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A kind of solar cell, assembly and manufacturing method thereof

A technology of solar cells and components, applied in the field of solar cells, can solve the problems of battery current hot spots, unsightly appearance, broken grids, etc., and achieve the effects of reducing the use of materials, avoiding damage, and reducing costs

Active Publication Date: 2016-03-16
HENGSHUI YINGLI NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are thin grid lines exposed on the front of the solar cell. During the production and printing process, grid breaks often occur, resulting in hot spots on the battery current (black spots appear in the EL test), and it is not beautiful enough.

Method used

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  • A kind of solar cell, assembly and manufacturing method thereof
  • A kind of solar cell, assembly and manufacturing method thereof
  • A kind of solar cell, assembly and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 1-3 As shown, a solar cell includes a battery body 1, the battery body 1 includes a battery PN junction part 2 and a back electric field part 3, and a front electrode 4 and a grid line 6 are provided on the front side of the battery body 1. The back side of the battery body 1 is provided with a back electrode 5, the front electrode 4 is located at the edge of the upper surface of the battery body 1, the front electrode 4 is a long strip with four strips, and the front electrode 4 is connected end to end to form a frame shape. The gate lines 6 are provided with a plurality of and are cross-connected to each other, the gate lines 6 are located inside the frame-like structure enclosed by the front electrodes 4, and both ends of the gate lines are respectively connected to the front electrodes. Preferably, the grid lines 6 are connected to each other in a crisscross pattern, the front electrode 4 is electrically connected to the grid line 6, and the back elec...

Embodiment 2

[0044] Such as Figure 4 As shown, the difference between this embodiment and the first embodiment lies in the structure of the front electrode, and the remaining features are the same. In this embodiment, the front electrode 4 has a square shape and has four pieces, which are respectively located at the four corners of the upper surface of the battery body 1. The grid lines 6 include thick grid lines 61 and thin grid lines 62. The width of the front electrode 4 is half the width of the front electrode 4, and the front electrode 4 is connected by a thick grid line 61, and the thin grid line 62 is located inside the frame structure formed by the front electrode 4 and the thick grid line 61. The electrodes or thick grid lines are distributed around the cell, which is conducive to the collection of charge around the edge of the cell (the cross section of the pn junction), which can greatly reduce the leakage current and improve the battery life.

[0045] The manufacturing method of ...

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PUM

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Abstract

The invention discloses a solar cell and assembly and a manufacturing method thereof and relates to the technical field of solar cells. The solar cell comprises a cell body, and the cell body comprises a cell PN junction portion and a back field portion. The solar cell is characterized in that the front surface of the cell body is provided with front surface electrodes and grid wires, the back surface of the cell body is provided with back electrodes, wherein the four front surface electrodes are arranged on the four corners or four edges of the top surface of the cell body, the grid wires are connected is a mutually crossed mode, the front surface electrodes are electrically connected with the grid wires, and the four back surface electrodes are arranged on the four corners and the four edges of the bottom surface of the cell body. The assembly manufactured from the solar cell can be welded in any directions for usage, avoid heat spots due to grid breakage, achieve good oxidation resistance, improve resistance to PID (potential induced decay), reduce leakage current, and be high in utilization rate, convenient to use and low in cost.

Description

Technical field [0001] The present invention relates to the technical field of solar cells, in particular to a solar cell and a manufacturing method thereof, and a solar cell component composed of the solar cell. Background technique [0002] Solar cells are products that convert solar energy into electrical energy and are the main components of photovoltaic modules. In order to ensure the absorption of sunlight and draw current with greater efficiency, the metal lines of the network structure formed on the front of the solar cell (facing the sunlight) are called grid lines, and are generally divided into main grid lines and thin grid lines. The back side of the solar cell (the side facing the sunlight) forms a back electric field to fully draw current. At the same time, to facilitate welding, a metal back electrode is printed on the back electric field, which generally corresponds to the same number of main grid lines. [0003] Plasma-enhanced chemical vapor deposition (PECVD) is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224H01L31/042H01L31/18
CPCH01L31/022425H01L31/188Y02E10/50Y02P70/50
Inventor 高艳杰
Owner HENGSHUI YINGLI NEW ENERGY