Packaging method of photovoltaic module and photovoltaic module

A technology for photovoltaic modules and packaging methods, applied in photovoltaic power generation, electrical components, semiconductor devices, etc., can solve the problems of affecting the life of components, cooling for a long time, and high packaging costs, so as to extend the life of components, optimize the packaging process, and improve the photoelectricity. performance effect

Inactive Publication Date: 2013-03-27

赛维LDK太阳能高科技(南昌)有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0004] (1) The light transmittance of EVA material is relatively low, and it is difficult to absorb natural light near ultraviolet wavelengths

[0005] (2) The EVA material undergoes a chemical reaction after heating, and is cross-linked at one time, which can only be used at one time, which is not conducive to the rework process of laminated parts, and the packaging cost is relatively high

[0006] (3) For laminated parts made of EVA material, the framing temperature is below 50°C, and it needs to be cooled for a long time, resulting in low process efficiency

[0007] (4) After the aging test, the EVA material is easy to age and turn yellow, which affects the life of the component and reduces the electrical performance output

[0008] (5) EVA material has poor weather res...

Method used

[0039] (5) The main chain structure of the silica gel film is composed of alternating Si-O bonds, w...

Abstract

The invention discloses a packaging method of a photovoltaic module. The method is used for sealing a battery piece and includes the following steps: stacking, namely tempered glass, a first bonding piece, the battery piece, a second bonding piece and rear panel glass are sequentially stacked from the bottom to the top to form a stacked piece, and the first bonding piece and the second bonding piece are both solid silica membranes; laminating, namely arranging the stacked piece in a laminating machine, vacuumizing and heating, bonding the tempered glass, the first bonding piece, the battery piece, the second bonding piece and the rear panel glass to form a laminated piece, cooling, and taking the laminated piece out; and framing the laminated piece to obtain the photovoltaic module. By means of an embodiment of the packaging method, the photoelectric property, weather fastness and reliability of the photovoltaic module can be improved, the service life of the module is prolonged, the module cost is reduced, and packaging process is optimized. In addition, the invention further discloses the photovoltaic module packaged through the packaging method.

Application Domain

Final product manufacturePhotovoltaic energy generation +1

Technology Topic

BackplaneEngineering +3

Examples

Experimental program(1)

Example Embodiment

[0025] The following describes the technical solutions in the embodiments of the present invention clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0026] The embodiment of the present invention provides a method for packaging a photovoltaic module for sealing a solar cell, including the following steps:

[0027] Laminating, in the order from bottom to top, the tempered glass, the first bonding member, the battery sheet, the second bonding member, and the TPT back glass are laminated to form a laminate. The first bonding member and the second bonding member are both solid silica gel films. In other embodiments, the TPT backplane can be replaced by one of TPE glass, PET glass or tempered glass.

[0028] Preferably, the second bonding member is colorless, transparent or white, the thickness of the first bonding member is 0.2 to 0.6 mm, and the thickness of the second bonding member is 0.2 to 0.6 mm. The thickness of the first bonding member and the thickness of the second bonding member may be equal or unequal.

[0029] Preferably, the thickness of the tempered glass is 2 to 4 mm, the thickness of the battery sheet is 0.15 to 0.25 mm, and the thickness of the back plate glass is 0.2 to 0.6 mm or 2 to 4 mm.

[0030] Laminating, placing the laminate in a laminator, vacuuming and heating, bonding the tempered glass, the first bonding member, the battery sheet, the second bonding member, and the TPT backplane glass to form a laminate, After cooling, the laminate was taken out.

[0031] Preferably, the lamination temperature is 148~165°C, the pressure is -70~-10Kpa, and the lamination time is 600~1500s. Laminating temperature, pressure and time are all determined by the properties of silica gel. During lamination, the solid silicone film melts and stretches out and solidifies due to pressure, forming burrs, which should be cut off after lamination.

[0032] Mount the laminate on an aluminum frame to obtain a photovoltaic module. The framing is used to increase the strength of the components, further seal the battery components, and extend the service life of the battery.

[0033] The embodiment of the present invention also provides a photovoltaic module, which is packaged by the above-mentioned encapsulation method, and includes tempered glass, a first bonding member, a solar cell, a second bonding member, and a back glass. Both the bonding member and the second bonding member are solid silica gel films.

[0034] The beneficial effects of the embodiments of the present invention are:

[0035] (1) The light transmittance of EVA is greater than or equal to 91%, while the transmittance of silicone film is greater than or equal to 93%. The transmittance of silicone film is better than that of EVA film, especially for natural light near ultraviolet wavelengths. Therefore, the photovoltaic module packaging method according to the embodiment of the present invention improves the light conversion efficiency and photoelectric performance of the photovoltaic module.

[0036] (2) EVA undergoes a chemical reaction after heating and can only be used once. After the silica gel is heated, no chemical reaction occurs, and it can be layered repeatedly. When the laminate has defects such as tin dross, cracks, debris, cell displacement, etc., the defective parts can be removed, or replaced with good ones, placed in the laminating machine, reworked and re-laminated and packaged without replacing the silicone film . Therefore, the silicone film is better than the one-time cross-linking of EVA, which improves the reversible operation of the module, simplifies the rework process of defective products, and optimizes the packaging process. On the other hand, it saves raw materials and reduces packaging costs.

[0037] (3) EVA encapsulated laminates have a framing temperature below 50°C, while the molecular structure of the silicone film material is more uniform, and the heat dissipation is more uniform. The laminate can be framed at 60°C without cracking . Therefore, adopting the photovoltaic module packaging method of the embodiment of the present invention shortens the cooling time of the laminate, improves the photovoltaic module manufacturing process efficiency, and optimizes the packaging process.

[0038] (4) After the aging test, the aging and yellowing degree of photovoltaic modules encapsulated with solid silicone film is less than that of EVA film, and the module power is increased by more than 1.5%. The appearance and photoelectric performance are far better than photovoltaic modules encapsulated with EVA, and the photovoltaic modules are extended. The longevity, reducing the cost of components.

[0039] (5) The main chain structure of the silica gel film is composed of alternating Si-O bonds, which has excellent UV resistance, thermal stability and transparency, without the need to add UV stabilizers.

[0040] (6) The silica gel film material has strong weather resistance, the current output of the wire is basically the same, and the power output performance is stable.

[0041] (7) The silicone membrane material is not easy to fall off between layers, and the reliability is improved.

[0042] The above-mentioned embodiments do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-mentioned embodiments shall be included in the protection scope of the technical solution.

PUM

Property	Measurement	Unit
Thickness	0.2 ~ 0.6	mm
Thickness	2.0 ~ 4.0	mm
Thickness	0.15 ~ 0.25	mm

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Optimizing the packaging process
Improve photoelectric performance

Method and device for reducing positional deviation between chip embedding and photolithographic pattern

ActiveCN110517961BThe process steps are simpleOptimizing the packaging process

Owner:SHANGHAI JIAO TONG UNIV