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Light reflecting thin film of photovoltaic module and method for fixing light reflecting thin film and soldering strip

A photovoltaic module and fixing method technology, applied in photovoltaic power generation, electrical components, semiconductor devices and other directions, can solve the problems of low product quality rate, reduced cost of reflective tape, complicated process, etc., and achieve simple and flexible fixing steps, low cost, Simple preparation method

Inactive Publication Date: 2013-11-27
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, it is more complicated to press the zigzag texture directly on the PET substrate by hot pressing, and the product quality rate is not high, which restricts the further reduction of the cost of the reflective tape

Method used

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  • Light reflecting thin film of photovoltaic module and method for fixing light reflecting thin film and soldering strip
  • Light reflecting thin film of photovoltaic module and method for fixing light reflecting thin film and soldering strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example of the preparation method of the reflective film: 1) Prepare a 100um thick PET substrate 1, 2) Coat the acrylic liquid on the PET surface, 3) Cover the PET surface with a sawtooth molding mold, fill the acrylic liquid into the grinding In the saw-toothed cavity, 4) Use ultraviolet light to instantly solidify the acrylic to form a triangular reflective prism 2, 5) Load the film substrate forming the reflective prism into the vacuum evaporation machine, with the saw-toothed surface facing the crucible, 6) Put the film substrate with a purity greater than 99.99% high-purity aluminum is loaded into the crucible, 7) vacuumize with a vacuum pump to make the vacuum in the evaporation chamber reach 1.3*10 -2 to 1.3*10 -3 Pa, 8) Heating the crucible to melt the high-purity aluminum wire at 1200°C to 1400°C and evaporate it into gaseous aluminum, 9) Control the moving speed of the film substrate at 300mm / min to 1000mm / min, and control the evaporation time at 1 to 1 5 min...

Embodiment 2

[0046] Example of using the reflective film: 1) Prepare the cells and carry out test classification; 2) Solder one end of the soldering tape to the main grid on the upper surface of the cells at a temperature of 350°C; The reflective film is laid flat on the welding strip on the upper surface of the cell, 4) The position of the reflective film is fixed with a transparent adhesive film, 5) The other end of the welding strip is welded to the main grid on the lower surface of the adjacent cell, 6) Spread a layer of EVA8 (ethylene-vinyl acetate copolymer) on the glass 7, and then spread the welded battery sheet 10, 7) connect the internal circuit of the component, 8) spread another layer of EVA15 and Component backplane 14, 9) Send the laminated components into the laminator, heat the temperature to 142°C for 20 to 30 minutes, 10) carry out the follow-up process of the laminated component according to the conventional method and complete Preparation of components.

[0047] The ou...

Embodiment 3

[0049] Example of how to use the reflective film: 1) Prepare the cells and carry out test binning, 2) Solder one end of the soldering tape to the main grid on the upper surface of the cell at a temperature of 350°C, 3) Lay the components on a flat surface In the glass 7, spread a layer of EVA8 (ethylene-vinyl acetate copolymer) on the glass 7, and then spread the welded battery sheet 10, 4) connect the internal circuit of the component, 8) spread the battery on the battery sheet Another layer of EVA15 and module backplane 14, 5) Paste the luminescent film of the present invention on the area of ​​the module backplane without cells, where the base angles of the prisms are 90 degrees and 30 degrees in the area around the module without cells , and the 30-degree angle is close to the inside of the component. The reflective film in the area between the cell and the cell has a prism bottom angle of 30 degrees. 6) After the stack is completed, each component is sent to the laminator...

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Abstract

The invention discloses a light reflecting thin film of a photovoltaic module and a method for fixing the light reflecting thin film and a soldering strip. The light reflecting thin film of the photovoltaic module comprises a base material, a micro-prism layer and a light reflecting layer. The thickness of the base material ranges from 10 micrometers to 1 millimeter, and the base material comprises plastic base material body and a paper base material body. The micro-prism layer is arranged on the upper surface of the base material, the thickness of the micro-prism layer ranges from 1 micrometer to 500 micrometers, and the micro-prism layer is made of plastic and is of a texture structure. The light reflecting layer is arranged on the upper surface of the micro-prism layer, the thickness of the light reflecting layer ranges from 1 micrometer to 500 micrometers, and the light reflecting layer is made of vacuum nickel plating films or vacuum aluminum plating films or vacuum silver plating films or polyester films coated by high-reflectivity silver or high-reflectivity multilayer dielectric films. The light reflecting thin film is simple in structure and low in cost, the output power of the assembly is increased, the application method of the light reflecting thin film is compatible with an existing photovoltaic module process, and therefore long-term reliability and the service life of the assembly can not be affected. The output power of the photovoltaic assembly can be increased by 1.5% to 3%, and the light reflecting thin film effectively reduces manufacturing cost of the unit power of the photovoltaic module.

Description

technical field [0001] The invention relates to a photovoltaic component reflective film and a fixing method thereof with a welding strip, belonging to the technical field of solar cell components. Background technique [0002] In order to achieve the purpose of outputting the current generated by the photovoltaic cell to the assembly, it is necessary to weld different numbers of ribbons on the surface of the battery sheet, and the ribbons and the main grid on the surface of the battery sheet form a good circuit contact. The current generated by the photovoltaic cells flows through the grid lines on the surface of the battery to the welding strips, and then flows along the welding strips to the outside of the module to drive the load. [0003] In practical applications, in order to reduce the consumption of silver paste, the busbar on the surface of the solar cell can be a discontinuous dot-shaped busbar. This kind of busbar actually increases the light-receiving area of ​​t...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L31/052H01L31/0232
CPCY02E10/52Y02E10/50Y02P70/50
Inventor 刘亚郭志球苏旭平王建华涂浩吴长军彭浩平
Owner CHANGZHOU UNIV
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