CN108181110A - New-energy automobile vehicle monitor terminal life testing method based on Arrhenius models - Google Patents
New-energy automobile vehicle monitor terminal life testing method based on Arrhenius models Download PDFInfo
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- CN108181110A CN108181110A CN201711348314.0A CN201711348314A CN108181110A CN 108181110 A CN108181110 A CN 108181110A CN 201711348314 A CN201711348314 A CN 201711348314A CN 108181110 A CN108181110 A CN 108181110A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
Abstract
The present invention proposes a kind of new-energy automobile vehicle monitor terminal life testing method based on Arrhenius models, it is characterized in that, product is generally in actual use in the temperature environment of multiple variations, generally chooses several typical temperature spots by counting；Arrhenius models are the mathematical model to life of product impact analysis based on temperature stress；Generally use hot test carries out the accelerated ageing of product.The present invention with reference to the characteristic feature of vehicle monitor terminal, formulates corresponding differentiation testing program, accelerating aging test is carried out to it by analyzing its mathematical model, to shorten the test period, improves test efficiency, reduces experimentation cost.
Description
Technical field
The present invention relates to a kind of new-energy automobile vehicle monitor terminal life testing methods based on Arrhenius models.
Background technology
" safely " it is that new-energy automobile is developed so far the topic that temperature does not subtract still.In order to strengthen to new-energy automobile safety
The monitoring of operation by collection vehicle condition real time data, effectively can reduce or exclude vehicle and run potential security risk, really
Consumer safety is protected to use.The end of the year in 2016, China issue and implement " electric vehicle remote service and management systems technology rule
Model " series standard, and require all new-energy automobiles that the vehicle monitor terminal for meeting the standard is installed.Vehicle monitor terminal passes through
The modes collection vehicle real-time running data such as CAN bus, is stored and is uploaded to management platform by modes such as GSM.
Vehicle monitor terminal is the data source for realizing new-energy automobile security control, and importance is self-evident, thus requires vehicle-mounted
Monitor terminal reliable and stable operation in defined life cycle, it is particularly necessary to the research of its life characteristics.Standard requires vehicle
The least life of monitor terminal is carried as 5 years, however, in the actual development verification test of product, when can not expend so long
Between verify its life characteristic, in this way, not only the test period is very long, and experimentation cost is higher, less efficient, seriously affect production
Product being designed and developed and promoting and applying.
Invention content
In view of this, a kind of new-energy automobile vehicle monitor terminal longevity based on Arrhenius models proposed by the present invention
Test method is ordered, according to all kinds of mathematical models and the typical feature of vehicle monitor terminal, corresponding testing program is formulated, as far as possible
The life characteristic of vehicle monitor terminal is effectively assessed in the short period.
A kind of new-energy automobile vehicle monitor terminal life testing method based on Arrhenius models, product is in reality
It is generally in during use in the temperature environment of multiple variations, generally chooses several typical temperature spots by counting；
Arrhenius models are the mathematical model to life of product impact analysis based on temperature stress；Generally use hot test come into
The accelerated ageing of row product, the accelerated factor algorithm under some temperature spot are as follows：
In formula：The activation energy of EA- product failure reactions, eV is related to product characteristic, the typical case of electronic building brick class product
Value is 0.45eV；K- Boltzmann constants, value are 8.617 × 10eV/ DEG C；Selection adds during TPruf- progress accelerated tests
Fast temperature value generally corresponds to the maximum operating temperature of product or maximum storage temperature value；TFeld, i- product are in actual use ring
Some the representative temperature value chosen in border；
Thus, it may be determined that the accelerated factor under each representative temperature value；In design experiment, the production can be determined according to the following formula
The product final accelerated aging test time：
In formula：tPrufThe accelerated aging test time；tLifeProduct design life time；Pi- product practical service environment temperature
The statistical implantation of the representative temperature value, is generally expressed as a percentage in degree distribution；
It is calculated based on Arrhenius models accelerated test：Assuming that average daily vehicle usage time is 1.5h, i.e., it is vehicle-mounted
The monitor terminal daily working time is 1.5h, therefore, within vehicle monitor terminal period projected life of 5 years, real work
Time is 2737.5h, i.e., 5 (year) × 365 (my god) × 1.5h, this is tLifeValue.Set accelerated aging test temperature value as
Maximum operating temperature, i.e., 80 DEG C.
In order to which the service life to vehicle monitor terminal this new-energy automobile security control critical component is assessed, to ensure
It can provide reliable and stable work in the statement period, herein by experiment of high-temperature load of the introducing based on Arrhenius models
Common physics accelerated aging test, on the basis of its mathematical model is analyzed, corresponding testing program is formulated, by it
Mathematical model is analyzed, and with reference to the characteristic feature of vehicle monitor terminal, formulates corresponding differentiation testing program, it is carried out
Accelerating aging test to shorten the test period, improves test efficiency, reduces experimentation cost.
Specific embodiment
The present invention is got information about for those skilled in the art is allowed to be more clear, the present invention will be made below further
Explanation.
A kind of new-energy automobile vehicle monitor terminal life testing method based on Arrhenius models, product is in reality
It is generally in during use in the temperature environment of multiple variations, generally chooses several typical temperature spots by counting；
Arrhenius models are the mathematical model to life of product impact analysis based on temperature stress；Generally use hot test come into
The accelerated ageing of row product, the accelerated factor algorithm under some temperature spot are as follows：
In formula：The activation energy of EA- product failure reactions, eV is related to product characteristic, the typical case of electronic building brick class product
Value is 0.45eV；K- Boltzmann constants, value are 8.617 × 10eV/ DEG C；Selection adds during TPruf- progress accelerated tests
Fast temperature value generally corresponds to the maximum operating temperature of product or maximum storage temperature value；TFeld, i- product are in actual use ring
Some the representative temperature value chosen in border；
Thus, it may be determined that the accelerated factor under each representative temperature value；In design experiment, the production can be determined according to the following formula
The product final accelerated aging test time：
In formula：tPrufThe accelerated aging test time；tLifeProduct design life time；Pi- product practical service environment temperature
The statistical implantation of the representative temperature value, is generally expressed as a percentage in degree distribution；
It is calculated based on Arrhenius models accelerated test：Assuming that average daily vehicle usage time is 1.5h, i.e., it is vehicle-mounted
The monitor terminal daily working time is 1.5h, therefore, within vehicle monitor terminal period projected life of 5 years, real work
Time is 2737.5h, i.e., 5 (year) × 365 (my god) × 1.5h, this is tLifeValue.Set accelerated aging test temperature value as
Maximum operating temperature, i.e., 80 DEG C.The distribution of passenger compartment representative temperature is as shown in table 1, is obtained under each representative temperature value according to formula (1)
Accelerated factor it is as shown in table 1.
1 representative temperature of table is distributed and its accelerated factor：
Thus, accelerated test time of the vehicle monitor terminal based on Arrhenius models can be calculated according to formula (2)
For 505.5h.
Verification experimental verification
In order to verify the validity of the accelerated aging test method based on above-mentioned model in text, encapsulated from a collection of aluminium casing
Vehicle monitor terminal sample in randomly select 3 samples of A, B, C and carry out accelerated aging tests according to 3 kinds of accelerated methods respectively.
In order to carry out Experimental Comparison, humiture case that 3 experiments select specification performance parameter identical, warm variable Rate can reach 4 DEG C/
Min can meet requirement of the Coffin-Manson models to warm variable Rate；Temperature range is -40~150 DEG C, can cover 3 classes and add
The temperature requirement of speed experiment；Humidity range is 10%RH~98%RH, can meet requirement of the Lawson models to humidity range, case
The space of body is 1m.Functional test is carried out to 3 samples first before experiment, function is in A as defined in ISO 16750-1
Grade.
A products its function of repetition measurement after the Arrhenius high temperature accelerated aging tests of experience about 506h, still in A grades；B
Product its function of repetition measurement after the Coffin-Manson temperature alternating accelerated aging tests of experience about 270h, still in A grades；C is produced
Product its function of repetition measurement after the Lawson Steadydamp-heat accelerated aging tests of experience about 339h, still in A grades.It thus is seen that
Accelerated ageing effect is under the premise of, the temperature alternating accelerated aging test method based on Coffin-Manson models, takes
Shorter, cost is lower.
In order to which the service life to vehicle monitor terminal this new-energy automobile security control critical component is assessed, to ensure
It can provide reliable and stable work in the statement period, herein by experiment of high-temperature load of the introducing based on Arrhenius models
Common physics accelerated aging test, on the basis of its mathematical model is analyzed, corresponding testing program is formulated, by it
Mathematical model is analyzed, and with reference to the characteristic feature of vehicle monitor terminal, formulates corresponding differentiation testing program, it is carried out
Accelerating aging test to shorten the test period, improves test efficiency, reduces experimentation cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (1)
- A kind of 1. new-energy automobile vehicle monitor terminal life testing method based on Arrhenius models, which is characterized in that production Product are generally in actual use in the temperature environment of multiple variations, generally choose several typical temperature by counting Point；Arrhenius models are the mathematical model to life of product impact analysis based on temperature stress；Generally use hot test comes The accelerated ageing of product is carried out, the accelerated factor algorithm under some temperature spot is as follows：In formula：The activation energy of EA- product failure reactions, eV is related to product characteristic, the typical value of electronic building brick class product For 0.45eV；K- Boltzmann constants, value are 8.617 × 10eV/ DEG C；TPruf- carries out the acceleration temperature of selection during accelerated test Angle value generally corresponds to the maximum operating temperature of product or maximum storage temperature value；TFeld, i- product are in practical service environment Some the representative temperature value chosen；Thus, it may be determined that the accelerated factor under each representative temperature value；In design experiment, the product can be determined most according to the following formula The whole accelerated aging test time：In formula：tPrufThe accelerated aging test time；tLifeProduct design life time；Pi- product practical service environments temperature point The statistical implantation of the representative temperature value, is generally expressed as a percentage in cloth；It is calculated based on Arrhenius models accelerated test：Assuming that average daily vehicle usage time is 1.5h, i.e. vehicle-mounted monitoring The terminal daily working time is 1.5h, therefore, within vehicle monitor terminal period projected life of 5 years, running time For 2737.5h, i.e., 5 (year) × 365 (my god) × 1.5h, this is tLifeValue.Accelerated aging test temperature value is set as highest Operating temperature, i.e., 80 DEG C.
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Cited By (4)
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| CN110763942A (en) * | 2019-11-18 | 2020-02-07 | 许继变压器有限公司 | Method and device for detecting residual life of dry-type transformer |
| CN111208447A (en) * | 2020-03-06 | 2020-05-29 | 上海度普新能源科技有限公司 | Power module test system |
| CN112834943A (en) * | 2019-11-25 | 2021-05-25 | 郑州宇通集团有限公司 | Method and device for testing service life of battery management system based on high-temperature endurance test |
| CN113447237A (en) * | 2021-06-08 | 2021-09-28 | 奇瑞汽车股份有限公司 | Reliability test method of vehicle-mounted fatigue monitoring system |
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| CN112834943A (en) * | 2019-11-25 | 2021-05-25 | 郑州宇通集团有限公司 | Method and device for testing service life of battery management system based on high-temperature endurance test |
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| CN113447237A (en) * | 2021-06-08 | 2021-09-28 | 奇瑞汽车股份有限公司 | Reliability test method of vehicle-mounted fatigue monitoring system |
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