CN109687814B - Solar cell module and solar photovoltaic power generation system - Google Patents
Solar cell module and solar photovoltaic power generation system Download PDFInfo
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- CN109687814B CN109687814B CN201811199054.XA CN201811199054A CN109687814B CN 109687814 B CN109687814 B CN 109687814B CN 201811199054 A CN201811199054 A CN 201811199054A CN 109687814 B CN109687814 B CN 109687814B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/20—Supporting structures directly fixed to an immovable object
- H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
- H02S20/23—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
- H02S20/25—Roof tile elements
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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
Abstract
The invention provides a solar cell module and a solar photovoltaic power generation system. The solar cell module is provided with: the solar cell module comprises a first frame piece (a frame piece (30) on the eave side) and a second frame piece (a frame piece (40) on the ridge purlin side) which are respectively fixed on the peripheral edge parts of two opposite sides of a quadrangular solar cell module main body (2) and are formed by conductors with insulating coatings on the surfaces. The first frame piece and the second frame piece have first and second connection portions for connecting to second and first frame pieces of another adjacent solar cell module (1'). The second connecting part has a conductive member (50) fixed in a state of being electrically connected to the inside of the conductor, and the first connecting part has a conduction securing part from which the insulating coating of the portion in contact with the conductive member is removed.
Description
Application/priority related citations
The present application claims priority of japanese patent application No. 2017-201711, which was filed on the basis of 2017, 10, 18, and 18 days. The contents of which are incorporated into the present application by reference herein.
Technical Field
The present invention relates to a solar cell module and a solar photovoltaic system, and more particularly, to a solar cell module and a solar photovoltaic system in which a frame fixed to a solar cell module main body is electrically connected to each other when adjacent solar cell modules are connected to each other.
Background
Conventionally, a tile-integrated solar cell module is known, which has a function of a roof tile and is arranged in a mixed manner with a general roof tile. In such a solar cell module, the peripheral edge portion of the solar cell module main body is held by a metal frame, and the frames are connected to each other between the adjacent solar cell modules, and are also electrically connected to the connection portions. Thus, if the frame of any one of the solar cell modules connected to each other is grounded, all the solar cell modules can be grounded, and it is not necessary to provide a ground wiring for grounding to the individual solar cell modules.
That is, for example, in the solar cell module described in japanese patent application laid-open No. 2014-30013, a frame made of an aluminum alloy is used, and an insulating film is formed on the surface thereof by aluminum anodizing. Therefore, in order to ensure conduction at the connection portion, a plate spring is attached to one of the housings, and the housing is fastened to the housing with a screw made of stainless steel, and is also electrically connected to the housing. In the other housing, a portion in contact with the leaf spring is made of a different member made of, for example, plated steel plate.
More specifically, as a third embodiment of the aforementioned japanese patent application laid-open publication No. 2014-30013, a fixing piece is provided on an upper portion of a frame piece on the ridge purlin side of one frame body, and a tip end portion of a mounting piece of the other frame body is held in an embedded manner between the fixing piece and the upper portion of the frame piece on the ridge purlin side. At this time, the leaf spring attached to the fixed piece is pressed by the distal end portion of the mounting piece and elastically deformed, and therefore, the pressing state of the leaf spring and the mounting piece is stabilized by the reaction force thereof, and electrical connection (conduction) is ensured.
However, in the structure of the above-described conventional example, the mounting piece is made of a material having conductivity such as stainless steel in order to ensure electrical connection between the plate spring and the mounting piece in the coupling portion, but in this case, since the mounting pieces are overlapped, the weight of the solar cell module itself increases, and the center of gravity balance shifts, which causes a problem that it is difficult to construct. Even if the material of the mounting sheet is replaced with a lightweight aluminum alloy or an aluminum alloy is generally used for the housing of the solar cell module to integrate the housing and the mounting sheet, the surface of the aluminum alloy is insulated and coated from the viewpoint of durability, and therefore, the aluminum alloy cannot be used directly for the mounting sheet that requires conductivity. Therefore, in addition to the mounting sheet being a separate member from the aluminum alloy frame, since these are different types of metals, the problem of complication of the manufacturing process of the solar cell module and increase in cost may be caused.
The present invention has been made in view of such circumstances, and an object thereof is to connect the frames of adjacent solar cell modules to each other, to ensure electrical connection at the connection portions, to facilitate the construction related to grounding of the solar cell modules, and to achieve weight reduction and simplification of the structure of the solar cell modules.
Disclosure of Invention
In order to achieve the above object, a solar cell module according to the present invention includes a solar cell module main body having a quadrangular shape; and a solar cell module which is fixed to peripheral edges of two opposing sides of the solar cell module main body, respectively, and has a first frame piece and a second frame piece formed of a conductor having an insulating coating on a surface thereof, wherein the first frame piece and the second frame piece include a first connecting portion and a second connecting portion for connecting to the second frame piece and the first frame piece of another adjacent solar cell module, the second connecting portion includes a conductive member fixed in a state of being electrically connected to an inside of the conductor, and the first connecting portion includes a conduction securing portion from which a portion of the insulating coating abutting against the conductive member is removed.
In the solar photovoltaic system according to the present invention, a plurality of solar cell modules as described above are connected and installed on a roof, and either one of the first frame piece and the second frame piece is grounded.
According to the solar cell module and the photovoltaic power generation system of the present invention, electrical connection can be ensured at the connection portion that connects the frames of the adjacent solar cell modules, and the solar cell module can be reduced in weight to improve workability.
Drawings
Fig. 1 is a perspective view of the entire structure of the solar cell module according to the first embodiment, as viewed from the light-receiving surface side.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is an exploded perspective view of a portion C in fig. 1 as viewed from the direction of an arrow C1.
Fig. 4 is an exploded perspective view of a portion D in fig. 1 as viewed from the direction of an arrow D1.
Fig. 5 is an exploded perspective view of a portion E in fig. 1 as viewed from the direction of an arrow E1.
Fig. 6 is an exploded perspective view of a portion F in fig. 1 as viewed from the direction of an arrow F1.
Fig. 7 is an enlarged view of the connection portion of the frame pieces on the eave side and the ridge purlin side, showing the cross-sectional structure thereof.
Fig. 8 is an exploded perspective view showing a structure for electrical connection at the connection portion.
Fig. 9 is a cross-sectional view of the solar cell module laid on the roof as viewed from the right side.
Fig. 10 is a view corresponding to fig. 7 of the second embodiment, in which the vertical wall portion of the frame piece on the eave side is integrally provided to the connecting piece.
Detailed Description
[ first embodiment ]
Hereinafter, a solar cell module according to a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing the entire structure of the solar cell module when viewed from the light-receiving surface side, and a cross section along line a-a of fig. 1 is enlarged and shown in fig. 2.
The solar cell module 1 of the present embodiment is a tile-integrated solar cell module having a function of a roof tile itself and being arranged on a roof in a mixed manner with a normal roof tile, and includes a rectangular solar cell module main body 2 and a frame 3 holding the entire periphery thereof as shown in fig. 1. The solar cell module main body 2 is formed by laminating a light-transmitting substrate on the light receiving surface side, a back sheet (not shown) for insulating and protecting the solar cell and the back surface side, and they are bonded to each other with a sealing material. Then, the solar light incident from the light receiving surface of the solar cell module body 2 enters the solar cell to generate electric power. In the present embodiment, the type of solar cell used for the solar cell module main body 2 is not particularly limited, and examples thereof include silicon solar cells such as single crystal, polycrystalline, and thin film, compound solar cells such as GaAs, CdTe, and CdS, and organic solar cells such as dye-sensitized and organic thin film.
The frame 3 is composed of four elongated frame pieces 10, 20, 30, and 40 attached to the peripheral edge portion of the solar cell module main body 2, and adjacent end portions are abutted against each other in the circumferential direction thereof and fixed by a screw member or the like. Each of the frame pieces 10, 20, 30, and 40 is manufactured by extrusion molding of an aluminum alloy, and includes vertical wall portions 11, 21, 31, 41a, and 41b extending in the vertical direction at respective cross sections orthogonal to each other in the longitudinal direction. That is, the vertical wall portions 11, 21, 31, 41a, 41b extend downward with respect to the rear surface of the solar cell module main body 2.
In the present embodiment, the frame pieces 10, 20 of the frame pieces 10, 20, 30, 40 are fixed to the short-side edge of the solar cell module main body 2, and the frame pieces 30, 40 are fixed to the long-side edge of the solar cell module main body 2. As will be described in detail with reference to fig. 9, since the frame piece 10 is positioned on the left side and the frame piece 20 is positioned on the right side when viewed from the eaves side of the roof when the solar cell module 1 is installed on the roof, only the left and right sides will be referred to as the left and right sides hereinafter, the frame piece 10 will be referred to as the left frame piece 10, and the frame piece 20 will be referred to as the right frame piece 20 when viewed from the eaves side of the roof.
When the solar cell module 1 is installed on a roof in this manner, the frame piece 30 of the frame pieces 10, 20, 30, and 40 is positioned on the eave side of the roof, and the frame piece 40 is positioned on the ridge purlin side of the roof. That is, the solar cell module 1 is disposed such that the frame piece 30 is located on the lower side of the roof in the water flow direction and the frame piece 40 is located on the upper side of the roof in the water flow direction. Hereinafter, the frame piece 30 is referred to as a eaves-side frame piece 30, and the frame piece 40 is referred to as a ridge purlin-side frame piece 40.
The four frame pieces 10, 20, 30, and 40 are fixed to each other, and the left and right ends of the eave-side frame piece 30 are fixed to the eave-side ends of the left and right frame pieces 10 and 20, respectively, and the ridge-purlin-side ends of the left and right frame pieces 10 and 20 are fixed to the left and right ends of the ridge-purlin-side frame piece 40, respectively. The fixed structure will be described below with reference to exploded perspective views (fig. 3 to 6) of the C to F portions in fig. 1, respectively, as viewed from the directions of arrows C1 to F1.
First, as shown in fig. 3, the upper and lower pair of holding pieces 12a and 12b holding the solar cell module main body 2 are cut out by a predetermined length at one end portion (end portion on the ridge purlin side) of the left frame piece 10, and one end portion (end portion on the front side in fig. 3) of the frame piece 40 on the ridge purlin side is fitted to the cut-out portion and fastened by the screw member 60. Therefore, two screw holes 11a are provided in the vertical wall portion 11 of the left frame piece 10 corresponding to the two screw groove portions 42a and 42b of the frame piece 40 provided on the ridge purlin side.
As shown in fig. 4, the upper and lower pair of holding pieces 12a and 12b are partially cut off at the other end (eave-side end) of the left frame piece 10, and the end of the eave-side frame piece 30 is fitted thereto and fastened by a screw member 60. Therefore, two screw holes 31a are provided in the vertical wall portion 31 of the eaves-side frame piece 30 so as to correspond to the two screw groove portions 13 and 14 provided in the left-side frame piece 10, and the screw members 60 are screwed into the screw holes in alignment with the positions of the screw holes, whereby the left-side frame piece 10 and the eaves-side frame piece 30 are fastened.
As shown in fig. 5, the other end (eave-side end) of the right frame piece 20 overlaps the right end of the eave-side frame piece 30 and is fastened by a screw member 60. Therefore, the right frame piece 20 is provided with two screw groove portions 22 and 23, and correspondingly, two screw holes 31b are provided in the vertical wall portion 31 at the right end portion of the eave-side frame piece 30, and the screw members 60 are screwed by aligning these screw groove portions with the positions of the screw holes, whereby the right frame piece 20 and the eave-side frame piece 30 are fastened.
As shown in fig. 6, a slit of a predetermined length is formed in the end portion on the ridge purlin side of the right frame piece 20, with a portion of the extension piece 24 extending in the lateral direction from the upper end of the vertical wall portion 21 remaining, and the end portion (the right end portion on the front side in fig. 6) of the frame piece 40 on the ridge purlin side is fitted thereto and fastened by a screw member 60. Therefore, the extension piece 24 of the right frame piece 20 is provided with two screw holes 24a corresponding to the two screw groove portions 42a and 42b of the ridge purlin-side frame piece 40.
Connecting structure for frame pieces on eaves side and ridge purlin side
Next, the eaves-side frame piece 30 and the ridge purlin-side frame piece 40, and the connection structure thereof will be described in detail with reference to fig. 7 and 8 in addition to fig. 2. Fig. 7 is an enlarged cross section showing a first coupling portion and a second coupling portion when the frame piece 30 (first frame piece) provided on the eave side and the frame piece 40 (second frame piece) provided on the ridge purlin side are coupled, respectively, and fig. 8 is a structure for securing electrical connection when the first coupling portion and the second coupling portion are coupled.
First, as shown on the left side of fig. 2, the frame piece 30 on the eave side is provided with a pair of upper and lower holding pieces 32a and 32b extending from the upper end of the vertical wall portion 31 toward one side (the inner side of the solar cell module main body, and also the ridge purlin side or the upper side in the water flow direction). These vertical wall portion 31 and holding pieces 32a, 32b are provided so as to extend over the entire length of the eaves-side frame piece 30 in the longitudinal direction (the direction perpendicular to the paper surface of fig. 2), and the eaves-side edge portion of the solar cell module main body 2 is fitted and held between the holding pieces 32a, 32 b.
In addition, a connecting piece 33a for connecting the frame piece 30 on the eave side to the frame piece 40 on the ridge purlin side of the other adjacent solar cell module 1' is provided so as to extend from the lower end portion of the vertical wall portion 31 to the ridge purlin side in a curved manner, and the vertical wall portion 31 and the connecting piece 33a constitute a first connecting portion, in the present embodiment, a connecting member 33 as a separate member is attached to the vertical wall portion 31 of the frame piece 30 on the eave side, and the connecting piece 33a is constituted, that is, the connecting member 33 has a shape of approximately L in cross section as shown in fig. 2, and the vertical wall portion 33b thereof is overlapped from the back side with the vertical wall portion 31 of the frame piece 30 on the eave side and is fastened by a screw member 34.
The vertical wall 31 as a part of the frame piece 30 on the eave side and the connecting piece 33a as a part of the connecting member 33 are both made of aluminum alloy anodized with aluminum, and a layer of aluminum oxide as an insulating layer is formed on the surface. However, since the insulating layer of the screw hole, which is the fastening portion of the screw member 34, is removed and the screw member 34 is made of a conductive material such as stainless steel, the vertical wall portion 31 and the connecting piece 33a are electrically connected.
On the other hand, the tip end portion of the connecting piece 33a extends toward the ridge purlin side (right side in fig. 2), and is inserted between the upper wall portion 44 of the frame piece 40 on the ridge purlin side and the fixing piece 47 provided on the upper portion thereof to be gripped as shown in fig. 7. That is, the second coupling portion is configured by providing a standing piece extending upward from the upper wall portion 44 on the upper surface of the frame piece 40 constituting the ridge purlin side, forming a fixing piece 47 extending leftward (eaves side and downward in the water flow direction) from the standing piece in parallel with the upper wall portion 44, and forming an insertion portion into which the coupling piece 33a can be inserted between the upper wall portion 44 and the fixing piece 47.
The tip of the coupling piece 33a thus gripped is provided with a curved portion 33c curved upward, a flat portion 33d having a flat upper surface, and a curved portion 33e curved downward, and the thickness increases in the vertical direction at the tip. The portion having a large thickness at the distal end is not limited to the curved shape, and a convex portion protruding upward may be provided near the distal end so that the thickness itself of the distal end of the connecting piece 33a becomes locally thick. By providing the portion having a large local thickness like the convex portion, the connection strength between the first connection portion and the second connection portion can be increased while maintaining the lightweight property without increasing the thickness of the entire connection piece 33 a.
As shown in the right side of fig. 2, the ridge-purlin-side frame piece 40 on which the roof-side frame piece 30 is placed in this manner includes two vertical wall portions 41a and 41b extending in the vertical direction in the cross section, a screw groove portion 42a having a C-shaped cross section is formed at the upper end portion of the ridge-purlin-side vertical wall portion 41a so as to open toward the ridge purlin side, and a screw groove portion 42b having a C-shaped cross section is formed at the upper end portion of the ridge-purlin-side vertical wall portion 41b so as to open toward the eave side, and the screw member 60 is screwed as described above with reference to fig. 3.
A pair of upper and lower holding pieces 43a and 43b extending toward the eaves side are provided at the upper end of the eaves-side vertical wall 41a, and the edge of the solar cell module body 2 on the ridge purlin side is fitted and held therebetween. Further, an upper wall portion 44 is provided to connect upper end portions of the two vertical wall portions 41a and 41b to each other, and a lower wall portion 45 is provided to connect lower end portions of the two vertical wall portions 41a and 41b to each other. That is, the frame piece 40 on the ridge purlin side has a substantially box-shaped closed cross section in cross section, and the rigidity thereof is improved.
A locking piece 46 that projects downward from the vicinity of the ridge purlin-side edge portion of the lower surface of the lower wall portion 45 of the frame piece 40 on the ridge purlin side and then extends toward the eaves side is provided, and the locking piece 46 is locked to one end portion of an attachment fitting 102 fixed to a shingle 101 on an roof panel 100 of a roof, as described below with reference to fig. 9. In addition, a stepped portion is formed by bending the lower surface of the lower wall portion 45, so that one end portion of the attachment fitting 102 can be easily fitted.
In addition, an upright piece projecting upward from the vicinity of an edge portion on the ridge purlin side on the upper surface thereof is provided on the upper wall portion 44 of the frame piece 40 on the ridge purlin side, and a fixing piece 47 extending from the upper end of the upright piece in parallel with the upper wall portion toward the eaves side and an extending piece 48 extending toward the ridge purlin side in the opposite direction are provided. As shown in fig. 7 and 8, the eaves-side frame piece 30 of the adjacent solar cell modules 1' is placed, and the connecting piece 33a of the eaves-side frame piece 30 is inserted into and held at the insertion portion between the upper surface of the upper wall portion 44 and the fixing piece 47.
That is, in a photovoltaic system in which a plurality of solar cell modules 1 according to the present invention are provided as described below with reference to fig. 9, the solar cell modules are laid on the roof by placing the frame pieces 30 on the eaves side of the solar cell modules 1' on the ridge purlin sides adjacent to each other on the frame pieces 40 on the ridge purlin side of the solar cell modules 1 laid on the roof in an overlapping manner. At this time, as shown by the arrow in fig. 8, the coupling piece 33a of the frame piece 30 on the eave side is fitted from the tip side to the insertion portion between the upper surface of the upper wall portion 44 of the frame piece 40 on the ridge purlin side and the fixing piece 47, and is held.
In the present embodiment, as described above, the first coupling portion and the second coupling portion, which are portions where the eaves-side frame piece 30 and the ridge-purlin-side frame piece 40 are mechanically coupled to each other, are electrically connected to each other. With this arrangement, when the plurality of solar cell modules 1 and 1' are installed on the roof, it is not necessary to use a grounding wire for grounding, and the frame 3 of each solar cell module is electrically connected to each other by a wire or a wiring wire by routing the grounding wire to the frame 3 of all the individual solar cell modules, thereby simplifying the installation operation.
As can be seen in detail from fig. 8, a plate spring 50 (conductive member) having a J-shaped cross section is attached to the fixing piece 47 of the frame piece 40 on the ridge purlin side. The plate spring 50 has an upper portion 50b longer than a lower portion 50a (only denoted by a reference numeral in fig. 8), and an upper portion 50b attached so as to extend from the upper surface of the fixing piece 47 across the upper surface of the extending piece 48 on the ridge purlin side, and is fastened to the extending piece 48 by a screw member 51. The lower portion 50a is disposed below the fixing piece 47 in the insertion portion between the fixing piece 47 and the upper wall portion 44.
That is, a circular hole 50c is opened in the upper portion 50b of the plate spring 50 at a portion closer to the ridge purlin, and a shaft portion of a screw member 51 inserted from above is screwed into a screw hole (no reference numeral) provided in the extension piece 48. In the present embodiment, the screw member 51 is made of stainless steel, and by screwing the screw hole as described above, electrical connection (conduction) between the aluminum alloy extension piece 48 and the frame piece 40 on the ridge purlin side continuous thereto is ensured.
Both the plate spring 50 and the screw member 51 are made of a conductive material such as steel or stainless steel, and electrical connection is ensured if they are in contact with each other. However, since a gap is easily formed between the shaft portion of the screw member 51 and the circular hole 50c of the plate spring 50 through which the screw member is inserted, and the electrical connection is not reliable depending on the relationship between the shape and size of the head of the screw member 51 and the size of the circular hole 50c, in the present embodiment, although not shown, a protrusion is provided on the back surface of the head portion of the screw member 51 and bites into the upper surface of the peripheral edge portion of the circular hole 50 c. Thereby, the electrical connection between the upper portion 50b of the steel plate spring 50 and the screw member 51 can be ensured.
The steel plate spring 50 attached to the fixing piece 47 of the frame piece 40 on the purlin side made of aluminum alloy in this manner is electrically connected to the frame piece 40 on the purlin side via a screw member 51 made of stainless steel. The plate spring 50 is electrically connected to the connecting piece 33a of the eaves-side frame piece 30, and the eaves-side frame piece 30 and the ridge-purlin-side frame piece 40 of the adjacent solar cell modules 1 and 1' (frame bodies 3) are electrically connected to each other.
As shown in detail by the arrow in fig. 8, when the connecting piece 33a of the eaves-side frame piece 30 of the adjacent solar cell module 1' is fitted between the upper surface of the upper wall portion 44 of the ridge purlin-side frame piece 40 of the solar cell module 1 and the fixing piece 47, the flat portion 33d provided on the tip end side of the connecting piece 33a comes into contact with the lower portion 50a of the plate spring 50 attached to the fixing piece 47, and presses and elastically deforms the lower portion 50 a.
As shown in the drawing, the lower portion 50a of the plate spring 50 is formed so as to be farther from the lower surface of the fixing piece 47 toward the tip end side thereof, in other words, so as to provide a gap therebetween, and the interval therebetween becomes wider as it goes to the depth of the insertion portion. That is, the distance between the plate spring 50 and the upper wall 44 on the inlet side of the insertion portion is increased, and the distance is decreased toward the depth of the insertion portion, so that the coupling piece 33a of the first coupling portion can be easily inserted into the insertion portion, and the first coupling portion and the second coupling portion can be firmly fixed by inserting the coupling piece 33a into the depth of the insertion portion. When the flat portion 33d of the coupling piece 33a comes into contact with the lower portion 50a to push it up, the lower portion 50a is elastically deformed upward. As shown in fig. 7, the lower surface of the lower portion 50a of the elastically deformed plate spring 50 is pressed against the upper surface of the flat portion 33d on the distal end side of the coupling piece 33 a.
In the present embodiment, the upper surface (contact surface) of the flat portion 33d pressed by the lower surface of the lower portion 50a of the plate spring 50 is processed in advance to provide the conduction securing portion from which the insulation coating is removed. The connecting piece 33a is provided in the connecting member 33 separate from the eaves-side frame piece 30, and the connecting member 33 is also an extrusion-molded product made of an aluminum alloy similarly to the eaves-side frame piece 30, and has an insulating coating formed on the surface thereof by aluminum anodizing, and as described above, the eaves-side frame piece 30 and the connecting member 33 are electrically connected to the fastening portion of the screw member 34.
Therefore, in order to ensure the electrical connection between the lower surfaces of the lower portions 50a of the plate springs 50 that are pressed, as described above, the entire upper surface (the contact surface with the conductive member) of the flat portion 33d that is pressed is processed, and the conductive ensuring portion in which the insulation coating is removed is provided. In this way, if the upper surface of the flat portion 33d of the coupling member 33, which is a member different from the eaves-side frame piece 30, is integrally processed, the processing is relatively easy. Further, although the corrosion resistance of the portion from which the insulating coating is removed is lowered, in the present embodiment, the conduction securing portion is located at a position where moisture causing corrosion is unlikely to enter because the conduction securing portion is an upper surface in the insertion portion, and the solar cell module main body 2 covers the upper side thereof, so that the occurrence of corrosion caused by the removal of the insulating coating can be sufficiently suppressed.
In the present embodiment, the flat portion 33d is provided on the upper surface of the convex portion that is locally thickened at the tip end portion of the connecting piece 33a and protrudes upward in the vicinity of the tip end portion, and thus the plate spring 50 can be more closely joined to the conduction securing portion provided on the upper surface of the flat portion 33d, and thus conduction between the frame piece 30 on the eave side and the frame piece 40 on the purlin side can be more reliably achieved.
Further, although not shown, the plate spring 50 may be provided at substantially the center in the longitudinal direction of the frame piece 40 on the ridge purlin side, and a total of three portions may be provided at portions near both ends, respectively, and by providing such an arrangement, when the solar cell modules 1 and 1' are provided on a roof as described below with reference to fig. 9, it is possible to cope with various arrangement patterns such as not only alignment in the left-right direction but also staggered arrangement in a left-right direction.
That is, for example, when the solar cell module 1 on the eaves side and the solar cell module 1 'on the ridge purlin side are arranged offset from each other in the left-right direction, the solar cell module 1 on the eaves side and the solar cell module 1' on the ridge purlin side can be electrically connected via the plate spring 50 arranged at a portion close to the end portion. Even when the solar cell module 1 on the eaves side and the solar cell module 1' on the ridge purlin side have different lengths in the left-right direction, the solar cell modules can be electrically connected to each other via the plate spring 50 disposed in any of the three locations.
The shape of the plate spring 50 is not limited to the above configuration for the second coupling portion, and for example, the plate spring 50 may not have the lower portion 50a, a pin-shaped convex portion protruding downward may be provided on the lower surface of the plate spring 50, an opening through which the convex portion passes may be provided in the fixing piece 47, and the convex portion provided in the plate spring 50 may be positioned below the fixing piece 47 in the insertion portion of the second coupling portion through the opening. Further, the plate spring 50 may have a portion bent downward so as to provide a cut portion in which the fixing piece 47 located directly below the plate spring 50 is partially removed, and a portion of the plate spring 50 may be located below the fixing piece 47, that is, in the insertion portion of the second coupling portion, through the cut portion.
Assembly of solar modules and laying of roofs
When the solar cell module 1 is assembled using the frame pieces 10, 20, 30, and 40, an end face sealing member (not shown) such as an elastomer resin is first fitted to the peripheral edge portion of the solar cell module main body 2. Next, the two long-side edge portions are respectively fitted into the holding pieces 32a and 32b of the eaves-side frame piece 30 and the holding pieces 43a and 43b of the ridge-purlin-side frame piece 40, and the two short-side edge portions are respectively fitted into the holding pieces 12a and 12b of the left-side frame piece 10 and the holding pieces (not shown) of the right-side frame piece 20.
The ends of the frame pieces 10, 20, 30, and 40 adjacent in the circumferential direction are butted against each other around the solar cell module main body 2 in this manner, and are fastened by the screw members 60 as described above with reference to fig. 3 to 6. As a result, the four frame pieces 10, 20, 30, and 40 constitute the frame body 3 as a whole, and are held at the peripheral edge of the solar cell module main body 2, as shown in fig. 1. That is, the solar cell module 1 is assembled.
In the present embodiment, the solar cell modules 1 thus assembled are laid on the roof of a house in order from the eaves side toward the ridge purlin side. That is, as shown in fig. 9, when laying on roof boarding 100 of a roof, frame pieces 30 on the eave side are arranged on the eave side (left side in fig. 9), frame pieces 40 on the ridge purlin side are arranged on the ridge purlin side (right side in fig. 9), and the frame pieces 40 on the ridge purlin side are provided substantially along the inclination of the roof so as to be higher than the frame pieces 30 on the eave side. That is, the frame piece 30 on the eave side is disposed on the lower side of the roof in the water flow direction, and the frame piece 40 on the ridge purlin side is disposed on the upper side of the roof in the water flow direction.
Then, the frame piece 30 on the ridge side of the solar cell module 1' adjacent to the ridge side is arranged so as to overlap the frame piece 40 on the ridge side of the solar cell module 1 laid on the ridge side, and laid from the ridge side toward the ridge side. That is, the roofing shingle 101 of the roof panel 100 is fixed to the attachment metal 102 by the screw member 110, and one end of the attachment metal 102 is locked by the locking piece 44 provided at the lower portion of the frame piece 40 on the ridge purlin side.
Next, the connecting member 33 of the frame piece 30 attached to the eaves side is fixed to the frame piece 40 on the ridge purlin side of another solar cell module 1 ″ already laid on the eaves side, that is, as shown in fig. 9, the connecting member 33 has a cross section of L, and a connecting piece 33a extending from a lower portion thereof toward the ridge purlin side is overlapped with the frame piece 40 on the ridge purlin side from above, and is held by an insertion portion provided between a fixing piece 47 and an upper wall portion 44 on an upper portion of the connecting member 33.
In the solar cell module 1, the ridge-side frame piece 40 is fixed to the roof shingle 101 on the roof panel 100 via the attachment fitting 102, and the eaves-side frame piece 30 is fixed to the roof shingle 101 of the roof panel 100 via the ridge-side frame piece 40 of another solar cell module 1 adjacent to the eaves side. Note that illustration of the fixing structure of the eaves-side frame piece 30 of the solar cell module 1 in the lowermost row on the eaves side and the fixing structure of the ridge-purlin-side frame piece 40 of the solar cell module 1 in the uppermost row on the ridge purlin side is omitted. In this way, a solar photovoltaic power generation system is configured in which a plurality of solar cell modules 1 are provided on a roof.
As described above, in the present embodiment, the solar cell modules 1 and 1 'provided on the roof so as to be adjacent to each other on the eave side and the ridge purlin side are mechanically connected by grasping the connecting piece 33a provided on the frame piece 30 on the eave side of the solar cell module 1' on the ridge purlin side at the insertion portion between the fixing piece 47 and the upper wall portion 44 of the frame piece 40 on the ridge purlin side of the solar cell module 1 on the eave side. Further, electrical connection is secured between the first connecting portion including the connecting piece 33a of the frame piece 30 on the eave side and the second connecting portion including the upper wall portion 44 of the frame piece 40 on the ridge purlin side and the fixing piece 47.
That is, in the fixing piece 47 of the frame piece 40 on the ridge purlin side, the flat portion 33d on the tip end side of the coupling piece 33a in the frame piece 30 on the eave side is pressed against the lower portion 50a of the plate spring 50 attached to be electrically connected to the frame piece 40 on the ridge purlin side, and the insulation coating on the upper surface of the flat portion 33d is peeled off to form a conduction securing portion, whereby the electrical connection (conduction) between the plate spring 50 and the coupling piece 33a can be secured.
As described above, since the solar cell modules can be electrically connected to each other, if the eaves-side frame piece 30 or the ridge purlin-side frame piece 40 of any one of the solar cell modules 1 and 1' provided adjacently on the roof is grounded, the solar cell modules can be grounded on the entire photovoltaic power generation system, and it is not necessary to wind a grounding wire for grounding all the individual solar cell modules, and workability can be improved.
In the present embodiment, the connecting piece 33a is provided in the connecting member 33 which is a member different from the frame piece 30 on the eave side, but since the connecting member 33 is made of the same aluminum alloy as the frame piece 30 on the eave side, it is possible to achieve a lighter weight than the case of using a general conductive metal such as a plated steel plate or stainless steel, and further, it is possible to suppress the occurrence of corrosion in the case of bringing an aluminum alloy into contact with a different kind of metal such as a steel material or stainless steel in a large area. Further, since the frame piece 30 on the eave side is provided separately from the frame piece 30 on the eave side, the frame piece 30 can be attached after the upper surface of the flat portion 33d of the coupling piece 33a is easily machined by a normal machining device such as a milling cutter.
[ second embodiment ]
Other embodiments of the present invention will be described below. For convenience of explanation, members having the same functions as those described in the first embodiment are given the same reference numerals, and explanations thereof are omitted. As shown in fig. 10, in the second embodiment, a connecting piece 33a, which is a different member from the first embodiment, is integrally formed continuously with the vertical wall portion 31 of the eaves-side frame piece 30. That is, the coupling piece 33a extends from the lower portion of the vertical wall portion 31 to the ridge purlin side while being bent, and is provided with a bent portion 33c, a flat portion 33d, and a bent portion 33e on the distal end side thereof.
As described above, if the connecting pieces 33a are provided continuously with the vertical wall portions 31 of the frame pieces 30 on the eave side, since they are made of an aluminum alloy, they can be formed temporarily by extrusion molding, and by integrating the members in this manner, the number of members and the number of steps in assembly can be reduced, and strength and durability can be improved.
[ conclusion ]
A solar cell module (1) according to embodiment 1 of the present invention includes: a quadrangular solar cell module main body (2); and a first frame piece (30) and a second frame piece (40) which are fixed to the peripheral edges of the two opposing sides of the solar cell module body, respectively, and which are formed of a conductor having an insulating coating on the surface. The first frame piece and the second frame piece are provided with first connecting portions (31, 33a) and second connecting portions (44, 47) for connecting the second frame piece and the first frame piece of another adjacent solar cell module (1'), the second connecting portions are provided with conductive members (50) fixed in a state of being electrically connected to the inside of the conductor, and the first connecting portions are provided with conduction-securing portions in which the insulating coating of the portions in contact with the conductive members is removed.
With this configuration, at the coupling portion (first and second coupling portions) between the frames of the adjacent solar cell modules, the conduction member electrically connected to one frame presses the conduction member against the conduction member electrically connected to the other frame, and the insulation covering of the other frame is peeled off, thereby ensuring electrical connection. Thus, it is not necessary to form a member for providing the conduction securing portion from a metal different from that of the frame body, and the solar cell module can be reduced in weight and improved in workability.
A solar cell module according to aspect 2 of the present invention includes a connecting sheet (33), wherein the connecting sheet (33) has a portion in which the first connecting portion extends in an inner direction of the solar cell module, and the second connecting portion includes: an upper wall portion of the second frame piece; a standing part extending upward from the upper surface of the upper wall part; and a fixing piece (47) extending from the standing portion in parallel with the upper surface of the second frame piece, wherein an insertion portion into which the tip end portion of the connecting piece is inserted is provided between the upper wall portion and the fixing piece. The conduction member is fixed so as to be positioned below the fixed piece in the insertion portion, and the conduction securing portion is provided on an upper surface of a distal end portion of the connecting piece.
In the solar cell module according to aspect 3 of the present invention, the conduction member is fixed with a space between the fixing pieces, and the conduction member is elastically deformed when the connection piece is inserted into the insertion portion, and the conduction securing portion presses the conduction member to hold the connection piece. With this arrangement, the conductive member can be strongly pressed against the conduction securing portion of the connecting piece, and the electrical connection can be more reliably made.
In the solar cell module according to aspect 4 of the present invention, a protruding portion protruding upward is provided at a distal end portion of the connecting piece inserted into the insertion portion, and the conduction securing portion is provided on an upper surface of the protruding portion. By providing the portion having a large local thickness like the convex portion, the connection strength can be improved while keeping the lightness without increasing the thickness of the entire connection piece.
In another aspect of the invention, according to aspect 5, in a photovoltaic power generation system in which a plurality of solar cell modules as described above are connected and installed on a roof, either one of the first frame piece and the second frame piece is grounded. By so doing, it is possible to ground all the solar cell modules without having to draw a ground wiring for grounding with respect to the individual solar cell modules.
The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention. Further, by combining the technical means disclosed in the respective embodiments, new technical features can be formed.
For example, in each of the above embodiments, all of the four frame pieces 10, 20, 30, and 40 constituting the frame body 3 are made of an aluminum alloy, and the connecting member 33 attached to the eave-side frame piece 30 is also made of an aluminum alloy, but these materials are not limited to aluminum alloys, and the insulating coating is not limited to a layer of aluminum oxide obtained by aluminum anodizing. For example, the present invention can be applied to a case where the frame pieces 10, 20, 30, and 40 are made of steel, aluminum, or a combination of these materials, and the surfaces thereof are coated with an insulating coating such as acrylic resin or epoxy resin to form an insulating coating. The plate spring 50 attached to the fixing piece 47 of the frame piece 40 on the ridge purlin side is made of steel, and the screw member 51 for fastening the plate spring is made of stainless steel.
In the above embodiments, the case where the electrical connection portions are provided at the portions connecting the solar cell module 1 on the eave side and the solar cell module 1' on the ridge purlin side has been described, but the present invention is not limited to this, and the configuration of the present invention can be applied to the portions connecting the solar cell modules adjacent to each other on the left and right when viewed from the eave side. In each of the above embodiments, the tile-integrated solar cell module 1 is exemplified as a solar cell module, but the present invention can also be applied to a solar cell module that is not tile-integrated.
Claims (3)
1. A solar cell module includes: a quadrangular solar cell module main body; and a solar cell module which is fixed to peripheral edges of two opposite sides of the solar cell module main body, and includes a first frame piece and a second frame piece, each of which is formed of a conductor having an insulating coating on a surface thereof, wherein:
the first frame piece and the second frame piece include a first connecting portion and a second connecting portion for connecting the second frame piece and the first frame piece of another adjacent solar cell module,
the second connection portion has a conductive member fixed in a state of being electrically connected to the inside of the conductor, the first connection portion has a conduction securing portion in which an insulation coating of a portion abutting on the conductive member is removed,
the first connecting portion includes a connecting piece extending toward the inside of the solar cell module,
the second coupling part includes: an upper wall portion of the second frame piece, an upright portion extending upward from an upper surface of the upper wall portion, and a fixing piece extending from the upright portion in parallel with the upper surface of the second frame piece, wherein an insertion portion into which a tip end portion of the connecting piece is inserted is provided between the upper wall portion and the fixing piece,
the conduction member is fixed so as to have a portion located below the fixing piece in the insertion portion,
a convex portion protruding upward is provided at a distal end portion of the connecting piece inserted into the insertion portion,
the top of the convex part is provided with a flat part of which the upper surface is a flat surface,
the upper surface of the flat portion is provided with the conduction securing portion,
the interval between the conducting member and the upper wall portion becomes narrower toward the depth of the insertion portion,
in a state where the flat portion of the connecting piece is in contact with a lower portion of the conductive member and the lower portion is elastically deformed upward, a lower surface of the lower portion of the conductive member is pressed against an upper surface of the flat portion of the connecting piece.
2. The solar cell module of claim 1,
the conduction member is fixed with a space from the fixing piece,
the conductive member is elastically deformed when the connection piece is inserted into the insertion portion, and the conduction securing portion is pressed against the conductive member to hold the connection piece.
3. A solar power generation system is characterized in that,
a plurality of solar cell modules according to claim 1 or 2 are connected and installed on a roof,
either one of the first frame piece and the second frame piece is grounded.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-201711 | 2017-10-18 | ||
| JP2017201711A JP2019075928A (en) | 2017-10-18 | 2017-10-18 | Solar cell module and photovoltaic power generation system |
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| CN109687814A CN109687814A (en) | 2019-04-26 |
| CN109687814B true CN109687814B (en) | 2020-08-07 |
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| CN201811199054.XA Active CN109687814B (en) | 2017-10-18 | 2018-10-15 | Solar cell module and solar photovoltaic power generation system |
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| CN117277940A (en) * | 2023-08-16 | 2023-12-22 | 锦州阳光能源有限公司 | Photovoltaic tile connection structure of household photovoltaic roof and installation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206517343U (en) * | 2016-11-01 | 2017-09-22 | 常州天合光能有限公司 | Sloped roof water proof type photovoltaic module erecting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001193245A (en) * | 1999-10-25 | 2001-07-17 | Matsushita Electric Works Ltd | Solar battery frame structure, solar battery roof tile and mounting method therefor, and hot-water supply system using solar energy |
| JP3778420B2 (en) * | 2000-06-16 | 2006-05-24 | 積水ハウス株式会社 | Connection structure for rooftop equipment |
| JP4247963B2 (en) * | 2003-02-26 | 2009-04-02 | 京セラ株式会社 | Solar power plant |
| JP2009123861A (en) * | 2007-11-14 | 2009-06-04 | Covalent Materials Tokuyama Corp | Method of manufacturing epitaxial wafer |
| TWI659474B (en) * | 2008-10-31 | 2019-05-11 | 日商半導體能源研究所股份有限公司 | Semiconductor device and method for manufacturing the same |
| US8492756B2 (en) * | 2009-01-23 | 2013-07-23 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and method for manufacturing the same |
| JP6204720B2 (en) * | 2012-07-05 | 2017-09-27 | シャープ株式会社 | Frame body and solar cell module provided with the frame body |
| TWM482160U (en) * | 2013-11-26 | 2014-07-11 | Hulk Energy Technology Co Ltd | Solar cell module array of grounding device |
| GB201605135D0 (en) * | 2016-03-25 | 2016-05-11 | Estill Ewen | Solar panel mounting |
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| CN206517343U (en) * | 2016-11-01 | 2017-09-22 | 常州天合光能有限公司 | Sloped roof water proof type photovoltaic module erecting device |
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| CN109687814A (en) | 2019-04-26 |
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