WO2012133973A1 - Solar cell module and method for manufacturing same - Google Patents

Solar cell module and method for manufacturing same Download PDF

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Publication number
WO2012133973A1
WO2012133973A1 PCT/KR2011/002642 KR2011002642W WO2012133973A1 WO 2012133973 A1 WO2012133973 A1 WO 2012133973A1 KR 2011002642 W KR2011002642 W KR 2011002642W WO 2012133973 A1 WO2012133973 A1 WO 2012133973A1
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solar cell
cell module
light
polyethylene
condensing
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PCT/KR2011/002642
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French (fr)
Korean (ko)
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박병철
황보철
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코오롱글로텍주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0236—Special surface textures
    • H01L31/02366—Special surface textures of the substrate or of a layer on the substrate, e.g. textured ITO/glass substrate or superstrate, textured polymer layer on glass substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/0543—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the refractive type, e.g. lenses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Definitions

  • the present invention relates to a solar cell module and a method for manufacturing the same, and more particularly, to a solar cell module and a method for manufacturing the same that can increase the light collection efficiency.
  • a solar cell is a device using a photoelectric effect that converts light into electrical energy
  • a solar light collector is a solar cell installed in a small area. It is a technique for achieving a high light condensing effect by condensing.
  • the solar cells used in the photovoltaic power generation constitute the heart of a photovoltaic system that directly converts the energy of sunlight into electricity, and is a semiconductor of monocrystalline or polycrystalline or amorphous silicon, organic materials, and compounds (CdTe, CIGS). Is prepared from. In the structure, in order to arrange the solar cell elements in series or in parallel, and to protect the cells over a long period (about 20 years), various packaging is performed and unitized. Is called a solar cell module.
  • the solar cell module covers the surface hit by sunlight with a glass surface, and fills the gap with an encapsulant composed of thermoplastic (especially, ethylene-vinylacetate copolymer, EVA), and the rear surface is heat and weather resistant. It has a configuration protected by a backsheet made of plastic.
  • thermoplastic especially, ethylene-vinylacetate copolymer, EVA
  • the amount of electricity generated in the solar cell module is proportional to the amount of light. Therefore, in order to increase the efficiency of the solar cell module, a structure capable of concentrating light as much as possible by minimizing the loss caused by the reflection of light by absorbing light incident to the front of the solar cell toward the solar cell as much as possible.
  • the structure of the solar cell module of the present invention consists of a light trapping layer, an encapsulant, a solar cell and a back sheet.
  • the front sheet is a material that becomes a light trapping layer in which the condensing protrusions are formed, and the condensing protrusions are formed on the surface of the front sheet due to the compression of the mold to form the light trapping layer.
  • the front sheet constituting the light trapping layer is preferably made of a polymer resin.
  • the encapsulant allows solar light to pass through the solar cell and protects the solar cell from the outside.
  • the encapsulating material is not particularly limited, and an EVA (Ethylene-vinyl acetate) polymer resin, which is usually used as an encapsulating material, may be used.
  • the EVA film is a film excellent in transparency, buffering property, tensile strength, elasticity, waterproof.
  • polyethylene, polycarbonate, polystyrene, polyethylene terepthhalate, polyethylene naphthalate and polyvinyl butyral may be used.
  • Example 1 Table 1 division Total transmittance (%) Scattering degree (%) Scattering Transmission Rate (%) Parallel transmittance (%)
  • Example 1 91.20 61.72 56.29 34.91
  • Example 2 90.08 55.56 50.05 40.03
  • Example 3 93.40 76.63 69.85 22.46
  • Example 4 90.53 58.75 53.19 37.34 Comparative Example 1 88.59 11.62 10.29 78.30

Abstract

The present invention provides a solar cell module and a method for manufacturing same, the solar cell module comprising the steps of: preparing a mold for forming a light collection protrusion; laminating a rear surface sheet, an encapsulation material, a solar cell, an encapsulation material, and a front surface sheet, in the respective order; and laminating the module pressed through the mold and laminated thereby, and the present invention forms a light capturing layer by forming the light collection protrusion on the front surface sheet through the mold.

Description

태양전지 모듈 및 이의 제조방법Solar cell module and manufacturing method thereof
본 발명은 태양전지 모듈 및 이의 제조방법에 관한 것으로 보다 상세하게는 집광효율을 높일 수 있는 태양전지 모듈 및 이의 제조방법에 관한 것이다.The present invention relates to a solar cell module and a method for manufacturing the same, and more particularly, to a solar cell module and a method for manufacturing the same that can increase the light collection efficiency.
화석 연료의 소비량의 증대는 대기 중의 이산화탄소의 증가를 가져오고, 이로 인한 온실 효과에 의하여 지구의 기온이 상승하며, 지구 환경에 중대한 영향을 미치게 된다. Increasing the consumption of fossil fuels leads to an increase in atmospheric carbon dioxide, resulting in an increase in global temperature due to the greenhouse effect and a significant impact on the global environment.
이러한 화석 연료의 고갈화나 지구 온난화 등의 에너지, 환경 문제에 대한 해결책으로 태양에너지 등의 자연 에너지를 이용하는 기술의 개발이 급속도로 진행되고 있다.As a solution to energy and environmental problems such as depletion of fossil fuel, global warming, and the like, development of technology using natural energy such as solar energy is rapidly progressing.
특히, 태양에너지를 이용하는 기술로는 태양전지와 태양광 집광기가 개발되고 있는데 태양전지는 광을 전기에너지로 변화시키는 광전효과를 이용하는 소자이고, 태양광 집광기는 좁은 면적에 설치된 태양전지로 태양광을 집광하도록 하여 고효율의 집광 효과를 달성하기 위한 기술이다.In particular, solar cells and solar light collectors are being developed as a technology using solar energy. A solar cell is a device using a photoelectric effect that converts light into electrical energy, and a solar light collector is a solar cell installed in a small area. It is a technique for achieving a high light condensing effect by condensing.
태양광발전은 태양광으로부터 전기를 생산하는 무한 청정 발전기술로서, 태양광을 받아 전기를 발생하는 태양전지(모듈)와 발생된 직류 전기를 교류로 변환시키는 전력조절 장치 및 주간에 생성된 전기를 저장하는 축전지 등의 주변장치(BOS: Balance of system)로 구성된다.Photovoltaic power generation is an endless clean power generation technology that generates electricity from sunlight. Solar cells (modules) that generate electricity by receiving sunlight and power control devices that convert generated direct current electricity into alternating current and electricity generated during the day It consists of a balance of system (BOS) such as a storage battery.
이러한 태양광 발전에 사용되는 태양전지는 태양광의 에너지를 직접 전기로 바꾸는 태양광 발전 시스템의 심장부를 구성하고, 단결정 또는 다결정 또는 비정질 실리콘(amorphous silicon)계, 유기물, 화합물(CdTe, CIGS)의 반도체로부터 제조된다. 그 구조로는 태양전지 소자를 직렬 또는 병렬로 배치하고, 장기간(약 20년)에 걸쳐 셀(cell)을 보호하기 위하여, 여러 가지 팩키징(packaging)이 수행되고, 유닛화되는데 이 유닛(unit)을 태양전지 모듈이라 한다.The solar cells used in the photovoltaic power generation constitute the heart of a photovoltaic system that directly converts the energy of sunlight into electricity, and is a semiconductor of monocrystalline or polycrystalline or amorphous silicon, organic materials, and compounds (CdTe, CIGS). Is prepared from. In the structure, in order to arrange the solar cell elements in series or in parallel, and to protect the cells over a long period (about 20 years), various packaging is performed and unitized. Is called a solar cell module.
일반적으로 상기 태양전지 모듈은 태양광이 부딪히는 면을 유리(glass) 면으로 덮고, 열가소성 플라스틱(특히, 에틸렌-비닐아세테이트 공중합체, EVA)으로 구성되는 봉지재로 간격을 메우며, 이면은 내열, 내후성 플라스틱으로 이루어진 백시트로 보호하는 구성을 갖는다.In general, the solar cell module covers the surface hit by sunlight with a glass surface, and fills the gap with an encapsulant composed of thermoplastic (especially, ethylene-vinylacetate copolymer, EVA), and the rear surface is heat and weather resistant. It has a configuration protected by a backsheet made of plastic.
상기 태양전지 모듈에서 생성되는 전기량은 빛의 양에 비례한다. 따라서, 태양전지 모듈의 효율을 높이기 위해서는 태양전지의 전면으로 입사되는 빛을 최대한 태양전지 쪽으로 흡수되게 하여 빛의 반사에 의한 손실을 최소화시켜 빛을 최대한 집광할 수 있는 구조가 필요하다.The amount of electricity generated in the solar cell module is proportional to the amount of light. Therefore, in order to increase the efficiency of the solar cell module, a structure capable of concentrating light as much as possible by minimizing the loss caused by the reflection of light by absorbing light incident to the front of the solar cell toward the solar cell as much as possible.
일반적으로 태양전지 모듈은 태양전지를 둘러싼 봉지재를 유리 등의 투명한 물질로 감싸 내부를 보호하는 것이 일반적이다. 이 경우 유리 등의 투명한 물질은 별도의 과정으로 제조한 후에 봉지재와 접착 등의 방법으로 결합하는 방식으로 제조된다.In general, the solar cell module is generally protected by encapsulating the encapsulant surrounding the solar cell with a transparent material such as glass. In this case, the transparent material such as glass is manufactured in a separate process, and then manufactured by bonding the encapsulant and the bonding method.
대한민국공개특허 제2009-0003570호는 굴절유리를 이용한 태양전지 모듈에 관한 것으로 표면에 요철구조를 갖는 굴절유리를 포함하여 에너지 효율을 개선시킨 태양전지 모듈을 제공함으로써, 빛이 굴절유리로 수직 입사하게 됨에 따라 태양광 전지의 에너지 효율이 상승하게 되고 더 많은 전기의 생산이 가능하게 하는 효과가 있다.Korean Patent Laid-Open Publication No. 2009-0003570 relates to a solar cell module using refractive glass, and includes a refractive glass having an uneven structure on its surface to provide a solar cell module with improved energy efficiency, so that light is incident vertically into the refractive glass. As a result, the energy efficiency of the photovoltaic cell is increased and the production of more electricity is possible.
또한, 일본 공개특허 제2003-188394호는 태양전지용 필름 및 태양전지 모듈에 관한 것으로 필름 혹은 그 부분을 갖는 층이 요철구조를 가진 빛 가두기 형상을 하고 있는 것을 특징으로 하는 셀부분에 적층용의 태양전지 필름을 제공하는 것을 특징으로 한다. 상기 특허에 따른 모듈은 태양전지에 입사한 빛을 되풀이하고 내부에 재입사시킬 수 있고 변환 효율을 높일 수 있다.In addition, Japanese Laid-Open Patent Publication No. 2003-188394 relates to a solar cell film and a solar cell module, wherein a layer having a film or a portion thereof has a light trapping shape having an uneven structure. It is characterized by providing a battery film. The module according to the patent can repeat the light incident on the solar cell and re-incident to the inside can increase the conversion efficiency.
그러나, 상기 특허들은 요철 구조를 갖는 굴절유리 부분 또는 필름을 별도의 과정으로 제조하여 봉지재와 접착 등의 방식으로 결합하는 방식으로 제조되어 생산성이 떨어지는 문제점이 있었다.However, the patents have a problem in that productivity is decreased by manufacturing the refractive glass part or the film having the uneven structure by a separate process and bonding the encapsulant and the adhesive method.
또한 상기의 유리대신 유연한 필름을 사용할 경우 라미네이션 공정에서의 기포발생과 평활도가 떨어지는 문제점이 있었다.In addition, when using a flexible film instead of the glass there was a problem in the bubble generation and smoothness in the lamination process.
따라서, 집광효율이 높은 태양전지 모듈의 제조하되, 생산성이 향상될 수 있는 태양전지 모듈의 개발이 소망되었다.Therefore, while manufacturing a solar cell module with high light collection efficiency, it has been desired to develop a solar cell module that can improve productivity.
상기와 같은 문제점을 해결하기 위해서 본 발명의 목적은 태양전지 모듈을 제조하는 데 있어 제조를 간단한 방법으로 대량 생산이 가능하도록 하는 데 있다.In order to solve the above problems, an object of the present invention is to enable mass production in a simple manner in manufacturing a solar cell module.
본 발명의 다른 목적은 집광 및 확산을 통하여, 높은 광포획 효과로 인해 많은 전기를 생산하도록 하는 데 있다.Another object of the present invention is to collect a large amount of electricity through the light trapping effect, through the light collecting and diffusion.
또한 본 발명의 다른 목적은 유리대신 유연한 필름을 사용하여 라미네이션 공정을 하는 동안 모듈의 평활동를 개선하고 기포발생을 최소화 하는데 있다.Another object of the present invention is to improve the smoothness of the module during the lamination process using a flexible film instead of glass and to minimize bubble generation.
상기 목적을 달성하기 위해 본 발명은 태양전지 모듈에 있어서, 태양 광을 투과시켜 빛을 집광시키는 광포획층; 태양 광에 의해 전력을 생산하는 다수 개의 태양전지; 상기 태양광이 통과되어 태양전지에 도달하게 하고 외부로부터 태양전지를 보호하는 봉지재; 및 태양전지를 보호하고 뒷면에서 태양 광을 반사하여 발전 효율을 높이는 후면 시트를 포함하되, 상기 광포획층은 고분자 수지로 이루어지며 집광돌기를 형성하는 것을 특징으로 하는 태양전지 모듈을 제공한다.In order to achieve the above object, the present invention provides a solar cell module comprising: a light capture layer for condensing light by transmitting sunlight; A plurality of solar cells producing power by solar light; An encapsulant which allows the solar light to pass through to reach the solar cell and protects the solar cell from the outside; And a rear sheet that protects the solar cell and reflects sunlight from the rear to increase power generation efficiency, wherein the light trapping layer is made of a polymer resin and forms a condensing protrusion.
또한 본 발명은 상기 집광돌기가 다각뿔형상, 원뿔형상, 절두 다각뿔형상, 절두 원뿔형상인 것을 특징으로 하는 태양전지 모듈을 제공한다.In another aspect, the present invention provides a solar cell module, characterized in that the condensing projection is a polygonal cone shape, cone shape, truncated polygonal cone shape, truncated cone shape.
또한 본 발명은 상기 집광돌기가 절두 팔각뿔형상인 것을 특징으로 하는 태양전지 모듈을 제공한다.In another aspect, the present invention provides a solar cell module, characterized in that the condensing projections are truncated octagonal pyramidal shape.
또한 본 발명은 상기 집광돌기의 밑면의 길이(L)가 50 ~ 500㎛이며, 집광돌기의 높이(H)가 30 ~ 200㎛인 것을 특징으로 하는 태양전지 모듈을 제공한다.In another aspect, the present invention provides a solar cell module, characterized in that the length (L) of the bottom surface of the condensing projection is 50 ~ 500㎛, the height (H) of the condensing projection is 30 ~ 200㎛.
또한 본 발명은 상기 광포획층이 폴리이서술폰(polyestersulfone), 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate), 폴리부틸렌 테레프탈레이트(polybutylene terepthalate), 황화 폴리페닐렌(polyphenylene sulfide), 폴리프로필렌(polypropylene), 아라미드(aramid), 폴리아미데마이드(polyamideimide), 폴리이미드(polyimide), 아로마틱폴리이미드(aromaticpolyimide), 폴리에테르이미드(polyetherimide), 폴리비닐리덴 플로라이드(polyvinylidene fluoride), 아크릴로니트릴 부타딘 스티렌(acrylonitrile butadienestyrene), 에틸렌 테트라플루오로에틸렌(Ethylene Tetrafluoroethylene) 및 염화 폴리비닐(polyvinyl chlorides) 등으로 이루어진 군에서 1이상 선택되는 것을 특징으로 하는 태양전지 모듈을 제공한다.In another aspect, the present invention, the light trapping layer is polyestersulfone, polyethylene (polyethyleme), polycarbonate, polystyrene, polystyrene, polyethylene terepthhalate, polyethylene naphthalate (polyethylene naphthalate), polybutyl Polybutylene terepthalate, polyphenylene sulfide, polypropylene, aramid, polyamideimide, polyimide, aromatic polyimide, polyamide In the group consisting of etherimide, polyvinylidene fluoride, acrylonitrile butadienestyrene, ethylene tetrafluoroethylene and polyvinyl chlorides The solar cell module, characterized in that selected above The.
또한 본 발명은 상기 봉지재가 EVA, 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate) 및 폴리비닐부티럴(polyvinyl butyral)로 이루어진 군에서 1이상 선택되는 것을 특징으로 하는 태양전지 모듈을 제공한다.In another aspect, the encapsulant is EVA, polyethylene (polyethyleme), polycarbonate (polycarbonate), polystyrene (polystyrene), polyethylene terepthhalate (polyethylene terepthhalate), polyethylene naphthalate (polyethylene naphthalate) and polyvinyl butyral (polyvinyl butyral) It provides a solar cell module characterized in that at least one selected from the group consisting of.
또한 본 발명은 태양전지 모듈 제조방법에 있어서, 집광돌기를 형성하는 금형 준비단계; 후면시트, 봉지재, 태양전지, 봉지재 및 앞면시트의 순서로 적층하는 단계; 및 상기 금형을 통해 압착하여 적층된 모듈을 라미네이션하는 단계를 포함하되, 상기 금형을 통해 앞면시트에 집광돌기를 형성하여 광포획층을 형성하는 것을 특징으로 하는 태양전지 모듈 제조방법을 제공한다.In another aspect, the present invention provides a method for manufacturing a solar cell module, comprising: a mold preparing step of forming a light collecting protrusion; Stacking the back sheet, the encapsulant, the solar cell, the encapsulant, and the front sheet; And laminating the laminated module by pressing through the mold, provides a solar cell module manufacturing method characterized in that to form a light trapping layer by forming a condensing protrusion on the front sheet through the mold.
또한 본 발명은 상기 집광돌기가 다각뿔형상, 원뿔형상, 절두 다각뿔형상, 절두 원뿔형상인 것을 특징으로 하는 전지 모듈 제조방법을 제공한다.In another aspect, the present invention provides a method for producing a battery module, characterized in that the condensing projection is a polygonal cone shape, cone shape, truncated polygonal cone shape, truncated cone shape.
또한 본 발명은 상기 집광돌기가 절두 팔각뿔형상인 것을 특징으로 하는 태양전지 모듈 제조방법을 제공한다.In another aspect, the present invention provides a method for manufacturing a solar cell module, characterized in that the condensing projection is truncated octagonal pyramidal shape.
또한 본 발명은 상기 집광돌기의 밑면의 길이(L)가 50 ~ 500㎛이며, 집광돌기의 높이(H)가 30 ~ 200㎛인 것을 특징으로 하는 태양전지 모듈 제조방법을 제공한다.In another aspect, the present invention provides a method for manufacturing a solar cell module, characterized in that the length (L) of the bottom surface of the condensing projection is 50 ~ 500㎛, the height (H) of the condensing projection is 30 ~ 200㎛.
또한 본 발명은 상기 광포획층이 폴리이서술폰(polyestersulfone), 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate), 폴리부틸렌 테레프탈레이트(polybutylene terepthalate), 황화 폴리페닐렌(polyphenylene sulfide), 폴리프로필렌(polypropylene), 아라미드(aramid), 폴리아미데마이드(polyamideimide), 폴리이미드(polyimide), 아로마틱폴리이미드(aromaticpolyimide), 폴리에테르이미드(polyetherimide), 폴리비닐리덴 플로라이드(polyvinylidene fluoride), 아크릴로니트릴 부타딘 스티렌(acrylonitrile butadienestyrene), 에틸렌 테트라플루오로에틸렌(Ethylene Tetrafluoroethylene) 및 염화 폴리비닐(polyvinyl chlorides)로 이루어진 군에서 1이상 선택되는 것을 특징으로 하는 태양전지 모듈 제조방법을 제공한다.In another aspect, the present invention, the light trapping layer is polyestersulfone, polyethylene (polyethyleme), polycarbonate, polystyrene, polystyrene, polyethylene terepthhalate, polyethylene naphthalate (polyethylene naphthalate), polybutyl Polybutylene terepthalate, polyphenylene sulfide, polypropylene, aramid, polyamideimide, polyimide, aromatic polyimide, polyamide At least one in the group consisting of etherimide, polyvinylidene fluoride, acrylonitrile butadienestyrene, ethylene tetrafluoroethylene and polyvinyl chlorides Method for manufacturing a solar cell module, characterized in that selected Provided.
또한 본 발명은 상기 봉지재가 상기 봉지재는 EVA, 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate) 및 폴리비닐부티럴(polyvinyl butyral)로 이루어진 군에서 1이상 선택되는 것을 특징으로 하는 태양전지 모듈 제조방법을 제공한다.In addition, the encapsulant is the encapsulant is EVA, polyethylene (polyethyleme), polycarbonate, polystyrene, polyethylene terepthhalate, polyethylene naphthalate and polyvinyl butyral (polyvinyl) butyral) provides a solar cell module manufacturing method characterized in that at least one selected from the group consisting of.
본 발명에 따른 태양전지 모듈 제조방법은 라미네이션 공정중에 집광돌기가 형성된 광포획층이 태양전지 모듈에 일체로 형성될 수 있으므로 제조가 간단하여 대량생산이 가능하다.In the solar cell module manufacturing method according to the present invention, since the light trapping layer in which the condensation protrusions are formed may be integrally formed in the solar cell module during the lamination process, the production is simple and mass production is possible.
또한, 본 발명에 따른 태양전지 모듈은 집광돌기에 의한 집광 및 확산을 통해, 높은 광포획 효과로 인해 많은 전기를 생산할 수 있다.In addition, the solar cell module according to the present invention can produce a lot of electricity due to the high light trapping effect through the light collecting and diffusion by the light collecting projections.
또한, 본 발명에 따른 집광돌기를 형성하는 금형은 유연한 필름의 라미네이션 과정에서 모듈의 평활도를 높이고 기포발생을 억제시켜준다.In addition, the mold forming the light collecting protrusion according to the present invention increases the smoothness of the module in the lamination process of the flexible film and suppresses bubble generation.
도 1은 본 발명의 일실시예에 따른 태양전지 모듈의 단면도를 나타낸 것이다.1 is a cross-sectional view of a solar cell module according to an embodiment of the present invention.
도 2는 본 발명의 일실시예에 따른 태양전지 모듈 중 광포획층의 집광돌기 형상을 나타낸 것이다.Figure 2 shows the shape of the light collecting protrusion of the light trapping layer of the solar cell module according to an embodiment of the present invention.
이하 본 발명에 첨부된 도면을 참조하여 본 발명을 상세히 설명하기로 한다. 우선, 도면들 중, 동일한 구성요소 또는 부품들은 가능한 한 동일한 참조부호를 나타내고 있음에 유의하여야 한다. 본 발명을 설명함에 있어, 관련된 공지기능 혹은 구성에 대한 구체적인 설명은 본 발명의 요지를 모호하지 않게 하기 위하여 생략한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.
본 명세서에서 사용되는 정도의 용어 "약", "실질적으로" 등은 언급된 의미에 고유한 제조 및 물질 허용오차가 제시될 때 그 수치에서 또는 그 수치에 근접한 의미로 사용되고, 본 발명의 이해를 돕기 위해 정확하거나 절대적인 수치가 언급된 개시 내용을 비양심적인 침해자가 부당하게 이용하는 것을 방지하기 위해 사용된다.As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values when manufacturing and material tolerances inherent in the meanings indicated are intended to aid the understanding of the invention. Accurate or absolute figures are used to assist in the prevention of unfair use by unscrupulous infringers.
본 발명은 태양전지 모듈 및 이의 제조방법에 관한 것으로 집광돌기를 형성시키는 금형 준비단계; 후면시트, 봉지재, 태양전지, 봉지재 및 앞면시트의 순서로 적층하는 단계; 및 상기 금형을 통해 압착하여 상기 적층된 후면시트, 봉지재, 태양전지, 봉지재 및 앞면시트를 라미네이션하는 단계를 포함하는 것을 특징으로 한다. 상기 금형을 통해서 앞면시트는 집광돌기를 형성하며, 형성된 집광돌기는 광포획층을 형성하여 집광효율을 높이게 된다.The present invention relates to a solar cell module and a method for manufacturing the same; a mold preparation step of forming a light collecting protrusion; Stacking the back sheet, the encapsulant, the solar cell, the encapsulant, and the front sheet; And laminating the laminated rear sheet, the encapsulant, the solar cell, the encapsulant, and the front sheet by pressing through the mold. The front sheet forms a condensing protrusion through the mold, and the condensing protrusions form a light trapping layer to increase condensing efficiency.
도 1은 본 발명의 일실시예에 따른 태양전지 모듈의 단면도를 나타낸 것이다. 도 2는 본 발명의 일실시예에 따른 광포획층의 표면에 형성되는 집광돌기 형상을 나타낸 것이다.1 is a cross-sectional view of a solar cell module according to an embodiment of the present invention. Figure 2 shows the shape of the condenser projections formed on the surface of the light trapping layer according to an embodiment of the present invention.
일반적으로 태양전지 모듈은 태양전지를 둘러싼 봉지재를 유리 등의 투명한 물질로 감싸 내부를 보호하는 것이 일반적이다. 이 경우 태양전지를 둘러싼 봉지재를 접착하는 과정을 거친 뒤에 양면에 유리 등을 감싸는 과정의 두 단계 이상의 공정을 실시해야 한다. 또한, 집광돌기 등의 형상을 형성하려면 추가적인 공정을 더 실시해야만 한다.In general, the solar cell module is generally protected by encapsulating the encapsulant surrounding the solar cell with a transparent material such as glass. In this case, after bonding the encapsulant surrounding the solar cell, two or more steps of encapsulating glass on both sides should be performed. In addition, in order to form the shape of the condenser, it is necessary to further perform an additional process.
그러나, 본 발명에서는 집광돌기가 포함되어 형상을 형성하면서도 간단한 공정으로 태양전지 모듈을 제조할 수 있다.However, in the present invention, a solar cell module may be manufactured by a simple process while including a condensing protrusion to form a shape.
본 발명의 태양전지 모듈의 구조는 광포획층, 봉지재, 태양전지 및 후면시트로 이루어져 있다.The structure of the solar cell module of the present invention consists of a light trapping layer, an encapsulant, a solar cell and a back sheet.
본 발명의 태양전지 모듈은 상기 광포획층을 태양전지 모듈 제조시에 여러단계의 공정을 거칠 필요없이 일공정에 의해 형성되어 생산공정을 단순화할 수 있는 것이 특징이다.The solar cell module of the present invention is characterized in that the light trapping layer is formed by one step without having to go through several steps in manufacturing the solar cell module, thereby simplifying the production process.
상기 광포획층은 집광돌기가 형성되어 있으며, 집광돌기를 형성시키기 위해서 금형을 준비하여 압착에 의해 집광돌기를 형성한다. 따라서, 금형의 형상에 따라 집광돌기의 형상을 변경할 수 있다. 즉 금형의 형상은 집광돌기의 형상과 동일한 형상이 음각 또는 양각으로 이루어져 있다.The light trapping layer has a light collecting protrusion, and prepares a mold to form the light collecting protrusion and forms the light collecting protrusion by pressing. Therefore, the shape of the condenser can be changed in accordance with the shape of the mold. In other words, the shape of the mold is the same shape as the shape of the condensing projection is made of intaglio or embossed.
한편, 상기 금형의 재질은 특별히 제한되는 것은 아니며, 금속재질로 이루어진 것이 바람직하다. 금속재질로 이루어진 상기 금형은 압착에 의한 라미네이션 공정으로 광포획층의 표면에 집광돌기를 형성하는 것이다. 집광돌기를 형성도록 하는 상기 금형은 필름의 라미네이션 과정에서 모듈의 평활도를 높이고 기포발생을 억제시키는 역할을 할 수 있다.On the other hand, the material of the mold is not particularly limited, it is preferably made of a metal material. The mold made of a metal material forms a light collecting protrusion on the surface of the light trapping layer by a lamination process by pressing. The mold for forming the light collecting protrusion may serve to increase the smoothness of the module in the lamination process of the film and to suppress bubble generation.
필름으로 적층을 통해 태양전지를 제조할 경우에 유리와 다르게 필름은 후면시트와 앞면시트간의 열팽창계수가 상이하여 라미네이션 이후 휨현상이 발생하고 태양광 모듈로서 상품가치가 떨어지는 문제점이 발생한다. 이러한 문제점을 보완하기 위해 동일한 열팽창계수의 물질을 사용하기 위해 상대적으로 가격이 높은 앞면시트를 후면시트로 사용하여야 하는 문제점이 있다. 따라서 본 발명의 금형을 사용하여 라미네이션을 진행할 경우 금형이 진공압축 과정에서 모듈에 일정 압력을 가해주고 열팽창에 따른 휨현상을 막아주는 효과가 있어 평활도를 높여 플렉서블한 모듈의 제조과정에 효과적이다.When manufacturing a solar cell through lamination with a film, unlike a glass, the film has a different thermal expansion coefficient between the rear sheet and the front sheet, resulting in warpage after lamination and a decrease in product value as a solar module. In order to compensate for this problem, there is a problem in that the front sheet having a relatively high price is used as the rear sheet in order to use the same thermal expansion coefficient material. Therefore, when the lamination is performed using the mold of the present invention, the mold exerts a constant pressure on the module in the vacuum compression process and prevents warpage due to thermal expansion, thereby increasing smoothness, which is effective in the manufacturing process of the flexible module.
또한 EVA(Ethylene-vinyl acetate) 등으로 봉지재를 사용할 경우, 라미네이션 과정에서 발생하는 아세트산으로 모듈내에서 기포를 발생하여 모듈의 효율을 저하시키는 문제점이 발생한다. 그러나, 본 발명에서와 같이 금형을 사용하게 될 경우 집광돌기 형성시에 봉지재에서 발생하는 가스의 이동 통로를 제공하고 라미네이션 과정에서 효과적으로 상기 가스가 제거되는 효과가 있다.In addition, when using an encapsulant such as EVA (Ethylene-vinyl acetate), there is a problem that deteriorates the efficiency of the module by generating bubbles in the module with acetic acid generated during the lamination process. However, when the mold is used as in the present invention, there is an effect of providing the gas passageway generated in the encapsulant when forming the condensing protrusion and effectively removing the gas in the lamination process.
상기와 같이 광포획층에 집광돌기를 형성할 수 있는 금형을 준비한 다음, 진공 압착에 의한 라미네이션을 실시하여 일공정으로 태양전지 모듈을 생산할 수 있는 데, 상기 라미네이션을 위해 구성요소들을 적층할 수 있다. 즉, 아래에서부터 차례로 후면시트, 봉지재, 태양전지, 봉지재 및 앞면시트를 적층하고, 그리고 금형을 앞면시트 위에 적층한다.After preparing a mold capable of forming a light collecting protrusion on the light trapping layer as described above, a lamination by vacuum compression may be performed to produce a solar cell module in one step, and components may be stacked for the lamination. . That is, the rear sheet, the encapsulant, the solar cell, the encapsulant and the front sheet are laminated in order from the bottom, and the mold is laminated on the front sheet.
상기 앞면시트는 집광돌기가 형성되는 광포획층이 되는 재료로서, 금형의 압착으로 인해 앞면시트의 표면에 집광돌기가 형성되어 광포획층이 이루어진다.The front sheet is a material that becomes a light trapping layer in which the condensing protrusions are formed, and the condensing protrusions are formed on the surface of the front sheet due to the compression of the mold to form the light trapping layer.
도 2는 본 발명의 일실시예에 따른 태양전지 모듈 중 광포획층의 집광돌기 형상을 나타낸 것이다.Figure 2 shows the shape of the light collecting protrusion of the light trapping layer of the solar cell module according to an embodiment of the present invention.
바람직한 집광돌기의 형상은 다각뿔형상, 원뿔형상, 절두 다각뿔형상 및 절두 원뿔형상인 것이 바람직하다. 또한, 절두 다각뿔형상인 것이 더욱 바람직하다.It is preferable that the shape of the condensing protrusions is a polygonal cone shape, a cone shape, a truncated polygonal cone shape, and a truncated cone shape. Moreover, it is more preferable that it is a truncated polypyramidal shape.
상기 절두 다각뿔형상은 다각의 각도에서 들어오는 빛을 효과적으로 포획할 수 있으며, 이는 추가로 태양광 모듈의 트렉킹(추적장치) 장비가 없어도 되는 효과가 있다. 또한 상부의 절두 부분은 직선으로 들어오는 빛을 통과함과 동시에 측면에서 들어온 빛의 광로길이를 증가시키는 효과가 가장 크다. 특히, 절두 팔각뿔 형상에서는 여러면의 각도에서 들어오는 빛을 효과적으로 포획하기에 적절한 형상이다. 광포획 기능을 증가시킴에 따라 높은 효율로 전기를 생산할 수 있게 된다.The truncated polygonal pyramid shape can effectively capture the light coming from the angle of the polygon, which has the effect that there is no additional tracking device of the solar module. In addition, the truncated portion of the upper part has the greatest effect of increasing the optical path length of the light coming from the side while passing the light coming in a straight line. In particular, the truncated octagonal pyramid shape is a shape suitable for effectively capturing light from various angles. Increasing the light trapping capability enables the production of electricity with high efficiency.
상기 집광돌기를 형성하는 광포획층은 반사광의 양 및 계면에서의 광학적 손실을 최소화시킴과 동시에 산란에 의한 광의 광로길이를 증가시킴으로써 광포획 기능을 증가시킬 수 있다. 광포획층에 형성된 집광돌기를 통해 태양광의 입사각도와 상관없이 더 많은 입사광이 봉지재에 내재한 태양전지로 투과되면, 태양전지는 더 많은 전기를 생산할 수 있다.The light trapping layer forming the light collecting protrusion may increase the light trapping function by minimizing the amount of reflected light and optical loss at the interface and increasing the optical path length of the light due to scattering. When more incident light is transmitted to the solar cell embedded in the encapsulant regardless of the incident angle of the solar light through the condensing protrusion formed on the light trapping layer, the solar cell may produce more electricity.
또한, 상기 집광돌기의 크기는 밑면의 길이(L)는 밑면의 한 변 어느 점에서 직선으로 연결한 길이 중 가장 긴 길이를 밑면의 길이(L)이라 하면, 상기 집광돌기의 밑면의 길이(L)는 50 ~ 500㎛인 것이 바람직하다. 또한, 집광돌기의 높이(H)는 30 ~ 200㎛인 것이 바람직하다.In addition, the size of the condensing protrusion is the length (L) of the bottom surface is the length (L) of the bottom surface of the condensing protrusion, if the longest length of the length connected to the straight line at any point of the bottom surface (L), ) Is preferably 50 to 500 µm. Moreover, it is preferable that the height H of a condensing protrusion is 30-200 micrometers.
상기 범위내에서 집광돌기가 형성될 때, 빛을 효과적으로 산란시키면서 집광하여 광포획 기능을 증가시킨다.When the condensation protrusions are formed within the above ranges, the light condensing function is condensed while effectively scattering light to increase the light trapping function.
또한, 상기 집광돌기가 형성된 광포획층은 표면적을 향상시키고, 빛을 효과적으로 산란시키면서 집광할 수 있다. 상기 집광돌기를 형성하도록 하는 금형은 라이네이팅 공정을 위해 후면시트, 봉지재, 태양전지, 봉지재 및 앞면시트가 놓여진 부분의 상부에 위치하게 된다.In addition, the light trapping layer formed with the light collecting protrusion may improve the surface area and collect light while effectively scattering light. The mold for forming the condensing protrusion is positioned above the rear sheet, the encapsulant, the solar cell, the encapsulant, and the front sheet for the lining process.
금형의 압착에 의해 앞면시트에 형성되는 집광돌기의 형상은 절두 팔각뿔형상을 예로 설명한다. 상기 절두 팔각뿔형상은 팔각뿔 형상에서 상부가 절단된 형상을 뜻한다. 상기 절두 팔각뿔형상의 측면은 사다리꼴 형상이며, 평면은 팔각형 형상이다. 측면에 입사되는 광은 굴절 및 반사로 인해 산란을 일으켜 광로길이를 증가시킴으로써 광포획 기능을 증가시킨다.The shape of the condensing protrusion formed on the front sheet by pressing the mold will be described as a truncated octagonal pyramid. The truncated octagonal pyramid shape refers to a shape in which the upper part is cut from the octagonal pyramid shape. The sides of the truncated octagonal pyramid are trapezoidal in shape, and the plane is octagonal in shape. The light incident on the side causes scattering due to refraction and reflection, thereby increasing the optical path length, thereby increasing the light trapping function.
광포획 기능을 증가시킴에 따라서, 높은 효율로 많은 전기를 생산할 수 있게 되는 것이다.By increasing the light trapping function, it is possible to produce a lot of electricity with high efficiency.
한편, 상기 광포획층을 이루는 앞면시트는 고분자수지로 이루어지는 것이 바람직하다.On the other hand, the front sheet constituting the light trapping layer is preferably made of a polymer resin.
즉, 압착에 의해 형상이 변형되는 것이어야 하므로 유리로 형성될 수는 없고, 형상변형이 자유로운 고분자수지인 것이 바람직하다. 광포획층을 형성할 수 있는 고분자수지의 예로는 폴리이서술폰(polyestersulfone), 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate), 폴리부틸렌 테레프탈레이트(polybutylene terepthalate), 황화 폴리페닐렌(polyphenylene sulfide), 폴리프로필렌(polypropylene), 아라미드(aramid), 폴리아미데마이드(polyamideimide), 폴리이미드(polyimide), 아로마틱폴리이미드(aromaticpolyimide), 폴리에테르이미드(polyetherimide), 폴리비닐리덴 플로라이드(polyvinylidene fluoride), 아크릴로니트릴 부타딘스티렌(acrylonitrile butadienestyrene), 에틸렌 테트라플루오로에틸렌(Ethylene Tetrafluoroethylene) 및 염화 폴리비닐(polyvinyl chlorides) 등으로 이루어진 군에서 1이상 선택될 수 있으나, 이에 한정되는 것은 아니다.That is, since the shape should be deformed by pressing, it cannot be formed of glass, and it is preferable that the shape is free of polymer resin. Examples of the polymer resin capable of forming the light trapping layer include polyestersulfone, polyethylene, polycarbonate, polystyrene, polyethylene terepthhalate, and polyethylene naphthalate. ), Polybutylene terepthalate, polyphenylene sulfide, polypropylene, aramid, polyamideimide, polyimide, aromatic polyimide ( aromaticpolyimide, polyetherimide, polyvinylidene fluoride, acrylonitrile butadienestyrene, ethylene tetrafluoroethylene and polyvinyl chlorides One or more may be selected from the group consisting of, but is not limited thereto. It is not.
본 발명에 의한 태양전지 모듈에서 상기 봉지재는 태양광이 통과하여 태양전지에 도달하게 하며, 외부로부터 태양전지를 보호하는 역할을 한다. 상기 봉지재로는 특별히 제한되는 것은 아니며, 통상적으로 봉지재로 사용되는 EVA(Ethylene-vinyl acetate) 고분자 수지를 이용할 수 있다. 상기 EVA 필름은 투명성, 완충성, 인장강도, 탄성, 방수성이 우수한 필름이다. 이외에도 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate) 및 폴리비닐부티럴(polyvinyl butyral)등을 이용할 수도 있다.In the solar cell module according to the present invention, the encapsulant allows solar light to pass through the solar cell and protects the solar cell from the outside. The encapsulating material is not particularly limited, and an EVA (Ethylene-vinyl acetate) polymer resin, which is usually used as an encapsulating material, may be used. The EVA film is a film excellent in transparency, buffering property, tensile strength, elasticity, waterproof. In addition, polyethylene, polycarbonate, polystyrene, polyethylene terepthhalate, polyethylene naphthalate and polyvinyl butyral may be used.
또한, 후면시트는 방수, 절연 및 태양전지를 보호하며, 후면에서 태양 광을 반사하여 발전 효율을 높이는 역할을 한다. 상기 후면시트의 재질로는 특별히 제한되는 것은 아니나, 앞면시트와 동일한 재료를 사용할 수 있다. 즉, 폴리이서술폰(polyestersulfone), 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate), 폴리부틸렌 테레프탈레이트(polybutylene terepthalate), 황화 폴리페닐렌(polyphenylene sulfide), 폴리프로필렌(polypropylene), 아라미드(aramid), 폴리아미데마이드(polyamideimide), 폴리이미드(polyimide), 아로마틱폴리이미드(aromaticpolyimide), 폴리에테르이미드(polyetherimide), 폴리비닐리덴 플로라이드(polyvinylidene fluoride), 아크릴로니트릴 부타딘스티렌(acrylonitrile butadienestyrene), 에틸렌 테트라플루오로에틸렌(Ethylene Tetrafluoroethylene) 및 염화 폴리비닐(polyvinyl chlorides) 등으로 이루어진 군에서 1이상 선택될 수 있으나, 이에 한정되는 것은 아니다.In addition, the back sheet protects the waterproof, insulating and solar cells, and serves to enhance the power generation efficiency by reflecting sunlight from the back. The material of the rear sheet is not particularly limited, but the same material as the front sheet may be used. That is, polyestersulfone, polyethylene, polycarbonate, polycarbonate, polystyrene, polyethylene terepthhalate, polyethylene naphthalate, polybutylene terepthalate , Polyphenylene sulfide, polypropylene, aramid, polyamideimide, polyimide, aromatic polyimide, polyetherimide, polyether At least one selected from the group consisting of polyvinylidene fluoride, acrylonitrile butadienestyrene, ethylene tetrafluoroethylene, polyvinyl chlorides, and the like, It is not limited.
상기 후면시트, 봉지재, 태양전지, 봉지재 및 앞면시트를 적층하고, 그리고 금형을 앞면시트 위에 적층한 다음, 고온의 압착에 의한 라미네이션 공정을 이용하여 도 1과 같은 구조로 태양전지 모듈이 완성된다. 상기 앞면시트는 금형에 의해 집광돌기가 형성된 광포획층을 형성하게 된다. 상기 라미네이션 공정시 가해지는 열은 130 내지 180℃ 인 것이 바람직하다.The rear sheet, the encapsulant, the solar cell, the encapsulant, and the front sheet are laminated, and the mold is laminated on the front sheet, and the solar cell module is completed in the structure as shown in FIG. 1 by using a lamination process by high temperature compression. do. The front sheet forms a light trapping layer in which a condensation protrusion is formed by a mold. The heat applied during the lamination process is preferably 130 to 180 ℃.
상기의 제조공정으로 제조된 태양전지 모듈은 산란도가 50 내지 80%이며, 산란투과량이 50 내지 70%이다.The solar cell module manufactured by the above manufacturing process has a scattering degree of 50 to 80% and a scattering transmittance of 50 to 70%.
이하, 본 발명의 실시예에 대하여 자세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail.
실시예 1Example 1
먼저, 금속으로 형성된 금형을 형성하는 데, 상기 금형은 절두 정팔각뿔형을 음각으로 형성한다. 다음으로 앞면시트 및 후면시트는 폴리에틸렌(polyethyleme)으로 하고, EVA 필름을 봉지재로 하여, 후면시트, 봉지재, 태양전지, 봉지재 및 앞면시트의 순서로 적층한 다음, 금형을 상기 앞면시트 상에 위치시켜 압착하여 라미네이션 한다. 금형으로 형성된 절두 정팔각형뿔의 집광돌기는 밑면의 길이(L)가 100㎛, 높이(H)는 40㎛로 한다. 상기 라미네이션으로 인해 앞면시트에 절두 정팔각뿔형의 집광돌기가 형성된 광포획층을 형성한 태양전지 모듈을 완성한다.First, a mold formed of metal is formed, which forms a truncated regular octagonal pyramid. Next, the front sheet and the rear sheet are made of polyethylene, the EVA film is used as the encapsulant, and the back sheet, the encapsulant, the solar cell, the encapsulant, and the front sheet are laminated in this order, and then the mold is placed on the front sheet. Lay it by pressing it on the side. The condensing projections of the truncated regular octagonal pyramid formed by the mold have a length L of 100 μm at the bottom and a height H of 40 μm. Due to the lamination, a solar cell module having a light trapping layer in which a condensing protrusion of a truncated octagonal pyramidal shape is formed on the front sheet is completed.
실시예 2Example 2
실시예 1과 동일하게 실시하되, 앞면시트는 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate)를 이용하였으며, 금형으로 형성된 절두 정팔각형뿔의 집광돌기는 밑면의 길이(L)가 500㎛, 높이(H)는 200㎛로 하여 태양전지 모듈을 완성하였다.In the same manner as in Example 1, the front sheet was made of polyethylene terepthhalate (polyethylene terepthhalate), the condensing projection of the truncated octagonal pyramid formed in the mold has a length (L) of the bottom 500㎛, height (H) 200 The solar cell module was completed with the thickness of.
실시예 3Example 3
실시예 1과 동일하게 실시하되, 절두 육각뿔 형상으로 금형을 제조하여 집광돌기를 형성한다. 집광돌기의 밑면의 길이(L)가 50㎛, 높이(H)는 30㎛로 하여 태양전지 모듈을 완성한다.The same process as in Example 1, except that the die is manufactured in the shape of truncated hexagonal pyramid to form a light collecting protrusion. The length L of the bottom surface of the condensing protrusion is 50 µm and the height H is 30 µm to complete the solar cell module.
실시예 4Example 4
실시예 2과 동일하게 실시하되, 절두 육각뿔 형상으로 금형을 제조하여 집광돌기를 형성한다. 집광돌기의 밑면의 길이(L)가 200㎛, 높이(H)는 100㎛로 하여 태양전지 모듈을 완성한다.The same process as in Example 2, except that the die is manufactured in the shape of truncated hexagonal pyramid to form a light collecting protrusion. The length L of the bottom surface of the condensing protrusion is 200 µm and the height H is 100 µm to complete the solar cell module.
비교예 1Comparative Example 1
앞면시트 및 후면시트는 폴리에틸렌(polyethyleme)으로 하고, EVA 필름을 봉지재로 하여 실시예 1과 같은 재료로 태양전지 모듈을 제조하는 데, 금형을 이용하지 않았으며, 집광돌기를 형성하지 않고 라미네이션 과정에 의해 태양전지 모듈을 완성하였다.The front sheet and the back sheet are made of polyethylene, and the EVA film is used as a sealing material to manufacture the solar cell module using the same material as in Example 1, without using a mold, and without forming a condensing protrusion. The solar cell module was completed.
표 1
구 분 전체투광도(%) 산란도(%) 산란투과량(%) 평행투과량(%)
실시예 1 91.20 61.72 56.29 34.91
실시예 2 90.08 55.56 50.05 40.03
실시예 3 93.40 76.63 69.85 22.46
실시예 4 90.53 58.75 53.19 37.34
비교예 1 88.59 11.62 10.29 78.30
Table 1
division Total transmittance (%) Scattering degree (%) Scattering Transmission Rate (%) Parallel transmittance (%)
Example 1 91.20 61.72 56.29 34.91
Example 2 90.08 55.56 50.05 40.03
Example 3 93.40 76.63 69.85 22.46
Example 4 90.53 58.75 53.19 37.34
Comparative Example 1 88.59 11.62 10.29 78.30
실험방법Experiment method
JIS K7136 표준방법에 의하여 NDH 5000W 헤이즈미터(니폰덴쇼쿠 인더스트리 (Nippon Denshoku Industries Co.,Ltd.))로 전체투광도(%), 산란투과량(%) 등을 측정함.The total light transmittance (%) and scattering transmittance (%) were measured by NDH 5000W haze meter (Nippon Denshoku Industries Co., Ltd.) according to JIS K7136 standard method.
이상에서 설명한 본 발명은 전술한 실시예 및 첨부된 도면에 의해 한정되는 것이 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치환, 변형 및 변경이 가능함은 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에게 있어서 명백할 것이다.The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

Claims (10)

  1. 태양전지 모듈에 있어서, 태양 광을 투과시켜 빛을 집광시키는 광포획층;A solar cell module, comprising: a light trapping layer for condensing light by transmitting sunlight;
    태양 광에 의해 전력을 생산하는 다수 개의 태양전지;A plurality of solar cells producing power by solar light;
    상기 태양광이 통과되어 태양전지에 도달하게 하고 외부로부터 태양전지를 보호하는 봉지재; 및An encapsulant which allows the solar light to pass through to reach the solar cell and protects the solar cell from the outside; And
    태양전지를 보호하고 뒷면에서 태양 광을 반사하여 발전 효율을 높이는 후면 시트를 포함하되,Includes a back sheet that protects the solar cells and reflects sunlight from the back to increase power generation efficiency,
    상기 광포획층은 고분자 수지로 이루어지며 집광돌기를 포함하는 것을 특징으로 하는 태양전지 모듈.The light trap layer is made of a polymer resin, characterized in that the solar cell module comprising a condensing projection.
  2. 제1항에 있어서,The method of claim 1,
    상기 집광돌기는 다각뿔형상, 원뿔형상, 절두 다각뿔형상, 절두 원뿔형상인 것을 특징으로 하는 태양전지 모듈.The condensing protrusion has a polygonal cone shape, a cone shape, a truncated polygon cone shape, a truncated cone shape, characterized in that the solar cell module.
  3. 제2항에 있어서,The method of claim 2,
    상기 집광돌기의 밑면의 길이(L)는 50 ~ 500㎛이며, 집광돌기의 높이(H)는 30 ~ 200㎛인 것을 특징으로 하는 태양전지 모듈.The length L of the bottom surface of the condensing protrusion is 50 to 500 μm, and the height H of the condensing protrusion is 30 to 200 μm.
  4. 제1항에 있어서,The method of claim 1,
    상기 광포획층은 폴리이서술폰(polyestersulfone), 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate), 폴리부틸렌 테레프탈레이트(polybutylene terepthalate), 황화 폴리페닐렌(polyphenylene sulfide), 폴리프로필렌(polypropylene), 아라미드(aramid), 폴리아미데마이드(polyamideimide), 폴리이미드(polyimide), 아로마틱폴리이미드(aromaticpolyimide), 폴리에테르이미드(polyetherimide), 폴리비닐리덴 플로라이드(polyvinylidene fluoride), 아크릴로니트릴 부타딘 스티렌(acrylonitrile butadienestyrene), 에틸렌 테트라플루오로에틸렌(Ethylene Tetrafluoroethylene) 및 염화 폴리비닐(polyvinyl chlorides)로 이루어진 군에서 1이상 선택되는 것을 특징으로 하는 태양전지 모듈.The light trapping layer is a polyestersulfone, polyethylene, polycarbonate, polycarbonate, polystyrene, polyethylene terepthhalate, polyethylene naphthalate, polybutylene terephthalate polybutylene terepthalate, polyphenylene sulfide, polypropylene, aramid, polyamideimide, polyimide, aromatic polyimide, polyetherimide ), Polyvinylidene fluoride, acrylonitrile butadiene styrene (acrylonitrile butadienestyrene), ethylene tetrafluoroethylene and polyvinyl chloride (polyvinyl chlorides) Solar cell module.
  5. 제1항에 있어서,The method of claim 1,
    상기 봉지재는 EVA, 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate) 및 폴리비닐부티럴(polyvinyl butyral)로 이루어진 군에서 1이상 선택되는 것을 특징으로 하는 태양전지 모듈.The encapsulant is EVA, polyethylene (polyethyleme), polycarbonate (polycarbonate), polystyrene (polystyrene), polyethylene terepthhalate, polyethylene naphthalate (polyethylene naphthalate) and polyvinyl butyral (polyvinyl butyral) The solar cell module, characterized in that selected above.
  6. 태양전지 모듈 제조방법에 있어서,In the solar cell module manufacturing method,
    집광돌기를 형성하는 금형 준비단계;A mold preparation step of forming a light collecting protrusion;
    후면시트, 봉지재, 태양전지, 봉지재 및 앞면시트의 순서로 적층하는 단계; 및Stacking the back sheet, the encapsulant, the solar cell, the encapsulant, and the front sheet; And
    상기 금형을 통해 압착하여 적층된 모듈을 라미네이션하는 단계를 포함하되,Laminating the laminated module by pressing through the mold,
    상기 금형을 통해 앞면시트에 집광돌기를 형성하여 광포획층을 형성하는 것을 특징으로 하는 태양전지 모듈 제조방법.The solar cell module manufacturing method characterized in that to form a light trapping layer by forming a condensing protrusion on the front sheet through the mold.
  7. 제6항에 있어서,The method of claim 6,
    상기 집광돌기는 다각뿔형상, 원뿔형상, 절두 다각뿔형상, 절두 원뿔형상인 것을 특징으로 하는 전지 모듈 제조방법.The condensing protrusion has a polygonal cone shape, a cone shape, a truncated polygon cone shape, a truncated cone shape, characterized in that the battery module manufacturing method.
  8. 제7항에 있어서,The method of claim 7, wherein
    상기 집광돌기의 밑면의 길이(L)는 50 ~ 500㎛이며, 집광돌기의 높이(H)는 30 ~ 200㎛인 것을 특징으로 하는 태양전지 모듈 제조방법.The length L of the bottom surface of the condensing protrusion is 50 to 500 μm, and the height H of the condensing protrusion is 30 to 200 μm.
  9. 제6항에 있어서,The method of claim 6,
    상기 광포획층은 폴리이서술폰(polyestersulfone), 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate), 폴리부틸렌 테레프탈레이트(polybutylene terepthalate), 황화 폴리페닐렌(polyphenylene sulfide), 폴리프로필렌(polypropylene), 아라미드(aramid), 폴리아미데마이드(polyamideimide), 폴리이미드(polyimide), 아로마틱폴리이미드(aromaticpolyimide), 폴리에테르이미드(polyetherimide), 폴리비닐리덴 플로라이드(polyvinylidene fluoride), 아크릴로니트릴 부타딘 스티렌(acrylonitrile butadienestyrene), 에틸렌 테트라플루오로에틸렌(Ethylene Tetrafluoroethylene) 및 염화 폴리비닐(polyvinyl chlorides), 폴리비닐리덴 플로라이드(polyvinylidene fluoride)로 이루어진 군에서 1이상 선택되는 것을 특징으로 하는 태양전지 모듈 제조방법.The light trapping layer is a polyestersulfone, polyethylene, polycarbonate, polycarbonate, polystyrene, polyethylene terepthhalate, polyethylene naphthalate, polybutylene terephthalate polybutylene terepthalate, polyphenylene sulfide, polypropylene, aramid, polyamideimide, polyimide, aromatic polyimide, polyetherimide ), Polyvinylidene fluoride, acrylonitrile butadiene styrene, ethylene tetrafluoroethylene and polyvinyl chlorides, polyvinylidene fluoride Characterized in that one or more selected from the group consisting of The method of manufacturing a solar cell module.
  10. 제6항에 있어서,The method of claim 6,
    상기 봉지재는 상기 봉지재는 EVA, 폴리에틸렌(polyethyleme), 폴리카보네이트(polycarbonate), 폴리스티렌(polystyrene), 폴리에틸렌 테레프탈레이트(polyethylene terepthhalate), 폴리에틸렌 나프탈레이트(polyethylene naphthalate) 및 폴리비닐부티럴(polyvinyl butyral)로 이루어진 군에서 1이상 선택되는 것을 특징으로 하는 태양전지 모듈 제조방법.The encapsulant is made of EVA, polyethylene (polyethyleme), polycarbonate (polycarbonate), polystyrene (polystyrene), polyethylene terepthhalate, polyethylene naphthalate (polyethylene naphthalate) and polyvinyl butyral (polyvinyl butyral) Solar cell module manufacturing method characterized in that at least one selected from the group.
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