CN210379076U - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
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- CN210379076U CN210379076U CN201921722052.4U CN201921722052U CN210379076U CN 210379076 U CN210379076 U CN 210379076U CN 201921722052 U CN201921722052 U CN 201921722052U CN 210379076 U CN210379076 U CN 210379076U
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- photovoltaic module
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- back plate
- sided battery
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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
- Y02E10/52—PV systems with concentrators
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Abstract
The utility model provides a photovoltaic module, it includes: the light-reflecting double-sided battery comprises a cover plate, a first packaging layer, a plurality of double-sided battery pieces, a second packaging layer and a transparent acrylic back plate, wherein light-reflecting structures corresponding to gaps among the double-sided battery pieces are arranged on the inner surface of the back plate so as to reflect light rays onto the double-sided battery pieces. The photovoltaic module of the utility model is designed into the transparent acrylic back plate, thereby avoiding the PID problem of the photovoltaic module; in addition, a light reflecting structure is arranged at the gap between the double-sided battery pieces, so that light rays irradiated to the back plate from the gap are reflected, the utilization rate of the light rays in the gap is improved, and the photoelectric conversion efficiency of the photovoltaic module is improved.
Description
Technical Field
The utility model relates to a photovoltaic cell production field especially relates to a photovoltaic module.
Background
With the progress of the photovoltaic industry, the double-sided module has become a new product which is popular, and the power of the photovoltaic module is greatly improved because the back module can generate electricity by utilizing ground reflected light. However, the Potential Induced Degradation (PID) problem of the bifacial module has always plagued manufacturers of photovoltaic modules. The PID is a characteristic of the photovoltaic cell panel, and means that under a high-temperature and high-humidity environment, a high voltage flowing through the solar cell unit may cause a decrease in output. PID is related to environmental factors, component materials, and inverter array grounding scheme.
The existing solutions are generally: the original EVA (Ethylene-vinyl Acetate Copolymer) encapsulating layer of the photovoltaic module is replaced by a POE (polyolefin elastomer) encapsulating layer, but the POE material has the following characteristics: firstly, the light transmittance of the POE material is lower than that of EVA, and the power of the module is relatively lower; secondly, the POE material has high fluidity, the problems of sheet combination, bubbles and the like easily occur in the manufacturing process, and the high requirement on a laminating machine causes that part of production lines cannot be produced in mass; moreover, the POE laminating time is long, so that the yield and the productivity of the double-sided assembly are inferior to those of a double-layer EVA double-glass assembly; in addition, POE price is higher than EVA for two-sided subassembly cost is higher.
In addition, the two-sided subassembly of current volume production adopts the glass of white glaze plating in the clearance position between the battery piece as the backplate to promote clearance light utilization ratio, increase photovoltaic module's power, but because the glass material surface is difficult for making high reflectivity structure, consequently subassembly power gain is less.
Therefore, it is necessary to design a photovoltaic module to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a photovoltaic module that anti PID and photoelectric conversion efficiency are higher.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a photovoltaic module, comprising: the solar cell comprises a cover plate, a first packaging layer, a plurality of double-sided battery pieces, a second packaging layer and a transparent acrylic back plate, wherein light reflecting structures corresponding to gaps among the double-sided battery pieces are arranged on the inner surface of the back plate of each battery piece so as to reflect light rays onto the double-sided battery pieces.
As a further improved technical scheme of the utility model, light reflecting structure is hemispherical.
As a further improved technical scheme of the utility model, the reflecting structure is pyramid-shaped.
As a further improved technical scheme of the utility model, the surface of reflecting structure is equipped with white and the opaque reflection of light coating.
As a further improved technical proposal of the utility model, the reflective coating is a fluorine coating or a ceramic coating. As a further improved technical solution of the present invention, the light transmittance of the back plate is 93% to 95%.
As a further improved technical scheme of the utility model, first encapsulated layer with the second encapsulated layer is the EVA glued membrane.
As a further improved technical scheme of the utility model, the light reflecting structure with backplate integrated into one piece.
As a further improved technical scheme of the utility model, the width of light reflecting structure is less than the width in clearance.
According to the technical scheme, the photovoltaic module of the utility model is designed into the transparent acrylic back plate, so that the PID problem of the photovoltaic module is avoided; in addition, a light reflecting structure is arranged at the gap between the double-sided battery pieces, so that light rays irradiated to the back plate from the gap are reflected, the utilization rate of the light rays in the gap is improved, and the photoelectric conversion efficiency of the photovoltaic module is improved.
Drawings
Fig. 1 is a schematic view of the photovoltaic module of the present invention.
FIG. 2 is a schematic view of another embodiment of a backing plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the present invention provides a photovoltaic module 100, which includes a cover plate 1, a first packaging layer 2, a plurality of double-sided battery pieces 3, a second packaging layer 4 and a back plate 5. The cover plate 1 is a glass cover plate.
The utility model discloses in, backplate 5's material is transparent ya keli, and its luminousness is higher than ordinary backplate glass's luminousness (93%), can reach 95% up to further promote two-sided subassembly back power, generally can improve 2% with two-sided rate. In addition, the material of backplate 5 is become transparent ya keli material by ordinary glass, can stop the separation out of sodion from the source on the one hand to avoid PID to produce, on the other hand, make photovoltaic module 100's weight reduce, can reduce the weight that the specification is 72 photovoltaic module of piece 5 to 6 kilograms under the general condition, consequently, can reduce the bearing weight that photovoltaic module bore the support on producing the line, reduce system cost, practice thrift photovoltaic module's logistics cost simultaneously.
The double-sided battery pieces 3 are arranged in an array, and a light reflecting structure 51 is arranged at a gap between every two adjacent double-sided battery pieces 3 and used for reflecting light rays irradiated onto the back plate 5 through the gap between every two adjacent double-sided battery pieces 3. The reflective structure 51 is specifically disposed on the inner surface of the back plate 5 at a position corresponding to the gap, and the reflective structure 51 is preferably hemispherical. Referring to fig. 2, in another embodiment of the back plate 5 ', the light reflecting structure 51' is arranged in a pyramid shape to perform the same function. Since the acrylic is easily formed at a high temperature, the light reflecting structure 51 can be formed on the upper surface of the back plate 5 at a position corresponding to the gap in the forming stage of the back plate 5 by pressing, and therefore, the light reflecting structure 51 and the back plate 5 are integrally formed.
Further, a reflective coating (not shown) is sprayed on the surface of the reflective structure 51, and is white and opaque, so as to further increase the reflective effect of the reflective structure 51. The light-reflecting coating is preferably a fluorine coating or a ceramic coating, and the fluorine coating can be a Polytetrafluoroethylene (PTFE) coating, a Polychlorotrifluoroethylene (PCTFE) coating or a polyvinylidene fluoride (PVDF) coating. By the arrangement, the front power of the photovoltaic module 100 is greatly improved, and compared with the existing photovoltaic module adopting the glazed glass as the back plate, the front power is 0.5% -0.8% higher. In addition, to ensure that the back power of the photovoltaic module 100 is not affected by the reflective structure 51, the width of the reflective structure 51 is smaller than the width of the gap.
The first packaging layer 2 and the second packaging layer 4 are made of EVA adhesive films. The EVA adhesive film has high transparency, and light rays can easily pass through the EVA adhesive film, so that the light utilization rate of the photovoltaic module is not influenced; the adhesive force is high and is not influenced by humidity; in addition, the EVA adhesive film also has the characteristics of high temperature resistance, moisture resistance, ultraviolet ray resistance and the like, so that the EVA adhesive film is easy to store.
When the photovoltaic module 100 works, light passes through the upper transparent cover plate 1, further pass the transparent first packaging layer 2, some light shines on the double-sided battery piece 3, and convert light energy into electric energy by the double-sided battery piece 3, another part light shines on the reflecting structure 51 through the clearance between the double-sided battery piece 3 after, some light reflects and apron 1 lower surface reflection through reflecting structure 51 in proper order, finally shine on the double-sided battery piece 3, convert light energy into electric energy by the double-sided battery piece 3, therefore, the photovoltaic module 100 can convert the light energy of above-mentioned two parts light into electric energy, clearance light utilization ratio has been promoted, thereby the photoelectric conversion efficiency of the photovoltaic module 100 has been increased.
In summary, the photovoltaic module of the present invention, by designing the back plate as the transparent acrylic back plate, on one hand, avoids the PID problem of the photovoltaic module, and on the other hand, reduces the overall weight of the photovoltaic module, and reduces the bearing weight of the upper bracket of the production line, thereby reducing the production cost and the transportation cost; in addition, a light reflecting structure is arranged at the gap between the double-sided battery pieces to reflect light irradiated onto the back plate through the gap, so that the gap light utilization rate is improved, and the photoelectric conversion efficiency of the photovoltaic module is increased.
Terms such as "upper", "lower", and the like, used herein to denote relative spatial positions, are used herein for ease of description to describe one feature's relationship to another feature as illustrated in the figures. It will be understood that the spatially relative positional terms may be intended to encompass different orientations than those shown in the figures depending on the product presentation position and should not be construed as limiting the claims.
In addition, the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the present invention in detail with reference to the above embodiments, the person of ordinary skill in the art should understand that the person of ordinary skill in the art can still modify the present invention or substitute the same, and all the technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.
Claims (9)
1. A photovoltaic module, comprising: the light-reflecting double-sided battery comprises a cover plate, a first packaging layer, a plurality of double-sided battery pieces, a second packaging layer and a transparent acrylic back plate, wherein light-reflecting structures corresponding to gaps among the double-sided battery pieces are arranged on the inner surface of the back plate so as to reflect light rays onto the double-sided battery pieces.
2. The photovoltaic module of claim 1, wherein: the light reflecting structure is hemispherical.
3. The photovoltaic module of claim 1, wherein: the light reflecting structure is pyramid-shaped.
4. The photovoltaic module of claim 1, wherein: the surface of the light reflecting structure is provided with a white and lightproof light reflecting coating.
5. The photovoltaic module of claim 4, wherein: the reflective coating is a fluorine coating or a ceramic coating.
6. The photovoltaic module of claim 1, wherein: the back plate is an acrylic back plate with the light transmittance of 93-95%.
7. The photovoltaic module of claim 1, wherein: the first packaging layer and the second packaging layer are EVA adhesive films.
8. The photovoltaic module of claim 1, wherein: the light reflecting structure and the back plate are integrally formed.
9. The photovoltaic module of claim 1, wherein: the width of the light reflecting structure is smaller than the width of the gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921722052.4U CN210379076U (en) | 2019-10-15 | 2019-10-15 | Photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921722052.4U CN210379076U (en) | 2019-10-15 | 2019-10-15 | Photovoltaic module |
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| Publication Number | Publication Date |
|---|---|
| CN210379076U true CN210379076U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921722052.4U Active CN210379076U (en) | 2019-10-15 | 2019-10-15 | Photovoltaic module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117476792A (en) * | 2023-11-16 | 2024-01-30 | 丽瀑光能（常熟）有限公司 | Crystalline silicon photovoltaic module |
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2019
- 2019-10-15 CN CN201921722052.4U patent/CN210379076U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117476792A (en) * | 2023-11-16 | 2024-01-30 | 丽瀑光能（常熟）有限公司 | Crystalline silicon photovoltaic module |
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