JP2011009714A - Solar cell module and method of manufacturing solar cell module - Google Patents

Solar cell module and method of manufacturing solar cell module Download PDF

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JP2011009714A
JP2011009714A JP2010111304A JP2010111304A JP2011009714A JP 2011009714 A JP2011009714 A JP 2011009714A JP 2010111304 A JP2010111304 A JP 2010111304A JP 2010111304 A JP2010111304 A JP 2010111304A JP 2011009714 A JP2011009714 A JP 2011009714A
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side sealing
sealing member
solar cell
surface side
cell module
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Katsuhiko Yanagawa
克彦 柳川
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Fuji Electric Co Ltd
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Fuji Electric Systems Co Ltd
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    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • 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

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Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module capable of enhancing reliability of a fitting structure of a solar cell to a base for installation without reference to a material of a back-side sealing member of the solar cell and a material of the base for installation.SOLUTION: A top-side sealing member 200 and the back-side sealing member 220 hold the solar cell 100 therebetween. A buffer member 400 is provided on an external surface of the back-side sealing member 220, and fused to the back-side sealing member 220. The buffer member 400 is composed of the material to which an adhesive layer 420 is bonded more easily than the back-side sealing material 220. The top-side sealing member 200, the back-side sealing member 220, and buffer member 400 are sheet-like members.

Description

本発明は、太陽電池セルを封止部材で封止した太陽電池モジュール及び太陽電池モジュールの製造方法に関する。   The present invention relates to a solar cell module in which solar cells are sealed with a sealing member, and a method for manufacturing the solar cell module.

太陽電池発電装置は、クリーンなエネルギー源であるため、近年注目されている。太陽電池発電装置が設置される場所は、日当たりの良い屋外になる。このため、年間の寒暖による温度差が加わり、かつ、風雨に晒される。そして、このような環境において、１０年以上の製品寿命が要求される。   Solar cell power generation devices have attracted attention in recent years because they are clean energy sources. The place where the solar battery power generation device is installed is sunny outdoors. For this reason, a temperature difference due to the temperature of the year is added, and it is exposed to wind and rain. In such an environment, a product life of 10 years or longer is required.

図５の断面概略図に、太陽電池発電装置を構成する太陽電池モジュールの構成の一例を示す。この太陽電池モジュールは、屋根用鋼板６３０上に、裏面側封止部材６２０、太陽電池セル６００、表面側封止材６１０、及び表面保護材６１２をこの順に重ね、この積層体を、真空ラミネート装置を用いて熱融着することにより形成される。   An example of the configuration of the solar cell module constituting the solar cell power generator is shown in the schematic cross-sectional view of FIG. In this solar cell module, a back surface side sealing member 620, a solar battery cell 600, a front surface side sealing material 610, and a surface protection material 612 are stacked in this order on a roof steel plate 630. It is formed by heat fusion using.

また特許文献１には、太陽電池パネルを、両面テープを用いて金属屋根に固定することが開示されている。   Patent Document 1 discloses fixing a solar cell panel to a metal roof using a double-sided tape.

特開平６−８５３０６号公報JP-A-6-85306

太陽電池が普及するためには、金属以外の材料からなる設置用基板にも太陽電池モジュールを高い信頼性で取り付けられるようにする必要がある。しかし図５に示した方法では、熱融着を行うことができない材料で基材が形成されている場合には、太陽電池モジュールを基材に取り付けることはできなかった。   In order for a solar cell to spread, it is necessary to make it possible to attach the solar cell module with high reliability to an installation substrate made of a material other than metal. However, in the method shown in FIG. 5, when the base material is formed of a material that cannot be heat-sealed, the solar cell module cannot be attached to the base material.

また特許文献１に記載の構造では、両面テープの接着層と太陽電池パネルの接着信頼性、及び両面テープの接着層と設置用基板の接着信頼性それぞれを高くする必要がある。このため、太陽電池セルの裏面側封止部材の材料、及び基材の材料によっては、十分な接着信頼性を得られない場合があった。   In the structure described in Patent Document 1, it is necessary to increase the adhesive reliability between the adhesive layer of the double-sided tape and the solar cell panel and the adhesive reliability between the adhesive layer of the double-sided tape and the installation substrate. For this reason, depending on the material of the back surface side sealing member of a photovoltaic cell and the material of a base material, sufficient adhesion reliability may not be obtained.

本発明は上記事情に鑑みてなされたものであり、その目的とするところは、太陽電池セルの裏面側封止部材の材料及び設置用基材の材料によらずに、設置用基材に対する太陽電池セルの取付構造の信頼性を高くすることができる太陽電池モジュール及び太陽電池モジュールの製造方法を提供することにある。   This invention is made | formed in view of the said situation, The place made into the objective is the sun with respect to the base material for installation irrespective of the material of the back surface side sealing member of a photovoltaic cell, and the material of the base material for installation. An object of the present invention is to provide a solar cell module and a method for manufacturing the solar cell module that can increase the reliability of the battery cell mounting structure.

本発明によれば、太陽電池セルと、
前記太陽電池セルを挟んで保持する表面側封止部材及び裏面側封止部材と、
前記裏面側封止部材の外面に設けられ、前記裏面側封止部材に融着されたバッファ部材と、
を備え、
前記バッファ部材は、前記裏面側封止部材より接着剤が接着しやすい材料から形成されている太陽電池モジュールが提供される。 According to the present invention, solar cells,
A front surface side sealing member and a back surface side sealing member that hold the solar battery cell therebetween,
A buffer member provided on the outer surface of the back surface side sealing member, and fused to the back surface side sealing member;
With
The buffer member is provided with a solar cell module formed of a material to which an adhesive is more easily bonded than the back side sealing member.

本発明によれば、太陽電池セルを、表面側封止部材及び裏面側封止部材で保持すると共に、前記裏面側封止部材の外面に、バッファ部材を融着し、
前記バッファ部材は、前記裏面側封止部材より接着剤が接着しやすい材料から形成される太陽電池モジュールの製造方法が提供される。 According to the present invention, the solar battery cell is held by the front surface side sealing member and the back surface side sealing member, and the buffer member is fused to the outer surface of the back surface side sealing member,
The said buffer member provides the manufacturing method of the solar cell module formed from the material which an adhesive agent adhere | attaches more easily than the said back surface side sealing member.

本発明によれば、太陽電池セルの裏面側封止部材の材料及び設置用基材の材料によらずに、設置用基材に対する太陽電池セルの取付構造の信頼性を高くすることができる。   ADVANTAGE OF THE INVENTION According to this invention, the reliability of the attachment structure of the photovoltaic cell with respect to the base material for installation can be made high irrespective of the material of the back surface side sealing member of a photovoltaic cell, and the material of the base material for installation.

実施形態に係る太陽電池モジュールの分解斜視図である。It is a disassembled perspective view of the solar cell module which concerns on embodiment. （ａ）は図１に示した太陽電池モジュールの断面概略図であり、（ｂ）は図１に示した太陽電池モジュールの平面概略図である。(A) is the cross-sectional schematic of the solar cell module shown in FIG. 1, (b) is the plane schematic of the solar cell module shown in FIG. 図１及び図２に示した太陽電池モジュールの製造方法を示すフローチャートである。It is a flowchart which shows the manufacturing method of the solar cell module shown in FIG.1 and FIG.2. 各図は図１及び図２に示した太陽電池モジュールを設置用基材に取り付ける方法を示す断面図である。Each figure is sectional drawing which shows the method of attaching the solar cell module shown in FIG.1 and FIG.2 to the base material for installation. 太陽電池発電装置を構成する太陽電池モジュールの構成の一例を示す断面概略図である。It is the cross-sectional schematic which shows an example of a structure of the solar cell module which comprises a solar cell power generation device.

（実施形態）
以下、本発明の実施の形態について、図面を用いて説明する。尚、すべての図面において、同様な構成要素には同様の符号を付し、適宜説明を省略する。 (Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

図１は、実施形態に係る太陽電池モジュールの分解斜視図である。この太陽電池モジュールは、太陽電池セル１００、表面側封止部材２００、裏面側封止部材２２０、及びバッファ部材４００を備え、接着剤からなる接着層４２０を用いて屋根用鋼板などの設置用基材に取り付けられる。表面側封止部材２００及び裏面側封止部材２２０は、太陽電池セル１００を挟んで保持する。バッファ部材４００は裏面側封止部材２２０の外面に設けられており、裏面側封止部材２２０に融着されている。バッファ部材４００は、裏面側封止部材２２０より接着層４２０が接着しやすい材料から構成されている。表面側封止部材２００、裏面側封止部材２２０、及びバッファ部材４００はシート状の部材である。   FIG. 1 is an exploded perspective view of the solar cell module according to the embodiment. This solar battery module includes a solar battery cell 100, a front surface side sealing member 200, a back surface side sealing member 220, and a buffer member 400, and uses an adhesive layer 420 made of an adhesive to install a roof steel plate or the like. Attached to the material. The front surface side sealing member 200 and the back surface side sealing member 220 hold the solar battery cell 100 therebetween. The buffer member 400 is provided on the outer surface of the back side sealing member 220 and is fused to the back side sealing member 220. The buffer member 400 is made of a material that allows the adhesive layer 420 to adhere more easily than the back side sealing member 220. The front surface side sealing member 200, the back surface side sealing member 220, and the buffer member 400 are sheet-like members.

裏面側封止部材２２０は、例えばエチレンビニルアセテート（ＥＶＡ）により形成される。この場合、バッファ部材４００は、例えば、ポリエチレンテレフタラート（ＰＥＴ）などのポリエステル、又はポリエチレンナフタレート（ＰＥＮ）で形成される。また接着層４２０は、例えばアクリル系感圧接着剤で形成される。また表面側封止部材２００は、例えば裏面側封止部材２２０と同じ材料により形成されている。   The back side sealing member 220 is formed of, for example, ethylene vinyl acetate (EVA). In this case, the buffer member 400 is made of, for example, polyester such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN). The adhesive layer 420 is formed of, for example, an acrylic pressure sensitive adhesive. Moreover, the front surface side sealing member 200 is formed of the same material as the back surface side sealing member 220, for example.

太陽電池セル１００は、例えばＳＣＡＦ（Ｓｅｒｉｅｓ Ｃｏｎｎｅｃｔｉｏｎ ｔｈｒｏｕｇｈ Ａｐｅｒｔｕｒｅ ｏｎ Ｆｉｌｍ）型の薄膜太陽電池である。詳細には、太陽電池セル１００は、基板３１０、光電変換素子１１５、及び接続電極層３１４を備えている。太陽電池セル１００には、導電性の箔リードからなる引出配線１２４が取り付けられている。   The solar battery cell 100 is, for example, a SCAF (Series Connection through Aperture on Film) type thin film solar battery. Specifically, the solar battery cell 100 includes a substrate 310, a photoelectric conversion element 115, and a connection electrode layer 314. The solar cell 100 is provided with a lead wiring 124 made of a conductive foil lead.

基板３１０は、例えばポリイミド、ポリアミド、ポリイミドアミド、ポリエチレンナフタレート、ポリエチレンテレフタラート、ポリエーテルイミド（ＰＥＩ）、ポリエーテルエーテルケトン（ＰＥＥＫ）、又はポリエーテルスルホン（ＰＥＳ）などの絶縁性の基板である。   The substrate 310 is an insulating substrate such as polyimide, polyamide, polyimide amide, polyethylene naphthalate, polyethylene terephthalate, polyetherimide (PEI), polyetheretherketone (PEEK), or polyethersulfone (PES). .

光電変換素子１１５は、基板３１０の一面に、下電極層１１１、光電変換層１１２、及び透明電極層１１３をこの順に積層した構成である。光電変換層１１２は、例えば微結晶シリコン層やアモルファスシリコン層により形成されている。また、基板３１０上の反対面（裏面）には、接続電極層３１４が形成されている。そして、複数に分割されている光電変換素子１１５と接続電極層３１４を、基板３１０の各面で並べて配置している。   The photoelectric conversion element 115 has a configuration in which a lower electrode layer 111, a photoelectric conversion layer 112, and a transparent electrode layer 113 are stacked in this order on one surface of a substrate 310. The photoelectric conversion layer 112 is formed of, for example, a microcrystalline silicon layer or an amorphous silicon layer. A connection electrode layer 314 is formed on the opposite surface (back surface) on the substrate 310. Then, the photoelectric conversion element 115 and the connection electrode layer 314 that are divided into a plurality are arranged side by side on each surface of the substrate 310.

光電変換素子１１５は、基板３１０の一面において複数に分割されたブロックとして配置されており、接続電極層３１４は、基板３１０の反対面において複数に分割されたブロックとして配置されている。平面視において、光電変換素子１１５のブロックと接続電極層３１４のブロックは互いに位置がずれており、一方のブロックの隙間に他方が重なるように配置されている。   The photoelectric conversion element 115 is arranged as a plurality of divided blocks on one surface of the substrate 310, and the connection electrode layer 314 is arranged as a plurality of divided blocks on the opposite surface of the substrate 310. In plan view, the block of the photoelectric conversion element 115 and the block of the connection electrode layer 314 are displaced from each other, and are arranged so that the other overlaps the gap between the blocks.

太陽電池セル１００には、集電孔３１２である貫通穴が複数配置されており、透明電極層１１３と接続電極層３１４が、この集電孔３１２の内壁に設けてある導電性膜により電気的に接続している。   The solar battery cell 100 is provided with a plurality of through holes, which are current collecting holes 312, and the transparent electrode layer 113 and the connection electrode layer 314 are electrically connected by a conductive film provided on the inner wall of the current collecting hole 312. Connected to.

また、透明電極層１１３を部分的に成膜していない箇所には、接続孔３１６が設けられており、下電極層１１１と接続電極層３１４とを、この接続孔３１６の内壁に設けてある導電性膜により電気的に接続している。   Further, a connection hole 316 is provided at a location where the transparent electrode layer 113 is not partially formed, and the lower electrode layer 111 and the connection electrode layer 314 are provided on the inner wall of the connection hole 316. They are electrically connected by a conductive film.

そして、集電孔３１２と接続孔３１６とは、分割された接続電極層３１４に対して、隣り合う別の接続電極層３１４に接続するように形成されている。具体的には、接続孔３１６が接続する接続電極層３１４に対しては、隣の光電変換素子１１５の集電孔３１２が接続するようにしている。このため、光電変換素子１１５は、隣り合うブロック同士が直列接続する。   The current collecting hole 312 and the connection hole 316 are formed so as to be connected to another connection electrode layer 314 adjacent to the divided connection electrode layer 314. Specifically, the current collection hole 312 of the adjacent photoelectric conversion element 115 is connected to the connection electrode layer 314 to which the connection hole 316 is connected. For this reason, in the photoelectric conversion element 115, adjacent blocks are connected in series.

引出配線１２４は、例えば銅箔リード線であり、基板３１０のうち接続電極層３１４が形成されている面(図１においては下面)から基板３１０の外部に引き出されており、太陽電池セル１１０の出力を外部に伝達する。詳細には、２本の引出配線１２４は、基板３１０の両端に位置する接続電極層３１４のブロックに接続している。   The lead-out wiring 124 is, for example, a copper foil lead wire, and is led out of the substrate 310 from the surface of the substrate 310 where the connection electrode layer 314 is formed (the lower surface in FIG. 1). Transmit the output to the outside. Specifically, the two lead wires 124 are connected to blocks of connection electrode layers 314 located at both ends of the substrate 310.

また引出配線１２４のうち基板３１０の外部に引き出されている部分は、裏面側封止部材２２０、バッファ部材４００、及び接着層４２０に設けられた貫通孔（図示せず）を介して、外部に引き出されている。   A portion of the lead-out wiring 124 that is led out of the substrate 310 is exposed to the outside through a through hole (not shown) provided in the back surface side sealing member 220, the buffer member 400, and the adhesive layer 420. Has been pulled out.

ただし、太陽電池セル１００が有する光電変換素子１１５は、上記した構造である必要はなく、他の構造の太陽電池であっても良い。   However, the photoelectric conversion element 115 included in the solar battery cell 100 does not have to have the above-described structure, and may be a solar battery having another structure.

図２（ａ）は、図１に示した太陽電池モジュールの断面概略図であり、図２（ｂ）は図１に示した太陽電池モジュールの平面概略図である。図２（ａ）は図２（ｂ）のＡ−Ａ´断面を示している。本図に示す例において、表面側封止部材２００の外面側（図２（ａ）に示す例では上側）には、さらに表面保護材２０２が設けられている。表面保護材２０２は、例えばＥＴＦＥにより形成されている。   2A is a schematic cross-sectional view of the solar cell module shown in FIG. 1, and FIG. 2B is a schematic plan view of the solar cell module shown in FIG. FIG. 2A shows an AA ′ cross section of FIG. In the example shown in this drawing, a surface protective material 202 is further provided on the outer surface side of the surface side sealing member 200 (upper side in the example shown in FIG. 2A). The surface protective material 202 is made of ETFE, for example.

表面保護材２０２、表面側封止部材２００、裏面側封止部材２２０、及びバッファ部材４００の平面形状は、互いに同一であり、かつ、太陽電池セル１００より大きい。そしてこれらは、平面視において太陽電池セル１００より外側にも設けられている。図２（ｂ）に示すように、本実施形態では、太陽電池セル１００の平面形状が略長方形又は正方形である。そして表面保護材２０２、表面側封止部材２００、裏面側封止部材２２０、及びバッファ部材４００は、太陽電池セル１００の４辺それぞれにおいて、太陽電池セル１００より外側にも設けられている。太陽電池セル１００より外側に設けられている部分は、折曲加工代５０として用いられる。   The planar shapes of the surface protective material 202, the front surface side sealing member 200, the back surface side sealing member 220, and the buffer member 400 are the same as each other and larger than the solar battery cell 100. These are also provided outside the solar battery cell 100 in plan view. As shown in FIG.2 (b), in this embodiment, the planar shape of the photovoltaic cell 100 is a substantially rectangular shape or a square. And the surface protection material 202, the surface side sealing member 200, the back surface side sealing member 220, and the buffer member 400 are provided also outside the photovoltaic cell 100 in each of the four sides of the photovoltaic cell 100. A portion provided outside the solar battery cell 100 is used as a bending allowance 50.

図３は、図１及び図２に示した太陽電池モジュールの製造方法を示すフローチャートである。まず、バッファ部材４００、裏面側封止部材２２０、太陽電池セル１００、表面側封止部材２００、及び表面保護材２０２をこの順に積層する（ステップＳ１０）。このとき、引出配線１２４のうち基板３１０の外部に引き出されている部分を、裏面側封止部材２２０及びバッファ部材４００に設けられた貫通孔（図示せず）を介して、バッファ部材４００の下面側から外部に引き出す。   FIG. 3 is a flowchart showing a method for manufacturing the solar cell module shown in FIGS. 1 and 2. First, the buffer member 400, the back surface side sealing member 220, the solar battery cell 100, the front surface side sealing member 200, and the surface protection material 202 are laminated in this order (step S10). At this time, the portion of the lead-out wiring 124 that is led out of the substrate 310 is connected to the lower surface of the buffer member 400 through a back surface side sealing member 220 and a through hole (not shown) provided in the buffer member 400. Pull out from the side.

次いで、この積層体を真空加熱ラミネート装置に載置し、所定時間減圧した後、所定時間加熱する。これにより、太陽電池セル１００は、表面側封止部材２００及び裏面側封止部材２２０によりラミネート封止され、これらによって挟まれる。またバッファ部材４００は裏面側封止部材２２０に熱融着され、かつ表面保護材２０２は表面側封止部材２００に熱融着される（ステップＳ２０）。   Next, the laminate is placed on a vacuum heating laminator, depressurized for a predetermined time, and then heated for a predetermined time. Thereby, the photovoltaic cell 100 is laminated and sealed by the front surface side sealing member 200 and the back surface side sealing member 220, and is sandwiched between them. The buffer member 400 is heat-sealed to the back surface side sealing member 220, and the surface protective material 202 is heat-sealed to the front surface side sealing member 200 (step S20).

図４の各図は、図１及び図２に示した太陽電池モジュールを設置用基材５００に取り付ける方法を示す断面図である。設置用基材５００は、塗装された鋼、チタン、及びプラスチックからなる群から選ばれた少なくとも一つにより形成される。塗装された鋼としては、例えばガルバリウム鋼板をポリエステル又はフッ素で塗装したものを用いることができる。   4 is a cross-sectional view showing a method for attaching the solar cell module shown in FIGS. 1 and 2 to the installation base material 500. FIG. The installation base 500 is formed of at least one selected from the group consisting of painted steel, titanium, and plastic. As the coated steel, for example, a galvalume steel plate coated with polyester or fluorine can be used.

まず図４（ａ）に示すように、設置用基材５００の太陽電池モジュールの取付面に、接着層４２０を設ける。接着層４２０は、例えばシート状の接着剤であり、設置用基材５００に貼りあわされる。   First, as shown to Fig.4 (a), the contact bonding layer 420 is provided in the attachment surface of the solar cell module of the base material 500 for installation. The adhesive layer 420 is, for example, a sheet-like adhesive, and is attached to the installation base material 500.

次いで図４（ｂ）に示すように、太陽電池モジュールを接着層４２０に押し付ける。このとき、図１に示した引出配線１２４を、設置用基材５００及び接着層４２０に設けられた貫通孔を介して、設置用基材５００の取り付け面とは反対側の面に引き出す。これにより、太陽電池モジュールは、接着層４２０を介して設置用基材５００に取り付けられる。接着層４２０が感圧型の接着剤である場合、太陽電池モジュールを接着層４２０に加圧加重を加えることにより接着層４２０が硬化し、太陽電池モジュールの設置用基材５００への取り付けが完了する。   Next, as shown in FIG. 4B, the solar cell module is pressed against the adhesive layer 420. At this time, the lead-out wiring 124 shown in FIG. 1 is drawn out to the surface opposite to the mounting surface of the installation base material 500 through the through holes provided in the installation base material 500 and the adhesive layer 420. Accordingly, the solar cell module is attached to the installation base 500 via the adhesive layer 420. When the adhesive layer 420 is a pressure-sensitive adhesive, the adhesive layer 420 is cured by applying a pressure load to the adhesive layer 420 and the attachment of the solar cell module to the installation base 500 is completed. .

設置用基材５００の平面形状は太陽電池セル１００より大きく、例えば裏面側封止部材２２０と同様の形状である。このため、図４（ｂ）に示す状態において、設置用基材５００にも折曲加工代５０が設けられる。折曲加工代５０には折り曲げ加工が施され、断面形状が例えばハット形状になる。これにより、設置用基材５００を含めた太陽電池モジュールの剛性が向上する。   The planar shape of the base material 500 for installation is larger than that of the solar battery cell 100, and for example, is the same shape as the back surface side sealing member 220. For this reason, in the state shown in FIG. 4B, the bending allowance 50 is also provided on the installation base material 500. The bending allowance 50 is subjected to a bending process, and the cross-sectional shape becomes, for example, a hat shape. Thereby, the rigidity of the solar cell module including the installation base material 500 is improved.

次に、本実施形態の作用及び効果について説明する。本実施形態によれば、裏面側封止部材２２０の外面にバッファ部材４００を融着している。バッファ部材４００は、裏面側封止部材２２０より接着層４２０の接着性が良い材料から形成されている。裏面側封止部材２２０とバッファ部材４００は融着しているため、強固に接合している。バッファ部材４００と接着層４２０の接合強度、及び裏面側封止部材２２０とバッファ部材４００の強度は、いずれも、裏面側封止部材２２０に直接接着層４２０を設けた場合における裏面側封止部材２２０と接着層４２０の接合強度よりも高い。このため、太陽電池セル１００、表面側封止部材２００、及び裏面側封止部材２２０の積層体と、設置用基材５００の接合が強固になる。従って、バッファ部材４００の材料を適宜選択することにより、裏面側封止部材２２０の材料及び設置用基材５００の材料によらずに、設置用基材５００に対する太陽電池セル１００の取付構造の信頼性を高くすることができる。   Next, the operation and effect of this embodiment will be described. According to this embodiment, the buffer member 400 is fused to the outer surface of the back surface side sealing member 220. The buffer member 400 is formed of a material having better adhesion of the adhesive layer 420 than the back side sealing member 220. Since the back surface side sealing member 220 and the buffer member 400 are fused, they are firmly bonded. The bonding strength between the buffer member 400 and the adhesive layer 420 and the strength of the back surface side sealing member 220 and the buffer member 400 are both the back surface side sealing member when the adhesive layer 420 is provided directly on the back surface side sealing member 220. The bonding strength between 220 and the adhesive layer 420 is higher. For this reason, joining of the laminated body of the photovoltaic cell 100, the surface side sealing member 200, and the back surface side sealing member 220, and the base material 500 for installation becomes strong. Therefore, by appropriately selecting the material of the buffer member 400, the reliability of the mounting structure of the solar battery cell 100 with respect to the installation base material 500 regardless of the material of the back surface side sealing member 220 and the material of the installation base material 500. Sexuality can be increased.

またバッファ部材４００としてポリエチレンテレフタラートなどの絶縁材料を用いた場合、太陽電池モジュールの裏面側の絶縁性が向上するため、太陽電池モジュールの絶縁信頼性及び耐久性も向上する。   Further, when an insulating material such as polyethylene terephthalate is used as the buffer member 400, the insulation on the back side of the solar cell module is improved, so that the insulation reliability and durability of the solar cell module are also improved.

また、接着層４２０として感圧型の接着剤を用いることができるため、太陽電池セル１００と容易に設置用基材５００に取り付けることができる。   Further, since a pressure-sensitive adhesive can be used as the adhesive layer 420, the adhesive layer 420 can be easily attached to the installation base material 500.

また、太陽電池セル１００を表面側封止部材２００及び裏面側封止部材２２０でラミネート封止するときに、バッファ部材４００を裏面側封止部材２２０に熱融着させている。このため、太陽電池モジュールの製造工程数が増加することを抑制できる。   Further, when the solar battery cell 100 is laminated and sealed with the front surface side sealing member 200 and the back surface side sealing member 220, the buffer member 400 is thermally fused to the back surface side sealing member 220. For this reason, it can suppress that the manufacturing process number of a solar cell module increases.

以上、図面を参照して本発明の実施形態について述べたが、これらは本発明の例示であり、上記以外の様々な構成を採用することもできる。例えば折曲加工代５０は、太陽電池モジュールの長辺のみ又は短辺のみに形成されていても良い。   As mentioned above, although embodiment of this invention was described with reference to drawings, these are the illustrations of this invention, Various structures other than the above are also employable. For example, the bending processing allowance 50 may be formed only on the long side or only the short side of the solar cell module.

（実施例１）
太陽電池セル１００として、アモルファスシリコン太陽電池セルを使用した。表面側封止部材２００及び裏面側封止部材２２０としてエチレンビニルアセテートシートを用いた。バッファ部材４００としてポリエチレンテレフタラート（ＰＥＴ）フィルムを用いた。接着層４２０としてはアクリル系感圧型シート状接着剤を用いた。設置用基材５００としては、チタン鋼板を使用した。また表面保護材２０２としては、ＥＴＦＥを用いた。 Example 1
As the solar battery cell 100, an amorphous silicon solar battery cell was used. An ethylene vinyl acetate sheet was used as the front surface side sealing member 200 and the back surface side sealing member 220. A polyethylene terephthalate (PET) film was used as the buffer member 400. As the adhesive layer 420, an acrylic pressure sensitive sheet adhesive was used. As the base material 500 for installation, a titanium steel plate was used. As the surface protective material 202, ETFE was used.

そして、真空ラミネート装置では、バッファ部材４００、裏面側封止部材２２０、太陽電池セル１００、表面側封止部材２００、及び表面保護材２０２の積層体を、真空度を１Ｔｏｒｒとして３０分間減圧した後、１５０℃で３０分間熱処理した。   And in a vacuum laminating apparatus, after depressurizing the laminated body of the buffer member 400, the back surface side sealing member 220, the photovoltaic cell 100, the surface side sealing member 200, and the surface protection material 202 for 30 minutes by setting the degree of vacuum to 1 Torr. And heat treatment at 150 ° C. for 30 minutes.

この太陽電池モジュールは、太陽電池セル１００、表面側封止部材２００、及び裏面側封止部材２２０の積層体と、設置用基材５００の接合が強固であった。また、屋外に設置された架台や建物の屋根に設置しても、接合強度が低下せず、良好な耐久性を示した。   In this solar cell module, the laminate of the solar battery cell 100, the front surface side sealing member 200, and the back surface side sealing member 220 and the installation base material 500 were firmly bonded. In addition, even when installed on a stand or a roof of a building installed outdoors, the bonding strength did not decrease and showed good durability.

（実施例２）
バッファ部材４００としてＰＥＮフィルムを使用した点を除いて、実施例１と同様の構造の太陽電池モジュールを、実施例１と同様の方法により製造した。この実施例においても、実施例１と同様の効果が得られた。 (Example 2)
Except for using a PEN film as the buffer member 400, a solar cell module having the same structure as in Example 1 was manufactured in the same manner as in Example 1. Also in this example, the same effect as in Example 1 was obtained.

５０ 折曲加工代
１００ 太陽電池セル
１１１ 下電極層
１１２ 光電変換層
１１３ 透明電極層
１１５ 光電変換素子
１２４ 引出配線
２００ 表面側封止部材
２０２ 表面保護材
２２０ 裏面側封止部材
３１０ 基板
３１２ 集電孔
３１４ 接続電極層
３１６ 接続孔
４００ バッファ部材
４２０ 接着層
５００ 設置用基材
６００ 太陽電池セル
６１０ 表面側封止材
６１２ 表面保護材
６２０ 裏面側封止部材
６３０ 屋根用鋼板 50 Bending processing cost 100 Solar cell 111 Lower electrode layer 112 Photoelectric conversion layer 113 Transparent electrode layer 115 Photoelectric conversion element 124 Lead wire 200 Front surface side sealing member 202 Surface protective material 220 Back surface side sealing member 310 Substrate 312 Current collecting hole 314 Connection electrode layer 316 Connection hole 400 Buffer member 420 Adhesive layer 500 Installation base material 600 Solar cell 610 Surface side sealing material 612 Surface protection material 620 Back surface side sealing member 630 Steel plate for roof

Claims (8)

太陽電池セルと、
前記太陽電池セルを挟んで保持する表面側封止部材及び裏面側封止部材と、
前記裏面側封止部材の外面に設けられ、前記裏面側封止部材に融着されたバッファ部材と、
を備え、
前記バッファ部材は、前記裏面側封止部材より接着剤が接着しやすい材料から形成されている太陽電池モジュール。 Solar cells,
A front surface side sealing member and a back surface side sealing member that hold the solar battery cell therebetween,
A buffer member provided on the outer surface of the back surface side sealing member, and fused to the back surface side sealing member;
With
The said buffer member is a solar cell module currently formed from the material which an adhesive agent adheres more easily than the said back surface side sealing member. 請求項１に記載の太陽電池モジュールにおいて、
前記裏面側封止部材は、エチレンビニルアセテートで形成されており、
前記バッファ部材は、ポリエチレンテレフタラート又はポリエチレンナフタレートで形成されている太陽電池モジュール。 The solar cell module according to claim 1, wherein
The back side sealing member is made of ethylene vinyl acetate,
The buffer member is a solar cell module formed of polyethylene terephthalate or polyethylene naphthalate. 請求項１又は２に記載の太陽電池モジュールにおいて、
前記接着剤は、感圧型のアクリル系接着剤である太陽電池モジュール。 In the solar cell module according to claim 1 or 2,
The adhesive is a solar cell module which is a pressure-sensitive acrylic adhesive. 請求項１〜３のいずれか一つに記載の太陽電池モジュールにおいて、
前記表面側封止部材、前記裏面側封止部材及び前記バッファ部材は、前記太陽電池セルより平面形状が大きく、平面視において前記太陽電池セルより外側にも設けられている太陽電池モジュール。 In the solar cell module according to any one of claims 1 to 3,
The front surface side sealing member, the back surface side sealing member, and the buffer member have a larger planar shape than the solar cell, and are also provided outside the solar cell in plan view. 請求項１〜４のいずれか一つに記載の太陽電池モジュールにおいて、
前記接着剤によって前記太陽電池セル、前記表面側封止部材、前記裏面側封止部材、及び前記バッファ部材が取り付けられた設置用基材を備え、
前記設置用基材は、塗装された鋼、チタン、及びプラスチックからなる群から選ばれた少なくとも一つにより形成される太陽電池モジュール。 In the solar cell module according to any one of claims 1 to 4,
The solar cell, the front surface side sealing member, the back surface side sealing member, and the base material for installation to which the buffer member is attached by the adhesive,
The installation base material is a solar cell module formed of at least one selected from the group consisting of painted steel, titanium, and plastic. 太陽電池セルを、表面側封止部材及び裏面側封止部材で保持すると共に、前記裏面側封止部材の外面に、バッファ部材を融着し、
前記バッファ部材は、前記裏面側封止部材より接着剤が接着しやすい材料から形成される太陽電池モジュールの製造方法。 While holding the solar cell with the front surface side sealing member and the back surface side sealing member, the buffer member is fused to the outer surface of the back surface side sealing member,
The said buffer member is a manufacturing method of the solar cell module formed from the material which an adhesive agent adheres more easily than the said back surface side sealing member. 請求項６に記載の太陽電池モジュールの製造方法において、
前記バッファ部材、前記裏面側封止部材、前記太陽電池セル、及び前記表面側封止部材をこの順に積層して積層体を形成し、
前記積層体を真空ラミネート処理することにより、前記表面側封止部材及び前記裏面側封止部材で前記太陽電池セルを保持すると共に、前記裏面側封止部材の外面に前記バッファ部材を融着する太陽電池モジュールの製造方法。 In the manufacturing method of the solar cell module according to claim 6,
The buffer member, the back surface side sealing member, the solar battery cell, and the front surface side sealing member are laminated in this order to form a laminate.
By vacuum-laminating the laminate, the solar cell is held by the front surface side sealing member and the back surface side sealing member, and the buffer member is fused to the outer surface of the back surface side sealing member. Manufacturing method of solar cell module. 請求項７に記載の太陽電池モジュールの製造方法において、
前記接着剤を前記バッファ部材に塗布して接着層を形成し、前記接着層を用いて、前記太陽電池セル、前記表面側封止部材、前記裏面側封止部材、及びバッファ部材を設置用基材に取り付ける太陽電池モジュールの製造方法。 In the manufacturing method of the solar cell module according to claim 7,
The adhesive is applied to the buffer member to form an adhesive layer, and the solar cell, the front surface side sealing member, the back surface side sealing member, and the buffer member are installed on the installation base using the adhesive layer. A method for manufacturing a solar cell module to be attached to a material.
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JP2008053419A (en) * 2006-08-24 2008-03-06 Fuji Electric Holdings Co Ltd Sealing structure and method of manufacturing solar cell module

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