CN209912884U - Double-faced dual-glass assembly capable of improving back power generation - Google Patents
Double-faced dual-glass assembly capable of improving back power generation Download PDFInfo
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- CN209912884U CN209912884U CN201822202382.2U CN201822202382U CN209912884U CN 209912884 U CN209912884 U CN 209912884U CN 201822202382 U CN201822202382 U CN 201822202382U CN 209912884 U CN209912884 U CN 209912884U
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- photovoltaic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
The utility model provides an improve two-sided dual glass assembly of back electricity generation, include: the photovoltaic power generation system comprises photovoltaic back plate glass, a back adhesive, a plurality of rows of power generation units, a front adhesive and photovoltaic cover plate glass which are arranged from bottom to top, wherein part or all of the edges of the photovoltaic back plate glass and the photovoltaic cover plate glass are of a planar structure; the front adhesive adopts high-transparency ethylene-vinyl acetate copolymer EVA or POE, and the back adhesive adopts white EVA or POE. The back adhesive is connected with the middle part by adopting a positioning adhesive tape or a sawtooth shape, and materials are bonded together to form a sealing body after the assembly is laminated and cured. The utility model discloses increase from positive transmitted light and then promote the reverberation at the back, adopt the high transmission material in regional edge to increase the transmitted light, the adhesive uses sectional type/concatenation formula production, plays the edge, is mainly the high transmission effect of side, in industrial production, can rise the utilization of back light, promotes back generated energy.
Description
Technical Field
The utility model relates to a photovoltaic power generation technical field, in particular to improve two-sided dual glass assembly of back electricity generation.
Background
At present, the photoelectric conversion efficiency of the back surface of the double-sided double-glass component is 65% -90% of that of the front surface, and the gain of the system power generation power after system integration is about 4% -30% compared with that of the traditional single-sided component power station. However, subject to ground conditions and investment (single or dual axis tracking systems). How to further promote the advantages of the double-sided component is an important problem in front of investors of the photovoltaic power station.
The patent application No. 201810047939.1 discloses a double-sided solar cell module capable of improving the power generation capacity, which comprises a cover plate (generally glass), a packaging material, a cell string, a packaging material and a back plate which are sequentially arranged from top to bottom. It has the disadvantages that: the grid-shaped structure realizes high reflection at the gaps of the battery pieces; however, alignment is not easily controlled in practice due to the expansion and contraction of the adhesive at the high temperatures of the laminator. If the width of the high-reflection material at the gap is widened, the light transmission effect of the back surface can be reduced, and the light absorption of the back surface is further reduced. The method needs to consider the adhesion condition of the high-reflectivity material and the cell glass, and does not pollute the cell. The latticed back sheet is not yet commercially produced.
The patent (application number 201620380809.6) adopts a non-working area to absorb heat generated by a component working chamber by using a phase-change material, so that the temperature of the component is reduced, and the efficiency and the power generation capacity of the solar cell are improved. It has the disadvantages that: large-scale commercial application of phase change materials is not easy to implement and the need is subject to rigorous reliability validation.
The double-glass assembly is installed on the water surface in the patent (application number is 201710653911.8), the reflector panel is placed at the rear, and the surface light absorption of the double-glass assembly is increased by utilizing the characteristic of high water surface reflectivity (10-20%), so that the generated energy is improved. It also has the disadvantages that: the mode of lengthening the lower part of the component, such as carrying a metal plate or a white backboard, is adopted as a light reflecting surface, so that the installation place is limited, and the outdoor long-term reliability factors such as wind resistance of newly-added components need to be considered.
In general, when the back surface of the double-sided module is painted, the power generation gains of the back surface are 10%, 12%, 13% and 32%, respectively. Because photovoltaic power plant avoids the hot spot effect that shelters from etc. and cause at the design process, the subassembly array distance is relatively far away, and the front reflection of light is difficult directly to reflect to the back of the preceding row of subassembly and utilize, and the back is the series connection structure in addition, and the electric current that leads to is increased to the local light of the simple front reflection of leaning on is limited.
SUMMERY OF THE UTILITY MODEL
The purpose of the present invention is to solve at least one of the technical drawbacks.
Therefore, the utility model aims to provide an improve two-sided dual glass assembly of back electricity generation.
In order to realize the above-mentioned purpose, the embodiment of the utility model provides an improve two-sided dual glass assembly of back electricity generation, include: the photovoltaic power generation system comprises photovoltaic back plate glass, a back adhesive, a plurality of rows of power generation units, a front adhesive and photovoltaic cover plate glass which are arranged from bottom to top, wherein the middle areas of the photovoltaic back plate glass and the photovoltaic cover plate glass are designed in an embossing mode, and the edges of the photovoltaic back plate glass and the photovoltaic cover plate glass are partially or completely of a planar structure; wherein, the front adhesive adopts high-permeability ethylene-vinyl acetate copolymer EVA or POE, and the back adhesive adopts white EVA or POE; the back adhesive is connected with the middle part by adopting a positioning adhesive tape or a sawtooth shape, and materials are bonded together to form a sealing body after the assembly is laminated and cured.
Further, the thickness of the antireflection film of the back plate glass for photovoltaic and the thickness of the antireflection film of the cover plate glass for photovoltaic are different.
Further, the antireflection film of the cover plate glass for the photovoltaic is an AR antireflection film with the wavelength of 123 +/-2 nm; the antireflection film of the back plate glass for the photovoltaic adopts a 125-135nm antireflection film.
Furthermore, the passivation layer film on the back of the multiple rows of power generation units is a silicon nitride film, the thickness of the film is 88-92nm, and the refractive index is 2.10 +/-0.03.
Furthermore, the multiple rows of power generation units adopt crystalline silicon batteries.
Furthermore, the back adhesive and the front adhesive adopt a splicing mode, wherein the middle area is made of high-reflection materials, and the edge area is made of high-transmission materials.
Furthermore, a high-transmittance EVA (ethylene vinyl acetate) strip or a POE (polyolefin elastomer) strip with the width of 1-1.5cm is adopted at the position of the back adhesive close to the edge of the glass.
According to the utility model discloses improve two-sided dual glass assembly of back electricity generation, except increasing the regional reflectivity of electricity generation central authorities openly, reduce the regional reflectivity of non-electricity generation edge, the transmitted light that increases the part openly is by diffuse reflection on ground, can promote the light absorption at the back. The utility model discloses increase from positive transmitted light and then promote the reverberation at the back, adopt regional marginal high transmission material to increase the transmitted light, reduce packaging material bonding material edge reflectivity. And the glass with a slightly thicker back coating is adopted according to the back reflection light characteristic, and meanwhile, the thickness parameter of the passivation layer on the back of the battery can be properly thickened and adjusted to achieve a better light absorption effect on the back. Furthermore, the utility model discloses an adhesive uses sectional type/concatenation formula production, plays the effect of the high transmission of edge (mainly be the side), and easy industrial production can promote the utilization of back light, promotes back generated energy.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a structural view of a dual-sided dual glass assembly according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a dual-sided dual glass assembly according to an embodiment of the present invention;
fig. 3 is a schematic view of an adhesive according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1-3, the utility model discloses improve two-sided dual glass assembly of back electricity generation, include: the photovoltaic back plate glass 1, the back adhesive 3, the multiple rows of power generation units 2, the front adhesive 3 and the photovoltaic cover plate glass 4 are arranged from bottom to top.
Specifically, the middle areas of the photovoltaic back plate glass 1 and the photovoltaic cover plate glass 4 are designed in an embossing mode, and the edges of the photovoltaic back plate glass 1 and the photovoltaic cover plate glass 4 are partially or completely of a plane structure, so that the transmittance of the edge non-power generation area is increased, more light is reflected on the ground, and the light utilization of the back side is increased. The photovoltaic back sheet glass 1 and the photovoltaic cover sheet glass 4 do not have embossed design in the four edge regions, and the light transmittance at the edges is increased.
In an embodiment of the present invention, the antireflection film of the back plate glass 1 for photovoltaic and the cover plate glass 4 for photovoltaic use adopt an inconsistent antireflection coating process. The thicknesses of the antireflection films of the photovoltaic back plate glass 1 and the photovoltaic cover plate glass 4 are different according to the requirement of the back mounting site.
Preferably, the peak wavelength λ of the front surface acceptance is about 680nm, and the AR antireflection film with the wavelength of 123 +/-2 nm is adopted for the glass coating film. The 125-135nm antireflection film with thicker film thickness can be selected for better back absorption due to the influence of environmental factors on the back.
In the utility model discloses in, front adhesive 3 adopts high permeable ethylene-vinyl acetate copolymer EVA or POE (Polyolyalthaolfin polyethylene octene elastomer altogether), and back adhesive 3 adopts white EVA or POE. The back adhesive 3 is bonded to the middle portion by using a positioning tape or by using a saw-toothed structure, and the materials are bonded together to form a sealing body after the assembly is laminated and cured. In one embodiment of the present invention, the position of the back adhesive 3 near the edge of the glass is a high-transmittance EVA strip or POE strip with a width of 1-1.5 cm.
The utility model discloses in, back adhesive 3 and front adhesive 3 adopt the concatenation formula mode, are mainly near the marginal round adhesive 3 of glass and adopt the three segmentation modes. It should be noted that the splicing manner may be various manners such as sticking, tape binding, etc., and only the splicing is satisfied, which is not described herein again. The adhesive material interface does not necessarily take the form of a straight line.
The back adhesive 3 material can be formed by splicing two materials. The middle area is made of high-reflection materials, the edge non-power generation area is made of high-transmission materials, particularly a layer on the back face is formed, and part of high-reflection parts are integrated in the assembly.
In the embodiment of the present invention, the front adhesive 3 and the back adhesive 3 may be ethylene-vinyl acetate copolymer EVA or POE plastic.
Meanwhile, the thickness parameter of the passivation layer film on the back of the battery can be properly thickened and adjusted to achieve a good light absorption effect on the back. The passivation layer film at the back of the multiple rows of generating units 2 in the utility model adopts a silicon nitride film, the film thickness is 88-92nm, and the refractive index is 2.10 +/-0.03. Among them, the multiple rows of power generation units 2 may be crystalline silicon cells.
According to the utility model discloses improve two-sided dual glass assembly of back electricity generation, except increasing the regional reflectivity of electricity generation central authorities openly, reduce the regional reflectivity of non-electricity generation edge, the transmitted light that increases the part openly is by diffuse reflection on ground, can promote the light absorption at the back. The utility model discloses increase from positive transmitted light and then promote the reverberation at the back, adopt regional marginal high transmission material to increase the transmitted light, reduce packaging material bonding material edge reflectivity. And the glass with a slightly thicker back coating is adopted according to the back reflection light characteristic, and meanwhile, the thickness parameter of the passivation layer on the back of the battery can be properly thickened and adjusted to achieve a better light absorption effect on the back. Furthermore, the utility model discloses an adhesive uses sectional type/concatenation formula production, plays the effect of the high transmission of edge (mainly be the side), and easy industrial production can promote the utilization of back light, promotes back generated energy.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides an improve two-sided dual glass assembly of back electricity generation which characterized in that includes: the photovoltaic back plate glass, the back adhesive, the multiple rows of power generation units, the adhesive for the front side and the photovoltaic cover plate glass are arranged from bottom to top, wherein the middle areas of the photovoltaic back plate glass and the photovoltaic cover plate glass are designed in an embossing mode, and the four edge areas of the photovoltaic back plate glass and the photovoltaic cover plate glass are not designed in an embossing mode, so that the light transmittance of the edges is increased; the edges of the photovoltaic back plate glass and the photovoltaic cover plate glass are partially or completely of a plane structure; wherein, the front adhesive adopts high-permeability ethylene-vinyl acetate copolymer EVA or POE, and the back adhesive adopts white EVA or POE; the back adhesive is connected with the middle part by adopting a positioning adhesive tape for bonding or adopting a sawtooth shape for connecting, and materials are bonded together to form a sealing body after the assembly is laminated and cured; the antireflection film of the cover plate glass for the photovoltaic adopts an AR antireflection film with the thickness of 123 +/-2 nm; the antireflection film of the back plate glass for the photovoltaic adopts a 125-135nm antireflection film; the back adhesive and the front adhesive are spliced, wherein the middle area is made of high-reflection materials, the edge area is made of high-transmission materials, and part of high-reflection parts are integrated in the assembly through one layer of the back.
2. The dual-glass assembly for improving power generation at the back side of claim 1, wherein the antireflection film of the back plate glass for photovoltaic and the antireflection film of the cover glass for photovoltaic have different thicknesses.
3. The double-sided double-glass assembly for improving power generation on the back side of claim 1, wherein a passivation layer film on the back side of the multiple rows of power generation units is a silicon nitride film, the thickness of the passivation layer film is 88-92nm, and the refractive index is 2.10 +/-0.03.
4. The double-sided dual glass assembly for improving power generation at the back side of claim 1 or 3, wherein the multiple rows of power generation units are crystalline silicon cells.
5. The dual-sided dual-glass assembly with improved power generation on the back side of claim 1, wherein the back side adhesive is provided with high-transmittance EVA strips or POE strips with the width of 1-1.5cm at the position close to the glass edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822202382.2U CN209912884U (en) | 2018-12-26 | 2018-12-26 | Double-faced dual-glass assembly capable of improving back power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822202382.2U CN209912884U (en) | 2018-12-26 | 2018-12-26 | Double-faced dual-glass assembly capable of improving back power generation |
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| Publication Number | Publication Date |
|---|---|
| CN209912884U true CN209912884U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822202382.2U Expired - Fee Related CN209912884U (en) | 2018-12-26 | 2018-12-26 | Double-faced dual-glass assembly capable of improving back power generation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509804A (en) * | 2018-12-26 | 2019-03-22 | 保定光为绿色能源科技有限公司 | A kind of two-sided solar double-glass assemblies improving back side power generation |
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2018
- 2018-12-26 CN CN201822202382.2U patent/CN209912884U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509804A (en) * | 2018-12-26 | 2019-03-22 | 保定光为绿色能源科技有限公司 | A kind of two-sided solar double-glass assemblies improving back side power generation |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200107 Termination date: 20211226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |