CN111613683B - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
- Publication number
- CN111613683B CN111613683B CN202010605937.7A CN202010605937A CN111613683B CN 111613683 B CN111613683 B CN 111613683B CN 202010605937 A CN202010605937 A CN 202010605937A CN 111613683 B CN111613683 B CN 111613683B
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- Prior art keywords
- photovoltaic module
- bus bar
- battery string
- photovoltaic
- glass plate
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- 239000011521 glass Substances 0.000 claims abstract description 73
- 238000003466 welding Methods 0.000 claims description 8
- 238000010248 power generation Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 description 5
- 239000005022 packaging material Substances 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 235000012431 wafers Nutrition 0.000 description 4
- 239000002313 adhesive film Substances 0.000 description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 229920006124 polyolefin elastomer Polymers 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- 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
- H01L31/048—Encapsulation of modules
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- 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
-
- 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
Abstract
The invention discloses a photovoltaic module, wherein photovoltaic glass comprises a glass plate, one surface of the glass plate is provided with a groove, and a first bus bar and an insulating bar are arranged in the groove; the photovoltaic module comprises the photovoltaic glass, the photovoltaic glass is a front glass plate, and the front glass plate comprises a first surface provided with an AR anti-reflection film and a second surface which is a suede surface; the arrangement structure of the cell pieces of the photovoltaic module is as follows: the photovoltaic module comprises L battery string groups, each battery string group comprises M battery strings, each battery string group comprises N multi-piece batteries, each battery string group is provided with a second bus bar connected in parallel to a first bus bar and a third bus bar led out of the photovoltaic module and connected with the junction box, each third bus bar comprises a positive terminal and a negative terminal, and the first bus bar is arranged between the two battery strings or outside the battery strings. Compared with the prior art, the photovoltaic module and the manufacturing method thereof have the advantages that the cost is saved, the production efficiency is improved, and the power generation efficiency of the photovoltaic module is also improved.
Description
Technical Field
The invention relates to the technical field of solar power generation equipment, in particular to a photovoltaic module.
Background
Photovoltaic power generation is a power generation technology that directly converts solar energy into electrical energy by using the photovoltaic effect of a semiconductor interface. At present, photovoltaic power generation has received wide attention from countries all over the world and has developed into a new emerging industry. The photovoltaic module is formed by connecting and tightly packaging a plurality of single solar cells in series and in parallel, and is a photovoltaic cell combination device which can realize minimum inseparable photovoltaic power generation, however, the cells of the general photovoltaic module are singly welded and series welded through welding tapes, the front electrode of the front cell is connected with the back electrode of the back cell and is heated and welded together, by analogy, the cells of one cell are connected in series to form a cell string, then the welded cell string is typeset and welded with a first bus bar, the leading-out end of the first bus bar is connected in series with bypass diodes and the like in a junction box, the positive electrode and the negative electrode are led out, and finally the photovoltaic module is formed through a series of module manufacturing processes.
The single-glass photovoltaic module generally adopts a sandwich structure of glass/packaging material/battery piece/packaging material/back plate, and a frame is additionally arranged on the periphery of the single-glass photovoltaic module to ensure the mechanical property of the module and facilitate installation. The double-glass photovoltaic module adopts a sandwich structure of glass/packaging material/cell piece/packaging material/glass, no frame is additionally arranged around the double-glass photovoltaic module, wherein the glass is generally toughened photovoltaic glass, the packaging material is packaging adhesive films such as EVA (ethylene vinyl acetate), POE (polyolefin elastomer), PVB (polyvinyl butyral) and the like, and the cell piece is a single crystal or polycrystalline cell piece.
Conventional photovoltaic modules are typically in a series circuit configuration of 60P type (6 strings × 10 sheets) or 72P type (6 strings × 12 sheets). With the development of half-slice and multi-slice technologies, a 120P version (6 strings × 10 half-slices × 2) or 144P version (6 strings × 12 half-slices × 2) series-parallel circuit structure is developed. However, with the industrialization of large-size silicon wafers of 210mm and the like, limited by the limitation of the maximum size of the module, the circuit layout structure of the conventional module cannot be compatible with the large-size silicon wafers, and for the large-size silicon wafers of not less than 210mm, a 150P type (5 strings × 15 three-piece × 2) series-parallel circuit structure is proposed in the industry, as shown in fig. 3 and 5, due to the limitation of the positive and negative electrode layout of the battery pieces, the odd number of strings of the photovoltaic module will inevitably have two strings of battery pieces with the same positive and negative electrode arrangement, so that when the photovoltaic module is installed, a placement area of a first bus bar must be reserved to connect the positive and negative electrodes of the two strings of battery pieces in series, but the area and the weight of the module are increased by presetting the first bus bar area, the power generation efficiency of the module is reduced, the transportation and installation costs of the module are increased, and the difficulty of the module manufacturing process is increased, affecting the production efficiency and the yield of the product.
Disclosure of Invention
The invention provides a photovoltaic module, which solves the problems of increased cost, lower production efficiency and the like caused by the fact that a first bus bar installation area needs to be reserved when the photovoltaic module in the prior art is installed.
The technical scheme adopted by the invention is as follows: the photovoltaic glass comprises a glass plate and a first bus bar arranged in the glass plate, wherein the first bus bar comprises a welding end exposed out of the surface of the glass plate.
Furthermore, one side of the glass plate is provided with a strip-shaped groove, the first bus bar is embedded in the groove, and two ends of the first bus bar are exposed out of the groove.
Further, the glass plate further includes an insulating bar embedded in the groove to confine the first bus bar within the groove.
A photovoltaic module comprises the photovoltaic glass.
Further, the arrangement structure of the cell pieces of the photovoltaic module is as follows: l battery string groups, each battery string group includes M battery strings, and every battery string includes a plurality of burst of N, M of M battery string is the odd number, the N of a plurality of bursts of N is non-0's natural number, L of L battery string groups is 2.
Further, the arrangement structure of the cell pieces of the photovoltaic module is as follows: 2 battery string groups, each battery string group comprises 5 columns of battery strings, and each column of battery strings comprises 16 multi-slices.
Further, the photovoltaic glass is the preceding glass board of photovoltaic module, preceding glass board is including locating the outer first surface of photovoltaic module, the first surface is equipped with AR subtracts anti-membrane.
Further, the photovoltaic glass also comprises a second surface opposite to the first surface, and the second surface is a textured surface.
Furthermore, each battery string group is provided with a second bus bar for connecting the battery pieces in the battery string group in series, the second bus bars are connected to the first bus bar in parallel, and the first bus bar is led out of the photovoltaic module through a third bus bar.
Further, photovoltaic module still includes the back of the body glass board, the back of the body glass board is equipped with the through-hole, the third busbar includes through the through-hole draw forth in the outer positive, negative terminal of photovoltaic module.
Further, the first bus bar is arranged between two adjacent columns of the battery strings.
Further, the first bus bars are arranged on the outer sides of the battery strings in the outermost rows in parallel.
Compared with the prior art, the photovoltaic glass is integrated with the first bus bar, so that the photovoltaic glass can be directly installed without reserving the position of the first bus bar in a series-parallel circuit structure with odd number of strings such as 150P type (5 strings multiplied by 15 three segments multiplied by 2), and the like, thereby saving the cost and improving the production efficiency; the interval between the cell strings can be reduced, so that the area of a photovoltaic module made of the photovoltaic glass is smaller, and the power generation efficiency of the photovoltaic module is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic cross-sectional view of a photovoltaic glass according to the present invention;
FIG. 2 is a schematic cross-sectional view of a photovoltaic module according to the present invention;
FIG. 3 is a schematic diagram showing a mounting structure of a prior art primary bus bar of the first embodiment;
fig. 4 is a schematic diagram of the mounting structure of the primary bus bar in the present aspect of the first embodiment;
fig. 5 is a schematic diagram showing a mounting structure of a prior art primary bus bar of the second embodiment;
fig. 6 is a schematic view of the mounting structure of the primary bus bar in the present embodiment of the second embodiment.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides photovoltaic glass, as shown in fig. 1, the photovoltaic glass comprises a glass plate 1, a groove is formed in the glass plate 1, a first bus bar 2 is embedded in the groove, two ends of the first bus bar 2 are welding ends, an insulating bar 3 is further arranged at a notch of the groove, the insulating bar 3 seals the notch of the groove to fix a main body of the first bus bar 2 in the glass plate 1, meanwhile, two welding ends of the first bus bar 2 are exposed out of the surface of the glass plate 1, and the insulating bar has the insulating characteristic. The two ends of the first bus bar 2 can be connected with different circuit structures respectively, so that the two bus bars can be conveniently connected in series or in parallel, the position of a reserved wiring or bus bar is not needed, and the purposes of convenience in installation and space saving are achieved.
The photovoltaic glass is mainly used in photovoltaic modules, in particular to a photovoltaic module with a module circuit structure of M-string multiplied by N multi-segment multiplied by L in the prior art, wherein M is an odd number, generally 5, N is a natural number which is not 0, generally 10, 12 and 15, and L is a natural number which is not 0, generally 2; the battery pieces in the embodiment are sliced battery pieces, and are generally 1/2 pieces, 1/3 pieces, 1/4 pieces, 1/5 pieces and the like.
Preferably, the invention is described by taking a 150P version (5 strings × 15 three segments × 2) for a large-size silicon wafer module of 210mm and the like, that is, an arrangement structure of cells of a photovoltaic module includes 2 cell string groups, each cell string group includes 5 columns of cell strings, and each column of cell strings includes a photovoltaic module of a 16-multi-segment series-parallel circuit structure as an example.
In the photovoltaic module of this type, as shown in fig. 2, the photovoltaic glass proposed in the present invention is used as a front glass plate of the photovoltaic module, the first bus bar 2 is integrated on the front glass plate, two welding ends of the first bus bar 2 are disposed towards an assembly surface of the front glass plate and the battery string group 8, the lower end of the battery piece is a back glass plate 4, the light transmittance of the back glass plate 4 is generally required to be equal to or greater than 88%, 3 through holes 41 are distributed on a position of the back glass plate 4 where the junction box is mounted, the through holes 41 are disposed at intervals in the middle position of the back glass plate 4, positive and negative electrodes of the photovoltaic module extend out from the through holes 41 to be electrically connected with the junction box, the aperture of the through holes 41 is determined according to the size of the wiring, the position of the through holes is determined according to the layout design of the battery string group, and the size and the thickness of the front and back glass plates can be designed according to requirements.
And the packaging adhesive films 5 are arranged among the front glass plate, the battery string group 8 and the back glass plate 4, when the assembly is laminated, the packaging adhesive films 5 can be melted at high temperature to generate a cross-linking reaction, so that the effect of packaging and protecting the battery piece is achieved, and the photovoltaic assembly is finally formed through a series of assembly manufacturing processes.
The photovoltaic module comprises two battery string groups, the two battery string groups are distributed in a mirror-image up-down symmetrical mode, the general type of the structure can refer to the prior art disclosed in the patent with the application number of 201621230989.6, the description of the application is omitted, the battery string group above the photovoltaic module is provided with a second bus bar 6 at the uppermost end, and the second bus bar 6 is used for connecting all the battery pieces in the battery string group in series; similarly, a second bus bar 6 is also arranged at the lowest end of the lower battery string group, and the second bus bar 6 connects the battery pieces in the lower battery string group in series; a third bus bar 7 is further arranged between the upper cell group and the lower cell group, the third bus bar 7 is led out of the photovoltaic module through the back glass plate 4 and mainly comprises a positive electrode and a negative electrode, and the third bus bar 7 is connected with bypass diodes and the like in the junction box in series through the positive electrode and the negative electrode to form a module circuit structure.
In the present application, the two welding terminals of the first bus bar 2 are respectively connected to the upper and lower two second bus bars 6, and one of the welding terminals of the first bus bar 2 is also connected to the third bus bar 7, so that the upper and lower battery strings are connected in parallel to the first bus bar 2 and connected to the junction box through the third bus bar 7.
As shown in fig. 3, in the prior art in the first embodiment, the first bus bar 2 is disposed on the outermost side in the row-to-row distribution direction of the battery strings, that is, on the outer side of the battery string in the outermost row, and the first bus bar 2 is disposed substantially in parallel with each row of the battery strings; as shown in fig. 4, the first bus bar 2 in the present embodiment in the first embodiment is integrally provided in the front glass plate.
As shown in fig. 5, in the prior art in the second embodiment, the first bus bars 2 in this embodiment are arranged in parallel between a row of battery strings and an adjacent row of battery strings; as shown in fig. 6, the first bus bar 2 of the present embodiment in the second embodiment is integrally provided in the front glass plate
As can be seen from the above, in the prior art, a region with a certain width needs to be reserved in the same parallel position as the battery string group to mount the first bus bar 2, generally, the region does not interfere with other internal structures, and the area of the region is relatively large; in the first embodiment or the second embodiment, due to the design of the scheme, the first bus bar 2 is integrally arranged in the front glass plate, so that the reserved space can be omitted, the front glass plate can be directly installed, the cost is saved, the production efficiency is improved, and meanwhile, due to the arrangement of the insulating bar 3, the safety of the circuit structure is greatly improved.
Simultaneously, according to photovoltaic module efficiency promotion formula: η = Pm/(S1-S2) -Pm/S1 (where Pm is the module output power; S1 is the module area; S2 is the reserved first bus bar 2 placement area): the smaller the area of the first bus bar 2 placement region is, the higher the power generation efficiency of the photovoltaic module is, and therefore the power generation efficiency of the photovoltaic module can be obviously improved.
Preferably, the thickness of the photovoltaic glass is 2.0mm/2.5mm/3.2 mm; the width of the first bus bar 2 is 4 mm-10 mm, the thickness thereof is 0.4 mm-0.8 mm, the thickness of the insulating bar 3 is 0.4 mm-0.8 mm, and the length and the width thereof are consistent with the first bus bar 2. The arrangement is convenient for the integral installation of the photovoltaic module, and the structural stability of the photovoltaic glass is easy to maintain.
Preferably, the photovoltaic glass adopted in the photovoltaic module is generally traditional photovoltaic toughened glass or semi-toughened glass, the front glass plate comprises a first surface irradiated by sunlight, and the first surface is provided with a layer of AR antireflection film, so that sunlight reflection can be reduced; the front glass plate also comprises a second surface facing the battery string group, the second surface is a microstructure with a suede surface and has an anti-reflection effect on sunlight, and therefore the light transmittance of the front glass plate is enabled to be larger than or equal to 91%.
Preferably, the insulating strip 3 of the present invention is made of EVA, and is embedded with the first bus bar 2 in the photovoltaic glass to form an integrated design.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A photovoltaic module is characterized by comprising a glass plate, a first bus bar arranged in the glass plate, wherein the first bus bar comprises a welding end exposed out of the surface of the glass plate; the arrangement structure of the cell pieces of the photovoltaic module is as follows: l battery string groups, every battery string group includes M battery string, and every battery string includes a plurality of burst of N, M of M battery string is the odd number, the N of a plurality of burst of N is the natural number of non 0, L of L battery string group is 2, 2 the battery string group is mirror image vertical symmetry and distributes, every the battery string group be equipped with the second busbar of each battery piece series connection in the battery string group, each the second busbar parallel connection is in on the first busbar, two welded ends of first busbar are connected upper and lower two second busbars respectively, and one of them welded end of first busbar still connects the third busbar, makes upper and lower battery string group connect in parallel in the first busbar and draw forth outside the photovoltaic module through the third busbar.
2. The photovoltaic module according to claim 1, wherein the arrangement of the cells of the photovoltaic module is as follows: 2 battery string groups, each battery string group comprises 5 columns of battery strings, and each column of battery strings comprises 16 multi-slices.
3. The photovoltaic module of claim 1, wherein the photovoltaic glass is a front glass plate of the photovoltaic module, the front glass plate comprises a first surface disposed outside the photovoltaic module, and the first surface is provided with an AR antireflection film.
4. The photovoltaic module of claim 3, wherein the photovoltaic glass further comprises a second surface opposite the first surface, the second surface being textured.
5. The assembly according to claim 1, further comprising a back glass plate having a through hole, wherein the third bus bar comprises positive and negative terminals leading out of the assembly through the through hole.
6. The photovoltaic module of claim 1, wherein the first bus bar is disposed between two adjacent columns of cell strings.
7. The photovoltaic module of claim 1, wherein the first bus bars are disposed in parallel outside the cell strings of the outermost columns.
8. The photovoltaic module according to claim 1, wherein one surface of the glass plate is provided with a strip-shaped groove, the first bus bar is embedded in the groove, and both ends of the first bus bar are exposed to the groove.
9. The photovoltaic assembly of claim 8, wherein the glass sheet further comprises an insulating strip embedded within the groove to confine the first bus bar within the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010605937.7A CN111613683B (en) | 2020-06-29 | 2020-06-29 | Photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010605937.7A CN111613683B (en) | 2020-06-29 | 2020-06-29 | Photovoltaic module |
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| Publication Number | Publication Date |
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| CN111613683A CN111613683A (en) | 2020-09-01 |
| CN111613683B true CN111613683B (en) | 2021-08-20 |
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| CN202010605937.7A Active CN111613683B (en) | 2020-06-29 | 2020-06-29 | Photovoltaic module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394307A (en) * | 2021-06-11 | 2021-09-14 | 东方日升新能源股份有限公司 | Dark photovoltaic module and manufacturing process thereof |
| CN215646722U (en) * | 2021-06-29 | 2022-01-25 | 泰州隆基乐叶光伏科技有限公司 | Photovoltaic module |
| CN113659025B (en) * | 2021-07-22 | 2023-08-11 | 横店集团东磁股份有限公司 | Photovoltaic module arrangement structure and implementation method thereof |
| CN113644153A (en) * | 2021-08-13 | 2021-11-12 | 上海晶澳太阳能科技有限公司 | Photovoltaic module and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100065105A1 (en) * | 2008-09-12 | 2010-03-18 | Francois Andre Koran | Thin Film Photovoltaic Module Having a Contoured Substrate |
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| CN102412314A (en) * | 2011-12-02 | 2012-04-11 | 福莱特光伏玻璃集团股份有限公司 | Weatherproof antireflective coated glass used for packaging solar battery |
| CN102637760A (en) * | 2012-03-16 | 2012-08-15 | 常州天合光能有限公司 | Double-glass photovoltaic module with back glass being separated |
| CN105405905A (en) * | 2014-09-03 | 2016-03-16 | 英属开曼群岛商精曜有限公司 | Solar module |
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| CN111613683A (en) | 2020-09-01 |
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