CN212209505U - Photovoltaic module suitable for solar cell - Google Patents
Photovoltaic module suitable for solar cell Download PDFInfo
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- CN212209505U CN212209505U CN202020786481.4U CN202020786481U CN212209505U CN 212209505 U CN212209505 U CN 212209505U CN 202020786481 U CN202020786481 U CN 202020786481U CN 212209505 U CN212209505 U CN 212209505U
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- 238000003466 welding Methods 0.000 claims description 324
- 238000005520 cutting process Methods 0.000 claims description 32
- 239000011521 glass Substances 0.000 claims description 30
- 230000004888 barrier function Effects 0.000 claims description 20
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 6
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 4
- 229910001152 Bi alloy Inorganic materials 0.000 claims description 3
- 229910000846 In alloy Inorganic materials 0.000 claims description 3
- QCEUXSAXTBNJGO-UHFFFAOYSA-N [Ag].[Sn] Chemical compound [Ag].[Sn] QCEUXSAXTBNJGO-UHFFFAOYSA-N 0.000 claims description 3
- HSGAUFABPUECSS-UHFFFAOYSA-N [Ag][Cu][Sn][Bi] Chemical compound [Ag][Cu][Sn][Bi] HSGAUFABPUECSS-UHFFFAOYSA-N 0.000 claims description 3
- ZWFRZGJUJSOHGL-UHFFFAOYSA-N [Bi].[Cu].[Sn] Chemical compound [Bi].[Cu].[Sn] ZWFRZGJUJSOHGL-UHFFFAOYSA-N 0.000 claims description 3
- KHZAWAWPXXNLGB-UHFFFAOYSA-N [Bi].[Pb].[Sn] Chemical compound [Bi].[Pb].[Sn] KHZAWAWPXXNLGB-UHFFFAOYSA-N 0.000 claims description 3
- PQIJHIWFHSVPMH-UHFFFAOYSA-N [Cu].[Ag].[Sn] Chemical compound [Cu].[Ag].[Sn] PQIJHIWFHSVPMH-UHFFFAOYSA-N 0.000 claims description 3
- LBFKBYSVICSFQW-UHFFFAOYSA-N [In][Sn][Pb][Bi] Chemical compound [In][Sn][Pb][Bi] LBFKBYSVICSFQW-UHFFFAOYSA-N 0.000 claims description 3
- OLXNZDBHNLWCNK-UHFFFAOYSA-N [Pb].[Sn].[Ag] Chemical compound [Pb].[Sn].[Ag] OLXNZDBHNLWCNK-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910001174 tin-lead alloy Inorganic materials 0.000 claims description 3
- 229910000969 tin-silver-copper Inorganic materials 0.000 claims description 3
- 238000005219 brazing Methods 0.000 claims 1
- 229910000679 solder Inorganic materials 0.000 abstract description 133
- 238000004519 manufacturing process Methods 0.000 abstract description 67
- 230000005611 electricity Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 87
- 238000005516 engineering process Methods 0.000 description 15
- 239000003292 glue Substances 0.000 description 6
- 239000011159 matrix material Substances 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
- 238000000034 method Methods 0.000 description 3
- 239000002313 adhesive film Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
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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
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
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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
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- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
The present application provides a photovoltaic module suitable for use in a solar cell. The photovoltaic module in this application makes solder strip main grid and solder strip size obtain more excellent collocation combination through the design and the selection to solder strip and main grid quantity, has effectively increased the collection ability of grid line to the electric current, has reduced resistive loss and shading loss, obtains more excellent optics and electricity utilization ratio to the subassembly power of the battery of having optimized many sizes, and reduced photovoltaic module's manufacturing cost.
Description
Technical Field
The application belongs to the technical field of solar energy, and particularly relates to a photovoltaic module suitable for a solar cell.
Background
The conventional common solar module generally comprises a whole cell or a half cell which is cut into halves by laser, wherein the size of the cell is 156 × 156 mm. A plurality of battery pieces are connected in series or in series-parallel to form a circuit. With the continuous promotion of the market demand on high-power components, under the condition that the promotion effect of the existing battery technology is gradually limited, the area of a silicon wafer is increased, and a large silicon wafer is introduced, so that the shortcut for rapidly promoting the power and the efficiency of the components is gradually formed. However, after the silicon wafer is enlarged in size, the cell efficiency is reduced because various photoelectric losses are theoretically increased when the cell is prepared. Meanwhile, various high-efficiency photovoltaic technologies are diversified, and typically, a multi-main-grid cell assembly, a half-cutting assembly for cutting a cell slice, a stack assembly for cutting the cell slice into a plurality of small slices are adopted, and a technology called parallel slice welding connected through a welding strip is also becoming common.
However, the highest cell efficiency achieved by the design does not mean that the optimum power achieved by the design of the mating components. Because the solder strip shading and resistance of the component, and the component layout design also have an impact on the component power. Taking the increase of the number of the main grids as an example, according to a resistance calculation formula, the increase of the number of the main grids can reduce the resistance of the solder strip, but the shading area can also be increased, so that the increase of the number of the main grids can be irrevocably realized. In the sliced cell assembly, if the current is reduced by half after the cell slice is cut into halves, the resistance loss caused by the welding strip affects 1/4 that the cell slice becomes a whole slice. In contrast, the shading loss caused by the solder strip affects the occupied proportion to be increased, so that the design suitable for the size of the whole solder strip and the number of the main grids is not suitable for a half-wafer assembly any more. Similarly, assuming the cell pieces were cut into 3 parts, the current became 1/3, and the resistance loss became 1/9 as a whole piece. This means that the resistive losses account for a further reduction in the package losses of the component, while the relative proportion of shading losses of the solder strips increases. The more the battery piece is cut, the lower the current is, which means that the power loss caused by the resistance of the welding strip of the assembly is smaller and smaller, and the proportion of the shading loss of the welding strip is relatively larger.
Therefore, as the size of the silicon chip becomes larger and various overlay techniques are applied, the number of main gates and the size of the solder strips need to be redesigned. More laminated sheets and combined sheets are cut aiming at half-sheet and whole solar cell sheets, the number of the required main grids and the size of the solder strip are different, and the corresponding process technological requirements are also different. Therefore, for the improvement of the cell process, the corresponding design of the assembly is needed, so that the efficient cell ultimately forms the efficient photovoltaic assembly.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the photovoltaic module suitable for the solar cell is provided, and through the design and selection of the number of the welding strips and the main grids, the efficiency of the large-size solar cell photovoltaic module is optimized, and the production cost is reduced.
Therefore, the application provides a photovoltaic module suitable for a solar cell, which comprises an upper glass, a front film, a solar cell sheet layer, a rear film and a back barrier plate which are sequentially stacked from top to bottom and are subjected to lamination; the solar cell module comprises an upper glass, a front film, a solar cell sheet layer, a rear film and a back barrier plate, wherein the upper glass, the front film, the solar cell sheet layer, the rear film and the back barrier plate are bonded together to form a module body; the solar cell sheet layer is formed by connecting a plurality of cut small cells in series and/or in parallel, the small cells are connected through welding strips, the welding strips are welded on main grids of the small cells, the number of the welding strips is equal to that of the main grids of the small cells, and each small cell is a small cell formed by cutting a cell piece with the side length size range of 160-220mm by 3-10 equal parts; each small cell has 5-22 main grids; and the maximum width of the cross section of the welding strip is 0.2-0.5 mm.
Optionally, the cross-section of the solder strip may be circular, triangular, elliptical, semicircular or saw-toothed.
Optionally, the solder strip is a braze strip; and the surface of the welding strip is plated with tin-lead alloy, tin-silver alloy, tin-lead-silver alloy, tin-silver-copper alloy, tin-lead-bismuth alloy, tin-bismuth-copper alloy, tin-bismuth-silver-copper alloy or tin-lead-bismuth-indium alloy.
Optionally, the thickness of the front film and the thickness of the back film are controlled as follows: the height of the solder strip is added by 0.1 to 0.3 mm.
Optionally, each small cell is one of the small pieces cut by the cell pieces 3 with the side length of 160-170mm in an equal part manner; and the number of the main grids is 5-15.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 4-7; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 5-8; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 5-9; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 6-9; or the maximum width of the cross section of the welding strip is 0.27 mm-0.23 mm, and the number of the main grids is 7-11.
Optionally, the maximum width of the cross section of the solder strip is 0.4mm, and the number of the main grids is 7; or the maximum width of the cross section of the welding strip is 0.35mm, and the number of the main grids is 8; or the maximum width of the cross section of the welding strip is 0.32mm, and the number of the main grids is 9; or the maximum width of the cross section of the welding strip is 0.29mm, and the number of the main grids is 9; or the maximum width of the cross section of the welding strip is 0.25mm, and the number of the main grids is 11.
Optionally, each small cell is one of the small pieces cut by the equal division of the cell pieces 3 with the side length of 170 and 185 mm; and the number of the main gates is 4-18.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 4-8; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 5-9; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.27 mm-0.23 mm, and the number of the main grids is 8-12.
Optionally, each small battery is one of small pieces formed by equally cutting battery pieces 3 with the side length of 185 mm-200 mm; and the number of the main gates is 6-20.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip is 0.27 mm-0.23 mm, and the number of the main grids is 9-14.
Optionally, each small cell is one of the small pieces cut by the cell pieces 3 with the side length of 200 and 220mm in equal parts; and the number of the main gates is 7-22.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 8-13; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 9-14; or the maximum width of the cross section of the welding strip is 0.27 mm-0.23 mm, and the number of the main grids is 11-16.
Optionally, each small cell is one of the small cells which are cut by equally dividing the cell slice 3 with the side length of 200 and 210 mm; and the number of the main gates is 8-22.
Optionally, the maximum width of the cross section of the welding strip is 0.4mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip is 0.35mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip is 0.32mm, and the number of the main grids is 13; or the maximum width of the cross section of the welding strip is 0.29mm, and the number of the main grids is 14; or the maximum width of the cross section of the welding strip is 0.25mm, and the number of the main grids is 16.
Optionally, each small cell is one of the small cells which are cut by equally dividing the cell sheet 4 with the side length of 200 and 220 mm; and the number of the main gates is 7-20.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip is 0.27 mm-0.23 mm, and the number of the main grids is 9-14.
Optionally, each small battery is one of small pieces formed by equally cutting battery pieces 5 with the side length of 200-220 mm; and the number of the main gates is 7-19.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 5-9; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip is 0.33 mm-0.28 mm, and the number of the main grids is 6-11; or the maximum width of the cross section of the welding strip is 0.28 mm-0.24 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip is 0.24 mm-0.2 mm, and the number of the main grids is 8-14.
Optionally, each small cell is one of the small pieces cut by the cell piece 5 with the side length of 200 and 210mm in an equal part manner; and the number of the main gates is 7-19.
Optionally, the maximum width of the cross section of the welding strip is 0.4mm, and the number of the main grids is 9; or the maximum width of the cross section of the welding strip is 0.35mm, and the number of the main grids is 10; or the maximum width of the cross section of the welding strip is 0.3mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip is 0.25mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip is 0.22mm, and the number of the main grids is 14.
Optionally, each small cell is one of the small cells cut by the cell sheet 6 with the side length of 200 and 220mm in equal parts; and the number of the main gates is 6-19.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 6-9; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.27 mm-0.24 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.24 mm-0.2 mm, and the number of the main grids is 8-12.
The application also provides a photovoltaic module suitable for the solar cell, which comprises upper glass, a front film, a solar cell sheet layer, a rear film and a back barrier plate which are sequentially stacked from top to bottom and are laminated, wherein the upper glass, the front film, the solar cell sheet layer, the rear film and the back barrier plate are bonded together to form a module body, the upper glass is coated glass and is a light receiving surface, and the back barrier plate is back plate polymer or glass; the solar cell sheet layer is formed by connecting a plurality of solar cells in series and/or in parallel; the side length size range of each solar cell is 160-220 mm; each solar cell is a whole piece or a small piece cut by 2-10 equal parts of the whole piece; each solar cell slice is formed by connecting solder strips in series and/or in parallel; the welding strips are welded on the main grids of the solar cell, and the number of the welding strips is equal to that of the main grids of the solar cell; each solar cell slice is provided with 6-30 main grids; the cross section of the welding strip is circular, triangular, elliptical, semicircular or zigzag, the maximum width of the cross section of the welding strip is 0.2-0.6mm, and the larger the size of the welding strip is, the smaller the number of the main grids is.
Optionally, the thickness of the front film and the thickness of the back film are controlled as follows: the height of the solder strip is added by 0.1 to 0.3 mm.
Optionally, the solar cell is a whole piece with the side length of 160 mm-170 mm; the number of the main grids is 6-25; and the maximum width of the cross section of the welding strip is 0.3mm-0.6 mm.
Optionally, the maximum width of the cross section of the welding strip is 0.6-0.53 mm, and the number of the main grids is 7-10; or the maximum width of the cross section of the welding strip is 0.53 mm-0.48 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.48-0.43 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip is 0.43-0.38 mm, and the number of the main grids is 10-14; or the maximum width of the cross section of the welding strip is 0.38 mm-0.34 mm, and the number of the main grids is 12-17; or the maximum width of the cross section of the welding strip is 0.34 mm-0.30 mm, and the number of the main grids is 13-19.
Optionally, the solar cell sheet is a whole sheet with side length of 166 mm; the number of the main grids is 6-25; and the maximum width of the cross section of the welding strip is 0.3mm-0.6 mm.
Optionally, the maximum width of the cross section of the solder strip is 0.55mm, and the number of the main grids is 10; or the maximum width of the cross section of the welding strip is 0.50mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip is 0.45mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip is 0.40mm, and the number of the main grids is 14; or the maximum width of the cross section of the welding strip is 0.35mm, and the number of the main grids is 17; or the maximum width of the cross section of the welding strip is 0.32mm, and the number of the main grids is 19.
Optionally, the solar cell sheet is one of small pieces which are cut into 2 equal parts by a whole sheet with the side length of 160 mm-170 mm; the number of the main grids is 6-20; and the maximum width of the cross section of the welding strip is 0.2mm-0.45 mm.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 6-9; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip is 0.27 mm-0.23 mm, and the number of the main grids is 9-14.
Alternatively, the solar cell sheet is one of 2 equal-part small sheets cut from a whole sheet with the side length of 166 mm; the number of the main grids is 6-20; and the maximum width of the cross section of the welding strip is 0.2mm-0.4 mm.
Optionally, the maximum width of the cross section of the welding strip is 0.40mm, and the number of the main grids is 9; or the maximum width of the cross section of the welding strip is 0.35mm, and the number of the main grids is 10; or the maximum width of the cross section of the welding strip is 0.32mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip is 0.29mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip is 0.25mm, and the number of the main grids is 14.
Optionally, the solar cell sheet is one of small pieces which are cut into 2 equal parts by a whole sheet with the side length of 170 mm-185 mm; the number of the main grids is 7-23; and the maximum width of the cross section of the welding strip is 0.2mm-0.45 mm.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 7-10; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 8-11; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 9-14; or the maximum width of the cross section of the welding strip is 0.27 mm-0.23 mm, and the number of the main grids is 11-17.
Optionally, the solar cell sheet is one of small pieces which are cut into 2 equal parts by a whole sheet with the side length of 185 mm-200 mm; the number of the main grids is 8-27; and the maximum width of the cross section of the welding strip is 0.2mm-0.45 mm.
Optionally, the maximum width of the cross section of the welding strip is 0.45-0.37 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 9-13; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 10-15; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 11-16; or the maximum width of the cross section of the welding strip is 0.27 mm-0.23 mm, and the number of the main grids is 13-19.
Optionally, the solar cell sheet is one of small pieces which are cut into 2 equal parts by a whole sheet with the side length of 200 mm-220 mm; the number of the main grids is 6-30; and the maximum width of the cross section of the solder strip can be 0.25mm-0.55 mm.
Optionally, the maximum width of the cross section of the welding strip is 0.55mm-0.47mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip is 0.47-0.42 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip is 0.42mm-0.37mm, and the number of the main grids is 9-13; or the maximum width of the cross section of the welding strip is 0.37-0.33 mm, and the number of the main grids is 10-15; or the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, and the number of the main grids is 11-17; or the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, and the number of the main grids is 12-19; or the maximum width of the cross section of the welding strip is 0.27 mm-0.23 mm, and the number of the main grids is 15-22.
Alternatively, the solar cell sheet is one of 2 equal-divided small pieces cut from a whole sheet with the side length of 210 mm; the number of the main grids is 6-29; and the maximum width of the cross section of the solder strip can be 0.25mm-0.55 mm.
Optionally, the maximum width of the cross section of the solder strip is 0.50mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip is 0.45mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip is 0.40mm, and the number of the main grids is 13; or the maximum width of the cross section of the welding strip is 0.35mm, and the number of the main grids is 15; or the maximum width of the cross section of the welding strip is 0.32mm, and the number of the main grids is 17; or the maximum width of the cross section of the welding strip is 0.29mm, and the number of the main grids is 19; or the maximum width of the cross section of the welding strip is 0.25mm, and the number of the main grids is 22.
Alternatively, the solar cell sheet is one of the pieces cut into 3 equal parts by a whole sheet with the side length of 210; the number of the main grids is 6-22; and the maximum width of the cross section of the welding strip is 0.2mm-0.4 mm.
Optionally, the maximum width of the cross section of the solder strip is 0.40mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip is 0.35mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip is 0.32mm, and the number of the main grids is 13; or the maximum width of the cross section of the welding strip is 0.29mm, and the number of the main grids is 14; or the maximum width of the cross section of the welding strip is 0.25mm, and the number of the main grids is 16.
Compared with the prior art, the design of two aspects of the battery and the assembly structure is comprehensively considered, so that the main grid of the welding strip and the welding strip are better matched and combined, the current collection capacity of the grid line is effectively improved, the resistance loss and the shading loss are reduced, and better optical and electrical utilization rates are obtained, so that the assembly power of batteries with various sizes is optimized, especially the power on the large-size battery is optimized, and the production cost of the photovoltaic assembly is reduced.
Drawings
Fig. 1-3 are schematic structural views of a photovoltaic module according to an embodiment of the present application, wherein fig. 1 is a schematic sectional view, fig. 2 is a schematic front view of the module, and fig. 3 is a schematic rear view of the module;
FIGS. 4-16 are module power diagrams for various sizes of solar cells according to embodiments of the present application;
wherein: the solar cell module comprises a glass substrate 1, a front film 2, a solar cell sheet layer 3, a rear film 4, a back barrier plate 5, a sealant 6, a frame 7, a junction box 8, a bus bar 9 and a welding strip 10.
Detailed Description
Example 1
The application provides a photovoltaic module suitable for a solar cell. As shown in fig. 1, the photovoltaic module according to the embodiment of the present application includes a top glass 1, a front film 2, a solar cell sheet layer 3, a rear film 4, and a back barrier sheet 5, which are sequentially stacked and laminated from top to bottom. The upper glass 1, the front film 2, the solar cell sheet layer 3, the rear film 4 and the back barrier plate 5 are bonded together to form an assembly body. The upper glass 1 is a coated glass and is a light receiving surface. The back barrier plate 5 is a polymer back plate or glass. Be provided with frame 7 around the periphery of subassembly body, bond by sealed glue 6 between frame 7 and the subassembly body, in this embodiment, frame 7 is the aluminium frame.
As shown in fig. 2 and 3, the solar cell sheet 3 is a solar cell formed by connecting a plurality of small cells formed by cutting in series and/or in parallel. Each of the small cells may be a small cell cut from a cell piece with a side length in the range of 160-220mm by 3-10 equal parts. The small batteries are connected through solder strips 10, a junction box 8 is arranged on the back barrier plate 5, a bus bar 9 penetrates through a hole preset in the back plate or glass to be connected with the junction box 8, and the bus bar 9 is connected with the solder strips 10 to enable a finished circuit loop to be formed among the small batteries. Each small cell has 5-22 main gates. The maximum width of the cross section of the solder strip 10 is 0.2-0.5 mm.
The cross-section of the solder strip 10 may be circular, triangular, elliptical, semi-circular or saw-toothed. The solder strip 10 may be a braze strip having a circular cross-section. The surface of the solder strip 10 may be plated with tin-lead alloy, tin-silver alloy, tin-lead-silver alloy, tin-silver-copper alloy, tin-lead-bismuth alloy, tin-bismuth-copper alloy, tin-bismuth-silver-copper alloy, or tin-lead-bismuth-indium alloy.
The thickness of the front film 2 and the back film 4 can be controlled as follows: the height of the solder strip is added by 0.1 to 0.3 mm. The thickness has better effect, and can effectively avoid the problems of hidden crack and glue overflow. If the adhesive film is too thick, the adhesive is easy to overflow, and if the adhesive film is too thin, the battery piece is easy to break or crack.
Specifically, each of the small cells may be a small cell cut by 3 equal parts from a cell piece having a side length in the range of 160-170 mm. The number of the main gates can be 5-15.
If only the cell design is considered, the number of the main grids is preferably 6-16, and the number of the main grids is preferably 6-9 in view of cost and complexity of engineering process.
If the battery design is not considered, only the component design is considered, and in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking 0.4mm solder strip as an example, the number of the selectable main grid designs is 3-10, and the preferred range is 3-6; but combining the optical and electrical performance of the module and the cell, while considering the manufacturing cost, the number of the main grids should be 4-10, the preferred number of the main grids is 4-7, and the module power can be maximized in 7 designs.
Compared with the traditional rectangular solder strip, the optical utilization rate of the circular solder strip is improved by about 54 percent, and the optical loss is reduced. The thicker the size of the welding strip is, the less the number of the required optimal main grids is; when the more the fraction of the battery piece is cut, the fewer the number of the main grids is needed, and the smaller the size of the welding strip can be used.
When the maximum width of the cross section of the solder strip is 0.37 mm-0.33 mm, taking 0.35mm solder strip as an example, if only considering component design, the number of the selectable main grids is 4-12, and the preferred range is 4-7, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 5-11, and the preferred range of the number of the main grids is 5-8, and when 8 pieces of components are designed, the power of the component can be maximized.
When the maximum width of the cross section of the solder strip is 0.33 mm-0.3 mm, taking the solder strip of 0.32mm as an example, if only considering the component design, the number of the selectable main grids is 5-13, preferably 5-8, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 5-12, preferably 5-9, and the power of the component can be maximized in 9 designs.
When the maximum width of the cross section of the solder strip is 0.3 mm-0.27 mm, taking 0.29mm solder strip as an example, if only considering component design, the number of the selectable main grids is 6-15, and the preferred range is 6-9, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 6-13, and the preferred range of the number of the main grids is 6-9, and when 9 pieces of components are designed, the power of the component can be maximized.
When the maximum width of the cross section of the solder strip is 0.27 mm-0.23 mm, taking 0.25mm solder strip as an example, if only considering component design, the number of the selectable main grids is 8-19, and the preferred range is 8-12, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 7-15, and the preferred range of the number of the main grids is 7-11, and when 11 pieces of components are designed, the power of the component can be maximized.
The specific parameter design in this example is as follows in table 1:
through practical tests, in the embodiment, the power of the 166mm battery piece 3 equal-division cutting assembly obtained by setting different main grids and welding strip sizes is shown in fig. 4.
Example 2
This embodiment differs from embodiment 1 in the following points, and the rest can be referred to the description of embodiment 1:
each of the small-sized cells is a small piece cut by 3 equal parts from a cell piece with the side length size range of 170-185 mm. Each small cell has 4-18 main gates. The cross-sectional diameter of the solder strip 10 is 0.20mm-0.45 mm.
If only the cell design is considered, the number of the selectable main grids is designed to be 7-17, and the preferred number of the main grids ranges from 7-10 in terms of cost and complexity of engineering process; if the cell design is not considered and only the component design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking 0.4mm solder strip as an example, the number of the selectable main grid designs is 4-11, and the preferred range is 4-7. But combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the optional master grid design should be 4-12. The preferred number of main gates ranges from 4-8, and the component power can be maximized in an 8-bar design.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking 0.35mm welding strip as an example, if only considering component design, the number of the selectable main grids is 5-13, and the preferred range is 5-8. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 5-13. The preferred number of main gates ranges from 5 to 9. At 9 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, taking 0.32mm welding strip as an example, if only the component design is considered, the number of the selectable main grids is 6-15, and the preferred range is 6-9. But after combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the number of main grid designs that can be selected should be 6-14. The preferred number of main gates ranges from 6 to 10. At 10 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, 0.29mm welding strip is taken as an example, if only the component design is considered, the number of the selectable main grids is 7-18, and the preferred range is 7-11. But combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the optional primary grid design should be 7-15. The preferred number of main gates ranges from 7 to 11. At 11 designs, the component power can be maximized.
When the maximum width of the cross section of the solder strip is 0.27 mm-0.23 mm, for example, 0.25mm solder strip is adopted, for example, only the component design is considered, the number of the selectable main grids is 9-22, and the preferred range is 9-14, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, and the number of the selectable main grids should be 8-17. The preferred number of main gates ranges from 8 to 12. At 12 designs, component power can be maximized.
The specific parameter design in this example is as follows in table 2:
through practical tests, in this embodiment, the power of the 180mm battery piece 3 equal-division cutting assembly obtained by setting different numbers of main grids and sizes of the solder strips is as shown in fig. 11.
Example 3
This embodiment differs from embodiment 1 in the following points, and the rest can be referred to the description of embodiment 1:
each of the small cells was a small cell cut by 3 equal divisions from a cell piece having an edge length size range of 185-200 mm. Each small cell has 6-20 main gates. The maximum width of the cross section of the solder strip 10 is 0.2mm-0.45 mm.
If only the battery design is considered, the number of the selectable main grids is designed to be 8-19, and the number of the preferential main grids ranges from 8-11 in terms of cost and complexity of engineering process; if the cell design is not considered and only the component design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking 0.4mm solder strip as an example, the number of the selectable main grid designs is 5-13, and the preferred range is 5-8. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 6-13. The preferred number of main gates ranges from 6-10, and the component power can be maximized at 10 designs.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking 0.35mm welding strip as an example, if only considering component design, the number of the selectable main grids is 6-15, and the preferred range is 6-10. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 8-15. The preferred number of main gates ranges from 7 to 11. At 11 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, taking 0.32mm welding strip as an example, if only the component design is considered, the number of the selectable main grids is 7-18, and the preferred range is 7-11. But after combining the optical and electrical properties of the assembly and cell, the alternative primary grid design should be 7-16. The preferred number of main gates ranges from 7 to 11. At 11 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, taking 0.29mm welding strip as an example, if only considering component design, the number of the selectable main grids is 9-20, and the preferred range is 9-13. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 8-17. The preferred number of main gates ranges from 8 to 12. At 12 designs, component power can be maximized.
When the maximum width of the cross section of the solder strip is 0.27 mm-0.23 mm, taking 0.25mm solder strip as an example, only considering the component design, the number of the selectable main grids is 11-26, and the preferred range is 11-17, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, and the number of the selectable main grids should be 9-19. The preferred number of main gates ranges from 9 to 14. At 14 designs, the component power can be maximized.
The specific parameter design in this example is as follows in table 3:
through practical tests, in the embodiment, the power of the obtained 195mm battery piece 3 equal-division cutting assembly is shown in fig. 12 by setting different main grid numbers and different welding strip sizes.
Example 4
This embodiment differs from embodiment 1 in the following points, and the rest can be referred to the description of embodiment 1:
each of the small cells may be a small cell cut by 3 equal parts from a cell sheet having a side length in the range of 200-220 mm. Further, each of the small cells may be one of the small cells cut equally from the cell pieces 3 having a side length of 200 and 210 mm. Each small cell has 7-22 main gates. Further, the number of the main gates is 8-22. The maximum width of the cross section of the solder strip 10 is 0.20mm-0.45 mm.
If only the battery design is considered, the number of the selectable main grids is designed to be 8-21, and the number of the preferential main grids ranges from 8-13 in terms of cost and complexity of engineering process; if the cell design is not considered, and only the module design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking 0.4mm solder strip as an example, the number of the selectable main grid designs is 6-14, and the preferred range is 6-9. But combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the optional primary grid design should be 7-15. The preferred number of main gates ranges from 7-11, and the component power can be maximized in an 11-gate design.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking 0.35mm welding strip as an example, if only the component design is considered, the number of the selectable main grids is 8-17, and the preferred range is 8-11. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 8-16. The preferred number of main gates ranges from 8 to 12. At 12 designs, component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, taking 0.32mm welding strip as an example, if only considering component design, the number of the selectable main grids is 9-20, and the preferred range is 9-13. But after combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the number of main grid designs that can be chosen should be 8-18. The preferred number of main gates ranges from 8 to 13. At 13 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, taking 0.29mm welding strip as an example, if only considering component design, the number of the selectable main grids is 10-23, and the preferred range is 10-15. But combining the optical and electrical properties of the assembly and cell, while considering manufacturing costs, the optional primary grid design should be 9-19. The preferred number of main gates ranges from 9 to 14. At 14 designs, the component power can be maximized.
When the maximum width of the cross section of the solder strip is 0.27 mm-0.23 mm, taking 0.25mm solder strip as an example, if only considering the component design, the number of the selectable main grids is 13-29, and the preferred range is 13-19, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, and the number of the selectable main grids should be 11-22. The preferred number of main gates ranges from 11 to 16. At 16 designs, component power can be maximized.
The specific parameter design in this example is as follows in table 4:
through practical tests, in this embodiment, the power of the equally-divided cutting assembly of the 210mm battery piece 3 obtained by setting different numbers of main grids and sizes of the solder strips is as shown in fig. 5.
Example 5
This embodiment differs from embodiment 1 in the following points, and the rest can be referred to the description of embodiment 1:
each of the small-sized cells is a small cell formed by cutting a cell slice with the side length size ranging from 200 to 220mm into 4 equal parts. Each small cell has 7-20 main gates. The maximum width of the cross section of the solder strip 10 is 0.20mm-0.45 mm.
If only the battery design is considered, the number of the selectable main grids is designed to be 8-21, and the number of the preferential main grids ranges from 8-13 in terms of cost and complexity of engineering process; if the cell design is not considered, and only the module design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking 0.4mm solder strip as an example, the number of the selectable main grid designs is 4-12, and the preferred range is 4-7. But after combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the number of main grid designs that can be selected should be 6-14. The preferred number of main gates ranges from 6-10, and the component power can be maximized at 10 designs.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking 0.35mm welding strip as an example, if only considering component design, the number of the selectable main grids is 5-14, and the preferred range is 5-8. But combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the optional primary grid design should be 7-15. The preferred number of main gates ranges from 7 to 11. At 11 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, taking 0.32mm welding strip as an example, if only the component design is considered, the number of the selectable main grids is 6-16, and the preferred range is 6-10. But combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the optional master grid design should be 7-16. The preferred number of main gates ranges from 7 to 11. At 11 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, taking 0.29mm welding strip as an example, if only considering component design, the number of the selectable main grids is 7-19, and the preferred range is 7-11. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 8-17. The preferred number of main gates ranges from 8 to 12. At 12 designs, component power can be maximized.
When the maximum width of the cross section of the solder strip is 0.27 mm-0.23 mm, taking 0.25mm solder strip as an example, if only considering the component design, the number of the selectable main grids is 9-23, and the preferred range is 9-14, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered at the same time, and the number of the selectable main grids should be 9-19. The preferred number of main gates ranges from 9 to 14. At 14 designs, the component power can be maximized.
The specific parameter design in this example is as follows in table 5:
through practical tests, in this embodiment, the power of the equally-divided cutting assembly of the 210mm battery piece 4 obtained by setting different numbers of main grids and sizes of the solder strips is as shown in fig. 13.
Example 6
This embodiment differs from embodiment 1 in the following points, and the rest can be referred to the description of embodiment 1:
each of the small cells may be a small piece cut equally from the cell pieces 5 having a side length in the range of 200-220 mm. Further, each of the small cells may be one of the small cells cut equally from the cell pieces 5 having a side length of 200 and 210 mm. Each die may have 7-19 primary gates per die. Further, the number of the main gates can be 7-19. The maximum width of the cross section of the solder strip 10 is 0.2mm-0.45 mm.
If only the battery design is considered, the number of the selectable main grids is designed to be 8-21, and the number of the preferential main grids ranges from 8-13 in terms of cost and complexity of engineering process; if the cell design is not considered, and only the module design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking 0.4mm solder strip as an example, the number of the selectable main grid designs is 3-10, and the preferred range is 3-5. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 5-13. The preferred number of main gates ranges from 5 to 9. At 9 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking 0.35mm welding strip as an example, if only considering component design, the number of the selectable main grids is 4-12, and the preferred range is 4-7. But after combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the number of main grid designs that can be selected should be 6-14. The preferred number of main gates ranges from 6 to 10. At 10 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.28 mm, taking 0.30mm welding strip as an example, if only considering component design, the number of the selectable main grids is 5-15, and the preferred range is 5-9. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 6-15. The preferred number of main gates ranges from 6 to 11. At 11 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.28 mm-0.24 mm, taking 0.25mm welding strip as an example, if only considering component design, the number of the selectable main grids is 8-20, and the preferred range is 8-11. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 8-17. The preferred number of main gates ranges from 8 to 12. At 12 designs, component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.24 mm-0.2 mm, taking 0.22mm welding strip as an example, if only the component design is considered, the number of the selectable main grids is 9-24, and the preferred range is 9-14. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 8-19. The preferred number of primary gates ranges from 8 to 14. At 14 designs, the component power can be maximized.
The specific parameter design in this example is as follows in table 6:
through practical tests, in this embodiment, the power of the equally-divided cutting assembly of the 210mm battery piece 5 obtained by setting different numbers of main grids and sizes of the solder strips is shown in fig. 6.
Example 7
This embodiment differs from embodiment 1 in the following points, and the rest can be referred to the description of embodiment 1:
each of the small-sized cells is a small piece cut by equally dividing the cell piece 6 with the side length size range of 200-220 mm. Each small cell has 6-19 main gates. The maximum width of the cross section of the solder strip 10 is 0.2mm-0.45 mm.
If only the battery design is considered, the number of the selectable main grids is designed to be 8-21, and the number of the preferential main grids ranges from 8-13 in terms of cost and complexity of engineering process; if the cell design is not considered, and only the module design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking 0.4mm solder strip as an example, the number of the selectable main grid designs is 3-9, and the preferred range is 3-4. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 6-13. The preferred number of main gates ranges from 6 to 9. At 9 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking 0.35mm welding strip as an example, if only considering component design, the number of the selectable main grids is 3-11, and the preferred range is 3-6. But after combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the number of main grid designs that can be selected should be 6-14. The preferred number of main gates ranges from 6 to 10. At 10 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, taking 0.32mm welding strip as an example, if only considering component design, the number of the selectable main grids is 4-12, and the preferred range is 4-6. But after combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the number of main grid designs that can be selected should be 6-14. The preferred number of main gates ranges from 6 to 10. At 10 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, taking 0.29mm welding strip as an example, if only considering component design, the number of the selectable main grids is 4-14, and the preferred range is 4-8. But combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the optional primary grid design should be 7-15. The preferred number of main gates ranges from 7 to 11. At 11 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.27 mm-0.24 mm, taking 0.25mm welding strip as an example, if only considering component design, the number of the selectable main grids is 7-17, and the preferred range is 6-10. But combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the optional master grid design should be 7-17. The preferred number of main gates ranges from 7 to 11. At 11 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.24 mm-0.2 mm, taking 0.22mm welding strip as an example, if only the component design is considered, the number of the selectable main grids is 7-21, and the preferred range is 7-12. But after combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the number of main grid designs that can be chosen should be 8-18. The preferred number of main gates ranges from 8 to 12. At 11 designs, the component power can be maximized.
The specific parameter design in this example is as follows in table 7:
through practical tests, in the embodiment, the power of the equally-divided cutting assembly of the 210mm battery piece 6 obtained by setting different numbers of the main grids and sizes of the solder strips is shown in fig. 14.
Example 8
The present application provides another photovoltaic module suitable for use in a solar cell. As shown in fig. 1, the photovoltaic module provided in the embodiment of the present application includes, stacked and laminated from top to bottom: the solar cell module comprises upper glass 1, a front film 2, a solar cell sheet layer 3, a rear film 4 and a back barrier plate 5, wherein the upper glass 1, the front film 2, the solar cell sheet layer 3, the rear film 4 and the back barrier plate 5 are bonded together to form a module body, and the upper glass 1 is coated glass and is a light receiving surface; a frame 7 is arranged around the periphery of the assembly body, and the frame 7 and the assembly body are bonded by a sealant 6; in the present embodiment, the frame 7 is an aluminum frame.
As shown in fig. 2 and 3, the solar cell sheet layer 3 is formed by connecting several solar cells in series and/or in parallel. The side length of each solar cell sheet ranges from 160mm to 220 mm. Each solar cell is a whole solar cell or a small piece cut by 2-10 equal parts of the whole solar cell. The surface of the solar cell is provided with a bus bar 9 and a solder strip 10, the back blocking plate 5 is provided with a junction box 8, the bus bar 9 penetrates through a hole preset in the back blocking plate 5 to be connected with the junction box 8, and the bus bar 9 is connected with the solder strip 10 to enable each solar cell to form a finished circuit loop. Each solar cell slice is provided with 6-30 main grids. The solder strips 10 are welded on the main grids of the solar cell, and the number of the solder strips 10 is equal to that of the main grids of the solar cell. The cross section of the welding strip 10 is circular, triangular, elliptical, semicircular or zigzag, and the maximum width of the cross section of the welding strip 10 is 0.2-0.6 mm. The larger the size of the solder strip, the smaller the number of main grids.
The thicknesses of the front film 2 and the back film 4 are controlled as follows: the height of the solder strip is added by 0.1 to 0.3 mm. The thickness has the optimal effect, and the problems of hidden cracking and glue overflow can be effectively avoided, such as too thick glue film and easy glue overflow, and such as too thin glue film and easy cell breakage or hidden cracking.
Specifically, each solar cell sheet may be one of the small sheets formed by cutting a cell sheet with the side length size ranging from 160-170mm into 2 equal parts, and several such small sheets are connected in a matrix via the solder strips 10 to form a photovoltaic module combined in parallel and series. The number of the main gates can be 6-20. The maximum width of the cross-section of the solder strip 10 may be 0.2mm-0.45 mm. Further, the maximum width of the cross-section of the solder strip 10 may be 0.2mm to 0.4 mm.
If only the battery design is considered, the number of the selectable main grids is designed to be 6-16, and the number of the preferential grid lines ranges from 6-9 in terms of cost and complexity of engineering process; if the cell design is not considered and only the component design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking the solder strip with the diameter size of 0.4mm as an example, the number of the selectable main grid designs is 5-13, and the preferred range is 5-8; but after the optical and electrical properties of the assembly and the battery are combined, the manufacturing cost is considered, the number of the optional main grids is 6-12, the preferred number of the main grids is 6-9, and the power of the assembly can be maximized in 9 designs.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking the welding strip with the diameter size of 0.35mm as an example, if only considering the component design, the number of the selectable main grids is 7-16, and the preferred range is 7-10, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids is 6-14, and the preferred number of the main grids is 6-10, and when 10 are designed, the power of the component can be maximized.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, taking the welding strip with the diameter size of 0.32mm as an example, if only considering the design of the assembly, the number of the selectable main grids is 8-18, and the preferred range is 8-12, but after the optical and electrical properties of the assembly and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids is 7-15, and the preferred range of the number of the main grids is 7-11, and when 11 are designed, the power of the assembly can be maximized.
When the maximum width of the cross section of the solder strip is 0.3 mm-0.27 mm, taking the solder strip with the diameter size of 0.29mm as an example, if only considering the component design, the number of the selectable main grids is 10-21, and the preferred range is 10-14, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids is 8-17, and the preferred number of the main grids is 8-12, and when 12 components are designed, the power of the component can be maximized.
When the maximum width of the cross section of the solder strip is 0.27 mm-0.23 mm, taking the solder strip with the diameter size of 0.25mm as an example, if only considering the component design, the number of the selectable main grids is 12-27, and the preferred range is 12-18, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids is 9-19, and the preferred number of the main grids is 9-14, and the power of the component can be maximized in 14 designs.
The specific parameter design in this example is as follows in table 8:
through practical tests, in the embodiment, the power of the equally-divided cutting assembly of the 166mm battery piece 2 obtained by setting different numbers of the main grids and sizes of the solder strips is shown in fig. 7.
Example 9
This embodiment differs from embodiment 8 in the following points, and the rest can be referred to the description of embodiment 8:
the solar cell slice is a small slice cut by 3 equal parts from a cell slice with the side length size range of 210mm, and a plurality of small slices are connected into a matrix through welding strips 10 to form a photovoltaic module combined in parallel and series. The number of the main gates is 6-22. The maximum width of the cross section of the solder strip 10 is 0.2mm-0.4 mm.
If only the battery design is considered, the number of the selectable main grids is designed to be 8-21, and the number of the preferential grid lines ranges from 8-13 in terms of cost and complexity of engineering process; if the cell design is not considered and only the module design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.4mm, the number of the optional main grids is 6-14, and the preferred range is 6-9, but after the optical and electrical properties of the module and the cell are combined, the number of the optional main grids is 8-15, and the preferred number of the main grids is 8-11, and the module power can be maximized in the 11-unit design.
When the maximum width of the cross section of the solder strip is 0.35mm, if only the component design is considered, the number of the optional main grids is 8-17, and the preferred range is 8-11, but after the optical and electrical properties of the component and the battery are combined, the number of the optional main grids is 9-16, the preferred range is 9-12, and the component power can be maximized in 12 designs.
When the maximum width of the cross section of the solder strip is 0.32mm, if only the component design is considered, the number of the optional main grids is 9-20, and the preferred range is 9-13, but after the optical and electrical properties of the component and the battery are combined, the number of the optional main grids is 10-18, the preferred range of the main grids is 10-13, and the component power can be maximized in the 13 designs.
When the maximum width of the cross section of the solder strip is 0.29mm, if only the component design is considered, the number of the optional main grids is 10-23, and the preferred range is 10-15, but after the optical and electrical properties of the component and the battery are combined, the number of the optional main grids is 11-19, the preferred range is 11-14, and the component power can be maximized in 14 designs.
When the maximum width of the cross section of the solder strip is 0.25mm, if only the component design is considered, the number of the optional main grids is 13-29, and the preferred range is 13-19, but after the optical and electrical properties of the component and the battery are combined, the number of the optional main grids is 12-22, the preferred range of the main grids is 12-16, and the power of the component can be maximized in the 16 designs.
The specific parameter design in this example is as follows in table 9:
through practical tests, in this embodiment, the power of the equally-divided cutting assembly of the 210mm battery piece 3 obtained by setting different numbers of main grids and sizes of the solder strips is as shown in fig. 8.
Example 10
This embodiment differs from embodiment 8 in the following points, and the rest can be referred to the description of embodiment 8:
each of the small-sized cells is a small piece cut by 2 equal parts from a cell piece with the side length size range of 170-185 mm. Each small cell has 7-23 main gates. The maximum width of the cross section of the solder strip 10 is 0.20mm-0.45 mm.
If only the cell design is considered, the number of the selectable main grids is designed to be 7-17, and the preferred number of the main grids ranges from 7-10 in terms of cost and complexity of engineering process; if the cell design is not considered, and only the module design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking 0.4mm solder strip as an example, the number of the selectable main grid designs is 7-15, and the preferred range is 7-10. But combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the optional primary grid design should be 7-14. The preferred number of main gates ranges from 7-10, and the component power can be maximized in a 10-bar design.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking 0.35mm welding strip as an example, if only considering component design, the number of the selectable main grids is 9-18, and the preferred range is 9-12. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 8-15. The preferred number of main gates ranges from 8 to 11. At 11 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, taking 0.32mm welding strip as an example, if only the component design is considered, the number of the selectable main grids is 10-21, and the preferred range is 10-14. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 8-17. The preferred number of main gates ranges from 8 to 12. At 12 designs, component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, taking 0.29mm welding strip as an example, if only considering component design, the number of the selectable main grids is 12-24, and the preferred range is 12-17. But combining the optical and electrical properties of the assembly and cell, while considering manufacturing costs, the optional primary grid design should be 9-19. The preferred number of main gates ranges from 9 to 14. At 14 designs, the component power can be maximized.
When the maximum width of the cross section of the solder strip is 0.27 mm-0.23 mm, taking 0.25mm solder strip as an example, only considering the component design, the number of the selectable main grids is 15-30, and the preferred range is 15-21, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, and the number of the selectable main grids should be 11-22. The preferred number of main gates ranges from 11 to 17. At 17 designs, the component power can be maximized.
The specific parameter design in this example is as follows in table 10:
through practical tests, in this embodiment, the power of the equal-division cutting assembly of the 180mm battery piece 2 obtained by setting different numbers of the main grids and sizes of the solder strips is as shown in fig. 15.
Example 11
This embodiment differs from embodiment 8 in the following points, and the rest can be referred to the description of embodiment 8:
each of the small cells was a small cell obtained by cutting 2 equal parts of a cell piece having an edge length in the range of 185-200 mm. Each small cell has 8-27 main gates. The maximum width of the cross section of the solder strip 10 is 0.2mm-0.45 mm.
If only the battery design is considered, the number of the selectable main grids is designed to be 8-19, and the number of the preferential main grids ranges from 8-11 in terms of cost and complexity of engineering process; if the cell design is not considered, and only the module design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.45mm-0.37mm, taking 0.4mm solder strip as an example, the number of the selectable main grid designs is 8-17, and the preferred range is 8-12. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 8-16. The preferred number of main gates ranges from 8-12, and the component power can be maximized in a 12-bar design.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking 0.35mm welding strip as an example, if only considering component design, the number of the selectable main grids is 10-21, and the preferred range is 10-14. But after combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the number of main grid designs that can be chosen should be 9-18. The preferred number of main gates ranges from 9 to 13. At 13 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, taking 0.32mm welding strip as an example, if only considering component design, the number of the selectable main grids is 12-24, and the preferred range is 12-17. But after combining the optical and electrical properties of the assembly and the cell, while considering the manufacturing cost, the number of the main grid designs that can be selected should be 10-20. The preferred number of main gates is in the range of 10-15. At 15 designs, the component power can be maximized.
When the maximum width of the cross section of the welding strip is 0.3 mm-0.27 mm, taking 0.29mm welding strip as an example, if only considering component design, the number of the selectable main grids is 14-28, and the preferred range is 14-20. But after combining the optical and electrical properties of the assembly and cell, while considering the manufacturing cost, the optional primary grid design should be 11-22. The preferred number of main gates ranges from 11 to 16. At 16 designs, component power can be maximized.
When the maximum width of the cross section of the solder strip is 0.27 mm-0.23 mm, taking 0.25mm solder strip as an example, if only considering the component design, the number of the selectable main grids is 18-35, and the preferred range is 18-25, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, and the number of the selectable main grids should be 13-26. The preferred number of main gates ranges from 13 to 19. At 19 designs, the component power can be maximized.
The specific parameter design in this example is as follows in table 11:
through practical tests, in the embodiment, the power of the equal-division cutting assembly of the 195mm battery piece 2 is obtained by setting different main grids and different welding strip sizes as shown in fig. 16.
Example 12
This embodiment differs from embodiment 8 in the following points, and the rest can be referred to the description of embodiment 8:
the solar cell sheet can be a small sheet cut by 2 equal parts from a cell sheet with the side length size range of 200-220 mm. Further, the solar cell sheet may be one of 2 equal pieces cut from a whole sheet with a side of 210mm, and several such pieces are connected via solder ribbons 10 in a matrix to form a photovoltaic module in a parallel and series combination. The number of the main grids is 6-30. Further, the number of the main gates is 6-29. The maximum width of the cross-section of the solder strip 10 may be 0.25mm-0.55 mm.
If only the cell design is considered, the number of the optional main grids is designed to be 8-21, and the number of the preferential grid lines ranges from 8-13 in terms of cost and complexity of engineering process; when the maximum width of the cross section of the solder strip is 0.55mm-0.47mm, taking 0.5mm solder strip as an example, after the optical and electrical properties of the component and the battery are combined, and considering the manufacturing cost, the number of the optional main grids should be 7-15, the preferred number of the main grids is 7-11, and the power of the component can be maximized in 11 designs, which can be specifically shown in the table below and fig. 6.
When the maximum width of the cross section of the solder strip is 0.47mm-0.42mm, taking 0.45mm solder strip as an example, after the optical and electrical properties of the component and the battery are combined, and the manufacturing cost is considered, the number of the optional main grids should be 8-16, the preferred number of the main grids is 8-12, and the component power can be maximized in 12 designs.
When the maximum width of the cross section of the solder strip is 0.42mm-0.37mm, taking 0.40mm solder strip as an example, after the optical and electrical properties of the component and the battery are combined, and the manufacturing cost is also considered, the number of the optional main grids should be 9-18, the preferred number of the main grids is 9-13, and the component power can be maximized in 13 designs.
When the maximum width of the cross section of the welding strip is 0.37 mm-0.33 mm, taking 0.35mm welding strip as an example, after the optical and electrical properties of the assembly and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids is 10-20, the preferred number range of the main grids is 10-15, and the assembly power can be maximized in 15 designs.
When the maximum width of the cross section of the welding strip is 0.33 mm-0.3 mm, taking the welding strip of 0.32mm as an example, after the optical and electrical properties of the assembly and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 11-22, the preferred number range of the main grids is 11-17, and the assembly power can be maximized in 17 designs.
When the maximum width of the cross section of the solder strip is 0.3 mm-0.27 mm, taking 0.29mm solder strip as an example, after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 12-25, the preferred number range of the main grids is 12-19, and the power of the component can be maximized in 19 designs.
When the maximum width of the cross section of the solder strip is 0.27 mm-0.23 mm, taking 0.25mm solder strip as an example, after the optical and electrical properties of the component and the battery are integrated, and the manufacturing cost is considered, the number of the optional main grids should be 15-29, the preferred number range of the main grids is 15-22, and the component power can be maximized in 22 designs.
The specific parameter design in this example is as follows in table 12:
through practical tests, in this embodiment, the power of the equally-divided cutting assembly of the 210mm battery piece 2 obtained by setting different numbers of main grids and sizes of the solder strips is as shown in fig. 9.
Example 13
This embodiment differs from embodiment 8 in the following points, and the rest can be referred to the description of embodiment 8:
the solar cell can be a whole piece with the side length of 160 mm-170 mm. Further, the solar cell sheet can be a 166mm by 166mm whole sheet, and is connected into a matrix by welding strips to form a photovoltaic module combined in parallel and series. The number of the main grids is 6-25. The maximum width of the cross section of the solder strip 10 is 0.3mm-0.6 mm.
If only the cell design is considered, the number of the optional main grids is designed to be 6-16, and the preferred number of the grid lines is 6-9 in terms of cost and complexity of engineering process; if the cell design is not considered, only the component design is considered, in order to obtain the minimum optical and electrical loss, when the maximum width of the cross section of the solder strip is 0.6 mm-0.53 mm, taking 0.55mm solder strip as an example, the number of the selectable main grids is 7-15, and the preferred range is 7-10, but after the optical and electrical properties of the component and the cell are combined, the manufacturing cost is considered, the number of the selectable main grids should be 7-13, and the preferred number of the main grids is 7-10, and the component power can be maximized in 10 designs.
When the maximum width of the cross section of the solder strip is 0.53 mm-0.48 mm, taking 0.5mm solder strip as an example, if only considering component design, the number of the selectable main grids is 9-17, and the preferred range is 9-12, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 7-14, and the preferred range of the number of the main grids is 7-11, and when 11 pieces of components are designed, the power of the component can be maximized.
When the maximum width of the cross section of the solder strip is 0.48 mm-0.43 mm, taking 0.45mm solder strip as an example, if only considering component design, the number of the selectable main grids is 10-19, and the preferred range is 10-14, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 8-16, and the preferred range of the number of the main grids is 8-12, and when 12 pieces of components are designed, the power of the component can be maximized.
When the maximum width of the cross section of the solder strip is 0.43 mm-0.38 mm, taking 0.4mm solder strip as an example, if only considering component design, the number of the selectable main grids is 12-23, and the preferred range is 12-17, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is also considered, the number of the selectable main grids should be 10-19, and the preferred number of the main grids is 10-14, and when 14 pieces of components are designed, the power of the component can be maximized.
When the maximum width of the cross section of the solder strip is 0.38 mm-0.34 mm, taking 0.35mm solder strip as an example, if only considering component design, the number of the selectable main grids is 16-29, and the preferred range is 16-21, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 12-22, and the preferred range of the number of the main grids is 12-17, and the component power can be maximized in 17 designs.
When the maximum width of the cross section of the solder strip is 0.34 mm-0.30 mm, taking 0.32mm solder strip as an example, if only considering component design, the number of the selectable main grids is 19-33, and the preferred range is 19-24, but after the optical and electrical properties of the component and the battery are integrated, the manufacturing cost is considered, the number of the selectable main grids should be 13-25, and the preferred range of the number of the main grids is 13-19, and when 19 pieces of components are designed, the power of the component can be maximized.
The specific parameter design in this example is as follows in table 13:
through practical tests, in the embodiment, the power of the 166mm battery full-piece assembly obtained by setting different main grid numbers and welding strip sizes is shown in fig. 10.
In summary of the above descriptions of embodiments 1-13, the photovoltaic module of the solar cell provided by the present application considers the design of both the cell and the module structure, and also considers the optical and electrical properties of the cell and the module layer. The battery needs to consider the factors of main grid and fine grid design, diffusion sheet resistance, matrix resistivity, minority carrier lifetime, surface and edge composition, metallization contact, surface passivation effect, texture structure and the like, and the component structure needs to consider the factors of solder strip resistance, optical utilization rate, packaging material and the like. The influence of the factors is comprehensively considered, the photovoltaic module is designed, so that the sizes of the main grid of the welding strip and the welding strip are better matched and combined, the current collecting capacity of the grid line is effectively improved, the resistance loss and the shading loss are reduced, and better optical and electrical utilization rates are obtained, so that the module power of batteries with various sizes is optimized, and the production cost of the photovoltaic module is reduced. In particular, the power of the components is optimized when used on batteries of larger dimensions than those currently available.
It should be noted that the specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the present application as defined by the appended claims. According to the configuration scheme of the number of the main grids and the size of the solder strips, various configurations can be carried out, so that the assembly achieves the highest efficiency.
Claims (43)
1. A photovoltaic module suitable for a solar cell is characterized by comprising an upper glass (1), a front film (2), a solar cell sheet layer (3), a rear film (4) and a back barrier plate (5) which are sequentially stacked from top to bottom and are laminated; the solar cell module comprises an upper glass (1), a front film (2), a solar cell sheet layer (3), a rear film (4) and a back barrier plate (5), wherein the upper glass (1), the front film (2), the solar cell sheet layer, the rear film (4) and the back barrier plate (5) are bonded together to form a module body, the upper glass (1) is coated glass and is a light receiving surface, and the back barrier plate (5) is a polymer back plate or glass;
the solar cell sheet layer (3) is a solar cell formed by connecting a plurality of cut small cells in series and/or in parallel, the small cells are connected through welding strips (10), the welding strips (10) are welded on main grids of the small cells, the number of the welding strips is equal to that of the main grids of the small cells, and each small cell is a small cell formed by cutting a cell sheet with the side length size range of 160 and 220mm by 3-10 equal parts;
each small cell is provided with 5-22 main gates; and
the maximum width of the cross section of the welding strip (10) is 0.2-0.5 mm.
2. The photovoltaic module of claim 1, wherein: the cross section of the welding strip (10) can be circular, triangular, elliptical, semicircular or zigzag.
3. The photovoltaic module of claim 2, wherein: the welding strip (10) is a brazing strip; and the surface of the welding strip (10) is plated with a tin-lead alloy, a tin-silver alloy, a tin-lead-silver alloy, a tin-silver-copper alloy, a tin-lead-bismuth alloy, a tin-bismuth-copper alloy, a tin-bismuth-silver-copper alloy or a tin-lead-bismuth-indium alloy.
4. The photovoltaic module of claim 1, wherein: the thicknesses of the front film (2) and the rear film (4) are controlled as follows: the height of the welding strip (10) is added by 0.1 to 0.3 mm.
5. The photovoltaic module of claim 3, wherein: each small cell is one of small pieces formed by equally cutting the cell pieces 3 with the side length of 160-170 mm; and the number of the main grids is 5-15.
6. The photovoltaic module of claim 5, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 4-7; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 5-8; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 5-9; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 6-9; or the maximum width of the cross section of the welding strip (10) is 0.27 mm-0.23 mm, and the number of the main grids is 7-11.
7. The photovoltaic module of claim 6, wherein: the maximum width of the cross section of the welding strip (10) is 0.4mm, and the number of the main grids is 7; or the maximum width of the cross section of the welding strip (10) is 0.35mm, and the number of the main grids is 8; or the maximum width of the cross section of the welding strip (10) is 0.32mm, and the number of the main grids is 9; or the maximum width of the cross section of the welding strip (10) is 0.29mm, and the number of the main grids is 9; or the maximum width of the cross section of the welding strip (10) is 0.25mm, and the number of the main grids is 11.
8. The photovoltaic module of claim 3, wherein: each of the small-sized cells is one of small-sized cells formed by equally cutting the cell slices 3 with the side length of 170-185 mm; and the number of the main gates is 4-18.
9. The photovoltaic module of claim 8, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 4-8; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 5-9; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.27 mm-0.23 mm, and the number of the main grids is 8-12.
10. The photovoltaic module of claim 3, wherein: each small battery is one of small pieces formed by equally cutting battery pieces 3 with the side length of 185 mm-200 mm; and the number of the main gates is 6-20.
11. The photovoltaic module of claim 10, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip (10) is 0.27 mm-0.23 mm, and the number of the main grids is 9-14.
12. The photovoltaic module of claim 3, wherein: each small cell is one of small pieces formed by equally cutting the cell pieces 3 with the side length of 200 and 220 mm; and the number of the main gates is 7-22.
13. The photovoltaic module of claim 12, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 8-13; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 9-14; or the maximum width of the cross section of the welding strip (10) is 0.27-0.23 mm, and the number of the main grids is 11-16.
14. The photovoltaic module of claim 3, wherein: each small cell is one of small pieces formed by equally cutting the cell pieces 3 with the side length of 200 and 210 mm; and the number of the main gates is 8-22.
15. The photovoltaic module of claim 14, wherein: the maximum width of the cross section of the welding strip (10) is 0.4mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip (10) is 0.35mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip (10) is 0.32mm, and the number of the main grids is 13; or the maximum width of the cross section of the welding strip (10) is 0.29mm, and the number of the main grids is 14; or the maximum width of the cross section of the welding strip (10) is 0.25mm, and the number of the main grids is 16.
16. The photovoltaic module of claim 3, wherein: each small cell is one of small pieces formed by equally cutting the cell piece 4 with the side length of 200 and 220 mm; and the number of the main gates is 7-20.
17. The photovoltaic module of claim 16, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip (10) is 0.27 mm-0.23 mm, and the number of the main grids is 9-14.
18. The photovoltaic module of claim 3, wherein: each small battery is one of small pieces formed by equally cutting battery pieces 5 with the side length of 200-220 mm; and the number of the main gates is 7-19.
19. The photovoltaic module of claim 18, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 5-9; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.28 mm, and the number of the main grids is 6-11; or the maximum width of the cross section of the welding strip (10) is 0.28-0.24 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip (10) is 0.24-0.2 mm, and the number of the main grids is 8-14.
20. The photovoltaic module of claim 3, wherein: each small cell is one of small pieces formed by equally cutting cell pieces 5 with the side length of 200 and 210 mm; and the number of the main gates is 7-19.
21. The photovoltaic module of claim 20, wherein: the maximum width of the cross section of the welding strip (10) is 0.4mm, and the number of the main grids is 9; or the maximum width of the cross section of the welding strip (10) is 0.35mm, and the number of the main grids is 10; or the maximum width of the cross section of the welding strip (10) is 0.3mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip (10) is 0.25mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip (10) is 0.22mm, and the number of the main grids is 14.
22. The photovoltaic module of claim 3, wherein: each small cell is one of small cells formed by cutting the cell sheet 6 with the side length of 200 and 220mm in equal parts; and the number of the main gates is 6-19.
23. The photovoltaic module of claim 22, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 6-9; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.27-0.24 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.24 mm-0.2 mm, and the number of the main grids is 8-12.
24. The photovoltaic module is characterized by comprising upper glass (1), a front film (2), a solar cell sheet layer (3), a rear film (4) and a back barrier plate (5) which are sequentially stacked from top to bottom and are laminated, wherein the upper glass (1), the front film (2), the solar cell sheet layer (3), the rear film (4) and the back barrier plate (5) are bonded together to form a module body, the upper glass (1) is coated glass and is a light receiving surface, and the back barrier plate (5) is back plate polymer or glass;
the solar cell sheet layer (3) is formed by connecting a plurality of solar cells in series and/or in parallel; the side length size range of each solar cell is 160-220 mm; each solar cell is a whole piece or a small piece cut by 2-10 equal parts of the whole piece; each solar cell sheet is connected in series and/or in parallel by welding strips (10) to form the solar cell sheet layer (3); the welding strips (10) are welded on the main grids of the solar cell, and the number of the welding strips (10) is equal to that of the main grids of the solar cell;
each solar cell slice is provided with 6-30 main grids; and
the cross section of the welding strip (10) is circular, triangular, elliptical, semicircular or zigzag, the maximum width of the cross section of the welding strip (10) is 0.2-0.6mm, and the larger the size of the welding strip (10), the smaller the number of the main grids.
25. The photovoltaic module of claim 24, wherein: the thicknesses of the front film (2) and the rear film (4) are controlled as follows: the height of the welding strip (10) is added by 0.1 to 0.3 mm.
26. The photovoltaic module of claim 24, wherein: the solar cell is a whole piece with the side length of 160-170 mm; the number of the main grids is 6-25; and the maximum width of the cross section of the welding strip (10) is 0.3mm-0.6 mm.
27. The photovoltaic module of claim 26, wherein: the maximum width of the cross section of the welding strip (10) is 0.6-0.53 mm, and the number of the main grids is 7-10; or the maximum width of the cross section of the welding strip (10) is 0.53-0.48 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.48-0.43 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip (10) is 0.43-0.38 mm, and the number of the main grids is 10-14; or the maximum width of the cross section of the welding strip (10) is 0.38-0.34 mm, and the number of the main grids is 12-17; or the maximum width of the cross section of the welding strip (10) is 0.34 mm-0.30 mm, and the number of the main grids is 13-19.
28. The photovoltaic module of claim 24, wherein: the solar cell is a whole piece with the side length of 166 mm; the number of the main grids is 6-25; and the maximum width of the cross section of the welding strip (10) is 0.3mm-0.6 mm.
29. The photovoltaic module of claim 28, wherein: the maximum width of the cross section of the welding strip (10) is 0.55mm, and the number of the main grids is 10; or the maximum width of the cross section of the welding strip (10) is 0.50mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip (10) is 0.45mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip (10) is 0.40mm, and the number of the main grids is 14; or the maximum width of the cross section of the welding strip (10) is 0.35mm, and the number of the main grids is 17; or the maximum width of the cross section of the welding strip (10) is 0.32mm, and the number of the main grids is 19.
30. The photovoltaic module of claim 24, wherein: the solar cell sheet is one of 2 equal-divided small sheets cut from a whole sheet with the side length of 160 mm-170 mm; the number of the main grids is 6-20; and the maximum width of the cross section of the welding strip (10) is 0.2mm-0.45 mm.
31. The photovoltaic module of claim 30, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 6-9; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 6-10; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip (10) is 0.27 mm-0.23 mm, and the number of the main grids is 9-14.
32. The photovoltaic module of claim 24, wherein: the solar cell sheet is one of small pieces which are cut into 2 equal parts by a whole sheet with the side length of 166 mm; the number of the main grids is 6-20; and the maximum width of the cross section of the welding strip (10) is 0.2mm-0.4 mm.
33. The photovoltaic module of claim 32, wherein: the maximum width of the cross section of the welding strip (10) is 0.40mm, and the number of the main grids is 9; or the maximum width of the cross section of the welding strip (10) is 0.35mm, and the number of the main grids is 10; or the maximum width of the cross section of the welding strip (10) is 0.32mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip (10) is 0.29mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip (10) is 0.25mm, and the number of the main grids is 14.
34. The photovoltaic module of claim 24, wherein: the solar cell sheet is one of 2 equal-divided small sheets cut from a whole sheet with the side length of 170-185 mm; the number of the main grids is 7-23; and the maximum width of the cross section of the welding strip (10) is 0.2mm-0.45 mm.
35. The photovoltaic module of claim 34, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 7-10; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 8-11; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 9-14; or the maximum width of the cross section of the welding strip (10) is 0.27-0.23 mm, and the number of the main grids is 11-17.
36. The photovoltaic module of claim 24, wherein: the solar cell sheet is one of 2 equal-divided small sheets cut from a whole sheet with the side length of 185 mm-200 mm; the number of the main grids is 8-27; and the maximum width of the cross section of the welding strip (10) is 0.2mm-0.45 mm.
37. The photovoltaic module of claim 36, wherein: the maximum width of the cross section of the welding strip (10) is 0.45-0.37 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 9-13; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 10-15; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 11-16; or the maximum width of the cross section of the welding strip (10) is 0.27 mm-0.23 mm, and the number of the main grids is 13-19.
38. The photovoltaic module of claim 24, wherein: the solar cell sheet is one of 2 equal-divided small sheets cut from a whole sheet with the side length of 200 mm-220 mm; the number of the main grids is 6-30; and the maximum width of the cross section of the welding strip (10) is 0.25mm-0.55 mm.
39. The photovoltaic module of claim 38, wherein: the maximum width of the cross section of the welding strip (10) is 0.55-0.47 mm, and the number of the main grids is 7-11; or the maximum width of the cross section of the welding strip (10) is 0.47-0.42 mm, and the number of the main grids is 8-12; or the maximum width of the cross section of the welding strip (10) is 0.42-0.37 mm, and the number of the main grids is 9-13; or the maximum width of the cross section of the welding strip (10) is 0.37-0.33 mm, and the number of the main grids is 10-15; or the maximum width of the cross section of the welding strip (10) is 0.33 mm-0.3 mm, and the number of the main grids is 11-17; or the maximum width of the cross section of the welding strip (10) is 0.3-0.27 mm, and the number of the main grids is 12-19; or the maximum width of the cross section of the welding strip (10) is 0.27 mm-0.23 mm, and the number of the main grids is 15-22.
40. The photovoltaic module of claim 24, wherein: the solar cell sheet is one of small pieces which are cut into 2 equal parts by a whole sheet with the side length of 210 mm; the number of the main grids is 6-29; and the maximum width of the cross section of the welding strip (10) is 0.25mm-0.55 mm.
41. The photovoltaic module of claim 40, wherein: the maximum width of the cross section of the welding strip (10) is 0.50mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip (10) is 0.45mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip (10) is 0.40mm, and the number of the main grids is 13; or the maximum width of the cross section of the welding strip (10) is 0.35mm, and the number of the main grids is 15; or the maximum width of the cross section of the welding strip (10) is 0.32mm, and the number of the main grids is 17; or the maximum width of the cross section of the welding strip (10) is 0.29mm, and the number of the main grids is 19; or the maximum width of the cross section of the welding strip (10) is 0.25mm, and the number of the main grids is 22.
42. The photovoltaic module of claim 24, wherein: the solar cell sheet is one of small pieces which are cut into 3 equal parts by a whole piece with the side length of 210; the number of the main grids is 6-22; and the maximum width of the cross section of the welding strip (10) is 0.2mm-0.4 mm.
43. The photovoltaic module of claim 42, wherein: the maximum width of the cross section of the welding strip (10) is 0.40mm, and the number of the main grids is 11; or the maximum width of the cross section of the welding strip (10) is 0.35mm, and the number of the main grids is 12; or the maximum width of the cross section of the welding strip (10) is 0.32mm, and the number of the main grids is 13; or the maximum width of the cross section of the welding strip (10) is 0.29mm, and the number of the main grids is 14; or the maximum width of the cross section of the welding strip (10) is 0.25mm, and the number of the main grids is 16.
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| CN201910943981.6A CN110571293A (en) | 2019-09-30 | 2019-09-30 | Photovoltaic module suitable for jumbo size solar cell |
| CN2019109439816 | 2019-09-30 | ||
| CN2019111471627 | 2019-11-21 | ||
| CN201911147162.7A CN110739356A (en) | 2019-11-21 | 2019-11-21 | large-size solar cell photovoltaic module |
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| CN111370505A (en) * | 2019-09-30 | 2020-07-03 | 天合光能股份有限公司 | Photovoltaic module suitable for solar cell |
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| CN115084301B (en) * | 2022-01-13 | 2024-01-23 | 浙江晶科能源有限公司 | Solar energy assembly |
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| US6130465A (en) * | 1997-10-29 | 2000-10-10 | Light Point Systems Inc. | Micro-solar assembly |
| JP2010165944A (en) * | 2009-01-16 | 2010-07-29 | Mitsubishi Electric Corp | Photovoltaic device and method of manufacturing the same, and device for manufacturing photovoltaic device |
| JP2015207598A (en) * | 2014-04-17 | 2015-11-19 | 三菱電機株式会社 | Solar cell module, solar cell, and inter-element connection body |
| CN108687418B (en) * | 2017-04-04 | 2021-03-12 | 天合光能股份有限公司 | Solder strip connection method of solar cell |
| CN108229007B (en) * | 2017-12-29 | 2021-06-22 | 苏州阿特斯阳光电力科技有限公司 | Multi-main-grid photovoltaic module simulation method and photovoltaic module |
| CN109360863A (en) * | 2018-11-09 | 2019-02-19 | 连云港神舟新能源有限公司 | A kind of novel stacked wafer moudle |
| CN111370505A (en) * | 2019-09-30 | 2020-07-03 | 天合光能股份有限公司 | Photovoltaic module suitable for solar cell |
| CN110571287A (en) * | 2019-09-30 | 2019-12-13 | 天合光能股份有限公司 | Photovoltaic module of large-size solar cell |
| CN110739356A (en) * | 2019-11-21 | 2020-01-31 | 天合光能股份有限公司 | large-size solar cell photovoltaic module |
| CN110571293A (en) * | 2019-09-30 | 2019-12-13 | 天合光能股份有限公司 | Photovoltaic module suitable for jumbo size solar cell |
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Effective date of registration: 20230703 Address after: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu Patentee after: TRINASOLAR Co.,Ltd. Patentee after: TRINA SOLAR( CHANGZHOU) TECHNOLOGY Co.,Ltd. Address before: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu Patentee before: TRINASOLAR Co.,Ltd. |