CN109212340A - A kind of charging equipment acceleration service life test method and device - Google Patents
A kind of charging equipment acceleration service life test method and device Download PDFInfo
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- CN109212340A CN109212340A CN201710525931.7A CN201710525931A CN109212340A CN 109212340 A CN109212340 A CN 109212340A CN 201710525931 A CN201710525931 A CN 201710525931A CN 109212340 A CN109212340 A CN 109212340A
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- charging equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The present invention provides a kind of charging equipment acceleration service life test method and device, acceleration service life test method is according to time projected life of charging equipment, reliability and the relationship of failure number is allowed to calculate the routine test time of single charging equipment；The temperature for influencing the charging equipment service life is chosen as accelerated stress, the size of Temperature Accelerating Factor in Life Test is calculated, the life test time of single charging equipment is calculated according to the routine test time of Temperature Accelerating Factor in Life Test and single charging equipment；Cyclic test is carried out until reaching the accelerated aging time to charging equipment according to the temperature variation curve of setting, judges whether charging equipment fails.Method of the invention can significantly shorten the test life time of charging equipment, improve life test efficiency, and improve the reliability of charging equipment life tests, it is thus identified that the service life of charging equipment provides theoretical foundation for the design of charging equipment.
Description
Technical field
The invention belongs to electric vehicle charging apparatus field, in particular to a kind of charging equipment acceleration service life test method and
Device.
Background technique
As national policy guiding is gradually goed deep into, the market share of new energy electric motor vehicle increases year by year, and electric vehicle is to charging
The demand of equipment is increasing, and the charging equipment of better performances largely affects the course continuation mileage of vehicle, so, it is right
The requirement of charging equipment is higher and higher, and the service life for verifying charging equipment becomes a kind of necessity, and charging equipment manufacturer passes through examination
It tests to verify the service life of charging equipment, to ensure its product competitiveness, at present, function items has only been carried out to charging equipment
Detection, the judgement to the service life is that experience obtains, not pass through actual verification experimental verification, the judgement in charging equipment service life is deposited
In larger unreliability；Also there are through conventional life test the service life for monitoring charging equipment, ordinary life examination in the prior art
It tests and complete simulation test is carried out according to the true actual operating mode of charging equipment, as a result accuracy with higher, but try
It is longer to test the time, needs to expend a large amount of manpower, financial resources and material resources, therefore, fills frequently with acceleration service life test method to detect
The service life of electric equipment.
Accelerated life test is an important branch of reliability test technology, and main theory is not change product
Under the premise of failure mechanism, the main material resources chemical process of enhanced products failure, i.e. increasing stress factor accelerate examination to reach
The purpose tested, to predict reliability and the service life of the product under normal running conditions.
Summary of the invention
The purpose of the present invention is to provide a kind of charging equipment acceleration service life test method and devices, for solving existing skill
The problem that the charging equipment life tests period is long in art and detection reliability is low.
To achieve the above object, the technical scheme is that
A kind of charging equipment acceleration service life test method, includes the following steps:
1) according to time projected life of charging equipment, reliability and the single charging equipment of relationship calculating for allowing failure number
The routine test time；
2) temperature for influencing the charging equipment service life is chosen as accelerated stress, calculates the size of Temperature Accelerating Factor in Life Test, according to
The routine test time of Temperature Accelerating Factor in Life Test and single charging equipment calculates the life test time of single charging equipment；
3) cyclic test is carried out to charging equipment according to the temperature variation curve of setting until when reaching accelerated life test
Between, judge whether charging equipment fails.
Further, after accelerated life test, if charging equipment does not fail, to the program-controlled function of the load of charging equipment
It can be carried out detection, tested by the ON/OFF load jump for carrying out setting cycle-index to charging equipment, loaded in ON state
It rises to 100% and is down to 0% again, judge whether charging equipment fails.
Further, plug test also is carried out to the charging gun of charging equipment, by being continually fed into charging gun to charging gun
Rated current carries out the plug test of setting number, judges whether the charging gun of charging equipment fails.
Further, multiple charging guns are carried out simultaneously with the end to end mode of latter charging gun by previous socket slotting
Pull out test.
Further, the Temperature Accelerating Factor in Life Test indicates are as follows:
Wherein, TEAFFor Temperature Accelerating Factor in Life Test, Δ TstressFor the rate temperature change under accelerated stress, Δ TnormalIt is positive
Rate temperature change under Chang Yingli.
Further, the life test time indicates are as follows:
Wherein, T ' is the life test time of individual equipment, and t is the test period of single charging equipment, TEAFFor temperature
Spend accelerated factor.
The present invention also provides a kind of charging equipment accelerated life test devices, including power supply, the program-controlled case of load and temperature
Case, the load of the power supply and the program-controlled case of load is for forming test loop with charging equipment, and the sweat box is for being arranged extremely
A few charging equipment to be measured, and temperature cycles variation, institute are carried out according to temperature variation curve in life test time
State the calculating process of life test time are as follows: according to time projected life of charging equipment, reliability and allow failure number
Relationship calculate routine test time of single charging equipment；The temperature for influencing the charging equipment service life is chosen as accelerated stress,
The size for calculating Temperature Accelerating Factor in Life Test calculates single charging according to the routine test time of accelerated factor and single charging equipment and sets
Standby life test time.
Further, after accelerated life test, also the load programmable function of charging equipment is detected, is passed through
The ON/OFF load jump test of setting cycle-index is carried out to charging equipment, load rises to 100% and is down to again in ON state
0%, judge whether charging equipment fails.
Further, plug test also is carried out to the charging gun of charging equipment, by being continually fed into charging gun to charging gun
Rated current carries out the plug test of setting number, judges whether the charging gun of charging equipment fails.
Further, multiple charging guns are carried out simultaneously with the end to end mode of latter charging gun by previous socket slotting
Pull out test.
The beneficial effects of the present invention are:
Acceleration service life test method of the invention is according to time projected life of charging equipment, reliability and allows failure number
Relationship calculate routine test time of single charging equipment；The temperature for influencing the charging equipment service life is chosen as accelerated stress,
The size for calculating Temperature Accelerating Factor in Life Test is calculated according to the routine test time of Temperature Accelerating Factor in Life Test and single charging equipment and is individually filled
The life test time of electric equipment；Cyclic test is carried out to charging equipment until reaching according to the temperature variation curve of setting
Life test time, judges whether charging equipment fails.Method of the invention can significantly shorten charging equipment
Test life time improves life test efficiency, and improves the reliability of charging equipment life tests, it is thus identified that charging is set
The standby service life provides theoretical foundation for the design of charging equipment.
Accelerated life test device of the invention, including power supply, the program-controlled case of load and sweat box, power supply and the program-controlled case of load
Load for forming test loop with charging equipment, sweat box is accelerating at least one charging equipment to be measured to be arranged
Temperature cycles variation is carried out according to temperature variation curve in test life time, accelerated life test device of the invention can be big
The test life time of the shortening charging equipment of amplitude, improves life test efficiency, and improve charging equipment life tests
Reliability, it is thus identified that the service life of charging equipment provides theoretical foundation for the design of charging equipment.
Detailed description of the invention
Fig. 1 is the testing equipment under temperature accelerated stress of the invention, sample connected mode schematic diagram；
Fig. 2 is warm varied curve figure of the invention；
Fig. 3 is testing equipment under load of the invention is program-controlled, sample connected mode schematic diagram；
Fig. 4 is load jump curve graph of the invention；
Fig. 5 is the connection schematic diagram of charging gun plug experiment.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing:
A kind of embodiment of charging equipment acceleration service life test method of the invention:
A kind of charging equipment acceleration service life test method, includes the following steps:
1, n is randomly selected1A AC/DC power module, n2Charging gun line, according to GB/T 18487.1-2015, GB/T
The requirement of 20234.3-2015 carries out routine test to sample, and confirmatory sample has normal usage function, and performance is intact.In order to save
About cost and the waste of resource is not caused, n1、n2Number by sample products sale use experience determine.
2, time projected life for determining charging equipment, since charging equipment is all assigned life time before factory,
Therefore time projected life can directly obtain according to the functional characteristic of charging equipment；Then the reliability of charging equipment is obtained,
The reliability of charging equipment can according to repeatedly to charging equipment carry out routine test obtain, under normal conditions reliability≤
0.99, reliability can be selected according to actual needs, and reliability is higher, and obtained life test results are more reliable.It is set by charging
Standby time projected life and reliability calculating charging equipment crash rate, crash rate indicate are as follows:
Wherein, λ is the crash rate of charging equipment, tpFor time projected life of charging equipment, ρ is the reliable of charging equipment
Degree.
3, according to the crash rate for the charging equipment being calculated, the crash rate test sampling for being 90% in conjunction with 1 confidence level of table
Table selects suitable charging equipment to allow failure number, to confirm overall test hourage T, further according to of the charging equipment of selection
Number, obtains single charging equipment sampling test time t, the specific content of table 1 is as follows:
The crash rate test sampling table (exponential distribution) that 1 confidence level of table is 90%
Illustrate how overall test hourage determines below with example, it is assumed that be calculated in step 2
Crash rate is 3 × 10-5If being 1 to need test to need to select the permission failure number of charging equipment, can directly be obtained from table 1
It is 0.13h to overall test hourage.In fact, the crash rate of the charging equipment obtained when calculating is not necessarily exactly table 1
In the crash rate that provides, but according to the immediate crash rate in the crash rate selection table 1 being calculated.
It tables look-up after obtaining the above parameter, test period t can be calculated, test period t is indicated are as follows:
Wherein, t is the routine test time of single charging equipment, and T is overall test hourage, n1For of charging equipment
Number.
4, selection influences the accelerated stress of charging equipment, and the present embodiment selects temperature as accelerated stress, and selects to accelerate
The rate temperature change and the rate temperature change under normal stress of test, wherein rate temperature change under accelerated test by
Testing equipment ability and desired assay time determine.Temperature Accelerating Factor in Life Test is calculated using Coffin-Masson formula, temperature accelerates
Factor representation are as follows:
Wherein, TEAFFor Temperature Accelerating Factor in Life Test, Δ TstressFor the rate temperature change under accelerated stress, Δ TnormalIt is positive
Rate temperature change under Chang Yingli.
5, in conjunction with the routine test time of single sample and Temperature Accelerating Factor in Life Test, the accelerated life test of single sample is calculated
Time, life test time indicate are as follows:
Wherein, T ' is the life test time of individual equipment, and t is the test period of single charging equipment, TEAFFor temperature
Spend accelerated factor.
6, connection type as shown in Figure 1, will be tested through integrity verification test and n1 power module of test passes simultaneously
It is put into sweat box after connection, sweat box connects input ac power and program-controlled load box.According to the curve graph of Fig. 2, sweat box is set
Program makes power module bear high temperature and low temperature environment, accelerates the damage progress of charging equipment, reduces the service life examination of charging equipment
The time is tested, voltage rating and electric current are applied to sample, cyclic test is carried out continuously and is completed to T ' test period, temperature change test is reached
Sample is subjected to routine test according to the requirement of GB/T 18487.1-2015, GB/T 20234.3-2015 afterwards, verifies its pressure stabilizing
Precision, precision of steady current think that charging equipment does not fail, charging equipment if the precision of voltage regulation is consistent with design requirement with precision of steady current
Has normal usage function, performance is intact；It is inconsistent, think that charging equipment fails, determines that charging equipment does not meet projected life
It is required that being substandard product, wherein the precision of voltage regulation, precision of steady current test method can refer to the progress of concerned countries standard.
7, after the completion of sample accelerated life test, if charging equipment does not fail, also the program-controlled ability of the load of sample is carried out
Detection, specific detection process are as follows: as shown in Figure 3 connection type will temperature loading test specimen it is in parallel after be put into sweat box,
And connect input ac power, program-controlled high-voltage switch and program-controlled load box.Load jump curve graph setting as shown in Figure 4 is program-controlled
Load box program starts to carry out the test of ON/OFF& load jump after sample temperature and environment temperature are consistent, recycles ON/
OFF input power, in ON state, load rises to 100% and is down to 0% (ON18s, OFF 6s) again.Test cycle total degree according to
Previous product use experience obtains, after the completion of the program-controlled load capacity test of sample, by sample according to GB/T 18487.1-
2015, GB/T 20234.3-2015 requirement carry out routine test, verify its precision of voltage regulation, precision of steady current, if the precision of voltage regulation with
Precision of steady current is consistent with design requirement, thinks that charging equipment does not fail, and charging equipment has normal usage function, and performance is intact；
It is inconsistent, think that charging equipment fails, determines that charging equipment does not meet projected life requirement, be substandard product, wherein steady
Pressure precision, precision of steady current test method can refer to the progress of concerned countries standard NB/T 33008.1, the essence of charger pressure stabilizing at this stage
≤ 0.5%, precision of steady current≤1% are spent, if later product technology upgrading, the precision of voltage regulation, precision of steady current require to be possible to higher.
8, also charging gun is detected, specific detection process are as follows: take n2A standard charging rifle, 2n2A standard is inserted
Seat.With n2For=4, the number that charging gun is arranged is respectively A1, A2, A3, A4, the number of charging socket be respectively B1,
B2……B7,B8.According to shown in Fig. 5, DC power supply, program-controlled load box, charging gun, socket are connected, wherein previous socket is with after
One charging gun joins end to end, rifle wire length 1m.Test connection schematic diagram is plugged according to charging gun shown in fig. 5, A1 charging gun is first
With B1 socket plug 100 times, A1 connect with B1 and is continually fed into charging gun rated current after the completion, until charging gun temperature rise is stablized
Afterwards, 100 plugs for carrying out A1 charging gun and B2 socket are tested, that is, complete a plug power cycles.Amount to cycle-index
Confirmed according to product actual conditions.
A2, A3, A4 charging gun are according to the test method of A1 charging gun respectively to B3, B4 socket, and B5, B6 socket, B7, B8 are inserted
Seat carries out plug test.The plug test of 4 charging guns can carry out simultaneously.Connect under the conditions of 40 DEG C of environment temperature after the test
DC power supply, charging gun, charging socket, load box are connect, charging gun rated current is continually fed into, until charging gun temperature rise is stablized.Make
With Hand-Held Thermal Imager calibrating terminal temperature, terminal temperature rise is no more than 80K and determines that charging gun does not fail.Wherein, at interval
Between no less than 10 minutes it is continuous 3 times reading temperature rise values be lower than 2K, it may be considered that having reached temperature stable state.
After plug test, if obvious ablation trace occurs in charging gun, charging gun part distortion, partial function can not be just
It is often used, is then judged as that charging gun different design closes and requires.
Specific embodiment is presented above, but the present invention is not limited to embodiment described above.The present invention
Basic ideas be above-mentioned basic scheme, for those of ordinary skill in the art, introduction according to the present invention is designed each
The model of kind deformation, formula, parameter do not need to spend creative work.The case where not departing from the principle and spirit of the invention
Under to embodiment carry out change, modification, replacement and modification still fall in protection scope of the present invention.
Claims (10)
1. a kind of charging equipment acceleration service life test method, which comprises the steps of:
1) the normal of single charging equipment is calculated according to the relationship of time projected life of charging equipment, reliability and permission failure number
Advise test period；
2) temperature for influencing the charging equipment service life is chosen as accelerated stress, the size of Temperature Accelerating Factor in Life Test is calculated, according to temperature
The routine test time of accelerated factor and single charging equipment calculates the life test time of single charging equipment；
3) cyclic test is carried out until reaching life test time to charging equipment according to the temperature variation curve of setting, sentenced
Whether disconnected charging equipment fails.
2. charging equipment acceleration service life test method according to claim 1, which is characterized in that accelerated life test terminates
Afterwards, if charging equipment does not fail, the load programmable function of charging equipment is detected, by being set to charging equipment
The ON/OFF load jump of cycle-index is tested, and in ON state, load rises to 100% and is down to 0% again, judges that charging equipment is
No failure.
3. charging equipment acceleration service life test method according to claim 2, which is characterized in that also filled to charging equipment
Electric rifle carries out plug test, by being continually fed into charging gun rated current to charging gun, carries out the plug test of setting number, sentences
Whether the charging gun of disconnected charging equipment fails.
4. charging equipment acceleration service life test method according to claim 3, which is characterized in that through previous socket with after
The end to end mode of one charging gun carries out plug test to multiple charging guns simultaneously.
5. charging equipment acceleration service life test method according to claim 1, which is characterized in that the Temperature Accelerating Factor in Life Test
It indicates are as follows:
Wherein, TEAFFor Temperature Accelerating Factor in Life Test, Δ TstressFor the rate temperature change under accelerated stress, Δ TnormalNormally to answer
Rate temperature change under power.
6. charging equipment acceleration service life test method according to claim 1, which is characterized in that the accelerated life test
Time is expressed as:
Wherein, T ' is the life test time of individual equipment, and t is the test period of single charging equipment, TEAFFor temperature plus
The fast factor.
7. a kind of charging equipment accelerated life test device, which is characterized in that including power supply, the program-controlled case of load and sweat box, institute
The load of power supply and the program-controlled case of load is stated for forming test loop with charging equipment, the sweat box is for being arranged at least one
Charging equipment to be measured, and temperature cycles variation, the acceleration are carried out according to temperature variation curve in life test time
The calculating process of test life time are as follows: according to time projected life of charging equipment, reliability and the relationship for allowing failure number
Calculate the routine test time of single charging equipment；The temperature for influencing the charging equipment service life is chosen as accelerated stress, calculates temperature
The size for spending accelerated factor calculates adding for single charging equipment according to the routine test time of accelerated factor and single charging equipment
Fast test life time.
8. charging equipment accelerated life test device according to claim 7, which is characterized in that accelerated life test terminates
Afterwards, also the load programmable function of charging equipment is detected, by the ON/ for carrying out setting cycle-index to charging equipment
The test of OFF load jump, in ON state, load rises to 100% and is down to 0% again, judges whether charging equipment fails.
9. charging equipment accelerated life test device according to claim 8, which is characterized in that also filled to charging equipment
Electric rifle carries out plug test, by being continually fed into charging gun rated current to charging gun, carries out the plug test of setting number, sentences
Whether the charging gun of disconnected charging equipment fails.
10. charging equipment accelerated life test device according to claim 9, which is characterized in that by previous socket with
The latter end to end mode of charging gun carries out plug test to multiple charging guns simultaneously.
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| CN201710525931.7A CN109212340B (en) | 2017-06-30 | 2017-06-30 | Accelerated life test method and device for charging equipment |
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|---|---|---|---|
| CN201710525931.7A CN109212340B (en) | 2017-06-30 | 2017-06-30 | Accelerated life test method and device for charging equipment |
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| CN109212340B CN109212340B (en) | 2022-02-18 |
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| CN110133407A (en) * | 2019-05-21 | 2019-08-16 | 出门问问信息科技有限公司 | The charging contact test method and test device of wearable device |
| CN111208364A (en) * | 2019-12-17 | 2020-05-29 | 中国人民解放军92942部队 | Comprehensive stress reliability accelerated test method based on multiple models |
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| CN109212340B (en) | 2022-02-18 |
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Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co.,Ltd. Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Patentee before: ZHENGZHOU YUTONG BUS Co.,Ltd. |