PU composite materialframes are more suitable for photovoltaic modules
PU-compo non-metallic frames
With the continuous development of the photovoltaic industry, the system voltage is relatively With the improvement, higher requirements have been put forward for the insulation of packaging materials; in order to make full use of land resources, photovoltaic power stations are built in harsh environments such as coastal beaches, offshore islands, deserts, Gobi, lakes, ponds, reservoirs, and chemical plant roofs. will become a trend. At present, aluminum alloy frames are commonly used in photovoltaic modules. In the face of new application trends such as increased system voltage and harsh power station environment, aluminum alloy frame photovoltaic modules have exposed the following problems:
l Poor insulation; poor corrosion resistance; extremely harsh environments and cannot meet the application;
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l Poor sealing performance;
The thermal expansion coefficient is very different from that of the front glass of the module (quite (30 to 50 times larger than glass), causing the sealant between the frame and the glass to be easily damaged when the module is in operation for a long time.
l It has poor impact resistance and fatigue resistance, and is prone to plastic deformation;
l It consumes precious non-ferrous metal resources and is not conducive to the sustainable development of human society.
PU-compo non-metallic frame provides a perfect solution to solve the above problems. It can overcome the above shortcomings of aluminum alloy frame and ensure that the power station works safer and more stably in harsh environments.
Photovoltaic modules composed of PU-compo non-metallic frames have the advantages of excellent insulation performance, obvious anti-PID effect, corrosion resistance, good sealing performance, lightweight and high strength.
· Excellent insulation performance, obvious resistance to PID effect
PU-compo non-metallic The resistivity of the frame can reach 1.5×1014W·cm, which is similar to EVA. This saves a large number of grounding wires and devices in the power station, simplifies the installation steps, improves installation efficiency, and saves costs. Frame insulation, PU-compo non-metallic frame photovoltaic modules have excellent anti-PID performance, which can avoid losses caused by leakage and induction lightning, ensure that the system has high power generation capacity and total output power, and ensure the safety of photovoltaic power stations.
· Corrosion resistance
Especially in East my country, acid rain pollution is serious. Aluminum alloys are exposed to acid rain for a long time, and their strength is reduced. They will be vulnerable when encountering strong winds and heavy snow. Shorten the overall service life of the power station. PU-compo non-metallic frame photovoltaic modules have strong resistance to salt spray, sea breeze, sea water, and various acid and alkali solutions, which can save the power station additional anti-corrosion treatment and reduce later maintenance costs.
· Good sealing performance
The main component of PU-compo non-metallic frame is glass fiber, which is consistent with the chemical composition of the glass on the front of the module and has almost the same thermal expansion coefficient. The thermal expansion coefficient of the aluminum alloy frame is very different from that of the front glass of the module, which is equivalent to 30 to 50 times that of glass. In environments with large temperature differences, such as deserts and Gobis, due to changes in temperature and inconsistent thermal expansion coefficients, the sealant between the frame and the glass is easily damaged when the module is used for a long time. PU-compo non-metal frame photovoltaic modules do not have this problem, and the sealing performance between the frame and the glass is excellent.
Lightweight and high strength
The tensile strength of PU-compo frame is about 1200Mpa, which is more than 5 times that of aluminum alloy, and the density is 1/3 smaller than aluminum alloy, so PU-compo compo non-metal frame photovoltaic modules can fully withstand wind pressure and snow pressure loads and meet the requirements of IEC61215.
PU-compo non-metallic frame photovoltaic module anti-PID test
Test conditions:
Temperature: 90℃ Humidity: 85% Time: 120h Voltage: -1000V
Comparison sample: 1 piece is PU-compo non-metal frame component, the other 1 piece is aluminum alloy Frame component;
Appearance test:
PU-compo non-metallic frame PU-compo non-metallic frame
The battery in the PU-compo non-metallic frame component has no obvious change and no attenuation phenomenon ;
The batteries around the aluminum alloy frame components have shown discoloration and serious attenuation.
Anti-PID test results:
Conclusion:
From the above test results, under the same test conditions, the power attenuation of the aluminum alloy frame component is 33.05 %, while the power attenuation of PU-compo non-metal frame components is only 2.01%. The application of PU-compo non-metallic frame helps the component significantly reduce the PID effect.
