Homogeneous glass double-glass photovoltaic module laser melting packaging structure

Abstract

The utility model relates to the technical field of photovoltaic assembly packaging, in particular to a homogeneous glass double-glass photovoltaic assembly laser melting packaging structure. A groove is formed in the middle of the front panel glass; a battery array and a packaging material are arranged in the groove; a laser melting area is arranged at the edge part between the groove and the front panel glass, and the laser melting area is kept transparent; after the front panel glass and the rear cover plate glass are subjected to laser welding, a continuous closed melting mark surrounding and closing the groove is formed in the laser melting area; the depth of the groove is equal to the thickness of the battery array and the thickness of the packaging material during lamination, so that external water vapor is thoroughly prevented from entering and contacting a channel for packaging the battery, and the situation that harmful substances in the packaging material react with the water vapor and are decomposed to cause battery corrosion due to contact with the battery is prevented; the service life of the photovoltaic module is prolonged, a blank space for reserving a creepage distance is canceled, the material cost is further reduced, and the application range of the photovoltaic module is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component packaging, in particular to a laser melting packaging structure of a double-glass photovoltaic component of homogeneous glass. Background Art

[0002] In the field of photovoltaic module manufacturing, packaging technology has always been a key factor affecting module performance and lifespan. Conventional photovoltaic module packaging methods mainly include glass-to-glass packaging and glass-to-backsheet packaging. While these two packaging methods can protect photovoltaic cells from environmental corrosion to a certain extent, they still pose the problem of water vapor penetration. Specifically, in glass-to-glass packaging, because the gap between the two glass panes is difficult to completely seal, water vapor easily penetrates through the gap and then chemically reacts with the surface of the encapsulated photovoltaic cell and the decomposition products of the solder ribbon and packaging material. These chemical reactions not only cause corrosion and contamination of the cell surface, but also may affect the cell's electrical performance, such as reduced insulation resistance and increased leakage current, seriously affecting the efficiency and lifespan of the photovoltaic module. In glass-to-backsheet packaging, although the backsheet can block water vapor penetration to a certain extent, long-term use and environmental corrosion can still cause the backsheet to age and crack, allowing water vapor to penetrate through the backsheet. Similarly, this infiltrated water vapor chemically reacts with the photovoltaic cell surface and the packaging material, resulting in a decrease in cell efficiency and a shortened module lifespan. Especially for battery types that are very sensitive to moisture, such as heterojunction batteries, the transparent conductive oxide layer on their surface is easily invalidated under the action of moisture, resulting in a sharp decline in battery performance. At the same time, whether it is the packaging of glass and glass or the packaging of glass and backplane, blank space required for creepage distance needs to be reserved. The material cost is too high and the application scope of photovoltaic modules will also be reduced. Utility Model Content

[0003] The purpose of this utility model is to provide a laser melting packaging structure of a double-glass photovoltaic module with homogeneous glass to address the defects in the prior art, so as to completely block the channel for external water vapor to enter and contact the packaged battery, prevent the packaging material from reacting with water vapor to decompose harmful substances, and contact with the battery to cause battery corrosion, thereby extending the service life of the photovoltaic module, eliminating the blank space reserved for creepage distance, further reducing material costs, and expanding the application range of photovoltaic modules.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a homogeneous glass double-glass photovoltaic laser melting packaging structure, including a front panel glass and a rear cover glass, a groove is provided in the middle of the front panel glass; a battery array and packaging material are arranged in the groove; a laser melting area is provided at the edge portion between the groove and the front panel glass, and the laser melting area remains transparent; after the front panel glass and the rear cover glass are laser welded, a continuous closed melting mark surrounding and closing the groove is formed in the laser melting area; the depth of the groove is equal to the thickness of the battery array plus the thickness of the packaging material during lamination.

[0005] Furthermore, a slope is provided between the groove and the laser melting area, and the slope slopes downward from the outside to the inside.

[0006] Furthermore, the light-facing glass in the groove of the front panel glass is embossed.

[0007] Furthermore, the groove is a rectangular structure as a whole.

[0008] Furthermore, the rear cover glass is provided with an opening to connect the battery array output to an external junction box. The front panel glass and the rear cover glass are welded and the battery array therein is sealed to form a laminate mounting frame and the junction box to form a photovoltaic module.

[0009] The invention comprises a front panel glass and a rear cover glass, wherein a groove is provided in the middle of the front panel glass; a battery array and packaging material are provided in the groove; a laser melting area is provided at the edge portion between the groove and the front panel glass, and the laser melting area remains transparent; after the front panel glass and the rear cover glass are laser welded, a continuous closed melting mark surrounding and closing the groove is formed in the laser melting area; the depth of the groove and the thickness of the battery array plus the thickness of the packaging material during lamination are equal, thereby achieving the effect of completely blocking the channel for external water vapor to enter and contact the packaged battery, preventing the packaging material from reacting with water vapor to decompose harmful substances, contacting the battery and causing battery corrosion, thereby extending the service life of the photovoltaic module, eliminating the blank space reserved for the creepage distance, further reducing material costs, and expanding the application range of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 Schematic diagram of the front panel glass of a homogeneous glass double-glass photovoltaic laser melting packaging structure;

[0012] Figure 2 A top view of the front panel glass of a homogeneous glass double-glass photovoltaic laser melting packaging structure;

[0013] Figure 3 A schematic diagram of the positions of the front and rear cover glasses before melting in a homogeneous glass double-glass photovoltaic laser melting packaging structure;

[0014] Figure 4 A schematic diagram of a homogeneous glass double-glass photovoltaic laser melting packaging structure after melting is completed;

[0015] Figure 5 This is a cross-sectional diagram of the battery array after packaging;

[0016] Reference numerals:

[0017] Front panel glass 1, rear cover glass 2, groove 3, laser melting area 4, continuous closed melting mark 4-1, slope 5. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] A homogeneous glass double-glass photovoltaic laser melting packaging structure, such as Figure 1 、 5 As shown, it includes a front panel glass 1 and a rear cover glass 2, and a groove 3 is provided in the middle of the front panel glass 1; a battery array and packaging material are arranged in the groove 3; a laser melting area 4 is provided at the edge portion between the groove 3 and the front panel glass 1, and the laser melting area 4 remains transparent; after the front panel glass 1 and the rear cover glass 2 are laser welded, a continuous closed melting mark 4-1 surrounding and closing the groove 3 is formed in the laser melting area 4; the depth of the groove 3 is equal to the thickness of the battery array plus the thickness of the packaging material during lamination.

[0021] Specifically, the front glass panel 1 serves as the front protective layer of the module, with a groove 3 disposed in the center. The groove is designed to accommodate the photovoltaic cell array and packaging materials. The rear cover glass 2 is positioned opposite the front glass panel 1, together forming the module's external packaging structure. The photovoltaic cell array is located within the groove 3 and is the core power generation portion of the module. The packaging materials are also located within the groove 3, securing and protecting the photovoltaic cell array while also providing electrical insulation and moisture resistance. A laser melting area 4 is located at the edge between the groove 3 and the front glass panel 1. This area remains transparent to allow the laser to penetrate the glass and perform welding at the contact point between the front glass panel and the rear glass panel. After laser welding the front glass panel 1 and the rear cover glass 2 within the laser melting area 4, a continuous closed melt mark 4-1 is formed that surrounds and closes the groove 3. This welding method is highly precise and efficient, ensuring weld quality while reducing thermal stress and deformation during the welding process. The front glass panel 1 and the rear cover glass 2 are made of homogeneous glass material, which helps ensure the strength and stability of the joint after welding. Welding between homogeneous materials is more likely to form a tight fusion, thereby improving the sealing and durability of the component. The laser melting area 4 remains transparent, which allows the laser to penetrate this area and directly act on the welding part of the glass contact area. This design not only simplifies the welding process, but also improves the accuracy and controllability of welding. The continuous closed melt mark 4-1 surrounds and closes the groove 3, effectively isolating the external environment from the internal area of ​​the component. This closed structure can prevent moisture, dust and harmful substances from entering the interior of the component, thereby protecting the photovoltaic cell array and packaging materials from damage; the depth of the groove 3 and the thickness of the cell array plus the thickness of the packaging material during lamination are equal, so that after lamination, the packaging material can not only cover the outer slope of the groove, but also adhere well to the rear cover glass.

[0022] As a preferred embodiment of the above, Figure 1 As shown, a slope 5 is provided between the groove 3 and the laser melting area 4 , and the slope 5 is inclined downward from the outside to the inside.

[0023] Specifically, the design of the slope 5 increases the contact area between the packaging material and the front panel glass 1 and the rear cover glass 2, which not only helps the packaging material to better penetrate into the tiny gaps between the glass, but also enhances the adhesion between the packaging material and the glass, thereby improving the overall sealing performance. When the continuous sealed melt mark 4-1 is damaged, the packaging material in the slope 5 can still maintain sufficient sealing ability, so that water vapor and harmful substances need to bypass more complex paths during the penetration process, which increases the difficulty of penetration and effectively reduces the possibility of water vapor and harmful substances entering the interior of the photovoltaic module, thereby improving the moisture resistance, corrosion resistance and durability of the photovoltaic module.

[0024] As a preferred embodiment of the above, Figure 1 As shown, the light-facing glass in the groove 3 of the front panel glass 1 is embossed.

[0025] Specifically, embossing creates a bumpy texture on the glass surface, which alters the path of light, causing it to scatter and diffusely reflect. In photovoltaic modules, this scattering and diffuse reflection effect helps increase the time light stays on the panels, improving light utilization and ultimately increasing the module's power generation efficiency.

[0026] As a preferred embodiment of the above, Figure 2 As shown, the groove 3 is a rectangular structure as a whole.

[0027] Specifically, rectangular grooves can more efficiently utilize space. Given the same area, rectangular structures can accommodate more photovoltaic cells than other shapes, thereby improving the power generation efficiency and power output of photovoltaic modules and making them easier to install and secure. Furthermore, in the glass groove processing process, the glass rolling process can be used to form the grooves. For example, a dedicated mounting bracket or fixture can be used to secure the four corners of the rectangular groove, ensuring the stability and safety of the photovoltaic module during installation. The rectangular structure can also better block water.

[0028] As a preferred embodiment of the above, Figure 2 As shown, the rear cover glass 2 is provided with an opening to connect the battery array output to the external junction box. The front panel glass 1 and the rear cover glass 2 are welded and the battery array therein is sealed to form a laminate mounting frame and the junction box to form a photovoltaic module.

[0029] Specifically, by using laser-melted encapsulated laminates to form photovoltaic modules, the service life of the photovoltaic modules is further extended, material costs are reduced, the long-term reliability of the photovoltaic modules is improved, battery efficiency is ensured, and the application range of the photovoltaic modules is expanded.

[0030] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A laser melting packaging structure of a double-glass photovoltaic module with homogeneous glass, characterized by: It comprises a front panel glass (1) and a rear cover glass (2), wherein a groove (3) is provided in the middle of the front panel glass (1); A battery array and packaging materials are arranged in the groove (3); A laser melting area (4) is provided at the edge portion between the groove (3) and the front panel glass (1), and the laser melting area (4) remains transparent; After laser welding, the front panel glass (1) and the rear cover glass (2) form a continuous closed melting mark (4-1) in the laser melting area (4) that surrounds and closes the groove (3).

2. The laser melting packaging structure of a double-glass photovoltaic module of homogeneous glass according to claim 1 is characterized in that: The depth of the groove (3) is equal to the thickness of the battery array plus the thickness of the packaging material during lamination.

3. The laser melting packaging structure of a double-glass photovoltaic module of homogeneous glass according to claim 2 is characterized in that: A slope (5) is provided between the groove (3) and the laser melting area (4), and the slope (5) slopes downward from the outside to the inside; the groove (3) is a rectangular structure as a whole.

4. The laser melting packaging structure of a double-glass photovoltaic module of homogeneous glass according to claim 3 is characterized in that: The light-facing glass in the groove (3) of the front panel glass (1) is embossed.

5. The laser melting packaging structure of a double-glass photovoltaic module of homogeneous glass according to claim 4 is characterized in that: The rear cover glass (2) is provided with an opening to connect the battery array output to an external junction box. The front panel glass (1) and the rear cover glass (2) are welded and the battery array therein is sealed to form a laminate mounting frame and the junction box to form a photovoltaic module.

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