CN209592059U - A kind of BIPV photovoltaic module - Google Patents

Abstract

The utility model discloses a BIPV photovoltaic assembly, which comprises a crystalline silicon photovoltaic assembly. The crystalline silicon photovoltaic assembly includes a front plate glass, an encapsulation film, a crystalline silicon cell string, and a back plate glass. The crystalline silicon cell string includes a plurality of crystalline silicon cell sheets. , There is a light-transmitting gap between the crystalline silicon cells and/or between the crystalline silicon cell strings; the BIPV photovoltaic module also includes a thin-film photovoltaic module arranged under the back glass, and the thin-film photovoltaic module includes a thin-film battery. In the technical solution disclosed in this application, crystalline silicon solar cells generate electricity by using sunlight irradiated from the front plate glass, and thin-film cells mostly use sunlight irradiated from the light-transmitting gap to generate electricity. Since the power generation efficiency of crystalline silicon photovoltaic modules is relatively low It is high and has a light-transmitting gap inside, and because the thin-film photovoltaic module located under the crystalline silicon photovoltaic module can use sunlight to generate electricity, and it has little impact on daylighting, it makes the photovoltaic building not only have better daylighting effects, but also have High output power.

Description

A BIPV photovoltaic module

technical field

The utility model relates to the technical field of photovoltaic components, in particular to a BIPV photovoltaic component.

Background technique

BIPV (Building Integrated Photovoltaic) technology integrates photovoltaic modules into buildings, so that they can not only have the function of generating electricity, but also can be used as building materials.

At present, photovoltaic modules used in BIPV are mainly crystalline silicon modules and thin-film modules. Among them, crystalline silicon modules have a relatively high absorption rate of light and high power generation efficiency, and thin-film modules have a relatively low absorption rate of light. Small and relatively low power generation efficiency. The crystalline silicon photovoltaic module used in BIPV adopts double-glass design, which is mainly divided into two structures: almost no gap between the cells and a large gap between the cells. Among them, there is almost no gap between the cells Although the structure can meet the output power requirements of photovoltaic buildings, it will reduce the lighting effect of photovoltaic buildings, and the structure with large gaps between cells can meet the lighting requirements of photovoltaic buildings, but it will reduce the lighting effect of photovoltaic buildings per unit photovoltaic building area. The power generation efficiency is relatively low, which will reduce the output power of photovoltaic buildings; although the thin-film photovoltaic modules used in BIPV have little effect on the lighting of photovoltaic buildings, due to their low power generation efficiency, the output power of photovoltaic buildings will be reduced .

To sum up, how to make a photovoltaic building not only have a better lighting effect but also have a higher output power is a technical problem to be solved urgently by those skilled in the art.

Utility model content

In view of this, the purpose of this utility model is to provide a BIPV photovoltaic module, so that the photovoltaic building not only has a better lighting effect, but also has a higher output power.

In order to achieve the above object, the utility model provides the following technical solutions:

A BIPV photovoltaic module, comprising a crystalline silicon photovoltaic module, the crystalline silicon photovoltaic module sequentially includes a front glass, an encapsulation film, a crystalline silicon battery string, and a back glass from top to bottom, and the crystalline silicon battery string includes a plurality of Crystalline silicon battery slices, a light-transmitting gap is set between the crystalline silicon battery slices and/or between the crystalline silicon battery strings;

The BIPV photovoltaic module further includes a thin film photovoltaic module disposed under the back glass, wherein the thin film photovoltaic module includes a thin film battery.

Preferably, the thin film battery is located right below the light-transmitting gap.

Preferably, a hollow layer is formed between the crystalline silicon photovoltaic module and the thin film photovoltaic module, and reinforcements are provided at both ends of the hollow layer.

Preferably, the reinforcing member is a separator sealant.

Preferably, the height of the hollow layer is 4-10mm.

Preferably, the crystalline silicon cell is a half-cut crystalline silicon cell.

Preferably, the crystalline silicon cell is a busbar-free cell.

Preferably, the crystalline silicon battery string is a shingled battery string.

Preferably, the thin film photovoltaic module is any one of amorphous silicon photovoltaic module, cadmium telluride photovoltaic module, copper indium gallium selenide photovoltaic module and dye-sensitized photovoltaic module.

Preferably, the packaging film is EVA film or PVB film.

The utility model provides a BIPV photovoltaic assembly, which includes a crystalline silicon photovoltaic assembly. The crystalline silicon photovoltaic assembly sequentially includes a front glass, an encapsulation film, a crystalline silicon battery string, and a back glass from top to bottom. The crystalline silicon battery string includes multiple A crystalline silicon battery sheet, and a light-transmitting gap is arranged between the crystalline silicon battery sheets and/or between the crystalline silicon battery strings; the BIPV photovoltaic module also includes a thin film photovoltaic module arranged under the back glass, wherein the thin film photovoltaic module includes a thin film Battery.

In the above technical solution disclosed in this application, light-transmitting gaps are provided between the crystalline silicon cells and/or crystalline silicon cell strings contained in the crystalline silicon photovoltaic modules, and a thin film is provided under the back glass contained in the crystalline silicon photovoltaic modules. Photovoltaic modules, crystalline silicon solar cells use the sunlight irradiated from the front glass to generate electricity, while thin-film cells mostly use the sunlight irradiated from the light-transmitting gap to generate electricity, because the power generation efficiency of crystalline silicon photovoltaic modules is relatively high and the internal There is a light-transmitting gap, and because the thin-film photovoltaic module located under the crystalline silicon photovoltaic module can generate electricity by using the sunlight irradiated from the light-transmitting gap, and because the thin-film photovoltaic module has little influence on daylighting, it makes the photovoltaic The building not only has good lighting effect, but also has high output power.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a schematic structural diagram of a BIPV photovoltaic module provided by an embodiment of the present invention;

Fig. 2 is a top view of the first embodiment of a BIPV photovoltaic module provided by the embodiment of the present invention;

Fig. 3 is a top view of a second embodiment of a BIPV photovoltaic module provided by an embodiment of the present invention;

Fig. 4 is a top view of a third embodiment of a BIPV photovoltaic module provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Fig. 1 and Fig. 2, Fig. 1 shows a schematic structural diagram of a BIPV photovoltaic module provided by an embodiment of the present invention, and Fig. 2 shows the first structure of a BIPV photovoltaic module provided by an embodiment of the present invention Example top view. A BIPV photovoltaic module provided by the embodiment of the utility model may include a crystalline silicon photovoltaic module 1, and the crystalline silicon photovoltaic module 1 may include a front plate glass 11, an encapsulation film 12, a crystalline silicon battery string 13, a rear The plate glass 14 and the crystalline silicon battery string 13 may include a plurality of crystalline silicon battery slices 131, and a light-transmitting gap is arranged between the crystalline silicon battery slices 131 and/or between the crystalline silicon battery strings 13;

The BIPV photovoltaic module may also include a thin film photovoltaic module 2 disposed under the back glass 14 , wherein the thin film photovoltaic module 2 may include a thin film battery 21 .

The BIPV photovoltaic module may include a crystalline silicon photovoltaic module 1 and a thin film photovoltaic module 2 located below the crystalline silicon photovoltaic module 1 . The crystalline silicon photovoltaic module 1 includes a front plate glass 11, an encapsulation film 12, a crystalline silicon cell string 13, and a back glass 14 from top to bottom. The crystalline silicon cell string 13 includes a plurality of crystalline silicon cells 131, and 131 are connected in series and parallel to increase the output voltage and output current of the crystalline silicon photovoltaic module 1 . The thin-film photovoltaic module 2 located under the crystalline silicon photovoltaic module 1 (ie, under the back glass 14 included in the crystalline silicon photovoltaic module 1 ) includes a thin-film battery 21 to convert absorbed solar energy into electrical energy. It should be noted that the outlets between the crystalline silicon photovoltaic module 1 and the thin film photovoltaic module 2 can be independent of each other. Of course, non-independent outlets can also be used, wherein the non-independent outlet is the crystalline silicon photovoltaic module 1 The outgoing lines of the thin film photovoltaic module 2 and the outgoing lines of the thin film photovoltaic module 2 are connected in series and parallel to each other before the outgoing lines are carried out.

In the crystalline silicon photovoltaic module 1 on the upper layer, there is a light-transmitting gap between the crystalline silicon cells 131 and/or between the crystalline silicon battery strings 13, and the light-transmitting gap is completely transparent, that is, the crystalline silicon photovoltaic module 1 on the upper layer The hollowed-out design is adopted, and the hollowed-out part is fully transparent. When sunlight irradiates from the front glass 11 to the light-transmitting gap, the light-transmitting gap can allow the sunlight to enter the interior of the crystalline silicon photovoltaic module 1 and irradiate the thin-film photovoltaic module 2 through the back glass 14 . Since the thin-film photovoltaic module 2 has little effect on daylighting, when sunlight hits the light-transmitting gap of the crystalline silicon photovoltaic module 1, part of the sunlight will pass through the thin-film photovoltaic module 2 and irradiate the interior of the photovoltaic building. , while the other part of the light will be absorbed by the thin-film battery 21 to generate electricity; when sunlight shines on the crystalline silicon cell 131 from the front glass 11, the crystalline silicon cell 131 can directly use this part of the sunlight to generate electricity .

Since the thin-film photovoltaic module 2 absorbs sunlight to generate electricity and has relatively little impact on daylighting, and because the power generation efficiency of the crystalline silicon photovoltaic module 1 is relatively high, compared with existing solar cells, there are large gaps between them. structure, the thin-film photovoltaic module 2 placed under the light-transmitting gap in this application can absorb part of the sunlight to generate electricity, therefore, the output power of the photovoltaic building can be improved; compared with the existing cells with almost no gaps structure, the light-transmitting gap provided in this application can allow sunlight to pass through and can be irradiated into the interior of the photovoltaic building through the thin-film photovoltaic module 2, so the lighting effect of the photovoltaic building can be improved; compared with the existing only Including the structure of thin-film photovoltaic modules, the crystalline silicon photovoltaic module 1 set in this application can increase the output power of photovoltaic buildings. Therefore, by organically combining the crystalline silicon photovoltaic module 1 and the thin-film photovoltaic module 2, the Photovoltaic buildings not only have good lighting effects, but also have high output power.

It should be noted that the size of the light-transmitting gap can be set in advance according to the requirements of photovoltaic buildings for lighting and output power. Of course, it can also be adjusted accordingly according to actual application conditions, so that BIPV photovoltaic modules have both Good lighting effect and high output power.

In the above technical solution disclosed in this application, light-transmitting gaps are provided between the crystalline silicon cells and/or crystalline silicon cell strings contained in the crystalline silicon photovoltaic modules, and a thin film is provided under the back glass contained in the crystalline silicon photovoltaic modules. Photovoltaic modules, crystalline silicon solar cells use the sunlight irradiated from the front glass to generate electricity, while thin-film cells mostly use the sunlight irradiated from the light-transmitting gap to generate electricity, because the power generation efficiency of crystalline silicon photovoltaic modules is relatively high and the internal There is a light-transmitting gap, because the power generation efficiency of the crystalline silicon photovoltaic module is relatively high and there is a light-transmitting gap inside, and because the thin-film photovoltaic module located under the crystalline silicon photovoltaic module can use the sunlight irradiated from the light-transmitting gap to generate electricity , and because the thin-film photovoltaic modules have relatively little influence on daylighting, therefore, the photovoltaic building not only has better daylighting effect, but also has higher output power.

In the BIPV photovoltaic module provided by the embodiment of the utility model, the thin-film battery 21 can be located directly below the light-transmitting gap.

Considering that the crystalline silicon battery sheet 131 has a good absorption and utilization effect on sunlight, in order to make the thin film battery 21 absorb and utilize sunlight with a relatively consistent intensity, so as to improve the consistency of the output current and voltage of the thin film photovoltaic module 2 , the thin-film battery 21 can be arranged directly under the light-transmitting gap instead of the thin-film battery 21 directly under the crystalline silicon solar cell 131 , thereby improving the quality of the electric energy output by the thin-film photovoltaic module 2 .

In the BIPV photovoltaic module provided by the embodiment of the utility model, a hollow layer 3 can be formed between the crystalline silicon photovoltaic module 1 and the thin film photovoltaic module 2 , and reinforcements 4 are provided at both ends of the hollow layer 3 .

Considering that the crystalline silicon photovoltaic module 1 will generate a certain amount of heat during the power generation process, and the accumulation of heat will affect the power generation efficiency of the crystalline silicon photovoltaic module 1 and the thin film photovoltaic module 2, and the accumulation of heat will have a negative impact on photovoltaic buildings and near photovoltaic The user of the building will have a certain impact. Therefore, a hollow layer 3 can be formed between the crystalline silicon photovoltaic module 1 and the thin-film photovoltaic module 2, so that the hollow layer 3 can be used to dissipate heat, thereby avoiding excessive temperature and improving The power generation efficiency of the crystalline silicon photovoltaic module 1 and the thin film photovoltaic module 2 improves the output power of the photovoltaic building and reduces damage to the photovoltaic building and users close to the photovoltaic building.

Wherein, two ends of the hollow layer 3 are provided with reinforcements 4 to fix the surroundings, so as to ensure that the crystalline silicon photovoltaic module 1 on the upper layer and the thin film photovoltaic module 2 on the lower layer are connected together.

In a BIPV photovoltaic module provided by an embodiment of the present invention, the reinforcing member 4 may be a partition sealant.

The reinforcements 4 provided at both ends of the hollow layer 3 may specifically be separator sealant, so as to bond the crystalline silicon photovoltaic module 1 and the thin film photovoltaic module 2 together to form the hollow layer 3 .

In the BIPV photovoltaic module provided by the embodiment of the present invention, the height of the hollow layer 3 can be 4-10 mm.

The height of the hollow layer 3 formed between the crystalline silicon photovoltaic module 1 and the thin film photovoltaic module 2 can be specifically between 4-10 mm, so that the hollow layer 3 can play a better role in heat dissipation.

Of course, the height of the hollow layer 3 can also be adjusted according to actual needs.

Referring to FIG. 3 , it shows a top view of a second embodiment of a BIPV photovoltaic module provided by an embodiment of the present invention. In the BIPV photovoltaic module provided by the embodiment of the utility model, the crystalline silicon cell 131 may be a half-chip crystalline silicon cell.

The crystalline silicon cells 131 included in the crystalline silicon photovoltaic module 1 may specifically be half-chip crystalline silicon cells, that is, half-chip crystalline silicon cells obtained by cutting a full-sheet crystalline silicon cell in half.

Since the photovoltaic module composed of half-chip silicon cells can reduce the internal friction of the internal circuit, reduce shading loss, reduce heat generation, and reduce temperature rise loss, the application of half-chip silicon cells in BIPV photovoltaic modules can improve its reliability. and safety, and can increase the output power of photovoltaic buildings.

Of course, it is also possible to directly apply full-chip silicon cells in BIPV photovoltaic modules to reduce the cost of BIPV photovoltaic modules. In addition, one-third crystalline silicon cells, one-fifth crystalline silicon cells and the like can also be applied to the crystalline silicon photovoltaic module 1 . Wherein, the crystalline silicon cell 131 may be a monocrystalline silicon cell or a polycrystalline silicon cell, and the present application does not make any limitation on the type of the crystalline silicon cell 131 .

It should be noted that the half-chip crystalline silicon cell and the full-chip crystalline silicon cell may include more than 3 busbars to better collect the current generated by the crystalline silicon cell 131 .

In a BIPV photovoltaic module provided by an embodiment of the present invention, the crystalline silicon cell 131 may be a non-busbar cell.

The crystalline silicon cell 131 used in the crystalline silicon photovoltaic module 1 may be a busbarless cell, specifically, it may be prepared through a back-contact packaging process.

The application of busbar-free solar cells in BIPV photovoltaic modules can reduce the shielding of the grid lines to the crystalline silicon solar cells 131 , thereby improving the power generation efficiency of the crystalline silicon photovoltaic modules 1 and increasing the output power of the crystalline silicon photovoltaic modules 1 .

Referring to FIG. 4 , it shows a top view of a third embodiment of a BIPV photovoltaic module provided by an embodiment of the present invention. In the BIPV photovoltaic module provided by the embodiment of the utility model, the crystalline silicon battery string 13 may be a shingled battery string.

The crystalline silicon cell strings 13 contained in the crystalline silicon photovoltaic module 1 can specifically be shingled cell strings, that is, the cell strings obtained by connecting crystalline silicon cell sheets 131 in the form of shingles, which can reduce the shielding of welding strips, and can With the same module area, more crystalline silicon solar cells 131 are laid, so the output power of the crystalline silicon photovoltaic module 1 can be increased, thereby increasing the output power of the BIPV photovoltaic module.

In the BIPV photovoltaic module provided by the embodiment of the present invention, the thin-film photovoltaic module 2 can be any one of amorphous silicon photovoltaic module, cadmium telluride photovoltaic module, copper indium gallium selenium photovoltaic module, and dye-sensitized photovoltaic module.

The thin-film photovoltaic module 2 used in the BIPV photovoltaic module can specifically be any one of amorphous silicon photovoltaic module, cadmium telluride photovoltaic module, copper indium gallium selenium photovoltaic module, and dye-sensitized photovoltaic module, so as to receive light from the light-transmitting gap The sunlight irradiated from the place, and use this part of the sunlight to generate electricity, and reduce the impact on daylighting.

In the BIPV photovoltaic module provided by the embodiment of the present invention, the encapsulating adhesive film 12 may be an EVA adhesive film or a PVB adhesive film.

The encapsulation adhesive film 12 contained in the crystalline silicon photovoltaic module 1 can specifically be EVA (Ethylene-vinyl acetatecopolymer, ethylene-vinyl acetate copolymer) adhesive film or PVB (Polyvinyl butyral, polyvinyl formal) adhesive film, to The silicon battery sheet 131 plays the role of fixing and sealing.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that elements inherent in a process, method, article, or apparatus including a series of elements are included. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element. In addition, the part of the above technical solution provided by the embodiment of the utility model that is consistent with the realization principle of the corresponding technical solution in the prior art has not been described in detail, so as not to repeat it too much.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A BIPV photovoltaic assembly, characterized in that it comprises a crystalline silicon photovoltaic assembly, and the crystalline silicon photovoltaic assembly comprises front glass, encapsulation film, crystalline silicon cell strings, and back glass successively from top to bottom. The silicon battery string includes a plurality of crystalline silicon battery slices, and a light-transmitting gap is arranged between the crystalline silicon battery slices and/or between the crystalline silicon battery strings; The BIPV photovoltaic module further includes a thin film photovoltaic module disposed under the back glass, wherein the thin film photovoltaic module includes a thin film battery. 2. The BIPV photovoltaic module according to claim 1, wherein the thin film battery is located directly below the light-transmitting gap. 3. The BIPV photovoltaic module according to claim 1 or 2, wherein a hollow layer is formed between the crystalline silicon photovoltaic module and the thin-film photovoltaic module, and reinforcements are provided at both ends of the hollow layer. 4. The BIPV photovoltaic module according to claim 3, characterized in that, the reinforcing member is a separator sealant. 5. The BIPV photovoltaic module according to claim 3, wherein the height of the hollow layer is 4-10mm. 6. The BIPV photovoltaic module according to claim 3, wherein the crystalline silicon cell is a half-chip crystalline silicon cell. 7. The BIPV photovoltaic module according to claim 3, wherein the crystalline silicon cells are busbar-free cells. 8. The BIPV photovoltaic module according to claim 3, wherein the crystalline silicon battery string is a shingled battery string. 9. The BIPV photovoltaic assembly according to claim 3, wherein the thin film photovoltaic assembly is any one of amorphous silicon photovoltaic assembly, cadmium telluride photovoltaic assembly, copper indium gallium selenide photovoltaic assembly, dye-sensitized photovoltaic assembly A sort of. 10. The BIPV photovoltaic module according to claim 1, wherein the encapsulation adhesive film is an EVA adhesive film or a PVB adhesive film.