JP2015023255A - Joint box for photovoltaic power generation - Google Patents

Joint box for photovoltaic power generation Download PDF

Info

Publication number
JP2015023255A
JP2015023255A JP2013152982A JP2013152982A JP2015023255A JP 2015023255 A JP2015023255 A JP 2015023255A JP 2013152982 A JP2013152982 A JP 2013152982A JP 2013152982 A JP2013152982 A JP 2013152982A JP 2015023255 A JP2015023255 A JP 2015023255A
Authority
JP
Japan
Prior art keywords
switch
backflow prevention
prevention diode
power generation
solar cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2013152982A
Other languages
Japanese (ja)
Inventor
健一郎 寺本
Kenichiro Teramoto
健一郎 寺本
勝広 木曽
Katsuhiro Kiso
勝広 木曽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kawamura Electric Inc
Original Assignee
Kawamura Electric Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawamura Electric Inc filed Critical Kawamura Electric Inc
Priority to JP2013152982A priority Critical patent/JP2015023255A/en
Publication of JP2015023255A publication Critical patent/JP2015023255A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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

Abstract

PROBLEM TO BE SOLVED: To provide a joint box for photovoltaic power generation which is made compact, by allowing assembly of a switch, a backflow prevention diode, and the like, while saving the space.SOLUTION: A heat dissipation plate 4 wide enough to cover the apparatus attachment region entirely is placed tightly on the inner back plate 5a of a joint box 10, a diode module 2 is brought into tight contact with the heat dissipation plate 4, and a switch 1 is fixed onto the heat dissipation plate 4 via a switch mount 11. Back part of the switch mount 11 can be used as a heat dissipation space, a housing section is provided so that a portion of the diode module 2 overlaps the back of the switch 1, and the output terminal 1a of the switch 1 and the input terminal 20a of the diode module 2 are arranged closely to each other.

Description

本発明は、複数の太陽電池を備えた太陽光発電システムにおいて、個々の太陽電池が発電した電力を集電するための太陽光発電用接続箱に関する。   The present invention relates to a solar power generation connection box for collecting power generated by individual solar cells in a solar power generation system including a plurality of solar cells.

太陽光発電システムは、複数の太陽電池パネルにより発電が行われ、発電された直流電力が接続箱で１系統の出力にまとめられて、交流電力に変換するためのパワーコンディショナに送られる。そのため、接続箱には太陽電池をパワーコンディショナ等の回路から切り離すための開閉器や、太陽電池に電流が流れ込むのを防止する逆流防止ダイオード、更にはサージアブソーバ等が組み込まれている。   In the solar power generation system, power is generated by a plurality of solar battery panels, and the generated DC power is collected into one system output in a connection box and sent to a power conditioner for conversion to AC power. Therefore, the junction box incorporates a switch for disconnecting the solar cell from a circuit such as a power conditioner, a backflow prevention diode for preventing current from flowing into the solar cell, and a surge absorber.

また、このような接続箱は屋外に設置されるため、雨水等の侵入が無いように気密性を有するよう形成されるが、組み込まれた逆流防止ダイオードが発熱するため、この放熱対策が必要であった。例えば、特許文献１では逆流防止ダイオードを取り付けた放熱板を接続箱背面に近接させて配置し、対峙する放熱板及び接続箱の背面の双方に放熱シートを貼着して効率の良い放熱を実施させた。   In addition, since such a junction box is installed outdoors, it is formed to be airtight so that rainwater or the like does not enter, but the built-in backflow prevention diode generates heat, so this heat dissipation measure is necessary. there were. For example, in Patent Document 1, a heat sink with a backflow prevention diode attached is disposed close to the back of the junction box, and a heat radiation sheet is attached to both the opposite heat sink and the back of the junction box for efficient heat dissipation. I let you.

特表２０１３−５１２６３号公報Special table 2013-512263 gazette

上記従来の放熱構造では、放熱板から背板に対して効果的な放熱が実施された。しかしながら、空気層自体が無くなった訳ではないため、直付けに比べたら放熱効率が劣ったし、逆流防止ダイオードと開閉器とが同一の基板（放熱板）上に並べて組み付けられたため、収納効率が悪く接続箱が大きなものとなっていた。
一方で、発電規模の大型化が進んでおり、大型化により太陽電池ストリングの数も増加する。即ち、開閉器が増えるし逆流防止ダイオードの数も増加し、接続箱自体が大きくなっている。 In the conventional heat dissipation structure, effective heat dissipation was performed from the heat dissipation plate to the back plate. However, since the air layer itself is not lost, the heat dissipation efficiency is inferior compared to direct mounting, and the backflow prevention diode and the switch are assembled side by side on the same substrate (heat sink), so the storage efficiency is high The connection box was bad.
On the other hand, the scale of power generation is increasing, and the number of solar cell strings increases due to the increase in size. That is, the number of switches increases, the number of backflow prevention diodes also increases, and the junction box itself becomes larger.

そこで、本発明はこのような問題点に鑑み、開閉器、逆流防止ダイオード等の省スペースでの組み付けを可能とし、更に効率の良い放熱を可能として小型化を図った太陽光発電用接続箱を提供することを目的としている。   Therefore, in view of such problems, the present invention provides a solar power generation connection box that can be assembled in a space-saving manner, such as a switch and a backflow prevention diode, and can be more efficiently radiated. It is intended to provide.

上記課題を解決する為に、請求項１の発明は、複数の太陽電池パネルを直列に連結した太陽電池ストリングの出力線が接続される複数の開閉器と、前記開閉器の出力側に接続される逆流防止ダイオードと、前記太陽電池ストリングの出力を集線して送出するための端子台とが収納された太陽光発電用接続箱であって、当該接続箱の内部背板上に少なくとも前記開閉器の設置領域を覆う広さの放熱板を密着配置し、前記逆流防止ダイオードを前記放熱板に密着固定する一方、前記開閉器を開閉器取付台を介して前記放熱板上に固定し、前記開閉器取付台は、前記放熱板との間に放熱空間を有すると共に、前記逆流防止ダイオードを前記端子へ接続するための導体配設部を備えて成ることを特徴とする。
この構成によれば、接続箱の少なくとも開閉器の取付領域を覆う広さの放熱板を配置し、然も背板に密着させるため良好な放熱を実施できる。そして、開閉器取付台に放熱空間及び導体配設部を備えることで、放熱板上に開閉器を配置しても良好な放熱を維持できるし、別途配線空間を設ける必要が無く、接続箱の小型化に寄与する。 In order to solve the above problem, the invention of claim 1 is connected to a plurality of switches to which output lines of solar cell strings in which a plurality of solar cell panels are connected in series are connected, and to an output side of the switch. And a terminal block for collecting and sending the output of the solar cell string, and at least the switch on the inner back plate of the connection box. A heat sink having a width covering the installation area is closely arranged, and the backflow prevention diode is closely fixed to the heat sink, while the switch is fixed on the heat sink via a switch mounting base, The device mounting base has a heat radiating space between the heat radiating plate and a conductor disposition portion for connecting the backflow prevention diode to the terminal.
According to this structure, since the heat sink of the width which covers the attachment area | region of at least a switch of a junction box is arrange | positioned and it adheres to a back board still, favorable heat dissipation can be implemented. And by providing the heat dissipation space and the conductor arrangement part on the switch mounting base, good heat dissipation can be maintained even if the switch is arranged on the heat sink, and there is no need to provide a separate wiring space. Contributes to downsizing.

請求項２の発明は、請求項１に記載の構成において、前記開閉器取付台には、前記逆流防止ダイオードの収容部が設けられ、前記収容部は、前記逆流防止ダイオードの少なくとも一部が前記開閉器の背部に入り込むよう形成され、前記逆流防止ダイオードの入力端子を前記開閉器の出力端子に近接して配置可能としたこを特徴とする。
この構成によれば、逆流防止ダイオードを開閉器の背部に潜り込ませるように配置するため、開閉器の出力端子と逆流防止ダイオードの入力端子とをスムーズに近接配置でき、少ない導体で両者を接続できる。また、逆流防止ダイオードの少なくとも一部と開閉器を重ね合わせて収納するため、省スペースで収納でき、接続箱の小型化に寄与する。 According to a second aspect of the present invention, in the configuration according to the first aspect, the switch mounting base is provided with a housing portion for the backflow prevention diode, and the housing portion includes at least a part of the backflow prevention diode. It is formed so as to enter the back of the switch, and the input terminal of the backflow prevention diode can be arranged close to the output terminal of the switch.
According to this configuration, since the backflow prevention diode is disposed so as to be embedded in the back of the switch, the output terminal of the switch and the input terminal of the backflow prevention diode can be smoothly arranged close to each other, and both can be connected with a small number of conductors. . In addition, since at least a part of the backflow prevention diode and the switch are stored in an overlapping manner, it can be stored in a small space and contributes to downsizing of the junction box.

請求項３の発明は、請求項１又は２に記載の構成において、当該接続箱を取付対象に固定するための取付片が左右側部に突設され、前記取付片は当該接続箱の背板に対して後方に突出して且つ背板に平行な取付面を有することを特徴とする。
この構成によれば、取付片は接続箱背板より後方に突出しているため、取付対象が平坦な壁面であっても、取り付けた接続箱と取付対象との間には隙間が形成される。よって、逆流防止ダイオードの発熱を受けて背板が高温になっても、隙間で空気の対流が発生して放熱させることができ、熱がこもるのを防止できる。 According to a third aspect of the present invention, in the configuration according to the first or second aspect, an attachment piece for fixing the connection box to an attachment target is provided on the left and right sides, and the attachment piece is a back plate of the connection box. And a mounting surface parallel to the back plate.
According to this configuration, since the attachment piece protrudes rearward from the connection box back plate, even if the attachment object is a flat wall surface, a gap is formed between the attached connection box and the attachment object. Therefore, even if the back plate is heated to a high temperature due to the heat generated by the backflow prevention diode, air convection can be generated in the gap to dissipate heat, and heat can be prevented from being accumulated.

本発明によれば、開閉器背部に放熱空間及び導体配設部を備えるため、放熱板上に開閉器を配置しても良好な放熱を維持できるし、別途配線空間を設ける必要がなく、接続箱の小型化に寄与する。
また、逆流防止ダイオードを開閉器取付台に収納し、且つ少なくとも一部を開閉器と重ね合わせて収納すれば、省スペースで収納でき、接続箱の小型化に寄与する。 According to the present invention, since the heat radiating space and the conductor arrangement portion are provided on the back of the switch, good heat radiation can be maintained even if the switch is arranged on the heat radiating plate, and there is no need to provide a separate wiring space. Contributes to downsizing of the box.
Further, if the backflow prevention diode is accommodated in the switch mounting base and at least a part of the backflow prevention diode is overlapped and accommodated with the switch, it can be stored in a space-saving manner, contributing to downsizing of the junction box.

本発明に係る太陽光発電用接続箱の一例を示す説明図であり、蓋板を外した正面図を示している。It is explanatory drawing which shows an example of the connection box for solar power generation concerning this invention, and has shown the front view which removed the cover plate. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. Ｃ部の拡大図である。It is an enlarged view of the C section. 図１のＢ−Ｂ線断面図である。It is the BB sectional view taken on the line of FIG. 図１の接続箱と結晶系の太陽電池ストリングの関係を示す模式図である。It is a schematic diagram which shows the relationship between the junction box of FIG. 1, and a crystalline solar cell string. 図１の接続箱と薄膜系の太陽電池ストリングの関係を示す模式図である。It is a schematic diagram which shows the relationship between the junction box of FIG. 1, and a thin film type solar cell string. 開閉器取付台の正面図である。It is a front view of a switch mounting base. 開閉器取付台の底面図である。It is a bottom view of a switch mounting base. Ｄ−Ｄ線断面図である。It is DD sectional view taken on the line. 開閉器取付台の断面を模式的に示した図である。It is the figure which showed typically the cross section of the switch mounting base.

以下、本発明を具体化した実施の形態を、図面を参照して詳細に説明する。図１は本発明に係る太陽光発電用接続箱の一例を示し、蓋板を外した接続箱の正面図を示している。図１において、１は太陽電池ストリングから配設された配線が接続される開閉器、２は一対のダイオード（逆流防止ダイオード）が組み込まれたダイオードモジュール、３は集電した電力を１系統で出力するための端子台、４はダイオードモジュール２で発生する熱を放熱させるための放熱板、５は接続箱本体、６は接続箱本体５を壁面等の取付対象に固定するための取付片である。
また、図１に示す配線７は、太陽電池ストリングの出力であるダイオードモジュール２の出力を端子台３に接続する配線を示し、端子台３から送出される１系統の出力線等は省略してある。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an example of a connection box for photovoltaic power generation according to the present invention, and shows a front view of a connection box with a cover plate removed. In FIG. 1, 1 is a switch to which wiring arranged from a solar cell string is connected, 2 is a diode module incorporating a pair of diodes (backflow prevention diodes), and 3 is a system that outputs collected power in one system 4 is a heat sink for radiating heat generated in the diode module 2, 5 is a connection box body, and 6 is an attachment piece for fixing the connection box body 5 to an attachment object such as a wall surface. .
Moreover, the wiring 7 shown in FIG. 1 shows the wiring which connects the output of the diode module 2 which is an output of a solar cell string to the terminal block 3, and omits one system output line etc. sent from the terminal block 3. is there.

尚、開閉器１の出力端子とダイオードモジュール２との接続はインサート成型された導体よって接続されるため、表面に表れない。また、開閉器１に接続される太陽電池ストリングからの配線は、接続箱本体５の側面或いは底面に設けられた開口部から導入される。また、ダイオードモジュール２は、例えば５００Ｖ、２０Ａ仕様等が適用される。   Since the connection between the output terminal of the switch 1 and the diode module 2 is connected by an insert-molded conductor, it does not appear on the surface. Moreover, the wiring from the solar cell string connected to the switch 1 is introduced from an opening provided on the side surface or the bottom surface of the connection box body 5. The diode module 2 is applied with, for example, 500V, 20A specifications.

放熱板４は、接続箱内の機器取付領域全体に亘る大きさを有する平坦な金属板で形成されている。また、上下辺は変形しないよう、また取り付け／取り外し時には取っ手として使用可能に帯状に折り曲げられている。
そして、図２のＡ−Ａ線断面図に示すように、接続箱本体５の背板５ａにボルト８によりネジ止めされ、背板５ａに密着している。 The heat radiating plate 4 is formed of a flat metal plate having a size over the entire device mounting area in the junction box. Further, the upper and lower sides are bent so as not to be deformed and can be used as a handle at the time of attachment / removal.
And as shown in the AA sectional view of FIG. 2, it is screwed to the back plate 5a of the connection box main body 5 with a bolt 8 and is in close contact with the back plate 5a.

開閉器１及び端子台３は、放熱板４に対して空間を設けて取り付けられている。特に開閉器１は、合成樹脂製の開閉器取付台１１を介して放熱板４に取り付けられている。この開閉器取付台１１は、開閉器１と放熱板４との間に放熱を促す放熱空間が上下に亘り背部に形成され、ダイオードモジュール２の出力を端子台３に接続するためにインサート成型された導体配設部を有している。そして、端子台３は、鋼板を折り曲げ形成した台座１２を介して放熱板４に取り付けられている。
図１０は、この開閉器取付台１１の断面を模式的に示した図であり、ダイオードモジュール２の出力端子と開閉器取付台１１の出力端子１６とが導体１８により接続されている様子を示している。出力端子１６は、２つのダイオードモジュール２の出力がそれぞれ接続される。尚、１８ａは導体１８をインサート成型した導体配設部を示している。 The switch 1 and the terminal block 3 are attached to the heat sink 4 with a space. In particular, the switch 1 is attached to the heat sink 4 via a switch mounting base 11 made of synthetic resin. The switch mounting base 11 is formed with a heat radiation space between the switch 1 and the heat radiating plate 4 to promote heat dissipation in the back and up, and is insert-molded to connect the output of the diode module 2 to the terminal block 3. And a conductor arrangement portion. And the terminal block 3 is attached to the heat sink 4 via the base 12 which bent and formed the steel plate.
FIG. 10 is a diagram schematically showing a cross section of the switch mounting base 11, and shows a state in which the output terminal of the diode module 2 and the output terminal 16 of the switch mounting base 11 are connected by a conductor 18. ing. The output terminals 16 are connected to the outputs of the two diode modules 2, respectively. In addition, 18a has shown the conductor arrangement | positioning part which insert-molded the conductor 18. FIG.

図３はＣ部拡大図を示し、ダイオードモジュール２と放熱板４の関係を示している。ダイオードモジュール２の底部（端子配置面に対向する面）には放熱板２ａが一体形成され、放熱板４に密着して良好な放熱が実施される。   FIG. 3 is an enlarged view of the C portion, and shows the relationship between the diode module 2 and the heat sink 4. A heat radiating plate 2a is integrally formed on the bottom of the diode module 2 (the surface facing the terminal arrangement surface), and is in close contact with the heat radiating plate 4 for good heat dissipation.

図４はＢ−Ｂ線断面を示し、図４に示すように取付片６は接続箱本体５の背板５ａの背部に固着されて側方に突出形成され、突出部には壁面等の取付対象にボルト止めするための孔６ａ（図１に示す）が設けられている。尚、取付片６は平坦な板体で形成され、背板５ａより僅かに後方に突出して配置されているが、後方に伸ばす脚部を設けて更に後方に突出させても良い。   FIG. 4 shows a cross section taken along line B-B. As shown in FIG. 4, the mounting piece 6 is fixed to the back portion of the back plate 5a of the junction box body 5 so as to protrude sideways. A hole 6a (shown in FIG. 1) for bolting the object is provided. The mounting piece 6 is formed of a flat plate and is disposed so as to protrude slightly rearward from the back plate 5a. However, a leg portion extending rearward may be provided to further protrude rearward.

図５，図６は、接続箱と太陽電池ストリングの関係を示す模式図であり、図５，図６に示すように、個々の開閉器１には、並列接続された一対の太陽光ストリングが接続される。具体的に、図５は結晶系太陽電池素子で構成された太陽電池１３ａにより形成された太陽電池ストリング１３が接続された構成を示している。太陽電池が結晶系の場合、図５に示すように、各太陽電池ストリング１３に逆流防止ダイオード１４を組み込むことで並列接続でき、２本ずつ並列接続した後に接続箱１０に導入されて開閉器１に接続される。尚、２０はダイオードモジュール２に組み込まれた逆流防止ダイオードを示している。   5 and 6 are schematic diagrams showing the relationship between the junction box and the solar cell string. As shown in FIGS. 5 and 6, each switch 1 has a pair of solar strings connected in parallel. Connected. Specifically, FIG. 5 shows a configuration in which a solar cell string 13 formed by a solar cell 13a composed of crystalline solar cell elements is connected. When the solar cell is a crystal system, as shown in FIG. 5, each solar cell string 13 can be connected in parallel by incorporating a backflow prevention diode 14, and two of them are connected in parallel and then introduced into the connection box 10 to be opened and closed. Connected to. Reference numeral 20 denotes a backflow prevention diode incorporated in the diode module 2.

一方、図６は薄膜系太陽電池素子で構成された太陽電池１５ａにより形成された太陽電池ストリング１５が接続された構成を示している。太陽電池が薄膜系の場合、図６に示すように直接並列接続でき、２本ずつ並列接続した後に接続箱１０に導入されて開閉器１に接続される。   On the other hand, FIG. 6 shows a configuration in which solar cell strings 15 formed by solar cells 15a composed of thin film solar cell elements are connected. When the solar cell is a thin film system, it can be directly connected in parallel as shown in FIG. 6 and connected in parallel to the switch 1 after being connected in parallel two by two.

図７は開閉器１及びダイオードモジュール２を組み付けた開閉器取付台１１の正面図、図８はその底面図、図９はＤ−Ｄ線断面図を示している。開閉器取付台１１は、ネジ挿通孔を備えた固定用脚部１１ａを４隅に備えると共に、固定用脚部１１ａの間には所定間隔で脚部１１ｂが設けられ、下部に設置したダイオードモジュール２の放熱を促す放熱空間が上下に亘り形成されている。この開閉器取付台１１は、固定用脚部１１ａに挿通したネジ１７により放熱板４に固定される。   FIG. 7 is a front view of the switch mounting base 11 in which the switch 1 and the diode module 2 are assembled, FIG. 8 is a bottom view thereof, and FIG. 9 is a sectional view taken along the line DD. The switch mounting base 11 includes fixing leg portions 11a having screw insertion holes at four corners, and leg portions 11b are provided at predetermined intervals between the fixing leg portions 11a. The heat radiation space which promotes heat radiation of 2 is formed up and down. The switch mounting base 11 is fixed to the heat radiating plate 4 with screws 17 inserted through the fixing legs 11a.

また、開閉器取付台１１にはダイオードモジュール２を収容するための開口部１１ｃが設けられている。図９に示すように、開口部１１ｃは、開閉器１の入力端子側に、収容したダイオードモジュール２の一部が開閉器１の背部に潜り込むように形成され、且つ接続端子が配置されたダイオードモジュール２の上面が露出するように形成されている。   Further, the switch mounting base 11 is provided with an opening 11 c for accommodating the diode module 2. As shown in FIG. 9, the opening 11c is formed on the input terminal side of the switch 1 so that a part of the accommodated diode module 2 is embedded in the back of the switch 1, and the connection terminal is arranged. It is formed so that the upper surface of the module 2 is exposed.

尚、ダイオードモジュール２は、図７に示すように上面に３端子（２個の入力端子２０ａと１個の出力端子２０ｂ）が配置され、放熱板４にネジ止め（図示せず）されている。
また、１ａは開閉器１の入力端子であり、図示しない出力端子は、図１０に示すインサート成型によって備えられた導体１８を通じてダイオードモジュール２に接続される。 As shown in FIG. 7, the diode module 2 has three terminals (two input terminals 20a and one output terminal 20b) arranged on the upper surface, and is screwed to the heat radiating plate 4 (not shown). .
Reference numeral 1a denotes an input terminal of the switch 1, and an output terminal (not shown) is connected to the diode module 2 through a conductor 18 provided by insert molding shown in FIG.

このように、接続箱１０の機器取付領域全体に放熱板４を配置し、然も背板に密着させるため良好な放熱を実施できる。そして、開閉器取付台１１に放熱空間及び導体配設部１８ａを備えることで、放熱板４上に開閉器１を配置しても良好な放熱を維持できるし、別途配線空間を設ける必要が無く、接続箱の小型化に寄与する。
また、ダイオードモジュール２（逆流防止ダイオード２０）を開閉器１の背部に潜り込ませるように配置するため、開閉器１の出力端子１ａとダイオードモジュール２の入力端子２ａとをスムーズに近接配置でき、短い配線で両者を接続できるし、ダイオードモジュール２の少なくとも一部と開閉器１を重ね合わせて収納するため、省スペースで収納でき、接続箱１０の小型化に寄与する。
更に、取付片６は接続箱背板５ａより後方に突出しているため、取付対象が平坦な壁面であっても、取り付けた接続箱１０と取付対象との間には隙間が形成される。よって、ダイオードモジュール２の発熱を受けて背板５ａが高温になっても、隙間で空気の対流が発生して放熱させることができ、熱がこもるのを防止できる。 Thus, since the heat sink 4 is arrange | positioned in the whole apparatus attachment area | region of the connection box 10, and it is made to contact | adhere to a back plate, favorable heat dissipation can be implemented. Further, by providing the switch mounting base 11 with the heat dissipation space and the conductor disposing portion 18a, good heat dissipation can be maintained even if the switch 1 is disposed on the heat dissipation plate 4, and there is no need to provide a separate wiring space. Contributes to downsizing of the junction box.
In addition, since the diode module 2 (backflow prevention diode 20) is arranged so as to be embedded in the back of the switch 1, the output terminal 1a of the switch 1 and the input terminal 2a of the diode module 2 can be smoothly arranged close to each other. Both can be connected by wiring, and at least a part of the diode module 2 and the switch 1 are stored in an overlapping manner, so that they can be stored in a space-saving manner and contribute to the downsizing of the connection box 10.
Furthermore, since the attachment piece 6 protrudes rearward from the connection box back plate 5a, a gap is formed between the attached connection box 10 and the attachment object even if the attachment object is a flat wall surface. Therefore, even if the back plate 5a is heated to a high temperature due to the heat generated by the diode module 2, air convection can be generated in the gap to dissipate heat, and heat can be prevented from being accumulated.

尚、上記実施形態では、逆流防止ダイオード２０を１対備えたダイオードモジュール２を使用しているが、モジュール化されていないダイオードを逆流防止ダイオード２０としても良い。また、ダイオードモジュール２の一部を開閉器１と重ねるように配置しているが、ダイオードモジュール２全体を開閉器１の背部に配置しても良く、更に接続箱１０の小型化に貢献できる。
また、開閉器取付台１１にはインサート成型により導体１８を配設しているが、ダイオードモジュール２出力の配線は、放熱空間を利用して電線を配設して行っても良い。
更に、放熱板４の大きさを機器取付領域全体を覆う広さとしているが、少なくとも開閉器１の取付領域を覆う広さであれば、外部に対して良好な放熱は可能である。 In the above embodiment, the diode module 2 having a pair of backflow prevention diodes 20 is used, but a diode that is not modularized may be used as the backflow prevention diode 20. Further, although a part of the diode module 2 is arranged so as to overlap with the switch 1, the entire diode module 2 may be arranged on the back of the switch 1, which can further contribute to downsizing of the junction box 10.
Moreover, although the conductor 18 is arrange | positioned by insert molding in the switch mounting base 11, you may perform the wiring of the diode module 2 output by arrange | positioning an electric wire using thermal radiation space.
Furthermore, although the size of the heat radiating plate 4 is wide enough to cover the entire device mounting area, good heat dissipation is possible to the outside as long as it covers at least the mounting area of the switch 1.

１・・開閉器、１ａ・・出力端子、２・・ダイオードモジュール、３・・端子台、４・・放熱板、５・・接続箱本体、１０・・接続箱、１１・・開閉器取付台、１１ａ・・開口部（ダイオードモジュール収容部）、１３，１５・・太陽電池ストリング、１８・・導体、１８ａ・・導体配設部、２０・・逆流防止ダイオード、２０ａ・・入力端子。   1 .... Switch, 1a ... Output terminal 2 .... Diode module 3 .... Terminal block 4 .... Heat sink 5 .... Connection box body 10 .... Connection box 11, ... Switch mounting base 11a ... Opening (diode module housing) 13, 15 ... Solar cell string, 18 ... Conductor, 18a ... Conductor arrangement, 20 ... Backflow prevention diode, 20a ... Input terminal.

Claims (3)

複数の太陽電池パネルを直列に連結した太陽電池ストリングの出力線が接続される複数の開閉器と、前記開閉器の出力側に接続される逆流防止ダイオードと、前記太陽電池ストリングの出力を集線して送出するための端子台とが収納された太陽光発電用接続箱であって、
当該接続箱の内部背板上に少なくとも前記開閉器の設置領域を覆う広さの放熱板を密着配置し、
前記逆流防止ダイオードを前記放熱板に密着固定する一方、前記開閉器を開閉器取付台を介して前記放熱板上に固定し、
前記開閉器取付台は、前記放熱板との間に放熱空間を有すると共に、前記逆流防止ダイオードを前記端子へ接続するための導体配設部を備えて成ることを特徴とする太陽光発電用接続箱。 A plurality of switches to which output lines of solar cell strings in which a plurality of solar cell panels are connected in series are connected, a backflow prevention diode connected to the output side of the switch, and outputs of the solar cell strings are concentrated. A junction box for photovoltaic power generation in which a terminal block for sending
A heat sink having a width that covers at least the installation area of the switch is disposed on the inner back plate of the junction box,
While fixing the backflow prevention diode tightly to the heat sink, the switch is fixed on the heat sink via a switch mount,
The switch mounting base has a heat radiation space between the heat sink and a conductor arrangement for connecting the backflow prevention diode to the terminal. box. 前記開閉器取付台には、前記逆流防止ダイオードの収容部が設けられ、
前記収容部は、前記逆流防止ダイオードの少なくとも一部が前記開閉器の背部に入り込むよう形成され、
前記逆流防止ダイオードの入力端子を前記開閉器の出力端子に近接して配置可能としたこを特徴とする請求項１記載の太陽光発電用接続箱。 The switch mounting base is provided with a receiving portion for the backflow prevention diode,
The accommodating portion is formed such that at least a part of the backflow prevention diode enters the back portion of the switch,
The connection box for photovoltaic power generation according to claim 1, wherein an input terminal of the backflow prevention diode can be arranged close to an output terminal of the switch. 当該接続箱を取付対象に固定するための取付片が左右側部に突設され、前記取付片は当該接続箱の背板に対して後方に突出して且つ背板に平行な取付面を有することを特徴とする請求項１又は２記載の太陽光発電用接続箱。 Mounting pieces for fixing the connection box to the mounting target are provided on the left and right sides, and the mounting pieces protrude rearward with respect to the back plate of the connection box and have a mounting surface parallel to the back plate. The junction box for photovoltaic power generation according to claim 1 or 2.
JP2013152982A 2013-07-23 2013-07-23 Joint box for photovoltaic power generation Pending JP2015023255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013152982A JP2015023255A (en) 2013-07-23 2013-07-23 Joint box for photovoltaic power generation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013152982A JP2015023255A (en) 2013-07-23 2013-07-23 Joint box for photovoltaic power generation

Publications (1)

Publication Number Publication Date
JP2015023255A true JP2015023255A (en) 2015-02-02

Family

ID=52487430

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013152982A Pending JP2015023255A (en) 2013-07-23 2013-07-23 Joint box for photovoltaic power generation

Country Status (1)

Country Link
JP (1) JP2015023255A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016127623A (en) * 2014-12-26 2016-07-11 日東工業株式会社 Heat dissipation structure in collector box for photovoltaic power generation system
JP2016152656A (en) * 2015-02-16 2016-08-22 河村電器産業株式会社 Connection box for photovoltaic power generation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000173376A (en) * 1998-12-03 2000-06-23 Kawamura Electric Inc Solar battery switch
JP2000261177A (en) * 1999-03-05 2000-09-22 Nitto Electric Works Ltd Current collection box for solar power generating system
JP2000357812A (en) * 1999-04-15 2000-12-26 Canon Inc Solar battery module and generation device
JP2011228573A (en) * 2010-04-22 2011-11-10 Sumitomo Wiring Syst Ltd Terminal box for solar cell module
JP2012243867A (en) * 2011-05-17 2012-12-10 Kawamura Electric Inc Connection box for photovoltaic power generation
JP2013048180A (en) * 2011-08-29 2013-03-07 Mitsubishi Electric Corp Connection box for photovoltaic generation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000173376A (en) * 1998-12-03 2000-06-23 Kawamura Electric Inc Solar battery switch
JP2000261177A (en) * 1999-03-05 2000-09-22 Nitto Electric Works Ltd Current collection box for solar power generating system
JP2000357812A (en) * 1999-04-15 2000-12-26 Canon Inc Solar battery module and generation device
JP2011228573A (en) * 2010-04-22 2011-11-10 Sumitomo Wiring Syst Ltd Terminal box for solar cell module
JP2012243867A (en) * 2011-05-17 2012-12-10 Kawamura Electric Inc Connection box for photovoltaic power generation
JP2013048180A (en) * 2011-08-29 2013-03-07 Mitsubishi Electric Corp Connection box for photovoltaic generation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016127623A (en) * 2014-12-26 2016-07-11 日東工業株式会社 Heat dissipation structure in collector box for photovoltaic power generation system
JP2016152656A (en) * 2015-02-16 2016-08-22 河村電器産業株式会社 Connection box for photovoltaic power generation

Similar Documents

Publication Publication Date Title
US20230370019A1 (en) Electrically Isolated Heat Dissipating Junction Box
JP3357808B2 (en) Solar cell device
US20090084570A1 (en) Low Profile Photovoltaic (LPPV) Box
US20080110490A1 (en) Photovoltaic connection system
US20130308275A1 (en) Electronic component mounting module and power conversion apparatus
US8358506B2 (en) Mechanical arrangement for use within galvanically-isolated, low-profile micro-inverters for solar power installations
US20080253092A1 (en) Heat Dissipation System for Photovoltaic Interconnection System
JP5527354B2 (en) Power converter
TWI723001B (en) Photovoltaic modules including external bypass diodes and assembly comprising the same
US9343600B2 (en) Integrated microinverter housing for a PV AC module
JP5963124B2 (en) box
JP5951360B2 (en) Outdoor installation equipment
JP2015023255A (en) Joint box for photovoltaic power generation
JP2012244770A5 (en) box
JP5382538B2 (en) Connection box for photovoltaic system
JP2012244769A (en) Power collection box
KR101539653B1 (en) Solar junction box for crystalline modules
JP6448402B2 (en) Connection box for photovoltaic power generation
JP3172419U (en) Connection box for photovoltaic system
JP2015023254A (en) Joint box for photovoltaic power generation
JP2013021193A (en) Terminal box for solar cell module and solar cell module
JP6870458B2 (en) Power converter
JP2020205345A (en) Housing, and electrical equipment and electric power conversion system including the same
TWM461935U (en) Inverter module
JP2005252303A (en) Terminal box apparatus for solar cell module

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160324

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170127

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170131

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20170801