Road LED Text Reliability Test
Environmental resistance test:
Vibration test, transportation package drop test, temperature cycle test, temperature and humidity test, impact test, waterproof test
Durability test:
High and low temperature preservation test, continuous switch operation test, continuous action test
LED display reliability test conditions finishing:
Vibration test: three-axis (XYZ) vibration, 10 minutes each, 10 ~ 35 ~ 10Hz sine wave, 300 ~ 1200 times/min, 3 minutes per cycle, vibration Fu 2mm
Vibration tightening test: vibration + temperature (-10 ~ 60℃)+ voltage + load
Drop test for transport packaging: Drop material slurry (at least 12mm thick), height depends on the purpose of use
Temperature cycle:
a. No boot test: 60℃/6 hours ← Rising and cooling for 30 minutes →-10℃/6 hours, 2cycle
b. Boot test: 60℃/4 hours ← Rising and cooling 30 minutes →0℃/6 hours, 2cycle, power supply without packaging and load
Temperature and humidity test:
No power test: 60℃/95%R.H./48 hours
Boot test: 60℃/95%R.H./24 hours/no packaging power supply load
Impact test: impact distance 3m, slope 15 degrees, six sides
Waterproof test: height 30 cm, 10 liters /min spray Angle 60 degrees, spraying position: front and back up, spraying range 1 square meter, spraying time 1 minute
Humidity test: 40℃/90%R.H./8 hours ←→25℃/65%R.H./16 hours, 10cycle)
High and low temperature preservation test: 60℃/95%R.H./72 hours →10℃/72 hours
Continuous switch action test:
Complete the switch within one second, shut down for at least three seconds, 2000 times, 45℃/80%R.H.
Continuous action test: 40℃/85%R.H./72 hours/power on
IEC 61646 Test Standard for Thin-film Solar Photoelectric Modules
Through the diagnostic measurement, electrical measurement, irradiation test, environmental test, mechanical test five types of test and inspection mode, confirm the design confirmation and form approval requirements of thin film solar energy, and confirm that the module can operate in the general climate environment required by the specification for a long time.
IEC 61646-10.1 Visual inspection procedure
Objective: To check for any visual defects in the module.
Performance at STC under IEC 61646-10.2 Standard test conditions
Objective: Using natural light or A class simulator, under standard test conditions (battery temperature: 25±2℃, irradiance: 1000wm^-2, standard solar spectrum irradiation distribution in accordance with IEC891), test the electrical performance of the module with load change.
IEC 61646-10.3 Insulation test
Objective: To test whether there is good insulation between the current carrying parts and the frame of the module
IEC 61646-10.4 Measurement of temperature coefficients
Objective: To test the current temperature coefficient and voltage temperature coefficient in the module test. The temperature coefficient measured is valid only for the irradiation used in the test. For linear modules, it is valid within ±30% of this irradiation. This procedure is in addition to IEC891, which specifies the measurement of these coefficients from individual cells in a representative batch. The temperature coefficient of the thin-film solar cell module depends on the heat treatment process of the module involved. When the temperature coefficient is involved, the conditions of the thermal test and the irradiation results of the process should be indicated.
IEC 61646-10.5 Measurement of nominal operating cell temperature (NOCT)
Objective: To test the NOCT of the module
IEC 61646-10.6 Performance at NOCT
Objective: When the nominal operating battery temperature and irradiance are 800Wm^-2, under the standard solar spectrum irradiance distribution condition, the electrical performance of the module varies with the load.
IEC 61646-10.7 Performance at low irradiance
Objective: To determine the electrical performance of modules under load under natural light or A class A simulator at 25℃ and 200Wm^-2(measured with appropriate reference cell).
IEC 61646-10.8 Outdoor exposure Testing
Objective: To make an unknown assessment of the resistance of the module to exposure to outdoor conditions and to show any effects of degradation that could not be detected by the experiment or test.
IEC 61646-10.9 Hot spot test
Objective: To determine the ability of the module to withstand thermal effects, such as packaging material aging, battery cracking, internal connection failure, local shading or stained edges can cause such defects.
IEC 61646-10.10 UV test (UV test)
Objective: To confirm the ability of the module to withstand ultraviolet (UV) radiation, the new UV test is described in IEC1345, and if necessary, the module should be exposed to light before performing this test.
IEC61646-10.11 Thermal cycling Test (Thermal cycling)
Objective: To confirm the ability of the module to resist thermal inhomogeneity, fatigue and other stresses due to repeated temperature changes. The module should be annealed before receiving this test. [Pre-I-V test] refers to the test after annealing, be careful not to expose the module to light before the final I-V test.
Test requirements:
a. Instruments to monitor the electrical continuity within each module throughout the test process
b. Monitor the insulation integrity between one of the recessed ends of each module and the frame or support frame
c. Record module temperature throughout the test and monitor any open circuit or ground failure that may occur (no intermittent open circuit or ground failure during the test).
d.The insulation resistance shall meet the same requirements as the initial measurement
IEC 61646-10.12 Humidity freeze cycle test
Purpose: To test the module's resistance to the influence of the subsequent sub-zero temperature under high temperature and humidity, this is not a thermal shock test, before receiving the test, the module should be annealed and subjected to a thermal cycle test, [[Pre-I-V test] refers to the thermal cycle after the test, be careful not to expose the module to light before the final I-V test.
Test requirements:
a. Instruments to monitor the electrical continuity within each module throughout the test process
b. Monitor the insulation integrity between one of the recessed ends of each module and the frame or support frame
c. Record module temperature throughout the test and monitor any open circuit or ground failure that may occur (no intermittent open circuit or ground failure during the test).
d. The insulation resistance shall meet the same requirements as the initial measurement
IEC 61646-10.13 Damp heat Test (Damp heat)
Objective: To test the ability of the module to resist long-term infiltration of moisture
Test requirements: The insulation resistance shall meet the same requirements as the initial measurement
IEC 61646-10.14 Robustness of terminations
Objective: To determine whether the attachment between the lead end and the lead end to the module body can withstand the force during normal installation and operation.
IEC 61646-10.15 Twist Test
Objective: To detect possible problems caused by module installation on an imperfect structure
IEC 61646-10.16 Mechanical load test
Purpose: The purpose of this test is to determine the ability of the module to withstand wind, snow, ice, or static loads
IEC 61646-10.17 Hail test
Objective: To verify the impact resistance of the module to hail
IEC 61646-10.18 Light soaking Test
Objective: To stabilize the electrical properties of thin film modules by simulating solar irradiation
IEC 61646-10.19 Annealing Tests (Annealing)
Objective: The film module is annealed before the verification test. If not annealed, the heating during the subsequent test procedure may mask the attenuation caused by other causes.
IEC 61646-10.20 Wet leakage current Test
Purpose: To evaluate the insulation of the module under wet operating conditions and to verify that moisture from rain, fog, dew or melting snow does not enter the live parts of the module circuit, which may cause corrosion, ground failure or safety hazards.
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