Photovoltaic/LED Walk in High and Low Temperature Aging Laboratory

Photovoltaic/LED Walk in High and Low Temperature Aging LaboratoryIntroduction

As core components in the fields of new energy and semiconductor lighting, photovoltaic and LED products need to cope with complex environments such as outdoor day night temperature differences, high temperature and humidity, low temperature and severe cold for a long time. The walk-in high and low temperature aging laboratory is a key specialized equipment for simulating environmental stress throughout its life cycle and conducting reliability testing. The following provides a targeted introduction from five aspects: core positioning, system composition, key technical parameters, industry-specific applications, and core advantages.

1、 Core positioning

Specially designed for the research and development of photovoltaic modules, photovoltaic inverters, LED lighting fixtures, LED modules, LED power supplies, and other products. By simulating a wide temperature range of -40 ℃~+85 ℃ and high humidity (up to 98% RH) in a cyclic environment, combined with long-term aging testing, the performance stability, structural reliability, and service life of the products under terminal temperature, temperature and humidity cycling, and thermal shock are verified. The core solution is to address the environmental reliability verification pain points of photovoltaic/LED products from research and development to mass production. It is the core testing method for quality control and performance optimization before product delivery.

2、 System composition

1. Main body of the laboratory

Box structure: polyurethane foam insulation board (thickness 100-150mm) is used, and the inner and outer walls are mostly made of 304 stainless steel, which has good insulation, anti-corrosion and sealing properties; The large photovoltaic module/LED whole lamp testing area is reserved with spacious space, which can be adapted to batch testing of whole boxes and cabinets of products.

Temperature regulation system: composed of refrigeration unit (two-stage compression/cascade refrigeration), heating system, evaporator, and condenser, to achieve rapid temperature rise and fall and constant temperature stability; In response to the heating characteristics of LED, some models are equipped with independent heat dissipation ducts to avoid the accumulation of heat inside the box affecting testing accuracy.

Humidity control system: steam humidification/spray humidification is adopted for humidification. Dehumidification is achieved through the dual mode of refrigeration dehumidification+adsorption dehumidification, and the humidity range is precisely controlled to meet the requirements of LED power supply and photovoltaic inverter for damp heat aging.

2. Control system and acquisition system

Main control system: 7-inch/10 inch color touch screen, supports PLC control, can preset multiple programs (heating, cooling, constant temperature, cycling), set temperature range -40 ℃~+85 ℃, humidity range 20% RH~98% RH; Equipped with photovoltaic/LED exclusive testing curves (such as outdoor temperature and humidity cycling curves), one click call.

Data acquisition system: Built in high-precision temperature/humidity sensors (accuracy ± 0.5 ℃, ± 2% RH) can be linked to collect key parameters such as product surface temperature, output power, light attenuation (LED), insulation resistance (photovoltaic), etc. It supports USB/Ethernet data export and is suitable for laboratory data traceability and analysis.

3. Auxiliary system

Load system: For photovoltaic inverters and LED power supplies, customized electronic loads can be provided to simulate actual working conditions and achieve dual simulation testing of "environmental stress+load conditions".

Safety protection system: equipped with over temperature protection, over pressure protection, leakage protection, compressor overload protection, and door interlock protection to ensure test safety; For photovoltaic module testing, additional protection against electric shock and arc is provided.

Ventilation/circulation system: High efficiency axial flow fan and air duct design are adopted to ensure temperature uniformity within the box of ≤± 2 ℃ (critical areas of ≤± 1 ℃), avoiding testing errors caused by local temperature differences of photovoltaic modules/LED lamps.

3、 Key technical parameters (industry standard configuration)

parameter itemConventional configuration of photovoltaic/LED laboratory

temperature range-40 ℃~+85 ℃ (customizable -70 ℃~+100 ℃)

humidity range20% RH~98% RH (optional with no humidity function)

Temperature Uniformity≤± 2 ℃ (unloaded)

temperature fluctuation≤±0.5℃

Heating and cooling rate1-10 ℃/min (customizable for rapid temperature rise and fall, ≥ 20 ℃/min)

internal volume1m ³~100m ³ (customized as needed, suitable for single component/whole lamp/batch products)

load capacityZui up to 500kg (large photovoltaic module test bench can be customized for higher loads)

power interfaceCompatible with AC220V/AC380V, supporting power supply for multiple sets of products

4、 Industry specific application scenarios

1. Special testing for photovoltaic products

Photovoltaic modules: simulate outdoor day night temperature difference cycles, high temperature and high humidity aging, test the risk of delamination and cracking of module packaging materials, thermal spot effect of battery cells, sealing and insulation reliability of frames and junction boxes; Verify the mechanical properties of the component at -40 ℃ low temperature and the power attenuation rate at+85 ℃ high temperature.

Photovoltaic inverter/photovoltaic controller: Simulate long-term operation in high temperature and high humidity environments, test the inverter's heat dissipation performance, capacitor life, control module stability, and verify the startup success rate and output accuracy during high and low temperature switching.

Photovoltaic bracket/accessories: Test the thermal expansion and contraction deformation, corrosion and aging resistance of metal brackets and sealing strips at the junction temperature.

2. Special testing for LED products

LED lighting fixtures (outdoor/indoor): Simulate high temperature, high humidity, and low temperature cycles corresponding to outdoor sun and rain exposure, test LED light source attenuation and color drift, drive power supply life, and evaluate the aging resistance and anti glare performance of the lamp housing and lens; Verify the flicker and insulation safety of indoor lighting fixtures under high temperature and humidity conditions.

LED module/LED strip: Test the risk of solder joint detachment and circuit oxidation of the module under high and low temperature cycling, as well as the sealing performance (waterproof type) and brightness consistency of the strip.

LED power supply/driver controller: Focus on conducting wet heat aging tests to verify the insulation performance of the power supply in high humidity environments, the risk of component aging and failure, and to test the output stability and protection mechanism response speed during high and low temperature switching.

5、 Core advantages

Customized adaptation: Supports customization of volume, temperature range, and heating/cooling rate based on the size, batch size, and testing standards (such as IEC 61215, IEC 60068, GB/T 2423) of photovoltaic/LED products. It can be paired with modules such as salt spray and UV aging to achieve comprehensive testing in multiple environments.

High precision reproduction: Accurately simulating the stress of real outdoor environments, with traceable test results, effectively identifying early failure defects of products (such as LED light decay, photovoltaic module power decay, power short circuit).

Efficient batch testing: The walk-in large volume design can simultaneously accommodate multiple photovoltaic modules and multiple LED lamps/inverters for testing, greatly improving research and production testing efficiency and reducing single product testing costs.

Energy saving intelligent operation and maintenance: adopting variable frequency compressors and energy-saving insulation structures to reduce operating energy consumption; Touch screen remote control, automatic data storage, support remote monitoring (optional), reduce manual operation and maintenance costs.

Compliance assurance: Mainstream testing standards in the photovoltaic and LED industries (IEC, GB, UL) provide compliant testing data support for product certification, mass production, and factory delivery.

Photovoltaic/LED Walk in High and Low Temperature Aging LaboratoryIntroduction