JP4895745B2 - CIS thin film solar cell module - Google Patents

Description

  The present invention relates to a CIS type thin film solar cell module mounted on an improved frame adapted to a CIS type thin film solar cell module.

  In a solar cell module, a structure in which a frame (outer frame) is usually installed on the outer periphery of a plate-like solar cell panel is provided in order to maintain the durability of the solar cell module or for convenience in installation (see, for example, Patent Document 1). ) Is adopted. As shown in FIG. 8, the frame (outer frame) of the solar cell module described in Patent Document 1 receives light for storing a sealing material (sealing material) in a fitting portion of a frame into which the outer periphery of the panel is fitted. Positions or lengths of the upper and lower (front and back) panel tongue pieces 3b and 3c are provided with side recesses 24, rear side recesses 25, and recesses 26 in the fitting portion of the frame (outer frame) facing the outer ends of the solar cell panels. Are different from each other in that the lower tongue piece 3c for panel fitting on the back side (lower side) is longer, and the outer periphery of the solar cell panel is placed on the upper and lower (front and back) panel tongue pieces 3b, 3c on the frame (outer frame). Thus, the frame (outer frame) is held in contact with the horizontal outer end surface of the solar cell panel at different positions in the upper and lower sides (front and back).

  The solar cell module frame (outer frame) has a fitting portion with a small amount of sticking out of the sealing material (sealing material), and has a function of storing the sealing material (sealing material), so that it has water resistance and water stopping properties. The lower tongue piece 3c of the frame (outer frame) that supports and clamps the lower surface (back surface) of the outer peripheral end of the solar cell module is supported by the lower tongue piece to support the load of the solar cell panel. The lower tongue piece support portion 3d is provided between 3c and the bottom portion, and the positions and shapes of the upper and lower (front and back) panel fitting tongue pieces 3b and 3c are complicated and there is a problem that the size is increased.

  Furthermore, the frame (outer frame) is used only for a solar cell panel whose outer end surface is horizontal, and like the CIS-based thin film solar cell module shown in FIG. The side surface is a horizontal surface like the solar cell panel, but the lower surface (back surface) of the outer peripheral edge is inclined or curved from the outside to the inside, and the lower surface (back surface) of such an outer peripheral end. There is a problem that it is not suitable for a solar cell panel having ().

JP 2000-243998 A (Patent No. 3806534)

  The present invention solves the above-mentioned problems. The object of the present invention is to reduce the weight of the frame (outer frame) at a low cost and with a simple structure while maintaining durability (the lower surface (back surface)). The CIS-based thin-film solar cell module (panel) having an outer peripheral end having a surface that is inclined or curved from the outside to the inside is easily and reliably fitted and clamped.

The present invention is a substantially rectangular plate shape consisting of a long side and a short side, the upper surface (front side) is horizontal with a cover glass, the lower surface (back side) is a back sheet, and the outer peripheral edge is A CIS-based thin-film solar cell module comprising a CIS-based thin-film solar cell panel having a curved or inclined structure, and a frame for holding and fixing the outer periphery of the CIS-based thin-film solar cell panel via a sealing material, The frame includes a long-side frame and a short-side frame for holding and fixing the outer end portion of the solar cell panel. The long-side frame has a main wall extending in a vertical direction and a panel near the upper portion of the main wall. An end fitting portion has an inverted “T” shaped bottom pedestal at the bottom of the main wall, and the short side frame has a main wall extending vertically and a panel end fitting portion in the vicinity of the upper portion of the main wall. a, the long side frame and frame for short sides The panel end fitting portion provided on is a sectional shape is substantially "U" -shaped or inverted "U" shape, made up of a top of said main wall and upper tongue piece and lower tongues , the upper tongue and Shimoshitahen, respectively its tip near is substantially placed horizontally at the same position, the upper tongue has a horizontal panel upper surface (surface), the lower tongue, curved or inclined and panels undersurface (backside), has a panel clamping unit respectively in surface contact in the vicinity of the tip, the long side frame and the inner upper tongue of the main wall constituting the panel end fitting portion of the short side frame A protrusion that contacts the side edge of the cover glass is provided at a position between the upper tongue piece and the lower tongue piece, and the upper tongue piece and the lower tongue piece are each provided with a recess by reducing the thickness near the main wall. It is constructed so as to provide the above-mentioned problems.

The present invention securely holds and fixes the outer peripheral end of the CIS-based thin-film solar cell panel in the vertical direction by the panel holding portion of the upper tongue piece and the lower tongue piece of the long side frame and the short side frame. It is something that can be done .

The present invention provides a space formed by a projection provided between the upper tongue piece and the lower tongue piece inside the main wall of the long side frame and the short side frame and the upper tongue piece, and the projection and the lower tongue. The sealing material can be securely held in the space formed by the pieces.

The present invention provides a space formed by a projection provided between the upper tongue piece and the lower tongue piece inside the main wall of the long side frame and the short side frame and the upper tongue piece, and the projection and the lower tongue. Since the space by the piece is ensured, the contact between the aluminum foil, which is a constituent member of the back sheet provided on the bottom surface of the CIS-based thin film solar cell panel, and the frame can be reliably prevented.

In the present invention, the long-side frame is formed with screw holes for screwing the short-side frame and the bottom pedestal on the lower tongue piece and the bottom pedestal, so that processing and assembly are easy and manufacturing cost is reduced. Is .

In the present invention, the lower tongue piece and the bottom pedestal of the frame for the long side are configured such that the thickness thereof is thicker than the upper tongue piece at the entire long piece or at both ends thereof , so that the strength of the frame is reduced while achieving weight reduction. It is ensured .

In the present invention, the short-side frame is formed with a screw through hole for screwing with the long-side frame at a corresponding portion of the main wall, thereby facilitating processing and assembly and reducing manufacturing costs. Is .

  According to the present invention, the outer peripheral end of the lower surface (back surface) is inclined or curved from the outside to the inside by a simple structure while maintaining the durability of the frame (outer frame) at a low cost, low cost, and durability. A CIS-based thin film solar cell module (panel) having a surface to be fitted can be easily and reliably fitted and clamped.

  The present invention provides an outer peripheral edge of a CIS thin film solar panel by a frame suitable for a structure having a horizontal top surface (front side) and a curved or inclined bottom surface (back side) as in a CIS thin film solar panel. Is a CIS-based thin-film solar cell module for sandwiching and fixing. As shown in FIGS. 2 and 3, the CIS-based thin film solar cell panel 2 has a top surface (front side) that is horizontal with a cover glass, and a bottom surface (back side) that has a back sheet and has an outer peripheral edge. The outer peripheral portion of the CIS-based thin film solar cell panel 2 is held and fixed by the frame 3 through the sealing material 7 with a structure in which the portion (outer peripheral portion) is curved or inclined.

  As shown in FIG. 1B, the frame 3 includes a long-side frame 3A and a short-side frame 3B for holding and fixing the outer peripheral end portion of the solar cell panel 2. As shown in FIGS. 1 (a) and 4, the main structural portion includes a main wall 3a extending in the vertical direction, a panel end fitting portion in the vicinity of the upper portion of the main wall, and an inverted “T” at the lower portion of the main wall. As shown in FIG. 6, a main wall 3a extending in the vertical direction and a panel end fitting portion in the vicinity of the upper portion of the main wall are provided as the main components of the short-side frame 3B. Have If necessary, the short side frame 3B may be provided with an inverted “T” -shaped bottom pedestal 3e at the lower portion of the main wall in the same manner as the long side frame 3A. As shown in FIG. 1 (a) and FIG. 3, the panel end fitting portion is easy to insert or fit the outer peripheral end of the CIS thin film solar cell panel 2, and the CIS thin film solar cell panel. The outer peripheral end portion is securely fixed and held, and the cross-sectional shape is composed of an upper tongue piece 3b and a lower tongue piece 3c having a substantially “U” shape or an inverted “U” shape, and the upper tongue piece 3b and The lower tongue piece 3c is installed at the same position in the substantially horizontal direction near the tip of each of the lower tongue pieces 3c, the panel holding portion b1 of the upper tongue piece is a horizontal panel upper surface (front surface), and the panel holding portion c1 of the lower tongue piece is The CIS type thin film is in contact with the curved and inclined panel lower surface (rear surface), respectively, and the upper side piece panel holding portion b1 and the lower side piece frame holding portion c1 of the long side frame 3A and the short side frame 3B. The outer end of the solar cell panel is held and fixed from above and below.

  Protrusions 3d that come into contact with the side edges of the cover glass are provided at positions between the upper tongue piece 3b and the lower tongue piece 3c inside the main wall 3a of the long side frame 3A and the short side frame 3B. The upper tongue piece 3b and the lower tongue piece 3c are provided with recesses b2 and c2, respectively, by reducing the thickness in the vicinity of the main wall. The protrusion 3d fixes the outer peripheral end of the CIS-based thin film solar cell panel in the horizontal direction, and collects a sealing material in the space formed by the protrusion 3d and the upper tongue piece 3b and in the space formed by the protrusion 3d and the lower tongue piece 3c. Furthermore, since a certain gap is formed between the main wall 3a of the long-side frame 3A and the short-side frame 3B and the outer peripheral edge of the panel by the projection 3d, the bottom surface of the CIS-based thin-film solar cell panel This prevents the aluminum foil 2C1, which is a constituent member of the back sheet 2C provided on the frame, from coming into contact with the frame. When the aluminum foil 2C1 in the back sheet 2C is in contact with the electrode of the solar cell submodule 4, when the aluminum foil 2C1 is in contact with the frame, the electrode of the solar cell submodule is electrically connected to the frame. Thus, since insulation cannot be maintained between the solar cell circuit and the outer frame, the solar cell module becomes a defective product. Since the projection 3d is in contact with the cover glass portion, the frame and the aluminum foil 2C1 are not in contact with each other even when the aluminum foil 2C1 and the electrode of the solar cell submodule 4 are in contact with each other. Insulation between frames is maintained. With this structure, the defective product occurrence rate of the solar cell module can be suppressed.

  As shown in FIG. 4, the long side frame 3A is provided with screw holes N1 in the lower tongue piece 3c and the bottom pedestal 3e in order to be screwed to the short side frame 3B. The lower tongue piece 3c and the bottom pedestal 3e of the long side frame 3A are thicker than the upper tongue piece at the whole long piece or at both ends thereof.

  As described above, the long side frame 3A needs to be provided with screw holes N1 in the lower tongue piece 3c and the bottom pedestal 3e, but as shown in FIGS. 5 (a) and 5 (b) The structure of the frame is simplified and processed by forming a simple-shaped mechanism portion with a cross-section of a circle, semicircle, square, etc. on the lower surface of the tongue piece 3c and the bottom pedestal 3e, and providing a screw hole N1 there. It becomes easy and a manufacturing cost is reduced.

  The short side frame 3B is provided with a screw penetration hole N2 for screwing with the long side frame 3A at a corresponding portion of the main wall 3a. Further, as described above, the panel end fitting portion in the vicinity of the upper portion of the main wall has the same structure as the long side frame 3A.

  The material of the frame of the present invention is lightweight, low-cost, durable, and also requires workability, so aluminum and aluminum alloys are mainly suitable, but steel materials, synthetic resin materials, A composite material containing carbon fiber can be used.

  As described above, the present invention provides a solar cell panel in which the outer peripheral end portion of the lower surface (back surface) is inclined or curved from the outside to the inside, as in the CIS-based thin film solar cell module (panel). The frame (outer frame) is lightweight, low-cost, and has a simple structure while maintaining durability. The long-side frame 3A and the short-side frame are suitable for the frame. Using 3B, the solar cell module (panel) can be easily and reliably fitted and clamped by a simple screwing operation.

(A) It is a figure (sectional drawing) which shows the structure of the principal part of the flame | frame in the CIS type thin film solar cell module of this invention. (B) It is a block diagram (plan view) of the CIS type thin film solar cell module of the present invention. It is a figure (sectional drawing) which shows the structure of the outer peripheral edge part of the CIS type thin film solar cell panel in the CIS type thin film solar cell module of this invention. It is a figure (cross-sectional view) which shows the state by which the outer peripheral edge part of the CIS type thin film solar cell panel in the CIS type thin film solar cell module of this invention was clamped by the flame | frame. It is a figure (sectional drawing) which shows the structure of the frame for long pieces of the CIS type thin film solar cell module of this invention. It is a figure (sectional drawing) which shows the other Example of the lower tongue piece of the frame for long pieces of a CIS type thin film solar cell module of this invention, and a bottom part base. It is a figure (sectional drawing) which shows the structure of the flame | frame for short pieces of the CIS type thin film solar cell module of this invention. It is a figure (sectional drawing) which shows the structure of the CIS type thin film solar cell device in the CIS type thin film solar cell module of this invention. It is a figure (sectional view) which shows the structure of the frame of the conventional solar cell module.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 CIS type thin film solar cell module 2 CIS type thin film solar cell panel 2B Cover glass 2C Back sheet 2C1 Aluminum foil (shield layer)
2C 'weather resistant film 24 concave portion 25 concave portion 26 concave portion 3 frame 3A long side frame 3B short side frame 3a main wall 3b upper tongue piece b1 panel clamping portion b2 concave portion 3c lower tongue piece c1 panel clamping portion c2 concave portion 3d bottom pedestal 3e Projection 3f Lower tongue piece support 4 CIS thin film solar cell submodule 5 CIS thin film solar cell device 5A Glass substrate 5B Alkali barrier layer 5C Metal back electrode layer 5D P-type CIS light absorption layer 5E High resistance buffer layer 5F n-type Window layer (transparent conductive film)
5C 'solar cell element 6 filler 7 sealing material N screw N1 screw hole N2 screw penetration hole

Claims (4)

It is an approximately square plate shape consisting of a long side and a short side, the upper surface (front side) is horizontal with a cover glass, and the lower surface (back side) is a back sheet with its outer peripheral edge curved or inclined. A CIS-based thin-film solar cell module comprising: a CIS-based thin-film solar cell panel having a structure; and a frame for holding and fixing the outer periphery of the CIS-based thin-film solar cell panel via a sealing material,
The frame comprises a long side frame and a short side frame for holding and fixing the outer end portion of the solar cell panel,
The long side frame has a main wall extending in the vertical direction, a panel end fitting portion near the upper portion of the main wall, and an inverted “T” -shaped bottom pedestal at the lower portion of the main wall. The frame has a main wall extending in the vertical direction and a panel end fitting portion near the upper portion of the main wall,
The panel end fitting portion provided on the long side frame and a short side frame, the cross-sectional shape is a substantially "U" -shaped or inverted "U" shape, upper tongue piece and Shimoshitahen is composed of a upper of the main wall, the upper tongue and Shimoshitahen, respectively placed the tip vicinity in a substantially horizontal direction at the same position, the upper tongue has a horizontal panel upper surface (surface) , the lower tongue has a curved or angled portion of the peripheral edge of the panel lower surface (back surface), the panel clamping unit respectively in surface contact with the vicinity of the tip,
A protrusion that contacts the side edge of the cover glass at a position between the upper tongue piece and the lower tongue piece inside the main wall constituting the panel end fitting portion of the long side frame and the short side frame. In addition, the upper tongue piece and the lower tongue piece are each provided with a recess by reducing the thickness near the main wall,
The outer edge of the CIS-based thin film solar cell panel is held and fixed from above and below by the panel holding portion of the upper tongue piece and the lower tongue piece panel holding portion of the long side frame and the short side frame, and for the long side Sealing material in the space between the upper tongue piece and the protrusion provided at the position between the upper tongue piece and the lower tongue piece inside the main wall of the frame and the short side frame, and the space between the protrusion and the lower tongue piece The CIS thin film solar cell module is characterized by preventing contact between the aluminum foil, which is a constituent member of the back sheet provided on the bottom surface of the CIS thin film solar cell panel, and the frame . 2. The CIS-based thin-film solar cell module according to claim 1 , wherein the long-side frame is formed with screw holes for screwing with the short-side frame on a lower tongue piece and a bottom pedestal thereof.   3. The CIS-based thin-film solar cell module according to claim 1, wherein the lower tongue piece and the bottom pedestal of the long side frame are thicker than the upper tongue piece at the whole long piece or at both ends thereof. The said short side frame formed the screw penetration hole for screwing with the long side frame in the applicable location of the main wall, The one of Claim 1 thru | or 3 characterized by the above-mentioned. CIS thin film solar cell module.

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