What is Environmental Testing?
The electronic devices and industrial products we rely on every day are affected by the environment in many ways, including temperature, humidity, pressure, light, electromagnetic waves and vibration. Environmental testing analyzes and evaluates the impact of these environmental factors on the product to determine its durability and reliability.
Guangdong Lab Companion LTD., has 10 million yuan registered capital and 3 R & D manufacturing plants in Dongguan, Kunshan and Chongqing. Lab Companion has been specialized in high and low temperature test equipment technology for 19 years, operating according to ISO9001, ISO14001, ISO 45001, ISO27001 four systems, setting sales and maintenance service centers in Shanghai, Wuhan, Chengdu, Chongqing, Xi 'an and Hong Kong. We work closely with International Organization of Leg al Metrology, Chinese Academy of Sciences, State Grid, China Southern Power Grid, Tsinghua University, Peking University, Hong Kong University of Science and Technology and other research institutions.
Main products of Lab Companion includes high and low temperature test chamber, constant temperature and humidity test chamber, rapid temperature cycling test chamber, thermal shock test chamber, high and low temperature and low pressure test chamber, vibration of the comprehensive chamber, industrial oven, vacuum oven, nitrogen oven, etc, providing high quality experimental equipment for universities, research institutes, medical health, inspection and quarantine, environmental monitoring, food and drugs, automobile manufacturing, petrochemical, rubber and plastic products, IC semiconductor, IT manufacturing and other fields.
ESS Environmental Stress Screening Test Chamber
The full horizontal air supply system from right to left with large air volume is adopted, so that all specimen cars and specimens on the test are charged and divided, and the heat exchange is completed evenly and quickly.
◆ The utilization rate of test space is as high as 90%
◆ The special design of "uniform horizontal air flow system" of ESS equipment is the patent of Ring measurement.
Patent number: 6272767
◆ Equipped with air volume regulation system
◆ Unique turbine circulator (air volume can reach 3000~ 8000CFM)
◆ Floor type structure, convenient loading and unloading of tested products
◆ According to the special structure of the tested product, the box suitable for installation is used
◆ The control system and refrigeration system can be separated from the box, which is easy to plan or do noise reduction in the laboratory
◆ Adopt cold balance temperature control, more energy saving
◆ Equipment adopts the world's top brand Sporlan refrigeration valve with high reliability and long life
◆ The refrigeration system of the equipment adopts thickened copper pipe
◆ All the strong electric parts are made of high temperature resistant wires, which has higher safety
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.
Thin Film Solar Cell
Thin film solar cell is a kind of solar cell manufactured by thin film technology, which has the advantages of low cost, thin thickness, light weight, flexibility and bendability. It is usually made of semiconductor materials such as copper indium gallium selenide (CIGS), cadmium telluride (CdTe), amorphous silicon, gallium arsenide (GaAs), etc. These materials have high photoelectric conversion efficiency and can generate electricity under low light conditions.
Thin film solar cells can be used in inexpensive glass, plastic, ceramics, graphite, metal sheet and other different materials as substrates to manufacture, forming a film thickness that can generate voltage only a few μm, so the amount of raw materials can be significantly reduced than silicon wafer solar cells under the same light receiving area (thickness can be lower than silicon wafer solar cells more than 90%). At present, the conversion efficiency of up to 13%, thin film solar cells are not only suitable for flat structure, because of its flexibility can also be made into non-plane structure, has a wide range of application prospects, can be combined with buildings or become a part of the building body.
Application of thin film solar cell product:
Translucent solar cell modules: Building Integrated Solar Energy Applications (BIPV)
Application of thin film solar energy: portable folding rechargeable power supply, military, travel
Applications of thin film solar modules: roofing, building integration, remote power supply, defense
Features of thin film solar cells:
1. Less power loss under the same shielding area (good power generation under weak light)
2. The loss of power under the same illumination is less than that of wafer solar cells
3. Better power temperature coefficient
4. Better light transmission
5. High cumulative power generation
6. Only a small amount of silicon is needed
7. There is no internal circuit short circuit problem (the connection has been built in the series battery manufacturing)
8. Thinner than wafer solar cells
9. Material supply is secure
10. Integrated use with building materials (BIPV)
Solar cell thickness comparison:
Crystalline silicon (200 ~ 350μm), amorphous film (0.5μm)
Types of thin film solar cells:
Amorphus Silicon (a-Si), Nanocrystalline Silicon (nc-Si), Microcrystalline Silicon, mc-Si), compound semiconductors II-IV [CdS, CdTe(cadmium telluride), CuInSe2], Dye Sensitized Solar cells, Organic/polymer solar cells, CIGS (Copper indium selenide)... Etc.
Thin-film solar module structure diagram:
Thin film solar module is composed of glass substrate, metal layer, transparent conductive layer, electrical function box, adhesive material, semiconductor layer... And so on.
Reliability test specification for thin film solar cells:
IEC61646(Thin-film solar photoelectric module test standard), CNS15115(thin-film silicon onshore solar photoelectric module design validation and type approval)
Temperature & humidity test chamber of Lab Companion
Temperature & humidity test chamber series, passed the CE certification, offer 34L, 64L, 100L, 180L, 340L, 600L, 1000L, 1500L and other volume models to meet the needs of different customers. In design, they use environment-friendly refrigerant and high-performance refrigeration system, parts and components are used in the international famous brand.
Multi-touch Panel Testing
When the human body is close to the touchpad, the capacitance value between the sensing pad and the ground will change (general pf level). Capacitive touch pad (also known as: Surface capacitive) is through the use of the sensor detected by the change of capacitance value by calculating microprocessor, filtering interference and finally determining whether there is a human body close to achieve the key function. Compared with the traditional mechanical keys, the advantage is that there is no mechanical damage, and non-metals such as glass, acrylic, plastic can be used as the operating panel isolation, making the appearance of the product more atmospheric. In contrast, it can also realize the sliding operation that is difficult to achieve with traditional mechanical keys, so that the human-machine interface is more in line with the intuitive operation of people.
The outermost layer of the capacitive touch panel is a thin silicon dioxide hardening processing layer, and its hardness reaches 7; The second layer is ITO(conductive coating), through the conductive layer on the front of the average distribution of low-voltage conduction current, to establish a uniform electric field on the glass surface, when the finger touches the surface of the touch panel, it will absorb a small amount of current from the contact point, resulting in a voltage drop of the corner electrode, the use of sensing the weak current of the human body to achieve the purpose of touch; The function of the bottom layer of ITO is to shield electromagnetic waves, so that the touch panel can work in a good environment without interference. While the projective capacitive, which is the touch mode used by the famous Apple iPhone and Windows 7, has the feature of supporting multi-touch, which can shorten the user's learning time, just use the finger belly touch panel to avoid the use of stylus, and has higher light transmission and more power saving, more scratch resistance than resistive type (hardness up to 7H or more), greatly increase the service life without correction...
Touch technology can be divided into four kinds according to the principle of sensing, including resistive, capacitive, surface acoustic wave and optics. And capacitive can also be divided into surface capacitive and projected capacitive two kinds.
Touch technology applications:
Industrial applications (automatic processing machines, measuring instruments, centralized monitoring and control)
Commercial applications (ticketing systems, POS, ATMs, vending machines, stored value machines)
Life applications (cell phones, satellite positioning GPS, UMPC, small laptop)
Education and entertainment (e-books, portable game consoles, jukeboxes, electronic dictionaries)
Comparison of touch panel light transmission rate: resistive (85%), capacitive (93%)
Multi-touch panel test conditions:
Operating temperature range: -20℃～70℃/20%～85%RH
Storage temperature range: -50℃～85℃/10%～90%RH
High temperature test: 70℃/240, 500 hours, 80℃/240, 1000 hours, 85℃/1000 hours, 100℃/240 hours
Low temperature test: -20℃/240 hours, -40℃/240, 500 hours, -40℃/1000 hours
High temperature and high humidity test: 60℃/90%RH/240hours, 60℃/95%RH/1000hours 70℃/80%RH/500hours, 70℃/90%RH/240,500,1000hours, 70℃/95%RH/500hours 85℃/85%RH/1000hours, 85℃/90%RH/1000hours
Boiling test: 100℃/100%RH/100 minutes
Temperature shock - high and low temperature: (Temperature shock test is not equivalent to temperature cycling test )
-30℃←→80℃, 500cycles
-40℃(30min)←→70(30min)℃, 10cycles
-40℃←→70℃, 50, 100cycles
-40℃(30min)←→110℃(30min), 100cycles
-40℃(30min)←→80℃(30min), 10, 100cycles
-40℃(30min)←→90℃(30min), 100cycles
Thermal Shock Test - Liquid Type: -40℃←→90℃, 2cycles
Cold and thermal shock test-over room temperature: -30℃(30min)→R.T. (5min)→80℃(30min), 20cycles
Service life: 1,000,000 times, 2,000,000 times, 35,000,000 times, 225,000,000 times, 300,000,000 times
Hardness test: greater than hardness level 7 (ASTM D 3363, JIS 5400)
Impact Test: With more than 5kg of force, strike the panel on the most vulnerable area and the center of the panel respectively.
Pin(Tail) Pulling Test: 5 or 10kg downward pulling.
Pin Folding Test：135¢angle, left and right back and forth for 10 times.
Impact resistance test: 11φ/5.5g copper ball dropped at 1.8m height on the center surface of 1m object, 3ψ/9g stainless steel ball dropped at 30cm height.
Writing durability: 100,000 characters or more (width R0.8mm, pressure 250g)
Touch durability: 1,000,000, 10,000,000, 160,000,000, 200,000,000 times or more (width R8 mm, hardness 60°, pressure 250g, 2 times per second)
Test equipment:
Test equipment
Test Requirements and Conditions
Temperature & humidity test chamber
Equipment features: high-strength, high-reliability structural design - to ensure the high reliability of the equipment; working room materials for the SUS304 stainless steel - corrosion resistance, strong anti-fatigue thermal function, long service life; high-density polyurethane foam insulation materials - to ensure that the heat loss is reduced to a little; the surface of the plastic spraying treatment - to ensure that the equipment's lasting corrosion-resistant function and the appearance of the life; high-strength temperature-resistant Silicone rubber sealing strip - to ensure the high sealing of the equipment door.
High temperature & high humidity test chamber
High temperature and high humidity test chamber series, passed the CE certification, offer 34L, 64L, 100L, 180L, 340L, 600L, 1000L, 1500L and other volume models to meet the needs of different customers. In design, they use environment-friendly refrigerant and high-performance refrigeration system, parts and components are used in the international famous brand.
Two-Zone(Basket Type)
Thermal shock test chamber
Applicable to the assessment of products (the whole machine), parts and components, etc. to withstand rapid changes in temperature. Thermal shock test chambers can understand the impact of the test sample once or repeatedly due to temperature changes. The main parameters affecting the temperature change test are the high and low temperature values of the temperature change range, the retention time of the sample at high and low temperature, and the number of test cycles.
Three-zone (Ventilation Type)
Thermal shock test chamber
TS series thermal shock test chambers have complete equipment specifications - two-zone(basket type), three-zone (ventilation type) and horizontal movement type are available for users to choose, fully meeting the various requirements of different users; The equipment can also provide standard high and low temperature test function to achieve the compatibility of temperature shock and high and low temperature test; high strength, high reliability of the structure design - ensure the high reliability of the equipment.
Industrial Computer Reliability Testing
Industrial computers can be divided into three categories according to their application attributes:
(1) Board class: includes Single Board Computer (SBC), Embedded board (Embedded Board), Black Plane, PC/104 module. (2) Subsystem class: includes single-board computers, boards, chassis, power supplies and other peripherals combined into operational subsystems, such as industrial servers and workstations. (3) System integration solutions: refers to a set of systems developed for a professional field, including the required software and hardware and surrounding, such as automatic teller machines (ATMs). The application of industrial computers widely covers ATM, POS, medical electronic equipment, game machines, gambling equipment, etc. The multi-field industry makes industrial computers must be able to withstand the use of sunlight, high and low temperature, wet and other environments, so the relevant reliability test is the focus of various manufacturers in the research and development test.
Common reliability tests for industrial computers:
(1) Wide temperature test
According to the actual application environment can be divided into four categories: 1. Outdoor: especially for the extreme low temperature or high temperature areas, such as northern Europe and desert countries, the temperature range can be from -50 to 70°C; 2. Enclosed space: for example, where heat sources are generated, such as next to a boiler, the high temperature range is about 70°C; 3. Mobile equipment: such as vehicle equipment, the high temperature can be up to 90°C according to the car area; 4. Special harsh environment: such as aerospace equipment, military, oil drilling equipment.
(2) Aging stress test
The temperature range is from -40°C to 85°C, and the temperature variation rate is 10 °C per minute for cyclic testing
(3) No wind high temperature test
At present, in order to prevent dust, industrial computers are planned to be closed and fanless in the mechanism design, so more and more manufacturers begin to pay attention to high temperature testing in a windless environment to ensure that high temperatures will not collapse
Note: For complete industrial computer test conditions, please consult LAB COMPANION
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