SOLAR CELL PHOTOVOLTAIC MODULE AND SOLAR CELL PHOTOVOLTAIC ASSEMBLY

Abstract

The present disclosure relates to a solar cell photovoltaic module and a solar cell photovoltaic assembly. The solar cell photovoltaic module comprises a plurality of matrix-arranged cells, a plurality of main grids and fine grids are distributed on the light receiving surface of the cells, the main grids collect currents on the fine grids connected thereto, the currents collected by the main grids are transmitted through interconnects that connect to the main grids, and the cells are rectangular. The solar cell photovoltaic assembly comprises modules and bus bars, wherein two adjacent modules are connected via a diode or via a virtual conductive wire plus a diode, and the bus bars and the conductive wire are connected with an output via a junction box.

Claims

1. A solar cell photovoltaic module comprising a plurality of matrix-arranged cells, wherein a plurality of main grids and fine grids are distributed on a light receiving surface of the cells, the main grids collect currents on the fine grids connected thereto, the currents collected by the main grids are transmitted through interconnectors that connect to the main grids, the cells are rectangular, lengths of long sides of the cells are 156-160 mm, lengths of short sides of the cells are 31-54 mm, and the main grids are parallel to the short sides of the cells, and the widths of the main grids are 0.4-0.7 mm.

2. The solar cell photovoltaic module according to claim 1, wherein spacing between each two adjacent cells is 0-0.5 mm.

3. The solar cell photovoltaic module according to claim 1, wherein the interconnectors comprise cell-to-cell interconnectors and string-to-string interconnectors, wherein the cell-to-cell interconnectors transport currents on the cells along a direction of the main grids, and the string-to-string interconnectors connect parallel cell-to-cell interconnectors in series.

4. The solar cell photovoltaic module according to claim 3, wherein the cell-to-cell interconnectors are arranged parallel to main grids, and the string-to-string interconnectors perpendicularly intersect with the cell-to-cell interconnects and connect the cell-to-cell interconnects intersecting therewith in series.

5. The solar cell photovoltaic module according to claim 4, wherein an end of each cell-to-cell interconnector is a light receiving surface end, and the other end thereof is a back light surface end, the light receiving surface end is connected to one main grid of one cell, the back light surface end is connected to a main grid of a back light surface of another cell, the cell-to-cell interconnector is used to connect two cells in series, and each string-to-string interconnector is welded on the back light surface end.

6. The solar cell photovoltaic module according to claim 3, wherein widths of the cell-to-cell interconnectors are 0.5-0.8 mm, thicknesses thereof are 0.12-0.18 mm, and widths of the string-to-string interconnects are 0.5-6 mm, thicknesses thereof are 0.1-0.4 mm.

7. The solar cell photovoltaic module according to claim 3, wherein the string-to-string interconnectors employ tinned copper tape, conductive tape or transparent conductive film.

8. The solar cell photovoltaic module according to claim 1, wherein a direction parallel to the long sides of the cells is transverse, and a direction parallel to the short sides of the cells is longitudinal, a number of columns of the matrix-arranged cells is 2-6, and a number of rows of the matrix-arranged cells is 5-40.

9. A solar cell photovoltaic assembly comprising more than two solar cell photovoltaic modules according to claim 1 and bus bars for collecting currents of the interconnectors.

10. The solar cell photovoltaic assembly according to claim 9, wherein the solar cell photovoltaic modules are arranged along the long sides of the cells, and the bus bars are parallel to the long sides.

11. The solar cell photovoltaic module according to claim 1, wherein the widths of the main grids are 0.5-0.6 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG. 1 is a structure schematic diagram of a light receiving surface without arranging interconnectors of Embodiment 1;

[0035] FIG. 2 is a structure schematic diagram of a back light surface of a solar cell photovoltaic module of Embodiment 1;

[0036] FIG. 3 is a partial structure schematic diagram of a light receiving surface of the solar cell photovoltaic module of FIG. 2;

[0037] FIG. 4 is a connection schematic diagram between cell-to-cell interconnectors and cells of Embodiment 1;

[0038] FIG. 5 is a structure schematic diagram of a back light surface of a horizontal type solar cell photovoltaic assembly of Embodiment 2;

[0039] FIG. 6 is a structure schematic diagram of a back light surface of a vertical type solar cell photovoltaic assembly of Embodiment 3.

[0040] Wherein:

[0041] 10cell; 21main grid; 22fine grid; 30cell-to-cell interconnector; 31light receiving surface end; 32back light surface end; 33string-to-string interconnector.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0042] The exemplary embodiments of the present disclosure are explained in detail combining with the accompanying drawings so that purposes, features and advantages of the present disclosure can be more obvious and more understandable. It should be noted that the drawings of the present disclosure all adopt simplified forms and all use non-precise proportions, and are only used for the purpose of conveniently and clearly explaining the embodiments of the present disclosure.

Embodiment 1: Solar Cell Photovoltaic Module

[0043] A solar cell photovoltaic module provided by the present disclosure comprises, a plurality of matrix-arranged cells, as shown in FIG. 1, a light receiving surface of each cell 10 is distributed with four longitudinal main grids 21 and 32 transverse fine grids 22, of course, the numbers of the main grids 21 and the fines grids 22 may increase or decrease according to requirement, and the present embodiment only gives an example, and the main grids 21 collect currents on the fine grids 22 connected thereto. The cell 10 is obtained by divided a normal cell evenly along 2 transverse parallel lines, that is, of the normal cell, and is rectangular, wherein a length L1 of a long side thereof is 156.750.25 mm or is selected in the range of 156-160 mm, a length L2 of a short side thereof is 52.250.25 mm or is selected in the range of 31-54 mm, and the widths d of the main grids is 0.5-0.6 mm, and may broadened to 0.4-0.7 mm.

[0044] As shown in FIG. 2, the solar cell photovoltaic module comprises a plurality of matrix-arranged cells 10, a direction parallel to the long sides of the cells 10 is transverse, and a direction parallel to the short sides of the cells 10 is longitudinal, a transverse arrangement, i.e., a number of columns of the matrix of the cells 10 is 6, and a longitudinal arrangement, i.e., a number of rows of the matrix of the cells is 7.

[0045] As shown in FIG. 3, enlarging a partial 22 matrix of the cells, spacing G between each two adjacent cells both in the transverse direction and in the longitudinal direction is 0-0.5 mm. The currents collected by the main grids 21 are transmitted through interconnectors that connect to the main grids 21, and the interconnectors are divided into cell-to-cell interconnectors 30 and string-to-string interconnectors 33.

[0046] As shown in FIG. 4, an end of each cell-to-cell interconnect 30 is a light receiving surface end 31, and the other end thereof is a back light surface end 32, as shown in FIGS. 2-4, the light receiving surface end 31 is directly welded to one main grid 21 of one cell 10 on the right side, the back light surface end 33 is connected to a main grid 21 of a back light surface of another cell 10 on the left side, and the cell-to-cell interconnect 30 is used to connect the two cells in series. The string-to-string interconnectors 33 perpendicularly intersect the cell-to-cell interconnectors 30, and the string-to-string interconnect 33 are welded on the back light surface ends 32, of course, also can be welded on the light receiving surface ends 31, in the present embodiment, material of the string-to-string interconnectors 33 uses tinned copper tapes, and the string-to-string interconnectors 33 are arranged in a density of every three rows, that is, in every other two rows.

[0047] Widths of the cell-to-cell interconnectors 30 are in the range of 0.5-0.8 mm, thicknesses thereof are in the range of 0.12-0.18 mm; widths of the string-to-string interconnectors are in the range of 0.5-6 mm, thicknesses thereof are in the range of 0.1-0.4 mm.

[0048] It should be noted that the string-to-string interconnectors 33 may also use conductive tapes or transparent conductive films, wherein transparent conductive material may interconnected on the back light surface or the light receiving surface, to avoid the influence of the shade by itself. Such a design may be used in a double-sided cell, and may also be used in cell assembly applications such as no main grid process, welding strip process.

[0049] It should be noted that, for the encapsulation of the cells 10 provided in the present disclosure, double glass process and a narrow frame protection can be combined, to utilize the characteristics of high water resistance, such that the potential leakage of the cells 10 can be solved, and using a narrow frame protection, the convenient installation of assembly, low cost and high reliability can be achieved, especially for the technology of double-sided cells, the requirement of the front and back non-shading installation can resolved.

Embodiment 2: Horizontal Solar Cell Photovoltaic Assembly

[0050] As shown in FIG. 5, the horizontal solar cell photovoltaic assembly comprises two solar cell photovoltaic modules 1 arranged side-by-side, that is, arranged along a direction of long sides of the cells 10, and bus bars 4 for collecting currents of the interconnectors, and the bus bars 4 are parallel to the long sides of the cells 10, the two solar cell photovoltaic modules I are connected to a virtual conductive wire 5 via diodes (not shown), and the virtual conductive wire 5 may be a conventional thin bus strip. The virtual conductive wire 5 and the cells 10 are isolated by insulating material. The insulating material may be conventional EPE material or a transparent insulating EPC or a transparent backplane, so as to ensure that the virtual conductive wire 5 does not directly contact the cells 10. A junction box (not shown) is connected with an output through the bus bars 4 and the virtual conductive wire 5, and here, the junction box adopts a three pin structure, and the working current of an employed single duodiode is between 15 A and 20 A.

[0051] The solar cell photovoltaic module 1 in the present embodiment differs from that in Embodiment 1 by that the string-to-string interconnectors 33 are arranged in a density of every two rows, that is, in every other row.

[0052] It is recommended that the double-sided cell assembly uses transparent insulating conductive material and transparent conductive film material. The single-sided cell assembly may directly use non-transparent insulating conductive material and non-transparent conductive film material, directly arranged on the back side.

Embodiment 3: Vertical Solar Cell Photovoltaic Assembly

[0053] As shown in FIG. 6, it differs from Embodiment 2 by that, in the solar cell photovoltaic module 1 is arranged side-by-side, the number of columns of the matrix of the cells 10 is 3, and the row thereof is 20. A vertical solar cell photovoltaic assembly is configured. The string-to-string interconnectors 33 are also arranged in a density of every three rows, that is, in every other two rows.

[0054] It is obvious that those skilled in the art can make various changes or modifications on the present disclosure without depart from scope of the present disclosure. Thus, the present disclosure is also intended to encompass these changes and modifications of the present disclosure which belong to the scope of the claims of the disclosure and equivalents thereof.