JP2011142118A - Photovoltaic power generation unit - Google Patents

Photovoltaic power generation unit Download PDF

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JP2011142118A
JP2011142118A JP2010000386A JP2010000386A JP2011142118A JP 2011142118 A JP2011142118 A JP 2011142118A JP 2010000386 A JP2010000386 A JP 2010000386A JP 2010000386 A JP2010000386 A JP 2010000386A JP 2011142118 A JP2011142118 A JP 2011142118A
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power generation
photovoltaic power
generation unit
condensing
solar power
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JP2010000386A
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Japanese (ja)
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Eiji Tanaka
映治 田中
Masahiro Kubo
雅裕 久保
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Panasonic Corp
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Panasonic Corp
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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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

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Abstract

<P>PROBLEM TO BE SOLVED: To enhance productivity of a photovoltaic power generation unit for condensing sunlight to a photovoltaic power generating element through a condensing element to generate electricity. <P>SOLUTION: The photovoltaic power generation unit including the photovoltaic power generating element 2 and condensing sunlight to the photovoltaic power generating element 2 through the condensing element 1, is structured to use a plano-convex lens as the condensing element 1 and to mount the photovoltaic power generating element 2 to the plane of the plano-convex lens. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、太陽光発電素子に集光素子を介して太陽光を集光させて起電する太陽光発電ユニットに関する。   The present invention relates to a photovoltaic power generation unit that generates electricity by concentrating sunlight on a photovoltaic power generation element via a condensing element.

一般にこの種の太陽光発電ユニットは、小型で発電効率の高い太陽光発電素子に対して太陽光を効率よく照射するため太陽光発電素子の受光面側に数百倍の倍率を有する集光素子を配置する構成が知られている。   In general, this type of solar power generation unit is a condensing element having a magnification of several hundred times on the light receiving surface side of the solar power generation element in order to efficiently irradiate sunlight with a small and high power generation efficiency. The structure which arrange | positions is known.

従来、このような太陽光発電ユニットにおいては、太陽光発電素子と集光素子をそれぞれ所定の実装位置に個別に取り付けていた。   Conventionally, in such a photovoltaic power generation unit, the photovoltaic power generation element and the light collecting element are individually attached to predetermined mounting positions.

なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献１が知られている。   As prior art document information related to the invention of this application, for example, Patent Document 1 is known.

特開２００６−６４２０３号公報JP 2006-64203 A

しかしながら、集光素子の倍率が大きいことから太陽光発電素子の受光面に対する集光素子の組み付けバラツキが太陽光発電素子の発電効率に大きく影響を及ぼしてしまうため、この組み付け作業が非常に精度を要することから生産性を向上させることが困難であった。   However, since the magnification of the condensing element is large, the assembling variation of the condensing element with respect to the light receiving surface of the photovoltaic power generation element greatly affects the power generation efficiency of the photovoltaic power generation element. Therefore, it has been difficult to improve productivity.

そこで、本発明はこのような課題を解決し、太陽光発電ユニットの生産性向上を目的とする。   Therefore, the present invention aims to solve such problems and improve the productivity of the photovoltaic power generation unit.

そして、この目的を達成するために本発明は、太陽光発電素子と、この太陽光発電素子に集光素子を介して太陽光を集光させ太陽光発電ユニットにおいて、集光素子として平凸レンズを用い、平凸レンズの平面に太陽光発電素子を取り付ける構造としたのである。   In order to achieve this object, the present invention provides a solar power generation element and concentrating sunlight on the solar power generation element via a condensing element. The solar power generation element is attached to the plane of the plano-convex lens.

これにより本発明は、太陽光発電ユニットの生産性を向上させることが出来るのである。   Thereby, this invention can improve the productivity of a photovoltaic power generation unit.

本発明の一実施形態の太陽光発電ユニットを示す模式図The schematic diagram which shows the solar energy power generation unit of one Embodiment of this invention. 同太陽光発電ユニットを形成する太陽光発電素子の受光面における光強度分布を示す図The figure which shows the light intensity distribution in the light-receiving surface of the photovoltaic power generation element which forms the photovoltaic power generation unit 他の太陽光発電ユニットを示す模式図Schematic diagram showing another solar power generation unit

以下、本発明の一実施形態について図を用いて説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図１は集光素子１を介して太陽光を太陽光発電素子２の受光面２ａに受光させ起電する太陽光発電ユニットを示したもので、発電効率が高く受光面積が小さい太陽光発電素子２を用いるため受光面２ａの前方に倍率が１００倍程度の集光素子１を配置している。より具体的には集光素子１の有効径Ｄが７ｍｍに対して受光面２ａの外接円径ｄが０．７ｍｍとしている。   FIG. 1 shows a photovoltaic power generation unit that generates light by receiving sunlight on a light receiving surface 2a of a photovoltaic power generation element 2 through a condensing element 1, and has a high power generation efficiency and a small light receiving area. 2 is used, the condensing element 1 having a magnification of about 100 is disposed in front of the light receiving surface 2a. More specifically, the circumscribed circle diameter d of the light receiving surface 2a is 0.7 mm with respect to the effective diameter D of the light collecting element 1 being 7 mm.

また、この太陽光発電ユニットに用いる集光素子１は、光源側が凸面１ａで集光側が平面１ｂである平凸レンズを採用するとともに、この集光素子１の平面１ｂに太陽光発電素子２を取り付けた構造とすることで太陽光発電ユニットの生産性を高めた構造としているのである。   Moreover, the condensing element 1 used for this solar power generation unit employs a plano-convex lens having a convex surface 1 a on the light source side and a flat surface 1 b on the light condensing side, and a solar power generation element 2 is attached to the flat surface 1 b of the condensing element 1. This structure increases the productivity of the photovoltaic power generation unit.

すなわち、太陽光発電素子２を集光素子１に直接取り付ける構造とすることで、集光素子１の平面１ｂが太陽光発電素子２の実装基準面となることから、光路中における太陽光発電素子２と集光素子１の位置精度が上述した従来の個別取り付け構造に比べ格段に向上でき、結果としてこれらの組立て作業が容易となり太陽光発電ユニットの生産性が高められるのである。   That is, since the solar power generation element 2 is directly attached to the light condensing element 1, the flat surface 1 b of the light condensing element 1 becomes the mounting reference surface of the solar power generation element 2. 2 and the condensing element 1 can be remarkably improved in position accuracy as compared with the above-described conventional individual mounting structure. As a result, the assembling work is facilitated and the productivity of the photovoltaic power generation unit is increased.

また、この集光素子１の焦点Ｐの位置を太陽光発電素子２の受光面２ａよりも外側に設定したことで、受光面２ａに集光される光束の径を受光面２ａの径ｄに一致させ太陽光発電ユニットの光電変換効率を高めることができる。   Further, by setting the position of the focal point P of the light condensing element 1 outside the light receiving surface 2a of the photovoltaic power generation element 2, the diameter of the light beam condensed on the light receiving surface 2a is set to the diameter d of the light receiving surface 2a. It is possible to increase the photoelectric conversion efficiency of the photovoltaic power generation unit.

なお、平凸レンズの凸面１ａを球面設計した場合、凸面１ａの開口数を大きくすると受光面２ａと焦点Ｐ‘との間隔が小さくなるため図２の破線３で示すようにその光強度分布が受光面２ａの中央部分に集中してしまう。また凸面１ａの開口数を小さくすると受光面２ａと焦点Ｐ“との間隔が大きくなるため図２の破線４で示すようにその光強度分布が受光面２ａの外周部分に集中してしまい、受光面２ａの全体において均一な光強度分布を得ることができず、結果的に太陽光発電素子２のもつ光電変換効率を十分に引き出すことが出来ない。   When the convex surface 1a of the plano-convex lens is designed as a spherical surface, if the numerical aperture of the convex surface 1a is increased, the distance between the light receiving surface 2a and the focal point P 'decreases, so that the light intensity distribution is received as shown by the broken line 3 in FIG. It will concentrate on the center part of the surface 2a. Further, if the numerical aperture of the convex surface 1a is reduced, the distance between the light receiving surface 2a and the focal point P "is increased, so that the light intensity distribution is concentrated on the outer peripheral portion of the light receiving surface 2a as shown by the broken line 4 in FIG. A uniform light intensity distribution cannot be obtained over the entire surface 2a, and as a result, the photoelectric conversion efficiency of the photovoltaic power generation element 2 cannot be sufficiently obtained.

そこで、この凸面１ａのレンズ設計を非球面設計とすることで、非球面を定義する非球面係数の調節により受光面２ａにおける光強度分布を調節でき、その結果、図２の実線５で示すような受光面２ａにおける光強度分布を均一なものとし太陽光発電素子２のもつ光電変換効率を十分に引き出すことが出来るものである。   Therefore, by making the lens design of the convex surface 1a an aspherical design, the light intensity distribution on the light receiving surface 2a can be adjusted by adjusting the aspherical coefficient defining the aspherical surface. As a result, as shown by the solid line 5 in FIG. The light intensity distribution on the light receiving surface 2a can be made uniform, and the photoelectric conversion efficiency of the photovoltaic power generation element 2 can be sufficiently extracted.

また、平凸レンズの凸面１ａを非球面形状とすることでより精度良く光強度分布を均一にすることができる。   Further, by making the convex surface 1a of the plano-convex lens an aspherical shape, the light intensity distribution can be made uniform with higher accuracy.

なお、このような太陽光発電ユニットは、１００ｍｍ×１００ｍｍの枠内に約２００個の太陽光発電素子２を整列させるというように複数の太陽光発電素子２を用いた集合体であり、このような集合体を作成する上で太陽光発電素子２と集光素子１を一体化したものを個別に作成し組み合わせる構造とすると非常に手間の掛かるものとなることから、複数の集光素子１を一体化したアレイ構造を採用することで太陽光発電素子２の実装が容易にでき、また集光素子１が平凸レンズ形状であることからアレイ構造とした場合にも光学硝材を用いた加熱プレス成形が可能なものである。   In addition, such a photovoltaic power generation unit is an assembly using a plurality of photovoltaic power generation elements 2 such that approximately 200 photovoltaic power generation elements 2 are aligned in a frame of 100 mm × 100 mm. When a structure in which the photovoltaic power generation element 2 and the light condensing element 1 are separately created and combined to create a simple assembly is very time-consuming, a plurality of light condensing elements 1 are arranged. By adopting an integrated array structure, the photovoltaic power generation element 2 can be easily mounted, and since the condensing element 1 has a plano-convex lens shape, even in the case of an array structure, heat press molding using an optical glass material is used. Is possible.

本発明は太陽光発電ユニットの生産性が高められるものであり、主として光電変換効率の高い高性能太陽光発電素子を用いる太陽光発電ユニットにおいて有用となる。   The present invention increases the productivity of a photovoltaic power generation unit, and is useful mainly in a photovoltaic power generation unit that uses a high-performance photovoltaic power generation element with high photoelectric conversion efficiency.

１ 集光素子
１ａ 凸面
１ｂ 平面
２ 太陽光発電素子
Ｐ’，Ｐ” 焦点 DESCRIPTION OF SYMBOLS 1 Light condensing element 1a Convex surface 1b Plane 2 Solar power generation element P ', P "Focus

Claims (4)

太陽光発電素子と、この太陽光発電素子に太陽光を集光させる集光素子を備え、前記集光素子は集光側端面が平面である平凸レンズであり、前記平面に前記太陽光発電素子を取り付けたことを特徴とする太陽光発電ユニット。 A solar power generation element and a condensing element that condenses sunlight to the solar power generation element, the condensing element is a plano-convex lens having a flat condensing side end surface, and the solar power generation element A solar power generation unit characterized by having attached. 集光素子の焦点位置を太陽光発電素子より外側としたことを特徴とする請求項１に記載の太陽光発電ユニット。 The photovoltaic power generation unit according to claim 1, wherein the focal position of the condensing element is outside the photovoltaic power generation element. 集光素子の凸面を非球面形状としたことを特徴とする請求項２に記載の太陽光発電ユニット。 The photovoltaic power generation unit according to claim 2, wherein the convex surface of the condensing element has an aspherical shape. 複数の集光素子を一体化した集光素子アレイ構造とし、前記各集光素子に対して太陽光発電素子を取り付けたことを特徴とする請求項１に記載の太陽光発電ユニット。 The solar power generation unit according to claim 1, wherein a condensing element array structure is formed by integrating a plurality of condensing elements, and a solar power generation element is attached to each condensing element.
JP2010000386A 2010-01-05 2010-01-05 Photovoltaic power generation unit Pending JP2011142118A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9306095B2 (en) 2011-12-14 2016-04-05 Panasonic Intellectual Property Management Co., Ltd. Solar cell and method for manufacturing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9306095B2 (en) 2011-12-14 2016-04-05 Panasonic Intellectual Property Management Co., Ltd. Solar cell and method for manufacturing same

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