CN110660877A - Method for eliminating light energy loss of photovoltaic module invalid area and photovoltaic module - Google Patents
Method for eliminating light energy loss of photovoltaic module invalid area and photovoltaic module Download PDFInfo
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- CN110660877A CN110660877A CN201910953330.5A CN201910953330A CN110660877A CN 110660877 A CN110660877 A CN 110660877A CN 201910953330 A CN201910953330 A CN 201910953330A CN 110660877 A CN110660877 A CN 110660877A
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- paraboloid
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- glass panel
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 150000001875 compounds Chemical class 0.000 claims abstract description 53
- 238000003466 welding Methods 0.000 claims abstract description 19
- 239000011521 glass Substances 0.000 claims description 33
- 239000002131 composite material Substances 0.000 claims description 26
- 229910000679 solder Inorganic materials 0.000 claims description 13
- 238000002310 reflectometry Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 abstract description 6
- 230000001681 protective effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
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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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- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a method for eliminating light energy loss of an invalid area of a photovoltaic assembly and the photovoltaic assembly. According to the invention, the compound paraboloid at the position of the main grid line of the cell can reduce the optical energy loss of the partial area, and the width of the main grid line can be properly increased or the number of the main grid lines can be adjusted to reduce the electric energy loss caused by welding strips in the photovoltaic module.
Description
Technical Field
The invention relates to a method for eliminating light energy loss of an invalid area of a photovoltaic module and the photovoltaic module, and belongs to the technical field of photovoltaics.
Background
The photovoltaic module generally includes a cell for photoelectric conversion, and a glass panel and a back plate for encapsulating the cell, the glass panel is located above the cell, the back plate is located below the cell, a solder strip for collecting current is further disposed on the cell, the solder strip is located on the main grid line, and the solder strip is located between the cell and the glass panel.
The welding strip is an important raw material in the welding process of the photovoltaic module, is positioned at the position of the main grid line and is used for connecting the cell and the cell, and the collection efficiency of the current of the photovoltaic module is directly influenced by the quality of the welding strip, so that the power of the photovoltaic module is greatly influenced. The photovoltaic solder strip is applied to connection between the photovoltaic module cells and plays an important role in electric conduction. In the production of photovoltaic modules, in order to improve the efficiency of photovoltaic modules, the loss of light energy is generally reduced by reducing the width of the main grid lines and by adopting the appropriate number of the main grid lines. The light collection rate is improved by reflecting part of light rays at the main grating line position by adopting the welding strip with a circular or triangular cross section, so that part of light loss is reduced.
However, this method can only be applied to the main grid line position, and cannot play a role in reducing the light energy loss for the cell array gaps and the ineffective edges. Moreover, the reflectivity is low due to the high light absorptivity of the metal reflecting surface of the welding strip, the reflecting surface is easy to damage in the welding process, and the manufacturing cost is increased.
Disclosure of Invention
In order to overcome the above technical problems, the present invention provides a method for eliminating light energy loss in an inactive area of a photovoltaic module and a photovoltaic module.
According to one object of the invention, the invention provides the following technical scheme:
a method for eliminating optical energy loss of an invalid area of a photovoltaic assembly is characterized in that a composite paraboloid is arranged on a glass panel of the photovoltaic assembly, the composite paraboloid is arranged at a position, corresponding to a main grid line on a battery piece, on the glass panel and at a position, corresponding to a splicing gap and an invalid edge of a battery piece array, and light rays passing through the composite paraboloid are reflected to the valid area of the battery piece so as to eliminate optical energy loss of the main grid line, the splicing gap and the invalid edge of the battery piece, and the composite paraboloid is a total reflection or mirror reflection composite paraboloid.
Furthermore, a compound parabolic welding strip for collecting current is further arranged on the main grid line of the battery piece.
Further, the compound paraboloid at the splicing gap of the cell array is made of an insulating and high-reflectivity material.
Further, a boss, a paraboloid or a compound paraboloid with a triangular section is adopted on the glass panel at the cell array gap or the ineffective edge of the photovoltaic module to reduce the light energy loss of the ineffective edge.
Further, the convex part of the compound paraboloid protrudes to one side of the battery piece.
According to another object of the invention, the invention provides the following technical scheme:
the photovoltaic module comprises a cell, a glass panel and a back plate, wherein the glass panel is located above the cell, the back plate is located below the cell, a welding strip used for collecting current is further arranged on a main grid line on the cell, the main grid line or the welding strip is located between the cell and the glass panel, a compound paraboloid is arranged on the glass panel, the compound paraboloid is arranged at a position corresponding to the main grid line and a position corresponding to an invalid edge of a cell array splicing gap, and the compound paraboloid is a total reflection or mirror reflection compound paraboloid.
Furthermore, a composite parabolic welding strip for collecting current is arranged on the main grid line, and the composite parabolic welding strip is a total reflection or mirror reflection composite parabolic surface.
Further, the compound paraboloid at the splicing gap of the cell array is made of an insulating and high-reflectivity material.
Further, a boss, a paraboloid or a compound paraboloid with a triangular section are adopted at the invalid edge.
Further, the convex part of the compound paraboloid protrudes to one side of the battery piece.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the method for eliminating the light energy loss of the ineffective area of the photovoltaic assembly, the composite paraboloid structure is arranged at the position of the main grid line of the cell corresponding to the protective glass panel of the photovoltaic assembly and at the position corresponding to the splicing gap and the ineffective edge of the cell array, so that the light energy loss of the main grid line, the splicing gap and the ineffective edge of the cell is eliminated, and the part of light rays of the ineffective area which is newly increased can be collected by the cell through the composite paraboloid. Meanwhile, the width of a main grid line can be properly increased, the sectional area of a welding strip is increased, and the resistance of a lead is reduced, so that the electric energy loss caused by the welding strip in the photovoltaic module is reduced.
2. According to the method for eliminating the light energy loss of the photovoltaic module invalid area, the light collection range is expanded to the whole receiving surface of the photovoltaic module and then converged to the effective area of the cell array, the compound paraboloid adopted on the protective glass panel collects the light rays of the invalid area in a mirror reflection or total reflection mode, and the light collection rate is far higher than that of a triangular solder strip in the splicing technology. The composite paraboloid can reduce the absorption of stray light by using the edge ray principle, and is beneficial to reducing the dark current generated by the photoelectric effect of the cell.
Drawings
FIG. 1 is a longitudinal partial cross-sectional view of a glass panel of a photovoltaic module according to the present invention.
Fig. 2 is a light path diagram of a composite paraboloid of the splicing gap and the ineffective edge of the cell piece.
FIG. 3 is a schematic view of the reflection of light from the glass panel of the photovoltaic module through the compound parabolic reflector according to the present invention.
In the figure, 1-glass panel, 2-compound paraboloid at main grid line, 3-compound paraboloid at longitudinal gap, 4-critical light, 5-incident light, 6-transverse gap compound paraboloid emission light path, and 7-cell main grid line compound paraboloid light path.
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example 1
A method for eliminating optical energy loss of an invalid area of a photovoltaic assembly is characterized in that a composite paraboloid is arranged on a glass panel of the photovoltaic assembly, the composite paraboloid is arranged at a position, corresponding to a main grid line on a battery piece, on the glass panel and at a position, corresponding to a splicing gap and an invalid edge of the battery piece array, of the glass panel, a protruding part of the composite paraboloid protrudes towards one side of the battery piece, light rays passing through the composite paraboloid are reflected to the valid area of the battery piece, so that optical energy loss of the main grid line, the splicing gap and the invalid edge of the battery piece is eliminated, and the composite paraboloid is a total reflection or mirror reflection composite paraboloid. Bosses, paraboloids or compound paraboloids with triangular sections are adopted at the gaps of the cell arrays or the ineffective edges of the photovoltaic modules on the glass panel to reduce the light energy loss of the ineffective edges.
Example 2
The difference between the embodiment and the embodiment 1 is that a compound parabolic solder strip for collecting current is further arranged on the main grid line of the cell, the compound parabolic solder strip reduces the loss of light energy, and the compound parabolic solder strip is a total reflection or mirror reflection compound parabolic surface. The compound paraboloid at the splicing gap of the cell array is made of insulating and high-reflectivity materials.
Example 3
As shown in figure 1 of the drawings, in which,
the utility model provides an eliminate photovoltaic module of invalid region light energy loss, includes battery piece, glass panels 1 and backplate, and glass panels 1 is located the top of battery piece, and the backplate is located the below of battery piece still is provided with the solder strip that is used for gathering the electric current on the main grid line of battery piece, main grid line or solder strip be located the battery piece with between the glass panels, set up compound parabolic on the glass panels, compound parabolic setting is in the position that corresponds with main grid line and the battery piece array concatenation clearance and the position department that the invalid edge corresponds, including compound parabolic 2 and the compound parabolic 3 of longitudinal gap department in main grid line department. The convex part of the compound paraboloid protrudes towards one side of the battery piece. The compound paraboloid is a total reflection or mirror reflection compound paraboloid, and the compound paraboloid welding strip is a total reflection or mirror reflection compound paraboloid. The invalid edge is made of a boss, a paraboloid or a compound paraboloid with a triangular section, and the compound paraboloid at the splicing gap of the cell array is made of an insulating and high-reflectivity material.
Example 4
As shown in figures 2 and 3 of the drawings,
two incident lights 5 incident to the middle are critical lights 4, the two light rays incident to the middle are critical lights 4, as shown in fig. 3, the transverse gap compound parabolic emission light path 6 and the cell main grid line compound parabolic light path 7, the incident angles are smaller than or equal to the angles of the connecting light rays and the cell normal lines, all the light rays larger than the critical light rays 4 and the cell normal line angles are not absorbed as stray light, and the critical light rays 4 of the compound parabolic light converge at the edge of the other compound parabolic light path.
According to the invention, the composite paraboloid structure is arranged at the positions of the main grid lines of the cell corresponding to the photovoltaic module protective glass panel and at the positions corresponding to the splicing gaps and the invalid edges of the cell array, so that the light energy loss of the main grid lines, the splicing gaps and the invalid edges of the cell is eliminated, and the part of light rays of the newly increased invalid area can be collected by the cell through the composite paraboloid. Meanwhile, the width of the main grid line can be properly increased, the sectional area is increased, and the resistance of the lead is reduced, so that the electric energy loss caused by a welding strip in the photovoltaic module is reduced.
The light collection range is expanded to the whole receiving surface of the photovoltaic module and then converged to the effective area of the cell array, the compound paraboloid adopted on the protective glass panel collects light rays in the ineffective area in a mirror reflection or total reflection mode, and the light collection rate is far greater than that of a triangular welding strip in the splicing technology. The composite paraboloid can reduce the absorption of stray light by using the edge ray principle, and is beneficial to reducing the dark current generated by the photoelectric effect of the cell.
In the above embodiment, the parallel light parallel to the optical axis in the compound paraboloid converges at the focus of the parabola. By adjusting the rotation of the parabola to make its focus on another parabola which is symmetrical (marginal ray principle). And all the light rays within the angle adjusting range are collected, and all the light rays larger than the angle adjusting range are used as stray light and are not absorbed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The method for eliminating the light energy loss of the ineffective area of the photovoltaic module is characterized in that a composite paraboloid is arranged on a glass panel of the photovoltaic module, the composite paraboloid is arranged at the position, corresponding to a main grid line on a cell piece, on the glass panel and at the position, corresponding to a splicing gap and an ineffective edge of a cell piece array, of the glass panel, light rays passing through the composite paraboloid are reflected to the effective area of the cell piece so as to eliminate the light energy loss of the main grid line, the splicing gap and the ineffective edge of the cell piece, and the composite paraboloid is a total reflection or mirror reflection composite paraboloid.
2. The method of claim 1, wherein a compound parabolic solder strip for collecting current is further disposed on the cell segment busbar.
3. The method of claim 1, wherein the compound paraboloid at the splicing gap of the cell array is made of an insulating and high-reflectivity material.
4. The method of claim 1, wherein a triangular boss, paraboloid or compound paraboloid is used on the glass panel at the cell array gap or the dead edge of the photovoltaic module to reduce the loss of light energy at the dead edge.
5. The method of claim 1, wherein the convex portion of the compound paraboloid is convex to one side of the cell.
6. The photovoltaic module is characterized by comprising a battery piece, a glass panel and a back plate, wherein the glass panel is located above the battery piece, the back plate is located below the battery piece, a welding strip used for collecting current is further arranged on a main grid line on the battery piece, the main grid line or the welding strip is located between the battery piece and the glass panel, a compound paraboloid is arranged on the glass panel, the compound paraboloid is arranged at a position corresponding to the main grid line and a position corresponding to a splicing gap and an invalid edge of the battery piece array, and the compound paraboloid is a total reflection or mirror reflection compound paraboloid.
7. The photovoltaic module for eliminating the light energy loss of the ineffective area according to claim 6, characterized in that a compound parabolic solder strip for collecting the current is further arranged on the main grid line, and the compound parabolic solder strip is a total reflection or mirror reflection compound parabolic surface.
8. The photovoltaic module of claim 6, wherein the compound paraboloid at the splicing gap of the cell array is made of an insulating and high-reflectivity material.
9. The photovoltaic module of claim 6, wherein the inactive edge is a triangular boss, a paraboloid or a compound paraboloid.
10. The photovoltaic module of claim 6, wherein the convex portion of the compound paraboloid protrudes toward one side of the cell.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910953330.5A CN110660877A (en) | 2019-10-09 | 2019-10-09 | Method for eliminating light energy loss of photovoltaic module invalid area and photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910953330.5A CN110660877A (en) | 2019-10-09 | 2019-10-09 | Method for eliminating light energy loss of photovoltaic module invalid area and photovoltaic module |
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| CN110660877A true CN110660877A (en) | 2020-01-07 |
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| CN201910953330.5A Pending CN110660877A (en) | 2019-10-09 | 2019-10-09 | Method for eliminating light energy loss of photovoltaic module invalid area and photovoltaic module |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076857A (en) * | 1990-08-27 | 1991-12-31 | Spire Corporation | Photovoltaic cell and process |
| US5554229A (en) * | 1995-02-21 | 1996-09-10 | United Solar Systems Corporation | Light directing element for photovoltaic device and method of manufacture |
| CN103400881A (en) * | 2013-07-09 | 2013-11-20 | 赛维Ldk太阳能高科技（南昌）有限公司 | Photovoltaic component packaging method and photovoltaic component |
| US20130306134A1 (en) * | 2012-05-15 | 2013-11-21 | Panasonic Corporation | Solar cell module and manufacturing method of the same |
| CN203895475U (en) * | 2014-04-28 | 2014-10-22 | 润峰电力有限公司 | High efficiency building element module |
| JP2017137233A (en) * | 2016-01-21 | 2017-08-10 | ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ | Manufacturing method of glass ceramic material exhibiting slight scattering light ratio and preferably having no coloring and glass ceramic material manufactured by the method and use thereof |
-
2019
- 2019-10-09 CN CN201910953330.5A patent/CN110660877A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076857A (en) * | 1990-08-27 | 1991-12-31 | Spire Corporation | Photovoltaic cell and process |
| US5554229A (en) * | 1995-02-21 | 1996-09-10 | United Solar Systems Corporation | Light directing element for photovoltaic device and method of manufacture |
| US20130306134A1 (en) * | 2012-05-15 | 2013-11-21 | Panasonic Corporation | Solar cell module and manufacturing method of the same |
| CN103400881A (en) * | 2013-07-09 | 2013-11-20 | 赛维Ldk太阳能高科技（南昌）有限公司 | Photovoltaic component packaging method and photovoltaic component |
| CN203895475U (en) * | 2014-04-28 | 2014-10-22 | 润峰电力有限公司 | High efficiency building element module |
| JP2017137233A (en) * | 2016-01-21 | 2017-08-10 | ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ | Manufacturing method of glass ceramic material exhibiting slight scattering light ratio and preferably having no coloring and glass ceramic material manufactured by the method and use thereof |
Non-Patent Citations (2)
| Title |
|---|
| 中国科学技术情报研究所重庆分所编辑: "《新能源文摘 第2辑》", 31 August 1985, 科学技术文献出版社；重庆分社 * |
| 日本太阳能学会编，刘鉴民等译: "《太阳能的基础和应用》", 31 May 1982, 上海科学技术出版社 * |
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