Information and resources are the basis of society. Energy is the progress of social and social development. With the rapid development of science and technology and economy, the demand for human energy is also increasing rapidly.
One is to save energy, the other is to develop new alternative energy, and solar energy is a new indispensable energy. In recent years, solar power generation technology in the world has been rapid development, the use of solar energy has become the consensus of the world, the quality of solar photovoltaic modules has become one of the most concerned issues. Thermal Cycle test is a basic but important test for solar panels, and the test equipment is thermal cycling chamber.
What are the basic performance indicators and detection methods of PV modules?
Basic performance indicators:
1. Product testing:
1) Thermal cycle test: The component temperature is 90℃ ~ -40℃ for 200 cycles.
2) Humidity-Freeze test: The component is tested for 10 cycles.
3) Hail impact: The ice ball is released from the ice ball transmitter to the middle of the formation glass front and the connection.
4) Insulation withstand voltage
5) Salt
6) Wind load
7) Twist
8) Long heat treatment
2. Environmental testing
1) Temperature changes
2) High temperature storage
3) Low temperature storage
4) Constant damp heat storage
5) Vibration, shock
6) Ground solar irradiation test
7) Bending test
What are the cycle conditions of the thermal cycle test and Why?
Thermal cycle refers to the working cycle in which heat is transferred from one part to another. According to the conservation of energy, heat can only be transferred and not lost, which is the premise of the thermal cycle. The principle of thermal cycling is the principle of heat exchange, using “special devices” such as evaporators (water-refrigerant heat exchangers) to recover heat and then recycle it.
The cold and hot cycle test chamber is to test the degree that the product can endure under the continuous environment of extremely high temperature and extremely low temperature in an instant. This is to detect chemical changes or physical damage caused by thermal expansion or contraction of the sample in the shortest time.
Positive cycle of heat: The cycle that converts heat energy into mechanical energy, also known as the heat engine cycle or power cycle. Such as steam power plant cycle, internal combustion engine and gas turbine plant cycle. Reverse cycle of heat: The cycle in which mechanical energy is consumed to transfer heat from a cold body to a hot body.
Cold and heat cycle resistance, also known as thermal shock resistance, is a necessary test for high temperature resistant coatings, which can test the temperature resistance effect of high temperature resistant paint film under different temperature differences.
In the welding process, the heat source moves along the weldment. Under the action of the welding heat source, the temperature of a certain point on the weldment changes with time, which is called the welding heat cycle of the point. Influencing factors: (1) welding process parameters and wire energy; (2) Preheating and interlayer temperature; Plate thickness, joint form and material thermal conductivity.
How to perform the thermal cycling test?
The first step in performing thermal cycling tests for photovoltaic panels is to select a suitable temperature range. This range should be based on the expected operating conditions for the panels, as well as any relevant industry standards or guidelines. The panels are typically subjected to temperature cycles ranging from -40 °C to 85 °C over a period of several hours or days, with a set number of cycles typically being used to establish the effectiveness of the testing process.
Once the temperature range has been established, the panels are placed in a thermal chamber or other testing environment. This environment is carefully controlled to ensure that the panels are exposed to the desired temperatures, and that the temperature changes are rapid and consistent. The panels are then monitored closely throughout the testing process, with any changes in performance or appearance being carefully documented.
After the thermal cycling testing is complete, the panels are carefully inspected and evaluated for any signs of damage or wear. This may involve visual inspections, electrical testing, and other methods to identify any defects or issues that may have occurred during the testing process.
Thermal cycling chamber
LIB PV-04:
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Temperature Range: -60℃ ～ +100 ℃
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Temperature Fluctuation: ± 0.5 ℃
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Temperature Deviation: ± 2.0 ℃
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Humidity Range: 20% ~ 98% RH
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Humidity Deviation: ± 2.5% RH
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Temperature Change Rate: 1 ~ 3.4℃ / Min
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Standard: IEC61215, IEC61646, IEC61108, IEC62688, UL1703, IEC61345
