WO2017133571A1 - 光伏组件 - Google Patents

光伏组件 Download PDF

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Publication number
WO2017133571A1
WO2017133571A1 PCT/CN2017/072413 CN2017072413W WO2017133571A1 WO 2017133571 A1 WO2017133571 A1 WO 2017133571A1 CN 2017072413 W CN2017072413 W CN 2017072413W WO 2017133571 A1 WO2017133571 A1 WO 2017133571A1
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WO
WIPO (PCT)
Prior art keywords
photovoltaic module
sheet layer
layer
battery sheet
holes
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PCT/CN2017/072413
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English (en)
French (fr)
Inventor
黄猛
梁荣鑫
任鹏
唐文强
南树功
刘霞
Original Assignee
珠海格力电器股份有限公司
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Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Priority to US16/073,557 priority Critical patent/US20190035962A1/en
Priority to AU2017215677A priority patent/AU2017215677B2/en
Priority to EP17746891.5A priority patent/EP3413358A4/en
Priority to CA3012909A priority patent/CA3012909C/en
Publication of WO2017133571A1 publication Critical patent/WO2017133571A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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
    • H01L31/052Cooling means directly associated or integrated with the PV cell, e.g. integrated Peltier elements for active cooling or heat sinks directly associated with the PV cells
    • H01L31/0521Cooling means directly associated or integrated with the PV cell, e.g. integrated Peltier elements for active cooling or heat sinks directly associated with the PV cells using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/048Encapsulation of modules
    • H01L31/0488Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/02Details
    • H01L31/0216Coatings
    • H01L31/02161Coatings for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/02167Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/18Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/186Particular post-treatment for the devices, e.g. annealing, impurity gettering, short-circuit elimination, recrystallisation
    • H01L31/1868Passivation
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40Thermal components
    • H02S40/42Cooling means
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/80Constructional details
    • H10K30/88Passivation; Containers; Encapsulations
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/549Organic PV cells

Definitions

  • the present invention relates to photovoltaic technology, and more particularly to a photovoltaic module.
  • photovoltaic technology is a technology that converts the sun's light energy into electrical energy.
  • photovoltaic modules are a core part of solar power generation.
  • Common double-glass photovoltaic modules are usually composed of aluminum frame, tempered glass, EVA (Ethylene Vinyl Acetate), battery sheet, Tedlar film, etc. EVA, cell sheet and Tedlar film are set on the front side tempered glass. Between the back plate and the tempered glass, the two tempered glass are restrained and fixed by the outer ring through the aluminum frame.
  • the existing double-glass PV modules have the following shortcomings:
  • the present invention provides a photovoltaic module comprising: double glazing a panel and a cell sheet layer encapsulated between the double-glazed panels, wherein a plurality of through holes are formed on the double-glazed panel and the battery sheet layer to form a plurality of through-holes integrally formed on the photovoltaic module A fluid passage, at least a portion of the through holes being located in a gap formed between the battery sheets in the cell sheet layer.
  • the plurality of through holes form a plurality of rows of through holes, and are distributed at gap positions between adjacent columns in the plurality of columns of the cells.
  • the plurality of through holes form an evenly arranged array on a plane of the photovoltaic module.
  • the aperture size of the through hole is smaller than the gap size of each of the battery sheets in the battery sheet layer.
  • an adhesive layer for encapsulating the battery sheet layer between the double-glazed panels is disposed between the double-glazed panel and the battery sheet layer, and the adhesive layer connects the battery
  • the individual cells of the slice are isolated from the plurality of vias.
  • the bonding layer is an EVA layer, a PVB layer or a PDMS layer.
  • the double glazing panel comprises a first glass panel on one side of the battery sheet layer and a second glass panel on the other side of the battery sheet layer, in the battery sheet layer and the second layer A polyvinyl fluoride film is also disposed between the glass panels.
  • outer frame of the double-glazed panel directly constitutes an outer frame of the photovoltaic module.
  • the present invention provides a plurality of fluid passages integrally formed on the photovoltaic module in which the battery sheet layer is encapsulated by the double-layer glass panel, thereby realizing the heat dissipation effect on the battery sheet and solving the problem that the temperature of the photovoltaic module is too high and the heat is severe. In turn, the power generation efficiency and service life of the photovoltaic module are improved.
  • FIG. 1 is a schematic structural view of an embodiment of a photovoltaic module of the present invention.
  • FIG. 2 is a schematic structural view of a battery sheet layer in an embodiment of a photovoltaic module of the present invention.
  • FIG. 3 is a schematic structural view of another embodiment of a photovoltaic module of the present invention.
  • FIG. 1 is a schematic structural view of an embodiment of a photovoltaic module of the present invention.
  • the photovoltaic module comprises: a double-glazed panel and a battery sheet layer 2 encapsulated between the double-glazed panels, and a plurality of through holes are disposed on the double-glazed panel and the battery sheet layer 2, At least a portion of the through holes are located at a gap position formed between the battery sheets 21 in the battery sheet layer 2 to form a plurality of fluid passages integrally formed on the photovoltaic module.
  • the through holes are disposed at gap positions formed between the battery sheets 21 in the battery sheet layer 2, and the through holes may be disposed between the battery sheets and the edges of the photovoltaic modules, so that all the through holes may be disposed between the battery sheets.
  • the gap position can also be set between the cell sheets and the gap position between the edges of the photovoltaic modules.
  • the integrally penetrating fluid passage formed on the photovoltaic module can allow flowing gas or fluid liquid (such as air, water, oil, etc.) to pass through, and use these fluids to carry away the heat radiated from the battery sheet 21, thereby achieving the cooling and cooling effect of the photovoltaic module. Improve power generation efficiency and service life.
  • these fluid passages can also achieve a pressure relief function, that is, when extreme conditions such as high winds, heavy rain, heavy snow, etc., these fluid passages can become pressure relief passages for strong winds, heavy rains, and heavy snow, allowing air, water, snow crystals, etc. to pass.
  • the fluid passage avoids accumulation and cannot release pressure in time, so that the photovoltaic module is not damaged due to excessive pressure and shortens the service life.
  • the shape of the through hole may be a circular hole, or a through hole of various shapes such as a polygonal hole or an elliptical hole may be selected.
  • the number of through holes is plural, so that good heat dissipation and pressure relief can be obtained, and the distribution of the plurality of through holes can form a plurality of rows of through holes, and is distributed in the plurality of rows of cells 21
  • the position of the gap between the adjacent columns is such that it does not affect the normal use of the battery sheet 21, and the heat dissipation effect can be evenly distributed between the respective battery sheets.
  • the plurality of through holes form an evenly arranged array on the plane of the photovoltaic module, that is, an equidistant matrix arrangement.
  • the number of arrays in the array can be adjusted depending on the size and heat dissipation requirements of the photovoltaic module.
  • the through hole size is smaller than the gap size of each of the battery sheets 21 in the battery sheet layer 2 regardless of the type of through hole.
  • the size of all the through holes is not particularly smaller than the gap size between each of the battery sheets 21 in the battery sheet layer 2, because the gap size of each of the battery sheets 21 may be inconsistent, and the gap is The larger the size, the larger the through hole size, and the smaller the smaller the size of the through hole, so it should be understood as the gap size between the corresponding position and the size of the through hole at the position. relationship.
  • the length and width need to be slightly smaller than the distance between adjacent cells, and for a circular hole, the hole diameter needs to be slightly smaller than the adjacent cell. The distance between them. This enables the through holes to not interfere with the cell.
  • FIG. 2 shows an example of the structure in which a portion is taken from the battery sheet layer 2.
  • the battery sheet layer 2 includes a plurality of battery sheets 21 arranged in a predetermined geometric relationship.
  • the battery sheets 21 in FIG. 2 have a total of 6*6, and the battery sheets 21 of each column are connected to the positive electrode of the adjacent battery sheets through the silver grid lines.
  • the negative electrodes are formed in series, and are connected in parallel at the lower edge of the battery assembly through a bus bar (not shown) to form an output. The lead is led out to the junction box on the back of the PV module.
  • the through hole 2a of the battery sheet layer 2 is formed in a gap formed by the battery sheet 21 (for example, a gap between every four adjacent battery sheets 21), and according to different forms and different arrangements of the battery sheets, the through holes 2a are also It can be placed in the gap between two or three cells.
  • the photovoltaic module encapsulates the battery sheet layer 2 with a double-glazed panel.
  • the double-glazed panel includes the first glass panel 1 and the location on the side of the battery sheet layer 2.
  • the second glass panel 3 on the other side of the battery sheet layer 2, wherein the through hole 1a provided on the first glass panel 1 and the through hole 3a provided in the second glass panel 3 can be through the through hole of the battery sheet layer 2 2a corresponds to form an integral through fluid passage.
  • the first glass panel 1 and the second glass panel 3 are preferably tempered glass, and the tempered glass can ensure The strength and waterproof properties of the photovoltaic modules can be selected from other types of glass as needed.
  • the present invention further reduces the weight of the photovoltaic module by providing through holes in the double glazing panel compared to the existing double glass photovoltaic modules without through holes.
  • the adhesive layer 4 may be used for encapsulation between the double-glazed panel and the battery sheet layer 2, and the double-layer glass panel and the battery sheet layer are bonded by bonding. Get up to form the whole of the PV module.
  • the battery sheet layer may also be packaged by other forms, such as a plurality of connecting columns between the double glazing panels.
  • the bonding layer 4 can also isolate the respective cell sheets 21 of the cell sheet layer 2 from the plurality of via holes 2a.
  • a through hole 4a is also provided on the adhesive layer 4 at a position corresponding to the through hole of the double glazing panel and the cell sheet layer, so that the photovoltaic module forms an integrally through fluid passage.
  • the adhesive layer 4 can adopt an EVA layer, which is a thermosetting film-like hot melt adhesive. When it is heated to a certain temperature, physical and chemical changes occur under the action of the laminator to adhere the glass and the battery sheet. EVA has excellent adhesion properties after heat curing, taking into account structural stability and waterproof function. Good strength and water resistance can be obtained by double-layer tempered glass and cell sheets bonded by EVA.
  • other thermosetting film-like hot melt adhesives can also be used.
  • other bonding layers formed by materials capable of bonding such as a thermoplastic PVB (polyvinyl butyral) layer or a PDMS (polydimethylsiloxane) layer, may also be employed.
  • FIG. 3 is a schematic structural view of another embodiment of a photovoltaic module of the present invention.
  • the present embodiment further provides a polyvinyl fluoride film 5, such as a Tedlar film, between the battery sheet layer 2 and the second glass panel 3, and the polyvinyl fluoride film 5 can pass through the bonding layer 4. Bonding to the battery sheet layer and bonding of the polyvinyl fluoride film 5 and the second glass panel 3 by silica gel.
  • the polyvinyl fluoride film 5 has good water vapor permeability, high strength, high temperature resistance and excellent electrical properties, and can improve various aspects of the performance of the photovoltaic module.
  • a through hole is also provided in the polyvinyl fluoride film 5 to form an integrally through fluid passage.
  • the outer frame of the double-glazed panel can be directly formed into the outer frame of the photovoltaic module, and the frame made of aluminum alloy or other metal materials is not used. Since the glass is an insulator, it can be minimized or Avoid the loss of electrons to the periphery of the edge, effectively suppress the PID (potential induced attenuation) effect of the photovoltaic module, and improve the power generation efficiency of the photovoltaic module.

Abstract

一种光伏组件,包括:双层玻璃面板和在双层玻璃面板之间封装的电池片层(2),在双层玻璃面板和电池片层(2)上均设有多个通孔,以形成在光伏组件上整体贯通的多个流体通道,至少部分通孔位于电池片层(2)中电池片(21)之间形成的间隙。在由双层玻璃面板封装电池片层的光伏组件上设置整体贯通的多个流体通道,可以实现对电池片的散热效果,解决光伏组件温度过高、发热严重的问题,进而使光伏组件的发电效率和使用寿命得以提升。

Description

光伏组件
本申请要求于2016年2月1日提交中国专利局、申请号为201610069481.0、发明名称为“光伏组件”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及光伏技术,尤其涉及一种光伏组件。
背景技术
太阳能作为一种干净、无污染、取之不尽用之不竭的能源,光伏技术就是将太阳的光能转换为电能的技术。在光伏领域中,光伏组件是太阳能发电支架中的核心部分。常见的双玻光伏组件通常由铝框、钢化玻璃、EVA(Ethylene Vinyl Acetate,乙烯-醋酸乙烯共聚物)、电池片、Tedlar膜等组成,EVA、电池片和Tedlar膜被设置在前侧钢化玻璃和背板钢化玻璃之间,再通过铝框对两块钢化玻璃进行外圈的约束固定。
现有的双玻光伏组件存在以下的不足:
1、阳光长时间直照光伏组件会使背板玻璃发热严重、温度过高,进而导致光伏组件发电效率下降,同时也会对光伏组件的使用寿命造成不利影响;
2、在环境恶劣条件下,例如大风、大雨、大雪等条件下,光伏组件不能及时泄压,从而导致受损,缩短组件寿命;
3、电池片所产生的电子会向四周的铝框流失,导致光伏组件的发电效率下降。
发明内容
本发明的目的是提出一种光伏组件,能够提高光伏组件的发电效率。
为实现上述目的,本发明提供了一种光伏组件,包括:双层玻璃 面板和在双层玻璃面板之间封装的电池片层,在所述双层玻璃面板和所述电池片层上均设有多个通孔,以形成在所述光伏组件上整体贯通的多个流体通道,至少部分所述通孔位于所述电池片层中电池片之间形成的间隙。
进一步的,所述多个通孔形成多列通孔,且分布在多列电池片中相邻列之间的间隙位置。
进一步的,所述多个通孔在所述光伏组件所在平面上形成均匀排布的阵列。
进一步的,所述通孔的孔径尺寸小于所述电池片层中各个电池片的间隙尺寸。
进一步的,在所述双层玻璃面板与所述电池片层之间设有用于在所述双层玻璃面板之间封装所述电池片层的粘接层,所述粘接层将所述电池片层的各个电池片与所述多个通孔隔离。
进一步的,所述粘接层为EVA层、PVB层或者PDMS层。
进一步的,所述双层玻璃面板包括位于所述电池片层一侧的第一玻璃面板和位于所述电池片层另一侧的第二玻璃面板,在所述电池片层与所述第二玻璃面板之间还设有聚氟乙烯薄膜。
进一步的,所述双层玻璃面板的外边框直接构成所述光伏组件的外边框。
基于上述技术方案,本发明在由双层玻璃面板封装电池片层的光伏组件上设置整体贯通的多个流体通道,可以实现对电池片的散热效果,解决光伏组件温度过高、发热严重的问题,进而使光伏组件的发电效率和使用寿命得以提升。
附图说明
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1为本发明光伏组件的一实施例的结构示意图。
图2为本发明光伏组件实施例中电池片层的结构示意图。
图3为本发明光伏组件的另一实施例的结构示意图。
具体实施方式
下面通过附图和实施例,对本发明的技术方案做进一步的详细描述。
如图1所示,为本发明光伏组件的一实施例的结构示意图。在本实施例中,光伏组件包括:双层玻璃面板和在双层玻璃面板之间封装的电池片层2,在双层玻璃面板和所述电池片层2上均设有多个通孔,以形成在所述光伏组件上整体贯通的多个流体通道,至少部分所述通孔位于所述电池片层2中电池片21之间形成的间隙位置。
为了形成整体贯通的流体通道,需要在光伏组件的每层结构中均设置通孔,而通孔设置的目的之一在于方便流体通过,以便能够携带走电池片21所散发出的热量,因此适合将通孔设置在电池片层2中电池片21之间形成的间隙位置,考虑到通孔也可以设置在电池片与光伏组件边缘之间,因此全部通孔可以均设在电池片之间的间隙位置,也可以设置在电池片之间以及与光伏组件边缘之间的间隙位置。
在光伏组件上形成的整体贯通的流体通道可以允许流动气体或者流体液体(例如空气、水、油等)通过,利用这些流体将电池片21散发的热量携带走,实现光伏组件的降温冷却作用,提高发电效率和使用寿命。此外,这些流体通道还能够实现泄压功能,即当出现大风、大雨、大雪等极端恶劣条件时,这些流体通道可以成为大风、大雨、大雪的泄压通道,使空气、水、雪晶等通过流体通道,避免累积而无法及时泄压,使得光伏组件不至于因压力过大而受损,缩短使用寿命。
通孔的形态可选择圆形孔,也可以选择多边形孔、椭圆孔等各种形态的通孔。通孔在数量上为多个,以便能够获得良好的散热和泄压作用,而且多个通孔的分布可形成多列通孔,且分布在多列电池片21 中相邻列之间的间隙位置,这样既不会影响到电池片21的正常使用,也能够使得散热作用均匀分布到各个电池片之间。优选多个通孔在所述光伏组件所在平面上形成均匀排布的阵列,即等间距的矩阵式排布。例如图1中排列为5*9的45个通孔。根据光伏组件的尺寸和散热要求,可以调整阵列中排列的数量。在通孔自身的尺寸上,无论是哪类形态的通孔,都优选通孔尺寸小于电池片层2中各个电池片21的间隙尺寸。需要说明的是,此处并非特指所有通孔的尺寸均要小于电池片层2中每个电池片21之间的间隙尺寸,这是因为各个电池片21的间隙尺寸可能并不一致,那么间隙尺寸大些的位置则通孔尺寸也相应大些,间隙尺寸小些的位置则通孔尺寸也相应小些,因此应理解为相应位置的间隙尺寸与设置在该位置的通孔尺寸之间的关系。
对于多边形孔来说,例如矩形孔,则其长宽需要略小于该处相邻电池片之间的距离,而对于圆形孔来说,则其孔直径需要略小于该处相邻电池片之间的距离。这样就能够使得通孔不会对电池片形成干涉。
图2示出了从电池片层2截取了部分的结构实例。该电池片层2包括了按照预定几何关系排列的多个电池片21,图2中的电池片21共有6*6个,每列的电池片21通过银栅线连接相邻电池片的正极和负极以形成串联,在电池组件的下方边缘在通过汇流条并联(图中未示出)以形成一路输出。在光伏组件背面将导线引出接到接线盒上。电池片层2的通孔2a就形成在电池片21所形成的间隙(例如每四个相邻电池片21之间的间隙)中,根据电池片的不同形式和不同布置方式,通孔2a也可以设置在两个或三个电池片之间的间隙中。
在本发明中,光伏组件采用双层玻璃面板对电池片层2进行封装,参考图1,可以看到双层玻璃面板包括位于所述电池片层2一侧的第一玻璃面板1和位于所述电池片层2另一侧的第二玻璃面板3,其中在第一玻璃面板1上设置的通孔1a和在第二玻璃面板3上设置的通孔3a能够与电池片层2的通孔2a相对应,以形成整体贯通的流体通道。第一玻璃面板1和第二玻璃面板3优选钢化玻璃,钢化玻璃能够确保 光伏组件的强度和防水性能,根据需要也可以选择其它类型的玻璃。另外相比于现有的不设通孔的双玻光伏组件,本发明通过在双层玻璃面板上设置通孔则进一步减轻了光伏组件的重量。
为了实现双层玻璃面板对电池片层的封装,在双层玻璃面板与电池片层2之间可以采用粘接层4来进行封装,通过粘接的方式将双层玻璃面板与电池片层结合起来,以组成光伏组件的整体。在另一实施例中,也可以双层玻璃面板也可通过其他形式对电池片层进行封装,例如在双层玻璃面板之间设置多个连接柱等。粘接层4除了起到了封装电池片层的作用,还能够将电池片层2的各个电池片21与多个通孔2a隔离。利用粘接材料将电池片21与通孔2a隔离,就能够避免电池片与通过通孔2a的流体接触,从而降低性能和使用寿命。在粘结层4上对应于双层玻璃面板和电池片层的通孔位置上也设有通孔4a,以便光伏组件形成整体贯通的流体通道。
粘接层4可采用EVA层,这种材料属于热固性的膜状热熔胶,当其加热到一定温度后,在层压机作用下发生物理和化学变化,将玻璃和电池片粘紧。EVA在热熔固化后,具有优越的粘连性能,兼顾结构稳固和防水功能。通过EVA所粘接的双层钢化玻璃和电池片层,可以获得良好的强度和防水性能。此外,也可以采用其他热固性的膜状热熔胶。在另一实施例中,还可以采用其他能够实现粘接的材料所形成的粘接层,例如热塑性的PVB(聚乙烯醇缩丁醛)层或者PDMS(聚二甲基硅氧烷)层。
如图3所示,为本发明光伏组件的另一实施例的结构示意图。与上一实施例相比,本实施例在电池片层2与第二玻璃面板3之间还设有聚氟乙烯薄膜5,例如Tedlar膜,这种聚氟乙烯薄膜5可通过粘接层4与电池片层粘接,并通过硅胶实现聚氟乙烯薄膜5和第二玻璃面板3的粘接。聚氟乙烯薄膜5具有良好的防水汽穿透性、高强度、耐高低温性和优良的电气性质,能够改善光伏组件的多方面性能。在聚氟乙烯薄膜5也设有通孔,以便形成整体贯通的流体通道。
在本发明中,进一步可以使双层玻璃面板的外边框直接构成光伏组件的外边框,而不采用外设铝合金制或其他金属材料制成的边框,由于玻璃为绝缘体,因此可以尽量减少或避免电子向边缘四周流失,有效抑制光伏组件PID(电势诱导衰减)效应,提高光伏组件发电效率。
最后应当说明的是:以上实施例仅用以说明本发明的技术方案而非对其限制;尽管参照较佳实施例对本发明进行了详细的说明,所属领域的普通技术人员应当理解:依然可以对本发明的具体实施方式进行修改或者对部分技术特征进行等同替换;而不脱离本发明技术方案的精神,其均应涵盖在本发明请求保护的技术方案范围当中。

Claims (8)

  1. 一种光伏组件,其特征在于,包括:双层玻璃面板和在双层玻璃面板之间封装的电池片层(2),在所述双层玻璃面板和所述电池片层(2)上均设有多个通孔,以形成在所述光伏组件上整体贯通的多个流体通道,至少部分所述通孔位于所述电池片层(2)中电池片(21)之间形成的间隙。
  2. 根据权利要求1所述的光伏组件,其特征在于,所述多个通孔形成多列通孔,且分布在多列电池片(21)中相邻列之间的间隙位置。
  3. 根据权利要求2所述的光伏组件,其特征在于,所述多个通孔在所述光伏组件所在平面上形成均匀排布的阵列。
  4. 根据权利要求2所述的光伏组件,其特征在于,所述通孔的孔径尺寸小于所述电池片层(2)中各个电池片(21)的间隙尺寸。
  5. 根据权利要求1所述的光伏组件,其特征在于,在所述双层玻璃面板与所述电池片层(2)之间设有用于在所述双层玻璃面板之间封装所述电池片层(2)的粘接层(4),所述粘接层(4)将所述电池片层(2)的各个电池片(21)与所述多个通孔隔离。
  6. 根据权利要求5所述的光伏组件,其特征在于,所述粘接层(4)为EVA层、PVB层或者PDMS层。
  7. 根据权利要求1所述的光伏组件,其特征在于,所述双层玻璃面板包括位于所述电池片层(2)一侧的第一玻璃面板(1)和位于所述电池片层(2)另一侧的第二玻璃面板(3),在所述电池片层(2)与所述第二玻璃面板(3)之间还设有聚氟乙烯薄膜(5)。
  8. 根据权利要求5所述的光伏组件,其特征在于,所述双层玻璃面板的外边框直接构成所述光伏组件的外边框。
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