CN214672639U - Photovoltaic laminated tile assembly of wave-shaped path laminated sheet - Google Patents
Photovoltaic laminated tile assembly of wave-shaped path laminated sheet Download PDFInfo
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- CN214672639U CN214672639U CN202120880707.1U CN202120880707U CN214672639U CN 214672639 U CN214672639 U CN 214672639U CN 202120880707 U CN202120880707 U CN 202120880707U CN 214672639 U CN214672639 U CN 214672639U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model relates to a photovoltaic laminated tile assembly of wave-shaped path laminated sheets, which comprises at least one battery string; the battery string comprises a plurality of isosceles trapezoid battery pieces which are connected in series in a shingled mode along a wave path; when there are a plurality of battery strings, the plurality of battery strings are coupled in series and/or in parallel. The utility model discloses can effectively reduce silicon wafer's loss, increase every silicon wafer's effective generating area.
Description
Technical Field
The utility model relates to a photovoltaic shingle assembly, in particular to photovoltaic shingle assembly of wave route lamination.
Background
The shingle assembly structure can realize seamless connection between the battery units, and the light-facing surfaces of the battery units can adopt a design without a main grid, so that the cost can be reduced and the shingle assembly structure has a unique visual effect compared with the traditional photovoltaic assembly. While the structural design of the stack assembly currently on the market comprises a structural design with transverse and vertical arrangement of the battery cells, reference may be made to patents EP3149775B1 and US10580917B2, respectively. The shape of the battery sheet, which is the basic unit of the conventional shingle assembly structure, tends to be rectangular. As a rectangular battery piece or a battery strip, a silicon wafer is often obtained by cutting according to an inscribed square of a silicon wafer, a battery piece with a power generation function is prepared by using the square silicon wafer as a substrate, and then the battery piece is laser-cut into a plurality of rectangular battery strips. In either case, the power generation area of the silicon wafer is the area of the inscribed square. In order to reduce the cost and improve the power generation efficiency, it is a considerable research direction to increase the power generation area of the silicon wafer cell.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a photovoltaic shingle assembly of wave route lamination, it can effectively reduce silicon wafer's loss, increases every silicon wafer's effective generating area.
Realize the utility model discloses the technical scheme of purpose is: the utility model discloses a photovoltaic laminated tile assembly of a medium wave-shaped path laminated sheet, which comprises at least one battery string; the battery string comprises a plurality of isosceles trapezoid battery pieces which are connected in series in a shingled mode along a wave path; when there are a plurality of battery strings, the plurality of battery strings are coupled in series and/or in parallel.
The wave path comprises a plurality of wave unit paths which are arranged in a straight line; the wave unit path comprises a lower arc path and an upper arc path which are naturally connected; the central angle theta 1 of the lower arc path is equal to the central angle theta 2 of the upper arc path; x isosceles trapezoid battery pieces are arranged on the lower arc path, and x is more than or equal to 2; x isosceles trapezoid battery pieces are also arranged on the upper arc path; the included angle alpha between the two side waists of the isosceles trapezoid battery piece is theta 1/x; the front surface of the waist of the upper isosceles trapezoid battery piece on the lower arc path is connected with the back surface of the waist of the lower isosceles trapezoid battery piece in series through conductive adhesive; the front surface of the waist of the upper isosceles trapezoid battery piece on the upper arc path is connected with the back surface of the waist of the lower isosceles trapezoid battery piece in series through conductive adhesive; the upper bottom edge of the isosceles trapezoid battery piece on the lower arc path is positioned on the inner side of the arc of the lower arc path; the upper bottom edge of the isosceles trapezoid battery piece on the upper arc path is positioned on the inner side of the arc of the upper arc path.
The central angle theta 1 of the lower circular arc path and the central angle theta 2 of the upper circular arc path are both 60 deg..
And x is an integer of 2 or more. Preferably 2 or 3 or 4.
The utility model discloses in prepare foretell wave path lamination's photovoltaic shingle assembly's preparation method, including following step:
s1, making a cutting layout of the battery unit prepared by cutting the silicon wafer, wherein the cutting layout comprises an outer polygon, an inner polygon and a plurality of radial cutting lines; the number of the sides of the outer polygon is equal to the number of the sides of the inner polygon; the sides of the outer polygon correspond to the lower bottom edges of the isosceles trapezoid battery pieces and are equal in length, and the sides of the inner polygon correspond to the upper bottom edges of the isosceles trapezoid battery pieces and are equal in length; the radial cutting lines extend outwards from the center of a silicon wafer in the radial direction, the number n of the radial cutting lines is obtained through the following calculation formula, and n is an integer:
wherein, every radial cutting line corresponds the waist of a isosceles trapezoid battery piece of passing through.
S2, cutting according to the cutting layout to obtain battery cells;
s3, obtaining a semi-finished product of the battery piece after the battery unit is subjected to texturing, diffusion, etching and passivation;
s4, respectively printing a front electrode and a back electrode on the front surface and the back surface of the semi-finished product of the battery piece to obtain an isosceles trapezoid battery piece;
s5, connecting the isosceles trapezoid battery pieces in series in a tile-overlapping manner according to the arrangement mode of the isosceles trapezoid battery pieces along the wave path to obtain a battery string;
s6, selecting one battery string or a plurality of battery strings as required to form a photovoltaic laminated assembly with a wave-shaped path lamination; when there are a plurality of battery strings, the plurality of battery strings are connected in parallel and/or in series.
Alternative to the process steps S1-S4: the method comprises the steps of preparing a cell with a silicon wafer as a substrate and a power generation function, and carrying out laser cutting on the cell to obtain an isosceles trapezoid cell so as to reduce the process preparation cost.
The outer polygon is an inscribed regular polygon of the excircle of the silicon wafer, and the radius of the excircle of the silicon wafer is R; the inner polygon is an inscribed regular polygon of a circle with the radius r; the radius R is smaller than R/2.
The utility model discloses has positive effect: (1) the utility model discloses well battery cluster is constituteed with a plurality of isosceles trapezoid battery pieces that follow wave route and establish ties with the form of tiling and connect, not only can promote the visual effect of photovoltaic tiling subassembly, can effectively reduce silicon wafer's loss when preparation isosceles trapezoid battery piece moreover to increase every silicon wafer's effective generating area.
(2) The utility model discloses the relation between the quantity x of central angle theta 1 on well circular arc route, the central angle theta 2 on last circular arc route and the isosceles trapezoid battery piece can obtain more pleasing to the eye battery cluster to can furthest promote silicon wafer's cutting scheme.
(3) In the utility model, the outer polygon is an inner-connected regular polygon of the excircle of the silicon wafer, wherein the radius of the excircle of the silicon wafer is R; the inner polygon is an inscribed regular polygon of a circle with the radius R, and the radius R is smaller than R/2, so that the power generation area of the isosceles trapezoid battery piece can be further increased.
(4) The utility model discloses in prepare foretell wave path lamination's photovoltaic shingle assembly's preparation method can obtain the cutting scheme according to actual product size fast, form the general method of industrialization.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic structural view of a photovoltaic laminated tile assembly of a medium wave path laminated sheet according to the present invention;
fig. 2 is a schematic structural diagram of a battery string according to the present invention;
fig. 3 is a schematic diagram of an arrangement of isosceles trapezoid battery cells on a path of a medium wave unit of the present invention;
FIG. 4 is a cutting diagram of a silicon wafer according to the present invention;
fig. 5 is a corresponding relationship diagram of the arrangement of the isosceles trapezoid battery pieces and the cutting diagram of the silicon wafer according to the present invention;
fig. 6 is a schematic view showing an arrangement of isosceles trapezoid cells on a wave unit path in embodiment 2 of the present invention;
fig. 7 is a schematic view of an arrangement of isosceles trapezoid battery cells on a wave unit path in embodiment 3 of the present invention.
Detailed Description
(example 1)
Referring to fig. 1 to 3, the photovoltaic laminated tile assembly of the medium wave path laminated sheet of the present invention includes a plurality of parallel-connected battery strings 1; the cell string 1 comprises a plurality of isosceles trapezoid-shaped cell pieces 11 coupled in series in a shingled manner along the wave path 2.
The wave path 2 comprises a plurality of linearly arranged wave unit paths 21; the wave unit path 21 comprises a naturally-joined lower arc path 211 and an upper arc path 212; the central angle θ 1 of the lower circular arc path 211 is equal to the central angle θ 2 of the upper circular arc path, and θ 1 ═ θ 2 ═ 60 °; 2 isosceles trapezoid battery pieces 11 are arranged on the lower arc path 211; 2 isosceles trapezoid battery pieces 11 are also arranged on the upper arc path 212; the included angle α between the two side waists of the isosceles trapezoid battery piece 11 is θ 1 ÷ 2 ═ 30 °; the front surface of the waist of the previous isosceles trapezoid battery piece 11 on the lower arc path 211 is connected in series with the back surface of the waist of the next isosceles trapezoid battery piece 11 through a conductive adhesive; the front surface of the waist of the previous isosceles trapezoid battery piece 11 on the upper arc path 212 is connected in series with the back surface of the waist of the next isosceles trapezoid battery piece 11 through a conductive adhesive; the upper bottom edge of the isosceles trapezoid battery piece 11 on the lower arc path 211 is positioned on the inner side of the arc of the lower arc path 211; the upper bottom edge of the isosceles trapezoid battery piece 11 on the upper arc path 212 is located inside the arc of the upper arc path 212.
Referring to fig. 4 and 5, the method for manufacturing the photovoltaic laminated assembly with the wave-shaped path lamination of the present invention includes the following steps:
s1, preparing a cutting layout of the battery unit 31 on the silicon wafer 3, wherein the cutting layout comprises an outer polygon 4, an inner polygon 5 and a plurality of radial cutting lines 6; the number of sides of the outer polygon 4 is equal to the number of sides of the inner polygon 5; the side of the outer polygon 4 corresponds to the lower bottom edge of the isosceles trapezoid battery piece 11 and is equal in length, and the side of the inner polygon 5 corresponds to the upper bottom edge of the isosceles trapezoid battery piece 11 and is equal in length; the outer polygon 4 is an inscribed regular polygon of the excircle of the silicon wafer 3, and the radius of the excircle of the silicon wafer 3 is R; the inner polygon 5 is an inscribed regular polygon of a circle with the radius r; the radius R is less than R/2; the radial cutting lines 6 extend radially outwards from the center of the silicon wafer 3, the number n of the radial cutting lines 6 is 12, and each radial cutting line 6 correspondingly passes through the waist of one isosceles trapezoid battery piece 11.
S2, cutting according to the cutting layout to obtain the battery cell 31;
s3, obtaining a semi-finished product of the battery piece after the battery unit 31 is subjected to texturing, diffusion, etching and passivation;
s4, respectively printing a front electrode and a back electrode on the front surface and the back surface of the semi-finished product of the battery piece to obtain an isosceles trapezoid battery piece 11;
s5, connecting the isosceles trapezoid battery pieces 11 in series in a tile-overlapping manner according to the arrangement mode of the isosceles trapezoid battery pieces along the wave path 2 to obtain a battery string 1;
and S6, connecting a plurality of cell strings 1 in parallel to form the photovoltaic laminated tile assembly of the wave-shaped path laminated sheet.
It is considered that the above preparation method can effectively improve the utilization rate of silicon wafers, and can be understood by the following explanation:
suppose that: and cutting an inscribed regular n-polygon of one silicon wafer, wherein the power generation area of all the battery units after cutting is as follows:
the common square monocrystalline silicon wafer in the current market is an inscribed square of a silicon wafer, and the power generation area-calculation formula of the battery unit is as follows:
A2＝2R2
in general, in order to increase the power generation area of a battery cell cut by a silicon wafer inscribed regular n-polygon, the radius r is usually less than 1/2, and the numerical ratio of A1 to A2 is calculated by the formula
The numerical calculation adopted in the technical scheme is shown in table 1, and the numerical ratio of A1 to A2 is larger than 1, which shows that the cutting mode of the silicon wafer cell in the technical scheme can increase the effective power generation area of the cell unit and achieve the purpose of saving crystalline silicon materials.
The following table shows the numerical ratio of the area of the battery unit cut from the silicon wafer in the present embodiment to the area of the battery unit cut from the square silicon wafer of the conventional silicon wafer.
(example 2)
The middle and lower arc path of the utility model is provided with 3 isosceles trapezoid battery pieces 11; 2 isosceles trapezoid battery pieces 11 are also arranged on the upper arc path 211; the angle α between the two side waists of the isosceles trapezoid battery piece 11 is θ 1 ÷ 2 ═ 20 °. The number n of radial cutting lines 6 is 18.
Other technical features are the same as those of embodiment 1.
(example 2)
The middle and lower arc path of the utility model is provided with 4 isosceles trapezoid battery pieces 11; 2 isosceles trapezoid battery pieces 11 are also arranged on the upper arc path 211; the angle α between the two side waists of the isosceles trapezoid battery piece 11 is θ 1 ÷ 2 ═ 15 °. The number n of radial cutting lines 6 is 24.
Other technical features are the same as those of embodiment 1.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A photovoltaic shingle assembly of wave path laminations characterized in that: comprises at least one battery string; the battery string comprises a plurality of isosceles trapezoid battery pieces which are connected in series in a shingled mode along a wave path; when there are a plurality of battery strings, the plurality of battery strings are coupled in series and/or in parallel.
2. The waved path laminated photovoltaic shingle assembly according to claim 1, wherein: the wave path comprises a plurality of linearly arranged wave unit paths; the wave unit path comprises a lower arc path and an upper arc path which are naturally connected; the central angle theta 1 of the lower arc path is equal to the central angle theta 2 of the upper arc path; x isosceles trapezoid battery pieces are arranged on the lower arc path, and x is more than or equal to 2; x isosceles trapezoid battery pieces are also arranged on the upper arc path; the included angle alpha between the two side waists of the isosceles trapezoid battery piece is theta 1/x; the front surface of the waist of the upper isosceles trapezoid battery piece on the lower arc path is connected with the back surface of the waist of the lower isosceles trapezoid battery piece in series through conductive adhesive; the front surface of the waist of the upper isosceles trapezoid battery piece on the upper arc path is connected with the back surface of the waist of the lower isosceles trapezoid battery piece in series through conductive adhesive; the upper bottom edge of the isosceles trapezoid battery piece on the lower arc path is positioned on the inner side of the arc of the lower arc path; the upper bottom edge of the isosceles trapezoid battery piece on the upper arc path is positioned on the inner side of the arc of the upper arc path.
3. The waved path laminated photovoltaic shingle assembly according to claim 2, wherein: the central angle theta 1 of the lower circular arc path and the central angle theta 2 of the upper circular arc path are both 60 deg..
4. A wave path laminated photovoltaic shingle assembly according to claim 3 wherein: and x is an integer greater than or equal to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120880707.1U CN214672639U (en) | 2021-04-27 | 2021-04-27 | Photovoltaic laminated tile assembly of wave-shaped path laminated sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120880707.1U CN214672639U (en) | 2021-04-27 | 2021-04-27 | Photovoltaic laminated tile assembly of wave-shaped path laminated sheet |
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| Publication Number | Publication Date |
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| CN214672639U true CN214672639U (en) | 2021-11-09 |
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| CN202120880707.1U Active CN214672639U (en) | 2021-04-27 | 2021-04-27 | Photovoltaic laminated tile assembly of wave-shaped path laminated sheet |
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- 2021-04-27 CN CN202120880707.1U patent/CN214672639U/en active Active
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