TWI746034B - Solar cell unit, process for producing the same and solar cell assembly comprising the same - Google Patents
Solar cell unit, process for producing the same and solar cell assembly comprising the same Download PDFInfo
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- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
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- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0512—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module made of a particular material or composition of materials
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- 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
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Abstract
Description
本發明係關於一種太陽能電池單元，其包含電池片及位於該電池片之一側的第一層，其中該第一層包含第一膠膜層及位於該第一膠膜層之一側的基板。根據本發明之太陽能電池單元可防電池片隱裂，從而降低太陽能電池模組內部的電池片發生隱裂的機率，藉以減緩太陽能電池模組發電效率的衰退及延長其發電壽命。The present invention relates to a solar battery unit, which includes a battery sheet and a first layer located on one side of the battery sheet, wherein the first layer includes a first adhesive film layer and a substrate located on one side of the first adhesive film layer . The solar cell unit according to the present invention can prevent the cell chip from cracking, thereby reducing the probability of cell chip cracking inside the solar cell module, thereby slowing the decline of the solar cell module's power generation efficiency and extending its power generation life.
太陽能電池片將太陽光透過光生伏打效應轉換成電能，主要包含PN接面。Solar cells convert sunlight into electrical energy through the photovoltaic effect, mainly including PN junctions.
常見的太陽能電池片材料包含但不限於晶體矽及非晶體矽、CdTe、CdAs、CuInSe、CuInGaSe、染料敏化及高分子薄膜等材料，其中基於晶體矽(包括單晶矽及多晶矽)的太陽能電池的發展最為成熟。Common solar cell materials include, but are not limited to, crystalline silicon and amorphous silicon, CdTe, CdAs, CuInSe, CuInGaSe, dye-sensitized and polymer thin films, among which solar cells based on crystalline silicon (including monocrystalline silicon and polycrystalline silicon) The development of the most mature.
晶體矽太陽能電池中電池片的生產流程主要包括矽料提純、拉晶或鑄錠、切片、清洗粗糙化、擴散形成PN接面、二次清洗、製備抗反射膜、印刷電極及燒結。The production process of cells in crystalline silicon solar cells mainly includes silicon material purification, crystal pulling or ingot casting, slicing, cleaning roughening, diffusion to form PN junction, secondary cleaning, preparation of anti-reflective film, printing electrodes and sintering.
由於成本的考量，在上述切片步驟中有將單晶矽棒或多晶矽錠越切越薄的趨勢。此外，在矽晶片製作成電池片的過程中，矽晶片需受高溫、蝕刻、鍍膜等處理，因此其內部易殘留熱應力或機械應力。電池片的厚度變薄及內部應力殘留使其在後續製程中容易產生不易以肉眼觀察到細微破裂，亦即隱裂。除了上述因素，矽晶片本身的晶體缺陷也是導致隱裂的主要因素之一。Due to cost considerations, there is a tendency to cut single crystal silicon rods or polycrystalline silicon ingots thinner and thinner in the above-mentioned slicing step. In addition, in the process of manufacturing silicon wafers into solar cells, the silicon wafers need to be processed by high temperature, etching, coating, etc., so thermal stress or mechanical stress is likely to remain inside the silicon wafer. The thinning of the thickness of the cell and the residual internal stress make it easy to produce micro cracks, that is, cracks, which are not easy to be observed with the naked eye during the subsequent manufacturing process. In addition to the above factors, the crystal defects of the silicon wafer itself are also one of the main factors that cause the cracks.
此外，單一太陽能電池片因工作電壓低，無法直接作為電源；因此，需將多個太陽能電池片以串、並聯的方式連接並封裝才能獲得可作為獨立電源的太陽能電池模組。In addition, a single solar cell cannot be directly used as a power source due to its low operating voltage; therefore, multiple solar cells need to be connected and packaged in series and parallel to obtain a solar cell module that can be used as an independent power source.
製備太陽能電池模組的製程主要包括鋪置可透光的前蓋板、鋪置第一層可透光的封裝膠膜、串聯數個單一太陽能電池片、焊接成串列、定位串列及焊接串列、鋪置第二層封裝膠膜、鋪置背板、層壓、裁邊、封邊裝框及安裝接線盒等步驟。在上述步驟中所使用的串焊機、層壓機及裝框機直接對太陽能電池片施加作用力；因此，若加工參數設置不當(例如但不限於焊接溫度過高、焊帶硬度太高、串焊機探針下壓機械作用力過大)，電池片將因厚度變薄及內部殘留的應力等原因，較難抵抗外加的應力而造成隱裂。The process of preparing solar cell modules mainly includes laying a light-permeable front cover, laying a first layer of light-permeable packaging film, connecting several single solar cells in series, welding into series, positioning series, and welding. Tandem, lay the second layer of encapsulation film, lay the backboard, lamination, trimming, sealing and framing, and installing the junction box. The stringer, laminator, and framing machine used in the above steps directly exert force on the solar cells; therefore, if the processing parameters are set improperly (for example, but not limited to the welding temperature is too high, the welding strip hardness is too high, The pressure of the stringer probe is too large), the cell will be more difficult to resist the applied stress and cause cracks due to the thinning of the thickness and the residual internal stress.
具體而言，例如但不限於在串焊步驟中對電池片的局部位置加熱焊接，造成該位置與周圍之間的溫度差及膨脹程度不同，該等差異在同一個平面內互相拉扯造成面內應力。變薄的電池片承受面內應力的能力差、容易因焊接所造成的溫度差造成隱裂，所造成的隱裂主要發生在主柵線（busbar）附近，尤其頭尾，因為該等位置具有應力集中效應。此外，若焊接溫度過高或時間過長將造成過焊，使主柵線下與其周圍發生隱裂及電池片正面的細柵線(finger)斷開。Specifically, for example, but not limited to, heating and welding of a local position of the cell in the string welding step, resulting in a difference in temperature and expansion between the position and the surrounding area, and these differences pull each other in the same plane to cause in-plane stress. force. Thinned cells have poor ability to withstand in-plane stress and are prone to cracks due to temperature differences caused by welding. The cracks caused mainly occur near the busbar, especially the head and tail, because these positions have Stress concentration effect. In addition, if the welding temperature is too high or the time is too long, it will cause over-soldering, causing cracks to occur under and around the main grid line, and the fine grid lines (finger) on the front of the cell are disconnected.
隱裂的影響可大可小，重點在於裂紋的形狀。根據電池片隱裂的形狀，可分樹狀裂紋、綜合型裂紋、斜裂紋、平行於主柵線、垂直於柵線和貫穿整個電池片的裂紋，其中平行於主柵線的裂紋最容易對細柵線造成影響。若細柵線斷裂將無法將收集到的電流輸送至主柵線，導致電池片部分甚至全部失效、大幅度降低電池片的效率。The impact of cracks can be large or small, and the focus is on the shape of the crack. According to the shape of the cell chip, it can be divided into tree cracks, integrated cracks, oblique cracks, cracks parallel to the main grid line, perpendicular to the grid line and through the entire cell. Among them, the cracks parallel to the main grid line are the easiest to deal with. The thin grid lines make an impact. If the thin grid line breaks, it will not be able to deliver the collected current to the main grid line, resulting in partial or complete failure of the cell and greatly reducing the efficiency of the cell.
因此，技術領域中期望一種可以防止電池片隱裂之太陽能電池單元及薄型化、輕量化及無框化的太陽能模組，從而增加太陽能模組的可應用性。技術領域中亦期望一種可以減少面內應力，例如但不限於減少使用焊接，的太陽能模組。Therefore, there is a desire in the technical field for a solar cell unit that can prevent the cell from cracking, and a thinner, lighter, and frameless solar module, so as to increase the applicability of the solar module. In the technical field, there is also a desire for a solar module that can reduce in-plane stress, such as but not limited to reducing the use of welding.
本發明的目的在於提供一種可防電池片隱裂之太陽能電池單元，其額外將太陽能電池片與防隱裂薄膜層結合，以提升電池片對機械應力性與熱應力的抗性，從而降低太陽能電池模組內部電池片發生隱裂的機率，藉以減緩太陽能電池模組發電效率的衰退及延長其發電壽命。The purpose of the present invention is to provide a solar cell unit capable of preventing cell cracking, which additionally combines the solar cell with an anti-cracking film layer to improve the resistance of the cell to mechanical stress and thermal stress, thereby reducing solar energy The probability of the internal cells of the battery module cracking, so as to slow down the decline of the solar cell module's power generation efficiency and extend its power generation life.
本發明的另一個目的在於提供一種製造上述太陽能電池單元的方法。Another object of the present invention is to provide a method of manufacturing the above-mentioned solar cell unit.
本發明的又一個目的在於提供一種包含上述太陽能電池單元的太陽能電池模組，其中焊帶與電極線間的接合，部分或全部以非焊接方式，例如但不限於加熱接合或以黏著劑接合的方式取代。Another object of the present invention is to provide a solar cell module containing the above-mentioned solar cell unit, in which the bonding between the soldering tape and the electrode wire is partially or completely non-welded, such as but not limited to heat bonding or adhesive bonding. Way to replace.
本案實施例的額外層面及優點將部分地在後續說明中描述、顯示、或是經由本案實施例的實施而闡釋。The additional aspects and advantages of the embodiments of the present case will be partially described, shown, or explained through the implementation of the embodiments of the present case in the subsequent description.
為便於理解本文所陳述的揭示內容，茲於下文中定義若干術語。In order to facilitate the understanding of the disclosure stated in this article, a number of terms are defined below.
在本發明中，術語「約」意謂由一般熟習此項技術者所測定的特定值的可接受誤差，其部分地視如何量測或測定該值而定。In the present invention, the term "about" means the acceptable error of a specific value determined by those skilled in the art, and it depends in part on how the value is measured or measured.
在本發明中，用語「電池片」意謂將太陽光通過光生伏打效應轉成電能的太陽能電池，例如但不限於晶體矽太陽能電池片。In the present invention, the term "cell" means a solar cell that converts sunlight into electrical energy through the photovoltaic effect, such as but not limited to a crystalline silicon solar cell.
在本發明中，用語「太陽能電池單元」相當於電池片與防隱裂薄膜層之組合，在太陽能電池模組的封裝製程中可視為電池片。In the present invention, the term "solar cell unit" is equivalent to a combination of a cell and an anti-cracking film layer, and can be regarded as a cell in the packaging process of the solar cell module.
太陽能電池單元Solar cell
相較於先前技術，根據本發明的太陽能電池單元，如圖1所示，除電池片(1)外進一步包含第一防隱裂薄膜層(以下稱：第一層(6))，其中該第一防隱裂薄膜層包含第一防隱裂膠膜層(以下稱：第一膠膜層(7))及防隱裂基板(以下稱：基板(8))，其中該第一層較佳位於該電池片的背面。Compared with the prior art, the solar cell unit according to the present invention, as shown in FIG. 1, further includes a first anti-cracking film layer (hereinafter referred to as: the first layer (6)) in addition to the cell sheet (1), wherein the The first anti-cracking film layer includes a first anti-cracking adhesive film layer (hereinafter referred to as the first adhesive film layer (7)) and an anti-cracking substrate (hereinafter referred to as the substrate (8)), wherein the first layer is relatively It is located on the back of the cell.
根據本發明的太陽能電池單元，相較於先前技術的電池片，具有較強的機械應力抗性。因此，經封裝成模組後，該模組的機械荷載能力也會變高，可減少電池片產生隱裂的機率。The solar cell unit according to the present invention has stronger resistance to mechanical stress than the cell sheet of the prior art. Therefore, after being packaged into a module, the mechanical load capacity of the module will also increase, which can reduce the probability of cell cracking.
電池片(1)Cell (1)
根據本發明之太陽能電池單元所使用的電池片材料無特殊限制，可為本發明所屬技術中具有通常知識者所能輕易選用者，例如但不限於晶體矽太陽能電池及非晶體矽、CdTe、CdAs、CuInSe、CuInGaSe、染料敏化及高分子薄膜電池等。根據本發明的太陽能電池單元尤其適用於晶體矽太陽能電池，其可為單晶矽或多晶矽太陽能電池。The cell material used in the solar cell unit according to the present invention is not particularly limited, and can be easily selected by those with ordinary knowledge in the technology of the present invention, such as but not limited to crystalline silicon solar cells and amorphous silicon, CdTe, CdAs , CuInSe, CuInGaSe, dye-sensitized and polymer thin film batteries. The solar cell unit according to the present invention is particularly suitable for crystalline silicon solar cells, which can be monocrystalline silicon or polycrystalline silicon solar cells.
根據本發明之太陽能電池單元所使用的電池片厚度無特殊限制。根據本發明的太陽能電池單元尤其適用於厚度不超過約180微米的電池片，更佳不超過約150微米，尤佳約不超過120微米。The thickness of the cell sheet used in the solar cell unit according to the present invention is not particularly limited. The solar cell unit according to the present invention is particularly suitable for solar cells whose thickness does not exceed about 180 microns, more preferably does not exceed about 150 microns, and particularly preferably does not exceed about 120 microns.
第一膠膜層(7)The first film layer (7)
根據本發明之太陽能電池單元所使用的第一膠膜層材料無特殊限制，可為本發明所屬技術中具有通常知識者所能輕易選用者，例如但不限於EVA(乙烯醋酸乙烯酯共聚合樹脂)、POE(聚烯烴彈性體樹脂)、PVB(聚乙烯醇縮丁醛樹脂)、有機矽膠樹脂、環氧樹脂膠、壓克力膠等。本發明所使用的第一膠膜層材料可與後續太陽能電池模組所使用的封裝材料相同或者不相同。The first adhesive film layer material used in the solar cell unit of the present invention is not particularly limited, and can be easily selected by those with ordinary knowledge in the art of the present invention, such as but not limited to EVA (ethylene vinyl acetate copolymer resin). ), POE (polyolefin elastomer resin), PVB (polyvinyl butyral resin), silicone resin, epoxy resin, acrylic, etc. The material of the first adhesive film layer used in the present invention may be the same as or different from the packaging material used in subsequent solar cell modules.
根據本發明的第一膠膜層可不具有或具有開孔；若具有開孔，該開孔的位置較佳經配置與電池片上的電極線位置重合。The first adhesive film layer according to the present invention may not have or have openings; if there are openings, the position of the opening is preferably configured to coincide with the position of the electrode line on the battery sheet.
根據本發明的一個具體實施態樣，該第一膠膜層每平方公分可具有兩個以上的開孔(例如但不限於蜂窩狀結構)。According to a specific implementation aspect of the present invention, the first adhesive film layer may have more than two openings per square centimeter (for example, but not limited to a honeycomb structure).
根據本發明之太陽能電池單元所使用的第一膠膜層厚度無特殊限制，較佳為約50至1000微米，更佳為約150至500微米，尤佳為約250至400微米。The thickness of the first adhesive film layer used in the solar cell unit according to the present invention is not particularly limited, and is preferably about 50 to 1000 microns, more preferably about 150 to 500 microns, and particularly preferably about 250 to 400 microns.
基板(8)Substrate (8)
根據本發明之太陽能電池單元包含基板，使得第一膠膜層與後續封裝成太陽能電池模組的製程中所鋪設的封裝膠膜間存在至少一層不同於該第一膠膜層且不同於該封裝膠膜的材料。The solar cell unit according to the present invention includes a substrate, so that there is at least one layer between the first adhesive film layer and the packaging adhesive film laid in the subsequent process of packaging into a solar cell module that is different from the first adhesive film layer and different from the packaging The material of the film.
根據本發明之太陽能電池單元所使用的基板材料與該第一膠膜層材料不同，但可為本發明所屬技術中具有通常知識者所能輕易選用者，例如但不限於金屬(例如但不限於金、銀、銅、鐵、錫、不鏽鋼或鋁、鎂或鈦等合金等)、陶瓷(例如但不限於氧化鋁、氮化鋁、氮化硼或氧化鋯等)、有機塑膠(例如但不限於PET、PC、PE、PVC或PP等)、玻璃纖維強化熱固性塑膠、碳纖維強化熱固性塑膠、玻纖布、玻璃或其它複合材等。根據本發明之太陽能電池單元所使用的基板材料較佳為具優良導熱性及/或氣密性的材料，例如但不限於金屬或陶瓷。The substrate material used in the solar cell unit according to the present invention is different from the material of the first adhesive film layer, but it can be easily selected by a person with ordinary knowledge in the art of the present invention, such as but not limited to metal (such as but not limited to Gold, silver, copper, iron, tin, stainless steel or aluminum, magnesium or titanium alloys, etc.), ceramics (such as but not limited to aluminum oxide, aluminum nitride, boron nitride or zirconium oxide, etc.), organic plastics (such as but not Limited to PET, PC, PE, PVC or PP, etc.), glass fiber reinforced thermosetting plastic, carbon fiber reinforced thermosetting plastic, glass fiber cloth, glass or other composite materials, etc. The substrate material used in the solar cell unit according to the present invention is preferably a material with excellent thermal conductivity and/or air tightness, such as but not limited to metal or ceramic.
根據本發明之太陽能電池單元所使用的基板厚度無特殊限制，較佳約為10至1000微米，更佳約為20至100微米，尤佳約為30至50微米。The thickness of the substrate used in the solar cell unit according to the present invention is not particularly limited, and is preferably about 10 to 1000 micrometers, more preferably about 20 to 100 micrometers, and particularly preferably about 30 to 50 micrometers.
根據本發明的基板可不具有或具有開孔；若具有開孔，該開孔的位置較佳經配置與電池片上的電極線位置重合。The substrate according to the present invention may not have or have an opening; if it has an opening, the position of the opening is preferably configured to coincide with the position of the electrode line on the battery sheet.
根據本發明的一個具體實施態樣，該基板每平方公分可具有兩個以上的開孔(例如但不限於蜂窩狀結構)。According to a specific implementation aspect of the present invention, the substrate may have more than two openings per square centimeter (for example, but not limited to a honeycomb structure).
在本發明的一個具體實施態樣中，根據本發明之太陽能電池單元所使用的基板在與第一膠膜層接觸的表面上具有凹凸微結構不平坦的粗糙設計，該粗糙設計可提高該基板與該第一膠膜層的結合。In a specific embodiment of the present invention, the substrate used in the solar cell unit according to the present invention has a rough design with uneven microstructures on the surface in contact with the first adhesive film layer, and the rough design can improve the substrate Combination with the first film layer.
在本發明的一個具體實施態樣中，如圖2所示，該第一膠膜層包覆焊帶(例如但不限於9)。In a specific implementation aspect of the present invention, as shown in FIG. 2, the first adhesive film layer covers the welding tape (for example, but not limited to 9).
在本發明的一個具體實施態樣中，該第一膠膜層包覆焊帶且該焊帶與前述基板接觸。In a specific embodiment of the present invention, the first adhesive film layer covers the solder ribbon and the solder ribbon is in contact with the aforementioned substrate.
根據本發明之太陽能電池單元中第一膠膜層所包覆的焊帶材料無特殊限制，可為本發明所屬技術中具有通常知識者所能輕易選用者，例如但不限於含銅、錫、銀、鉛、鉍或彼等之組合。According to the solar cell unit of the present invention, there is no special restriction on the material of the welding strip covered by the first adhesive film layer, and can be easily selected by those with ordinary knowledge in the art of the present invention, such as but not limited to those containing copper, tin, Silver, lead, bismuth or a combination of them.
根據本發明之太陽能電池單元中第一膠膜層所包覆的焊帶材可用作例如但不限於連接主柵線及主柵線或連接電池片及電池片。The soldering tape covered by the first adhesive film layer in the solar battery unit according to the present invention can be used, for example, but not limited to, to connect bus bars and bus bars or to connect cells and cells.
在本發明的一個具體實施態樣中，如圖3所示，該太陽能電池單元進一步包含第二膠膜層(10)，該第二膠膜層較佳位於該電池片的正面。In a specific embodiment of the present invention, as shown in FIG. 3, the solar cell unit further includes a second adhesive film layer (10), and the second adhesive film layer is preferably located on the front side of the cell.
根據本發明之太陽能電池單元所使用的第二膠膜層材料無特殊限制，可為本發明所屬技術中具有通常知識者所能輕易選用者，例如但不限於EVA(乙烯醋酸乙烯酯共聚合樹脂)、POE(聚烯烴彈性體樹脂)、PVB(聚乙烯醇縮丁醛樹脂)、有機矽膠樹脂、環氧樹脂膠、壓克力膠等。據本發明之太陽能電池單元所使用的第二膠膜層材料較佳具有高透光特性，可提高太陽光入射到電池片內的光量，藉以幫助增加太陽能電池模組的發電效率。本發明所使用的第二膠膜層材料可與後續太陽能電池模組所使用的封裝材料相同或者不相同，亦可與該第一膠層材料相同或不同。The second adhesive film layer material used in the solar cell unit according to the present invention is not particularly limited, and can be easily selected by those with ordinary knowledge in the art of the present invention, such as but not limited to EVA (ethylene vinyl acetate copolymer resin). ), POE (polyolefin elastomer resin), PVB (polyvinyl butyral resin), silicone resin, epoxy resin, acrylic, etc. The second adhesive film layer material used in the solar cell unit of the present invention preferably has high light transmission characteristics, which can increase the amount of sunlight incident into the cell, thereby helping to increase the power generation efficiency of the solar cell module. The material of the second adhesive film layer used in the present invention may be the same as or different from the packaging material used in subsequent solar cell modules, and may also be the same or different from the material of the first adhesive layer.
根據本發明之太陽能電池單元所使用的第二膠膜層厚度無特殊限制，較佳約為50至1000微米，更佳約為150至750微米，尤佳約為250至650微米。本發明所使用的第二膠膜層材料之厚度可與該第一膠層之厚度相同或不同。The thickness of the second adhesive film layer used in the solar cell unit according to the present invention is not particularly limited, and is preferably about 50 to 1000 microns, more preferably about 150 to 750 microns, and particularly preferably about 250 to 650 microns. The thickness of the second adhesive film layer material used in the present invention can be the same as or different from the thickness of the first adhesive layer.
根據本發明的第二膠膜層可不具有或具有開孔；若具有開孔，該開孔的位置較佳經配置與電池片上的電極線位置重合。The second adhesive film layer according to the present invention may not have or have openings; if there are openings, the position of the opening is preferably configured to coincide with the position of the electrode line on the battery sheet.
根據本發明的一個具體實施態樣，該第二膠膜層每平方公分可具有兩個以上的開孔(例如但不限於蜂窩狀結構)。According to a specific implementation aspect of the present invention, the second adhesive film layer may have more than two openings per square centimeter (for example, but not limited to a honeycomb structure).
在本發明的一個具體實施態樣中，如圖4所示，該第二膠膜層包覆焊帶(例如但不限於9)。In a specific implementation aspect of the present invention, as shown in FIG. 4, the second adhesive film layer covers the welding tape (for example, but not limited to 9).
根據本發明之太陽能電池單元中第二膠膜層所包覆的焊帶材料無特殊限制，可為本發明所屬技術中具有通常知識者所能輕易選用者，例如但不限於含銅、錫、銀、鉛、鉍或彼等之組合。According to the solar cell unit of the present invention, the material of the welding strip covered by the second adhesive film layer is not particularly limited, and can be easily selected by those with ordinary knowledge in the technology of the present invention, such as but not limited to those containing copper, tin, Silver, lead, bismuth or a combination of them.
根據本發明之太陽能電池單元中第二膠膜層所包覆的焊帶材可用作例如但不限於連接主柵線及主柵線或連接電池片及電池片。The solder tape covered by the second adhesive film layer in the solar battery unit according to the present invention can be used, for example, but not limited to, to connect the busbar and the busbar or to connect the cell and the cell.
在本發明的一個具體實施態樣中，如圖5所示，該第二膠膜層的上方以光學薄膜(11)覆蓋。In a specific embodiment of the present invention, as shown in FIG. 5, the upper part of the second adhesive film layer is covered with an optical film (11).
根據本發明之太陽能電池單元所使用的光學薄膜材料無特殊限制，例如但不限於PET膜材上鍍製多層氧化物薄膜結構以增加入射至太陽能電池單元的太陽光，或PET膜材表面上製作凹凸結構以增加入射至太陽能電池單元的太陽光，該光學薄膜較佳可與後續製程的前蓋板形成一個聚光的結構，例如但不限於非涅爾透鏡結構。The optical film material used in the solar cell unit according to the present invention is not particularly limited. For example, but not limited to, the PET film is coated with a multilayer oxide film structure to increase the sunlight incident on the solar cell, or it is made on the surface of the PET film. The concave-convex structure increases the sunlight incident on the solar cell unit. The optical film preferably forms a light-concentrating structure with the front cover of the subsequent process, such as but not limited to a non-Nell lens structure.
太陽能電池單元的製備方法Method for preparing solar battery unit
根據本發明太陽能電池單元之製備方法因根據本發明的太陽能電池單元進一步包含防隱裂薄膜層，因此需要額外步驟，主要係將防隱裂薄膜層與電池片接合，其中若存在焊帶，太陽能電池單元中的焊帶精準地與電池片上的電極線對齊，且可經由該防隱裂薄膜層與該電池片的接合完成該焊帶與該電極線的接合，亦可視情況局部地二次接合，以提高該焊帶與該電極線間的接合。According to the preparation method of the solar cell unit of the present invention, because the solar cell unit according to the present invention further includes an anti-cracking film layer, an additional step is required, which is mainly to join the anti-cracking film layer with the cell. The welding tape in the battery cell is precisely aligned with the electrode line on the battery sheet, and the welding of the welding tape and the electrode line can be completed through the bonding of the anti-cracking film layer and the battery sheet, and the welding tape and the electrode line can also be partially joined again depending on the situation. , In order to improve the bonding between the welding tape and the electrode wire.
與習知直接將焊帶焊接至電池片(參圖6)的方法有明顯的差異，根據本發明的太陽能電池單元之製備方法，可將焊帶與電極線不經焊接接合，以減少殘留在電池片上的應力，從而降低電池片在封裝過程中或後發生隱裂的機率。There is a clear difference from the conventional method of directly welding the solder ribbon to the cell (see Figure 6). According to the method for preparing the solar cell unit of the present invention, the solder ribbon and the electrode wire can be joined without welding to reduce residual The stress on the cell, thereby reducing the probability of cracking of the cell during or after the packaging process.
根據本發明太陽能電池單元之製備方法，包含以下步驟： (A) 將第一膠膜層與基板接合成第一防隱裂薄膜層(下稱：第一層)；及 (B) 選自由以下步驟組成之群之至少一者： (1) 先將焊帶與電池片上的電極線對齊，再將步驟(A)所得之該第一層與該電池片接合，其中經對齊的該焊帶及該電極線因該第一層與該電池片接合而接合，視情況局部地加強接合，以提高該焊帶與該電極線間的接合，及其中該第一膠膜層及該基板可分別經開孔或不經開孔，較佳不經開孔(參圖7)； (2) 先將焊帶依電池片上的電極線的尺寸及間距位置放置於步驟(A)所得之該第一層上，再將該第一層與該電池片接合，其中該焊帶及該電極線因該第一層與該電池片接合而接合，視情況局部地加強接合，以提高該焊帶與該電極線間的接合，其中該第一膠膜層及該基板可分別經開孔或不經開孔，較佳不經開孔(參圖8)；及 (3) 先將步驟(A)所得之該第一層與電池片接合，其中該第一膠膜層及/或該基板具有複數個開孔且該複數個開孔的位置經配置與該電池片上的電極線位置重合以便自該開孔處將焊帶與該電極線接合(參圖9)； 其中在步驟(A)中，該第一膠膜層與該基板以例如但不限於鍍膜(例如但不限於網印塗布、旋轉塗布、狹縫式塗布、浸塗、擠出塗布)或加熱接合的方式(例如但不限於卷對卷紅外線加熱、卷對卷熱風加熱)互相接合； 其中在步驟(B)中，該電池片與該第一層的接合方式可為例如但不限於加熱接合，其中加熱接合溫度較佳在60至250°C，更佳在100至150°C，或經黏著劑接合，且視情形透過例如但不限於加熱器局部地二次接合，以提高該焊帶與該電極線間的接合；及 其中該焊帶可例如但不限於以加熱接合及/或以黏著劑接合及/或焊接的方式與該電池片上的該電極線接合，較佳該焊帶僅以加熱接合及/或黏著劑接合的方式精準地與該電池片上的該電極線對位接合，更佳該焊帶僅以加熱接合的方式精準地與該電池片上的該電極線對位接合，其中加熱溫度較佳在60至250°C，更佳在100至150°C。 According to the manufacturing method of the solar cell unit of the present invention, the method includes the following steps: (A) Join the first adhesive film layer and the substrate to form the first anti-cracking film layer (hereinafter referred to as the first layer); and (B) Choose from at least one of the following steps: (1) First align the solder tape with the electrode lines on the battery sheet, and then join the first layer obtained in step (A) with the battery sheet. The aligned solder tape and the electrode line are due to the first layer and The battery pieces are joined to join, and the joining is locally strengthened as the case may be to improve the joining between the solder ribbon and the electrode wire, and the first adhesive film layer and the substrate can be respectively perforated or not perforated. It is better not to open the hole (refer to Figure 7); (2) First place the solder tape on the first layer obtained in step (A) according to the size and spacing of the electrode wires on the battery sheet, and then join the first layer with the battery sheet, where the solder tape and the The electrode wire is joined due to the joining of the first layer and the battery sheet, and the joining is strengthened locally as appropriate to improve the bonding between the solder ribbon and the electrode wire, wherein the first adhesive film layer and the substrate can be respectively perforated Or without perforation, preferably without perforation (refer to Figure 8); and (3) First join the first layer obtained in step (A) with the battery sheet, wherein the first adhesive film layer and/or the substrate has a plurality of openings and the positions of the plurality of openings are configured to be connected to the battery The position of the electrode wire on the chip coincides so as to join the solder ribbon to the electrode wire from the opening (see Figure 9); Wherein in step (A), the first adhesive film layer and the substrate are bonded by, for example, but not limited to, coating (such as but not limited to screen printing coating, spin coating, slit coating, dip coating, extrusion coating) or heating. Ways (such as but not limited to roll-to-roll infrared heating, roll-to-roll hot air heating) are connected to each other; Wherein, in step (B), the joining method of the battery sheet and the first layer can be, for example, but not limited to, heating joining. The heating joining temperature is preferably 60 to 250°C, more preferably 100 to 150°C, Or joined by adhesive, and optionally through partial secondary joining through a heater, such as but not limited to, to improve the joining between the welding tape and the electrode wire; and Wherein, the soldering tape can be joined to the electrode wires on the battery sheet by, for example, but not limited to, heating bonding and/or adhesive bonding and/or welding. Preferably, the soldering tape is only heated bonding and/or adhesive bonding. The method is precisely aligned with the electrode wire on the battery sheet, and it is better that the solder ribbon is precisely aligned with the electrode wire on the battery sheet by heating bonding, wherein the heating temperature is preferably 60 to 250 °C, more preferably 100 to 150°C.
根據本發明之一具體實施態樣，該電池片與該第一層的接合方式為加熱接合，其中加熱下壓該電池片與該第一層時，可將該第一層中的金屬粒子壓破，使該電池片上的該電極線與該焊帶緊密接合在一起，其中加熱溫度較佳為60至250°C，更佳為100至150°C。使用上述方法製備根據本發明之太陽能電池單元，可以降低焊帶與電池片上的電極線接和時產生的應力作用，例如但不限於熱應力、面內應力。According to a specific embodiment of the present invention, the bonding method of the battery sheet and the first layer is heating bonding, wherein when the battery sheet and the first layer are pressed under heating, the metal particles in the first layer can be pressed. It is broken to make the electrode wire on the battery sheet and the welding tape tightly joined together, wherein the heating temperature is preferably 60 to 250°C, more preferably 100 to 150°C. Using the above method to prepare the solar cell unit according to the present invention can reduce the stress generated when the welding ribbon is connected to the electrode on the cell sheet, such as but not limited to thermal stress and in-plane stress.
根據本發明之一具體實施態樣，該方法進一步包含將第二膠膜層與電池片的另一側接合，例如但不限於以加熱的方式接合，其中接合溫度較佳在60至250°C，更佳100至150°C。According to a specific embodiment of the present invention, the method further includes bonding the second adhesive film layer to the other side of the cell, for example but not limited to bonding by heating, wherein the bonding temperature is preferably 60 to 250°C , More preferably 100 to 150°C.
根據本發明之一具體實施態樣，該第二膠膜層包覆焊帶。According to a specific implementation aspect of the present invention, the second adhesive film layer covers the welding tape.
太陽能電池模組Solar cell module
根據本發明的太陽能電池模組可藉由將單片電池片以上述太陽能電池單元的製備方法加工為太陽能電池單元，再以習知的太陽能電池模組封裝製程製備為太陽能電池模組。在習知的太陽能電池模組中，電池片與焊帶串接為電池片串(如圖10所示)，再將電池片串焊接並經封裝後製成習知的太陽能電池模組(如圖11所示)。The solar cell module according to the present invention can be processed into a solar cell unit by a single cell using the above-mentioned solar cell unit manufacturing method, and then prepared into a solar cell module by a conventional solar cell module packaging process. In the conventional solar cell module, the cells and the welding ribbon are connected in series to form a cell string (as shown in Figure 10), and then the cell string is welded and packaged to form a conventional solar cell module (such as Shown in Figure 11).
根據本發明的太陽能電池模組包含複數個太陽能電池片串、其中該複數個太陽能電池片串，如圖12或圖13所示，包含上述根據本發明的太陽能電池單元。The solar cell module according to the present invention includes a plurality of solar cell strings, wherein the plurality of solar cell strings, as shown in FIG. 12 or FIG. 13, includes the above-mentioned solar cell unit according to the present invention.
根據本發明的一個具體實施態樣，太陽能電池模組進一步包含前蓋板(12)、第一封裝膠膜(14)、第二封裝膠膜(14)及背板(13)。According to a specific embodiment of the present invention, the solar cell module further includes a front cover (12), a first packaging adhesive film (14), a second packaging adhesive film (14), and a back plate (13).
根據本發明的一個具體實施態樣，太陽能電池模組依序包含前蓋板(12)、第一封裝膠膜(14)、如圖12所示的太陽能電池片串、第二封裝膠膜(14)及背板(13)，且其中該前蓋板(12)及該第一封裝膠膜(14)間較佳進一步包含光學薄膜，該光學薄膜較佳與該前蓋板形成一個聚光的結構，例如但不限於非涅爾透鏡結構。According to a specific implementation aspect of the present invention, the solar cell module sequentially includes a front cover (12), a first packaging adhesive film (14), a string of solar cells as shown in FIG. 12, and a second packaging adhesive film ( 14) and a back plate (13), wherein the front cover plate (12) and the first encapsulating film (14) preferably further include an optical film, and the optical film preferably forms a condensing light with the front cover plate The structure, such as but not limited to a non-Nell lens structure.
前蓋板(12)Front cover (12)
根據本發明之太陽能電池模組所使用的前蓋板材料無特殊限制，可為本發明所屬技術中具有通常知識者所能輕易選用者，例如但不限於高透光高分子塑料或高透光鋼化玻璃，較佳為高透光高分子塑料。由於本發明之太陽能電池單元具有更強對抗機械應力的能力，因此可降低對前蓋板強度的需求，從而減低前蓋板的厚度，亦可視情況使用薄型塑料薄膜材料，例如但不限於ETFE膜材、PVDF膜材、PTFE膜材、有機矽膠膜材、PET膜材或上述膜材雙雙接合而成的複合膜材，來當前蓋板的保護膜，達到對太陽能電池模組能薄型化、輕量化及無框化等目的。The front cover material used in the solar cell module according to the present invention is not particularly limited, and can be easily selected by those with ordinary knowledge in the technology of the present invention, such as but not limited to high light-transmitting polymer plastics or high light-transmitting materials. Tempered glass is preferably high-light-transmitting polymer plastic. Since the solar cell unit of the present invention has a stronger ability to resist mechanical stress, it can reduce the need for the strength of the front cover, thereby reducing the thickness of the front cover, and can also use thin plastic film materials, such as but not limited to ETFE film. Material, PVDF film material, PTFE film material, organic silicon film material, PET film material, or a composite film material formed by double bonding of the above-mentioned film materials. Quantification and unframed purposes.
背板(13)Backplane (13)
根據本發明之太陽能電池模組所使用的背板材料無特殊限制，可為本發明所屬技術中具有通常知識者所能輕易選用者，例如但不限於高分子塑料。The back sheet material used in the solar cell module according to the present invention is not particularly limited, and can be easily selected by those with ordinary knowledge in the technology of the present invention, such as but not limited to polymer plastics.
第一及第二封裝膠膜(14)The first and second packaging film (14)
根據本發明之太陽能電池模組所使用的封裝膠膜材料無特殊限制，可為本發明所屬技術中具有通常知識者所能輕易選用者，例如但不限於EVA(乙烯醋酸乙烯酯共聚合樹脂)、POE(聚烯烴彈性體樹脂)、PVB(聚乙烯醇縮丁醛樹脂)、有機矽膠樹脂、環氧樹脂膠、壓克力膠等。The encapsulating film material used in the solar cell module according to the present invention is not particularly limited, and can be easily selected by those with ordinary knowledge in the art of the present invention, such as but not limited to EVA (ethylene vinyl acetate copolymer resin) , POE (polyolefin elastomer resin), PVB (polyvinyl butyral resin), silicone resin, epoxy resin, acrylic, etc.
相較於習知太陽能電池模組，焊帶僅以封裝膠膜包覆(圖11)，根據本發明的太陽能電池模組之焊帶如圖14或圖15所示，額外以第一膠膜層包覆並且在背板及電池片間至少存在一層不同於封裝膠膜材料之層作為基板。Compared with the conventional solar cell module, the soldering tape is only covered with an encapsulating adhesive film (Figure 11). The soldering tape of the solar cell module according to the present invention is shown in Figure 14 or 15, with a first adhesive film added. Layer coating and there is at least one layer different from the packaging film material as the substrate between the backplane and the battery sheet.
實例Instance
隱裂不易以肉眼觀察。因此，技術領域中常使用電致發光（Electroluminescence；EL）檢測太陽能電池或組件的內部缺陷。EL利用晶體矽的電致發光原理，通過高解析度的紅外相機拍攝組件獲得近紅外圖像，可由該圖像簡單有效地檢測隱裂。在EL影像中呈現黑色不發光的區域，稱「壞死區」。壞死區無法發電，因此有壞死區的電池片產出的電流會比較小，導致整片模組的發電功率降低。電池片的壞死區域太大時，不只會讓電池片的功率下降，而且在電池片串成串列後損失會再放大。壞死區不只會使發電降低，若面積過大還會造成過熱而使模組燒毀。The crack is not easy to observe with the naked eye. Therefore, electroluminescence (EL) is often used in the technical field to detect internal defects of solar cells or components. EL uses the electroluminescence principle of crystalline silicon to obtain near-infrared images through high-resolution infrared camera shooting components, which can be used to easily and effectively detect cracks. The black area that does not emit light in the EL image is called the "necrotic area". The necrotic area cannot generate electricity, so the current produced by the cell with the necrotic area will be relatively small, resulting in a reduction in the power generation of the entire module. When the necrotic area of the cell is too large, not only the power of the cell is reduced, but the loss will be amplified again after the cell is connected in series. The necrotic area will not only reduce the power generation, if the area is too large, it will also cause overheating and burn the module.
測試實驗：落球衝擊測試Test experiment: Falling ball impact test
實驗用鋼球：重量為227克，球體直徑為3.8公分。Experimental steel ball: The weight is 227 grams, and the diameter of the ball is 3.8 cm.
落球衝擊測試高度：50公分。Falling ball impact test height: 50 cm.
樣品一(比較例)：透明塑膠前蓋板(300微米)/POE膜(500微米)/晶體矽太陽能電池片(150微米)/POE膜(500微米)/塑膠光伏背板(350微米)。Sample 1 (comparative example): transparent plastic front cover (300 microns)/POE film (500 microns)/crystalline silicon solar cells (150 microns)/POE film (500 microns)/plastic photovoltaic backsheet (350 microns).
樣品二(發明例)：透明塑膠前蓋板(300微米)/POE膜(500微米)/電池單元A(480微米)/POE膜(500微米)/塑膠光伏背板(350微米)，其中電池單元A的結構為晶體矽太陽能電池片(150微米)/第一膠膜層-POE(300微米)/不鏽鋼膜基板(30微米)。Sample 2 (invention example): transparent plastic front cover (300 microns)/POE film (500 microns)/cell A (480 microns)/POE film (500 microns)/plastic photovoltaic backplane (350 microns), in which the battery The structure of unit A is crystalline silicon solar cell (150 microns)/first adhesive film layer-POE (300 microns)/stainless steel film substrate (30 microns).
樣品三(發明例)：透明塑膠前蓋板(300微米)/POE膜(500微米)/電池單元B(500微米)/POE膜(500微米)/塑膠光伏背板(350微米)，其中電池單元B的結構為晶體矽太陽能電池片(150微米)/第一膠膜層-POE(300微米)/不鏽鋼膜基板(50微米)。Sample three (invention example): transparent plastic front cover (300 microns)/POE film (500 microns)/cell B (500 microns)/POE film (500 microns)/plastic photovoltaic backplane (350 microns), of which the battery The structure of unit B is crystalline silicon solar cell (150 microns)/first adhesive film layer-POE (300 microns)/stainless steel film substrate (50 microns).
測試結果摘要至下表1：
樣品一(比較例)承受落球重力衝擊的能力弱，使晶體矽電池片因外部應力形成相對大面積的隱裂區域，其中黑色壞死區的佔比面積大。Sample 1 (comparative example) has a weak ability to withstand the gravitational impact of a falling ball, causing the crystalline silicon cell to form a relatively large area of cracked area due to external stress, of which the black necrotic area accounts for a large area.
樣品二及樣品三(發明例)為根據本發明的電池單元(即：將電池片與第一膠膜層及基板(30微米/50微米不銹鋼薄板材料)組合)，透過落球重力衝擊測試，可以發現根據本發明電池單元中的晶體矽電池片在遭受外部應力作用後形成相對小面積的隱裂區域，其中黑色壞死區的佔比面積也小。
由上述結果可知，根據本發明的電池單元能承受比單獨晶體矽電池片更強的外部應力，且降低晶體矽電池片隱裂發生的機率及減少黑色壞死區的面積。使用本發明的電池單元的太陽能電池模組，可降低因受外部應力產生隱裂的機率，從而降低功率衰減及提高使用壽命。From the above results, it can be seen that the battery cell according to the present invention can withstand stronger external stress than a single crystalline silicon cell, and reduce the probability of cracking of the crystalline silicon cell and reduce the area of the black necrotic zone. The solar battery module using the battery unit of the present invention can reduce the probability of cracking due to external stress, thereby reducing power attenuation and improving service life.
由上述結果可知，根據本發明的電池單元透過第一膠膜層及基板來提昇單一電池片抗應力的能力，且基板的厚度也具有抗應力的能力，厚度越厚改善的效果也越加明顯。It can be seen from the above results that the battery cell according to the present invention improves the stress resistance of a single cell through the first adhesive film layer and the substrate, and the thickness of the substrate also has the ability to resist stress. The thicker the thickness, the more obvious the improvement effect will be. .
1:電池片 2:電池片正面 3:電池片背面 4:上電極線 5:下電極線 6:第一層(第一防隱裂薄膜層) 7:第一膠膜層(第一防隱裂膠膜層) 8:基板(防隱裂基板) 9:焊帶 10:第二膠膜層(第二防隱裂膠膜層) 11:光學薄膜 12:前蓋板 13:背板 14:封裝膠膜 15:開孔位 1: Cell 2: The front of the cell 3: The back of the battery 4: Upper electrode line 5: Lower electrode line 6: The first layer (the first anti-cracking film layer) 7: The first adhesive film layer (the first anti-cracking adhesive film layer) 8: Substrate (anti-crack substrate) 9: Welding ribbon 10: The second adhesive film layer (the second anti-cracking adhesive film layer) 11: Optical film 12: Front cover 13: Backplane 14: Encapsulation film 15: Opening position
下文將簡要地說明為了描述本申請實施例或現有技術所必要的附圖。附圖僅只是本申請中的部分實施例。對本發明所屬技術領域中具有通常知識者而言，在不需要過度實驗的前提下，依然可以根據這些附圖中所例示的結構來獲得其他實施例。 圖1：根據本發明的太陽能電池單元，其包含第一防隱裂膠膜層及防隱裂基板。 圖2：如圖1之太陽能電池單元，其中所涉第一膠膜層包覆焊帶。 圖3：如圖1之太陽能電池單元，其進一步包含第二膠膜層。 圖4：如圖3之太陽能電池單元，其中所涉之膠膜層包覆焊帶。 圖5：如圖3之太陽能電池單元，其中所涉之第二膠膜層以光學薄膜覆蓋。 圖6：先前技術中焊帶與電池片直接透過焊接接合。 圖7：根據本發明電池單元的製備方法之一具體態樣，其中焊帶先與電池片上的電極線對齊，再將防隱裂薄膜層與該電池片接合，其中經對齊的該焊帶及該電極線因該防隱裂薄膜層與該電池片接合而接合。 圖8：根據本發明電池單元的製備方法之另一具體態樣，其中依據電池片上電極線的尺寸及間距，焊帶先與防隱裂薄膜層對齊，再將與該電池片與該防隱裂薄膜層接合，其中該焊帶及該電極線因該防隱裂薄膜層與該電池片接合而接合。 圖9：根據本發明電池單元的製備方法之又一具體態樣，其中防隱裂薄膜層與電池片先接合，其中該防隱裂薄膜層上具有複數個開孔，該複數個開孔的位置經配置與該電池片上的電極線位置重合以便自該開孔處將焊帶與該電極線接合。 圖10：包含先前技術太陽能電池片之電池片串。 圖11：包含圖10電池片串之太陽能電池模組。 圖12：包含本發明之圖2太陽能電池單元的電池片串。 圖13：包含本發明之圖4太陽能電池單元的電池片串。 圖14：包含圖12太陽能電池片串之太陽能電池模組。 圖15：包含圖13太陽能電池片串之太陽能電池模組。 圖16：根據先前技術之太陽能電池片受衝擊測試前及後之EL圖像，其中左圖為受衝擊測試之前的EL圖像及右圖為受衝擊測試之後的EL圖像。 圖17：根據本發明之太陽能電池單元受衝擊測試前及後之EL圖像，其中左圖為受衝擊測試之前的EL圖像及右圖為受衝擊測試之後的EL圖像。 圖18：根據本發明之另一太陽能電池單元受衝擊測試前及後之EL圖像，其中左圖為受衝擊測試之前的EL圖像及右圖為受衝擊測試之後的EL圖像。 Hereinafter, the drawings necessary to describe the embodiments of the present application or the prior art will be briefly described. The drawings are only part of the embodiments in this application. For those with ordinary knowledge in the technical field to which the present invention belongs, other embodiments can still be obtained based on the structures illustrated in these drawings without undue experimentation. Fig. 1: The solar cell unit according to the present invention includes a first anti-cracking adhesive film layer and an anti-cracking substrate. Figure 2: The solar cell unit shown in Figure 1, in which the first film layer covered by the solder ribbon. Figure 3: The solar cell unit as shown in Figure 1, further comprising a second adhesive film layer. Figure 4: The solar cell unit shown in Figure 3, in which the film layer involved is covered with a solder ribbon. Figure 5: The solar cell unit shown in Figure 3, where the second adhesive film layer involved is covered with an optical film. Figure 6: In the prior art, the welding ribbon and the cell are directly joined by welding. Figure 7: According to a specific aspect of the method for preparing the battery cell of the present invention, the welding tape is first aligned with the electrode lines on the battery sheet, and then the anti-cracking film layer is joined to the battery sheet, wherein the aligned welding tape and The electrode wire is joined because the anti-cracking film layer is joined to the battery sheet. Figure 8: According to another specific aspect of the preparation method of the battery cell of the present invention, according to the size and spacing of the electrode lines on the battery sheet, the welding tape is first aligned with the anti-cracking film layer, and then the battery sheet and the anti-hidden film are aligned. The cracked film layer is joined, wherein the welding tape and the electrode wire are joined due to the joint of the anti-cracking film layer and the battery sheet. Figure 9: According to another specific aspect of the method for preparing the battery cell of the present invention, the anti-cracking film layer is first joined to the battery, wherein the anti-cracking film layer has a plurality of openings, and the plurality of openings The position is configured to coincide with the position of the electrode wire on the battery sheet so as to join the welding ribbon and the electrode wire from the opening. Figure 10: Cell strings containing prior art solar cells. Figure 11: The solar cell module containing the cell string of Figure 10. Figure 12: Cell string containing the solar cell unit of Figure 2 of the present invention. Figure 13: Cell string containing the solar cell of Figure 4 of the present invention. Figure 14: The solar cell module including the solar cell string of Figure 12. Figure 15: The solar cell module including the solar cell string of Figure 13; Figure 16: EL images before and after the impact test of the solar cell according to the prior art. The left image is the EL image before the impact test and the right image is the EL image after the impact test. Figure 17: EL images before and after the impact test of the solar cell according to the present invention, where the left image is the EL image before the impact test and the right image is the EL image after the impact test. Fig. 18: EL images of another solar cell unit according to the present invention before and after the impact test. The left image is the EL image before the impact test and the right image is the EL image after the impact test.
1:電池片 1: Cell
2:電池片正面 2: The front of the cell
3:電池片背面 3: The back of the battery
4:上電極線 4: Upper electrode line
5:下電極線 5: Lower electrode line
6:第一層/第一防隱裂薄膜層 6: The first layer / the first anti-cracking film layer
7:第一膠膜層/第一防隱裂膠膜層 7: The first adhesive film layer / the first anti-cracking adhesive film layer
8:基板/防隱裂基板 8: Substrate/Anti-crack substrate
Claims (12)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW109122157A TWI746034B (en) | 2020-06-30 | 2020-06-30 | Solar cell unit, process for producing the same and solar cell assembly comprising the same |
| CN202011578144.7A CN113948585A (en) | 2020-06-30 | 2020-12-28 | Solar cell unit, preparation method thereof and solar cell module comprising same |
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| Application Number | Priority Date | Filing Date | Title |
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| TW109122157A TWI746034B (en) | 2020-06-30 | 2020-06-30 | Solar cell unit, process for producing the same and solar cell assembly comprising the same |
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| Publication Number | Publication Date |
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| TWI746034B true TWI746034B (en) | 2021-11-11 |
| TW202203475A TW202203475A (en) | 2022-01-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201303378A (en) * | 2011-03-14 | 2013-01-16 | Daikin Ind Ltd | Light-gathering film and solar battery module |
| TW201312771A (en) * | 2011-09-05 | 2013-03-16 | Tainergy Tech Co Ltd | Solar cell module |
| CN207183291U (en) * | 2017-09-01 | 2018-04-03 | 上海海优威新材料股份有限公司 | Two-side transparent photovoltaic module structure with reflection bar |
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2020
- 2020-06-30 TW TW109122157A patent/TWI746034B/en active
- 2020-12-28 CN CN202011578144.7A patent/CN113948585A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201303378A (en) * | 2011-03-14 | 2013-01-16 | Daikin Ind Ltd | Light-gathering film and solar battery module |
| TW201312771A (en) * | 2011-09-05 | 2013-03-16 | Tainergy Tech Co Ltd | Solar cell module |
| CN207183291U (en) * | 2017-09-01 | 2018-04-03 | 上海海优威新材料股份有限公司 | Two-side transparent photovoltaic module structure with reflection bar |
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| CN113948585A (en) | 2022-01-18 |
| TW202203475A (en) | 2022-01-16 |
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