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Orthohexagnal MWT solar half-cell, assembly and arrangement method

A solar cell and regular hexagon technology, applied in the field of solar cells, can solve the problems of large current collected by thin grid lines, long distance between thin grid lines and holes, and high heat loss of thin grid lines, so as to reduce cutting losses and reduce Environmental pollution and waste of resources, the effect of improving the utilization rate

Pending Publication Date: 2019-03-29
ZHEJIANG JINGSHENG MECHANICAL & ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing MWT solar cells eliminate the shielding of the main grid lines to the light-receiving surface and improve the photoelectric conversion efficiency to a certain extent, the number of conductive vias is small, resulting in too long a distance between the thin grid lines and the holes. The current collected by the root thin grid line is relatively large, which causes excessive heat loss on the thin grid line

Method used

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  • Orthohexagnal MWT solar half-cell, assembly and arrangement method
  • Orthohexagnal MWT solar half-cell, assembly and arrangement method
  • Orthohexagnal MWT solar half-cell, assembly and arrangement method

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Embodiment 1

[0029] Such as figure 1 As shown, the regular hexagonal MWT solar cell proposed by the present invention has a total of 48 lattice holes. In the middle area, laser scribing can be done along one of the longest diagonal lines, or along the sag of one of the opposite sides. Line laser scribing to form two symmetrical MWT solar cell halves 9 .

[0030] The encapsulation loss of solar cell components includes electrical loss and optical loss. In the regular hexagonal MWT solar cell half-cell module proposed by the present invention, the cells are connected by conductive glue and copper foil on the conductive backplane, so the electrical loss includes the mismatch loss of the cells, the resistance of the fine grid wires on the front Loss, resistive loss on conductive glue and conductive copper foil, etc. Since there is no soldering tape, the electrical loss is smaller. For the half-chip, the current is further reduced, so that the electrical losses are further reduced. The half ...

Embodiment 2

[0041] Such as Figure 4 As shown, the present invention also discloses an arrangement scheme of a regular hexagonal MWT solar cell and a half sheet to form a module, which is characterized in that it can be used Figure 5 The assumed basic unit 9 is combined, and the regular hexagon 10 formed by the assumed basic unit is replaced by a whole piece, so that a regular hexagonal MWT solar cell module can be formed.

[0042] Table 1

[0043]

[0044]

[0045]As shown in Table 1, the advantage of the arrangement scheme of regular hexagonal MWT solar cells and half sheets to form modules is that compared with regular hexagonal regular modules, using half sheets and full sheets to form MWT solar cell modules can reduce Cutting loss, while greatly reducing the blank gap area of ​​the module, the effective area ratio of the module, the efficiency of the module and the power per unit area of ​​the module are significantly improved; compared with the conventional MWT module, altho...

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Abstract

The invention relates to the technical field of solar cells, in particular to an orthohexagnal MWT (Metal Wrap Through) solar half-cell, an assembly and an arrangement method. The orthohexagnal MWT solar half-cell is formed by halving or quartering an orthohexagnal solar cell by slicing. A number of lattice holes are evenly distributed in the light receiving surface of the half-cell. The MWT solarhalf-cell assembly utilizing the half-cell includes solar half-cells and a packaging assembly. In the method for arranging MWT solar half-cells, the total number of the MWT solar half-cells is M*(2*N+2). The utilization rate of silicon wafers is improved. The cost of making solar cells is saved. Environmental pollution and resource waste are reduced. The output power of solar cells is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a regular hexagonal MWT solar cell half sheet, assembly and arrangement method. Background technique [0002] At present, to further develop the solar cell industry, the primary problem to be solved is to reduce the cost of using solar cells. The traditional solar cells are square, but the silicon wafers used to make solar cells are circular, and part of the silicon wafers will be wasted during cutting. However, making solar cells into regular hexagons has a higher utilization rate of silicon wafers, making Reduce costs. Cells need to be packaged into photovoltaic modules before they can be used for power generation. The packaged solar cell modules have higher power output and can withstand the damage of the external natural environment. [0003] Because regular hexagonal cells cannot be directly arranged into rectangular modules, the conventional method is to cut the used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042H01L31/048H01L31/02H01L31/0224
CPCH01L31/02H01L31/022441H01L31/042H01L31/048Y02E10/50
Inventor 沈文杰姚桂华曹建伟傅林坚祝广辉姜元涛董医芳谢文
Owner ZHEJIANG JINGSHENG MECHANICAL & ELECTRICAL
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