CN102280512A - Having a high conversion efficiency of the solar cell module - Google Patents

Having a high conversion efficiency of the solar cell module Download PDF

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CN102280512A
CN102280512A CN2010101987686A CN201010198768A CN102280512A CN 102280512 A CN102280512 A CN 102280512A CN 2010101987686 A CN2010101987686 A CN 2010101987686A CN 201010198768 A CN201010198768 A CN 201010198768A CN 102280512 A CN102280512 A CN 102280512A
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layer
solar cell
cell module
eva
module according
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CN2010101987686A
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冯涛
宁兆伟
张健超
杨华
王建军
程文明
黄涛华
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南通美能得太阳能电力科技有限公司
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    • 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
    • Y02E10/52PV systems with concentrators

Abstract

本发明公布了一种具有高转换效率的太阳能电池组件,属于太阳能材料和器件技术领域。 The present invention discloses a solar cell module having high conversion efficiency, and belongs to the technical field of solar device materials. 一种具有高转换效率的太阳能电池组件,包括从上到下依次设置并封装为一体的超白低铁钢化玻璃、第一EVA层、串联在一起的太阳能电池片、第二EVA层、第三EVA层和背板,第二EVA层与第三EVA层之间装设有反射层,所述反射层的表面设有规则排列的V形沟槽。 Having a high conversion efficiency of the solar cell module, including sequentially disposed from top to bottom as one package and super white low iron tempered glass, a first layer of EVA, tandem solar cells together, the second layer EVA, the third EVA and the back sheet layer, a reflective layer is mounted between the second layer and the third EVA the EVA layer, the surface of the reflective layer is provided with V-shaped grooves regularly arranged. 这种V形沟槽使组件具有更高的反射率。 This V-shaped groove so that the assembly has a higher reflectance. 所述V形沟槽的内夹角为120度~138度。 The angle of said V-shaped groove is 120 degrees to 138 degrees. 这样可以保证V形沟槽两个面反射的光线到达玻璃表面时其入射角大于临界角发生全反射以被电池片吸收,而不会折射到空气中损失掉。 This ensures that when the light reflecting surface two V-shaped groove reaching the surface of the glass in than the critical angle is totally reflected solar cells is absorbed, refracted and not lost into the air.

Description

一种具有高转换效率的太阳能电池组件 Having a high conversion efficiency of the solar cell module

技术领域 FIELD

[0001] 本发明涉及太阳能电池组件,尤其涉及一种具有较高转换效率的太阳能电池组件。 [0001] The present invention relates to a solar cell module, particularly to a solar cell module having high conversion efficiency. 属于太阳能材料和器件技术领域。 Materials and Solar belonging TECHNICAL FIELD.

背景技术 Background technique

[0002] 太阳能作为一种清洁的可再生新能源受到了越来越多的关注,其应用也越来越广泛,目前太阳能一个最重要的应用就是光伏发电。 [0002] Solar energy as a clean and renewable new energy sources has attracted more and more attention, its application has become increasingly widespread, is currently one of the most important applications of solar photovoltaic power generation is. 太阳能光伏发电的最基本单元是太阳能电池,在具体的应用中,通常是将多个太阳能电池片构成太阳能电池组件,然后再将各个太阳能电池组件连接起来构成整体的电流输出。 Basic unit of solar photovoltaic solar cells is, in a particular application, typically a plurality of solar cells constituting the solar cell module, and then integrally connected together to form a current output of each solar cell module.

[0003] 目前广泛使用的太阳能电池组件基本上都是由超白低铁钢化玻璃、两层EVA层(乙烯-醋酸乙烯共聚物)、设置在两层EVA层中的太阳能电池和背板组成,这些元件在真空下加热层压成为一个整体,然后安装铝合金边框和接线盒,成为太阳能电池组件。 [0003] The solar cell module are now widely used essentially of ultra-clear low iron tempered glass, two-layer EVA (ethylene - vinyl acetate copolymer), and a solar cell back sheet is provided in two layers consisting of EVA, these elements are heated under a vacuum laminator as a whole, and then install the aluminum alloy frame and the junction box to become a solar cell module. 当太阳能组件工作时,透过超白低铁钢化玻璃的太阳光被太阳能电池吸收产生光电流,当组件和负载连接时,就会形成功率输出。 When working solar module, through ultra-low iron tempered glass white sunlight absorbed by the solar cell photocurrent, and when the load component is connected, the power output will form. 为了尽可能的提高太阳能电池组件的输出,即提高组件的转换效率,在目前的工艺中采取了很多方法以达到此效果。 In order to increase output of the solar cell module as much as possible, i.e., improve the conversion efficiency of the assembly, in the present process to take a lot of ways to achieve this effect. 如组件使用的电池片就是具有织构的表面,并镀有减反膜以减少电池对太阳光的反射;另外组件的最上层使用了镀有减反膜的钢化玻璃以增加光的透过率;此外组件使用的背板采用了白色光亮的表面,当太阳光照射到电池片间隙的背板上时,其白色的表面在一定程度上也可以增加对光的反射,然后再通过表层玻璃的反射使这部分光被太阳能电池吸收。 The battery plate assembly is used having a textured surface, and coated with anti-reflection film to reduce reflection of sunlight battery; transmittance Further components used uppermost anti-reflection film is coated with glass to increase the light ; furthermore backplate assembly for use with a white shiny surface, when the light shines on the back plate solar cell sheet gap, white surface thereof to some extent, reflected light can be increased, and then the glass surface by this reflected portion of the light is absorbed so that the solar cell. 以上几种方式对提高太阳能电池组件的转换效率都具有一定的作用,但对于第三种方法,白色的背板表面虽能提高对光的反射,但反射的大部分光线重新被太阳能电池利用的很少,因为很多反射回的光线都是重新透过表层玻璃折射到了空气中。 More ways to improve the conversion efficiency of the solar cell module has a certain role, but the third method, although the surface of the white backsheet can improve the reflection of light, but most of the light reflected by the solar cell re-use rarely, because many rays are reflected back again through the surface layer of the glass refracted into the air. 以一个规格为1580mm*808mm的太阳能电池组件为例,若其使用的太阳能电池片尺寸为125mm*125mm,电池片数量为72片,则透过玻璃照射到背板上的光大概占整个组件受光面积的12%,如果这部分光能被太阳能电池很好的利用起来, 将能显著提高太阳能电池组件的转换效率,增加组件的输出功率。 To 1580mm * 808mm specifications for a solar cell module as an example, the solar cell chip size if it is used 125mm * 125mm, the number of solar cells 72, the light irradiated through the glass on the backplane assembly about the total light 12% of the area, if this part of the light of the solar cell can be well utilized, can significantly improve the conversion efficiency of the solar cell module, increase the output power of the assembly.

[0004] 太阳辐射光谱的波长范围在150纳米到4000纳米之间,包含紫外光、可见光和红外光,其中7%的太阳辐射能量分布在紫外光谱区,50%在可见光谱区,43%在红外光谱区。 [0004] The solar radiation spectrum in the wavelength range between 150 nm to 4000 nm, comprising the ultraviolet, visible and infrared light, of which 7% of the energy distribution of the solar radiation in the ultraviolet region of the spectrum, in the visible spectral region 50%, 43% infrared spectral region. 太阳能电池对不同波长光的响应是不一样的,图1给出了某种硅太阳能电池的光谱响应曲线,从图上可以看到,对于不同波长的太阳光,硅太阳电池有不同的灵敏度。 The solar cell response to different wavelengths of light are not the same, Figure 1 shows the spectral response curves of some silicon solar cell can be seen from the figure, has a different sensitivity to different wavelengths of sunlight, silicon solar cells. 能够产生光生伏特效应的太阳辐射波长范围一般在400纳米到1200纳米范围内,而其它波长的太阳光则不能使硅太阳电池产生光生电流。 Capable of generating a photovoltaic effect of solar radiation in the wavelength range of generally 400 nm to 1200 nm, while other wavelengths of sunlight silicon solar cell can not photo-generated current. 由此可见,太阳辐射能量中会有很大部分能量不能被太阳电池吸收而损失掉。 Thus, there will be a solar radiation energy in most of the energy can not be absorbed by the solar cell is lost.

[0005] 从上面的分析可以看到,照射到太阳能电池组件上的太阳光除了被太阳电池吸收外,还有部分是被背板发射回去,仅有小部分被太阳能电池再吸收。 [0005] It can be seen from the above analysis, the solar cell module is irradiated to the solar cell in addition to being absorbed sunlight, there are some back emission backplate is, only a small portion of the solar cell resorbed. 结合太阳能电池的光谱响应特性,如何让这部分光最大限度能为太阳电池二次利用,就成为了一个技术问题。 Binding spectral response characteristics of the solar cell, this light how to maximize the solar energy secondary use, becomes a technical problem. 发明内容 SUMMARY

[0006] 本发明所要解决的技术问题在于提供一种具有高转换效率的太阳能电池组件,能够充分吸收照射到电池片间隙的太阳光,从而使组件具有更高的转换效率及输出功率。 [0006] The present invention solves the technical problem is to provide a high conversion efficiency of the solar cell module, it is possible to sufficiently absorb the solar cell is irradiated sheet gap, so that the assembly has a higher conversion efficiency and output power.

[0007] 本发明所述的具有高转换效率的太阳能电池组件,包括从上到下依次设置并封装为一体的超白低铁钢化玻璃、第一EVA层、串联在一起的太阳能电池片,第二EVA层,第三EVA层和背板,第二EVA层与第三EVA层之间装设有反射层,所述反射层的表面设有规则排列的V形沟槽。 [0007] The solar cell module according to the present invention has high conversion efficiency, comprising sequentially disposed from top to bottom as one package and super white low iron tempered glass, a first layer of EVA, tandem solar cells together, a first a reflective layer is mounted between the two EVA layer, the EVA layer and a third backing plate, the second EVA EVA layer and the third layer, the surface of the reflective layer is provided with V-shaped grooves regularly arranged. 这种V形沟槽使组件具有更高的反射率。 This V-shaped groove so that the assembly has a higher reflectance.

[0008] 所述V形沟槽的内夹角为120度〜138度。 [0008] The inner angle of the V-shaped groove 120 ° ~138 °. 这样可以保证V形沟槽两个面反射的光线到达玻璃表面时其入射角大于临界角发生全反射以被电池片吸收,而不会折射到空气中损失掉。 This ensures that when the light reflecting surface two V-shaped groove reaching the surface of the glass in than the critical angle is totally reflected solar cells is absorbed, refracted and not lost into the air.

[0009] 所述反射层基体材料为是一种热塑性材料,可以是聚乙烯对苯二甲酸酯或聚乙烯。 [0009] The reflective layer is a matrix material is a thermoplastic material, polyethylene or polyethylene terephthalate. 所述反射层的厚度为100〜250微米。 The thickness of the reflective layer is 100~250 microns.

[0010] 所述反射层的表面涂覆有荧光粉涂层,这样可以提高反射率。 [0010] The reflective surface is coated with a phosphor coating layer, which can increase the reflectivity.

[0011] 所述荧光粉涂层的材料为t03:Eu3+或NaYF4Ib3+, Er3+或者是两者的混合物。 Eu3 + or +, Er3 +, or a mixture of both NaYF4Ib3: t03 [0011] The material for the phosphor coating. 其中^O3 : Eu3+3+材料在紫外光的激发下可以发射红光,NaYF4 : Yb3+,Er3+可以吸收红外光发射绿光,当太阳光照射到荧光涂层时,涂层中的荧光材料能吸收太阳光中的紫外光和红外光,同时发出可见光,即此反射层上的荧光材料将太阳光中不能被太阳能电池所吸收的紫外光和红外光转换为太阳电池对其具有较高灵敏度的可见光,V型沟槽能更有效地将这些转换后的可见光反射到电池片上的钢化玻璃表面,由于这部分光线的入射角大于临界角,发生全反射,最后被太阳能电池重新吸收利用,从而间接增加了光生电流,即增加组件的输出功率及转换效率。 Wherein ^ O3: Eu3 + 3 + materials under excitation of ultraviolet light may emit red, NaYF4: Yb3 +, Er3 + emits green light may absorb infrared light, when the sun light shines fluorescent coating, the coating of the fluorescent material can absorb sunlight ultraviolet and infrared light, and emit visible light, i.e., a fluorescent material layer on the reflected sunlight can not be absorbed by the solar ultraviolet and infrared light is converted into a solar cell having higher sensitivity thereof visible light, V-grooves can be more effectively reflects visible light converted to the tempered glass sheet on the battery, since this part of the rays than the critical angle, total reflection, a solar cell is finally re-absorption, thereby indirectly photogenerated current increases, i.e., increase the output power and the conversion efficiency of the module.

[0012] 所述背板由聚氟乙烯复合膜材料做成,具有耐老化、耐腐蚀、阻止水汽渗透的能力及良好的绝缘性能。 [0012] The back sheet made of polyvinyl fluoride film composite material, resistant to aging, corrosion resistance, and good ability to prevent penetration of water vapor insulation.

附图说明 BRIEF DESCRIPTION

[0013] 下面结合附图和具体实施方式对本发明作进一步的详细说明。 [0013] The present invention will be described in further detail in conjunction with accompanying drawings and specific embodiments.

[0014] 图1 :硅太阳能电池的光谱响应图。 [0014] FIG 1: the spectral response of the silicon solar cell of FIG.

[0015] 图2 :太阳能电池组件的剖面图。 [0015] FIG 2: a cross-sectional view of a solar cell module.

[0016] 图3 :太阳能电池组件的局部剖面放大图,从中可以看出反射层4的构造。 [0016] FIG 3: a partial cross-sectional enlarged view of the solar cell module can be seen from the reflective layer 4 is configured.

[0017] 图2中,1为超白低铁钢化玻璃,21为第一EVA层,22为第二EVA层,23为第三EVA 层,3为太阳能电池片,4为反射层,5为背板; In [0017] FIG 2, a white ultra low iron tempered glass 21 as a first EVA layer, the EVA layer 22 is a second, a third EVA layer 23, a solar cell sheet 3, a reflective layer 4, 5 is backplane;

[0018] 图3中,6为V型沟槽,7为荧光粉涂层。 In [0018] FIG. 3, V-shaped grooves 6, 7 of the phosphor coating.

具体实施方式: Detailed ways:

[0019] 如图2所示,本发明一种具有高转换效率的太阳能电池组件包括从上到下依次排列的超白低铁钢化玻璃1、第一EVA层21、用焊带串联在一起的太阳能电池片3,第二EVA层22,第三EVA层23和背板5,第二EVA层22与第三EVA层23之间装设有反射层4。 [0019] 2, the present invention having a high conversion efficiency of a solar cell module comprising sequentially arranged from top to bottom of a super white low iron tempered glass, a first EVA layer 21, connected together in series by welding strip the solar battery cell 3, a second EVA layer 22, third layer 23 and the back sheet 5 EVA, the EVA layer of the second reflecting layer 4 is mounted between the EVA layer 22 and the third 23. 其中钢化玻璃具有高透光率并起到保护太阳能电池片的作用,EVA材料具有密封和粘结的作用,而背板5为TPT (聚氟乙烯复合膜)材质,具有耐老化、耐腐蚀、阻止水汽渗透的能力及良好的绝缘性能。 Wherein the glass has a high light transmittance and serves to protect the solar cells, EVA material has the effect of sealing and bonding of the back plate 5 of the TPT (polyvinyl fluoride composite membrane) material, resistant to aging, corrosion resistance, stopping power and good insulation properties of water vapor permeability. 将各层材料按照顺序敷设好,将其放入真空层压机进行高温层压,使其中的三层EVA层固化,成为一个整体的层压件,对层压件作修边处理,最后用铝合金边框进行装框,即得到了具有较高转换效率的太阳能电池组件。 The layers of material laid good order, which was placed in a vacuum laminator for laminating high temperature, which makes the three EVA layer is cured, the laminate as a whole, to the laminate for trimming, and finally aluminum frame for framing, i.e., to obtain a solar cell module having high conversion efficiency.

[0020] 在本实施例中,所述的反射层4基体材料为聚乙烯对苯二甲酸酯(PET),厚度为200微米,如图3所示,反射层4的表面具有很多规则排列的V形沟槽6,所述V形沟槽6的内夹角为120度〜138度,作为优选,其内夹角为130度,另外在反射层的表面涂覆有荧光粉涂层7,涂层的材料可以是^O3 : Eu3+或NaYF4 : Yb3+, Er3+或者是两者的混合物。 , The surface of the reflective layer 4 has a number of regularly arranged [0020] In the present embodiment, the reflecting layer 4 base material is polyethylene terephthalate (PET), having a thickness of 200 m, FIG. 3 V-shaped groove 6, the angle of the V-shaped groove 6 is 120 degrees ~138 °, preferably, an inner angle of 130 degrees, and another phosphor coating 7 on the surface coated with a reflective layer, , the coating material may O3 ^: Eu3 + or NaYF4: Yb3 +, Er3 +, or a mixture of both. 其中^O3 : Eu3+ 荧光粉可以吸收254nm的紫外光并发出613nm的红光,NaYF4:%3+,Er3+荧光粉则吸收970nm 的红外光发出540nm的绿光,照射到电池片间隙的太阳光被反射层上的荧光材料转换为可见光,由于反射层表面具有高反射率,然后这部分可见光被反射到组件最上层的玻璃表面上,由于V形沟槽的夹角为130度,则入射到玻璃表面光线的入射角为50度。 Wherein ^ O3: Eu3 + phosphor can absorb 613nm ultraviolet light at 254nm and emits red light, NaYF4:% 3 +, Er3 + green phosphor absorbs the infrared light emitted 970nm 540nm is irradiated to the solar cell sheet is a gap a fluorescent material on the reflective layer is converted into visible light, since the surface of the reflective layer having a high reflectance, and then is reflected onto the uppermost surface of the glass assembly of this part of the visible light, since the angle of the V-shaped groove is 130 degrees, the incident glass surface an angle of incidence of 50 degrees. 钢化玻璃的折射率在1. 5左右,当光从玻璃(光密介质)进入到空气(光疏介质)中时,临界角为42 度。 Refractive index of glass is about 1.5, when light enters into the air (optically thinner medium) from the glass (optically dense medium), the critical angle is 42 degrees. 在此种情况下,光线的入射角大于临界角,因此发生全反射,这部分光重新被反射到电池片,并被电池片吸收,此效应间接地增强入射到太阳能电池片上的光强,从而增大光生电流,最终增加组件的转换效率和输出功率。 In this case, the light than the critical angle, is totally reflected therefore, this light is reflected back to the solar cells, and solar cells absorb, this effect indirectly enhances the intensity of light incident on the solar cells, thereby photocurrent increases, eventually increase the conversion efficiency and power output of the assembly.

[0021] 本发明不局限于上述实施方式中的V形沟槽,如反射层表面也可以呈波浪形或其他类似的形状,只要利用了本发明构思,即在电池片下方设置反射层,将照射到电池片间隙的太阳光反射并加以利用,均落在本发明的保护范围之内。 [0021] The present invention is not limited to the V-groove of the above-described embodiment, as the surface of the reflective layer may be wavy, or other similar shapes, as long as the use of the concept of the present invention, i.e., the reflective layer is disposed beneath the cells, the irradiated to the reflection of sunlight and solar cells make use of the gap, are within the scope of the present invention.

Claims (8)

1. 一种具有高转换效率的太阳能电池组件,包括从上到下依次设置并封装为一体的超白低铁钢化玻璃(1)、第一EVA层(21)、串联在一起的太阳能电池片(3)、第二EVA层(22)、 第三EVA层03)和背板(5),其特征在于:第二EVA层Q2)与第三EVA层Q3)之间装设有反射层⑷。 1. having a high conversion efficiency of the solar cell module, including sequentially disposed from top to bottom as one package and super white low iron tempered glass (1), the first EVA layer (21), together with solar cells connected in series (3), a second EVA layer (22), a third layer 03 EVA) and a backplate (5), characterized by: mounting a second reflective layer between the EVA layer ⑷ Q2) and the third layer EVA Q3) .
2.如权利要求1所述的太阳能电池组件,其特征在于:所述反射层的表面设有规则排列的V形沟槽(6)。 The solar cell module according to claim 1, wherein: the surface of the reflective layer is provided with a V-shaped groove (6) arranged regularly.
3.如权利要求2所述的太阳能电池组件,其特征在于:所述V形沟槽(6)的内夹角为120度〜138度。 The solar cell module according to claim 2, wherein: the angle of the V-shaped groove (6) is 120 ° ~138 °.
4.如权利要求1所述的太阳能电池组件,其特征在于:所述反射层(4)基体材料为聚乙烯对苯二甲酸酯或聚乙烯。 The solar cell module according to claim 1, wherein: said reflective layer (4) the base material is polyethylene terephthalate or polyethylene.
5.如权利要求1所述的太阳能电池组件,其特征在于:所述反射层(4)的厚度为100〜 250微米。 The solar cell module according to claim 1, wherein: a thickness of the reflective layer (4) is 100~ 250 microns.
6.如权利要求1至5任一权利要求所述的太阳能电池组件,其特征在于:所述反射层(4)的表面涂覆有荧光粉涂层(7)。 The solar cell module according to any one of claims 5 claim, wherein: the reflective surface coating layer (4) has a phosphor coating (7).
7.如权利要求6所述的太阳能电池组件,其特征在于:所述荧光粉涂层(7)的材料为Y2O3 : Eu3+ 或NaYF4 : Yb3+, Er3+。 The solar cell module according to claim 6, wherein: the material of the phosphor coating (7) are Y2O3: Eu3 + or NaYF4: Yb3 +, Er3 +.
8.如权利要求1所述的太阳能电池组件,其特征在于:所述背板由聚氟乙烯复合膜材料做成。 8. The solar cell module according to claim 1, wherein: said back sheet material by a polyethylene composite film made of fluorine.
CN2010101987686A 2010-06-11 2010-06-11 Having a high conversion efficiency of the solar cell module CN102280512A (en)

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