Vehicle high-voltage wiring harness life prediction method and system, electronic equipment and storage medium

Abstract

The invention discloses a vehicle high-voltage wiring harness life prediction method and system, electronic equipment and a storage medium. The method comprises the steps of obtaining first temperature data of an insulating layer surface of a target high-voltage wiring harness; determining temperature-operation time distribution data of the target high-voltage wiring harness according to the first temperature data, and determining a plurality of temperature intervals and corresponding interval operation time according to the temperature-operation time distribution data; obtaining the test temperature of a preset Arrhenius model and the corresponding design operation time, determining the acceleration factor of each temperature interval according to the test temperature, and predicting the equivalent operation time of the target high-voltage wire harness at the test temperature according to the acceleration factor and the interval operation time; and determining the residual life of the target high-voltage wire harness according to the equivalent operation time and the design operation time. The method improves the real-time performance and accuracy of vehicle high-voltage wire harness life prediction, and can be applied to the technical field of vehicle monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle monitoring, and in particular to a method, system, electronic equipment and storage medium for predicting the life of a vehicle high-voltage wiring harness. Background Art

[0002] As the number of electric vehicles continues to increase, the life prediction of high-voltage wire harnesses can meet the needs of users for high-voltage wire harness maintenance and residual value assessment. Since the ambient temperature of the high-voltage wire harness of hybrid vehicles is affected by high-temperature components such as the engine and exhaust, the life of the high-voltage wire harness accelerates with the increase in temperature. When the insulation layer of the high-voltage wire harness cracks and breaks due to thermal aging, it will cause potential insulation failure or even short circuit risks to the high-voltage system of the vehicle, endangering the driving safety of users. It is necessary to use the life prediction of the high-voltage wire harness to remind users to perform high-voltage wire harness maintenance in a timely manner, and it can also provide data support for the residual value assessment of the high-voltage wire harness.

[0003] In the prior art, the reliability of the high-voltage wire harness is mainly evaluated based on the dynamic changes in the surface temperature and core temperature of the high-voltage wire harness. Since the core temperature cannot be directly measured when the vehicle is driving, the dynamic current data passing through the high-voltage wire harness is often obtained when the vehicle is driving, and then a test circuit is built to simulate the current changes of the high-voltage wire harness core under real vehicle conditions, thereby obtaining the corresponding core temperature change value. On the one hand, this method cannot perform real-time reliability evaluation of the high-voltage wire harness during vehicle driving, which affects the real-time prediction of the life of the vehicle's high-voltage wire harness. On the other hand, it is limited by the degree of restoration of the built test circuit to the real vehicle conditions, which affects the accuracy of the prediction of the life of the vehicle's high-voltage wire harness. Summary of the invention

[0004] The purpose of the present invention is to solve one of the technical problems existing in the prior art to at least a certain extent.

[0005] To this end, an object of an embodiment of the present invention is to provide a method for predicting the life of a vehicle high-voltage wire harness, which improves the real-time performance and accuracy of the prediction of the life of a vehicle high-voltage wire harness.

[0006] Another object of an embodiment of the present invention is to provide a vehicle high-voltage wire harness life prediction system.

[0007] In order to achieve the above technical objectives, the technical solutions adopted by the embodiments of the present invention include:

[0008] On the one hand, an embodiment of the present invention provides a method for predicting the life of a vehicle high-voltage wiring harness, comprising the following steps:

[0009] Acquiring first temperature data of the surface of the insulation layer of the target high-voltage wire harness;

[0010] Determining temperature-operation time distribution data of the target high-voltage wire harness according to the first temperature data, and determining a plurality of temperature intervals and corresponding interval operation times according to the temperature-operation time distribution data;

[0011] Obtaining a preset Arrhenius model test temperature and a corresponding design operating time, determining an acceleration factor for each temperature interval according to the test temperature, and then predicting an equivalent operating time of the target high-voltage wiring harness at the test temperature according to the acceleration factor and the interval operating time;

[0012] The remaining life of the target high-voltage wiring harness is determined according to the equivalent operating time and the designed operating time.

[0013] Further, in one embodiment of the present invention, the first temperature data of the surface of the insulation layer of the target high-voltage wire harness is obtained, which is specifically:

[0014] The first temperature data of the surface of the insulation layer of the target high-voltage wire harness is acquired by a temperature sensor, and the temperature sensor is arranged in a plurality of pre-calibrated high-temperature areas of the target high-voltage wire harness.

[0015] Further, in one embodiment of the present invention, the temperature-operation time distribution data of the target high-voltage wire harness is determined according to the first temperature data, and a plurality of temperature intervals and corresponding interval operation times are determined according to the temperature-operation time distribution data, which specifically includes:

[0016] Uploading the first temperature data to the cloud platform through the vehicle controller;

[0017] De-noising, frequency alignment and interpolation processing are performed on the first temperature data through the cloud platform to obtain second temperature data showing that the temperature of the surface of the insulation layer of the target high-voltage wire harness changes with time, and the second temperature data is used as the temperature-operating time distribution data;

[0018] Determine multiple temperature intervals, segment the temperature-operating time distribution data according to the temperature intervals, obtain a number of operating time segments corresponding to each temperature interval, and then determine the interval operating time corresponding to each temperature interval according to the total duration of the operating time segments.

[0019] Further, in one embodiment of the present invention, the determining of the acceleration factor of each temperature interval according to the test temperature specifically includes:

[0020] Obtain preset activation energy parameters of high-voltage wiring harness;

[0021] Taking the median temperature of each temperature interval as the actual temperature of the corresponding temperature interval;

[0022] The acceleration factor in each temperature range is calculated based on the activation energy parameter of the high-voltage wire harness, the test temperature, the actual temperature and the acceleration factor formula of the Arrhenius model.

[0023] Further, in one embodiment of the present invention, predicting the equivalent operating time of the target high-voltage wiring harness at the test temperature according to the acceleration factor and the interval operating time specifically includes:

[0024] Predicting the interval equivalent running time of the corresponding temperature interval according to the acceleration factor and the interval running time;

[0025] The equivalent operation time of the target high-voltage wire harness at the test temperature is determined according to the sum of the equivalent operation times in each of the temperature intervals.

[0026] Further, in one embodiment of the present invention, determining the remaining life of the target high-voltage wiring harness according to the equivalent operating time and the designed operating time specifically includes:

[0027] Determining the operating time proportion of the target high-voltage wiring harness according to the ratio of the equivalent operating time to the designed operating time;

[0028] Determining the actual operation time of the target high-voltage wiring harness according to the sum of the interval operation time of each temperature interval;

[0029] The actual service life of the target high-voltage wire harness is predicted according to the actual operating time and the operating time ratio, and then the remaining life of the target high-voltage wire harness is determined according to the difference between the actual service life and the actual operating time.

[0030] Furthermore, in one embodiment of the present invention, the vehicle high voltage wire harness life prediction method further includes the following steps:

[0031] When the equivalent operating time is greater than or equal to a preset first threshold, or the operating time proportion is greater than or equal to a preset second threshold, high-voltage wire harness maintenance warning information is generated.

[0032] On the other hand, an embodiment of the present invention provides a vehicle high-voltage wire harness life prediction system, comprising:

[0033] A data acquisition module, used to acquire first temperature data of the surface of the insulation layer of the target high-voltage wire harness;

[0034] a data processing module, configured to determine temperature-operation time distribution data of the target high-voltage wiring harness according to the first temperature data, and determine a plurality of temperature intervals and corresponding interval operation times according to the temperature-operation time distribution data;

[0035] An equivalent operation time prediction module, used to obtain a preset Arrhenius model test temperature and a corresponding design operation time, determine an acceleration factor for each temperature interval according to the test temperature, and then predict the equivalent operation time of the target high-voltage wiring harness at the test temperature according to the acceleration factor and the interval operation time;

[0036] The remaining life determination module is used to determine the remaining life of the target high-voltage wire harness according to the equivalent operating time and the designed operating time.

[0037] On the other hand, an embodiment of the present invention provides an electronic device, which includes a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection and communication between the processor and the memory. When the program is executed by the processor, the vehicle high-voltage wire harness life prediction method as described above is realized.

[0038] On the other hand, an embodiment of the present invention further provides a storage medium, which is a computer-readable storage medium used for computer-readable storage, and the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the vehicle high-voltage wire harness life prediction method as described above.

[0039] On the other hand, an embodiment of the present invention further provides a vehicle, the vehicle comprising the vehicle high-voltage wire harness life prediction system or electronic device as described above.

[0040] The advantages and beneficial effects of the present invention will be partly given in the following description, partly become apparent from the following description, or be understood through the practice of the present invention:

[0041] The embodiment of the present invention obtains first temperature data of the surface of the insulation layer of the target high-voltage wire harness, determines the temperature-operation time distribution data of the target high-voltage wire harness according to the first temperature data, determines multiple temperature intervals and corresponding interval operation times according to the temperature-operation time distribution data, obtains the preset Arrhenius model test temperature and the corresponding design operation time, determines the acceleration factor of each temperature interval according to the test temperature, and then predicts the equivalent operation time of the target high-voltage wire harness at the test temperature according to the acceleration factor and the interval operation time, and determines the remaining life of the target high-voltage wire harness according to the equivalent operation time and the design operation time. The embodiment of the present invention determines multiple temperature intervals and corresponding interval operation times according to the temperature-operation time distribution data of the target high-voltage wire harness, predicts the equivalent operation time of the target high-voltage wire harness at the test temperature in combination with the test temperature of the Arrhenius model, and thereby determines the remaining life of the target high-voltage wire harness based on the predicted equivalent operation time and the design operation time of the Arrhenius model, and can perform real-time and accurate reliability evaluation on the target high-voltage wire harness during vehicle driving, thereby improving the real-time and accuracy of vehicle high-voltage wire harness life prediction. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution in the embodiments of the present invention, the following introduction is made to the drawings required for use in the embodiments of the present invention. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solution of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 A flowchart of a method for predicting the life of a vehicle high-voltage wiring harness provided by an embodiment of the present invention;

[0044] Figure 2 A step flow chart of step S101 provided in an embodiment of the present invention;

[0045] Figure 3 A step flow chart of step S102 provided in an embodiment of the present invention;

[0046] Figure 4 A step flow chart of step S103 provided in an embodiment of the present invention;

[0047] Figure 5 Another step flow chart of step S103 provided in an embodiment of the present invention;

[0048] Figure 6 A step flow chart of step S104 provided in an embodiment of the present invention;

[0049] Figure 7Another step flow chart of the method for predicting the life of a vehicle high-voltage wiring harness provided by an embodiment of the present invention;

[0050] Figure 8 A schematic diagram of the structure of a vehicle high-voltage wire harness life prediction system provided by an embodiment of the present invention;

[0051] Fig. 9 A schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present invention;

[0052] Fig.10 A schematic diagram of the structure of a storage medium provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. It should be noted that, although the functional module division is performed in the system schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in a different order from the module division in the system schematic diagram or the flow chart. For the step numbers in the following embodiments, they are only set for the convenience of explanation, and the order between the steps is not limited in any way. The execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0054] In the description of the present invention, the meaning of "a plurality" is two or more. If there is a description of the first or the second, it is only for the purpose of distinguishing the technical features, and it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. In addition, unless otherwise defined, all technical and scientific terms used in this document have the same meaning as those commonly understood by technicians in the technical field of this application. The terms used in this document are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0055] The vehicle high-voltage wire harness life prediction method provided in the embodiment of the present application can be applied to the terminal, can also be applied to the server side, and can also be software running in the terminal or the server side. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a set-top box, etc.; the server side can be configured as an independent physical server, or a server cluster or distributed system composed of multiple physical servers, and can also be configured as a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms; the software can be an application that implements the vehicle high-voltage wire harness life prediction method, etc., but is not limited to the above forms.

[0056] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments, in which tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0057] It should be noted that in each specific implementation of the present application, when it comes to the need to perform relevant processing based on data related to user identity or characteristics such as user information, user behavior data, user historical data, and user location information, the user's permission or consent will be obtained first, and the collection, use, and processing of these data will comply with the relevant laws, regulations, and standards of the relevant countries and regions. In addition, when the embodiment of the present application needs to obtain the user's sensitive personal information, the user's separate permission or consent will be obtained through a pop-up window or by jumping to a confirmation page. After clearly obtaining the user's separate permission or consent, the necessary user-related data for the normal operation of the embodiment of the present application will be obtained.

[0058] like Figure 1 FIG. 1 is a flow chart showing a method for predicting the life of a vehicle high voltage wiring harness according to an embodiment of the present invention. Figure 1 The embodiment of the present invention provides a method for predicting the life of a vehicle high-voltage wiring harness, which specifically includes the following steps:

[0059] S101 . Acquire first temperature data of a surface of an insulation layer of a target high-voltage wire harness.

[0060] like Figure 2 FIG. 1 is a flowchart of step S101 provided in an embodiment of the present invention, referring to FIG. Figure 2 As an optional implementation, first temperature data of the surface of the insulation layer of the target high-voltage wire harness is obtained, which is specifically:

[0061] S1011. Acquire first temperature data of the surface of the insulation layer of the target high-voltage wire harness through a temperature sensor, wherein the temperature sensor is disposed in a plurality of pre-calibrated high-temperature regions of the target high-voltage wire harness.

[0062] Specifically, the harness temperatures of various areas of a vehicle's high-voltage harness are not consistent, and the service life of the high-voltage harness in a high-temperature area will be shorter, becoming a factor restricting the overall service life of the vehicle's high-voltage harness. Therefore, an embodiment of the present invention pre-calibrates multiple high-temperature areas of a target high-voltage harness through thermal damage analysis, and performs temperature monitoring on the high-voltage harness in the calibrated high-temperature areas to obtain first temperature data, which is used for subsequent prediction of the equivalent operating time of the target high-voltage harness in a test environment.

[0063] S102 : determining temperature-operation time distribution data of a target high-voltage wire harness according to the first temperature data, and determining a plurality of temperature intervals and corresponding interval operation times according to the temperature-operation time distribution data.

[0064] like Figure 3 FIG. 1 is a flow chart of step S102 provided in an embodiment of the present invention, referring to FIG. Figure 3 As an optional implementation, the temperature-operation time distribution data of the target high-voltage wiring harness is determined according to the first temperature data, and a plurality of temperature intervals and corresponding interval operation times are determined according to the temperature-operation time distribution data, which specifically includes:

[0065] S1021, uploading the first temperature data to the cloud platform through the vehicle controller;

[0066] S1022, performing denoising, frequency alignment, and interpolation processing on the first temperature data through the cloud platform to obtain second temperature data showing that the temperature of the surface of the insulation layer of the target high-voltage wire harness changes with time, and using the second temperature data as temperature-operating time distribution data;

[0067] S1023, determining multiple temperature intervals, segmenting the temperature-operating time distribution data according to the temperature intervals, obtaining a number of operating time segments corresponding to each temperature interval, and then determining the interval operating time corresponding to each temperature interval according to the total duration of the operating time segments.

[0068] Specifically, the vehicle controller obtains first temperature data through a temperature sensor, and then uploads it to the cloud platform via T-BOX. The cloud platform denoises the first temperature data to eliminate invalid data, aligns frequencies, and interpolates to complete missing data, thereby obtaining temperature-operating time distribution data of the surface temperature of the insulation layer of the target high-voltage wire harness that changes with time; multiple temperature intervals are determined according to a preset temperature difference value, such as [0, 10℃], [10℃, 20℃], and [20℃, 30℃], etc. (this is only an example, in order to improve the accuracy of the prediction, the temperature interval with a smaller temperature difference span can be divided), and the temperature-operating time distribution data is segmented based on the determined temperature interval to obtain one or more operating time segments corresponding to each temperature interval, and then the interval operating time of each temperature interval can be determined according to the total duration of the operating time segments corresponding to each temperature interval. The interval operating time actually represents the total duration of the target high-voltage wire harness working in the corresponding temperature interval.

[0069] S103, obtaining the preset Arrhenius model test temperature and the corresponding design operation time, determining the acceleration factor of each temperature interval according to the test temperature, and then predicting the equivalent operation time of the target high-voltage wiring harness at the test temperature according to the acceleration factor and the interval operation time.

[0070] Specifically, the accelerated life test uses the life characteristics of the product under high stress to extrapolate the life characteristics under normal stress, and the Arrhenius model is the most typical and widely used model when using temperature stress test. In the embodiment of the present invention, the vehicle high-voltage wire harness is subjected to an accelerated life test based on the Arrhenius model in advance during vehicle styling design, and the test temperature and the corresponding design operation time are recorded at the same time.

[0071] like Figure 4 FIG. 1 is a flow chart of step S103 provided in an embodiment of the present invention, referring to FIG. Figure 4 As an optional implementation, the acceleration factor of each temperature interval is determined according to the test temperature, which specifically includes:

[0072] S1031, obtaining preset activation energy parameters of the high-voltage wire harness;

[0073] S1032, taking the median temperature of each temperature interval as the actual temperature of the corresponding temperature interval;

[0074] S1033. Calculate the acceleration factor for each temperature range based on the activation energy parameters of the high-voltage wire harness, the test temperature, the actual temperature, and the acceleration factor formula of the Arrhenius model.

[0075] Specifically, from the relevant theories of accelerated life test and Arrhenius model, it can be known that, assuming that the life and temperature of the vehicle high-voltage wiring harness in the actual operating state are t1 and T1 respectively, and the life and temperature in the accelerated life test state are t2 and T2 respectively, then according to the acceleration factor formula of the Arrhenius model, the acceleration factor a can be calculated as follows:

[0076]

[0077] Wherein, E represents the preset high-voltage harness activation energy parameter, and R represents the Boltzmann constant.

[0078] In the embodiment of the present invention, the median temperature of each temperature interval is taken as the actual temperature T1 of the corresponding temperature interval, and the acceleration factor a corresponding to each temperature interval can be calculated by combining the test temperature T2 of the accelerated life test based on the Arrhenius model, the preset high-voltage wire harness activation energy parameter E (which can be obtained by fitting multiple test data) and the Boltzmann constant R. It can be understood that the acceleration factor actually reflects the degree of acceleration of the life consumption of the target high-voltage wire harness under the accelerated life test state relative to the normal operation state under the corresponding temperature interval.

[0079] like Figure 5 FIG. 1 is another step flow chart of step S103 provided in an embodiment of the present invention, referring to FIG. Figure 5 As an optional implementation, the equivalent operation time of the target high-voltage wiring harness at the test temperature is predicted according to the acceleration factor and the interval operation time, which specifically includes:

[0080] S1034, predicting the interval equivalent running time of the corresponding temperature interval according to the acceleration factor and the interval running time;

[0081] S1035. Determine the equivalent operating time of the target high-voltage wiring harness at the test temperature according to the sum of the equivalent operating times of the temperature intervals.

[0082] Specifically, according to the acceleration factor formula of the aforementioned Arrhenius model, for each temperature range, the life t1 of the vehicle high-voltage wiring harness in the operating state in the temperature range and the life t2 in the accelerated life test state have the following relationship:

[0083]

[0084] Therefore, the interval equivalent running time of the corresponding temperature interval can be predicted based on the acceleration factor and interval running time of each temperature interval:

[0085]

[0086] Among them, t inrepresents the equivalent operating time of temperature interval i, t im represents the interval running time of temperature interval i, a i Represents the acceleration factor corresponding to temperature interval i.

[0087] It can be understood that the significance of the interval equivalent operating time is that when the operating time of the vehicle high-voltage wiring harness in the corresponding temperature range reaches the interval operating time, the degree of life consumption of the vehicle high-voltage wiring harness can be equivalent to the degree of life consumption when the operating time of the vehicle high-voltage wiring harness under the accelerated life test state reaches the interval equivalent operating time.

[0088] After calculating the equivalent operating time of each temperature interval, the total equivalent operating time t of the target high-voltage wiring harness at the test temperature can be obtained by summing them up. n :

[0089]

[0090] It should be noted that the calculation of the equivalent operating time is a cumulative process, that is, after the vehicle leaves the factory, each operation will consume the service life of the vehicle's high-voltage wiring harness. Therefore, each operation will predict the corresponding equivalent operating time through temperature monitoring and store it. In the subsequent operation process, not only the equivalent operating time of the current operation needs to be considered, but also the equivalent operating time before the current operation. The two are added together to obtain the equivalent operating time of the target high-voltage wiring harness from leaving the factory to the current moment.

[0091] S104: Determine the remaining life of the target high-voltage wire harness according to the equivalent operating time and the designed operating time.

[0092] Specifically, the equivalent operating time reflects the actual operating time of the target high-voltage wiring harness corresponding to the test operating time in the accelerated life test. The embodiment of the present invention pre-determines the design operating time of the target high-voltage wiring harness (i.e., the service life under the accelerated life test state) through an accelerated life test based on the Arrhenius model. The remaining life of the target high-voltage wiring harness can be determined by comparing the equivalent operating time with the design operating time.

[0093] like Figure 6 FIG. 1 is a flowchart of step S104 provided in an embodiment of the present invention, referring to FIG. Figure 6 As an optional implementation, the remaining life of the target high-voltage wiring harness is determined according to the equivalent operating time and the designed operating time, which specifically includes:

[0094] S1041. Determine the operating time proportion of the target high-voltage wiring harness according to the ratio of the equivalent operating time to the designed operating time;

[0095] S1042, determining the actual operation time of the target high-voltage wire harness according to the sum of the interval operation time of each temperature interval;

[0096] S1043: predicting the actual service life of the target high-voltage wire harness according to the actual operating time and the operating time ratio, and then determining the remaining service life of the target high-voltage wire harness according to the difference between the actual service life and the actual operating time.

[0097] Specifically, the operating time ratio of the target high-voltage wiring harness is determined according to the ratio of the equivalent operating time to the designed operating time, and the operating time ratio can reflect the degree of consumption of the service life of the target high-voltage wiring harness; the actual operating time of the target high-voltage wiring harness is determined according to the sum of the interval operating time of each temperature interval, and the actual operating time represents the operating time of the target high-voltage wiring harness. If this operation is not the first operation after leaving the factory, the actual operating time of each previous operation must be added; the actual service life of the target high-voltage wiring harness can be predicted by dividing the actual operating time by the operating time ratio, and the remaining life of the target high-voltage wiring harness can be determined according to the difference between the actual service life and the actual operating time.

[0098] like Figure 7 FIG. 1 is another flow chart of the method for predicting the life of a vehicle high voltage wiring harness according to an embodiment of the present invention. Figure 7 As an optional implementation, the vehicle high voltage harness life prediction method further includes the following steps:

[0099] S105: When the equivalent operation time is greater than or equal to a preset first threshold, or the operation time proportion is greater than or equal to a preset second threshold, high-voltage wire harness maintenance warning information is generated.

[0100] Specifically, a threshold of equivalent operating time or a threshold of operating time percentage can be set in advance. When the equivalent operating time or the operating time percentage reaches the corresponding threshold, it means that the service life of the vehicle's high-voltage wiring harness has reached a preset warning value. A high-voltage wiring harness maintenance warning message can be generated to remind the owner to repair and maintain the vehicle's high-voltage wiring harness.

[0101] The above is a description of the method steps of the embodiment of the present invention. The following is a further description of the specific implementation process of the embodiment of the present invention in conjunction with a specific embodiment.

[0102] The embodiment of the present invention deploys a high-voltage wire harness temperature sensor, a vehicle control unit, an instrument, a T-BOX, a big data service platform, and an after-sales operation and maintenance platform. During the operation of the vehicle, the vehicle control unit samples the temperature of the potential highest temperature area of ​​the high-voltage wire harness, and uploads the temperature data to the big data service platform via the T-BOX. The after-sales operation and maintenance platform extracts and processes data, establishes a calculation model, and outputs the high-voltage wire harness life prediction result. The instrument outputs the high-voltage wire harness maintenance warning information.

[0103] The specific process is as follows:

[0104] During the vehicle operation phase, the vehicle control unit first passes the self-test and enters step 1);

[0105] Step 1): The vehicle control unit determines whether the resistance value of the high-voltage wire harness temperature sensor is within a set range. If not, jump to step 12);

[0106] Step 2): The vehicle control unit uploads the high-voltage wiring harness temperature to the T-BOX;

[0107] Step 3): T-BOX uploads the high-voltage wire harness temperature to the big data service platform;

[0108] Step 4): The after-sales operation and maintenance platform extracts the high-voltage wire harness temperature data from the big data service platform;

[0109] Step 5): The after-sales operation and maintenance platform processes the high-voltage wire harness temperature fragments, removes invalid data, aligns frequencies, interpolates empty data, and sets segmented data fragments based on the computing power of the after-sales operation and maintenance platform;

[0110] Step 6): The after-sales operation and maintenance platform counts the operating time distribution of the high-voltage wire harness in different temperature ranges;

[0111] Step 7): Import the operating time distribution obtained in step 6) into the Arrhenius model temperature concentration distribution, the test temperature is the temperature set according to the high temperature durability design life, and calculate the equivalent operating time based on the test temperature;

[0112] Step 8): The after-sales operation and maintenance platform calculates the equivalent operating time of the high-voltage wiring harness temperature based on the test temperature, and calculates the proportion of the designed operating time;

[0113] Step 9): The after-sales operation and maintenance platform determines whether the set maintenance equivalent operation time has been reached;

[0114] Step 10): The after-sales operation and maintenance platform sends the high-voltage wiring harness maintenance information to the vehicle control unit;

[0115] Step 11): The instrument displays high-voltage harness maintenance information to the user.

[0116] It can be understood that the embodiment of the present invention determines multiple temperature intervals and corresponding interval operating times based on the temperature-operating time distribution data of the target high-voltage wire harness, and predicts the equivalent operating time of the target high-voltage wire harness at the test temperature in combination with the test temperature of the Arrhenius model, thereby determining the remaining life of the target high-voltage wire harness based on the predicted equivalent operating time and the design operating time of the Arrhenius model, and can perform real-time and accurate reliability evaluation of the target high-voltage wire harness during vehicle driving, thereby improving the real-time and accuracy of vehicle high-voltage wire harness life prediction.

[0117] The embodiments of the present invention also have the following advantages over the prior art:

[0118] 1) By distributing temperature points in the heat damage area of ​​the high-voltage wiring harness on hybrid vehicles, the situation of the area susceptible to heat damage of the high-voltage wiring harness can be more accurately controlled, which is helpful for the refined design of the heat damage protection of the high-voltage wiring harness, the lightweight design of the high-voltage wiring harness, and the extension of the service life of the high-voltage wiring harness. The life of the high-voltage wiring harness can be predicted more accurately.

[0119] 2) Through big data analysis, develop personalized maintenance plans based on user habits.

[0120] 3) Provide data support for the residual value of high-voltage wire harnesses by analyzing the ratio of predicted life to design life.

[0121] like Figure 8 FIG. 1 is a schematic diagram of a vehicle high voltage harness life prediction system according to an embodiment of the present invention. Figure 8 The embodiment of the present invention provides a vehicle high voltage wire harness life prediction system, comprising:

[0122] A data acquisition module, used to acquire first temperature data of the surface of the insulation layer of the target high-voltage wire harness;

[0123] A data processing module, used to determine temperature-operation time distribution data of the target high-voltage wire harness according to the first temperature data, and determine a plurality of temperature intervals and corresponding interval operation times according to the temperature-operation time distribution data;

[0124] The equivalent operation time prediction module is used to obtain the test temperature and corresponding design operation time of the preset Arrhenius model, determine the acceleration factor of each temperature interval according to the test temperature, and then predict the equivalent operation time of the target high-voltage wiring harness at the test temperature according to the acceleration factor and the interval operation time;

[0125] The remaining life determination module is used to determine the remaining life of the target high-voltage wiring harness according to the equivalent operating time and the designed operating time.

[0126] The contents of the above method embodiments are all applicable to the present system embodiments. The functions specifically implemented by the present system embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0127] The embodiment of the present invention also provides an electronic device, which includes: a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection and communication between the processor and the memory, and the program is executed by the processor to realize the above-mentioned vehicle high-voltage wire harness life prediction method. The electronic device can be any intelligent terminal including a tablet computer, a vehicle-mounted computer, etc.

[0128] like Fig. 9 FIG. 1 is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present invention. Fig. 9 , an embodiment of the present invention provides an electronic device, including:

[0129] The processor 901 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present invention;

[0130] The memory 902 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 902 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 902, and the processor 901 calls and executes the vehicle high-voltage wire harness life prediction method of the embodiment of the present invention;

[0131] Input / output interface 903, used to implement information input and output;

[0132] Communication interface 904, used to realize communication interaction between the device and other devices, which can be realized by wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.);

[0133] A bus 905 that transmits information between various components of the device (e.g., the processor 901, the memory 902, the input / output interface 903, and the communication interface 904);

[0134] The processor 901 , the memory 902 , the input / output interface 903 and the communication interface 904 are connected to each other in communication within the device via a bus 905 .

[0135] like Fig.10 FIG. 1 is a schematic diagram of a storage medium according to an embodiment of the present invention. Fig.10 The embodiment of the present invention further provides a storage medium, which is a computer-readable storage medium used for computer-readable storage. The storage medium stores one or more programs 1001, and the one or more programs 1001 can be executed by one or more processors to implement the above-mentioned vehicle high-voltage wire harness life prediction method.

[0136] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0137] An embodiment of the present invention further provides a vehicle, the vehicle comprising the above-mentioned vehicle high-voltage wire harness life prediction system or an electric drive assembly of an electronic device.

[0138] Specifically, the vehicle may be a private car, such as a sedan, SUV, MPV or pickup truck.

[0139] The embodiment of the present invention further provides a computer program product or a computer program, wherein the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes Figure 1 The method shown.

[0140] In some selectable embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the above-mentioned boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the present invention is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Selectable embodiments are expected, wherein the order of various operations is changed and the sub-operation of a part for which is described as a larger operation is performed independently.

[0141] In addition, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise specified to the contrary, one or more of the above-mentioned functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the present invention. More specifically, in view of the properties, functions and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the conventional skills of the engineer. Therefore, those skilled in the art can implement the present invention set forth in the claims without excessive experimentation using ordinary techniques. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, which is determined by the full scope of the appended claims and their equivalents.

[0142] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the above methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0143] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0144] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and editable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the above-mentioned program is printed, since the above-mentioned program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or processing in other suitable ways as necessary, and then stored in a computer memory.

[0145] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0146] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0147] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0148] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for predicting the life of a vehicle high-voltage wiring harness, characterized in that: The following steps are involved: Acquiring first temperature data of the surface of the insulation layer of the target high-voltage wire harness; Determining temperature-operation time distribution data of the target high-voltage wire harness according to the first temperature data, and determining a plurality of temperature intervals and corresponding interval operation times according to the temperature-operation time distribution data; Obtaining a preset Arrhenius model test temperature and a corresponding design operating time, determining an acceleration factor for each temperature interval according to the test temperature, and then predicting an equivalent operating time of the target high-voltage wiring harness at the test temperature according to the acceleration factor and the interval operating time; The remaining life of the target high-voltage wire harness is determined according to the equivalent operating time and the designed operating time.

2. A vehicle high voltage wire harness life prediction method according to claim 1, characterized in that: The first temperature data of the surface of the insulation layer of the target high-voltage wire harness is obtained, which is specifically: The first temperature data of the surface of the insulation layer of the target high-voltage wire harness is acquired by a temperature sensor, and the temperature sensor is arranged in a plurality of pre-calibrated high-temperature areas of the target high-voltage wire harness.

3. A vehicle high voltage wire harness life prediction method according to claim 1, characterized in that: Determining the temperature-operation time distribution data of the target high-voltage wire harness according to the first temperature data, and determining a plurality of temperature intervals and corresponding interval operation times according to the temperature-operation time distribution data, specifically includes: Uploading the first temperature data to the cloud platform through the vehicle controller; De-noising, frequency alignment and interpolation processing are performed on the first temperature data through the cloud platform to obtain second temperature data showing that the temperature of the surface of the insulation layer of the target high-voltage wire harness changes with time, and the second temperature data is used as the temperature-operating time distribution data; Determine multiple temperature intervals, segment the temperature-operating time distribution data according to the temperature intervals, obtain a number of operating time segments corresponding to each temperature interval, and then determine the interval operating time corresponding to each temperature interval according to the total duration of the operating time segments.

4. A vehicle high voltage wire harness life prediction method according to claim 1, characterized in that: Determining the acceleration factor of each temperature interval according to the test temperature specifically includes: Obtain preset activation energy parameters of high-voltage wiring harness; Taking the median temperature of each temperature interval as the actual temperature of the corresponding temperature interval; The acceleration factor in each temperature range is calculated based on the activation energy parameter of the high-voltage wire harness, the test temperature, the actual temperature and the acceleration factor formula of the Arrhenius model.

5. A vehicle high voltage wire harness life prediction method according to claim 1, characterized in that: The step of predicting the equivalent operating time of the target high-voltage wiring harness at the test temperature according to the acceleration factor and the interval operating time specifically includes: Predicting the interval equivalent running time of the corresponding temperature interval according to the acceleration factor and the interval running time; The equivalent operation time of the target high-voltage wire harness at the test temperature is determined according to the sum of the equivalent operation times in each of the temperature intervals.

6. A vehicle high voltage wire harness life prediction method according to any one of claims 1 to 5, characterized in that: The determining the remaining life of the target high-voltage wiring harness according to the equivalent operating time and the designed operating time specifically includes: Determining the operating time proportion of the target high-voltage wiring harness according to the ratio of the equivalent operating time to the designed operating time; Determining the actual operation time of the target high-voltage wiring harness according to the sum of the interval operation time of each temperature interval; The actual service life of the target high-voltage wire harness is predicted according to the actual operating time and the operating time ratio, and then the remaining life of the target high-voltage wire harness is determined according to the difference between the actual service life and the actual operating time.

7. A vehicle high voltage wire harness life prediction method according to claim 6, characterized in that: The vehicle high voltage wire harness life prediction method further comprises the following steps: When the equivalent operating time is greater than or equal to a preset first threshold, or the operating time proportion is greater than or equal to a preset second threshold, high-voltage wire harness maintenance warning information is generated.

8. A vehicle high voltage harness life prediction system, characterized in that: include: A data acquisition module, used to acquire first temperature data of the surface of the insulation layer of the target high-voltage wire harness; a data processing module, configured to determine temperature-operation time distribution data of the target high-voltage wiring harness according to the first temperature data, and determine a plurality of temperature intervals and corresponding interval operation times according to the temperature-operation time distribution data; An equivalent operation time prediction module, used to obtain a preset Arrhenius model test temperature and a corresponding design operation time, determine an acceleration factor for each temperature interval according to the test temperature, and then predict the equivalent operation time of the target high-voltage wiring harness at the test temperature according to the acceleration factor and the interval operation time; The remaining life determination module is used to determine the remaining life of the target high-voltage wire harness according to the equivalent operating time and the designed operating time.

9. An electronic device, characterized in that: The electronic device includes a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection and communication between the processor and the memory. When the program is executed by the processor, the steps of the vehicle high-voltage wire harness life prediction method as described in any one of claims 1 to 7 are realized.

10. A storage medium, the storage medium being a computer-readable storage medium, used for computer-readable storage, characterized in that: The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of the vehicle high-voltage wire harness life prediction method as described in any one of claims 1 to 7.

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