CN216311805U - Photovoltaic module's backplate and photovoltaic module - Google Patents
Photovoltaic module's backplate and photovoltaic module Download PDFInfo
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- CN216311805U CN216311805U CN202121789983.3U CN202121789983U CN216311805U CN 216311805 U CN216311805 U CN 216311805U CN 202121789983 U CN202121789983 U CN 202121789983U CN 216311805 U CN216311805 U CN 216311805U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The embodiment of the utility model provides a back plate of a photovoltaic module and the photovoltaic module. The back sheet of the photovoltaic module comprises: the back plate body and the black layer are arranged in a stacked mode; the black layer comprises organic black dye and a plurality of reflective particles, wherein each particle is coated with the organic black dye, and the organic black dye forms a dye layer; the dye layer is provided with a first conversion layer, the first conversion layer is coated on the dye layer, the first conversion layer is used for converting light from a first wavelength to a second wavelength, and the first wavelength is smaller than the second wavelength.
Description
Technical Field
The utility model relates to the technical field of solar cells, in particular to a back plate of a photovoltaic module and the photovoltaic module.
Background
With the progress of science and technology, photovoltaic modules are more and more widely applied. Electricity is generally generated by photovoltaic modules to generate electricity, thereby avoiding the use of conventional energy sources for power generation, e.g., thermal power generation may be avoided. It is often desirable to make the photovoltaic module black and the backsheet of the photovoltaic module black. However, in the related art, the back plate of the photovoltaic module has a poor effect of reflecting light.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a back plate of a photovoltaic module and the photovoltaic module, and aims to solve the problem that the back plate of the photovoltaic module in the related art is poor in light reflection effect.
In order to solve the technical problem, the utility model is realized as follows:
in a first aspect, an embodiment of the present invention provides a backsheet for a photovoltaic module, where the backsheet for the photovoltaic module includes: the back plate body and the black layer are arranged in a stacked mode;
the black layer comprises organic black dye and a plurality of reflective particles, wherein each particle is coated with the organic black dye, and the organic black dye forms a dye layer;
the light source comprises a dye layer, a first conversion layer and a second conversion layer, wherein the dye layer is provided with the first conversion layer, the first conversion layer is coated on the dye layer, the first conversion layer is used for converting light from a first wavelength into a second wavelength, and the first wavelength is smaller than the second wavelength.
Optionally, the thickness of the first conversion layer is any value from 0.01 micrometers to 0.5 micrometers.
Optionally, the thickness of the dye layer is any value from 0.01 micrometers to 0.5 micrometers.
Optionally, the particles include at least one of titanium dioxide, glass powder, and aluminum powder.
Optionally, the particle size of the particles is any value between 0.5 microns and 2 microns.
In a second aspect, an embodiment of the present invention provides a back plate of a photovoltaic module, where the back plate of the photovoltaic module includes a back plate body, a black layer, and a second conversion layer, which are stacked;
the black layer comprises organic black dye and a plurality of reflective particles, wherein each particle is coated with the organic black dye, and the organic black dye forms a dye layer;
the second conversion layer is arranged on the surface, far away from the backboard body, of the black layer and used for converting a third wavelength of light into a fourth wavelength, and the third wavelength is smaller than the fourth wavelength.
Optionally, the thickness of the second conversion layer is any value between 5 microns and 50 microns.
Optionally, the particles include at least one of titanium dioxide, glass powder, and aluminum powder.
In a third aspect, an embodiment of the present invention provides a photovoltaic module, where the photovoltaic module includes the backsheet of the photovoltaic module described in any one of the first aspect.
In a fourth aspect, embodiments of the present invention provide a photovoltaic module, where the photovoltaic module includes the backsheet of the photovoltaic module described in any one of the second aspects.
In the embodiment of the utility model, the black layer is arranged on the back plate body and comprises organic black dye and a plurality of reflective particles, wherein each particle is coated with the organic black dye, and the organic black dye forms a dye layer. The dye layer is provided with a first conversion layer, and the first conversion layer is coated on the dye layer. Not only can make the black layer be difficult for discolouring, can also improve the performance of the reflection light of photovoltaic module's backplate.
Drawings
Fig. 1 shows one of the schematic views of a back sheet of a photovoltaic module according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a particle with a dye layer and a first conversion layer thereon according to an embodiment of the present invention;
fig. 3 is a second schematic view of a back sheet of a photovoltaic module according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a dye layer disposed on a particle according to an embodiment of the present invention.
Reference numerals:
10: a back plate body; 11: a resin layer; 12: a PET layer; 20: a black layer; 21: particles; 22: a dye layer; 23: a first conversion layer; 30: a second translation layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Referring to fig. 1, there is shown one of the schematic diagrams of a back sheet of a photovoltaic module according to an embodiment of the present invention; referring to fig. 2, a schematic diagram of a particle on which a dye layer and a first conversion layer are disposed is shown according to an embodiment of the present invention. As shown in fig. 1 and 2, the back sheet of the photovoltaic module includes: a back sheet body 10 and a black layer 20 which are laminated.
The black layer 20 includes an organic black dye and a plurality of light-reflecting particles 21, each particle 21 is coated with the organic black dye, and the organic black dye forms a dye layer 22. The dye layer 22 is provided with a first conversion layer 23, the first conversion layer 23 is coated on the dye layer 22, the first conversion layer 23 is used for converting light from a first wavelength to a second wavelength, and the first wavelength is smaller than the second wavelength.
Because backplate body 10 and black layer 20 range upon range of setting, black layer 20 includes organic black dyestuff and a plurality of granule 21 that reflect light, and the cladding has organic black dyestuff on every granule 21 that reflects light, and organic black dyestuff forms dyestuff layer 22, consequently, be equivalent to organic black dyestuff cladding on the granule 21 that reflects light for organic black dyestuff becomes a whole with the granule 21 that reflects light. Since the reflective particles 21 are not easy to move, after the organic black dye forms the dye layer 22 on the reflective particles 21, the organic black dye is not easy to move due to the effect of the reflective particles 21, thereby avoiding the problem that the organic black dye moves in the black layer 20 to cause the color change of the black layer 20. That is, in the embodiment of the present invention, the organic black dye is formed on the reflective particles 21 to form the dye layer 22 covering the reflective particles 21, so that the reflective particles 21 and the organic black dye are integrated, and the problem that the black layer 20 is discolored due to the movement of the organic black dye in the black layer 20 is avoided, so that the black layer 20 is not easily discolored.
In addition, when the first conversion layer 23 is coated on the dye layer 22, at this time, the particles 21 corresponding to the light reflection are firstly coated with a layer of organic black dye, that is, the dye layer 22 is disposed on the particles 21 corresponding to the light reflection, and then the first conversion layer 23 is disposed on the dye layer 22, so that the dye layer 22 is coated on the first conversion layer 23, that is, the dye layer 22 is coated on the particles 21 corresponding to the light reflection, and the first conversion layer 23 is coated on the dye layer 22. In this case, after the light irradiates on the back sheet of the photovoltaic module, the light first irradiates on the first conversion layer 23, and the first conversion layer 23 can convert the light from the first wavelength to the second wavelength, that is, from the short wavelength to the long wavelength, and then the light of the long wavelength irradiates on the reflective particles 21 and is reflected by the reflective particles 21. Since the black organic dye mainly absorbs short-wavelength light, in the embodiment of the utility model, the first conversion layer 23 is disposed to convert the light from single-wavelength short wavelength to long wavelength by the first conversion layer 23, so that the light absorbed by the black organic dye is reduced, the light reflected by the reflective particles 21 is increased, and the performance of the back plate of the photovoltaic module for reflecting light is improved.
In the embodiment of the present invention, a black layer 20 is disposed on the backplane body 10, the black layer 20 includes an organic black dye and a plurality of reflective particles 21, each particle 21 is coated with the organic black dye, and the organic black dye forms a dye layer 22. The dye layer 22 is provided with a first conversion layer 23, and the first conversion layer 23 is coated on the dye layer 22. Not only can the black layer 20 be difficult for discolouring, but also can improve the performance of the reflection light of the backplate of the photovoltaic module.
In addition, in the embodiment of the present invention, the first wavelength may be a wavelength smaller than 600 nanometers, and the second wavelength may be a wavelength greater than 600 nanometers, and of course, the first wavelength and the second wavelength may also be set according to actual needs, which is not limited herein.
It should be noted that, in the embodiment of the present invention, the first conversion layer 23 includes a conversion material, and the conversion material includes: y is2O3；ZnS；ZnSe；MgS；CaS；Mn，ErZnSe；Mn，ErMgS；Mn，ErCaS；Mn，ErZnS；Mn，YbZnSe；Mn，YbMgS；Mn，YbCaS；Mn，YbZnS：Tb3+，Er3+；ZnS：Tb3+；Y2O3：Tb3+；Y2O3：Tb3+，Er3+；ZnS：Mn2+；ZnS：Mn，Er3+At least one of (a).
In addition, in the embodiment of the present invention, the black layer 20 may further include a binder resin, a cross-linking agent, and an auxiliary agent, that is, the black layer 20 is formed by mixing the reflective particles 21 provided with the dye layer 22, the binder resin, the cross-linking agent, and the auxiliary agent. The specific gravities of the adhesive resin, the cross-linking agent and the auxiliary agent can refer to the specific gravities in the related art, and are not described herein again.
In addition, in the embodiment of the present invention, the black layer 20 may be adhered to the backplane body 10 through an adhesive film, and of course, the black layer 20 may also be directly formed on the backplane body 10, which is not limited herein.
In addition, in the embodiment of the present invention, when the black layer 20 includes the reflective particles 21 provided with the dye layer 22, and the organic black dye is coated on the reflective particles 21 to form the dye layer 22, the adhesion between the organic black dye and the backplane body 10 can be further improved.
In addition, in an embodiment of the present invention, the organic black dye includes: at least one of direct black 144, metal complex dye X55, azo pigment B27, aniline black NO.2, perylene black LP32 and perylene black L0086.
In addition, in the embodiment of the present invention, the thickness of the dye layer 22 may be any value from 0.01 micrometers to 0.5 micrometers. At this time, the thickness of the dye layer 22 is small, so that the volume occupied by the light reflecting particles 21 in the black layer 20 is small, thereby allowing as many light reflecting particles 21 as possible in the black layer 20, so that the black color of the black layer 20 is more uniform.
In addition, in the embodiment of the present invention, the particles 21 may include at least one of titanium dioxide, glass powder, and aluminum powder.
When the particles 21 include at least one of titanium dioxide, glass powder and aluminum powder, at this time, the organic black dye is disposed on the particles 21, so that the organic black dye forms a dye layer 22, and light can be reflected by the particles 21 after passing through the dye layer 22, thereby achieving the reflectivity of the back plate of the photovoltaic module. In addition, the titanium dioxide, the glass powder, the aluminum powder and other materials have high light reflectivity and relatively low price, so that the light reflectivity of the photovoltaic module backboard provided by the embodiment of the utility model is improved, the cost of the photovoltaic module provided by the embodiment of the utility model is low, and the market popularization of the photovoltaic module backboard is favorably increased.
In addition, in the embodiment of the present invention, the thickness of the black layer 20 is any value between 5 micrometers and 50 micrometers.
When the thickness of the black layer 20 is any value between 5 micrometers and 50 micrometers, at this time, the thickness of the back sheet of the photovoltaic module can be made smaller, so that the weight of the back sheet of the photovoltaic module is lighter.
It should be noted that, in the embodiment of the present invention, when the thickness of the black layer 20 is any value between 5 micrometers and 50 micrometers, in this case, the thickness of the black layer 20 may be 5 micrometers, may be 50 micrometers, may also be 15 micrometers, and may also be 20 micrometers, and the specific value of the thickness of the black layer 20 is not limited herein.
In addition, in the embodiment of the present invention, the thickness of the black layer 20 may also be other values, for example, the thickness of the black layer 20 is greater than 50 micrometers, or the thickness of the black layer 20 is less than 5 micrometers, which is not limited herein.
Additionally, in embodiments of the present invention, the particle size of particles 21 may be anywhere between 0.5 microns and 2 microns.
When the particle size of the particle 21 is any one of values of 0.5 to 2 μm, it is suitable to form the dye layer 22 on the particle 21, thereby making it possible to form the dye layer 22 on the particle 21 more conveniently. In addition, the particle size of the particles 21 is any value of 0.5 to 2 micrometers, and the particle size of the particles 21 can be smaller, so that more particles 21 can be in the black layer 20, and the black color of the black layer 20 is more uniform after the dye layer 22 is formed on the particles 21.
It should be noted that, when the particle size of the particle 21 is any value between 0.5 micrometers and 2 micrometers, in this case, the particle size of the particle 21 may be 0.5 micrometers, may also be 2 micrometers, and of course, may also be any value greater than 0.5 micrometers and smaller than 2 micrometers. The embodiments of the present invention are not limited herein.
In addition, in the embodiment of the present invention, the particle size of the particle 21 may also be other values, for example, the particle size of the particle 21 is any value greater than 2 micrometers, or any value less than 0.5 micrometers, which is not limited herein.
In addition, in the embodiment of the present invention, the thickness of the first conversion layer 23 may be any value of 0.01 to 0.5 micrometers.
When the thickness of the first conversion layer 23 is any one of values of 0.01 to 0.5 micrometers, at this time, the thickness of the first conversion layer 23 is small, so that the volume of the reflective particles 21 after the first conversion layer 23 is added is small, thereby making as many reflective particles 21 having the dye layer 22 attached thereto as possible in the black layer 20, so that the black color of the black layer 20 is more uniform.
Of course, the thickness of the first conversion layer 23 may also be other values, for example, the thickness of the first conversion layer 23 is 0.6 μm, and the thickness of the first conversion layer 23 is not limited herein.
Note that, in the embodiment of the present invention, when the thickness of the first conversion layer 23 is any one of values of 0.01 to 0.5 micrometers, in this case, the thickness of the first conversion layer 23 may be 0.01 micrometers. It may also be 0.5 micrometer, i.e. the thickness of the first conversion layer 23 comprises both end points of the interval of values. The thickness of the first conversion layer 23 may be 0.1 μm or 0.2 μm.
In addition, in the embodiment of the present invention, as shown in fig. 1, the back sheet body 10 may include a resin layer 11 and a PET layer 12, wherein the resin layer 11 and the PET layer 12 may be stacked, and the PET layer 12 is located between the resin layer 11 and the black layer 20.
The thickness of the resin layer 11 may be any value from 5 micrometers to 50 micrometers, that is, the thickness of the resin layer 11 may be any value from 5 micrometers, 50 micrometers, more than 5 micrometers, and less than 50 micrometers. The thickness of the PET layer 12 may be any value from 140 micrometers to 350 micrometers, that is, the thickness of the PET layer 12 may be any value from 140 micrometers, 350 micrometers, more than 140 micrometers, and less than 350 micrometers. The embodiments of the present invention are not limited herein.
In addition, in the embodiment of the present invention, when the back sheet body 10 includes the resin layer 11 and the PET layer 12, the back sheet of the photovoltaic module is equivalent to have a three-layer structure, i.e., the black layer 20, the PET layer 12 and the resin layer 11.
In addition, in the embodiment of the present invention, the particle 21 may be referred to as a double-layer particle 21, i.e., the particle 21 is coated with two layers of materials, that is, the organic black dye is coated on the particle 21 first, and then the first conversion layer 23 is coated on the organic black dye.
In the embodiment of the present invention, a black layer 20 is disposed on the backplane body 10, the black layer 20 includes an organic black dye and a plurality of reflective particles 21, each particle 21 is coated with the organic black dye, and the organic black dye forms a dye layer 22. The dye layer 22 is provided with a first conversion layer 23, and the first conversion layer 23 is coated on the dye layer 22. Not only can the black layer 20 be difficult for discolouring, but also can improve the performance of the reflection light of the backplate of the photovoltaic module.
An embodiment of the present invention provides a photovoltaic module, which includes the back sheet of the photovoltaic module in any one of the above embodiments.
Referring to fig. 3, a second schematic view of a back sheet of a photovoltaic module according to an embodiment of the present invention is shown; referring to fig. 4, a schematic diagram of a particle with a dye layer thereon is shown according to an embodiment of the present invention. As shown in fig. 3 and 4, the back sheet of the photovoltaic module includes a back sheet body 10, a black layer 20, and a second conversion layer 30, which are stacked.
The black layer 20 includes an organic black dye and a plurality of light-reflecting particles 21, each particle 21 is coated with the organic black dye, and the organic black dye forms a dye layer 22. The second conversion layer 30 is disposed on a surface of the black layer 20 away from the backplane body 10, and the second conversion layer 30 is configured to convert a third wavelength of light into a fourth wavelength, where the third wavelength is smaller than the fourth wavelength.
Because backplate body 10 and black layer 20 range upon range of setting, black layer 20 includes organic black dyestuff and a plurality of granule 21 that reflect light, and the cladding has organic black dyestuff on every granule 21 that reflects light, and organic black dyestuff forms dyestuff layer 22, consequently, be equivalent to organic black dyestuff cladding on the granule 21 that reflects light for organic black dyestuff becomes a whole with the granule 21 that reflects light. Since the reflective particles 21 are not easy to move, after the organic black dye forms the dye layer 22 on the reflective particles 21, the organic black dye is not easy to move due to the effect of the reflective particles 21, thereby avoiding the problem that the organic black dye moves in the black layer 20 to cause the color change of the black layer 20. That is, in the embodiment of the present invention, the organic black dye is formed on the reflective particles 21 to form the dye layer 22 covering the reflective particles 21, so that the reflective particles 21 and the organic black dye are integrated, and the problem that the black layer 20 is discolored due to the movement of the organic black dye in the black layer 20 is avoided, so that the black layer 20 is not easily discolored.
In addition, when the second conversion layer 60 is disposed on the surface of the black layer 20 away from the back plate body 10, and at this time, when the light irradiates the back plate of the photovoltaic module, the light first irradiates the second conversion layer 60, the second conversion layer 60 can convert the light from the third wavelength to the fourth wavelength, that is, from the short wavelength to the long wavelength, and then the light with the long wavelength irradiates on the reflective particles 21 and is reflected by the reflective particles 21. Since the black organic dye mainly absorbs short-wavelength light, in the embodiment of the utility model, the second conversion layer 60 is disposed to convert the light from a single-wavelength short wavelength to a long wavelength by the second conversion layer 60, so that the light absorbed by the black organic dye is reduced, the light reflected by the reflective particles 21 is increased, and the performance of the back plate of the photovoltaic module for reflecting light is improved.
In the embodiment of the present invention, a black layer 20 is disposed on the backplane body 10, the black layer 20 includes an organic black dye and a plurality of reflective particles 21, each particle 21 is coated with the organic black dye, and the organic black dye forms a dye layer 22. A second conversion layer 30 is disposed on the black layer 20, and the second conversion layer 30 is located on the surface of the black layer 20 away from the backplane body 10. Not only can the black layer 20 be difficult for discolouring, but also can improve the performance of the reflection light of the backplate of the photovoltaic module.
In addition, in the embodiment of the present invention, the third wavelength may be a wavelength less than 600 nanometers, and the fourth wavelength may be a wavelength greater than 600 nanometers, and of course, the third wavelength and the fourth wavelength may also be set according to actual needs, and the embodiment of the present invention is not limited herein.
It should be noted that, in the following description,in an embodiment of the present invention, the second conversion layer 60 comprises a conversion material comprising: y is2O3；ZnS；ZnSe；MgS；CaS；Mn，ErZnSe；Mn，ErMgS；Mn，ErCaS；Mn，ErZnS；Mn，YbZnSe；Mn，YbMgS；Mn，YbCaS；Mn，YbZnS：Tb3+，Er3+；ZnS：Tb3+；Y2O3：Tb3+；Y2O3：Tb3+，Er3+；ZnS：Mn2+；ZnS：Mn，Er3+At least one of (a).
In addition, in the embodiment of the present invention, the black layer 20 may further include a binder resin, a cross-linking agent, and an auxiliary agent, that is, the black layer 20 is formed by mixing the reflective particles 21 provided with the dye layer 22, the binder resin, the cross-linking agent, and the auxiliary agent. The specific gravities of the adhesive resin, the cross-linking agent and the auxiliary agent can refer to the specific gravities in the related art, and are not described herein again.
In addition, in the embodiment of the present invention, the black layer 20 may be adhered to the backplane body 10 through an adhesive film, and of course, the black layer 20 may also be directly formed on the backplane body 10, which is not limited herein.
In addition, in the embodiment of the present invention, when the black layer 20 includes the reflective particles 21 provided with the dye layer 22, and the organic black dye is coated on the reflective particles 21 to form the dye layer 22, the adhesion between the organic black dye and the backplane body 10 can be further improved.
In addition, in an embodiment of the present invention, the organic black dye includes: at least one of direct black 144, metal complex dye X55, azo pigment B27, aniline black NO.2, perylene black LP32 and perylene black L0086.
In addition, in the embodiment of the present invention, the thickness of the dye layer 22 may be any value from 0.01 micrometers to 0.5 micrometers. At this time, the thickness of the dye layer 22 is small, so that the volume occupied by the light reflecting particles 21 in the black layer 20 is small, thereby allowing as many light reflecting particles 21 as possible in the black layer 20, so that the black color of the black layer 20 is more uniform.
In addition, in the embodiment of the present invention, the particles 21 may include at least one of titanium dioxide, glass powder, and aluminum powder.
When the particles 21 include at least one of titanium dioxide, glass powder and aluminum powder, at this time, the organic black dye is disposed on the particles 21, so that the organic black dye forms a dye layer 22, and light can be reflected by the particles 21 after passing through the dye layer 22, thereby achieving the reflectivity of the back plate of the photovoltaic module. In addition, the titanium dioxide, the glass powder, the aluminum powder and other materials have high light reflectivity and relatively low price, so that the light reflectivity of the photovoltaic module backboard provided by the embodiment of the utility model is improved, the cost of the photovoltaic module provided by the embodiment of the utility model is low, and the market popularization of the photovoltaic module backboard is favorably increased.
In addition, in the embodiment of the present invention, the thickness of the black layer 20 is any value between 5 micrometers and 50 micrometers.
When the thickness of the black layer 20 is any value between 5 micrometers and 50 micrometers, at this time, the thickness of the back sheet of the photovoltaic module can be made smaller, so that the weight of the back sheet of the photovoltaic module is lighter.
It should be noted that, in the embodiment of the present invention, when the thickness of the black layer 20 is any value between 5 micrometers and 50 micrometers, in this case, the thickness of the black layer 20 may be 5 micrometers, may be 50 micrometers, may also be 15 micrometers, and may also be 20 micrometers, and the specific value of the thickness of the black layer 20 is not limited herein.
In addition, in the embodiment of the present invention, the thickness of the black layer 20 may also be other values, for example, the thickness of the black layer 20 is greater than 50 micrometers, or the thickness of the black layer 20 is less than 5 micrometers, which is not limited herein.
Additionally, in embodiments of the present invention, the particle size of particles 21 may be anywhere between 0.5 microns and 2 microns.
When the particle size of the particle 21 is any one of values of 0.5 to 2 μm, it is suitable to form the dye layer 22 on the particle 21, thereby making it possible to form the dye layer 22 on the particle 21 more conveniently. In addition, the particle size of the particles 21 is any value of 0.5 to 2 micrometers, and the particle size of the particles 21 can be smaller, so that more particles 21 can be in the black layer 20, and the black color of the black layer 20 is more uniform after the dye layer 22 is formed on the particles 21.
It should be noted that, when the particle size of the particle 21 is any value between 0.5 micrometers and 2 micrometers, in this case, the particle size of the particle 21 may be 0.5 micrometers, may also be 2 micrometers, and of course, may also be any value greater than 0.5 micrometers and smaller than 2 micrometers. The embodiments of the present invention are not limited herein.
In addition, in the embodiment of the present invention, the particle size of the particle 21 may also be other values, for example, the particle size of the particle 21 is any value greater than 2 micrometers, or any value less than 0.5 micrometers, which is not limited herein.
In addition, in the embodiment of the present invention, the thickness of the second conversion layer 60 may be any value between 5 micrometers and 50 micrometers.
When the thickness of the second conversion layer 60 is any value between 5 micrometers and 50 micrometers, at this time, the thickness of the back sheet of the photovoltaic module can be made smaller, so that the weight of the back sheet of the photovoltaic module is lighter.
It should be noted that, in the embodiment of the present invention, when the thickness of the second conversion layer 60 is any value between 5 micrometers and 50 micrometers, in this case, the thickness of the second conversion layer 60 may be 5 micrometers, may be 50 micrometers, may also be 15 micrometers, and may also be 20 micrometers, and for the specific value of the thickness of the second conversion layer 60, the embodiment of the present invention is not limited herein.
In addition, in the embodiment of the present invention, the thickness of the second conversion layer 60 may also be other values, for example, the thickness of the second conversion layer 60 is greater than 50 micrometers, or the thickness of the second conversion layer 60 is less than 5 micrometers, which is not limited herein.
In addition, in the embodiment of the present invention, the second conversion layer 60 may further include a bonding resin, a cross-linking agent, and an auxiliary agent, that is, the second conversion layer 60 is made by mixing the conversion material, the bonding resin, the cross-linking agent, and the auxiliary agent. The specific gravities of the adhesive resin, the cross-linking agent and the auxiliary agent can refer to the specific gravities in the related art, and are not described herein again.
In addition, in the embodiment of the present invention, as shown in fig. 3, the back sheet body 10 may include a resin layer 11 and a PET layer 12, wherein the resin layer 11 and the PET layer 12 may be stacked, and the PET layer 12 is located between the resin layer 11 and the black layer 20.
The thickness of the resin layer 11 may be any value from 5 micrometers to 50 micrometers, that is, the thickness of the resin layer 11 may be any value from 5 micrometers, 50 micrometers, more than 5 micrometers, and less than 50 micrometers. The thickness of the PET layer 12 may be any value from 140 micrometers to 350 micrometers, that is, the thickness of the PET layer 12 may be any value from 140 micrometers, 350 micrometers, more than 140 micrometers, and less than 350 micrometers. The embodiments of the present invention are not limited herein.
In addition, in the embodiment of the utility model, when the back sheet body 10 includes the resin layer 11 and the PET layer 12, the back sheet of the photovoltaic module has a four-layer structure, namely, the second conversion layer 30, the black layer 20, the PET layer 12 and the resin layer 11.
In the present invention, the dye layer 22 is formed by coating the outer surface of the particle 21 with a material, that is, by coating the outer surface of the particle 21 with an organic black dye. The second conversion layer 60 is disposed on the surface of the black layer 20 away from the back plate body 10, and the particles 21 can be referred to as single-layer particles 21, i.e. the particles 21 are coated with a layer of material.
In the embodiment of the present invention, a black layer 20 is disposed on the backplane body 10, the black layer 20 includes an organic black dye and a plurality of reflective particles 21, each particle 21 is coated with the organic black dye, and the organic black dye forms a dye layer 22. A second conversion layer 30 is disposed on the black layer 20, and the second conversion layer 30 is located on the surface of the black layer 20 away from the backplane body 10. Not only can the black layer 20 be difficult for discolouring, but also can improve the performance of the reflection light of the backplate of the photovoltaic module.
An embodiment of the present invention provides a photovoltaic module, which includes the back sheet of the photovoltaic module in any one of the above embodiments.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
While alternative embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the true scope of the embodiments of the utility model.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or terminal apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or terminal apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or terminal device comprising the element.
While the technical solutions provided by the present invention have been described in detail, the principles and embodiments of the present invention are described herein by using specific examples, and meanwhile, for a person of ordinary skill in the art, according to the principles and implementation manners of the present invention, changes may be made in the specific embodiments and application ranges.
Claims (10)
1. A backsheet for a photovoltaic module, comprising: the back plate body and the black layer are arranged in a stacked mode;
the black layer comprises organic black dye and a plurality of reflective particles, wherein each particle is coated with the organic black dye, and the organic black dye forms a dye layer;
the light source comprises a dye layer, a first conversion layer and a second conversion layer, wherein the dye layer is provided with the first conversion layer, the first conversion layer is coated on the dye layer, the first conversion layer is used for converting light from a first wavelength into a second wavelength, and the first wavelength is smaller than the second wavelength.
2. The backsheet according to claim 1, wherein the thickness of the first conversion layer is any value from 0.01 to 0.5 μm.
3. The backsheet according to claim 1, wherein the thickness of the dye layer is any value from 0.01 to 0.5 μm.
4. The backsheet for a photovoltaic module according to claim 1, wherein said particles comprise at least one of titanium dioxide, glass powder, aluminum powder.
5. The backsheet according to claim 1, wherein said particles have a size of any value between 0.5 and 2 microns.
6. The back plate of the photovoltaic module is characterized by comprising a back plate body, a black layer and a second conversion layer which are arranged in a stacked mode;
the black layer comprises organic black dye and a plurality of reflective particles, wherein each particle is coated with the organic black dye, and the organic black dye forms a dye layer;
the second conversion layer is arranged on the surface, far away from the backboard body, of the black layer and used for converting a third wavelength of light into a fourth wavelength, and the third wavelength is smaller than the fourth wavelength.
7. The backsheet for a photovoltaic module according to claim 6, characterized in that the thickness of said second conversion layer is any value between 5 and 50 microns.
8. The backsheet for a photovoltaic module according to claim 6, wherein said particles comprise at least one of titanium dioxide, glass powder, aluminum powder.
9. A photovoltaic module comprising the backsheet of the photovoltaic module of any one of claims 1-5.
10. A photovoltaic module comprising the backsheet of the photovoltaic module according to any one of claims 6 to 8.
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| CN202121789983.3U CN216311805U (en) | 2021-08-02 | 2021-08-02 | Photovoltaic module's backplate and photovoltaic module |
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| CN202121789983.3U CN216311805U (en) | 2021-08-02 | 2021-08-02 | Photovoltaic module's backplate and photovoltaic module |
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| CN216311805U true CN216311805U (en) | 2022-04-15 |
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