CN-122020418-A - Fuse monitoring system of high-voltage connector and vehicle electrical performance monitoring system

CN122020418ACN 122020418 ACN122020418 ACN 122020418ACN-122020418-A

Abstract

The invention relates to the technical field of fuse monitoring, in particular to a fuse monitoring system of a high-voltage connector and a vehicle electrical performance monitoring system. In the invention, continuous state quantity is constructed through serialization processing of temperature change, stress change and resistance change, degradation tracks are made to obtain distinguishable expression through normalization correlation of gradient characteristics and change rate characteristics, the appearance degree of degradation trend in multi-source data is enhanced through a principal component extraction mode, a response boundary capable of synchronously changing along with environment and state is formed through a weighting threshold and an amplitude correction mode, and early-stage degradation and abnormal evolution front-stage judgment is realized through hysteresis analysis and migration trend identification, so that the state characterization precision of a fusing element is improved, and the stability and the foresight of vehicle electrical performance monitoring are enhanced.

Inventors

ZENG ZHIJIAN
Zou taihe

Assignees

顺科智连技术股份有限公司
广东顺科连接技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260122

Claims (10)

1. A fuse monitoring system for a high voltage connector and a vehicle electrical performance monitoring system, the system comprising: The data analysis module is used for acquiring temperature data, stress data and resistance data of the high-voltage connector, smoothing the sequences, calculating temperature gradient, stress gradient and resistance change rate of the smoothed data, generating state change data and transmitting the state change data to the feature extraction module; the characteristic extraction module is used for extracting temperature gradient, stress gradient and resistance change rate based on the state change data, normalizing the temperature gradient, stress gradient and resistance change rate, performing difference operation to obtain a state change input quantity, extracting a main component of a degradation trend, performing classification judgment on the state change input quantity, generating a degradation characteristic coefficient and transmitting the degradation characteristic coefficient to the threshold value generation module; the threshold generation module is used for acquiring stress gradient and resistance change rate, combining the degradation characteristic coefficient to weight and analyze an initial response threshold, calling temperature gradient data to carry out amplitude correction, generating a dynamic response threshold and transmitting the dynamic response threshold to the risk assessment module; And the risk assessment module is used for extracting the temperature gradient, the stress gradient and the resistance change rate based on the state change data, calculating response hysteresis quantity, comparing the amplitude of the dynamic response threshold, analyzing migration trend factors, judging the risk of the temperature gradient, the stress gradient and the resistance change rate and generating a vehicle electrical performance monitoring result.
2. The fuse monitoring system of a high voltage connector and a vehicle electrical performance monitoring system of claim 1 wherein said state change data comprises a temperature change vector, a stress change vector, a resistance change vector, said degradation characteristic coefficients comprise a principal component coefficient, a classification discrimination coefficient, a normalized difference coefficient, said dynamic response threshold comprises a stress correction threshold, a resistance correction threshold, a temperature magnitude threshold, and said vehicle electrical performance monitoring result comprises a risk level index, a response hysteresis index, a migration trend factor.
3. The high voltage connector fuse monitoring system and vehicle electrical performance monitoring system of claim 1, wherein the data analysis module comprises: the data flow receiving sub-module is used for collecting the temperature, stress and resistance data of the fuse of the high-voltage connector, integrating the data in time sequence, judging the collection error in a point-by-point comparison mode, executing error rejection operation, and executing section connection on the residual sequence after rejection to generate an original monitoring sequence; the sequence smoothing sub-module is used for calling a temperature, stress and resistance sequence based on the original monitoring sequence, calculating the sequence fluctuation degree according to the difference value of adjacent sampling points, executing section numerical value replacement according to a fluctuation degree threshold value and carrying out section mean value reconstruction to obtain a smooth monitoring sequence; And the state characteristic sub-module is used for calling the temperature, stress and resistance sequences according to the smooth monitoring sequences, calculating the temperature gradient and the stress gradient, analyzing the resistance change rate according to the front-to-back ratio of the resistance sequences, and combining the temperature gradient, the stress gradient and the resistance change rate to generate state change characteristic data.
4. The system for monitoring the fuse of a high voltage connector and the system for monitoring the electrical performance of a vehicle according to claim 3, wherein the fluctuation degree threshold value is determined by counting the distribution of the difference values of adjacent sampling points of a sequence, calculating absolute values of the difference values of a temperature sequence, a stress sequence and a resistance sequence according to time sequence, sorting the absolute values of all the difference values according to the numerical values to form a difference distribution sequence, and extracting the median value of the difference distribution sequence.
5. The high voltage connector fuse monitoring system and vehicle electrical performance monitoring system of claim 1, wherein the feature extraction module comprises: The gradient calculation sub-module is used for extracting a temperature gradient, a stress gradient value and a resistance change rate based on the state change characteristic data, obtaining a corresponding time sequence, performing difference comparison, screening a section with stable change amplitude, and sorting gradient parameters at the same time position in a numerical value accumulation mode to generate a gradient data set; The normalization generation sub-module is used for calling the temperature gradient, the stress gradient and the resistance change rate in the gradient data set, performing scaling, calculating a normalization difference value, screening input parameters in the normalization difference value in a numerical comparison mode, and generating a state change normalization input value; And the principal component classification sub-module is used for acquiring the time sequence distribution of the multiple parameters based on the state change normalized input quantity, calculating the covariance of the multiple parameter sequences to determine the trend association degree, screening dominant trend components as the principal component of the degradation trend, and performing interval classification on the state change normalized input quantity to generate the degradation characteristic coefficient.
6. The high voltage connector fuse monitoring system and vehicle electrical performance monitoring system of claim 1, wherein the threshold generation module comprises: The gradient parameter submodule acquires stress gradient and resistance change rate and correspondingly checks time, the checked sequence adopts a numerical comparison method to judge data difference of multiple time points and exclude abnormal jump points, and sequence integration synchronization is performed according to data volume of the residual section to generate a corresponding resistance joint sequence volume; the degradation coefficient sub-module calls the corresponding resistance combination sequence quantity, performs weighting by combining the multi-time-point data in the corresponding resistance combination sequence quantity with the degradation characteristic coefficient, eliminates the weighting result exceeding the amplitude reference value, and performs sequence accumulation according to the residual weighting value to obtain a weighting response basic result; And the threshold value correction sub-module is used for executing amplitude comparison according to the weighted response basic result and the numerical value of the same time point in the temperature gradient data, calculating the deviation ratio between the amplitude value of the temperature gradient data and the preset standard amplitude as a deviation ratio, and overlapping the deviation ratio with the weighted response basic result to generate a dynamic response threshold value.
7. The system for monitoring the fuse of a high voltage connector and the system for monitoring the electrical performance of a vehicle according to claim 6, wherein the amplitude reference value is determined by performing a numerical distribution analysis on a data section weighted by a degradation characteristic coefficient, acquiring amplitude values of all sampling points in the section, performing sorting, and calculating a median value of the sorted amplitude values.
8. The high voltage connector fuse monitoring system and vehicle electrical performance monitoring system of claim 1, wherein the risk assessment module comprises: the response hysteresis sub-module is used for extracting time sequences of temperature gradient, stress gradient and resistance change rate based on the state change data, acquiring multi-sequence peak time points, performing time difference operation, analyzing response difference by adopting difference values between the peak time points and generating response hysteresis quantity; The threshold value comparison sub-module is used for calling the response hysteresis quantity and the dynamic response threshold value, comparing amplitude sections of amplitude sequences of temperature gradients, stress gradients and resistance change rates, and performing amplitude difference calculation by adopting differences of the amplitude sequences inside and outside the threshold value sections to generate migration trend factors; And the migration interval sub-module is used for calling the migration trend factors and the dynamic response threshold value, performing interval division judgment on the temperature gradient, the stress gradient and the resistance change rate, and performing section attribution judgment and risk category division between the migration trend factor values and interval boundaries to generate a vehicle electrical performance monitoring result.
9. The high voltage connector fuse monitoring system and vehicle electrical performance monitoring system of claim 8, further comprising: The state monitoring module is used for performing refinement and grading processing on the vehicle electrical performance monitoring result to obtain a fuse state monitoring result, and performing life attenuation trend analysis and characteristic clustering operation on the fuse state monitoring result to generate an optimized vehicle electrical performance monitoring result; the optimized vehicle electrical performance monitoring result comprises a grading state index, a service life attenuation index and a characteristic clustering index.
10. The high voltage connector fuse monitoring system and vehicle electrical performance monitoring system of claim 9, wherein the status monitoring module comprises: The risk fine molecular module is used for executing section reading on the risk category based on the vehicle electrical performance monitoring result, extracting the boundary difference between the section position of the risk category and the risk classification reference value, performing classification judgment, calling the vehicle electrical operation index corresponding to the risk category as a classification mapping quantity, and generating a fuse state monitoring result; The life trend submodule is used for calling the fuse state monitoring result, acquiring resistance change and temperature change, comparing the resistance change with the risk level magnitude execution trend, carrying out trend difference by adopting the time sequence slope of the change sequence and the section position of the risk level, analyzing the life attenuation vector, and generating the life attenuation trend; The characteristic clustering sub-module is used for calling the electrical behavior characteristic sequence of the life attenuation trend and the fuse state monitoring result, calculating a characteristic distance, extracting an amplitude interval of the life attenuation trend and the fuse state monitoring result, calculating a difference value, and clustering by combining the life attenuation trend value to generate an optimized vehicle electrical performance monitoring result; The risk classification reference value is set by counting distribution characteristics of the electrical performance data, analyzing the average value of the long-term distribution characteristics and the sum of standard deviation of three times based on the long-term distribution characteristics of temperature, current and voltage indexes.

Description

Fuse monitoring system of high-voltage connector and vehicle electrical performance monitoring system Technical Field The invention relates to the technical field of fuse monitoring, in particular to a fuse monitoring system of a high-voltage connector and a vehicle electrical performance monitoring system. Background The technical field of fuse monitoring belongs to the protection of a power system and the detection direction of a state, mainly surrounds the real-time state identification of a fuse in a circuit, the disconnection judgment under an overcurrent condition, the conduction integrity detection of a high-voltage connection part and the operation state sensing expansion of an internal power utilization system of a vehicle or equipment, and realizes the judgment of the working condition of a fuse element by monitoring the current, the voltage, the temperature rise and the change of a conductive structure. The fuse monitoring system of the conventional high-voltage connector and the vehicle electrical performance monitoring system refer to a technical scheme for carrying out state identification on a fuse and related electrical parameters in a high-voltage connection position or a vehicle power system, and generally, whether the fuse is in a complete or disconnected state is judged by arranging a sampling wire, a detection resistor or a mechanically triggered fusing indicating sheet, and the electrical performance of a circuit is monitored by using a current sampling coil, a voltage sampling node or a temperature sensitive element which are arranged on a vehicle power supply circuit. The prior art relies on potential difference comparison before and after a fuse, conductor continuity detection, single-point measurement signals such as temperature or current and the like, the monitoring process is sensitive to transient disturbance, synchronous identification of temperature change, mechanical stress and conduction quality is difficult to obtain at a high-voltage connecting part, abnormal evolution is difficult to identify in advance due to weak data relevance, a single threshold judgment mode is insufficient in response to slow degradation characteristics, identification hysteresis is easy to appear at an early aging stage of a fuse element, electrical deviation of a vehicle power supply system under complex load is difficult to effectively distinguish, and risk early warning delay, rough state evaluation and service life attenuation trend are difficult to accurately capture. Disclosure of Invention In order to solve the technical problems in the prior art, the embodiment of the invention provides a fuse monitoring system of a high-voltage connector and a vehicle electrical performance monitoring system. The technical scheme is as follows: in one aspect, a fuse monitoring system for a high voltage connector and a vehicle electrical performance monitoring system are provided, the system comprising: The data analysis module is used for acquiring temperature data, stress data and resistance data of the high-voltage connector, smoothing the sequences, calculating temperature gradient, stress gradient and resistance change rate of the smoothed data, generating state change data and transmitting the state change data to the feature extraction module; the characteristic extraction module is used for extracting temperature gradient, stress gradient and resistance change rate based on the state change data, normalizing the temperature gradient, stress gradient and resistance change rate, performing difference operation to obtain a state change input quantity, extracting a main component of a degradation trend, performing classification judgment on the state change input quantity, generating a degradation characteristic coefficient and transmitting the degradation characteristic coefficient to the threshold value generation module; the threshold generation module is used for acquiring stress gradient and resistance change rate, combining the degradation characteristic coefficient to weight and analyze an initial response threshold, calling temperature gradient data to carry out amplitude correction, generating a dynamic response threshold and transmitting the dynamic response threshold to the risk assessment module; The risk assessment module is used for extracting a temperature gradient, a stress gradient and a resistance change rate based on the state change data, calculating response hysteresis quantity, comparing the amplitude of the dynamic response threshold, analyzing migration trend factors, judging risks of the temperature gradient, the stress gradient and the resistance change rate, and generating a vehicle electrical performance monitoring result; And the state monitoring module is used for performing refinement and grading processing on the vehicle electrical performance monitoring result to obtain a fuse state monitoring result, and performing life attenuation trend analysis and characteristic clu