Colored glaze BIPV photovoltaic module

Abstract

The utility model discloses a colored glaze building integrated photovoltaics (BIPV) photovoltaic module, which is characterized in that the module is formed by sequentially and downwards pressing colored glaze glass, a front adhesive film, a colored adhesive film filler strip, a battery pack, a colored back adhesive film, a back adhesive film and toughened glass from a light receiving surface in a laminating machine and finally pressing by a pneumatic kettle, positive and negative electrodes of the battery pack are led out, and a colored glaze surface of the colored glaze glass faces the light receiving surface. According to the utility model, since the colored glaze surface is arranged outside, the assembly with purer color can be obtained, the appearance of the assembly is more attractive, and the assembly can be more suitable for various BIPV application scenes; by adopting two-stage lamination packaging combining prepressing of a laminating machine and final pressing of an air pressure kettle, bubbles can be reduced, the bonding strength and the peel strength between structural layers are enhanced, the excellent performance and the long-term stability of the assembly are ensured, and the yield of the assembly is greatly improved through the two-stage lamination packaging.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaics, and specifically relates to a colored glaze BIPV photovoltaic component. Background Art

[0002] Photovoltaic technology has more and more application scenarios, and the products are becoming more and more abundant. Photovoltaic modules have many application fields. When applied to specific products, they usually need to be combined with related fields, which makes the appearance and color of modules in BIPV scenarios more and more demanding. From a structural point of view, photovoltaic modules usually adopt a double-glass structure, that is, the main structure includes two layers of glass and the battery cell in the middle. In addition to the battery cell, the surface glass also plays an important role and needs to meet the requirements of light transmission, protection of the battery cell and aesthetics. In order to improve the conversion efficiency of photovoltaic modules and provide protection for photovoltaic modules, commonly used glass sheets include flat glass and rolled velvet glass. The former has a smooth surface, which can provide better light transmittance and better protection. The latter has an irregular surface and presents a sandpaper-like texture, which can reduce light reflection and have a better scattering effect.

[0003] Most of the conventional BIPV modules in the current industry are transparent double-glass modules, and the cells are mainly P-type monocrystalline and N-type monocrystalline cells. Although the building material function in the BIPV scenario can be realized, the cells and welding strips are directly visible from the appearance, and the aesthetics are severely limited. In addition, the components are of a single color, and most are transparent. A few use colored films or colored coated glass to match the BIPV scene. For example, patent CN202223009126.4 discloses a color BIPV photovoltaic module structure, but it is difficult to solve the problem of visible cells and welding strips, and the appearance color is greatly reduced, which is difficult to meet the increasingly demanding BIPV scenarios; the conventional colored double-glass BIPV modules in the current industry are mostly visible cells and welding strips, which makes it difficult to achieve a truly pure color module, and a new type of color BIPV photovoltaic module is needed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that conventional colored double-glass BIPV modules in the above-mentioned background technology mostly have visible cells and welding strips, making it difficult to achieve a truly pure color module, and to provide a colored glaze BIPV photovoltaic module. The utility model has a colored glaze surface on the outside, which can obtain a module with purer color and visually completely invisible cells, welding strips, and bus bars. The module looks more beautiful and can be better adapted to various BIPV application scenarios.

[0005] The technical solution adopted by the utility model is:

[0006] A colored glaze BIPV photovoltaic module, characterized in that: the module is formed from the light-receiving surface downward in sequence by colored glaze glass, front adhesive film, colored adhesive film pad, battery pack, colored back adhesive film, back adhesive film, tempered glass laminator pre-pressing and autoclave final pressing, and the positive and negative electrodes of the battery pack are led out, and the colored glaze surface of the colored glaze glass faces the light-receiving surface. Since the colored glaze surface is outside, a more pure color module can be obtained, the module appearance is more beautiful, and it can be more suitable for various BIPV application scenarios.

[0007] The colored glaze glass is colored glaze ultra-white embossed tempered glass, one side is embossed, the other side is glazed, the light transmittance is 55% to 85%, the thickness is 1.1mm to 10mm, and the glazed surface of the colored glaze glass faces the light-receiving surface. Compared with the colored glaze surface, the color of the component can be darker and more correct, and the appearance can completely eliminate the visual perception of the battery cell, achieving a pure color effect.

[0008] The front adhesive film and the back adhesive film are both photovoltaic-grade high-transmittance films, made of any one or a combination of two or more of ethylene-vinyl acetate copolymer, polyvinyl butyral, and polyolefin elastomer, with a thickness of 0.38mm to 1.14mm. The thickness of the front adhesive film and the back adhesive film is adjusted according to the thickness of the colored glaze glass front plate and the tempered glass back plate.

[0009] The color film pad and the color adhesive film are both photovoltaic grade color high-transmittance films, made of any one or a combination of two or more of ethylene-vinyl acetate copolymer, polyvinyl butyral, and polyolefin elastomer, with a thickness of 0.38mm to 1.14mm. The thickness of the color film pad and the color adhesive film is adjusted according to the thickness of the colored glaze glass front plate and the tempered glass back plate.

[0010] The battery cells in the battery string of the battery pack adopt a stacked negative spacing welding design, the width of the overlapping part is 0.5mm to 1mm, the battery cells are connected in series by welding with welding strips, and the positive and negative electrodes of the battery pack are led out between the battery strings through bus bars.

[0011] The battery cells of the battery pack are XBC cells, interdigitated back contact cells (or IBC solar cells), ABC solar cells (ABC stands for All Back Contact) or composite passivated back contact cells (or HPBC solar cells).

[0012] The welding strips and bus bars are all tinned copper flat welding strips, and the specifications of the welding strips and bus bars are adjusted accordingly according to the size of the component version and the current size in the component.

[0013] The tempered glass is ultra-white embossed tempered glass with a thickness of 1.1 mm to 10 mm.

[0014] A layer of high temperature resistant film is flatly adsorbed on the colored glaze glass to protect the colored glaze surface and prevent the colored glaze surface from being damaged during component production and transportation, and the film is not uncovered and installed until before installation.

[0015] The length of the colored adhesive film pad is consistent with the size of the component, and the width covers the battery cell by 5mm to 10mm, so as to cover the bus bar and the welding strip between the bus bar and the battery cell.

[0016] The beneficial effects of the utility model are: 1) The glaze surface of the glazed glass of the conventional glazed component is on the inside, and it is difficult to avoid the vague visibility of the battery cells, welding strips, and bus bars in the visual appearance. The main reason is that the color depth of the glazed surface is reduced visually and cannot completely cover the color of the battery cells and other colors. The glazed surface of the component of the utility model is on the outside, and a component with purer color can be obtained, and the battery cells, welding strips, and bus bars are completely invisible visually. The component appearance is more beautiful and can be more adaptable to various BIPV application scenarios.

[0017] 2) By using the stacking welding technology with negative spacing of the cells in the battery string, compared with the conventional spacing type battery string, the welding strip is completely invisible on the front of the battery string, and the appearance of the manufactured module is more beautiful;

[0018] 3) During layout, colored film pads are inserted at the end soldering strips and bus bars. The colored film pads are placed between the high-transparency front film and the battery string to cover the soldering strips and bus bars, making the soldering strips and bus bars completely invisible on the front of the component.

[0019] 4) By adopting a two-stage lamination packaging that combines pre-pressing by a laminator and final pressing by an autoclave, the generation of bubbles can be reduced, the bonding strength and peeling strength between the structural layers can be enhanced, and the excellent performance and long-term stability of the components can be ensured. This two-stage lamination packaging greatly improves the component yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 This is a schematic diagram of a battery string of the present utility model.

[0022] Figure 3 Schematic diagram of the battery string of the existing components. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0024] like Figure 1As shown, the utility model is a colored glaze BIPV photovoltaic module, characterized in that: the module is formed by pre-pressing the colored glaze glass 1, the front adhesive film 2, the colored adhesive film pad 3, the battery pack 4, the colored back adhesive film 5, the back adhesive film 6, and the tempered glass 7 from the light-receiving surface downward, and the positive and negative electrodes of the battery pack 4 are led out, and the colored glaze surface of the colored glaze glass 1 faces the light-receiving surface. The length of the colored adhesive film pad 3 is consistent with the size of the module, and the width covers the battery sheet by 5mm to 10mm.

[0025] The colored glaze glass 1 is a colored glaze ultra-white embossed tempered glass, one side is an embossed surface, the other side is a glazed surface, the light transmittance is 55% to 85%, the thickness is 1.1 mm to 10 mm, and the glazed surface of the colored glaze glass faces the light-receiving surface;

[0026] The front adhesive film 2 and the back adhesive film 6 are both photovoltaic grade high-transmittance films made of ethylene-vinyl acetate copolymer with a thickness of 0.38 mm to 1.14 mm. They can also be made of polyvinyl butyral or polyolefin.

[0027] The color adhesive film strip 3 and the color adhesive film 5 are both photovoltaic grade color high-transmittance films made of ethylene-vinyl acetate copolymer with a thickness of 0.38 mm to 1.14 mm. Polyvinyl butyral or polyolefin can also be used.

[0028] The battery cells 41 in the battery string of the battery pack 4 are partially overlapped, and the width of the overlapping portion is 0.5 mm to 1 mm. The battery cells are welded together by welding strips 42. Figure 2 As shown, the front welding strip of the component is completely shielded, and the positive and negative electrodes of the battery pack 4 are led out through the bus bar 43 between each battery string. The end 42 welding strip and the bus bar 43 are supplemented with a colored film pad 3 for shielding; the battery cells 41 in the battery string of the conventional battery pack 4 are welded together by welding strips 42, and there are gaps between each battery cell, such as Figure 3 As shown. The battery cell of the battery pack 4 is an XBC battery cell, and of course, an interdigitated back contact battery cell, an ABC solar cell cell or a composite passivated back contact battery cell can also be used. The welding strip 42 and the bus bar 43 of the utility model are both tinned copper flat welding strips. The tempered glass 7 is an ultra-white embossed tempered glass with a thickness of 1.1 mm.

[0029] A layer of high temperature resistant film is laid flat on the colored glaze glass 1 to protect the colored glaze surface and prevent the colored glaze surface from being damaged during component production and transportation, and is not uncovered and installed until before installation.

[0030] The battery string is produced by using a string welding machine, so that each battery cell 41 is stacked and welded with a negative spacing. Compared with the conventional spacing battery string, the appearance is more beautiful, and a pure color glaze component can be obtained after installation.

[0031] 1) The glaze surface of the glazed glass of conventional glazed modules is on the inside, and it is difficult to avoid the vague visibility of the battery cells, welding strips, and bus bars in the visual appearance. The main reason is that the color depth of the glazed surface is reduced visually, and it cannot completely cover the color of the battery cells and other colors. The glazed surface of the module of the utility model is on the outside, and a module with purer color can be obtained, and the battery cells, welding strips, and bus bars are completely invisible visually. The appearance of the module is more beautiful and can be more adapted to various BIPV application scenarios.

[0032] 2) By using the stacking string welding technology with negative spacing of battery cells, compared with the conventional spacing battery string, the welding strip is completely invisible on the front of the battery string, and the appearance of the manufactured component is more beautiful;

[0033] 3) During layout, colored adhesive film pads are inserted under the end soldering strips and bus bars. The colored adhesive film pads are placed between the highly transparent front adhesive film and the battery pack to cover the soldering strips and bus bars, so that the soldering strips and bus bars are completely invisible on the front of the component.

[0034] 4) By adopting a two-stage lamination packaging that combines pre-pressing by a laminator and final pressing by an autoclave, the generation of bubbles can be reduced, the bonding strength and peeling strength between the structural layers can be enhanced, and the excellent performance and long-term stability of the components can be ensured. This two-stage lamination packaging greatly improves the component yield.

Claims

1. A colored glaze BIPV photovoltaic module, characterized in that: The assembly is formed by pre-pressing the colored glaze glass (1), the front adhesive film (2), the colored adhesive film pad (3), the battery pack (4), the colored back adhesive film (5), the back adhesive film (6), and the tempered glass (7) in sequence from the light-receiving surface downwards by a laminator and final pressing in an autoclave, and the positive and negative electrodes of the battery pack (4) are led out, and the colored glaze surface of the colored glaze glass (1) faces the light-receiving surface.

2. A colored glaze BIPV photovoltaic module according to claim 1, characterized in that: The colored glaze glass (1) is colored glaze ultra-white embossed tempered glass, one side is an embossed surface, the other side is a glazed surface, the light transmittance is 55% to 85%, the thickness is 1.1 mm to 10 mm, and the glazed surface of the colored glaze glass faces the light-receiving surface.

3. The colored glaze BIPV photovoltaic module according to claim 1, characterized in that: The front adhesive film (2) and the back adhesive film (6) are both photovoltaic-grade high-transmittance films, made of any one or a combination of two or more of ethylene-vinyl acetate copolymer, polyvinyl butyral, and polyolefin elastomer, and have a thickness of 0.38 mm to 1.14 mm.

4. The colored glaze BIPV photovoltaic module according to claim 1, characterized in that: The color adhesive film pad (3) and the color adhesive backing film (5) are both photovoltaic-grade color high-transmittance films, made of any one or a combination of two or more of ethylene-vinyl acetate copolymer, polyvinyl butyral, and polyolefin elastomer, and have a thickness of 0.38 mm to 1.14 mm.

5. The colored glaze BIPV photovoltaic module according to claim 1, characterized in that: The battery cells in the battery string of the battery pack (4) are welded in a negative spacing design, the width of the overlapping portion is 0.5 mm to 1 mm, the battery cells are welded in series into one body via welding strips (42), and the positive and negative electrodes of the battery pack (4) are led out between the battery strings via bus bars (43).

6. The colored glaze BIPV photovoltaic module according to claim 5, characterized in that: The battery cells of the battery pack (4) are XBC battery cells, interdigitated back contact battery cells, ABC solar battery cells or composite passivated back contact battery cells.

7. The colored glaze BIPV photovoltaic module according to claim 5, characterized in that: The welding strip (42) and the bus bar (43) are both tinned copper flat welding strips.

8. The colored glaze BIPV photovoltaic module according to claim 1, characterized in that: The tempered glass (7) is ultra-white embossed tempered glass with a thickness of 1.1 mm to 10 mm.

9. The colored glaze BIPV photovoltaic module according to claim 1, characterized in that: A layer of high temperature resistant film is flatly spread and adsorbed on the colored glaze glass.

10. The colored glaze BIPV photovoltaic module according to claim 5, characterized in that: The length of the colored adhesive film pad (3) is consistent with the size of the component, and the width covers the battery sheet by 5 mm to 10 mm.

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