A method, device and system for monitoring the status of high-current terminals of new energy vehicles

Abstract

The present invention relates to the field of new energy vehicles, and specifically to a state monitoring method, device and system for high-current terminals of new energy vehicles, including: controlling a performance detection device to conduct a power-on test on a high-current terminal to be detected, and obtaining measurement data within a detection period; obtaining a state parameter set of the high-current terminal to be detected in the detection period according to the measurement data and preset standard data corresponding to the high-current terminal to be detected; traversing the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters; analyzing the abnormal state parameters and the first detection order corresponding to the abnormal state parameters, and determining the abnormal state parameters that meet the preset abnormal requirements as target abnormal state parameters; and determining the target performance quality of the high-current terminal to be detected according to the target abnormal state parameters. The present invention improves the accuracy and detection speed of state monitoring of high-current terminals.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a method, device and system for monitoring the status of a high-current terminal of a new energy vehicle. Background Art

[0002] In the field of new energy vehicles, high-current terminals are key components that connect high-voltage power supplies to electrical equipment. The stability and reliability of their performance are crucial to the safe operation of the entire electric vehicle. However, due to long-term exposure to high current and high voltage, high-current terminals may experience performance degradation, resulting in increased contact resistance, abnormal temperature rise, and other problems, affecting the normal use and safety of the vehicle. In order to ensure the performance quality of high-current terminals, they need to be regularly monitored and evaluated.

[0003] Traditional monitoring methods usually rely on manual inspections to evaluate the status of high-current terminals through regular physical inspections and simple electrical tests. These methods are often time-consuming and not accurate enough to monitor the performance changes of terminals in real time. In addition, the existing performance evaluation standards are not detailed enough to provide specific evaluation indicators for different types of abnormal conditions, resulting in subjectivity and uncertainty in the evaluation results. Summary of the invention

[0004] In order to solve the technical problem of accurately finding the abnormal state of the high-current terminal in the new energy vehicle and analyzing the abnormal cause, and avoiding the failure of the new energy vehicle caused by the high-current terminal problem, the purpose of the present invention is to provide a state monitoring method, device and system for the high-current terminal of the new energy vehicle, and the technical scheme adopted is as follows:

[0005] In a first aspect, an embodiment of the present invention provides a state monitoring method for a high-current terminal of a new energy vehicle, which is applied to a state monitoring system for a high-current terminal of a new energy vehicle, wherein the state monitoring system for a high-current terminal of a new energy vehicle includes a performance detection device, and the method includes:

[0006] Control the performance detection device to conduct a power-on test on the high-current terminal to be detected, and obtain measurement data within the detection cycle;

[0007] According to the measurement data and the preset standard data corresponding to the high-current terminal to be detected, a state parameter set of the high-current terminal to be detected in the detection period is obtained, wherein the state parameter set includes a plurality of state parameters in the detection period, and any two of the plurality of state parameters are in an adjacent order;

[0008] Traversing the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters;

[0009] Analyze the abnormal state parameters and the first detection order corresponding to the abnormal state parameters, and determine that the abnormal state parameters that meet the preset abnormal requirements are target abnormal state parameters;

[0010] The target performance quality of the high-current terminal to be detected is determined according to the target abnormal state parameter.

[0011] In combination with the first aspect, in a possible implementation, the measurement data includes a current value and a temperature rise value, the preset standard data includes a preset standard current value and a preset standard temperature rise value, and the state parameter set of the high current terminal to be detected in the detection cycle is obtained based on the measurement data and the preset standard data corresponding to the high current terminal to be detected, including: obtaining the current value and temperature rise value at each detection in the detection cycle; obtaining the preset standard current value and preset standard temperature rise value corresponding to the high current terminal to be detected; according to a first preset formula, calculating the ratio between the current value, the temperature rise value and the preset standard current value, the preset standard temperature rise value, to obtain the state parameter at each detection in the detection cycle; sorting the state parameters according to the detection order in the detection cycle to obtain the state parameter set of the high current terminal to be detected in the detection cycle, the state parameter set including multiple state parameters in the detection cycle, and the state parameters in the multiple state parameters are in adjacent order.

[0012] In combination with the first aspect, in a possible implementation method, traversing the state parameter set to obtain abnormal state parameters and the first detection order corresponding to the abnormal state parameters includes: obtaining any sequence in the state parameter set, the sequence consisting of state parameters corresponding to three adjacent orders, and each state parameter corresponds to a detection order; calculating the state parameters in the sequence according to a second preset formula to obtain the difference coefficient of the middle order in the sequence; traversing all sequences in the state parameter set to obtain multiple difference coefficients, each of the multiple difference coefficients corresponding to a different detection order; screening the multiple difference coefficients to obtain a target difference coefficient; and according to the target difference coefficient, obtaining the first detection order corresponding to the target difference coefficient and the abnormal state parameter corresponding to the first detection order.

[0013] In combination with the first aspect, in a possible implementation method, the screening of the multiple difference coefficients to obtain a target difference coefficient includes: calculating the multiple difference coefficients respectively according to a third preset formula to obtain a plurality of calculated difference coefficients; comparing the multiple calculated difference coefficients with a first preset abnormality threshold to obtain a target difference coefficient, wherein the target difference coefficient is a calculated difference coefficient that is greater than the first preset abnormality threshold.

[0014] In combination with the first aspect, in a possible implementation method, the analyzing the abnormal state parameter and the first detection order corresponding to the abnormal state parameter to determine the abnormal state parameter that meets the preset abnormal requirements as the target abnormal state parameter includes: determining the target measurement data at the first detection order according to the first detection order corresponding to the abnormal state parameter; calculating the target difference coefficient corresponding to the abnormal state parameter and the target measurement data according to a fourth preset formula to obtain the abnormal value corresponding to the first detection order; comparing the abnormal value with a second preset abnormal threshold to obtain the abnormal state parameter that meets the preset abnormal requirements as the target abnormal state parameter, and the preset abnormal requirement is that the abnormal value is less than the second preset abnormal threshold.

[0015] In combination with the first aspect, in a possible implementation, the measurement data includes a current value and a voltage value, and determining the target measurement data at the first detection order according to the first detection order corresponding to the abnormal state parameter includes: obtaining the current value and the voltage value corresponding to the first detection order according to the first detection order corresponding to the abnormal state parameter; calculating the current value and the voltage value to obtain the resistance value corresponding to the first detection order; and performing data processing on the resistance value to obtain the target measurement data.

[0016] In combination with the first aspect, in a possible implementation method, determining the target performance quality of the high current terminal to be detected based on the target abnormal state parameter includes: obtaining a target detection order corresponding to the target abnormal state parameter; counting the number of target detection orders to obtain a total number of abnormal times; obtaining the total number of detections within the detection cycle; calculating the ratio of the total number of abnormal times to the total number of detections to obtain a target ratio; and determining the target performance quality of the high current terminal to be detected based on the target ratio.

[0017] In combination with the first aspect, in a possible implementation method, determining the target performance quality of the high current terminal to be detected based on the target ratio includes: when the target ratio is greater than or equal to a first preset ratio threshold, determining that the target performance quality of the high current terminal to be detected is the first performance quality; when the target ratio is less than the first preset ratio threshold and greater than or equal to a second preset ratio threshold, determining that the target performance quality of the high current terminal to be detected is the second performance quality; when the target ratio is less than the second preset ratio threshold, determining that the target performance quality of the high current terminal to be detected is the third performance quality.

[0018] In a second aspect, an embodiment of the present invention provides a state monitoring system for high-current terminals of new energy vehicles, including a performance detection device; the performance detection device is used to control the performance detection device to perform a power-on test on the high-current terminal to be detected, and obtain measurement data within a detection period; the performance detection device is also used to obtain a state parameter set of the high-current terminal to be detected in the detection period according to the measurement data and the preset standard data corresponding to the high-current terminal to be detected, the state parameter set including multiple state parameters in the detection period, and the multiple state parameters are in an adjacent order; the performance detection device is also used to traverse the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters; the performance detection device is also used to analyze the abnormal state parameters and the first detection order corresponding to the abnormal state parameters, and determine that the abnormal state parameters that meet the preset abnormal requirements are target abnormal state parameters; the performance detection device is also used to determine the target performance quality of the high-current terminal to be detected based on the target abnormal state parameters.

[0019] In a third aspect, a computer device is provided, comprising a memory and a processor, wherein the memory is connected to the processor, and the processor is used to execute one or more computer programs stored in the memory. When the processor executes the one or more computer programs, the computer device implements the state monitoring method of high-current terminals of new energy vehicles as described in the first aspect.

[0020] In a fourth aspect, an embodiment of the present invention provides a state monitoring device for a high-current terminal of a new energy vehicle, which is applied to a state monitoring system for a high-current terminal of a new energy vehicle. The state monitoring system for a high-current terminal of a new energy vehicle includes a performance detection device, and the device includes:

[0021] A control unit, used for controlling the performance detection device to conduct a power-on test on the high current terminal to be detected, and obtaining measurement data within a detection cycle;

[0022] A determination unit, configured to obtain a state parameter set of the high-current terminal to be detected in the detection period according to the measurement data and preset standard data corresponding to the high-current terminal to be detected, wherein the state parameter set includes a plurality of state parameters in the detection period, and any two of the plurality of state parameters are in an adjacent order;

[0023] The determining unit is further used to traverse the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters;

[0024] an analyzing unit, configured to analyze the abnormal state parameter and the first detection order corresponding to the abnormal state parameter, and determine the abnormal state parameter that meets the preset abnormal requirement as the target abnormal state parameter;

[0025] The determining unit is further configured to determine a target performance quality of the high-current terminal to be detected according to the target abnormal state parameter.

[0026] In a fifth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the state monitoring method for high-current terminals of new energy vehicles as described in the first aspect.

[0027] The present invention has the following beneficial effects: by conducting a power-on test on the high-current terminal to be detected, accurate measurement data can be obtained, thereby improving the accuracy of performance detection, and by continuously obtaining measurement data within the detection cycle, the state of the high-current terminal can be monitored in real time, and potential performance problems can be discovered in time; further, by comparing the measurement data with preset standard data, a state parameter set is obtained, which helps to more comprehensively understand the performance of the high-current terminal within the detection cycle, and by traversing the state parameter set, abnormal state parameters and their corresponding detection order can be quickly identified, which helps to discover abnormal situations in time; further, by analyzing the abnormal state parameters, it is possible to accurately determine which abnormal state parameters are target abnormal state parameters, thereby conducting more targeted abnormal state troubleshooting, and finally, based on the target abnormal state parameters, the performance quality of the high-current terminal to be detected can be evaluated to ensure the quality and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic flow chart of a method for monitoring the state of a high-current terminal of a new energy vehicle provided by an embodiment of the present invention;

[0030] Figure 2 A schematic structural diagram of a state monitoring device for a high-current terminal of a new energy vehicle provided by an embodiment of the present invention.

[0031] Figure 3 A schematic diagram of the structure of a computer device provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the state monitoring method of a high-current terminal of a new energy vehicle proposed by the present invention, its specific implementation method, structure, characteristics and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0033] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0034] The present invention is described in detail below through specific embodiments.

[0035] An embodiment of the present invention provides a state monitoring system for a high current terminal of a new energy vehicle, wherein the state monitoring system for a high current terminal of a new energy vehicle includes a performance detection device. In addition, the state monitoring system for a high current terminal of a new energy vehicle also includes a data acquisition unit, a central processing unit (CPU), a user interface (UI), and other components.

[0036] Among them, the new energy vehicle high current terminal status monitoring system is a system specially designed to monitor and evaluate the status of high current terminals in new energy vehicles. Through advanced performance testing equipment and precise analysis methods, the system can accurately detect the working performance of the current terminals and promptly detect any abnormal conditions that may exist.

[0037] The above-mentioned performance testing equipment is the core part of the system, which may include but is not limited to current sensors, voltage sensors, temperature sensors, etc., and is used to collect real-time physical parameter data such as current, voltage and temperature of high current terminals during power-on testing. Performance testing equipment usually has high precision and high stability to ensure that the collected data is accurate and reliable.

[0038] The data acquisition unit is responsible for converting the analog signals collected from the performance detection equipment into digital signals and transmitting them to the central processing unit.

[0039] The central processing unit (CPU) is responsible for receiving, processing and analyzing the collected data. It runs specially designed monitoring software that can analyze the data in real time and identify abnormal conditions.

[0040] The user interface (UI) allows operators to interact with the system, view real-time data, history, alarm information, and configure the system.

[0041] Furthermore, when an abnormal condition is detected, the system will send an audible or visual alarm or notification to the maintenance personnel's equipment to ensure that maintenance measures are taken in a timely manner.

[0042] It can be seen that through the collaborative work of these key components, the condition monitoring system of high-current terminals of new energy vehicles can achieve efficient and accurate condition monitoring and performance evaluation, thereby providing maintenance personnel with timely, data-driven decision support to ensure the safe and reliable operation of high-current terminals of new energy vehicles.

[0043] The specific scheme of the state monitoring method of a high current terminal of a new energy vehicle provided by the present invention is described in detail below with reference to the accompanying drawings.

[0044] See also Figure 1 , which shows a schematic flow chart of a state monitoring method for a high-current terminal of a new energy vehicle provided by an embodiment of the present invention, and is applied to a state monitoring system for a high-current terminal of a new energy vehicle, wherein the state monitoring system for a high-current terminal of a new energy vehicle includes a performance detection device, and the method includes the following steps:

[0045] S10, controlling the performance detection device to conduct a power-on test on the high current terminal to be detected, and obtaining measurement data within a detection cycle.

[0046] Among them, before controlling the performance detection equipment to conduct a power-on test on the high-current terminal to be tested, it is necessary to install the performance detection equipment in the state monitoring system of the high-current terminal of the new energy vehicle. The specific implementation steps are: on the detection platform, high-precision voltage and current sensors are placed to measure the current and voltage of the high-current terminal when the high-current terminal is powered on. Check whether the high-current terminal detection equipment is intact and ensure that all components such as high-precision voltage and current sensors, temperature sensors, etc. are properly installed and calibrated. At the same time, check and confirm that all safety measures are in place, such as grounding protection, emergency stop button, etc., to ensure the safety of the test process. Place the high-current terminal to be tested on the test bench and fix it to ensure that the installation is stable before energizing the high-current terminal. At the same time, connect the high-precision voltage and current sensors on both sides of the high-current terminal, or during the test, contact the temperature sensor with the high-current terminal to obtain the temperature change of the high-current terminal during the test, thereby obtaining the test data during the detection process.

[0047] Among them, the system first needs to accurately control the performance testing equipment to ensure that the equipment can perform power-on tests on the high-current terminals to be tested according to the predetermined procedures and parameters. The specific implementation steps are: the first step is to set the corresponding test current, voltage and other parameters according to the specifications of the high-current terminals and the purpose of the test to ensure that the test can cover the normal working range of the terminals and possible extreme conditions. It should be noted that when the power is first turned on, the first power-on current of the high-current terminal to be tested is set to 50A to ensure that the effect of the high-current terminal in actual use is more reliable; the second step is to start the power-on test, and the performance testing equipment will power on the high-current terminals according to the set parameters. During this process, the performance testing equipment will monitor the response of the terminal in real time, including key indicators such as the flow of current, changes in voltage, and temperature rise.

[0048] For example, in a power-on test, the high-current terminals are tested multiple times within the test cycle. Each test lasts 30 minutes, and a test is performed every 15 minutes. Each time the test is stopped, the high-current terminals are removed from the test device and reinstalled during the test, simulating the plugging and unplugging process of the high-current terminals. A total of n tests are performed, and the measurement data during the test cycle is recorded.

[0049] The test data may include but are not limited to current value, voltage value, temperature rise (ΔT) and timestamp, and the timestamp records the time of each data point so as to analyze the trend over time.

[0050] The test data is recorded in the detection cycle, that is, there will be corresponding test data for each detection process in the detection cycle. The test data is saved in the detection order and has a corresponding detection order identifier.

[0051] It can be seen that in this embodiment, by controlling the performance detection device to perform a power-on test on the high-current terminal to be detected, scientific and accurate measurement data can be provided for the state monitoring method of the high-current terminal of the new energy vehicle.

[0052] S20. According to the measurement data and the preset standard data corresponding to the high-current terminal to be detected, a state parameter set of the high-current terminal to be detected in the detection cycle is obtained, wherein the state parameter set includes multiple state parameters in the detection cycle, and each of the multiple state parameters is in an adjacent order.

[0053] The preset standard data is a pre-set performance standard for the high current terminal to be tested, which is usually based on the manufacturer's technical specifications, industry standards and safety requirements. The preset standard data may include but is not limited to standard current values, voltage values, maximum allowable temperature rise, etc.

[0054] For example, the basic performance requirements of high-current terminal products are as follows: the current carrying capacity must be able to meet 40A or above and the temperature rise capacity must be guaranteed to be within 55K, which is used as the minimum production standard for high-current terminals. Therefore, when the measured data is the current value, the preset standard data is to meet 40A or above, and when the measured data is the temperature rise value, the preset standard data is to be guaranteed to be within 55K. When the preset standard data of the high-current terminal are met at the same time, it is used as the minimum production standard for the high-current terminal.

[0055] The above-mentioned state parameters reflect the performance state of the high-current terminal at each detection moment.

[0056] Specifically, for each detection moment in the detection cycle, the ratio or difference between the actual measured value and the standard value is calculated to obtain the state parameters of the high current terminal at each detection, for example, the ratio of the actual current to the standard current, or the difference between the actual temperature rise and the standard temperature rise is calculated.

[0057] The above-mentioned state parameter set is formed by arranging the state parameters obtained from each detection in the detection order. That is, in the entire detection cycle, the continuous analysis of the measurement data in the detection order will generate the state parameters corresponding to the detection order, and these state parameters together constitute the state parameter set. The state parameter set fully describes the performance state of the terminal in the entire detection cycle.

[0058] Specifically, the multiple state parameters in the state parameter set are arranged according to the actual detection order in the detection cycle. For example, if there are three detections in the detection cycle, the state parameter set will contain three state parameters, corresponding to the first, second and third detections respectively.

[0059] The above adjacent order means that in the state parameter set, each state parameter is adjacent to its previous and next state parameters in the detection order. This means that if there are n detections in a detection cycle, the i-th state parameter will be adjacent to the i-1th and i+1th state parameters (for the 1st and Nth state parameters, they each have only one adjacent state parameter).

[0060] It can be seen that in this embodiment, the performance status of the high current terminal can be monitored in real time through the state parameter set and its adjacent order relationship, which is conducive to subsequent accurate analysis of the performance of the high current terminal.

[0061] S30, traversing the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters.

[0062] The traversal process is that the system checks each state parameter in the state parameter set one by one to determine whether there is an abnormality.

[0063] Among them, the abnormal state parameters can be obtained by comparing the state parameters detected in the adjacent detection order. , obtain the state parameters detected by the adjacent detection sequence of the high current terminal The difference between them can be used to determine the abnormal state parameters.

[0064] Specifically, if the state parameters detected in the adjacent detection order are If the difference between the values ​​is close, the high current terminal is tested and all the test sequences are normal. If the state parameters detected in the adjacent test sequences are If the difference between them is not close, that is, it shows significant fluctuation or difference, then the test result is abnormal, and the abnormal state parameter is obtained, and the abnormal state parameter is obtained. Check the detection order in the , and determine which detection order has the abnormality.

[0065] Among them, the abnormal state parameter indicates an abnormal state parameter, but the occurrence of this abnormality may be in various situations, such as a connection problem between the high current terminal and the test interface, an abnormal state resulting in poor contact, or an abnormality caused by factors of the high current terminal itself. Further abnormality judgment is based on subsequent abnormality analysis.

[0066] It can be seen that in this embodiment, by analyzing the difference in state parameters between adjacent detection sequences, it is possible to more accurately identify when the high current terminal begins to show possible performance degradation or fault signs, and then the abnormal detection sequence and corresponding abnormal state parameters can be obtained, which is convenient for subsequent abnormal analysis.

[0067] S40, analyzing the abnormal state parameters and the first detection order corresponding to the abnormal state parameters, and determining the abnormal state parameters that meet the preset abnormal requirements as target abnormal state parameters.

[0068] The preset abnormal requirement may be one or more preset abnormal requirements, which are mainly formulated based on the specifications of the equipment manufacturer, historical data analysis, industry standards or equipment use experience, etc. The preset abnormal requirements are intended to define what kind of abnormal state parameters are worthy of special attention, which may cause serious equipment failure or performance degradation.

[0069] Among them, the abnormal state parameters mentioned in S30 represent abnormal state parameters, but the occurrence of this abnormality may be in various situations, such as a connection problem between the high current terminal and the test interface, resulting in an abnormal state of poor contact, or an abnormality caused by factors of the high current terminal itself. Further abnormality judgment must be based on subsequent abnormality analysis.

[0070] Furthermore, the target abnormal state parameter represents an important abnormal state parameter that meets the preset abnormal requirements, that is, an abnormality caused by the high current terminal itself, rather than an abnormal state caused by a poor contact due to a connection problem between the high current terminal and the test interface.

[0071] It can be seen that in this embodiment, by analyzing the abnormal state parameters and the corresponding first detection order, and determining the abnormal state parameters that meet the preset abnormal requirements as the target abnormal state parameters, it is possible to remove the abnormal state conditions detected by the high-current terminals due to poor contact during the detection process, and then truly identify the abnormalities caused by the high-current terminals themselves, thereby improving the accuracy of the state monitoring method for high-current terminals of new energy vehicles.

[0072] S50. Determine a target performance quality of the high-current terminal to be detected according to the target abnormal state parameter.

[0073] The target performance quality can be determined by analyzing factors such as the frequency, severity and duration of abnormal state detection parameters to determine whether the quality of the high-current terminal to be detected is qualified and the degree of qualification.

[0074] Specifically, the target performance qualities may be classified into different categories or levels. For example, a high current terminal to be inspected may be considered to be in good, fair, or poor condition.

[0075] It can be seen that in this embodiment, according to the analysis and evaluation of the target abnormal state parameters, the target performance quality of each high current terminal to be detected can be obtained. The target performance quality helps maintenance personnel or decision makers make decisions to maintain or replace high current terminals. For example, if the performance quality of the high current terminal drops to an unacceptable level, it may need to be replaced to avoid potential safety risks.

[0076] The present invention has the following beneficial effects: by conducting a power-on test on the high-current terminal to be detected, accurate measurement data can be obtained, thereby improving the accuracy of performance detection, and by continuously obtaining measurement data within the detection cycle, the state of the high-current terminal can be monitored in real time, and potential performance problems can be discovered in time; further, by comparing the measurement data with preset standard data, a state parameter set is obtained, which helps to more comprehensively understand the performance of the high-current terminal within the detection cycle, and by traversing the state parameter set, abnormal state parameters and their corresponding detection order can be quickly identified, which helps to discover abnormal situations in time; further, by analyzing the abnormal state parameters, it is possible to accurately determine which abnormal state parameters are target abnormal state parameters, thereby conducting more targeted abnormal state troubleshooting, and finally, based on the target abnormal state parameters, the performance quality of the high-current terminal to be detected can be evaluated to ensure the quality and reliability of the product.

[0077] In one embodiment, the measurement data includes a current value and a temperature rise value, the preset standard data includes a preset standard current value and a preset standard temperature rise value, and the state parameter set of the high current terminal to be detected in the detection cycle is obtained based on the measurement data and the preset standard data corresponding to the high current terminal to be detected, including: obtaining the current value and temperature rise value at each detection in the detection cycle; obtaining the preset standard current value and preset standard temperature rise value corresponding to the high current terminal to be detected; according to a first preset formula, calculating the ratio between the current value, the temperature rise value and the preset standard current value, the preset standard temperature rise value, to obtain the state parameter at each detection in the detection cycle; sorting the state parameters according to the detection order in the detection cycle to obtain the state parameter set of the high current terminal to be detected in the detection cycle, the state parameter set including multiple state parameters in the detection cycle, and the state parameters in the multiple state parameters are in adjacent order.

[0078] Among them, the first preset formula is as follows:

[0079]

[0080] In the formula Indicates During the first test, the state parameters of the high current terminal during the power-on time, The subscript representing the detection order of the high current terminal, n is the total number of high current terminal detections; Indicates the minimum standard value for high current terminals. Indicates high current terminal The actual current when the detection is performed. Indicates high current terminal The temperature rise value during the first test is Indicates the maximum value of the standard temperature rise when a high current terminal is energized.

[0081] in, Indicates the lowest standard value of the high current terminal, representing the minimum current that the high current terminal can handle. It is a standard value, so it will never be zero. Indicates high current terminal The temperature rise value during the first test is a real measurement value and will not be zero unless there is no temperature rise at all.

[0082] In the first preset formula, It is the difference between the ratio of the actual measured value to the minimum standard value and 1. The larger the value is, the better the performance of the high current detection terminal is, and vice versa. The maximum value of the standard temperature rise during the period of power on the high current terminal is The ratio of the temperature rise value during the first test. The larger the value, the better the performance of the high current terminal, and vice versa. The product of the difference between the ratio of the actual measured value to the minimum standard value and 1 and the ratio of the maximum value of the standard temperature rise value during the power-on period of the large current terminal to the temperature rise value of the large current terminal during the i-th detection. The larger the value, the better the performance of the large current terminal, and vice versa.

[0083] Specifically, the total number of times n that the high current terminal to be detected is detected within the detection cycle, and the n state parameters are obtained. A state parameter set is formed according to the n state parameters, and in the state parameter set, each state parameter is arranged according to the detection order.

[0084] It can be seen that in this embodiment, a detailed state parameter set is constructed for subsequent performance analysis and fault diagnosis, and the state parameters for each detection are calculated by combining the measured data and preset standard data for each detection, which helps to quantify the performance of the high current terminal.

[0085] In one embodiment, traversing the state parameter set to obtain abnormal state parameters and the first detection order corresponding to the abnormal state parameters includes: obtaining any sequence in the state parameter set, the sequence consisting of state parameters corresponding to three adjacent orders, and each state parameter corresponds to a detection order; calculating the state parameters in the sequence according to a second preset formula to obtain the difference coefficient of the middle order in the sequence; traversing all sequences in the state parameter set to obtain multiple difference coefficients, each of the multiple difference coefficients corresponding to a different detection order; screening the multiple difference coefficients to obtain a target difference coefficient; and according to the target difference coefficient, obtaining the first detection order corresponding to the target difference coefficient and the abnormal state parameter corresponding to the first detection order.

[0086] The sequence is composed of state parameters corresponding to three adjacent orders, each state parameter corresponds to a detection order. Specifically, the sequence contains the state parameter of the i-1th order. , the i-th state parameter , the i+1th state parameter , where the i-1th, i-th and i+1th are three consecutive orders.

[0087] The second preset formula is as follows:

[0088]

[0089] In the formula Indicates the state parameters detected between three adjacent detection sequences The difference coefficient of j represents the grouping subscript that combines the three consecutive detection sequences into a group of sequences. It indicates the state parameters of the high current terminal during the energization time during the i-th detection. represents the difference between the state parameters at the i-th detection and the state parameters at the i-1-th detection, represents the difference between the state parameter detected at the i-th detection and the state parameter detected at the i+1-th detection; It is the ratio of the difference between the state parameters at the i-th detection and the state parameters detected at the i-1th and i+1th times. The closer the value is to 1, the normal detection state of the high current terminal detected by the connected detection sequence. Otherwise, the abnormal detection state of the high current terminal detected by the connected detection sequence.

[0090] in, represents the difference between the state parameters detected at the i-th detection and the state parameters detected at the i+1th detection. is increasing, which means that each term is greater than the previous one, so Always greater than , which guarantees This difference will not be zero.

[0091] Among them, the coefficient of variation reflects the magnitude of changes between adjacent state parameters and is an important indicator for judging the stability of state parameters.

[0092] The fact that each difference coefficient in the plurality of difference coefficients corresponds to a different detection order means that each calculated difference coefficient corresponds to an intermediate detection order of a set of sequences. Because the difference coefficient is calculated based on the state parameters in three consecutive detection orders, as the calculation window (here, the three consecutive detection orders selected) moves in the entire state parameter set, each difference coefficient is actually calculated based on a set of new and different detection orders.

[0093] In the process of screening the plurality of difference coefficients, the screening criteria may include the size of the difference coefficients, and identify those coefficients indicating significant changes in the state parameters.

[0094] Among them, by analyzing the target difference coefficient, it is possible to obtain which detection order and corresponding abnormal state parameters the target difference coefficient represents.

[0095] It can be seen that in this embodiment, the stability of the state of the high-current terminal to be detected is evaluated by calculating the difference coefficient of the data of three consecutive detection points. Compared with the data based on a single detection point alone, potential abnormalities can be identified more accurately, thereby improving the accuracy of the state monitoring method of the high-current terminal of new energy vehicles.

[0096] In one embodiment, the screening of the multiple difference coefficients to obtain a target difference coefficient includes: calculating the multiple difference coefficients respectively according to a third preset formula to obtain a plurality of calculated difference coefficients; comparing the multiple calculated difference coefficients with a first preset abnormality threshold to obtain a target difference coefficient, wherein the target difference coefficient is a calculated difference coefficient greater than the first preset abnormality threshold.

[0097] Among them, the third preset formula is as follows:

[0098]

[0099] in, Indicates the state parameters detected between three adjacent detection sequences The coefficient of variation, Represents the calculated coefficient of variation.

[0100] The first preset abnormal threshold value may be set to 0.2, or may be set according to the performance standard of the high current terminal and actual usage, which is not limited here.

[0101] Specifically, when When the detection status of the high current terminal detected by the connected detection sequence is normal, otherwise it is abnormal.

[0102] Among them, the target difference coefficient is to reduce noise and false alarms, and only retain those difference coefficients that truly indicate abnormal conditions, which can improve the accuracy and reliability of the condition monitoring system.

[0103] It can be seen that in this embodiment, the target difference coefficient that truly indicates an abnormal state can be screened out from multiple difference coefficients, thereby improving the accuracy of the state monitoring method for high-current terminals of new energy vehicles.

[0104] In one embodiment, the analyzing the abnormal state parameter and the first detection order corresponding to the abnormal state parameter to determine that the abnormal state parameter that meets the preset abnormal requirement is the target abnormal state parameter includes: determining the target measurement data at the first detection order according to the first detection order corresponding to the abnormal state parameter; calculating the target difference coefficient corresponding to the abnormal state parameter and the target measurement data according to a fourth preset formula to obtain the abnormal value corresponding to the first detection order; comparing the abnormal value with a second preset abnormal threshold to obtain the abnormal state parameter that meets the preset abnormal requirement as the target abnormal state parameter, and the preset abnormal requirement is that the abnormal value is less than the second preset abnormal threshold.

[0105] The target measurement data may be a current value, a voltage value, a resistance value, etc. The target measurement data is an actual measurement value during the first detection sequence.

[0106] Among them, the fourth preset formula is as follows:

[0107]

[0108] In the formula Indicates that the abnormal detection order i in the detection abnormal state group j is an abnormal value caused by poor contact, Indicates the state parameters detected in the abnormal state group j The difference coefficient is used here to indicate that the detection status of the adjacent detection order is abnormal, and j represents the grouping subscript of a group of sequences composed of three connected detection orders; Indicates the ratio of the resistance values ​​of the adjacent abnormal detection order to the previous adjacent detection order, Indicates the ratio of the resistance values ​​of the adjacent and subsequent abnormal detection order. It represents the slope of the i-th detection, that is, the slope of the fitting curve of the resistance value change during the detection process at the adjacent detection order, It represents the slope of the i+1th test, that is, the slope of the fitting curve of the resistance value change during the test process at the adjacent test order. When the large current terminal is tested, each operation will cause the contact resistance to change, so and It cannot be 0. It is the ratio of the resistance value ratio of the adjacent detection order of the abnormal detection order to the previous and next adjacent detection orders and the slope of the fitting curve of the resistance value change during the detection process at the adjacent detection order, which is used to indicate the abnormal degree of the abnormal state.

[0109] in, The larger the value, the greater the probability that the high-current terminal to be tested has poor contact with the testing equipment, and vice versa.

[0110] The resistance value in the fourth preset formula can be obtained by calculating the current and voltage data of each detection to obtain the resistance value of the detection sequence; the slope of the detection sequence in the fourth preset formula is The slope of the detection order can be obtained by obtaining the fitting curve of the resistance value change during the detection process. ; Obtain the resistance value of the abnormal detection order and the adjacent detection order for comparison, and obtain their ratio .

[0111] Among them, the outlier value is an indicator to measure whether the first detection order is in an abnormal state.

[0112] The second preset abnormal threshold sets a specific condition that the abnormal state parameter needs to meet, and is used to determine whether the abnormal value is less than the preset threshold. For example, the second preset abnormal threshold may be 0.7, which is not limited here.

[0113] Optionally, the abnormal value may be normalized to obtain a normalized abnormal value, and the normalized abnormal value may be compared with a second preset abnormal threshold to obtain the abnormal state parameter that meets the preset abnormal requirement as the target abnormal state parameter.

[0114] It can be seen that in this embodiment, by calculating the abnormal value, the abnormal state parameter that meets the preset abnormal requirements can be determined as the target abnormal state parameter, and the abnormal state detected by the large current terminal due to poor contact during the detection process can be removed, thereby truly identifying the abnormality caused by the large current terminal itself, thereby improving the accuracy of the state monitoring method of the large current terminal of new energy vehicles.

[0115] In one embodiment, the measurement data includes current values ​​and voltage values, and determining the target measurement data at the first detection order corresponding to the abnormal state parameter includes: obtaining the current value and voltage value corresponding to the first detection order according to the first detection order corresponding to the abnormal state parameter; calculating the current value and the voltage value to obtain the resistance value corresponding to the first detection order; and performing data processing on the resistance value to obtain the target measurement data.

[0116] Among them, the resistance value is calculated by the current value and the voltage value, which reflects the resistance state of the large current terminal in the first detection order. The resistance value is an important indicator to measure the terminal performance.

[0117] The resistance value can be calculated by Ohm's law, that is, the resistance value is equal to the voltage value divided by the current value.

[0118] The target measurement data may be a resistance value, a slope of a detection sequence, or the like.

[0119] Data processing may include averaging, standardizing, converting resistance values ​​into percentages or other forms.

[0120] Specifically, the resistance value data processing can be to obtain a fitting curve of the resistance value change during the detection process, and obtain the slope of the detection order. .

[0121] Specifically, the data processing of the resistance value can be to compare the resistance values ​​of the abnormal detection order with the resistance values ​​of the adjacent detection order to obtain their ratio. .

[0122] It can be seen that in this embodiment, the target measurement data can help analyze the working status of the device or identify potential problems. For example, an abnormal increase in resistance value may indicate that the circuit has overheating, short circuit or other fault problems.

[0123] In one embodiment, determining the target performance quality of the high current terminal to be detected based on the target abnormal state parameter includes: obtaining a target detection order corresponding to the target abnormal state parameter; counting the number of target detection orders to obtain a total number of abnormal times; obtaining the total number of detections within the detection cycle; calculating the ratio of the total number of abnormal times to the total number of detections to obtain a target ratio; and determining the target performance quality of the high current terminal to be detected based on the target ratio.

[0124] The target detection order is a detection order corresponding to the target abnormal state parameters.

[0125] The total number of abnormalities is the sum of the number of abnormalities obtained by counting the frequency of the target detection sequence in the entire detection cycle. The total number of abnormalities reflects the frequency of challenges to the stability and reliability of the system or terminal within a given time.

[0126] The total number of tests refers to the total number of tests performed during the entire test cycle, including normal and abnormal tests. The total number of tests is the sum of the abnormal number and the normal number.

[0127] The target ratio is obtained by calculating the ratio of the total number of abnormalities to the total number of detections. The target ratio can quantitatively describe the frequency of abnormal conditions detected during the entire detection cycle. This ratio is an important parameter for judging the performance quality of the high-current terminal to be detected.

[0128] It can be seen that in this embodiment, the evaluation is performed based on the abnormal conditions actually monitored, and the performance status and target performance quality of the high-current terminal to be detected in actual operation are determined by quantitatively analyzing the abnormal frequency.

[0129] In one embodiment, determining the target performance quality of the high current terminal to be detected based on the target ratio includes: when the target ratio is greater than or equal to a first preset ratio threshold, determining the target performance quality of the high current terminal to be detected as a first performance quality; when the target ratio is less than the first preset ratio threshold and greater than or equal to a second preset ratio threshold, determining the target performance quality of the high current terminal to be detected as a second performance quality; when the target ratio is less than the second preset ratio threshold, determining the target performance quality of the high current terminal to be detected as a third performance quality.

[0130] The first preset ratio threshold and the second preset ratio threshold are both set thresholds used to distinguish different performance quality levels.

[0131] Among them, the first, second and third performance quality levels are set according to the performance standards and actual usage of high-current terminals, and they represent different states of terminal performance.

[0132] Among them, the first preset ratio threshold value may be 0.1, and the second preset ratio threshold value may be 0.05, which are not limited here.

[0133] Among them, the first performance quality may indicate that the performance quality of the large current terminal is poor, the second performance quality may indicate that the performance quality of the large current terminal is qualified, and the third performance quality may indicate that the quality is good.

[0134] For example, when the target ratio is set to P, when P≥0.1, the performance quality of the large current terminal is poor, when 0.1>P≥0.05, the performance quality of the large current terminal is qualified, and when 0.05>P, the quality of the large current terminal is good.

[0135] It can be seen that in this embodiment, by comparing the target ratio with the preset ratio threshold, a quantitative evaluation can be provided for the performance quality of the high-current terminal, thereby providing a basis for maintenance and operation decisions.

[0136] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0137] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0138] As another aspect of the embodiment of the present application, the embodiment of the present application provides a state monitoring device based on a high-current terminal of a new energy vehicle. The state monitoring device based on a high-current terminal of a new energy vehicle can be a software module, and the software module includes a number of instructions, which are stored in a memory, and the processor can access the memory and call the instructions for execution to complete the state monitoring method of the high-current terminal of the new energy vehicle described in the above-mentioned various embodiments.

[0139] See also Figure 2 , Figure 2 Schematic diagram of a state monitoring device for a high current terminal of a new energy vehicle provided in an embodiment of the present application. Figure 2As shown, the state monitoring device 200 based on the high current terminal of the new energy vehicle includes:

[0140] A control unit 201, used to control the performance detection device to perform a power-on test on the high current terminal to be detected, and obtain measurement data within a detection cycle;

[0141] A determination unit 202, configured to obtain a state parameter set of the high-current terminal to be detected in the detection period according to the measurement data and preset standard data corresponding to the high-current terminal to be detected, wherein the state parameter set includes a plurality of state parameters in the detection period, and any two of the plurality of state parameters are in an adjacent order;

[0142] The determining unit 202 is further configured to traverse the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters;

[0143] An analyzing unit 203 is used to analyze the abnormal state parameters and the first detection order corresponding to the abnormal state parameters, and determine that the abnormal state parameters that meet the preset abnormal requirements are target abnormal state parameters;

[0144] The determining unit 202 is further configured to determine a target performance quality of the high-current terminal to be detected according to the target abnormal state parameter.

[0145] The present invention has the following beneficial effects: by conducting a power-on test on the high-current terminal to be detected, accurate measurement data can be obtained, thereby improving the accuracy of performance detection, and by continuously obtaining measurement data within the detection cycle, the state of the high-current terminal can be monitored in real time, and potential performance problems can be discovered in time; further, by comparing the measurement data with preset standard data, a state parameter set is obtained, which helps to more comprehensively understand the performance of the high-current terminal within the detection cycle, and by traversing the state parameter set, abnormal state parameters and their corresponding detection order can be quickly identified, which helps to discover abnormal situations in time; further, by analyzing the abnormal state parameters, it is possible to accurately determine which abnormal state parameters are target abnormal state parameters, thereby conducting more targeted abnormal state troubleshooting, and finally, based on the target abnormal state parameters, the performance quality of the high-current terminal to be detected can be evaluated to ensure the quality and reliability of the product.

[0146] In one embodiment, the measurement data includes a current value and a temperature rise value, and the preset standard data includes a preset standard current value and a preset standard temperature rise value. In the state parameter set of the high current terminal to be detected in the detection cycle is obtained according to the measurement data and the preset standard data corresponding to the high current terminal to be detected, the determination unit 202 is also used to: obtain the current value and temperature rise value at each detection in the detection cycle; obtain the preset standard current value and preset standard temperature rise value corresponding to the high current terminal to be detected; calculate the ratio between the current value, the temperature rise value and the preset standard current value and the preset standard temperature rise value according to a first preset formula to obtain the state parameter at each detection in the detection cycle; sort the state parameters according to the detection order in the detection cycle to obtain the state parameter set of the high current terminal to be detected in the detection cycle, and the state parameter set includes multiple state parameters in the detection cycle, and the state parameters in the multiple state parameters are in adjacent order.

[0147] In one embodiment, in traversing the state parameter set to obtain abnormal state parameters and the first detection order corresponding to the abnormal state parameters, the determination unit 202 is further used to: obtain any sequence in the state parameter set, the sequence is composed of state parameters corresponding to three adjacent orders, and each state parameter corresponds to a detection order; according to a second preset formula, the state parameters in the sequence are calculated to obtain the difference coefficient of the middle order in the sequence; traverse all sequences in the state parameter set to obtain multiple difference coefficients, and each difference coefficient in the multiple difference coefficients corresponds to a different detection order; screen the multiple difference coefficients to obtain a target difference coefficient; according to the target difference coefficient, obtain the first detection order corresponding to the target difference coefficient and the abnormal state parameter corresponding to the first detection order.

[0148] In one embodiment, in the screening of the multiple difference coefficients to obtain the target difference coefficient, the determination unit 202 is further used to: calculate the multiple difference coefficients respectively according to a third preset formula to obtain a plurality of calculated difference coefficients; compare the multiple calculated difference coefficients with a first preset abnormality threshold to obtain a target difference coefficient, wherein the target difference coefficient is a calculated difference coefficient greater than the first preset abnormality threshold.

[0149] In one embodiment, in the analysis of the abnormal state parameter and the first detection order corresponding to the abnormal state parameter, and determining that the abnormal state parameter that meets the preset abnormal requirement is the target abnormal state parameter, the analysis unit 203 is further used to: determine the target measurement data at the first detection order according to the first detection order corresponding to the abnormal state parameter; calculate the target difference coefficient corresponding to the abnormal state parameter and the target measurement data according to a fourth preset formula to obtain the abnormal value corresponding to the first detection order; compare the abnormal value with the second preset abnormal threshold value to obtain the abnormal state parameter that meets the preset abnormal requirement as the target abnormal state parameter, and the preset abnormal requirement is that the abnormal value is less than the second preset abnormal threshold value.

[0150] In one embodiment, the measurement data includes current values ​​and voltage values. In determining the target measurement data in the first detection order corresponding to the abnormal state parameter, the analysis unit 203 is further used to: obtain the current value and voltage value corresponding to the first detection order according to the first detection order corresponding to the abnormal state parameter; calculate the current value and the voltage value to obtain the resistance value corresponding to the first detection order; and perform data processing on the resistance value to obtain the target measurement data.

[0151] In one embodiment, in determining the target performance quality of the high-current terminal to be detected based on the target abnormal state parameter, the determination unit 202 is further used to: obtain a target detection order corresponding to the target abnormal state parameter; count the number of target detection orders to obtain a total number of abnormal times; obtain the total number of detections within the detection cycle; calculate the ratio of the total number of abnormal times to the total number of detections to obtain a target ratio; and determine the target performance quality of the high-current terminal to be detected based on the target ratio.

[0152] In one embodiment, in determining the target performance quality of the high-current terminal to be detected based on the target ratio, the determination unit 202 is further used to: when the target ratio is greater than or equal to a first preset ratio threshold, determine that the target performance quality of the high-current terminal to be detected is the first performance quality; when the target ratio is less than the first preset ratio threshold and greater than or equal to a second preset ratio threshold, determine that the target performance quality of the high-current terminal to be detected is the second performance quality; when the target ratio is less than the second preset ratio threshold, determine that the target performance quality of the high-current terminal to be detected is the third performance quality.

[0153] It should be noted that the above-mentioned state monitoring device based on the high-current terminal of a new energy vehicle can execute the state monitoring method of the high-current terminal of a new energy vehicle provided in the embodiment of the present application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details not fully described in the embodiment of the state monitoring device based on the high-current terminal of a new energy vehicle, please refer to the state monitoring method of the high-current terminal of a new energy vehicle provided in the embodiment of the present application.

[0154] See also Figure 3 , Figure 3 Schematic diagram of the structure of a computer device provided in an embodiment of the present application. Figure 3 As shown, the computer device 300 includes a processor 301 and a memory 302. The processor 301 is in communication connection with the memory 302.

[0155] The processor 301 is configured to support the computer device to perform the corresponding functions in the state monitoring method of the high-current terminal of the new energy vehicle in the above method embodiment. The processor 301 can be a central processing unit (CPU), a network processor (NP), a hardware chip or any combination thereof. The above hardware chip can be an application specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0156] Specifically, the processor 301 may include a sending card, a receiving card and a driving chip.

[0157] The memory 302 is used to store program codes, etc. The memory 302 may include a volatile memory (VM), such as a random access memory (RAM); the memory 302 may also include a non-volatile memory (NVM), such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); the memory 302 may also include a combination of the above-mentioned types of memories.

[0158] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer executes the state monitoring method of high-current terminals of new energy vehicles as described in the above-mentioned embodiment.

[0159] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0160] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0161] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A method for monitoring the status of a high current terminal of a new energy vehicle, characterized in that: A state monitoring system for a high current terminal of a new energy vehicle, the state monitoring system for a high current terminal of a new energy vehicle comprising a performance detection device, the method comprising: Control the performance detection device to conduct a power-on test on the high-current terminal to be detected, and obtain measurement data within the detection cycle; According to the measurement data and the preset standard data corresponding to the high-current terminal to be detected, a state parameter set of the high-current terminal to be detected in the detection period is obtained, wherein the state parameter set includes a plurality of state parameters in the detection period, and any two of the plurality of state parameters are in an adjacent order; Traversing the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters; Analyze the abnormal state parameters and the first detection order corresponding to the abnormal state parameters, and determine that the abnormal state parameters that meet the preset abnormal requirements are target abnormal state parameters; Determining a target performance quality of the high-current terminal to be detected according to the target abnormal state parameter; The traversing the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters includes: Obtain any sequence in the state parameter set, the sequence consisting of state parameters corresponding to three adjacent orders, each state parameter corresponding to a detection order; Calculating the state parameters in the sequence according to a second preset formula to obtain a difference coefficient of the middle order in the sequence; Traversing all sequences in the state parameter set to obtain a plurality of difference coefficients, wherein each difference coefficient in the plurality of difference coefficients corresponds to a different detection order; Screening the multiple difference coefficients to obtain a target difference coefficient; According to the target difference coefficient, obtaining a first detection order corresponding to the target difference coefficient and an abnormal state parameter corresponding to the first detection order; The screening of the plurality of difference coefficients to obtain a target difference coefficient includes: According to a third preset formula, the plurality of difference coefficients are calculated respectively to obtain a plurality of calculated difference coefficients; Comparing the plurality of calculated difference coefficients with a first preset abnormality threshold to obtain a target difference coefficient, wherein the target difference coefficient is a calculated difference coefficient greater than the first preset abnormality threshold; The analyzing the abnormal state parameter and the first detection order corresponding to the abnormal state parameter, and determining the abnormal state parameter that meets the preset abnormal requirement as the target abnormal state parameter, includes: Determining target measurement data at the first detection order according to the first detection order corresponding to the abnormal state parameter; According to a fourth preset formula, the target difference coefficient corresponding to the abnormal state parameter and the target measurement data are calculated to obtain an abnormal value corresponding to the first detection order; Compare the abnormal value with a second preset abnormal threshold, and obtain the abnormal state parameter that meets the preset abnormal requirement as the target abnormal state parameter, wherein the preset abnormal requirement is that the abnormal value is less than the second preset abnormal threshold; The fourth preset formula includes: In the formula, Indicates that the abnormal detection order i in the abnormal state group j is an abnormal value caused by poor contact, Indicates the state parameters detected in the abnormal state group j The difference coefficient of , j represents the grouping subscript of a set of sequences composed of three connected detection orders; Indicates the ratio of the resistance values ​​of the adjacent abnormal detection order to the previous adjacent detection order, Indicates the ratio of the resistance values ​​of the adjacent and subsequent abnormal detection order. It represents the slope of the i-th detection, that is, the slope of the fitting curve of the resistance value change during the detection process at the adjacent detection order, represents the slope of the i+1th detection, that is, the slope of the fitting curve of the resistance value change during the detection process at the adjacent detection order, where, and Not 0.

2. The state monitoring method of a high current terminal of a new energy vehicle according to claim 1 is characterized in that: The measurement data includes a current value and a temperature rise value, the preset standard data includes a preset standard current value and a preset standard temperature rise value, and the state parameter set of the high current terminal to be detected in the detection cycle is obtained according to the measurement data and the preset standard data corresponding to the high current terminal to be detected, including: Obtaining the current value and the temperature rise value at each detection in the detection cycle; Obtaining a preset standard current value and a preset standard temperature rise value corresponding to the high current terminal to be detected; According to the first preset formula, the ratio between the current value, the temperature rise value and the preset standard current value and the preset standard temperature rise value is calculated to obtain the state parameters of each detection in the detection cycle; The state parameters are sorted according to the detection order in the detection cycle to obtain a state parameter set of the high current terminal to be detected in the detection cycle, wherein the state parameter set includes multiple state parameters in the detection cycle, and each of the multiple state parameters is in an adjacent order.

3. The state monitoring method of a high current terminal of a new energy vehicle according to claim 1 is characterized in that: The measurement data includes a current value and a voltage value, and the determining, according to the first detection order corresponding to the abnormal state parameter, the target measurement data in the first detection order includes: According to the first detection sequence corresponding to the abnormal state parameter, a current value and a voltage value corresponding to the first detection sequence are obtained; Calculating the current value and the voltage value to obtain a resistance value corresponding to the first detection sequence; The resistance value is processed to obtain target measurement data.

4. The state monitoring method of a high current terminal of a new energy vehicle according to claim 1 is characterized in that: Determining the target performance quality of the high current terminal to be detected according to the target abnormal state parameter includes: Obtaining a target detection order corresponding to the target abnormal state parameter; Counting the number of times the target detection sequence occurs to obtain a total value of abnormal times; Obtain the total number of detections within the detection cycle; Calculate the ratio of the total number of abnormalities to the total number of detections to obtain a target ratio; The target performance quality of the high-current terminal to be detected is determined according to the target ratio.

5. The state monitoring method of a high current terminal of a new energy vehicle according to claim 4 is characterized in that: Determining the target performance quality of the high current terminal to be detected according to the target ratio includes: When the target ratio is greater than or equal to a first preset ratio threshold, determining the target performance quality of the high current terminal to be detected to be a first performance quality; When the target ratio is less than a first preset ratio threshold and greater than or equal to a second preset ratio threshold, determining the target performance quality of the high current terminal to be detected to be a second performance quality; When the target ratio is less than a second preset ratio threshold, the target performance quality of the high-current terminal to be detected is determined to be a third performance quality.

6. A state monitoring system for high current terminals of new energy vehicles, characterized in that: Including performance testing equipment; The performance detection device is used to control the performance detection device to perform a power-on test on the high current terminal to be detected, and obtain measurement data within the detection cycle; The performance detection device is further used to obtain a state parameter set of the high-current terminal to be detected in the detection period according to the measurement data and the preset standard data corresponding to the high-current terminal to be detected, wherein the state parameter set includes multiple state parameters in the detection period, and each of the multiple state parameters is in an adjacent order; The performance detection device is also used to traverse the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters; The performance detection device is also used to analyze the abnormal state parameters and the first detection order corresponding to the abnormal state parameters, and determine that the abnormal state parameters that meet the preset abnormal requirements are target abnormal state parameters; The performance detection device is also used to determine the target performance quality of the high current terminal to be detected according to the target abnormal state parameter; The traversing the state parameter set to obtain abnormal state parameters and a first detection order corresponding to the abnormal state parameters includes: Obtain any sequence in the state parameter set, the sequence consisting of state parameters corresponding to three adjacent orders, each state parameter corresponding to a detection order; Calculating the state parameters in the sequence according to a second preset formula to obtain a difference coefficient of the middle order in the sequence; Traversing all sequences in the state parameter set to obtain a plurality of difference coefficients, wherein each difference coefficient in the plurality of difference coefficients corresponds to a different detection order; Screening the multiple difference coefficients to obtain a target difference coefficient; According to the target difference coefficient, obtaining a first detection order corresponding to the target difference coefficient and an abnormal state parameter corresponding to the first detection order; The screening of the plurality of difference coefficients to obtain a target difference coefficient includes: According to a third preset formula, the plurality of difference coefficients are calculated respectively to obtain a plurality of calculated difference coefficients; Comparing the plurality of calculated difference coefficients with a first preset abnormality threshold to obtain a target difference coefficient, wherein the target difference coefficient is a calculated difference coefficient greater than the first preset abnormality threshold; The analyzing the abnormal state parameter and the first detection order corresponding to the abnormal state parameter, and determining the abnormal state parameter that meets the preset abnormal requirement as the target abnormal state parameter, includes: Determining target measurement data at the first detection order according to the first detection order corresponding to the abnormal state parameter; According to a fourth preset formula, the target difference coefficient corresponding to the abnormal state parameter and the target measurement data are calculated to obtain an abnormal value corresponding to the first detection order; Compare the abnormal value with a second preset abnormal threshold, and obtain the abnormal state parameter that meets the preset abnormal requirement as the target abnormal state parameter, wherein the preset abnormal requirement is that the abnormal value is less than the second preset abnormal threshold; The fourth preset formula includes: In the formula, Indicates that the abnormal detection order i in the detection abnormal state group j is an abnormal value caused by poor contact, Indicates the state parameters detected in the abnormal state group j The difference coefficient of , j represents the grouping subscript of a set of sequences composed of three connected detection orders; Indicates the ratio of the resistance values ​​of the adjacent abnormal detection order to the previous adjacent detection order, Indicates the ratio of the resistance values ​​of the adjacent and subsequent abnormal detection order. It represents the slope of the i-th detection, that is, the slope of the fitting curve of the resistance value change during the detection process at the adjacent detection order, represents the slope of the i+1th detection, that is, the slope of the fitting curve of the resistance value change during the detection process at the adjacent detection order, where, and Not 0.

7. A computer device, characterized in that: The method comprises a memory and a processor, wherein the memory is connected to the processor, and the processor is used to execute one or more computer programs stored in the memory. When the processor executes the one or more computer programs, the computer device implements the method according to any one of claims 1 to 5.

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