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A kind of solar cell and bus bar

A technology of solar cells and busbars, applied in circuits, electrical components, semiconductor devices, etc., can solve the problems of small effective light-receiving area of ​​the light-receiving surface of solar cells, large shape and area of ​​busbars, and reduced photoelectric conversion efficiency, etc. Photoelectric conversion efficiency, increased surface roughness, the effect of large welding tension

Active Publication Date: 2015-09-09
HAINAN YINGLI NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shape and area of ​​the existing busbars are large, so that the effective light-receiving area of ​​the light-receiving surface of the solar cell is small, which reduces the photoelectric conversion efficiency; more paste is required when printing the busbars, and the production cost is high

Method used

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  • A kind of solar cell and bus bar
  • A kind of solar cell and bus bar
  • A kind of solar cell and bus bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Based on the above ideas, this embodiment provides a solar cell busbar, refer to figure 2 , the busbar 4 is composed of a plurality of busbar segments 5 connected in series. It should be noted that the number of the busbar segments 5 of the busbar 4 can be set according to the ratio of its size to the actual size of the solar cell, figure 2 The three fragments shown in are just structural schematic diagrams and do not represent the actual number. Wherein, the busbar segment 5 is a rectangle, and in order to facilitate the printing preparation of the busbar, the busbar segments are distributed at equal intervals.

[0038] In this embodiment, the busbar 4 of the solar cell is arranged in sections, and the connection between the busbar segment 5 and the busbar segment 5 is connected by a grid line with a smaller width, which reduces the shading of sunlight, thereby The effective light-receiving area is increased, thereby improving the photoelectric conversion efficienc...

Embodiment 2

[0046] Based on the above embodiments and inventive concept, this embodiment provides a structural schematic diagram of a solar cell, refer to Figure 5 , the solar cell includes: a battery body 1, and the battery body includes: a battery body prepared from a polycrystalline silicon wafer; or a battery body prepared from a monocrystalline silicon wafer; Grid lines 2 ; main grid lines 4 arranged above the thin grid lines 2 .

[0047] The main grid lines 4 are electrically connected to the thin grid lines 2 for collecting current in the thin grid lines.

[0048] Figure 5 The busbar structure shown in is only one implementation in the first embodiment, and the busbar structure in actual production may be any one of the busbar structures described in the first embodiment.

[0049] The solar cell described in this embodiment adopts the busbar of the first embodiment, which increases the effective light-receiving area of ​​the solar cell and improves the photoelectric conversion ...

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Abstract

The invention discloses a solar cell and a main gate line thereof. The main gate line is provided with a plurality of segments and is formed by connection of a plurality of main gate line segments in series; wherein a hollow structure is adopted by the main gate line segments. Since the main gate line is provided with a plurality of segments and the segments are hollow in the solar cell with the main gate line structure, the area of the main gate line can be reduced greatly, the consumption of slurry and the shading of the light receiving surface of the solar cell can also be reduced, thus the production cost can be further decreased, and the photoelectric conversion efficiency can be increased. Moreover, by adopting the hollow structure, the surface roughness of the main gate line segments of the main gate line can be increased, and the welding tension between the main gate line and a welding zone can be increased. Therefore, the solar cell with the main gate line structure has large welding tension, the production cost can be reduced, and the photoelectric conversion efficiency can be improved.

Description

technical field [0001] The present invention relates to the technical field of photovoltaic power generation, and more specifically, relates to a solar cell and a main grid line thereof. Background technique [0002] Solar cells are a major form of solar power generation, and solar cells made of crystalline silicon are the mainstream of the photovoltaic power generation industry today. Silicon wafers are prepared into a solar cell through processes such as texturing, diffusion and junction, etching, silicon-phosphorus glass removal, electrode printing, and sintering. After the plurality of solar cells are packaged in series, they cooperate with the controller to become a photovoltaic module with relatively large output power. [0003] Printing electrodes is a key link in the production of solar cells. Generally, the screen printing process is used to form the positive electrode and the back electrode on the front and back of the silicon wafer. Wherein, the positive electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224
Inventor 朱志文吴卫平
Owner HAINAN YINGLI NEW ENERGY