current corresponding to the power battery of the new energy vehicle, and judge whether the loop current is within the predicted current range, obtain a judgment result, and judge whether there is an abnormality in the power circuit of the new energy vehicle according to the judgment result; An abnormal node determination module is used to obtain the working voltage of each monitored circuit device in the current working power circuit diagram respectively when it is determined that the power circuit of the new energy vehicle is abnormal, perform intelligent power consumption analysis on the current working power circuit diagram based on the working voltage, and determine the abnormal node of the power circuit of the new energy vehicle according to the power consumption analysis result; The circuit abnormality warning module is used to generate a power circuit warning voice based on the abnormal node, and generate an abnormality guide map for display on the vehicle control display screen.

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