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Manufacturing method of silicon heterojunction solar cell assembly

A solar cell module and silicon heterojunction technology, which is applied in the field of solar cells, can solve the problems of affecting the microstructure of amorphous silicon, deteriorating the passivation effect of heterojunction solar cells, and adversely affecting the conversion efficiency of silicon heterojunction solar cells. , to reduce the production cost, improve the passivation effect, and improve the conversion efficiency.

Inactive Publication Date: 2020-09-25
ZHONGWEI NEW ENERGY CHENGDU CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In the process of solar cell module preparation, it is necessary to use welding to connect cells in series and parallel, and the welding temperature will reach 180°C-350°C. Such a high welding temperature will affect the microstructure of amorphous silicon and deteriorate the quality of heterojunction solar cells. Passivation effect; the lamination process is also used in the preparation of the components. It is laminated at a high temperature of 140°C-160°C for 10min-20min to complete the lamination and packaging of the components. Such a long high-temperature process also affects silicon heterogeneity. Adverse effects on the conversion efficiency of mass junction solar cells

Method used

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  • Manufacturing method of silicon heterojunction solar cell assembly
  • Manufacturing method of silicon heterojunction solar cell assembly
  • Manufacturing method of silicon heterojunction solar cell assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a method for manufacturing a silicon heterojunction solar cell module, comprising the following steps:

[0031] (1) Preparation of silicon heterojunction solar cells;

[0032] The silicon heterojunction solar cell includes an N-type silicon heterojunction solar cell on the front side and a P-type silicon heterojunction solar cell on the front side. The back is followed by: front metal grid electrode, transparent conductive oxide (TCO) layer, N-type amorphous silicon layer (n-α-Si:H), intrinsic amorphous silicon layer (i-α-Si:H) , N-type crystalline silicon (C-Si), intrinsic amorphous silicon layer (i-α-Si:H), P-type amorphous silicon layer (p-α-Si:H), transparent conductive oxide (TCO) Layer, back metal grid line electrode; the front side is P-type silicon heterojunction solar cell and the above sequence is reversed, no more details, the cell structure can refer to figure 1 .

[0033] (2) Connect silicon heterojunction solar cells in series a...

Embodiment 2

[0042] The difference between this example and Example 1 is that light injection is performed after the preparation of the silicon heterojunction solar cell in step (1), and the light injection is at a temperature of 50-250°C and a light intensity of 0.1-80 solar rays Strong, illumination time 1-600s, light source spectral range 200-2000nm, LED light source adopts one of white light, infrared light and ultraviolet light. This step can improve the passivation effect of the amorphous silicon layer on the amorphous silicon during the preparation process of the solar cell, and improve the conversion efficiency of the solar cell.

Embodiment 3

[0044] The difference between this embodiment and Embodiment 1 is that in the lamination process of the step (4): the lamination heating temperature is controlled at 155° C., the lamination time is 20 minutes, and the light intensity of the LED light source used at the same time is 70 The sunlight is strong, and the LED light source uses infrared light.

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Abstract

The invention discloses a manufacturing method of a silicon heterojunction solar cell assembly, solves the problem of degradation of passivation effect and conversion efficiency of a solar cell due towelding and lamination high temperature, and belongs to the technical field of solar cells. The method comprises the following steps of (1) preparing a silicon heterojunction solar cell; (2) carryingout series-parallel connection on the silicon heterojunction solar cells to form a silicon heterojunction solar cell string; (3) laying an assembly packaging material to form a stack; (4) putting thestack into a laminating machine, laminating by taking an LED light source as a heating source to prepare the assembly, and obtaining the silicon heterojunction solar cell assembly after lamination. According to the invention, the LED light source is used as the lamination heating source, the light injection treatment of the silicon heterojunction cell at high temperature is completed in the process of laminating the assembly, the passivation effect of the amorphous silicon on the heterojunction solar cell is remarkably improved, the conversion efficiency of the solar cell is improved, the output power of the solar cell assembly is increased, and meanwhile heating is fast, the efficiency is high, and the energy consumption is low.

Description

technical field [0001] The invention discloses a method for manufacturing a silicon heterojunction solar cell assembly, which belongs to the technical field of solar cells, and in particular relates to the manufacturing technology of a solar cell assembly. Background technique [0002] With the development of economy and society, the extensive use of conventional fossil energy has led to serious environmental pollution problems. The development and utilization of clean energy has become a consensus among people. Since solar energy is inexhaustible, clean and pollution-free, it is the most ideal and sustainable renewable energy in the future. Solar cells directly convert light energy into electrical energy, which is an important way to utilize solar energy. At present, the most commonly used solar cells are based on silicon wafers, which are formed by cleaning texture, PN junction preparation, anti-reflection film preparation, and metal electrode preparation. In order to us...

Claims

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Application Information

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IPC IPC(8): H01L31/074H01L31/18H01L31/048H01L31/05
CPCH01L31/074H01L31/1876H01L31/1868H01L31/0481H01L31/0504Y02E10/50Y02P70/50
Inventor 韩安军刘正新孟凡英张丽平石建华杜俊霖陈红元李金萍周华谢毅
Owner ZHONGWEI NEW ENERGY CHENGDU CO LTD
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