Method for encapsulating pervious crystalline silicon solar cell modules

A technology for solar cell components and packaging methods, applied in electrical components, semiconductor devices, circuits, etc., can solve the problems of large equipment investment, long lamination cycle, displacement, etc., to simplify the process, reduce equipment investment, and facilitate application. The effect of promotion

Inactive Publication Date: 2009-09-16
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] Light-transmitting solar cell components are beautiful and have a wide range of applications, but there are still technical bottlenecks in the packaging process. The light-transmitting solar cell components introduced by domestic and foreign photovoltaic companies still cannot compete with ordinary components in terms of production cost, product yield, and product weather resistance. compete with
At present, some companies in Japan and Germany use the glue potting method to encapsulate light-transmitting solar cell components. This process is relatively mature and can produce curved glass components, but the process cost is very high and is not suitable for mass production.
[0003] Ordinary solar cell module lamination encapsulation process is used to encapsulate light-transmitting solar cells. Since rigid glass is used instead of flexible TPE / TPT used in ordinary The extrusion of glass is prone to air bubbles, displacement, solar cell shards, and glass shattering. For this reason, a German component equipment company has launched a lamination equipment with a cooling system, which can solve the problem of bubbles in light-transmitting solar cell components, but The lamination cycle of this process is long, and the investment in equipment is very large
[0004] In recent years, the photovoltaic industry at home and abroad has developed rapidly. Several domestic solar cell module packaging manufacturers are also committed to the research of light-transmitting solar cell module packaging, and have launched light-transmitting solar cell modules at some domestic exhibitions. Some modules have a small amount of air bubbles on the edges. , and the price is high, they have not yet been fully put into the market
[0005] At present, there are also some patents that propose the method of encapsulating light-transmitting crystalline silicon solar cell components using traditional component packaging equipment. For example, in the patent "Encapsulating method of double-sided glass crystalline silicon solar cell Two layers of glass are used to replace the glass-TPE structure to achieve the light transmission effect of the battery components. The patent proposes that the battery structure to be laminated be treated with a specific polymer material before the components are laminated to reduce or even eliminate air bubbles in the components. phenomenon, but did not give specific means of implementation, it is difficult to achieve the expected effect in the implementation process

Method used

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  • Method for encapsulating pervious crystalline silicon solar cell modules

Examples

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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, first place a piece of low-iron tempered glass 3 flat on the table, and spread a single layer of EVA film 2 with a thickness of 0.25mm on it, and place the series-parallel connected solar battery strings 1 on the EVA film 2, A single layer of EVA film 2 with a thickness of 0.25 mm and low-iron tempered glass 3 are also laid in sequence on the solar cell string 1 to form low-iron tempered glass 3-EVA film 2-series-parallel connected solar cells String 1-EVA film 2-low-iron tempered glass 3 five-layer superimposed structure; EVA film 2 is marked with multiple horizontal and vertical marks to reduce unidirectional shrinkage of the EVA film. Then use two layers of polymer polyester film PC to wrap the five-layer superimposed structure. The edge of the PC film needs to exceed the edge of the five-layer superimposed structure; When the board temperature reaches this temperature, put the above-mentioned processed five-layer superimposed structure in...

Embodiment 2

[0028] Such as figure 1 As shown, first place a piece of low-iron tempered glass 3 flat on the table, and lay a single layer of EVA film 2 with a thickness of 0.25mm on it, and place the solar cell strings 1 connected in series and parallel on the EVA film 2, and place them on top of the EVA film 2. Two layers of EVA film 2 with a single layer thickness of 0.25mm and low-iron tempered glass 3 are also stacked in sequence on the solar cell string 1 to form a low-iron tempered glass 3-EVA film 2-series-parallel solar cell string 1-EVA film 2-Five-layer superimposed structure of low-iron tempered glass 3; EVA film 2 is marked with multiple horizontal and vertical lines to prevent unidirectional shrinkage of the EVA film. Then use two layers of polymer polyester film PC to wrap the five-layer superimposed structure. The edge of the PC film needs to exceed the edge of the five-layer superimposed structure; When the plate temperature reaches this temperature, put the above-treated ...

Embodiment 3

[0030] Such as figure 1 As shown, first place a piece of low-iron tempered glass 3 flat on the table, and spread a single layer of EVA film 2 with a thickness of 0.25mm on it, and place the series-parallel connected solar battery strings 1 on the EVA film 2, Three layers of EVA adhesive film 2 with a thickness of 0.25 mm and low-iron tempered glass 3 are also stacked in sequence on the solar cell string 1 to form low-iron tempered glass 3-EVA adhesive film 2-series-parallel solar cells String 1-EVA film 2-low-iron tempered glass 3 five-layer superimposed structure; EVA film 2 is marked with multiple horizontal and vertical lines to avoid unidirectional shrinkage of the EVA film. Then use two layers of polymer polyester film PC to wrap the five-layer superimposed structure. The edge of the PC film needs to exceed the edge of the five-layer superimposed structure; When the plate temperature reaches this temperature, put the above-treated five-layer superimposed structure into t...

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Abstract

The invention discloses a method for encapsulating pervious crystalline silicon solar cell modules, comprising the following steps: upper and lower layers of macromolecular polyester films are arranged at the bottom and top of the solar cell modules featuring five layers of superposed structures, and the margins of the two layers of macromolecular polyester films exceed the margins of the solar cell modules featuring five layers of superposed structures; the preheating temperature of layer presses of the solar cell modules is set at 60-80 DEG C, the five layers of superposed structures are placed in the layer presses, the layer presses are vacuumized until the pressure is lower than 200kPa and the modules are pressurized; the lamination temperature of the layer presses is set at 135-145 DEG C, under which the lamination lasts for 15-25min, after lamination, the layer presses are opened for taking out the molded solar cell modules. The obtained solar cell modules are pervious and beautiful and eliminate bubbles, displacement, solar cell split and glass fragmentation faced by the pervious cell modules in the process of encapsulation.

Description

technical field [0001] The invention relates to a method for encapsulating light-transmitting crystalline silicon solar cell components, which can be used for photovoltaic building integration. Background technique [0002] Light-transmitting solar cell components are beautiful and have a wide range of applications, but there are still technical bottlenecks in the packaging process. The light-transmitting solar cell components introduced by domestic and foreign photovoltaic companies still cannot compete with ordinary components in terms of production cost, product yield, and product weather resistance. compete with each other. At present, some companies in Japan and Germany use the glue potting method to encapsulate light-transmitting solar cell components. This process is relatively mature and can produce curved glass components, but the process cost is very high and is not suitable for large-scale production. [0003] Ordinary solar cell module lamination encapsulation p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 王磊张臻张正国方玉堂高学农
Owner SOUTH CHINA UNIV OF TECH
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