Double 85 Constant Temperature And Humidity Reliability Environmental Test (THB)
First, high temperature and humidity test
WHTOL (Wet High Temperature Operating Life) is a common environmental stress acceleration test, usually 85℃ and 85% relative humidity, which is generally carried out in accordance with the standard IEC 60068-2-67-2019. The test conditions are shown in the chart.
Second, the test principle
"Double 85 test" is one of the reliability environmental tests, mainly used for constant temperature and humidity box, that is, the temperature of the box is set to 85℃, the relative humidity is set to 85%RH conditions, to accelerate the aging of the test product. Although the test process is simple, the test is an important method to evaluate many characteristics of the test product, so it has become an indispensable reliability environmental test condition in various industries.
After aging the product under the condition of 85℃/85%RH, compare the performance changes of the product before and after aging, such as the photoelectric performance parameters of the lamp, the mechanical properties of the material, yellow index, etc., the smaller the difference, the better, so as to test the heat and moisture resistance of the product.
The product may have thermal failure when working in a continuous high temperature environment, and some moisture sensitive devices will fail in a high humidity environment. The dual 85 test can test the thermal stress generated by the product under high humidity and its ability to resist long-term moisture penetration. For example, the frequent failure of various products in the humid weather period in the south is mainly due to the poor temperature and humidity resistance of the products.
3. Experimental factors
In the LED lighting industry, many manufacturers have used the double 85 test results as an important means to judge the quality of lamps. Various possible reasons why LED lamps fail the dual 85 test are:
1. Lamp power supply: poor heat resistance of shell, danger of short circuit in circuit, failure of protection mechanism, etc.
2. Lamp structure: unreasonable design of heat dissipation body, installation problems, materials are not resistant to high temperature.
3. Lamp light source: poor moisture resistance, packaging adhesive aging, high temperature resistance.
If you encounter a special use environment, such as the working environment temperature is severe, you need to test its high and low temperature resistance, the test method can refer to the high and low temperature test project.
4. Serve customers
01. Customer group
LED lighting factory, LED power plant, LED packaging factory
02. Means of detection
Constant temperature and humidity test chamber
03. Reference standards
Constant temperature and humidity tests for electrical and electronic products -- Environmental testing -- Part 2: Test methods -- Test Cab: Constant temperature and humidity test GB/T 2423.3-2006.
04. Service content
4.1 Refer to the standard, conduct double 85 test on the product, and provide the third party's test results report.
4.2 Provide the analysis and improvement plan of the product through the double 85 test.
Reliability Test
AEC-Q102 Test Certification Fixed Damp Heat with Humidity Cycling (FMG), LED lamp reliability test method (GB/T 33721-2017), Component screening Ammonia test CAF test, Flame retardant grade Cyclic corrosion test (CCT), Mechanical shock test, High pressure cooker test (PCT), Highly Accelerated Stress Testing (HAST), High and low temperature and humidity test (THB), Hydrogen sulfide test (H2S), Liquid tank thermal shock test (TMSK), Component humidity sensitive grade test (MSL), Screening for high reliability use Hot flash test + acoustic sweep screening for high reliability use (MSL+SAT), LED luminaires reliability test scheme, Vibration test (VVF), Temperature cycle/thermal shock test (TC/TS), LED red Ink test UV aging test, LED light source anti-vulcanization test, Double 85 constant temperature and humidity reliability environmental test (THB), Salt spray test check.
Electric Vehicle Component Reliability Test Solution
In the trend of global warming and gradual consumption of resources, automotive gasoline is also sharply reduced, electric vehicles are driven by electric energy, reducing the heat of internal combustion engine, carbon dioxide and exhaust gas emissions, for energy saving and carbon reduction and improve the greenhouse effect plays a huge role, electric vehicles are the future trend of road transportation; In recent years, the world's advanced countries actively develop electric vehicles, for thousands of components composed of complex products, its reliability is particularly important, a variety of harsh environments are testing the electronic system of electric vehicles [battery cell, battery system, battery module, electric vehicle motor, electric vehicle controller, battery module and charger...], Hongzhan Technology for you to sort out electric vehicle related parts reliability test solutions, hope to be able to provide customers with reference.
First, different environmental conditions will have different effects on parts and cause them to fail, so the parts of the car need to be tested according to the relevant specifications to meet international requirements and meet the foreign market, the following is the correlation between different environmental conditions and product failure:
A. High temperature will make the product aging, gasification, cracking, softening, melting, expansion and evaporation, resulting in poor insulation, mechanical failure, mechanical stress increase; Low temperature will make the product embrittlement, icing, shrinkage and solidification, mechanical strength reduction, resulting in poor insulation, cracking mechanical failure, sealing failure;
B. High relative humidity will make the product poor insulation, cracking mechanical failure, sealing failure and resulting in poor insulation; Low relative humidity will dehydrate, embrittlement, reduce mechanical strength and lead to cracking and mechanical failure;
C. Low air pressure will cause product expansion, electrical insulation deterioration of the air to produce corona and ozone, low cooling effect and lead to mechanical failure, sealing failure, overheating;
D. Corrosive air will cause product corrosion, electrolysis, surface degradation, increased conductivity, increased contact resistance, resulting in increased wear electrical failure, mechanical failure;
E. Rapid temperature changes will cause local overheating of the product, resulting in cracking deformation and mechanical failure;
F. Accelerated vibration damage or impact will cause the mechanical stress fatigue resonance of the product and lead to an increase in structural damage.
Therefore, products need to pass the following climatic tests to test the reliability of components: Dust (dust) test, high temperature test, temperature and humidity storage test, salt/dry/warm recovery test, temperature and humidity cycle test, immersion/seepage test, salt spray test, low temperature test, thermal shock test, hot air aging test, weather and light resistance test, gas corrosion test, fire resistance test, mud and water test, dew condensation test, high variable temperature cycle test, Rain (waterproof) test, etc.
The following are the test conditions for automotive electronics:
A. IC and interior lights for locomotives,
Recommended model: vibration of the comprehensive chamber
B. Instrument panel, motor controller, Bluetooth headset, tire pressure sensor, GPS satellite positioning system, instrument backlight, interior light, exterior light, automotive lithium battery, pressure sensor, motor and controller, automotive DVR, cable, synthetic resin
Recommended model: constant temperature and humidity test chamber
C. 8.4 "LCD screen for cars
Recommended model: thermal stress recombination machine
Second, automotive electronic parts are divided into three categories, including IC, discrete semiconductor, passive components three categories, in order to ensure that these automotive electronic components meet the highest standards of automotive safety. The Automotive Electronics Council(AEC) is a set of standards AEC-Q100 designed for active parts (microcontrollers and integrated circuits...)and AEC-Q200 designed for passive components, which specifies the product quality and reliability that must be achieved for passive parts. AEC-Q100 is the vehicle reliability test standard formulated by the AEC organization, which is an important entry for 3C and IC manufacturers into the international auto factory module, and also an important technology to improve the reliability quality of Taiwan IC. In addition, the international auto factory has passed the safety standard (ISO-26262). AEC-Q100 is the basic requirement to pass this standard.
1. List of automotive electronic parts for A.EC-Q100: Automotive disposable memory, Power Supply step-down regulator, Automotive photocoupler, three-axis accelerometer sensor, video jiema device, rectifier, ambient light sensor, non-volatile ferroelectric memory, power management IC, embedded flash memory, DC/DC regulator, Vehicle gauge network communication device, LCD driver IC, Single power Supply differential Amplifier, Capacitive proximity switch Off, high brightness LED driver, Asynchronous switcher, 600V IC, GPS IC, ADAS Driver Assistance System Chip, GNSS Receiver, GNSS front-end amplifier...
B. Temperature and humidity test conditions: temperature cycle, power temperature cycle, high temperature storage life, high temperature working life, early life failure rate;
2. List of automotive electronic parts for A.AC-Q200: automotive grade electronic components (compliant with AEC-Q200), commercial electronic components, power transmission components, control components, comfort components, communication components, audio components.
B. Test conditions: high temperature storage, high temperature working life, temperature cycle, temperature shock, humidity resistance.
LED Traffic Light Test
Light-emitting Diode, referred to as LED, is the abbreviation of the English name Light Emitting Diode, through the combination of electrons and holes to release energy light, can efficiently convert electrical energy into light energy, has a wide range of uses in modern society, such as lighting, flat panel display and medical devices. With the continuous progress of technology, this electronic component from the early can only emit low-light red light to develop other monochromatic light, has been widely used in visible light, infrared and ultraviolet light, is widely used in indicators and display boards, and then extended to traffic lights. It is known as a new light source in the 21st century, with high efficiency, long life, material is not easily affected by the environment and relatively stable, with the advantages of traditional light sources can not be comparable.
The traffic on the zebra crossing is heavy every day, as the guide of the traffic rules - the traffic light is also working hard every day, because it is placed outdoors all year round, so it must accept the strict reliability test before it can work. The test conditions include: Voltage electric, failure protection, electromagnetic noise, dust and waterproof, high temperature test, vibration test, salt spray test, insulation voltage, insulation resistance test...
Note: Before other tests, LED traffic lights need to undergo dry heat tests before other tests can be carried out.
Lamp surface test: dry heat test: 60℃/24 hours/applied voltage
Failure judgment: no deformation, loosening, falling off
Temperature resistance test: 70℃(16 hours)→-15℃(16 hours)→R.T., RAMP:≦1℃/min, 2cycle, power supply
Temperature and humidity test: 40℃→RAMP:≦1℃/min→40℃/95%(24 hours), power on
Continuous switching action: 40℃/60~80%, ON(1sec)←→OFF(1sec), 10000 times
Voltage electric: 80 ~ 135V(AC), 170 ~ 270V(AC)
Failure judgment: Light intensity drift ≦20%(110V, 220V light intensity as the benchmark)
Waterproof and dustproof meet IP54 class requirements
Insulation resistance test:
Insulation resistance: 500V
Failure determination: not less than 2MΩ
Insulation withstand voltage test: 1000V/60Hz/1min(after insulation resistance test)
Light chamber test:
High temperature test: 130℃/1 hour
Failure judgment: no deformation, loosening, falling off, cracking... Etc.
Vibration test: XYZ three-way, each 12min for 36min, 10 ~ 35 ~ 10Hz sine wave, each cycle for 3min, total vibration of 2mm
Failure judgment: no deformation, loosening, falling off, cracking, and the LED light surface can be normally lit and operated
Wind tunnel test: Wind speed 16 (51.5-56.4m /s), forward (0 degrees) and side (45 degrees), each blowing for 2 hours
Failure judgment: no deformation, loosening, falling off, cracking
Salt spray test: 96 hours
Failure determination: less than 8 embroider points on the area of 10,000mm^2, LED signal light surface insulation resistance >2MΩ, voltage 1000V/1min, no abnormality
Recommended model 1: high temperature and high humidity test chamber
High temperature and high humidity test chamber is suitable for electrical, electronic, instruments and other products, parts and materials in high and low temperature alternating wet and hot environment storage, transportation, use adaptability test; It is a reliability test equipment for all kinds of electronic, electrical, electrical, plastic and other raw materials and devices to carry out cold resistance, heat resistance, wet resistance, dry resistance test and quality control engineering; Especially suitable for fiber, LCD, crystal, inductance, PCB, battery, computer, mobile phone and other products of high temperature resistance, low temperature resistance, moisture resistance cycle test.
Recommended model 2: vibration of the comprehensive chamber
Vibration of the comprehensive chamber combined with temperature, humidity, vibration function in one, suitable for aerospace products, information electronic instruments, materials, electrical, electronic products, all kinds of electronic components in a comprehensive harsh environment to test their performance indicators. Vibration of the comprehensive chamber mainly for aerospace, aviation, petroleum, chemical, electronics, communications and other scientific research and production units to provide temperature and humidity change environment, at the same time in the test chamber will be electric vibration stress according to the specified period of the test on the test, for the user of the whole machine (or components), electrical appliances, instruments, materials for temperature and humidity, vibration comprehensive stress screening test. In order to assess the adaptability of the test product or to evaluate the behavior of the test product. Compared with the effect of a single factor, it can more truly reflect the adaptability of electrical and electronic products to temperature, humidity and vibration complex environment changes in transportation and actual use, and expose product defects, which is an essential and important test means for the whole process of new product development, prototype test and product qualification test.
Recommended model 3: salt spray test chamber
The salt spray test chamber is suitable for all kinds of communication electronic products, electronic appliances, hardware parts to do neutral salt spray test (NSS) and corrosion test (AASS, CASS), omplied with CNS, ASTM, JIS, ISO and other standards. The salt spray test is to test the corrosion resistance of the products on the surface of various materials after anti-corrosion treatment such as coating, electroplating, anodic treatment and anti-rust oil.
Recommended model 4: waterproof and dustproof test chamber
Waterproof and dustproof test chamber is suitable for outdoor terminals such as metering automation terminals and distribution network automation terminals to carry out rain and dust tests to ensure that the tested products can withstand the impact of harsh environmental changes, so that the products can operate safely and reliably, and are suitable for external lighting and signal devices and automotive lamp shell protection. It can provide realistic simulation of various environments such as water, spray and dust tests that electronic products and their components may be subjected to during transportation and use. In order to detect the waterproof and dustproof performance of various products.
Inverter- Reliability Test
Inverter- reliability test also known as voltage converter, its function is to convert DC low voltage into AC high voltage, some electronic equipment must be driven by AC power, but we provide is DC power, at this time you must use the Inverter, direct current into alternating current to drive the electronic parts. Inverter- reliability test also known as voltage converter, its function is to convert DC low voltage into AC high voltage, some electronic equipment must be driven by AC power, but we provide is DC power, at this time you must use the Inverter, direct current into alternating current to drive the electronic parts.
Relevant test conditions:
Item
temperature
time
other
Initial test at normal temperature
25 ℃
TIME≥2 hours
-
Low temperature initial test
0 ℃ or -5 °C
TIME≥2 hours
-
High temperature initial test
60℃
TIME≥2 hours
-
High temperature and high humidity test
40℃/95%RH
240 hours
-
High temperature storage test
70℃
TIME≥96 hours or 240 hours
-
Low temperature storage test -1
-20°C
TIME≥96 hours
-
Low temperature storage test -2
-40℃
240 hours
-
High temperature and high humidity storage test
40℃/90%RH
TIME≥96 hours
-
Temperature cycle test
-20℃~ 70℃
5 cycle
Room temperature ↓-20 ℃(4 hours)↓ Room temperature (90%RH.4 hours)↓70°C(4 hours)↓ Room temperature (4 hours)
High temperature load test
55 ℃
equivalent load, 1,000 hours
-
Life test
40°C
MTBF≥40000 hours
-
on/off test (power cycle)
-
-
1min:on, 1min:off, 5,000 cycles using equivalent load
Vibration test
-
-
Acceleration 3q, frequency 10~55HZ, X, Y, Z three directions 10 minutes each, a total of 30 minutes
Impact test
-
-
Acceleration of 80g, 10 ms each time, Three times in X, Y, Z directions
Note 1: The tested module should be placed at normal (15~35° C,45~65%RH) for one hour before testing
Applicable equipment:
1. High and low temperature test chamber
2. High temperature and high humidity test chamber
3. Rapid temperature cycle test chamber
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